JP2597298Y2 - Keyboard structure of electronic musical instrument - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard structure, and more particularly to a structure of a tone control means in a keyboard of an electronic musical instrument.

[0002]

2. Description of the Related Art In an electronic musical instrument, a keyboard can be moved in a key arrangement direction (horizontal direction) in order to slightly change a pitch designated by a key-on signal due to a key depression of a keyboard. A keyboard structure to control the height has been implemented.

In a conventional keyboard structure capable of moving in the horizontal direction, a key guide to which each key is mounted is accommodated in a key frame and supported, and the entire key frame is configured to be movable with respect to the instrument body. The movement amount of the frame is detected, and the pitch is controlled based on the detection result.

[0004]

However, in the keyboard structure of the conventional electronic musical instrument, the entire key frame accommodating the key guide is moved relative to the main body of the musical instrument and detected. The moving mechanism must be moved with a large force, the stroke is large, and the structure of the moving mechanism is large and complicated.

In addition, since the key frame moves, the printed board on which the electronic control circuit and the like mounted on the key frame are mounted also moves at the same time. And a problem in durability.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and enables a keyboard to be moved and detected in a lateral direction with a simple structure, and to connect an electronic circuit mounted on a key frame. It is an object of the present invention to provide a keyboard structure of an electronic musical instrument that does not cause a problem to a part or the like.

[0007]

To achieve the above object, a keyboard device according to the present invention provides a keyboard structure of an electronic musical instrument having a key guide for mounting each key and a key frame for accommodating the key guide. The key frame is fixed to the instrument body side, the key guide is configured to be movable in the key arrangement direction, and a guide means common to a plurality of keys that guides the key guide linearly in the key arrangement direction. And a detecting means for continuously detecting the displacement of the key guide is provided on the key guide .
A control means is provided at a side end of the common portion provided with the common guide means, and controls the tone according to the detection result of the detection means.

[0008]

The key frame to which the printed board or the like is attached is fixed to the instrument body and does not move. A key or a key guide moves with respect to the fixed key frame, and the movement is detected by a detection means such as a pressure sensor, and a control means such as a microcomputer controls a musical tone based on the detection result.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory diagram of the keyboard structure of an electronic musical instrument according to an embodiment of the present invention. The keyboard 1 includes a key frame 2, a key guide 3, and a plurality of keys 4 mounted on the key guide 3 in parallel. The key frame 2 is fixed to a frame of a musical instrument body (not shown). The key guide 3 is configured to be movable left and right with respect to the fixed key frame 2 in the key arrangement direction as indicated by an arrow A. The key frame 2 is provided with a switch board for detecting key release of the key 4 or the like.

The mechanism for moving the key guide 3 is shown in FIG.
The guide rail 9 is provided on the key frame 2 as shown in FIG.
A guide groove 10 fitted to the guide rail 9 is provided on the lower surface of the key guide 3. The key guide 3 is slidable along the guide rail 9 of the key frame 2 with respect to the key frame 2 in the keyboard arrangement direction. The stopper 11 prevents the key guide 3 from coming off.

A key frame 2 is provided at both ends of the key guide 3.
And the pressure-sensitive sensor 5 is mounted between them. Each pressure sensor 5 is connected via an A / D converter 6 to a CPU 7 comprising a microcomputer or the like. The CPU 7 calculates the pitch,
A signal waveform of an electronic sound is created based on control signals of tone color, volume, and other various tone parameters, and is sent to the tone generator 8.

Next, the operation of the keyboard having the above configuration will be described. The key 4 of the keyboard 1 is pressed to specify the pitch.
This key depression operation is detected by key depression detection means (not shown), and the CPU 7 generates a key-on signal of the key. With the key 4 depressed, the key guide 3 is swung through the key 4 along the guide rail 9 (FIG. 2) of the key frame 2 in the keyboard arrangement direction as indicated by an arrow A (FIG. 1). . Due to the swinging operation of the key guide 3, the pressing force against the key frame at both ends thereof changes, and the pressure-sensitive sensor 5 detects the change in the pressing force, and a swing amount signal corresponding to the change amount (moving amount and moving speed). Is sent to the CPU 7. The CPU 7 corrects the pitch based on the key-on signal based on the swing amount signal, and
Send to The sound source circuit 8 creates an electronic sound having a corrected pitch and emits it from the sound system SS.

By the above operation, the pitch specified by the key depression can be slightly pitch-bend or vibrato.

The position of the pressure-sensitive sensor 5 is not limited to both ends of the key guide 3, but may be arranged at an appropriate intermediate position so that pressure can be detected between the key frame 3 and the key frame side member. Also, the number of pressure sensors 5 is not limited to two,
One or three or more may be used to improve detection reliability.

The means for detecting the amount of movement of the key guide 3 in the lateral direction is not limited to a pressure-sensitive sensor, but can detect the amount of movement of an electrical sensor, an optical sensor, a magnetic sensor, or the like by a resistance change in an analog manner. Any kind of sensor can be used. The control target by the lateral movement operation of the key guide 3 is not limited to the above-mentioned pitch, and the tremolo effect or the like can be obtained by controlling the volume. Also,
In addition to the pitch and volume, various musical tones such as tone, echo, reverb, and other effects can be controlled.

FIG. 3 is a block diagram of another embodiment of the present invention. In this embodiment, a pressure sensor 5 is provided for each key 4 mounted on the key support 12 of the key guide 3. The key guide 3 is fixed to a musical instrument main body (not shown) via a key frame. Each key 4 is swingable as shown by an arrow B in the arrangement direction of the keys 4 with respect to each support portion 12 of the fixed key guide 3. By depressing the key 4 with a finger and simultaneously swinging the key 4 in the horizontal direction as indicated by arrow B, the pressure-sensitive sensor 5 detects this movement and outputs a detection signal to the CPU. As in the case of the example, various musical sounds can be delicately controlled.

FIG. 4 shows preferred examples of key shapes suitable for use in the keyboard structure according to the present invention.
(A) is an example in which a plurality of grooves are formed on the upper surface of the key 4 on the key guide 3 along the longitudinal direction of the key. Instead of the groove, the key surface may be formed as a rough surface in an uneven shape. (B)
Is an example in which the key upper surface is formed in a convex shape. Also,
(C) is an example in which the upper surface of the key is formed in a concave shape. By using a key of such a shape, the force of the finger in the horizontal direction to the key is larger than that of the key on the flat upper surface, and the swing operation in the horizontal direction can be performed easily and reliably, and the operability is improved. Is achieved.

[0018]

As described above, in the present invention, a key frame on which a printed board or the like is mounted is fixed to the instrument body, and a key or a key guide is configured to be movable in a lateral direction with respect to the instrument body. Therefore, it is possible to achieve a keyboard structure that can be moved in the horizontal direction without increasing the stroke by a moving mechanism having a simple configuration. In addition, since the key frame has a fixed structure, the printed board and the like are also kept in a fixed state, preventing deterioration and damage of the connection parts of the circuit parts and the connection cables, and improving the function and connection reliability of the electronic parts for a long time. Can be kept.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a configuration of a keyboard structure of an electronic musical instrument according to the present invention.

FIG. 2 is a sectional view of the keyboard structure of FIG. 1;

FIG. 3 is a partial cross-sectional view of a keyboard structure according to another embodiment of the present invention.

FIGS. 4A, 4B, and 4C are explanatory views showing preferred examples of key shapes suitable for the keyboard structure according to the present invention.

[Explanation of symbols]

1 keyboard, 2 key frame, 3 key guide, 4
Key, 5 pressure sensor, 7 CPU, 8 sound source circuit

Claims (1)

(57) [Scope of request for utility model registration] In a keyboard structure of an electronic musical instrument having a key guide for mounting each key and a key frame for accommodating the key guide, the key frame is fixed to a musical instrument main body, and the key guide is arranged in a key arrangement. The key guide is shared with a plurality of keys linearly guided in the key arrangement direction.
Provided through the guide means, the common guide means of the detecting means for detecting the displacement of the key guides continuously key guides
A keyboard structure for an electronic musical instrument, comprising: a control means provided at a side end of the provided common portion to control a musical tone in accordance with a detection result of the detection means.