JP2550102Y2 - Electronic musical instrument keyboard device - 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 device for an electronic musical instrument such as an electronic piano and an electronic organ.

[0002]

2. Description of the Related Art Conventionally, as a keyboard device of this type, a reed b is provided on a metal keyboard chassis a integrally formed with an electronic musical instrument as shown in FIG. A pin c is provided to serve as a fulcrum f for swingably supporting a wooden white key d or a black key e. A cushion or the like is provided in front of the keyboard chassis a to restrict the downward swing of the keys d and e. There is known a device provided with a downward swing restricting means g, and an upward swing restricting means h behind the keyboard chassis a for restricting upward swinging of the key d and the like (actually disclosed in Japanese Unexamined Utility Model Publication No. 149990). The device shown in the figure is provided with a hammer i which is pushed up and rotates when the rear end swings upward above the rear portion of each key d and the like, and imparts inertial force to this when each key swings. I did it. j is a sound switch operated by being pressed by a key, and k is a bracket for mounting the lower limit stopper cushion 1 of the hammer i.

[0003]

In the above-described structure in which the entire key is mounted on a single integrated keyboard chassis a, the longer the key length, the larger the keyboard chassis a. There was a disadvantage that the weight was heavy and expensive. Attempts were also made to split the keyboard chassis into front and rear parts and attach them directly to the shelf of the musical instrument. However, there were disadvantages in that the assembly accuracy was poor and the strength was weak.

SUMMARY OF THE INVENTION An object of the present invention is to provide a keyboard device which is lightweight, has high strength and is inexpensive to manufacture, by solving the above-mentioned drawbacks.

[0005]

According to the present invention, in order to achieve the above object, a key of an electronic musical instrument is constituted by a reed provided on a metal keyboard chassis and a pin standing upright in the reed. The keyboard chassis is swingably supported at a fulcrum, and the key chassis is provided with a downward swing restraining means in front of the keyboard chassis and the key upward restraining means is provided behind the keyboard chassis. It is divided into a front chassis provided with the lower swing restricting means and a rear chassis provided with the upper swing restricting means, and these front and rear chassis are connected and fixed by a plurality of metal reinforcing beams extending parallel to the key. Was configured.

[0006]

The front chassis is provided with necessary parts such as a lower swing restricting means, a reed, a sound switch, and the like, and the rear chassis is also provided with necessary parts such as an upper swing restricting means. Connected by metal reinforcement beams. The metal reinforcing beam extends in parallel with a key to be mounted later, and a substantially frame-shaped keyboard chassis is formed by the front and rear chassis and a plurality of metal reinforcing beams. After that, a key, a hammer and the like are attached, and the keyboard device is assembled. Depending on the specifications of the instrument,
The key length changes. At this time, the keyboard chassis is assembled by changing the length of the metal reinforcing beam. The assembled keyboard chassis is usually mounted on a wooden shelf board of the instrument, but the keyboard chassis is substantially frame-shaped, has high strength, is lightweight, and has high assembly accuracy. Deformation does not occur, and a good playing feeling can be maintained.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.
In FIG. 2, reference numeral 1 denotes a metal keyboard chassis of a keyboard device of an electronic musical instrument, 2 denotes a white key, 3 denotes a black key provided on the other side of the white key 2, and these keys 2, 3 Keyboard chassis 1
Are supported by a fulcrum 6 composed of a plastic reed 4 provided at the center and a plurality of pins 5 provided at a distance from the plastic reed. In order to restrict the downward swing of each of the keys 2 and 3, a downward swing restricting means 7 comprising a cushion is provided in front of the keyboard chassis 1 for restricting the upward swing of each key. An upper swing restricting means 8 also comprising a cushion is provided at the rear of the keyboard chassis 1. The details of the keyboard chassis 1 are as shown in FIG. 3, and a plurality of front chassis 1a and rear chassis 1b, which are divided into front and rear portions, extend in a direction parallel to the keys 2, 3, and connect these chassis 1a, 1b. It consisted of a metal reinforcing beam 1c. Although only one metal reinforcing beam 1c is shown in the drawing, the metal reinforcing beam 1c has an interval so as to connect between the front chassis 1a and the rear chassis 1b which extend long in the keyboard arrangement direction. A plurality of, for example, ten,
As a whole, it is configured as a frame keyboard keyboard. The details of the metal reinforcing beam 1c are as shown in FIG. 4 and have an L-shaped cross section.
Was provided.

The front chassis 1a includes a keyboard chassis 1
Before assembling, two cushions for a white key and a black key were provided in advance as the downward swing restricting means 7, and in addition, the reed 4 and the guide pins 9, 9 in which the pins 5 were planted were planted. Necessary components such as the front of the reed 10 and the sound switch 11 are attached. One cushion is also provided in advance on the rear chassis 1b as the upward swing restricting means 8, and the other keys 2, 3
Necessary parts such as a bearing member 13 for supporting a hammer 12 for imparting inertial force to the motor and a bracket 15 for mounting an upper limit stopper 14 for restricting the upper limit of the swing of the hammer 12 are provided. Then, the chassis 1a and 1b before and after attaching these necessary parts are connected to each other by a metal reinforcing beam 1c, assembled into a keyboard device, and attached to a musical instrument shelf.

The keyboard chassis 1 includes front and rear chassis 1.
a, 1b and a plurality of metal reinforcing beams 1c are formed in a frame shape, so that they are lightweight and strong, and when the length of the keys 2 and 3 is changed, the length of the metal reinforcing beam 1c is changed. Only the chassis 1a, 1b need not be changed.

[0010]

As described above, according to the present invention, the metal keyboard chassis of the electronic musical instrument is divided into a front chassis provided with the lower swing restricting means and a rear chassis provided with the upper swing restricting means. Since these chassis are connected and fixed with a plurality of metal reinforcing beams parallel to the key, a keyboard chassis that is lightweight and sturdy and has high assembling accuracy can be obtained. Even if the shelf board on which the is attached is deformed, the keyboard device is not affected, and even if the key length changes, it can be dealt with by changing only a part of the members, so that the keyboard device becomes inexpensive. effective.

[Brief description of the drawings]

FIG. 1 is a cutaway side view of a conventional example.

FIG. 2 is a cutaway side view of the embodiment of the present invention.

FIG. 3 is a perspective view of a main part of the present invention.

FIG. 4 is a perspective view of a metal reinforcing beam.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 keyboard chassis 2, 3 key 4 reed middle 5 pin 6 fulcrum 7 downward swing restricting means 8 upper swing restricting means 1 a front chassis 1 b
Rear chassis 1c Metal reinforcement beam

Claims (2)

(57) [Scope of request for utility model registration] A key of an electronic musical instrument is swingably supported at a fulcrum constituted by a reed provided on a metal keyboard chassis and a pin standing upright in the reed, and the key is provided in front of the keyboard chassis. A key chassis is provided with a key lower swing restricting means and a key upper restricting means is provided behind the key chassis. A keyboard device for an electronic musical instrument, wherein the keyboard device is divided into a rear chassis provided with a regulating means and these front and rear chassis are connected and fixed by a plurality of metal reinforcing beams extending in parallel with the key. 2. A keyboard device for an electronic musical instrument according to claim 1, wherein a reed provided with said pins is mounted on said front chassis.