JPH02162559A - Automatic cassette loading device for magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent a cassette from being incompletely loaded by providing a specified linking mechanism to transmit motive force from a motor, which drives a loading mechanism, to a cassette holder which holds and carries the cassette. CONSTITUTION:A dumper unit 2 is set in a lever A1 and a lever B3 is provided operatably in the same direction as the lever A1. Then, a lack gear 4 is provided in one edge and engaged with an input/output part gear 6 of the unit 2. When the gear 6 is rotated in a (g) direction, small load is generated in the unit 2 and when the gear 6 is rotated in an (h) direction, the large load is generated. When the cassette is inserted, it is not necessary to pay attention to inserting force and an inserting speed and when the cassette is pushed to a place where a switch 7 is turned on, the cassette is loaded without fail. Even when the cassette is pushed more than it is needed, since a spring 8 is extended and excess stroke is absorbed, it is not necessary to pay attention to the pushing quantity of the cassette as well.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic cassette loading device for a magnetic recording/reproducing device.

(Prior Art) A conventional automatic cassette loading device will be explained based on FIGS. 6 and 7.

FIG. 6 is a perspective view of a conventional automatic cassette loading device.
FIGS. 7(a) to 7(d) show its structure and operation. The rotational force of the motor is transmitted to the lever Az2 through the belt, worm, worm wheel, and transmission gear 21.

A part of lever A22 is cut and raised part 24 of lever 823.
The lever B23 can be directly pushed in the C direction.

A spring 25 is applied to the lever A22 and the lever B23, and the lever A22 can be pulled in the b direction via the spring 25.

The lever B23 is provided with a gear in a part thereof, and meshes with a gear part provided on the wiper arm 26, so that the movement of the lever B23 in the C direction causes the movement of the wiper arm 26 in the C direction, and the b The movement in the direction is the movement in the C direction.

The cassette holder 27 moves according to a guide groove 29 provided in the cassette holder guide 28. The protrusion 30 of the cassette holder 27 engages with a longitudinal groove provided in the wiper arm 26, and as the wiper arm 26 moves in the c and c directions, the cassette holder 27 moves in the e and f directions.

31 is a switch, which is engaged with lever B23;
When the lever B23 moves a certain amount in the C direction, a circuit for driving the motor 32, which turns on the switch 31, is activated.

Cassette stoppers 33 are provided on the left and right sides of the cassette holder 27, and when a cassette is inserted and hits the cassette stoppers 33, the cassette holder 27 moves in the C direction, the lever B23 moves in the C direction, and the switch 31 turns on the motor. 32 starts rotating, and the cassette is loaded into the magnetic recording/reproducing device.

(Problem to be Solved by the Invention) However, in the above configuration, in order for the cassette to be loaded into the cassette device and installed in the correct positional relationship with the positioning post, reel table, etc. of the magnetic recording/reproducing device, the front surface of the cassette must be It is necessary to load the cassette while it is in contact with the cassette stopper.

In order to use the conventional example shown in FIG. 6 to satisfy this condition, insert the cassette gently, press the cassette stopper 33 on the front of the cassette 34, and press the cassette holder 27 into the C position.
direction, wiper arm 26 in direction C, lever B23
slide in the C direction and turn on the switch 31.

At this time, since a load from the deceleration mechanism side is acting on the lever A22, the lever A22 is not moving in the C direction, and the spring 25 is in a more stretched state than before the cassette was inserted.

The switch 31 turns on, the motor 32 rotates, and the lever A
22 moves in the C direction and the cut and raised portion 24 of the lever B23 is moved.
cassette 3 until it comes into contact with the
If the rear of the cassette 4 is kept pressed by hand, the cassette 34 is loaded in contact with the cassette stopper 33, and is installed in the correct position of the magnetic recording/reproducing apparatus.

However, if you let go of your hand midway, even though the motor 32 has started rotating, the lever B23 is pulled by the spring 25 and the raised portion 24 of the lever A22 and lever B23 is pulled by the spring 25.
The shock causes the cassette 34 to be loaded away from the cassette stopper 33.

In this state, the cassette cannot be installed in the correct position, causing the cassette to collide with the reel table or damage the tape.

That is, in the conventional example, even if the cassette is pushed in more forcefully than necessary, the spring stretches to prevent the transmission mechanism from being destroyed, but the cassette must be inserted while being pushed slowly and gently.

This is fine as long as you insert the cassette twice a day, but it has the drawback that it is very difficult to use for people who insert the cassette many times a day.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cassette loading device that eliminates the drawbacks of the prior art and allows a quick cassette insertion operation while taking advantage of the fact that the cassette will not break even if it is pushed in with a strong force.

(Means for Solving the Problems) The automatic cassette loading device for a magnetic recording and reproducing device of the present invention is a magnetic recording and reproducing device having a mechanism for automatically loading a cassette inserted by a user into a predetermined position. A part of the coupling mechanism for transmitting power from the motor that drives the mechanism to the cassette holder that holds and transports the cassette has the following configuration.

(1) Lever A to which the rotational force of the motor is transmitted through the reduction mechanism.

(2) Lever B is connected to a mechanism that directly drives the cassette holder and performs linear or rotational movement similar to lever A.

(3) A spring with both ends fixed to lever A and lever B.

(4) What is Lever A and Lever B? When the motor rotates in the direction of loading the cassette, the driving force of lever A is directly transmitted to lever B, and when the motor rotates in the direction of ejecting the cassette, the driving force of lever A is driven. The force is transmitted to lever B via the spring.

(5) A directional damper installed on lever A, whose input/output part is engaged with lever B, and when lever A separates from lever B, a small load is generated, causing lever A to Damper that produces a large load when lever B approaches (action) With the above configuration, the damper produces only a small load when lever B moves away from lever A, so even if you push in with more force than necessary when inserting the cassette, the spring will not release. This prevents the material from stretching and damaging the mechanism.

As described above, the present invention makes full use of the features of the conventional example, and further uses the above means.When lever B approaches lever A, the damper generates a large load, so the cassette is inserted and the switch is turned on. Even if you release your hand immediately afterwards, lever B does not suddenly return to the direction of lever A.

Therefore, even if the motor starts rotating and lever A starts moving in direction a, and lever B is pulled by the spring and collides with it, the cassette will not move away from the cassette stopper because the speed is slow. Because loading is done in this state.

The cassette will be installed in the correct position of the magnetic recording/reproducing device.

(Example) An example of the present invention will be described based on FIGS. 1 to 5. FIG. 1 is a perspective view of the automatic cassette loading device of the magnetic recording/reproducing apparatus of the present invention, FIG. 2 is a diagram of the same operation, FIG. 3 is a plan view before the cassette is inserted, and FIG. 4 is a plan view after the cassette is loaded. FIG. 5 is a diagram of the same parts.

In the same figure, 1 is lever A, 2 is a damper unit,
3 is lever B, 4 is rack gear, 6 is input/output gear, 7
8 is a switch, 8 is a spring, 9 is a cassette holder guide, and 10 is a guide groove of the cassette holder guide 9. In addition, 11 is a wiper arm, 12 is a cassette holder, 1
3 is a protrusion of the cassette holder I2, 14 is a cassette, 15
The cassette stopper 16 is a chassis, 17 is a drive gear, 18 is a reel table, 19 is a cylinder, 20 is a cut-out portion of lever B, and 21 is a motor.

Damper unit 2 is installed on lever A1, and lever B
3 is provided so as to be movable in the same direction as the lever A1, and a rack gear 4 is provided at one end thereof, and meshes with the input/output portion gear 6 of the damper unit 2.

The damper unit 2 is configured so that when its input/output gear 6 rotates in the g direction, a small load is generated, and when it rotates in the h direction, a large load is generated.

In this embodiment, when inserting a cassette, there is no need to worry about the insertion force or insertion speed, and as long as the cassette is pushed in until the switch 7 is turned on, it will be loaded securely, so there is no need to worry about the timing of releasing the cassette. There's no need. Furthermore, even if the cassette is pushed in more than necessary, the spring 8 expands and absorbs the extra stroke, so there is no need to worry about how much the cassette is pushed in.

(Effect of the invention) According to the invention, the insertion force during insertion of the cassette.

The cassette can be inserted without worrying about the amount of insertion and the timing of insertion, and incomplete mounting of the cassette due to misalignment of the cassette from the cassette holder can be prevented, which has great practical effects.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an automatic cassette loading device for a magnetic recording/reproducing device according to an embodiment of the present invention, and FIGS. 2(a) to (d)
is a diagram of the same operation, Figure 3 is a plan view before inserting the same cassette, and Figure 4 is a diagram of the same operation.
The figure is a plan view after inserting the same cassette, Figure 5 is a diagram of the same parts,
FIG. 6 is a perspective view of a conventional automatic cassette loading device, and FIGS. 7(a) to 7(d) are views of the same operation. 1... Lever A, 2... Damper unit,
3... Lever B, 4... Rack gear, 6
...Input/output gear, 7...Switch, 8...
・Spring, 9...Cassette holder guide, 10・
...Guide groove, 11...Wiper arm, 12...Cassette holder, 13...Protrusion, 14...Cassette,
15...Cassette stopper, 16...Chassis, 17...Drive gear. 18... Reel table, 19... Cylinder, 20
... cut and raised portion, 21 ... motor. Patent applicant: Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Scope of Claims] A magnetic recording and reproducing device having a mechanism for automatically loading a cassette inserted by a user into a predetermined position, the magnetic recording and reproducing device comprising: a motor driving the loading mechanism;
An automatic cassette loading device for a magnetic recording/reproducing device, in which a part of a connecting mechanism for transmitting power to a cassette holder for holding and transporting a cassette has the following configuration. (1) Lever A to which the rotational force of the motor is transmitted through the reduction mechanism. (2) Lever B is connected to a mechanism that directly drives the cassette holder and performs linear or rotational movement similar to lever A. (3) A spring with both ends fixed to lever A and lever B. (4) Lever A and lever B are such that when the motor rotates the cassette in the loading direction, the driving force of the lever A is directly transmitted to the lever B, and when the motor rotates in the cassette ejecting direction. The driving force of the lever A is transmitted to the lever B via the spring. (5) A directional damper provided on the lever A, the input part of the damper is engaged with the lever B, and when the lever A leaves the lever B, a small load is applied. damper that generates a large load when lever A approaches lever B.