JPH063437Y2 - Electronic musical instrument storage lid opening and closing device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a storage lid opening / closing device for an electronic musical instrument.

2. Description of the Related Art With the easy play of electronic musical instruments, an electronic musical instrument main body is provided with an openable / closable storage lid that allows an external storage device such as a ROM pack or a floppy disk to be attached / detached. When using the external storage device, open the storage lid. It is attached and the storage lid is closed when not in use.

As shown in FIG. 11, the conventional storage lid opening / closing device has a rear portion of the storage lid 1 locked to the chassis 2, and the chassis 2 is always rotatable in the opening direction by a spring 5 with a fulcrum portion 2a as a fulcrum. It is biased and its rotation is restricted by a stopper 4 provided on the lower front surface of the storage lid 1.

A stopper releasing mechanism 3 for releasing the stopper 4 is provided above the stopper 4, and the stopper releasing mechanism 3 is provided.
By pushing down, the stopper 4 is rotated to release the lock and open the storage lid 1. An external storage device 11, such as a ROM pack or a floppy disk, can be inserted or removed from the front of the storage lid 1 when the storage lid 1 is open. When the storage lid 1 is closed (when the storage device 11 is not used), the storage lid 1 is pushed by hand and the storage lid 1 is stopped by the stopper 4.
It is configured to be fixed with.

The problem to be solved by the invention is that in such a structure, the opening and closing of the storage lid 1 relies on human hands, which lowers the added value in products such as electronic musical instruments. Will also be damaged. Further, the storage lid 1 suddenly opened due to the variation in strength of the spring 5, and an extra force was required when closing the lid, and the operation feeling was not good.

The present invention solves the above-mentioned drawbacks of the related art, and provides a storage lid opening / closing device for an electronic musical instrument in which the storage lid can be opened and closed automatically and smoothly by operating one switch.

Means for Solving the Problems The present invention is directed to a chassis having a storage lid and having a rear end pivotally supported so as to be openable and closable, a motor for rotating the chassis, a cam and a cam locked to the motor. It is provided with an opening / closing detection switch that is interlocked with the rotation of the motor and a motor start switch.

Action With the above configuration, when the start switch is turned on, the motor is activated and the chassis is rotated. By automatically stopping the motor when the opening / closing detection switch detects a certain opening / closing angle, the storage lid can be automatically opened / closed by only pressing the switch.

Embodiment FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a perspective view of an electronic musical instrument equipped with this embodiment. The same members as those in the conventional example are designated by the same reference numerals. 2 is a chassis, which is a fulcrum portion 2a
Is rotatably supported by the panel body. A motor 8 is located below the shaft, and a cam 7 is attached to the shaft of the motor. The cam 7 has switch operating grooves 7b formed at two positions on its circumference (opposite to 180 degrees in the present embodiment). Reference numeral 7a is a guide pin implanted in the cam 7, and the guide pin 7a is fitted into a long guide groove of the chassis 2. Reference numeral 9 denotes an open / close detection switch having one circuit and two contacts, the actuator of which is in sliding contact with the side peripheral surface of the cam 7. Reference numeral 6 is a motor start switch that is turned on when pressed.

FIG. 3 is a perspective view of a main part when the storage lid 1 is closed, and FIG. 4 is a perspective view of a main part when the storage lid 1 is open. Motor 8
And the cam 7 locked to this is provided inside the chassis 2, and the guide pin 2a fixed to the cam 7 is engaged with the guide groove 2b provided in the chassis 2. The guide pin 7a moves with the rotation of the guide groove 2
The chassis 2 is rotated while sliding in b.

The operation of the opening / closing mechanism will be described with reference to FIGS. 5 to 10. FIG. 9 is a circuit diagram showing a state in which the sweater 8 is not driven, and the contacts of the open / close detection switch 9 are not connected to the power supply 10. Therefore, the storage lid 1 is in the open state or the closed state. This is shown in Figs. 5 and 7.
As shown in the figure, this is a case where the actuator 9a is fitted in the switch operating groove 7b of the cam 7, the open / close detection switch 9 is in the off state, and the motor 8 is not energized. Therefore, the storage lid 1 is in the closed state in FIG. 5 and in the open state in FIG.

The circuit diagram of FIG. 10 is a diagram showing a state where the motor 8 is being driven. The switch 6 is a starting switch whose contacts are closed only when the switch button is pressed. When the starting switch 6 is pressed in the motor stopped state of FIG. 9, the contacts 6a and 6
Since b is connected, the motor 8 is connected to the power source 10 and started. The start switch 6 is turned off by releasing it, but since the cam 7 is already rotating, the contacts 9c and 9d of the open / close detection switch 9 are connected. That is, as shown in FIGS. 6 and 8, the cam 7 is rotated by the start of the motor 8 and the actuator 9a is separated from the switch operating groove 7b to separate the cam 7 from the cam 7a.
Since it slides on the circumference of, the open / close detection switch 9 is turned on. Therefore, the storage lid 1 is in the open state in FIG. 6 and is in the closed state in FIG. Thus, the storage lid is opened once and closed once in the order of FIG. 5, FIG. 6, FIG. 7, and FIG.

As described above, according to the present invention, by combining the storage lid opening / closing mechanism with the cam and the state detection and the start switch by the cam surface, the storage lid is automatically and smoothly fixed only by operating the start switch. Since it can be opened and closed at the speed of, the operation feeling is significantly improved and the added value and quality of the electronic musical instrument are enhanced.

[Brief description of drawings]

FIG. 1 is a sectional view of a storage lid opening / closing device of the present invention, FIG. 2 is a perspective view of an electronic musical instrument having a storage lid opening / closing device, FIGS.
The figures are perspective views showing the main part of the embodiment, and FIGS. 5, 6, and 7.
FIGS. 8 and 9 are operation explanatory diagrams thereof, FIGS. 9 and 10 are circuit diagrams thereof, and FIG. 11 is a sectional view of a conventional example. 1 ... storage lid, 2 ... chassis, 2a ... fulcrum part, 2b
...... Guide groove, 6 …… Switch, 6a, 6b …… Contact,
7 ... Cam, 7a ... Guide pin, 7b ... Switch actuation groove, 8 ... Motor, 9 ... Open / close detection switch, 9a ...
... actuator.

Claims (1)

[Scope of utility model registration request] 1. A chassis, one end of which is pivotally supported by a panel, is configured to be openable / closable by a guide groove for opening / closing, and has a storage lid attached, and a motor for rotating the chassis.
An open / close detection switch having a cam attached to the motor shaft, having two switch operating grooves and guide pins engaging with the guide groove of the chassis, and an opening / closing detection switch having an actuator sliding on the circumference of the cam; And a start switch for starting the motor, the motor is started by turning on the start switch, and the motor is automatically stopped when the actuator enters the switch operation groove after the chassis is opened and closed by a certain angle. Storage lid opening and closing device for electronic musical instruments.