JPH0575116B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a keyboard device, and particularly to a keyboard device that provides a key touch feeling similar to that of an acoustic piano.

(Prior Art) In recent years, with the spread of electronic keyboard instruments, it has become possible to generate sounds that are almost equivalent to those of acoustic pianos and the like. Accordingly, it has become desirable to have a keyboard that provides a touch feel similar to that of an acoustic piano during actual performance.

In order to obtain this kind of key touch feeling, the
The keyboard device shown in Fig. 7 has been proposed (Jitsuganaki
No. 60-204554 (Utility Model Application Publication No. 62-113362) specification).

This device includes a key 1 that is rotatably disposed in the vertical direction, an elastic member 3 that gives the key 1 a return habit, and an abutment member 5 that is rotatably disposed on the key 1. , a return means 7 for imparting a return habit to the abutting member 5; and an angle setting disposed on the key 1 corresponding to the abutting member 5 and normally locking the corresponding abutting member 5 at an initial position at a predetermined angle. A member 9 and a stopper member 11 disposed corresponding to the abutment member 5 are provided. The abutting member 5 comes into contact with the vicinity of the corner of the stopper member 11 in response to a key depression, and then slides and escapes along the corner. In this case, the direction of the reaction force from the stopper member 11 at the contact point when the contact member 5 starts contacting with the stopper member 11 is a predetermined direction on the rotation direction side off-center from the rotation center of the contact member 5. It is configured so that it is within the angular range.

(Problems to be Solved by the Invention) However, the keyboard device according to the prior application differs from the key touch feeling in an actual acoustic piano in the following points. In other words, in the device of the prior application, although it was possible to obtain a touch feeling due to the escape function, the difference between the initial resistance feeling when the damper head was released and the friction feeling when the jack started to move was not clear.

(Means for Solving the Problems) Therefore, the present invention provides a key rotatably supported by a support member, a receiver provided on the support member and having a slope, and a pusher rotatably supported by the key. A moving body that rolls while its contact surface slides into contact with the slope when the key is pressed;
It is an object of the present invention to solve the above-mentioned problems by providing a keyboard device having a reaction force generator that is provided on a contact surface of a movable body and collides with the slope when the movable body rolls a certain distance on the slope. .

(Operations and Effects) In the keyboard device according to the present invention, when a key is pressed, the contact surface of the movable body slides into contact with the slope of the receiver.
When a moving object rolls a certain distance on a slope, a reaction force generator collides with the slope. Therefore, while the moving object moves a certain distance on the slope, the feeling of the key being touched when the key is pressed is similar to the initial feeling of resistance when the damper head is separated, and the reaction force generating object collides with the slope. In this case, the feeling of friction can be approximated to the feeling of friction when the jack starts to move.

(Example) Hereinafter, an example of a keyboard device according to the present invention will be described with reference to the drawings.

FIG. 1 is a side view of a keyboard device showing an embodiment of the present invention. FIGS. 2 to 5 are enlarged views showing the operation of the moving body according to this embodiment.

In FIG. 1, 21 is a keyboard frame as a supporting member of the keyboard device, and this keyboard frame 2
A plurality of keys 23 are each supported on the key 1 so as to be swingable in the vertical direction using a fulcrum portion 25 as a fulcrum. The fulcrum portion 25 is provided on the rear end side in the longitudinal direction of the key 23, and a spring 27 is provided further on the rear end side of the key 23 for biasing the key 23 in the counterclockwise direction in the figure. There is. That is,
A key press portion 29, which is the front end of the key 23, is raised to a predetermined height by the spring 27 and has a predetermined key press stroke (for example, 10 mm). This spring gives the key 23 a return habit (returns the key 23 to the initial position when the key is released).

Note that 31 is an adjustment screw for making the height of the key pressing portion 29 of each key 23 constant.

Here, a support piece 33 of a predetermined length is provided on the lower surface of the key 23 at the middle in the longitudinal direction so as to protrude downward. A movable body 37 is attached to the lower end of this support piece 33 via a pin 35 so as to be rotatable within the vertical plane. On the other hand, a receiver 39 is erected on the keyboard frame 21 below the support piece 33, and the upper surface of the receiver 39 is such that the front end is located upward and the rear end is located downward in the vertical plane. It is formed by a flat slope 41. That is, as shown in FIG. 1, the upper surface of the receiving body 39 is formed by a slope 41 that slopes upward to the right at a predetermined angle with respect to the substantially horizontal frame 21.

On the other hand, the moving body 37 is provided so that its lower surface can engage with the slope 41 of the receiving body 39. The lower surface has two curved surfaces 43 and 4 that protrude toward the slope.
5. The lower curved surface 43 abuts and engages with the inclined surface 41 at the initial stage of key depression, and the upper curved surface 45 engages with the rear inclined surface 41 after the moving body 37 has rotated clockwise by a predetermined angle. It is a reaction force generator.

The operation of this embodiment will be explained below with reference to FIGS. 2 to 5.

In the keyboard device having the above configuration, as shown in FIG. 2, the lower curved surface 43 of the movable body 37 engages with the slope 41 of the receiver 39 when the key is not pressed.
In this case, the contact point is shifted to the left in the figure from directly below the pin 35.

As illustrated in FIG.
is pushed down. As a result, the movable body 37 rotates counterclockwise in the figure while the lower curved surface 43 slides into contact with the slope 41 due to the reaction force from the receiving body 39. The frictional force caused by these sliding contacts is transmitted to the finger that presses the key, and acts as a resistance force against the key press. This resistance represents the initial feeling of resistance when the damper head of a grand piano is released.

Next, when the key 23 is pushed down further (for example, by about 2 mm), the movable body 37 rotates further, and the upper right curved surface 45 comes into sliding contact with the slope 41, as shown in FIG. As a result, a predetermined friction force (reaction force) is applied to the moving body 37. This frictional force further increases the resistance force against the swinging of the key 23, and represents the feeling of friction caused by the jack rising on a grand piano. In other words, when the key press stroke exceeds a predetermined value, the resistance force against the swinging of the key 23 increases.

Furthermore, when the key 23 is pressed down, a plane continuous with the curved surface 45 of the movable body 37 comes into contact with the slope 41, as shown in FIG. As a result, the swinging of the key 23 is stopped.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of a keyboard device according to the present invention, FIGS. 2 to 5 are side views showing the operation of a moving body according to one embodiment, and FIG. 6 is a conventional keyboard device. FIG. 7 is a partially sectional side view showing the device, and FIG. 7 is a side view showing essential parts of the conventional keyboard device for explaining its escape action. 21... Keyboard frame (supporting member), 23...
key, 37... moving object, 39... receiver, 41...
slope, 43... curved surface (contact surface), 45... curved surface (reaction force generator).

Claims (1)

[Scope of Claims] 1. A key rotatably supported by a support member, a receiver provided on the support member and having a slope, and a receiver rotatably supported by the key and whose contact surface slides into contact with the slope when the key is pressed. 1. A keyboard device comprising: a moving body that rolls while moving; and a reaction force generator that is provided on a contact surface of the moving body and collides with the slope when the moving body rolls a certain distance on the slope.