JPS58232Y2 - Double touch key device in electronic organ - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a double touch key device in an electronic organ.

As a device of this kind, the applicant of the present invention has previously provided a spring plate with an arcuate cross section on the lower surface of each key, supported by spacers at both ends, and the spring plate is bent by strong pressure following the first downward movement of the key. The first downward movement activates the normal first key switch, and the second downward movement activates the second key switch that provides a special musical effect. proposed (Jet No. 51-143078
issue).

The present invention eliminates the plurality of spring plates in such a device and uses one or several spring plates for a plurality of keys, and the spring plates are bent by the same second downward force of each key to actuate the second key switch. The purpose is to provide a plurality of keys 1 with a first key switch 2 that operates in conjunction with the first downward movement associated with the pressing of the key switch 2, and a second key switch 2 that operates in conjunction with the first downward movement that occurs when the key is pressed.
In a type in which a second key switch 3 is provided which operates in conjunction with the downward movement, the rail is attached between the tips of a pair of swinging arms 5 and 6 which are pivotally supported on the chassis 4 at the root end over the lower surface of a plurality of keys 1. 7 is horizontally installed, and a spring plate 10 having an arcuate cross section is horizontally installed between a pair of spacers 8 and 9 provided on the chassis 4 on the lower surface of the rail 7, The spring plate 10 is bent by two downward movements.

In FIGS. 1 and 2, the rail 7 is made of an inverted profile, and is attached to the tips of the swinging arms 5 and 6 at both ends of its vertical portion, and the lower end of the vertical portion is placed on the middle of the spring plate 10. It was to so.

Then, the buffer members 11 were attached to the upper and lower surfaces of the horizontal portion.

12 is a balance pin, 13 is a coil spring that pulls the root end of the key 1 downward, and 14 is a guide pin.

Thus, the first downward movement of pressing down each key 1 with normal force closes the first key switch 2 and produces a normal musical tone.

Subsequently, in the second downward movement to apply further load, the spring plate 10 is bent in the middle via the rail 7, and the second key switch 3 is closed.
For example, a vibrato effect, an attack effect, etc. are added.

The relationship between the load applied to the key and the stroke of the key is shown by curve A in FIG.

In the figure, curve B shows when the load is removed.

What is clear from FIG. 3 is that the load increases during the second downward movement, and when it reaches a certain point P, the load suddenly decreases, so that the second downward movement can be clearly sensed.

In this way, according to the present invention, one spring plate can be used in common for a plurality of keys, and a load can be applied to the spring plate via the rail provided on the pair of swing arms. Therefore, the load applied to each key is equal, and there is an effect that variations do not occur as would be the case when individual spring plates are provided.

[Brief explanation of the drawing]

FIG. 1 is a cutaway side view of one embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a characteristic diagram thereof, and FIG. 4 is a perspective view of a spring plate. 1...Key, 2...1st key switch, 3...2nd key switch, 4...chassis, 5, 6...rock Moving arm, 7...Rail, 8, 9...Spacer, 10...
Spring plate.

Claims (1)

[Scope of utility model registration request] A type in which a plurality of keys are provided with a first key switch that operates in conjunction with the first downward movement associated with each press of the key, and a second key switch that operates in conjunction with the second downward movement that follows the first downward movement. In a device, a rail is horizontally installed between the tips of a pair of swinging arms whose root ends are pivotally supported on the chassis across the bottom surface of a plurality of keys, and a rail is installed between a pair of spacers provided on the chassis on the bottom surface of the rail. A double-touch key device for an electronic organ in which a spring plate having an arcuate cross section is installed horizontally, and the spring plate is bent by the second downward movement of each key following the first downward movement.