JPH04130996U - keyboard device - Google Patents

Abstract

(57) [Summary] [Purpose] In a keyboard device, weights can be easily attached without using adhesives, and the touch feel of the keys can be increased to a certain extent without increasing the weight of the weights. To make it possible to obtain a key touch feeling similar to that of a piano. [Structure] A weight support part 31 is provided at the lower front end of the key 3, which is rotationally displaced in response to a key press operation, and is open at least on the top side to support the weight 30.
A hook portion 34 is provided for fixing.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a keyboard device such as an electronic piano.

0002

[Conventional technology]

Electronic keyboard instruments such as electronic pianos have a key touch similar to that of an acoustic piano. In order to feel the touch, a weight is placed on the top of the inside of the key, and the weight of this weight causes the key to press when pressed. There are some that apply a predetermined load.

0003 FIG. 3 shows an example of such a conventional electronic keyboard instrument. This electronic keyboard instrument has a sheet metal keyboard inside the synthetic resin instrument body case 1. A chassis 2 is provided. On the top side of the keyboard chassis 2, there are multiple Keys (white keys and black keys; however, only the black keys will be explained) are arranged in parallel in scale order. It is placed. The rear end of the key 3 is provided at the rising part 4 of the rear end of the keyboard chassis 2. An engaging portion that is inserted into the rectangular support hole 5 and rotatably engages with the upper end of the support hole 5. 6 is provided. There is a space between the key 3 and the keyboard chassis 2 at the rear end of the key 3. A coil that pushes up the key 3 with a constant spring force and engages the engaging portion 6 with the upper end of the support hole 5 A spring 7 is arranged. The key 3 is urged upward by the coil spring 7. Usually, a substantially L-shaped stopper piece 8 hanging down from the center lower end of the key 3 is used as the keyboard shutter. The keyboard is inserted into the bottom surface of the keyboard chassis 2 through the hole 10 formed in the rising part 9 of the keyboard chassis 2. By coming into contact with a band-shaped stopper member 11 made of felt, etc., It is positioned at a predetermined initial position (upper limit position). Below the stopper piece 8 There is felt on the top surface of the keyboard chassis 2 to regulate the lower limit position of the key 3. A belt-shaped stopper member 12 is provided. Also, the center of keyboard chassis 2 A guide member 13 is provided in the section to prevent the key 3 from moving laterally. . Furthermore, on the tip side of the key 3, the inner upper surface surrounded by the side plate 14 and the rib 15 has a , a weight 16 of a predetermined weight is attached with adhesive.

0004 Further, on the lower surface of the key 3, there are two switch pressing parts 20 approximately cross-shaped in plan. It is provided. A rubber switch 21 is arranged below the switch pressing part 20. There is. The rubber switch 21 is a circuit board 2 attached to the bottom surface of the keyboard chassis 2. 2, and passes through the hole 18 formed in the keyboard chassis 2. It protrudes above the seat 2. The rubber switch 21 has an inverted bowl-shaped expansion on the rubber sheet. An elastically deformable product having a projecting portion to form the first and second switch portions 23 and 24. When the key 3 is pressed, the first and second switch parts 23 and 24 are activated to release the key 3. The keys are sequentially elastically deformed and switched with a time difference corresponding to the key press speed. It has become.

[0005] Next, the operation of this electronic keyboard instrument will be explained. The key 3 is pressed against the elastic force of the coil spring 7 and the rubber switch 21. , the key 3 is centered around the engaging portion 6 of the key 3 that is engaged with the upper end of the support hole 5 of the keyboard chassis 2. Then, it is displaced downward in the clockwise direction in FIG. At this time, the weight of the weight 16 causes inertia on the finger. Because it acts as a force, it is a lightweight key 3 made of synthetic resin but has a heavy feel. You can obtain a key touch feeling similar to that of an acoustic piano. It will be. In addition, the key 3 is displaced downward in the clockwise direction in FIG. When the switch pressing part 20 presses the rubber switch 21, the first and second buttons of the rubber switch 21 are pressed. and the second switch sections 23 and 24 sequentially with a time difference corresponding to the pressing speed of the key 3. Switching occurs through elastic deformation. Then, the switching of the second switch section 24 As a result, key-on data that instructs the sound source to start producing musical tones is obtained, Also, due to the time difference, data related to the key press speed, that is, musical sound characteristics such as the volume and timbre of the musical sound. Initial touch data for initial control of the sensitivity can be obtained. to key 3 When the key press operation is released, the key 3 is pressed against the coil spring 7 and the rubber switch. It is returned to its original initial position by the elastic return force of 21.

[0006]

[Problem that the idea aims to solve]

By the way, in such a conventional electronic keyboard instrument, the weight 16 is attached to the inner top surface of the key 3. It is necessary to use adhesive to attach it, and the attachment point is key. 3, the installation work is troublesome because it is surrounded by the side plate 14 and rib 15. There is a problem. In addition, this electronic keyboard instrument approaches the feel of the keys on an acoustic piano. In order to Not only is it inconvenient to carry, but it also requires increasing the strength of the instrument case body 1. There are problems such as not having one. The purpose of this invention is to be able to easily attach weights without using adhesives, and to A keyboard device that can make the key touch feel heavier to some extent without increasing the weight of the weight. The goal is to provide the following.

[0007]

[Means to solve the problem]

This invention is designed to provide at least the upper surface of the lower part of the front end of the key, which rotates as the key is pressed. A weight support part with an open side for supporting a weight is provided, and the weight is fixed to this weight support part. It is characterized by having a hook portion for fixing the device.

[0008]

【Example】

Hereinafter, with reference to FIGS. 1 and 2, an example of an implementation in which this invention is applied to an electronic keyboard instrument. An example will be explained. In this case, the same parts as in Fig. 3 are given the same reference numerals, and their explanations are as follows. Omit as appropriate.

[0009] In this electronic keyboard instrument, a weight 30 formed in a rectangular parallelepiped shape is supported at the lower front end of the key 3. A weight support section 31 is provided. The weight support portion 31 extends forward from the bottom of the front end of the key 3. Consisting of an extending bottom plate 32 and a front plate 33 extending upward from the front end of the bottom plate 32, As shown in Fig. 2, the structure has an open top side and both sides in the arrangement direction of the keys 3. It is constructed. This weight support part 31 is attached to the instrument case body 1 so that it cannot be seen from the outside. The upper end of the weight 30 can be attached to and detached from the upper part of the front plate 33 of the weight support part 31. A hook portion 34 is provided to be engaged with. In this case, the front plate 33 is It may be formed with the same width as the weight 30 over the end, but from the bottom end to the top end. It is formed in an inclined state that gradually becomes narrower than the width of the weight 30. In addition, the weight support Although the portion 31 is open on both sides, the present invention is not limited to this, and both sides are closed in a pocket-like manner. It may be peeled off.

0010 In this way, in this electronic keyboard instrument, the weight support part 3 provided at the lower front end of the key 3 By pushing the weight 30 into 1 from above, the weight can be attached without using adhesive as in the past. 30 is placed on the bottom plate 32, and the hook part 34 locks and fixes the upper end of the weight 30. In addition, the weight 30 can be attached to the side plate 14 of the key 3 or to the ribs, unlike conventional methods. Since the weight 30 is not surrounded by parts 15, etc., the weight 30 can be easily and easily attached to the weight support part 31. can be used. In this case, as the weight of the weight 30 increases from the low range side to the high range side, Therefore, even if it is configured to gradually become lighter, it can be easily installed. Acoustic peer where the key pressing force gradually becomes lighter from the low range side to the high range side It is possible to obtain a key touch feeling similar to that of .

[0011] In addition, in this electronic keyboard instrument, the weight 30 is attached to the weight support part 31 at the lower front end of the key 3. Since it is attached to the key 3, compared to the conventional case where it is provided on the top inside of the key 3 The distance from the upper end of the support hole 5 of the keyboard chassis 2, which is the center of rotation, to the center of the weight 30. The distance is longer, so you can use it on an acoustic piano without increasing the weight of the weight 30. It is possible to obtain an approximate key touch feeling. In particular, the weight 30 is located at the front end and lower end of the key 3. Since it is provided at the bottom of the key 3, compared to the case where it is provided at the top of the front end of the key 3. If provided, the distance from the center of rotation of the key 3 will be longer, and the weight will be further increased accordingly. 30 weight can be reduced. This makes the entire instrument lighter and easier to carry. is convenient, the instrument case body 1 does not require high strength, and is inexpensive. I can do it.

0012 In the embodiment described above, the weight support part 31 is projected forward at the lower part of the front end of the key 3. Although the key 3 is made to protrude from the lower part of the front end thereof, it may be made to protrude rearward. Like this For example, the instrument case is placed so that the weight support part 31 is hidden so that the weight support part 31 is not visible from the outside. There is no need to configure the instrument case body 1, and the structure of the instrument case body 1 is simplified. Ru.

[0013]

[Effect of the idea]

As explained above, according to this invention, the key that rotates as the key is pressed is At the lower part of the front end, a weight support part is provided that is open at least on the top side and supports the weight. , Since a hook part for fixing the weight is provided on this weight support part, it can be used without using adhesive. The weight can be easily attached to the key, and the distance from the center of rotation of the key to the center of the weight can be easily attached. The distance can be increased, which increases the feel of the key touch without increasing the weight of the weight. This makes it possible to increase the weight of the keys to a degree similar to that of an acoustic piano. can be done.

[Brief explanation of drawings]

FIG. 1 is a longitudinal side view showing the main parts of an electronic keyboard instrument.

FIG. 2 is a perspective view of the main part of the key.

FIG. 3 is a longitudinal side view showing the main parts of a conventional electronic keyboard instrument.

[Explanation of symbols]

3 key 30 weight 31 Weight support part 34 Hook part

Claims (1)

[Scope of utility model registration request] [Claim 1] A weight support part for supporting a weight is provided at least on the top side and is open at least at the lower part of the front end of the key that rotates as the key is pressed, and the weight is fixed to the weight support part. A keyboard device characterized by having a hook portion.