JPH068632Y2 - Electronic musical instrument keyboard device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a keyboard device for electronic musical instruments such as an electronic piano and an electronic organ.

(Prior Art) Conventionally, as a keyboard device of this type, as shown in FIG. 1, a keyboard chassis b is attached on a wooden shelf board a, and a reed center d is attached to the chassis b via a reed c. Of the key f is swingably supported by the fulcrum e of the lever f, and the swinging of the key f is performed by a returning means k composed of a lever h, a lever weight i, and a spring j that oscillates around the lever fulcrum g behind the key f. A screw-shaped actuator l is screwed in front of the fulcrum e of the key f, and a switch m attached to the reed c for activating the sounding is attached to the key f by swinging the key f. It has been known.

The actuator l is provided so as to penetrate from the lower surface to the upper surface of the key f as shown in the first drawing, and is also mounted so as to be screwed from the lower surface of the key f to the middle and not penetrate to the upper surface. There is.

(Problems to be solved by the invention) The timing at which the switch m, which starts sounding when the key f swings, operates depending on the assembly precision of the keyboard instrument and changes in the environment, especially when the key f is made of wood. easy. Therefore, the screwed actuator 1 is rotated from the upper surface or the lower surface of the key f to adjust the timing.

However, when the actuator 1 is provided penetrating the key f as shown in the first illustration, the actuator l has to be provided in the range of L toward the rear of the key f so as not to damage the surface of the key f, and adjustment is necessary. In this case, since the actuator 1 can be moved only by a minute adjustment distance, there is a drawback that adjustment is difficult.

Further, if the actuator 1 is screwed so as not to penetrate from the lower surface to the upper surface of the key f, the above-mentioned drawback can be solved,
In order to adjust the actuator l, the key f has to be disassembled and removed from the device and adjusted from the bottom side, which makes the adjustment extremely troublesome.

An object of the present invention is to provide a keyboard device for an electronic musical instrument, which solves such drawbacks and the like and is easy to adjust.

(Means for Solving the Problem) According to the present invention, a key that is swingably supported by a fulcrum on a keyboard chassis of an electronic musical instrument and that is oscillated by a return means is provided in front of the fulcrum of the key. A screw-type actuator screwed on the switch operates a switch provided on the keyboard chassis to start sounding when the key swings, and a lateral actuator adjustment window is formed on the key. The above-mentioned object is achieved by providing an adjusting engagement portion at the tip of the actuator and exposing the tip of the actuator from the lower part of the key to the actuator adjustment window and screwing the actuator.

(Operation) The key is swung about the fulcrum on the keyboard chassis, and the swing is returned by the returning means as in the conventional one, and the actuator mounted on the key is accompanied by the swing. The sound generation start switch is operated in the same manner as the conventional one, but if the operation timing of the switch is misaligned due to assembly accuracy, environmental changes, etc., lift the key and adjust the actuator on the side. The actuator can be adjusted by inserting, for example, a wrench through the window and engaging the adjustment engaging portion at the tip of the actuator. In addition, since the actuator can be provided at a position far away from the fulcrum of the key, the actuator can be turned largely and the adjustment can be performed, which facilitates the adjustment.

(Embodiment) An embodiment of the present invention will be described with reference to FIG. 2 in the drawing. In the figure, reference numeral (1) is a keyboard chassis of an electronic musical instrument, and (2) is a reed ( 3) A wooden key swingably supported at the upper fulcrum (4), (5) is a returning means for returning the swing of the key (2), and (6) is a fulcrum of the key (2) ( 4) A screw type actuator screwed to the front, (7) indicates a switch provided on the keyboard chassis (1) for determining the start of sound generation, and the key (2) is pushed in front of the key (2) to swing. Then, the actuator (6) pushes the switch (7) to start sounding. The return means (5) is a lever fulcrum supported by the chassis (1).
(8) A swingable lever (9), a lever weight (10) and a spring (11), and the tip of the lever (9) presses the rear end of the key (2). The lock return force of the key (2) is given by.

In the present invention, a lateral actuator adjustment window (12) is formed in the key (2), and the tip of the actuator (6) is provided with the above-mentioned structure including the conventional one shown in FIG. The adjustment engaging portion (1) as shown in FIGS. 4 (A) (B) (C)
3) is provided, the actuator (6) is screwed from the lower part of the key (2), and the tip end is exposed to the actuator adjustment window (12) so that the actuator (6) can be easily adjusted. I chose

To further explain this, the actuator adjustment window (12) is placed at a position sufficiently distant from the fulcrum of the key (2) as shown in FIG.
(2) is formed so as to penetrate in the lateral direction, and the actuator (6) is provided by screwing it from directly below the window (12), and the actuator (6)
The switch (7) is arranged so that it is located directly below.

In Fig. 2, (14) is a front pin fixed to the reed (15),
(16) shows a balance pin fixed to the front of the reed (3), (17) shows a key stopper, (18) shows a lever stopper cushion, (19) shows a felt, and (20) shows a key retainer. Further, (21) is a key weight embedded for adjusting the inertia of the key (2).

When the timing of the operation of the switch (7) that determines the start of sounding is misaligned due to changes in the assembly accuracy of the keyboard device, changes in the environment, etc., the key (2) is lifted as shown in FIG. Actuator adjustment window (12) above surface
Appears, the hexagon wrench is inserted into the window (12), the actuator (6) is rotated, and the protrusion distance of the actuator (6) from the key (2) is adjusted to adjust the timing. The actuator adjusting window (12) can be formed sufficiently in front of the fulcrum (4) without impairing the appearance of the key (2), and the actuator (6) provided there can be turned largely for adjustment. Can be adjusted.

The adjusting engagement portion (13) of the actuator (6) is shown in FIG.
A hexagonal hole (13a) that engages a hexagonal wrench (22) as shown in (A), a round hole (13b) that engages with a shaft (23) as shown in FIG. 4B, or FIG.
As shown in (C), it can be constituted by a gear (13c) or the like that engages with the rack rod (24).

(Effects of the Invention) As described above, according to the present invention, the key of the electronic musical instrument is provided with the lateral actuator adjusting window, and the actuator is screwed to the adjusting engaging portion of the tip end of the actuator adjusting window. Since it is possible to adjust the actuator simply by lifting the key, and the actuator can be installed by separating it from the fulcrum of the key to the front, it is possible to adjust the actuator by turning it a lot. There is an effect such as.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a keyboard device of a conventional electronic musical instrument,
2 is a partially cutaway side view of an embodiment of the present invention, FIG. 3 is a sectional view taken along the line III-III of FIG. 2, and FIGS. 4 (A) (B) (C) are perspective views of an actuator. FIG. 5 is an explanatory diagram of the adjustment state. (1) …… Keyboard chassis, (2) …… Key (4) …… Support point, (5) …… Return means (6) …… Actuator, (7) …… Switch (12) …… Actuator adjustment window ( 13) ... Engagement part for adjustment

Claims (2)

[Scope of utility model registration request] 1. A screw-type actuator provided with a key swingably supported by a fulcrum on a keyboard chassis of an electronic musical instrument and whose swing is returned by a returning means, and screwed in front of the fulcrum of the key. In which a switch for deciding the start of sounding provided on the keyboard chassis is operated by swinging the key, a lateral actuator adjustment window is formed in the key, and an adjustment member is provided at the tip of the actuator. A keyboard device for an electronic musical instrument, characterized in that a joint portion is provided, and the actuator is screwed with the tip portion exposed from the lower portion of the key to the actuator adjustment window. 2. The keyboard device for an electronic musical instrument according to claim 1, wherein a square hole is formed in a front end surface of the screw-shaped actuator to serve as an adjustment engaging portion.