JPH06289850A - Keyboard device of musical instrument - Google Patents

Abstract

PURPOSE:To give a click feeling to a key with a simple constitution by extracting and fitting a projection part provided on the slide surface of one of both fulcrum parts from and in a recessed part formed in the slide surface of the other when the key is pressed. CONSTITUTION:Many keys are arranged on the top surface of a keyboard frame 1 made of a metallic plate, etc., in parallel to one another, and the keys 2 are sectioned in a U shape whose reverse side is open. When one key is pressed, the projection part 11 formed on the slide surface of one of the fulcrum part provided to the key 2 and the fulcrum part provided to a key fulcrum member 7 comes out of the recessed part 9 formed in the slide surface of the other to generate large resistance momentarily, thereby obtaining a click feeling. When the key is released, the key 2 rotates in order to return to its original state with the restoring force of an energizing means 12, but an induction force of engagement is generated at the moment the projection part 11 is fitted in the recessed part 9, thereby obtaining a click feeling.

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 musical instruments provided in an electronic piano or the like.

[0002]

2. Description of the Related Art In a general keyboard instrument, when a key is pressed with a finger, there is some resistance (clicking feeling), and when the finger is released from the key, it is returned to its original position with a light touch. Is desirable.

From such a point of view, a keyboard device of a musical instrument which can give a feeling of clicking to a key is conventionally known as disclosed in Japanese Utility Model Publication No. 52-56841.

This conventional keyboard device includes a protrusion protruding downward from the key and an engagement piece elastically engaged with the protrusion.
When the key is pressed, the protrusion and the engaging piece come into contact with each other to generate frictional resistance.

[0005]

In the above-mentioned conventional device, the protrusion and the engaging piece must be specially provided as a dedicated component for producing the function of giving the key a click feeling. There was a problem that was complicated.

The present invention has been made in view of the above circumstances, and a first object of the present invention is to provide a keyboard device for a musical instrument which has a simple structure while being capable of generating a function of giving a click feeling to a key. Is to provide.

A second object of the present invention is that, in addition to the first object, it is possible to make the concave portion and the convex portion larger,
An object of the present invention is to provide a keyboard device of a musical instrument which can be easily processed and has improved durability.

[0008]

In order to achieve the above-mentioned first object, the first aspect of the present invention is to provide a fulcrum portion provided on the key support member with a fulcrum portion provided on the key by pressing means. The keys are slidably fitted to each other in a pressed state, and the keys are rotatable in the vertical direction about a fulcrum portion provided on the keys, and the keys are pivoted upward by the key return means. In a keyboard device for a biased musical instrument, a concave portion is provided on one of the sliding surfaces of both of the fulcrum portions and a convex portion is provided on the other sliding surface, and the convex portion is formed in accordance with the rotation of the key when pressed. Is separated from the concave portion, and the convex portion is fitted into the concave portion in accordance with the rotation by the key release.

Further, in the case of a keyboard having a hammer for achieving the same purpose, the second aspect of the present invention is that the fulcrum portion provided on the key is pressed by the pressing means to the fulcrum portion provided on the key supporting member. In such a state that they are slidably fitted to each other, the key is rotatable in the vertical direction about a fulcrum portion provided on the key, and the key is biased upward by the key return means. And at the fulcrum part provided on the hammer support member,
The fulcrums provided on the hammer are slidably fitted to each other while being pressed by the pressing means, so that the hammer can be vertically rotated about the fulcrums with the rotation of the key. In the keyboard device of the musical instrument, a concave portion is provided on a sliding surface of one of the fulcrum portion of the hammer support member and the fulcrum portion of the hammer, and a convex portion is provided on the other sliding surface,
It is characterized in that the convex portion is detached from the concave portion when the key is rotated by pressing the key, and the convex portion is fitted into the concave portion when the key is rotated.

In order to achieve the above-mentioned second object, the third aspect of the present invention is such that the fulcrum portion provided on the key is pressed by the pressing means to the fulcrum portion provided on the key supporting member. The keys are slidably fitted to each other, and the keys are rotatable in the vertical direction about a fulcrum portion provided on the keys, and the keys are biased upward by a key returning means, and The fulcrum portion provided on the hammer support member is slidably fitted to each other while the fulcrum portion provided on the hammer is pressed by the pressing means, and the action point of the key is changed according to the rotation of the key. In a keyboard device of a musical instrument in which the hammer is capable of rotating in the up-down direction about the fulcrum of the hammer by contacting the force point of the hammer, one of the fulcrum of the hammer support member and the fulcrum of the hammer is provided. Each sliding surface has a concave portion and the other sliding surface has a convex portion. The convex portion separates from the concave portion when the key is rotated by pressing the key, and the convex portion fits into the concave portion when the key is rotated, and the fulcrum of the key The distance from the portion to the point of action is set larger than the distance from the fulcrum of the hammer to the force point.

[0011]

According to the invention described in claim 1, when the key is depressed, one of the fulcrum portion provided on the key and the fulcrum portion provided on the key fulcrum member is moved from the concave portion provided on the sliding surface to the other. When the convex portion provided on the sliding surface is detached, a large resistance is instantaneously generated and a click feeling is obtained. Also, when releasing the key,
The key is rotated so as to return to the original state by the restoring force of the urging means, but at this time, an inducing force that fits in at the moment when the convex portion fits into the concave portion is generated, and a click feeling is obtained.

According to the second aspect of the present invention, when the key is pressed, one of a fulcrum portion provided on the hammer and a fulcrum portion provided on the hammer support member is rotated with the rotation of the key. When the convex portion provided on the other sliding surface is separated from the concave portion provided on the sliding surface, a large resistance is instantaneously generated, and a click feeling is obtained. Further, when the key is released, the hammer also returns along with the return of the key, and at this time, an inducing force that fits in at the moment when the convex portion fits into the concave portion is generated, and a click feeling is obtained.

According to the third aspect of the present invention, when the key is pressed, one of a fulcrum portion provided on the hammer and a fulcrum portion provided on the hammer support member is rotated with the rotation of the key. When the convex portion provided on the other sliding surface is separated from the concave portion provided on the sliding surface, a large resistance is instantaneously generated, and a click feeling is obtained. Further, when the key is released, the hammer also returns along with the return of the key, and at this time, an inducing force that fits in at the moment when the convex portion fits into the concave portion is generated, and a click feeling is obtained. In addition, since the distance from the point of contact of the hammer to the key to the fulcrum of the hammer is set larger than the distance from the fulcrum of the key to the point of contact with the hammer, the rotation angle of the hammer is It becomes larger than the dynamic angle, and the convex portion and the concave portion can be made larger.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 is a sectional view showing a keyboard device of a musical instrument according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a keyboard frame made of a metal plate or the like, and its upper surface. Although a large number of keyboards (white keys and black keys) are arranged in parallel with each other in FIG. 1, only one key (white key) 2 is shown in FIG. The key 2 has a substantially U-shaped cross section with an open bottom surface.

A rear end wall 3 is bent and formed vertically upward at the rear end edge of the keyboard frame 1. A front end wall 4 is bent and formed vertically downward at the front end edge of the keyboard frame 1. A horizontal wall 5 is formed by bending at the lower end edge of the front end wall 4 toward the front in the horizontal direction. A front edge wall 6 is formed at the front edge of the horizontal wall 5 so as to be vertically upward and set at a height of about ¼ of the height of the front end wall 4.

A key support member 7 is provided above the rear end of the keyboard frame 1. The key support member 7 is fixed to the keyboard frame 1 with its rear surface being in close contact with the front surface of the rear end wall 3.

Inside the key supporting member 7, there is provided a concave fulcrum portion 8 which is open at the front surface thereof. As shown in FIG. 2, the recessed fulcrum portion 8 has a substantially semicircular shape, and a substantially semicircular recessed portion 9 is provided at a substantially middle portion in the vertical direction of the peripheral edge portion.

A convex fulcrum portion 10 provided at a rear end portion of the key 2 is slidably fitted to the concave fulcrum portion 8, and the key 2 is vertically moved around the convex fulcrum portion 10 as a center. It is designed to rotate. The convex fulcrum portion 10 has a substantially semicircular shape corresponding to the concave fulcrum portion 8, and a convex portion 11 having a shape corresponding to the concave portion 9 of the concave fulcrum portion 8 is provided at an approximately vertical middle portion of the peripheral edge portion thereof. Has been. The convex portion 11 fits into the concave portion 9 when the key 2 is not pressed, and the concave portion 9 is pressed when the key 2 is pressed.
When it comes off and comes into contact with the inner surface (sliding surface) of the concave fulcrum portion 8, an appropriate frictional resistance is generated.

The key 2 is moved upward by the leaf spring 12 (in FIG. 1,
While being urged to rotate in the direction of arrow C), the peripheral edge of the convex fulcrum portion 10 is pressed in the direction in which it comes into pressure contact with the peripheral edge of the concave fulcrum portion 8 (direction of arrow D in FIG. 1). Leaf spring 12
As shown in FIG. 1, the front end is engaged with a spring receiving member 13 provided on the upper surface of the keyboard frame 1, and the rear end is engaged with a spring receiving member 14 provided on the inner surface of the rear concave portion of the key 2.

A key guide 15 is provided on the upper surface of the front end portion of the keyboard frame 1, and the key guide 15 is fitted inside both side walls of the keyboard frame 1 to rotate the key 2 in the vertical direction. It is designed to guide you. On the rear end side of the key 2, a protruding piece 16 having a substantially L-shaped side surface is provided so as to face downward. The lower end of the projecting piece 16 is movably engaged with a slit 17 provided in the front end wall 4 of the keyboard frame 1. A stopper 18 made of felt is provided on the upper surface of the horizontal wall 5 of the keyboard frame 1, and the lower end of the key 2 is regulated by the lower end of the protruding piece 16 of the key 2 contacting the stopper 18. It has become so.

Next, the operation of the keyboard device having the above structure will be described with reference to FIG.

First, when the key 2 is not pressed, the convex portion 11 of the convex fulcrum portion 10 is fitted in the concave portion 9 of the concave fulcrum portion 8 as shown in FIG. The distance from the point (portion pressed by the finger) F to the inner surface of the concave fulcrum portion 8 is L1.

By pressing the action point F of the key 2 with a finger from such a state, the key 2 is rotated downward. With this rotation, as shown in FIG. 3B, the convex portion 11 of the convex fulcrum portion 10 separates from the concave portion 9 of the concave fulcrum portion 8, and the peripheral edge portion contacts the peripheral edge portion of the concave fulcrum portion 8. By doing so, an appropriate frictional resistance is generated. In this way, by separating the convex portion 11 of the convex fulcrum portion 10 from the concave portion 9 of the concave fulcrum portion 8,
The distance from the action point F of the key 2 to the peripheral edge of the concave fulcrum portion 8 is L2 (L2> L1), and the rotation center O moves. At the moment when the convex portion 11 of the convex fulcrum portion 10 separates from the concave portion 9 of the concave fulcrum portion 8, there is a great sense of resistance, which is felt as a click feeling.

When the finger is released from the action point F of the key 2 to release the pressure, the key 2 is rotated upward by the urging force of the leaf spring 12 to return to the original position, and the convex fulcrum portion 10 is formed. Convex part 1
1 is fitted in the concave portion 9 of the concave fulcrum portion 8 to be in the state shown in A of FIG. When the convex portion 11 of the convex fulcrum portion 10 is fitted into the concave portion 9 of the concave fulcrum portion 8, an inductive force is generated such that the convex portion 11 is sucked into the concave portion 9, and this feels as a weak click feeling when releasing the key. It is what is done.

Since the frictional resistance generated here is as close as possible to the rotation center O of the key 2, the portion touched by the finger of the key 2 when pressing a portion far from the rotation center O of the key 2 for playing. Then, since the frictional resistance is reduced and transmitted, the touch feeling of the key 2 becomes mild.

Particularly, since the rotation center O of the key 2 moves along with the rotation, the moment related to the return load of the key 2 changes. Using this principle, the load on the finger during the pressing stroke of the key 2 can be controlled.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same parts as those in the first embodiment described above are designated by the same reference numerals in the drawings. FIG. 4 is a perspective view showing a keyboard device according to a second embodiment of the present invention. In FIG. 4, the points different from the first embodiment are the shapes of the concave fulcrum portion and the convex fulcrum portion, and the concave portion and the convex portion. The shape and the arrangement position of. That is, as shown in FIG. 6, the concave fulcrum portion 8a has a substantially square shape in which the upper surface and the front surface are open and the corner portions are arcuate. The convex fulcrum portion 10a has a circular shape as shown in FIG.

The concave portions 9a are provided on both inner surfaces of the concave fulcrum portion 8a from the central portion to the upper edge portion.
The recess 9a has a taper shape in which the width gradually increases from the lower end side toward the upper end side as shown in FIG. 6, and also has a substantially semicircular shape in plan view as shown in FIG. .

The convex portions 11a are provided on both outer surfaces of the convex fulcrum portion 10a corresponding to the concave portions 9a, from the central portion to the upper edge portion. As shown in FIG. 6, the convex portion 11a has a taper shape in which the width gradually increases from the lower end side toward the upper end side as shown in FIG. 6, and the semi-circular shape as shown in FIG. There is.

The convex fulcrum portion 10a when the key 2 is not pressed
The convex portion 11a is fitted into the concave portion 9a of the concave fulcrum portion 8a as shown in FIGS. Then, when the key 2 is pressed, the convex portion 11a of the convex fulcrum portion 10a separates from the concave portion 9a of the concave fulcrum portion 8a as shown in FIGS. 7 and 8 and comes into contact with both inner surfaces of the concave fulcrum portion 8a. By doing so, an appropriate frictional resistance is generated.

Also in this embodiment, a click feeling is generated at the moment when the convex portion 11a of the convex fulcrum portion 10a is separated from the concave portion 9a of the concave fulcrum portion 8a, and the convex portion 11a of the convex fulcrum portion 10a is concave fulcrum. A weak clicking sensation is also generated when fitting into the recess 9a of the portion 8a.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIGS. 9 and 10. In the present embodiment, the same parts as those in the first embodiment described above are designated by the same reference numerals in the drawings. FIG. 9 is a cross-sectional view showing a keyboard device according to a third embodiment of the present invention. In the figure, the points different from the first embodiment are the fulcrum part of the hammer that interlocks with the key and the fulcrum of the hammer support member. The present invention is applied to a part.

That is, the key frame 1 is provided with a hammer support member 19, and inside the hammer support member 19,
As shown in FIG. 10, a substantially semicircular concave fulcrum portion 20 that is open on the front surface is provided. In this concave fulcrum portion 20, as shown in FIG. 10, a substantially semicircular convex fulcrum portion 22 provided at the rear end of a hammer 21 as a mass body.
Is slidably fitted.

The hammer 21 is arranged below the key 2, and rotates in the up-down direction about the convex fulcrum portion 22 as the key 2 rotates. The distance L2 from the point of action S in FIG. 9 to the center of the convex fulcrum portion 22 of the hammer 19 is the distance L3 from the point of action S to the center of the convex fulcrum portion 10 of the key 2.
Is set to about 1/3. Therefore, due to the principle of leverage, the stroke of the hammer 21 is approximately three times larger than the stroke of the key 2.

The hammer 21 is urged to rotate upward together with the key 2 (in the direction of arrow C in FIG. 9) by the leaf spring 12. The leaf spring 12 has a spring receiving member (not shown) provided on the key 2 at its front end and a hammer 21 at its rear end.
Are respectively locked to spring locking portions 23 provided near the convex fulcrum portion 22. The key 2 is in a direction in which the convex fulcrum 10 is pressed against the concave fulcrum 8 by the leaf spring 12 (see FIG. 9).
(Center, right). Also, the hammer 21
Is pressed by the leaf spring 12 in a direction in which the convex fulcrum portion 22 is in pressure contact with the concave fulcrum portion 20 (leftward in FIG. 9).

On both outer surfaces of the convex fulcrum portion 22 of the hammer 21, concave portions 24 are provided from the center portion to the upper edge portion. The recess 24 has a tapered shape in which the width gradually increases from the lower end side toward the upper end side in a side view, and also has a triangular shape in a plan view.

At the front end positions on both sides of the concave fulcrum portion 20 of the hammer support member 19, a convex portion 25 is provided from the center portion to the upper edge portion. The convex portion 25 has a taper shape in which the width gradually increases from the lower end side toward the upper end side in a side view, and also has a triangular shape in a plan view.

The concave portion 24 of the convex fulcrum portion 22 of the hammer 21 is fitted into the convex portion 25 of the concave fulcrum portion 20 of the hammer support member 19 when the key 2 is not pressed. And key 2
When the key 2 and the hammer 21 are interlocked with each other, the concave portion 24 of the convex fulcrum portion 22 of the hammer 21 is separated from the convex portion 25 of the concave fulcrum portion 20 of the hammer support member 19, and the concave fulcrum portion 20 is removed. By contacting the inner surfaces of both sides of the, appropriate frictional resistance is generated.

Also in this embodiment, when the concave portion 24 of the convex fulcrum portion 22 of the hammer 21 separates from the convex portion 25 of the concave fulcrum portion 20 of the hammer support member 19, a click feeling is generated and the convex fulcrum portion is generated. Even when the concave portion 24 of 22 is fitted in the convex portion 25 of the concave fulcrum portion 20, a weak click feeling occurs.

As in the present embodiment, the stroke and rotation angle are 3 of the stroke and rotation angle of the key 2 according to the principle of leverage.
A recess 24 is formed in the convex fulcrum 22 of the hammer 21 which is about twice as large
Since it is provided, compared with the case where it is provided on the convex fulcrum portions 10 and 10a of the key 2 as in the first and second embodiments described above,
Since the concave portions and the convex portions can be made large, there is an effect that the processing is simplified and the durability is improved.

(Other Embodiments) The shapes of the recesses and the projections are not limited to those shown in the above-described embodiments, but may be the shapes shown in FIGS. 11 to 15.

That is, in the structure shown in FIG. 11, the hemispherical convex portion 11, (11a, 25) is replaced by the convex fulcrum portion 10, (10a,
22), and the hemispherical concave portions 9, (9a, 24) are provided in the concave fulcrum portions 8, (8a, 20).
In the structure shown in (1), the hemispherical concave portion 9 (9a, 24) is provided on the convex fulcrum portion 10, (10a, 22), and the hemispherical convex portion 1 is formed.
1, (11a, 25) to the concave fulcrum portion 8, (8a, 20)
It was installed in. The recesses 9 (9a, 24) in FIGS. 11 and 12 may be circular through holes instead of hemispheres.

The one shown in FIG. 13 has a convex fulcrum portion 1
0, (10a, 22) a plurality of convex portions 1 having different shapes
1, (11a, 25) are provided, and the concave fulcrum portion 8, (8a,
20) is provided with recesses 9, (9a, 24).
In addition, as shown in FIG. 14, the convex fulcrums 10, (10
a, 22) and the concave fulcrum portions 8, (8a, 20) are slidably in contact with each other into a complex shape having a large number of concave and convex surfaces. Further, as shown in FIG. 15, the convex fulcrum portion 10,
The surfaces of (10a, 22) and the concave fulcrum portions 8, (8a, 20) that are in sliding contact with each other have a smooth curved shape other than a circle.

[0045]

As described above in detail, according to the keyboard device for a musical instrument according to the first aspect of the present invention, when the key is pressed, the recessed portion provided on one of the sliding surfaces of the fulcrum portions slides on the other. The key has a click feeling when the convex part provided on the moving surface comes off and fits, so there is no need to provide special parts for giving a click feeling to the key as in the past, and the configuration is simple. It has the effect of being able to give a click feeling to the key.

According to the keyboard device for a musical instrument of claim 2 of the present invention, a keyboard having a hammer has the same effect as that of claim 1 described above.

Further, according to the keyboard device for a musical instrument of claim 3 of the present invention, in addition to the effect of claim 2 described above, the projection of the hammer whose stroke and rotation angle are larger than the stroke and rotation angle of the key. Since the concave or convex portion is provided in the convex fulcrum portion, the concave portion or the convex portion can be made larger than in the case where it is provided in the convex fulcrum portion of the key, which simplifies the processing and improves durability. Has the effect of improving.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a keyboard device of a musical instrument according to a first embodiment of the present invention when a key is not pressed.

FIG. 2 is an enlarged cross-sectional view of both fulcrums at the time of key depression in the same device.

FIG. 3 is an operation explanatory diagram of the same apparatus.

FIG. 4 is a perspective view of a keyboard device of a musical instrument according to a second embodiment of the present invention with both supporting points disassembled.

FIG. 5 is a plan view of both fulcrums when the key is not pressed in the device.

FIG. 6 is a cross-sectional view of both fulcrums when the key is not pressed in the device.

FIG. 7 is a plan view of both fulcrums at the time of key depression in the same device.

FIG. 8 is a cross-sectional view of both fulcrums at the time of key depression in the same device.

FIG. 9 is a cross-sectional view of the keyboard device of the musical instrument according to the third embodiment of the present invention when no key is pressed.

FIG. 10 is an exploded perspective view of both fulcrums in the device.

FIG. 11 is an exploded perspective view of both fulcrums in the keyboard device of a musical instrument according to the fourth embodiment of the present invention.

FIG. 12 is an exploded perspective view of both fulcrums in the keyboard device of a musical instrument according to the fifth embodiment of the present invention.

FIG. 13 is a perspective view of a convex fulcrum portion in a keyboard device of a musical instrument according to a sixth embodiment of the present invention.

FIG. 14 is a cross-sectional view of both fulcrums in the keyboard device of a musical instrument according to the seventh embodiment of the present invention.

FIG. 15 is a cross-sectional view of both fulcrums in the keyboard device for a musical instrument according to the eighth embodiment of the present invention.

[Explanation of symbols]

 2 key 7 key support member 8 concave fulcrum part 8a concave fulcrum part 9 concave part 9a concave part 10 convex fulcrum part 10a convex fulcrum part 11 convex part 11a convex part 19 hammer support member 20 concave fulcrum part 21 hammer 22 convex fulcrum part 24 Concave 25 Convex

Claims (3)

[Claims] 1. A fulcrum portion provided on a key supporting member is slidably fitted to each other while the fulcrum portion provided on the key is pressed by a pressing means, and the fulcrum portion provided on the key is centered. In the keyboard device of the musical instrument in which the key is rotatable in the vertical direction and the key is pivotally urged upward by the key returning means, the sliding surface of either one of the fulcrums is A concave portion and a convex portion are provided on the other sliding surface respectively, and the convex portion separates from the concave portion when the key is rotated by pressing the key, and the convex portion fits into the concave portion when the key is rotated. A keyboard device for musical instruments, characterized in that 2. The fulcrum portion provided on the key is supported by the fulcrum portion provided on the key, the fulcrum portion provided on the key being slidably fitted to each other while being pressed by the pressing means. And the key is pivotally moved upward by the key return means, and the fulcrum portion provided on the hammer support member is provided with the fulcrum portion provided on the hammer. Fitted slidably with each other while being pressed by the pressing means,
In a keyboard device of a musical instrument, wherein the hammer can be rotated in the up-and-down direction around the fulcrum portion as the key is rotated, one of the fulcrum portion of the hammer support member and the fulcrum portion of the hammer. A concave portion is provided on the sliding surface of the key and a convex portion is provided on the other sliding surface, and the convex portion separates from the concave portion when the key is rotated by pressing the key, and the convex portion is formed when the key is rotated. A keyboard device for a musical instrument, wherein the keyboard device is fitted in the recess. 3. A fulcrum part provided on the key is supported by a fulcrum part provided on the key, the fulcrum part provided on the key being slidably fitted to each other while being pressed by the pressing means. And the key is pivotally moved upward by the key return means, and the fulcrum portion provided on the hammer support member is provided with the fulcrum portion provided on the hammer. Fitted slidably with each other while being pressed by the pressing means,
In the keyboard device of a musical instrument, wherein the action point of the key abuts on the force point of the hammer as the key rotates so that the hammer can rotate up and down about its fulcrum portion. A recess is provided on one sliding surface and a projection is provided on the other sliding surface of the fulcrum of the member and the fulcrum of the hammer. When the key is released, the convex portion is fitted into the concave portion when the key is released, and the distance from the fulcrum portion of the key to the point of action is the distance from the fulcrum of the hammer to the force point. A keyboard device for musical instruments characterized by a larger size.