JPH04120999U - Keyboard device for electronic musical instruments - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to obtain a let-off feeling with soft hits and a touch similar to that of an acoustic piano with a feeling of mass, and to provide a conventional keyboard switch having a first switch section and a second switch section. To provide a keyboard device for an electronic piano as an electronic musical instrument, which has a stable sound volume even when used, provides repeated hitting performance similar to that of a piano, and can be pressed and played. [Structure] A jack 3 is rotatably supported on the key 1 by a shaft 4, and a hammer 7, which is a mass body, is supported on the keyboard chassis 2 by a shaft 11.
When the key 1 is pressed down, the jack 3 descends, and when it has descended a predetermined distance, the rotating part 10 contacts the cushion part 9 and rotates, and the hammer contact part of the jack 3 8 is removed from the hammer 7, and the actuator 6 of the jack 3 operates the first and second switch parts of the keyboard switch 5.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a keyboard device for an electronic musical instrument, mainly an electronic piano.

0002

[Conventional technology]

As shown in Fig. 3, the conventional electronic piano has a hammer b that presses against the rear end of the key a. It is rotated against the spring c, and the actuator d attached to the key a is used to turn the keyboard switch e. Activate the 1st contact and the 2nd contact sequentially, and the time from the activation of the 1st contact to the activation of the 2nd contact. It is configured to produce sound at a volume appropriate for the interval.

0003

[Problem that the idea aims to solve]

According to the configuration of the conventional electronic piano described above, the keyboard switch at the tip of the key is The difference in the key stroke when the first contact and the second contact operate is due to the manufacturing error of the keyboard switch. Therefore, if you try to stabilize the volume, you will not be able to narrow it down beyond a certain level, and if you try to stabilize the volume, This may result in deterioration of the repeated hitting characteristics, or may cause problems such as pressing while playing the piano. In other words, it is difficult to press a key halfway and then press it to produce a sound. There was a problem. The purpose of this invention is to solve the above-mentioned problems of conventional keyboard switches. It is something.

0004

[Means to solve the problem]

In order to achieve the above-mentioned purpose, the present invention has been developed by pressing the key a predetermined amount and then pressing it further. When the jack rotates due to the force transmitted from the key, and the force transmitted from the rotating jack In a keyboard device for an electronic musical instrument equipped with a hammer that rotates by a force applied to the The jack is equipped with an actuator that operates the keyboard switch, and the jack is equipped with an actuator that operates the keyboard switch. The actuator then operates the first switch section and the second switch of the keyboard switch. The parts are operated in sequence.

[0005]

[Effect]

If you press the key a predetermined amount and then press it again, the jack will respond to the force transmitted from the key. This rotation causes the actuator installed in the jack to turn the keyboard switch. The first switch section and the second switch section are operated in sequence. The movement of this actuator is large compared to the movement of the keys, so even when using conventional keyboard switches, the volume The first switch part and the second switch of the keyboard switch are more stable than the conventional one. The difference in key strokes between the two parts can be significantly narrowed. Therefore, pi You can get the same repeated hits as that, and you can press and play.

[0006]

【Example】

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an embodiment of the present invention. In the figure, 1 is a key (white key) rotatably locked to the keyboard chassis 2. The key 1 is formed in a U-shaped cross section with the lower part open, and a jack 3 is provided in the inner cavity. is rotatably supported on a shaft 4. Jack 3 has one end on keyboard chassis 2. An actuator 6 is formed to operate a keyboard switch 5 provided at the A hammer contact portion 8 that contacts the hammer 7 is formed, and a keyboard chassis is formed in the middle of the hammer contact portion 8. A rotating part 10 is formed which contacts the cushion part 9 of 2 and rotates the jack 3. Ru. The hammer 7 is a mass arm having a shape as shown in FIG. A recess fits into a shaft 11 fixed to the chassis 2 and is rotatably supported. It has a weight 12 at the bottom, and the left end is normally lowered and comes into contact with the cushion stopper 13. . A plate spring 14 is stretched between the hammer 7 and the jack 3, and the elastic force of the plate spring 14 is Due to force, the hammer contact part 8 of the jack 3 contacts the jack of the hammer 7 when the key is released. It is adapted to engage with the portion 15. The keyboard switch 5 is, for example, a rubber switch. Well-known devices such as photoelectric switches and leaf spring switches are used, and the actuator 6 It has a first switch part and a second switch part (not shown) that are activated sequentially when the button is pressed. do. Next, to explain the operation of this embodiment, when key 1 in FIG. 1 is pressed, jack 3 rotates the hammer 7 while descending, and the rotating part 10 contacts the cushion stopper 9. Then, it rotates and the hammer contact part 8 comes off from the jack contact part 15 of the hammer 7. .

[0007] Hammer 7 continues to rotate due to inertia even after being removed from jack 3, and then reverses due to gravity. rotate in the direction. In this way, the player's fingers can get a let-off feeling with a weak hit, and the You can also get a touch similar to that of an acoustic piano with a sense of mass. Hold key 1 at a specified distance When the jack 3 rotates after being released and pressed down, the keyboard switch 5 engages the actuator of the jack 3. Operates on Eta 6. The first switch section and the second switch section of this keyboard switch 5 Actuation occurs sequentially with slight differences in strokes of the key 1. The first switch section and the second switch section When the switch section is actuated, a well-known circuit causes the operation of the first switch section to switch to the second switch section. A musical tone is generated from the speaker at a volume corresponding to the time until the switch is activated.

[0008]

[Effect of the idea]

Since the present invention is configured as described above, it is possible to obtain a let-off feeling with a weak hit. You can get a touch similar to that of an acoustic piano with a sense of mass, and the first Using a conventional keyboard switch having a switch section and a second switch section, the first The difference in key strokes between the switch part and the second switch part is adjusted to stabilize the volume. Even when set to It has the effect of

[Brief explanation of drawings]

[Figure 1] Partially cutaway side view of one embodiment of the present invention

[Figure 2] Perspective view of the hammer of the above embodiment

[Figure 3] Side view of a conventional electronic piano

[Explanation of symbols]

1 Key 2 Keyboard chassis 3
Jack 5 Keyboard switch 6 Actuator 7
Hammer 8 Hammer contact part 10 Rotating part 14
Leaf spring 15 Jack contact part

Claims (1)

[Scope of utility model registration request] [Claim 1] A keyboard for an electronic musical instrument, comprising a jack that rotates by the force transmitted from the key when the key is pressed further after a predetermined amount of depression, and a hammer that rotates by the force transmitted from the rotating jack. In the keyboard device for an electronic musical instrument, the jack includes an actuator that operates a keyboard switch, and when the jack rotates, the actuator sequentially operates a first switch section and a second switch section of the keyboard switch. .