JPS623832Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an operating device for an electric piano or the like.

As shown in FIG. 1 as an example, in a conventional electric piano, when a keyboard lid 1 is opened, a keyboard 2 is exposed.
Furthermore, the keyboard 2 is configured such that claps 3 and 4 are exposed on both sides thereof, and a keyboard presser 5 is exposed above the keyboard 2. However, in the case of this type of conventional electric piano, for example, a power switch 6 is built into the right-hand clapper 3, and operation knobs 7 for volume, bass, treble, tremolo, etc. are built into the left-hand clapper 4. Therefore, when the keyboard cover 1 is opened, the power switch 6
and operation knob 7... are also exposed, so the keyboard lid 1
When opened, it is obvious at first glance that it is an electric piano, and its appearance differs from that of a normal piano, and depending on how you look at it, it lacks a sense of luxury, and the power switch 6 and control knobs 7... may interfere with playing. There is also a power switch 6 on the clapboards 3 and 4 and an operation knob 7...
...is incorporated, so these clapboards 3 and 4
had to be larger than the claps of a normal piano, and as a result, if the number of keys were the same, the frontage would have to be larger, making the overall size larger.

This idea was made in view of the above circumstances,
The appearance when the keyboard lid is open can be made almost the same as a normal piano, the operation knobs do not get in the way of playing, and the frontage can be made almost the same as a normal piano, making the overall size reasonable. It is an object of the present invention to provide an operating device for an electric piano that can be downsized, and in which the operating knob can be located at a location where it is easy to operate, and the operating knob etc. can be arranged in a space-efficient manner. A cover is provided on the keyboard holder so as to be rotatable about a center line extending in the length direction of the keyboard holder,
An operating knob is attached to the back surface of the cover, and the operating knob is configured to be selectively switched between an exposed state and a non-exposed state by rotating the cover when the keyboard lid is open. It is what it is.

An embodiment of this invention will be described below with reference to FIGS. 2 to 7. Note that the first
Parts with the same names as those in the conventional example shown in the figure are given the same reference numerals, and their explanations will be omitted. Mounting plates 13 are fitted with screws 1 at four predetermined locations on the back of the keyboard holder 5.
It is attached by 4. Furthermore, rectangular windows 15 are formed on both sides of the keyboard holder 5, and elongated holes 16 are formed on the outside of these windows 15, respectively. The four mounting plates 13 are provided on both sides of the two windows 15, respectively. Each of the two mounting plates 13 is symmetrically provided with parts as will be described later, so only one of them will be described below. A substantially triangular rotating plate 18 is attached to the leftmost mounting plate 13 via a shaft 17.
is rotatably mounted. This rotating plate 1
8 is partially passed through a window 19 formed at a predetermined position of the mounting plate 13, and an operating lever 20 is attached to a predetermined position of this penetrating portion. The operating lever 20 is passed through the elongated hole 16 of the keyboard holder 5 and protrudes appropriately to the outside. Circular holes 21a and 21b are formed at two predetermined locations on the rotating plate 18, respectively. Further, a circular hole 22 is formed at a predetermined position of the mounting plate 13 corresponding to the circular holes 21a and 21b. The ball 23 fitted into the circular hole 22 is urged in a predetermined direction by the plate spring 24 and engaged with either of the circular holes 21a, 21b of the rotating plate 18, thereby causing the The rotating plate 18 is configured to be locked at a predetermined rotating position as described later. Further, an arc-shaped window 25 is formed at a predetermined position of the rotating plate 18, and a tooth portion 26 is formed on the outer peripheral wall surface of this window 25.

One shaft 28 of a rotating body 27 is rotatably supported at a predetermined position on the leftmost mounting plate 13, and the other shaft (not shown) is rotatably supported by an inner mounting plate (not shown). Possibly supported. A cover 29 is attached to one side of the rotating body 27, and a control panel 30 is attached to the other side. The control panel 30 is equipped with operation knobs 31 for volume, bass, treble, etc., for example. Note that other operation knobs such as a tremolo and a power switch are arranged on the right side, and detailed explanation thereof will be omitted. A gear portion 32 is provided at the tip of one shaft 28 of the rotating body 27,
This gear portion 32 is meshed with the tooth portion 26 of the rotating plate 18.

Note that when the operating lever 20 is located above the elongated hole 16 as shown in FIG.
are engaged and locked in this position, and as shown in FIG. 5, the rotating body 27 is in a position where its cover 29 closes the window 15 of the keyboard holder 5.

When the operating lever 20 is pushed down to reach the lower part of the elongated hole 16 as shown in FIG. 3, the rotating plate 18 rotates clockwise in FIG. When the ball 23 reaches the engaging position, it is locked at that position, and accordingly, the rotational force of the rotating plate 18 is transmitted via the tooth portion 26, the gear portion 32, etc., and the rotating body 27 is moved to the position shown in FIG. The control panel 30 is rotated approximately 180 degrees in a clockwise direction until it reaches a position where the control panel 30 closes the window 15 of the keyboard presser 5, as shown in FIGS. reach the protruding position.

Next, when the operating lever 20 is pushed up to reach the upper part of the elongated hole 16 as shown in FIG. 2, the rotating plate 18 rotates counterclockwise in FIG. The ball 23 reaches a position where it engages and is locked at that position, and the rotational force of the rotating plate 18 is transmitted via the teeth 26, the gear 32, etc., and the rotating body 27 is moved to the seventh position. The cover 29 is rotated approximately 180 degrees counterclockwise in the figure until it reaches a position where the cover 29 closes the window 15 of the keyboard presser 5, as shown in FIGS. Reach the hidden position at the back.

In this way, by operating the operating lever 20, the operating knob 31 can be selectively switched between a state where it is exposed to the front side of the keyboard presser 5 and a state where it is not exposed, and moreover, the operating knob 31 is exposed. When the cover 29 is not opened, the window 15 of the keyboard presser 5 can be covered with the cover 29, as shown in FIG. 2, so that the appearance is not spoiled.

In addition, by changing the gear mechanism in the above embodiment,
A configuration may be adopted in which the rotating body 27 can be rotated by operating the operating lever 20 in the left-right direction in the same manner as in the above embodiment.

As explained in detail above, according to this invention, a rotatable cover is provided on the keyboard holder, and an operation knob is attached to this cover, and when the keyboard lid is opened, the cover is rotated to Since the operating knob is configured so that it can be selectively switched between an exposed state and a non-exposed state, the operating knob can be hidden from view when the keyboard lid is open, and therefore the keyboard lid can be The appearance in the open state is almost the same as that of a normal piano, the power switch and control knobs do not get in the way of playing, and the clapboards on both sides of the keyboard are similar to those of a normal piano. It can be made into the same shape, so the frontage dimensions can be made almost the same as a normal piano,
As a result, effects such as the ability to reasonably reduce the overall size can be obtained. In addition, when the operating knob is exposed, it can be exposed at a position where it is easy to operate, and the cover and operating knob can be arranged in a narrow space, making the entire device compact. Effects such as this can be obtained.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view showing an example of a conventional electric piano, Fig. 2 is a perspective view of essential parts showing an example of an operating device for an electric piano according to this invention, and Fig. 3 shows an exposed operating knob. FIG. 4 is a partially omitted vertical sectional side view taken along the - line in FIG. 2, and FIG. 5 is a partially omitted vertical sectional side view taken along the - line in FIG. Figure 6 is the − of Figure 4.
FIG. 7 is a cross-sectional plan view taken along a line, and FIG. 7 is a vertical side view similar to FIG. 5, showing a state in which the operating knob is exposed. 1...Keyboard lid, 2...Keyboard, 3, 4...Clapboard, 5...Keyboard press, 13...Mounting plate, 15...
Window, 18... Rotating plate, 20... Operating lever, 27
... Rotating body, 29 ... Cover, 30 ... Control panel, 31 ... Operation knob.

Claims (1)

[Scope of utility model registration request] In an electric piano in which the keyboard and the keyboard presser are exposed by opening the keyboard lid,
A cover is provided on the keyboard holder so as to be rotatable about a center line extending in the length direction of the keyboard holder, an operating knob is attached to the back of the cover, and the cover is rotated when the keyboard lid is opened. 1. An operating device for an electric piano, characterized in that the operating device is configured to selectively switch between a state in which the operating knob is exposed and a state in which the operating knob is not exposed by moving the operating knob.