JPH0466995A - Keyboard device - Google Patents

Abstract

PURPOSE:To make the touch feeling of a keyboard device adjustable by supporting keys against a supporting base and guiding the motions of the keys as revolving motions around a virtual fulcrum and, at the same time, making the position of the virtual fulcrum variable. CONSTITUTION:When a key 1 is pressed down, the key 1 is vertically displaced downward, with the upper surface of the key 1 being maintained in a horizontal position. In case of the key 1 is to be titled when it is displaced downward, the arms 6 and 7 of rotating bearings 10 and 14 are released from coupled states with an inclination adjusting member 13 and the arm 7 and the bearing 14 is moved to a desired height. The bearing 14 is fixed to a position after a sliding member 4 is brought to a prescribed position of a guide groove 3 and the bearing 14 is moved to the position in the adjusting slot 11 of the arm 7 while the bearing 14 is moved. Then the bearing 10 is fixed at the intersection of the arms 6 and 7. When such operations are made, distances from the bearing 10 to each engaging section 2, 4, 14, and 16 can be adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a keyboard device, and more particularly to a keyboard device that can adjust the evening/sochi feel.

Prior Art] The keyboard of a conventional musical instrument has a mechanism in which a player presses down one end of a key that is swingably supported on a fulcrum.

In the keyboard of an electronic musical instrument, there is no need to drive a hammer, and short keys are generally used.

When one end of the key is supported by a fulcrum and the other end is pushed down, the other end of the key moves in an arc around the fulcrum.The short-haired key and the long-haired key have a different feel when played. .

JP-A-59-133591 proposes a keyboard that uses short keys and provides a touch sensation similar to that of a long thunderbolt, which includes a circular arc-shaped rotation fulcrum and a key that engages with the circular arc-shaped peripheral surface. . The key moves as if there were a virtual fulcrum at the center of the arc.

By making the key move as if there is a virtual fulcrum on the extension of the key, it is possible to give a touch sensation similar to that of long lightning even when using a short key.

3 Invention or problem to be solved U] If you have a set of keyboards with various lengths from the fulcrum to the end, the easiest keyboard to play will change depending on the player and the piece of music. However, it is difficult to prepare keyboards with keys of various lengths.

An object of the present invention is to provide a keyboard in which the position of the virtual fulcrum of the keys can be changed.

[Means for Solving the Problem] A keyboard device having a plurality of keys, comprising a first rotation bearing coupled to each key, a second rotation bearing coupled to a support base, and a first rotation bearing coupled to a support base. a link guide mechanism linked to the rotation bearing and the second rotation bearing to guide movement of the key relative to the support base; The relationship between the dynamic bearing and the adjustment means is variable.

[Two Actions] A link guide mechanism links a first rotation bearing coupled to the key and a second rotation bearing coupled to the support base, and guides the movement of the key relative to the support base. It becomes possible to move the key around a virtual fulcrum that does not exist. By making the relationship between this link guide mechanism and at least one of the first and second rotation bearings variable using the adjusting means, the position of the virtual fulcrum can be changed and adjusted.

[Embodiment] FIG. 1 is a diagram schematically showing a keyboard to be realized by the present invention.

When the key 1 is supported by one end thereof, when a force F is applied to the other end, the key 1 swings about one end and is displaced as shown by the dotted line. If the fulcrum of this key 1 is moved to the left side,
By similar key pressing operations, the position of key l changes as shown by the dashed line. The point at which the movement is centered, rather than the actual fulcrum, is called the virtual fulcrum.If the virtual fulcrum is moved further away, the key 1 will be displaced as shown by the broken line. If you set the virtual fulcrum to infinity! Ill is displaced in parallel.

By equipping the keyboard with a mechanism that changes the virtual fulcrum,
To enable the position of a virtual fulcrum to be set arbitrarily. Let us consider a mechanism in which a certain quadrangle is defined by the keys of the II board and the support base, and the keys are displaced by deforming this quadrangle.

FIGS. 2(AA) to 2(CB) are diagrams illustrating a structure in which diagonals of a rectangle are defined and the diagonals are made variable in a mechanism for guiding the movement of a key.

In FIG. 2 (AA), a pivot bearing is provided at a point S on the key 1, one pivot bearing R is provided at a point R on the support base 5, and an arm 6.7 is attached to each of these pivot bearings SLR. , and both arms 6.7 are connected with a rotation bearing at the position of point T.
The other ends of the arms are coupled by sliding bearings on the support base and on the key, respectively. The sliding bearing may be one in which a fixed member slides on the object, or one in which the fixed member slides on the object via a bearing such as a roller. The sliding connection positions are Q, respectively.
Let it be P. The two arms 6.7 are of the same length and the point T
When it is located at the midpoint of arm 6.7, the square PQ
R5 defines a rectangle. When the key 1 is pressed down, the angle at which the arms 6.7 intersect changes, and the sliding bearing moves to the left in the figure, resulting in the configuration shown in FIG. 2 (AB). square P
If QR3 is a rectangle, the virtual fulcrum will be at an infinite distance.

Breaking the symmetry of the arm 6.7 that defines the diagonal, the key 1
The slope when pressed down will change.

In FIG. 2 (BA), the rotation bearing that connects the two arms 6.7 is made movable, and the sliding engagement surface on the support base 5 is changed as shown by the broken line, and the state shown in the figure is shown. Two arms 6.7 are rotatably connected. That is, the length of arm 6.7 remains unchanged, but the coupling position T
The length from a to each end varies.

When al is pressed down, the key 1 is displaced and approaches a state parallel to the sliding engagement surface shown by the broken line, as shown in FIG. 2 (BB).
In other words, the virtual fulcrum is formed at the point where the extension of the key 1 and the extension of the broken line intersect in FIG. 2 (BA).

In the configuration shown in FIG. 2 (BA), it is necessary to provide a sliding engagement surface whose angle can be changed.

The configuration shown in FIG. 2 (CA) provides the same effect without providing a sliding engagement surface that can change the texture.

A rotation bearing is provided at a point P on the key 1, a rotation bearing whose position can be changed in the vertical direction is provided on the support base 5, and this point is designated as Q. An arm 6.7 is connected to these rotation bearings, and both arms 6.7 are connected to each other by a movable rotation bearing, and the point is designated as Tb.

The other ends of the arms 6.7 are slidably engaged with the support base 5 and the key at points R1 and S, respectively.

Note that when the rotation bearing at point (lTb) is placed in a movable open state and the rotation bearing at point Q is moved onto the support base 2, a mirror-symmetrical structure as shown in FIG. 2 (AA>) is obtained.

When point Q is moved upward and point S is kept at its original position, the position where arm 4 and bearing Q engage changes, and the position of bearing Tb on arm 6 changes accordingly. The bearing at point Q is changed to a desired height, and both bearings are fixed at that position.

In this state, when key 1 is pressed down, as shown in Fig. 2 (CB
). That is, the key 1 approaches a state parallel to the broken line QR. In this configuration, the virtual fulcrum is formed at the point where the extension of the key 1 and the extension of the broken line intersect in FIG. 2 (CA). Note that in a similar format for defining diagonals, other configurations may be adopted and the virtual fulcrum of al may be changed.

FIG. 3 is a side view showing a keyboard according to an embodiment of the present invention. This embodiment adopts the format shown in FIGS. 2 (CA) and (CB).

The key 1 is formed with a rotation bearing 2 and a guide shaft 3.

An adjustment slot 1 is provided at the bottom of the rotation bearing 2 of the support base 5.
A tilt adjustment member 13 is formed with a tilt adjustment member 13 having a diameter of 0 and a pivot bearing 14 movably coupled within the adjustment slot 12.
An arm 6.7 is connected to each of the pivot bearings 2 and 14. The arm 6 is connected at one end to the pivot bearing 2 and is provided at the other end with a roller 16 in sliding engagement with a guide surface 17 of the support base 5. Note that the roller 16 itself rolls into engagement with the kite surface 17, or the arm 6 has a guide surface 1.
Instead of the roller 16, which is considered to be in sliding engagement with the roller 7, a simple sliding member may be used. The arm 7 has an adjustment slot 11 at one end in which it is connected to a pivot bearing 14 . A sliding member 4 is provided at the other end of the arm 7 and engages with a guide 3 of the key 1. Instead of a simple sliding member, a rolling bearing may be used to form the sliding engagement.At the intersection of the arms 6 and 7, an adjustment slot 8.9 is formed in each case, and a rotating A dynamic bearing 10 is coupled.

Further, a spring 18 is connected between the roller 16 and the inclination adjustment member 13, and exerts a force that pulls the roller 16 to the left. This force causes the key I to move upward. On the right side of the key are a kite rod 21 fixed to the support base and a stone bar 22 fixed on the kite rod 21.
is provided, and the sliding member 23 on the key 1 and the kite rod 21 are slidably engaged. When the sliding member 23 comes into contact with the stopper 22, the upward movement of the lever 1 is stopped. In addition, when the rotation bearings 10 and 14 arranged in the slots are movable, their positions relative to the arms 6 and 7 and the inclination adjustment member 13 can be changed. After that, by fixing the rotation bearing 10 and the arm 6
．． 7 is fixed. Furthermore, in this state,
Arms 6 and 7 can freely rotate. Similarly, if the position of the rotation bearing 14 is fixed, the position of the rotation bearing 14 with respect to the tilt adjustment member 13 and the arm 7 is fixed, or
In this state, the arm 7 engages freely in rotation.

In the state shown in FIG. 3, the two-turn bearing 14 and the roller 16 are on the same level, and the support base 5 and the key 1 are kept parallel to each other from the zero-turn bearing 10 to each end 2.4. .14.1
Since the lengths up to 6 are chosen equally, a rectangle is defined. Since the opposite sides of the rectangle are parallel, arm 6
Even if the angle at which and 7 intersect changes, till remains parallel to the support base 5.

FIG. 4 schematically shows the movement of the keys in this parallel movement type mode.

When al is pressed down, key 1 is displaced vertically downward, or
Its top surface remains horizontal.

To make the key 1 tilt when moved downward, the rotation bearings 10 and 14 are disconnected from the arm 6.7, the tilt adjustment member 13, and the arm 7, and the rotation bearing 14 is moved to the desired height. With the zero rotation bearing 14 moved,
placing the sliding member 4 in place on the kite 1113 and moving the pivot bearing 14 within the adjustment slot 11 of the arm 7;
The rotation bearing 14 is fixed in that position. Then arm 6
2.4.14.16 from the rotation bearing 10 by fixing the rotation bearing 10 at the intersection of 1 and 7.
The distance is adjusted.

5A, 5B and 5C schematically show the movement of the key 1 when the height of the pivot bearing 14 is changed within the adjustment slot 12 of the tilt adjustment member 13.

FIG. 5(A) schematically shows the movement of the rotary bearing 14 in a state in which it has been moved upward to some extent. When key 1 is pressed down,
The key 1 tilts according to the height at which the rotation bearing 14 is lifted.

Figure 5 (B) schematically shows the movement of the key 1 with the rotation bearing 14 in a higher position. As the rotation bearing 14 is lifted upward, the digit 1 of the rotation bearing 10 is moved to the left. When the key is pressed down, the inclination of the key 1 is increased by the amount that the rotation bearing 14 is lifted.

FIG. 5(C) is a schematic diagram showing the position of the virtual fulcrum in the states of FIG. 5(A) and FIG. 5(B).

When the key is pressed down in the state shown in FIG. 5(A), when the top surface of the key 1 is extended in each state, it intersects at one point.

This intersection point becomes a virtual fulcrum.

When the rotation bearing 14 is placed at the lower position, the key 1 moves in parallel, so the virtual fulcrum is at an infinite distance. When the rotation fulcrum 14 is lifted slightly, a virtual fulcrum is formed in the distance. As shown in FIG. 5(B), when the rotation fulcrum 14 is further lifted, the virtual fulcrum approaches near the key 1, as shown in the lower part of FIG. 5(C).

In this way, a keyboard device is obtained in which the virtual fulcrum can be changed as desired.

FIG. 6 shows a configuration in which the basic shape is an isosceles trapezoid and its two leg sides are connected so as to rotate by an equal angle.

In FIG. 6 (AA), two points P and S are defined on the key 1, each provided with a rotation bearing, and engaged so as to rotate at equal angles and in opposite directions. Each arm 2 is attached to this rotation bearing.
8 and 29 are connected, and the other end of the arm is engaged with the support base 5. The other end of the arm 28 is connected to a point Q by a rotation bearing.
It is connected to the support base 5 at. The other end of the other arm 29 is slidably engaged with the support base 5 at point R.

When the lengths of arms 28 and 29 are equal, PQR3 or isosceles trapezoid is formed. When key 1 is pressed down in this state,
As shown in the figure (, AB), the key 1 is displaced parallel to the support base 5. PQR5 always forms an isosceles trapezoid.

FIG. 6 (BA) shows a PSR in which the position of the rotary bearing Q is vertically variable so that the engagement position of the rotary bearing Q with respect to the arm 28 can be changed.
is set in the same manner as in Fig. 6 (AA), and the rotation bearing Q
When only the position of is changed upward, when key 1 is pressed down, 'a1 is displaced toward the lower right as shown in FIG. 6 (BB). The extension of this displaced key 1 and the original state al
It becomes an extension of or a point where it intersects or a virtual fulcrum.

FIG. 7 shows a keyboard according to another embodiment of the invention, this embodiment adopting the format shown in FIGS. 6 (B A , ) and (BB).

In FIG. 7, there are two pivot bearings 26, 27 on the key 1.
are arranged, and gears or frictional engagement parts are provided around each. The rotation bearings 26, 27 are engaged so that when one of them is rotated, the other rotates in the opposite direction by an equal angle. The arm 28 is attached to the rotation bearing 26,27.
．． 29 are connected, and a rotation bearing 14 and a roller 16 are provided at the full end of each arm. roller 16
rolls on the kite surface 17, and the arm 29 and the kite surface 1
There is a spring 1 between the 4 arms 28 and 29 which are slidably engaged with each other.
8 are provided and exert a force to bring arms 28 and 29 closer together. Further, the rotation bearing 14 is engaged so as to be movable within the slot 12 of the tilt adjustment member 13. The relationship between the tilt adjustment member 13 and the rotation bearing 14 is the same as the embodiment shown in FIG. Further, on the right side of the figure, a guide member and a stopper member similar to the embodiment shown in FIG. 3 are provided. To tilt the flll with the key 1 pressed down, adjust the height of the rotation bearing 14 in the slot 12 of the tilt adjustment member 13, and then move the rotation bearing 14 relative to the slot 12 at the adjusted height. and fix it.

FIGS. 8(A) and 8(B) show the movement of the key 1 in two states in which the height of the rotation bearing 14 is adjusted.

As shown in FIG. 8(A), when the rotation bearing 14 is lifted up to a certain extent, when the key 1 is pressed down, the key 1 is tilted downward to the right to some extent.

In this key press operation, by extending the surface of the key 1 in each state and finding the intersection, a virtual fulcrum can be found.

The upper part of FIG. 8(C) shows the operation when performing the operation of FIG. 8(A).
The position of the virtual fulcrum U3 is shown.

FIG. 8(B) shows the movement of qsl when the rotation bearing 14 is further displaced upward. Depending on the height of the rotation bearing 14, Ill1 tilts more downward to the right when a key is pressed.

The virtual fulcrum U4 when performing the operation shown in FIG. 8(B) is as shown in the lower part of FIG. 8(C). That is, the rotation bearing 14
The higher it is raised, the closer the virtual fulcrum gets to Ial.

FIGS. 9(AA) to 9(BB) show a configuration in which a parallelogram is formed between the key 1 and the support base 5 for guiding.

In FIG. 9 (AA), the rotation bearing 3 is mounted on the support base 5.
1.32 and similarly provide a rotation bearing 33.34 on the key 1.0 The distance of the rotation bearing 31.32 and the rotation bearing feed 33
．． An arm 36 connects the zero rotation bearings 31 and 34, which are set to have the same distance, and an arm 38 connects the rotation bearings 32 and 34. The lengths of these arms 36,38 are also equal. That is, rotation bearings 31.32.34
．． 33 forms the apex of the parallelogram. When Ill is pressed down, the parallelogram is deformed as shown in FIG. 9 (AB). Since it is a parallelogram, the line connecting the rotation bearings 31 and 32 and the line connecting the rotation bearings 33 and 34 are always kept parallel. Therefore, the surface of the key 1 is kept horizontal.

Here, as shown in FIG. 9 (BA), the rotation bearing 32a
can be displaced perpendicularly to the support base 5, and can be fixed at a position displaced by a predetermined amount. That is,
The length of the arm 38 is set to be variable. In this state, when ml is pushed down, the arm 36 between the rotation bearings 31 and 33 and the arm 38 between the rotation bearings 32a and 34
Since the lengths of a are different, the line connecting the rotation bearings 33 and 34 changes from the vertical direction. If the arm 38a is shorter than the arm 36, the rotation bearing 34 will have a larger angle change than the rotation bearing 33, and the key 1 will turn to the lower right 6
The amount of downward movement of the key 1 to the right also changes depending on the amount of displacement of the rotation bearing 32a. In this way, a keyboard capable of changing the virtual fulcrum point is obtained, similar to the keyboard of the above-described embodiment.

In the above embodiments, a pivot bearing connected by an arm is provided between the key of the keyboard and the support base, so that at least the position of the pivot bearing can be changed, so that the movement of the key relative to the support base can be changed. , the virtual fulcrum changes.

Although we have explained the case where the rotation fulcrum that changes the position is on the support base side, it is also possible to provide the rotation fulcrum that changes the position on the key side.Also, as a means for exerting the force to return the key,
Although a spring is shown as an example, other means such as an electromagnet can also be used. Although the length of the arm linking the key and the support base does not necessarily have to be changed as in the configuration of FIG. 2 (BA), the position of at least one pivot point can be changed and The manner of such changes is not limited to those described above.

In addition, in the above-mentioned embodiments, the portion described as sliding engagement may be a case where the sliding member slides on the kite member or a case where the sliding member slides through a rolling member such as a roller. However, it will be obvious to those skilled in the art that the present invention is not limited to these, and that, for example, various changes, improvements, combinations, etc. can be made.

[Effects of the Invention] As explained above, according to the present invention, the key is supported on the support base, its movement is guided like a rotational movement around the virtual fulcrum, and A keyboard device whose position can be made variable is obtained.

[Brief explanation of the drawing]

Figure 1 is a conceptual diagram for explaining a keyboard that can change the virtual fulcrum.
), (CB) are schematic diagrams for explaining the diagonal variable link guide configuration, FIG. 3 is a side view showing a keyboard according to an embodiment of the present invention, and FIG. 4 is a movement of the keyboard in FIG. 3. A conceptual diagram for explaining one of the modes; FIGS. 5A, 5B, and 5C are conceptual diagrams for explaining the movement of the tilt adjustment mode of the embodiment of FIG. FIG. 7 is a side view showing a keyboard according to an embodiment of the present invention; FIGS. 8(A), (B), (C ) is a conceptual diagram for explaining the movement of the keyboard in the embodiment of FIG. 7 - FIG. 9 (AA), (
AB), (BA>, (BB) are conceptual diagrams for explaining the Henagamachi modified link configuration. Virtual fulcrum 31. 32. 33. 34 Rotation bearings 36, 38 In the arm diagram, 2.10. 14 4.23 6.7 8.9.11.1 26.27 28.29 Key rotation bearing Kite spring sliding member support base arm 2 adjustment slot/y-tooth tilt adjustment member Roller Kite spring Kite rod stopper engagement turn dynamic bearing arm

Claims (3)

[Claims] (1) A keyboard device having a plurality of keys, a first rotation bearing coupled to each key, a second rotation bearing coupled to a support base, and the first rotation bearing and a link guide mechanism that is linked to the second rotation bearing and guides the movement of the key relative to the support base, and the link guide mechanism, the first rotation bearing, and the second rotation bearing are linked to each other. A keyboard device characterized in that a relationship with a dynamic bearing is made variable by an adjusting means. (2) The keyboard device according to claim 1, wherein the adjustment means includes an adjustment slot formed on the support base and capable of movably supporting the second rotation bearing. (3) The link guide mechanism includes two arms in rotational engagement with each other, each arm in rotational or sliding engagement with the key and the support base, and the adjustment means is configured to adjust the engagement position of the arms. 3. The keyboard device according to claim 1, wherein at least one of the keys can be set variably.