JPH0997076A - Keyboard device of electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect the intention of a player faithfully by further improving key operativeness in a key array direction and responsiveness and to facilitate designing and assembly. SOLUTION: This device is provided with a swing support frame 16 which can swing about a fixed support frame 1 in the key array direction and is equipped with a key guide 19 for each key 6, a 1st elastic member 15 which connects the fixed support frame 1 and swing support frame 16 together and deforms elastically in the key array direction, and a 1st sensor 21 which detects the operating force of the key 6 or a component of displacement in the key array direction from the elastic deformation quantity. Further, the device is provided independently with a 2nd elastic member 30 which has one end fixed to the fixed support frame 3 and deforms elastically in a key pressing/releasing direction according to the operating force of the key 6 and a 2nd sensor 22 which detects the operating force of the key 6 or a component of the displacement in the key pressing/releasing direction from its elastic deformation quantity.

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 organ or an electronic piano, and more particularly, to a method for accurately and accurately determining an operating force or a displacement in a key pressing and releasing direction and a key arranging direction when a key is pressed. The present invention relates to a keyboard device for an electronic musical instrument, which is capable of detecting and generating the musical tone faithfully in accordance with a player's intention.

[0002]

2. Description of the Related Art In electronic keyboard musical instruments such as electronic organs and electronic pianos, various levers and knobs are provided on a keyboard panel, and these can be manually operated as necessary to achieve the tone color desired by a performer. We are trying to obtain various effects. However, when the performer is playing the keyboard with both hands, even if he wants to express the performance by controlling various effects such as tremolo and vibrato, it is difficult to operate the levers and knobs. there were.

As a keyboard device for an electronic musical instrument of this type, for example, as shown in Japanese Patent Publication No. 55-35717, a keyboard frame in which a large number of keys are arranged in a row is vertically (pushed) against the instrument body. A shutter mechanism having a pair of shutter plates that are rotatable in the key direction) and swingable in the left-right direction (key arranging direction) and that are interlocked with the up-down rotation and the left-right swing. The shutter plate is provided with a pair of detectors that generate an electric signal according to the rotation and swing displacement of the keyboard frame by changing the amount of irradiation light, and the generated musical sound is generated based on the detection signals from the detectors. Some are designed to control the effect.

If this keyboard device is used, musical tones can be generated and various effects can be controlled simply by operating the keyboard.
Even when playing with both hands, you can easily add or change the desired effect by pressing the key strongly to rotate the keyboard frame or operating it left and right to swing the keyboard frame in the same direction. It is possible to enhance the musical expression.

However, in such a keyboard device,
Since the structure is such that the entire keyboard frame with all the keys attached is rotated or swung by the operation of each key, the moving part has a large mass, which makes it difficult to operate and makes the performer tired, and the responsiveness is poor. However, there is a problem in that it is not possible to detect delicate movements acting on a key to perform delicate musical tone control, and it is also impossible to control musical tone for each key. Furthermore, although it is possible to detect an after-touch after key depression, it was not possible to control the generation of a musical sound by detecting the situation from the beginning of the key depression operation.

Therefore, the inventor of the present invention firstly provided, under all the keys supported by the key frame, a common swing support frame in the left-right direction along the direction in which the keys are arranged with an elastic member made of a leaf spring. It is provided in a cantilever shape to be supported by the fixed portion of the musical instrument main body via the, and the rocking frame thereof supports the key guide of each key, and is elastically deformed in the longitudinal direction by the key pressing force for each key. A keyboard device provided with a lateral displacement sensor that fixes the root portions of elastic pieces and detects elastic deformation of the elastic member, and a plurality of vertical displacement sensors that individually detect elastic deformation of the elastic pieces. Proposed (Japanese Patent Application No. 6-2202)
22).

According to this keyboard device, the swing support member swings and displaces through the key guide by the operating force in the left-right direction during the key-pressing operation of each key by the player, and the elastic member elastically deforms. By the horizontal displacement sensor, the vertical operation force is detected by each vertical displacement sensor by the elastic deformation of each elastic piece for each key, and the generated musical tone is controlled based on each detection signal. be able to.

Therefore, the key switch provided for each key for detecting the key depression in the conventional keyboard device becomes unnecessary, and the key depression direction and the key depression direction from the beginning of the key depression until the key is released. It is possible to detect an operating force in the key arrangement direction (horizontal direction), generate a musical tone at a pitch corresponding to the key, and control various effects. With respect to the key pressing direction, the operating force of each key is detected by the deformation of each elastic piece, so that delicate musical tone control can be performed individually.

[0009]

However, also in this keyboard device, the left and right swing support frames are used to detect the key guide for each key and the operating force in the key pressing and releasing direction for each key. Since each elastic piece and the displacement sensor are attached and they are integrally rocked, the mass of the rocking portion is still large. Further, since each elastic piece receives the key pressing force, the rocking support frame and the elastic member supporting the elastic piece must have sufficient strength, which further increases the mass thereof.

Therefore, there still remain problems that the player feels tired and that the responsiveness to the key operation force in the key arrangement direction is not sufficient. Further, since the cantilever support of the swing support frame in the left-right direction and the cantilever support of each elastic piece have a folded structure in the longitudinal direction of the key, errors are likely to increase, and high accuracy is required in design and assembly. There was also a problem that

The present invention has been made in view of the above points, and further improves the key operability and responsiveness in the key arrangement direction in the above-described keyboard device so that the player's intention can be faithfully detected. In addition, it is an object of the present invention to prevent the error from being enlarged and to facilitate designing and assembling.

[0012]

In order to achieve the above-mentioned object, a keyboard device for an electronic musical instrument according to the present invention has a fixed support frame fixed to the main body of the musical instrument and a key release direction with respect to the fixed support frame. It is practically immovable and can be swung in the key arrangement direction,
A swing support frame provided with a key guide for guiding the pressing and releasing of the key, and one end on the fulcrum side is rotatably held by the fixed support frame, and is guided to the key guide by a key guide corresponding portion distant from the fulcrum. And a plurality of keys to be used.

Further, the first elastic member that connects the fixed support frame and the swingable support frame and is elastically deformed in the key arrangement direction, and the key operation direction or the key arrangement component in the key arrangement direction is the first component. A first sensor that detects the amount of elastic deformation of the elastic member, a second elastic member that has one end fixed to the fixed support frame, and that elastically deforms in the key pressing direction according to the operating force of the key, and the key operation A second sensor for detecting a component of force or displacement in the key pressing direction based on the elastic deformation amount of the second elastic member. The second elastic member and the swing support frame are separated and independent from each other so that a detection signal is not generated in the second sensor when the key swings in the key arrangement direction.

In this keyboard device, when the key is in the return position, a gap in the key pressing direction is provided between the key and the second elastic member to elastically deform the second elastic member when the key is pressed. A dead zone may be formed.

As a second elastic member, each key is provided with an elastic piece that is elastically deformed in the key pressing direction according to the operating force of the key, and the roots of the plurality of elastic pieces are connected to each other. ,
The elastic end of each elastic piece is elastically deformed by receiving the key pressing force of each key, and a sensor for detecting the displacement due to elastic deformation of each elastic piece is provided for each key as a second sensor. For example, it is possible to individually detect the operating force or the displacement in the key pressing direction of each key with good responsiveness.

In this case, it is preferable that a sensor for detecting the displacement due to elastic deformation of each elastic piece is provided via each sensor support member, and each sensor support member is fixed to each elastic piece. The plurality of elastic pieces are formed in parallel by forming a plurality of slits in a plate-like elastic member to form a comb-like shape, and the root portions of the elastic pieces that are connected to each other are fixed in the key pressing direction. If it is configured to be connected to the fixed support frame as described above, a plurality of elastic pieces can be attached at one time, and the assembling work becomes easy.

The second elastic member may have plural kinds of elastic pieces having different load-displacement characteristics.
In that case, the load-displacement characteristic of each elastic piece of the second elastic member may be configured to change continuously or stepwise according to the pitch. As a result, it is possible to change the touch feeling of the key and the detection characteristics of the operation force or the displacement in the key pressing direction depending on the pitch or range. By making the plurality of elastic pieces of the second elastic member have the same thickness and different lengths or widths, the load of each elastic piece as described above-
The displacement characteristic can be changed.

In the keyboard device of these electronic keyboard musical instruments, the first sensor is interposed between the first elastic member and a detecting member provided at a predetermined distance from the first elastic member. The detection member may be configured to be directly fixed on the first elastic member.

In this case, the detection member is a sensor support member for fixing and holding the first sensor, and a support piece for supporting the first sensor facing the deformation amount detection position of the first elastic member. It is preferable that the supporting piece is a cantilever-shaped member including a mounting portion that also functions as a spacer for fixing the support piece to the first elastic member at a predetermined distance from the first elastic member. The attachment portion of the sensor support member may be fixed near the base end portion of the first elastic member.

Further, a part of the fixed support frame forms a stopper portion for restricting the swing of the swing support frame, and a stopper portion for which the swingable range is restricted is provided on the swing support frame. It is preferable that the fixed support frame is provided so that its position can be adjusted in the key arrangement direction. In that case, a hole is formed in the fixed support frame,
The stopper portion is provided with a protrusion, and the protrusion is inserted into a hole formed in the fixing member so as to be swingable in the key alignment direction, and the swingable range of the swing support frame in the key alignment direction is restricted. It is good to configure so that.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a side sectional view taken along the longitudinal direction of a key of an electronic musical instrument showing an embodiment of the present invention, the lower half of which is a sectional view taken along the line AA of FIG.
The upper half shows the section along the line B-B, and the portion surrounded by the ellipse E of the alternate long and short dash line shows the section along the line C-C.

FIG. 2 is a plan view showing only the vicinity of the treble key end with the upper half of the keyboard device removed. FIG. 3 is a sectional view taken along line BB of only the lower half shown in FIG.
FIG. 4 is a partial bottom view seen from the direction of arrow S in FIG. In the following description, the “key alignment direction” is the left-right (horizontal) direction in which the keys are aligned when viewed from the front side of the keys, which is the direction perpendicular to the paper surface in FIG. 1 and the vertical direction in FIG. The "key release direction" is the direction in which the key is released (vertical direction), which is the vertical direction in FIG. 1 and the direction perpendicular to the paper surface in FIG.

As shown in these drawings, the keyboard device is provided with a first fixed support frame 1 fixed to a musical instrument body (not shown) such as a shelf board. The first fixed support frame 1 is a keyboard. It is a member that supports the entire device, and has a flat plate shape that extends over all keys in the key arrangement direction, and has a shape in which the front, rear, left, and right ends thereof are bent upward.

The rear portion on the first fixed support frame 1 (see FIGS.
At the right end in FIG. 3, an inverted L-shaped second fixed support frame 2 is erected over all the keys (omitted in FIG. 2), and the horse-saddle-type third fixed support frame 3 is provided on the front side thereof. It is fixed all over. Further, a second elastic member 3 described later is provided between the third fixed support frame 3 and the downward channel-shaped fourth fixed support frame 4.
It holds 0, and the supporting frame 4 is cantilevered. These first to fourth fixed support frames form an integral fixed support frame.

A key frame 5 extending over the entire width in the key arranging direction is fixedly provided on the upper surface of the second fixed support frame 2 bent in the horizontal direction and the horizontal upper surface of the fourth fixed support frame 4. There is. The rear end of the key frame 5 is bent upward, and a locking hole 5a corresponding to each key is formed from the lower part of the key frame 5 toward the front side, and the second fixed support frame 2 supporting the key has a front end. The locking hole 2a which is further opened is formed.

The white key 6A is inserted into each of the locking holes 5a and 2a.
Alternatively, the engaging protrusions 6a provided on the lower surface of the rear end of the black key 6B (hereinafter simply referred to as the key 6) are fitted into the key frame 5 and the second fixed support frame 2 with the abutting portions of both engaging as fulcrums. But,
Each key 6 is supported so as to be swingable vertically and horizontally. Each key 6 is a molded product made of resin.

In the portion of the key frame 5 between the second fixed support frame 2 and the fourth fixed support frame 4, spring receiving members 7 for each key are arranged in a row in the key arrangement direction. Then, the contact end of the member 7 is formed in a fork between the spring locking portion 6b provided on the inner lower surface of each key and the spring receiving member 7 provided on the key frame 5, and the key return spring (leaf spring) is formed. ) 8 is biased upward and engaged (it becomes a flat plate shape if the spring is removed) to urge each key 6 to the left in FIG. 1 and to give a habit of returning upward. 6c
Is a temporary locking portion provided on the key 6, and when the key 6 is mounted on the key frame 5, the key return spring 8 is previously locked by the spring locking portion 6b.
Then, the temporary locking portion 6c temporarily locks.

The key swing unit assembly 10 is provided over the entire length of the keyboard device in the key arrangement direction.
This key swing unit assembly 10 is arranged in the vicinity of both ends in the key arrangement direction, a first boots-like member 11 fixed to the first fixed support frame 1 by a screw 9, and the same shape and point-symmetrical arrangement. A cantilevered first elastic member 15 composed of a second boots-like member 12 and a pair of flat springs 13 and 14 fixed to both sides by screwing so as to bridge them by sandwiching them. I have set up. In this first elastic member 15, the two flat springs 13 and 14 are elastically deformable only in the key arranging direction, and the second boot-shaped member 1
2 is swingably supported in the key arrangement direction.

The pair of left and right first elastic members 15, 15
The swing support frame 16 is fixed by screws 17 so as to bridge the space between them (provided at both ends of the keyboard). The rocking support frame 16 is formed by bending a flat plate into a crank shape in the longitudinal direction of the key and extending in the key arranging direction.
a and 16b are formed on the key guide holding plate 18
Is fixed horizontally.

Near the tip of the key guide holding plate 18, a cut-and-raised piece 18a is erected for each key, and a resin key guide 19 is provided there by outsert molding. The key guide 19 is inserted between the inner surfaces of both side walls 6d of each key 6 to guide the pressing and releasing of each key 6 and also to each key 6
The key moves in the same direction as the key arrangement direction (left-right direction). By the displacement of the key guide 19 in the key arranging direction, the key guide holding plate 18 and the swing support frame 16 integrated with the key guide 19 oscillate in the same direction, and the second boots 12 is displaced in the key arranging direction. The flat springs 13 and 14 elastically deform the first elastic member 15 in the key arrangement direction.

At the rear end of the swing support frame 16, a protrusion 16c serving as a stopper portion is provided so as to protrude rearward of the key (to the right in FIG. 1), and the protrusion 16c is provided on the fourth fixed support frame. 2 is provided in the hole 4a formed in the hole 4a so as to be movable in the key arrangement direction so that the swingable range of the swing support frame 16 in the key arrangement direction is restricted. ing. That is, the fourth fixed support frame 4 is moved by the hole 4a into the swing support frame 16
Therefore, a stopper portion that restricts the swinging of is formed.

Further, as shown in FIG. 2, a detecting member 20 which is a sensor supporting member is fixed to the outer surface of the flat spring 13 of the first elastic member 15 by a screw, and a first sensor 21 is attached to the flat plate. It is attached so as to contact the outer surface of the spring 13. The detection member 20 includes a support piece 20a that faces the deformation amount detection position of the first elastic member 15 and supports the first sensor 21, and the support piece 20a at a predetermined distance from the flat spring 13. The first elastic member 15 is directly fixed to the first elastic member 15 via the mounting portion 20b.

As described above, the first sensor 21 is interposed between the first elastic member 15 and the supporting piece of the detecting member 20 provided at a predetermined distance from the first elastic member 15. It is mounted so as to detect a change in the gap between both members, and detects the operating force of each key 6 or the component of the displacement in the key arrangement direction by the elastic deformation amount of the first elastic member 15.

As the first sensor 21, for example, a reflection type sensor as shown in FIG. 5 is used. This reflection type sensor 50 is provided with a cover 51 made of an elastic material such as synthetic rubber (silicon resin) on a substrate 52, and a light emitting element 53 and a light receiving element 54 are provided on the substrate 52 inside thereof. The reflective surfaces 51a are arranged on the inner surface of the upper portion of the cover 51 at intervals.
Is formed.

The light emitted from the light emitting element 53 is reflected by the reflecting surface 51a and is received by the light receiving element 54, and a signal corresponding to the amount of light received is output. Therefore, when the pressure receiving portion 51b of the cover 51 is pressed and the cover 51 is elastically deformed, the reflecting surface 51a thereof is displaced, so that the light receiving amount of the light receiving element 54 is changed and the output signal is changed.
The displacement of the member pressing the pressure receiving portion 51b can be detected. In order to cause such an action, pre-tension is applied to the holding of the first sensor 21 between the member 20 and the flat spring 13, and the first sensor 21 is fixed to the member 20. First
As the sensor 21, a pressure sensor, a strain gauge, a load cell, or the like can be used in addition to the reflective sensor.

The key swing unit assembly 10 is arranged on the first fixed support frame 1 as shown in FIG. 1 and FIG. The members 11, 11 are positioned and fixed and attached. Each first boot-shaped member 1 of the first fixed support frame 1
At the mounting position of No. 1, two long holes 1 along the direction in which two keys are arranged for inserting the screws 9 as shown in FIG.
a and 1a are formed at intervals in the longitudinal direction of the key, and when the first boots-like member 11 is fixed to the first fixed support frame 1 by the screw 9, the position in the key arrangement direction indicated by the arrow G. Is adjustable. As a result, the movable range of the entire key swing unit assembly 10 in the key arrangement direction can be adjusted.

On the other hand, on the third fixed support frame 3, between the fourth fixed support frame 4 and the second fixed support frame 3, as shown in FIG.
The elastic member 30 is attached with the root portion 30a interposed therebetween. The second elastic member 30 is provided with a plurality of slits 31 in a flat elastic member as shown in FIG.
A large number of elastic pieces 30 corresponding to each key and extending in the key tip direction
1, 302, 303, ... Are formed side by side, and the respective elastic pieces are connected to each other at the root portion 30a, and the root portion 30a is immovable on the second elastic member 30 in the key pressing direction. Fixed to.

These elastic pieces 301, 302, 303, ...
As shown in FIG. 3A, the second sensor 22 is attached to the lower surface of the so as to sandwich the second sensor 22 between the member 32 and the elastic member 30 via the sensor support member 32, and each key 6 is attached. The operating force or the component of the displacement in the key pressing direction is detected by elastic deformation of the elastic pieces 301, 302, 303 ,.

The sensor support member 32 includes a support piece 32a that supports the second sensor 22 so as to face the lower surface of the middle portion of each elastic piece, and the support piece 32a, for example, the elastic piece shown in FIG. 301 (FIG. 3) is a cantilever-shaped member including a mounting portion 32b that also serves as a spacer for fixing the elastic piece 301 at a position close to the root portion 30a at a predetermined distance. It is fixed directly on the elastic member 30. When a sensor of a certain key is displaced by such a sensor mounting structure, even if the elastic piece next to the key is displaced, the sensor output will not be generated unless the tip of the elastic piece is pressed, and the key is displaced. It is devised so that the output of only the sensor by will appear.

As the second sensor 22, as in the case of the first sensor 21 described above, for example, a reflection type sensor 50 as shown in FIG. 5 is used. Alternatively, a pressure sensor, a strain gauge, a load cell, or the like can be used instead of the reflective sensor.

Thus, the key swing unit assembly 1
0 is mounted on the first fixed support frame 1, and the second elastic member 3
0 is mounted on the third fixed support frame 3, and the key frame 5 is mounted on the second fixed support frame 2 and the fourth fixed support frame 4, and the keys 6 are locked one by one with the key return springs 8 spring-locked. Part 6b
Then, as shown in FIG. 1, it is assembled in a state where it is temporarily locked by the temporary locking portion 6c.

Then, in the built-in state of each key 6,
The elastic piece 301 corresponding to each key 6 of the second elastic member 30 corresponds to the C key, 302 corresponds to the B key, and 303 corresponds to the A # key. It is for pitch keys. The width Wb of the elastic piece for the black key such as 303
Is narrower than the width Ww of the elastic pieces for white keys such as 301 and 302.

An actuator portion 60 bent in an L-shape is vertically provided by fitting or integrally molding (fitting in the example of FIG. 1) at a lower portion of each key 6 near the front end portion. The actuator section 6
A groove 61 that is open backward and extends along the key longitudinal direction is formed in a portion 60a that is bent backward in the key longitudinal direction of 0,
An elastic piece for each key (301 in FIGS. 1 and 3) is provided in the groove 61.
Insert the tip (free end) of. A stopper portion 60b is provided on the lower surface of this groove, and a pressing portion 60c is provided on the upper surface.

The front end bent portion 1b of the first fixed support frame 1
An inverted L-shaped stopper member 25 is attached to the base plate 1 by a screw 26 inserted in a long hole 25a that is long in the vertical direction so that the position of the stopper member 25 can be adjusted in the vertical direction. The stopper member 25 has elastic pieces 301, 302, 303, ... Even if an abnormal force is applied to the key 6 beyond the playing range.
Alternatively, the key return spring 8 is provided in order to stop the lowering of the key 6 by abutting the lower surface of the actuator portion 60 so as not to cause plastic deformation.

Here, the operation of detecting the key pressing force of each key 6 will be described. For convenience of explanation, the key 6 (C key) and the elastic piece 301 for C key shown in (a) of FIGS. 1 to 3 will be described, but the same applies to other keys.

When the key is not pressed, the key return spring 8 and the elastic piece 30 are
By the balance with 1, the elastic piece 301 is displaced upward from the completely open state, and in this state, the upper limit stopper portion 60b of the actuator portion (also a stopper piece) 60 provided on the key 6 of the elastic piece 301. Free end bottom surface 30
1a.

In this state, the depressed portion 60c of the actuator portion 60 and the depressed portion (the upper surface of the free end) 3 of the elastic piece 301.
01b, there is a gap having a distance D1 shown in FIG. 1 and FIG. 3A (this is referred to as a first awning), and this gap is a dead zone for the elastic piece 301. Its value is 1
It is about 2 mm. As the key is pressed, the pressing portion 60c contacts the pressed portion 301b. At this time, the force required to depress the key, that is, the force required to digest the first awning D1 is preferably about 50 to 60 g in view of the acoustic piano.

The stroke that can be lowered until the actuator portion 60 contacts the stopper member 25 after the pressing portion 60c contacts the pressed portion 301b is determined by the distance D2 shown in FIG. 3 (b). This distance D2 corresponds to the second stride. This distance D2 is about 7 to 8 mm, and the force corresponding to the maximum displacement is about 2 kg. The component of the operation force of the key 6 in the key pressing stroke in the key pressing direction is
The shape is changed to “displacement” due to elastic deformation of the elastic piece 301, and is detected by the second sensor 22.

It is supposed that D1 + D2≈allowable key pressing stroke, but actually, this allowable key pressing stroke is 10
In the case of mm, D1 + D2 is about 9 mm. It is understood that the reason is that the displacement is added to the stroke until the pretension of the elastic piece 301 at the initial stage of key depression is released.

Here, the main features of the keyboard device described above,
The action and effect thereof will be described. A first feature of this keyboard device is a swing support frame 16 and a first member, which are members for detecting a component of a key operating force or displacement in a key arrangement direction.
The key swing unit assembly 10 including the elastic member 15 and the first sensor 21, and the second elastic member 30 and the second sensor 22 which are members for detecting a component in the key pressing direction. Separately and independently fixed support frame (first fixed support frame 1
And the third fixed support frame 3) is individually supported.

As a result, the swing support frame 16 only supports the key guide 19 for each key 6, does not need to support the second elastic member 30 and receives no key pressing force. It is possible to reduce the weight including the members. Therefore, the mass of the entire member that swings in the key alignment direction can be reduced, and operability and responsiveness can be improved.

Further, no detection signal is generated in the second sensor 22 when the rocking support frame 16 rocks in the key arrangement direction. That is, the first sensor 21 and the second sensor 22 can independently and accurately detect the component in the key arrangement direction and the component in the key release direction of the key operating force or displacement without being influenced by each other. it can. Furthermore, the swing support frame 1
Since the cantilevered support 6 and the second cantilevered support of the second elastic member 30 do not have a folded structure and are formed so as to project in opposite directions, the accuracy is improved and the design and assembly are facilitated. .

The second feature is that when the key 6 is in the return position as shown in FIG. 1, the pressing portion 60c of the actuator portion 60 of the key 6 and the pressed portion of the second elastic member 30 (see FIG. 1).
For the C key shown in FIG.
1b) with a gap of distance D1 between the second key
That is, a dead zone for elastic deformation of the elastic member 30 is formed. As a result, it is possible to prevent a musical sound from being generated by detecting the operating force or displacement of the key 6 even if the player unintentionally or preliminarily touches the key 6. To do this, the sensor 22 may be set on the support member 32 without applying pre-tension. Also,
If set by giving pre-tension, a sensitive sensor structure with no dead zone can be obtained.

The third characteristic is that the second elastic member 30 has
Each key is provided with an elastic piece that elastically deforms in the key pressing and releasing direction according to the operating force of each key 6, and a second sensor 22 that detects the displacement due to the elastic deformation of each elastic piece is provided for each key. That is. Thereby, the operation force or the component of the displacement in the key pressing direction of each key 6 can be individually detected without being affected by the operation of other keys.

That is, the sensing mechanism of the own key does not affect the sensing mechanism of other adjacent keys. For example, assume that the B key is pressed and the elastic piece 302 in FIG. 2 is displaced. Since the sensor support member 32 is provided on the elastic piece 301, even if the key pressing force wraps around via the root portion 30a, the adjacent elastic piece 3 for C key is used.
Even if the elastic piece 303 for 01 or A # key is displaced to some extent, the wraparound force does not affect the attachment part of the sensor support member 32, because it is a base stop of each piece.

To explain this reason in the most intuitive way, if the middle finger of the hand is bent from the base, the adjacent finger is also slightly pulled in. However, even in this case, the tip of the retracted finger is not affected. It is similar to this phenomenon.

The fourth characteristic is that a large number of elastic pieces 301, 302, 303, ... Corresponding to each key 6 of the second elastic member 30.
, And a large number of slits 3 on an elastic member such as a flat plate spring.
, 31, ... are formed in parallel by forming comb teeth, and the root portions 30a of the elastic pieces are joined together.
Is fixed to the third fixed support frame 3.
As a result, a large number of elastic pieces can be easily formed at one time, which simplifies the manufacturing process and simplifies the assembling thereof, thus reducing the cost.

Further, the load-displacement characteristics of each elastic piece can be made different from each other. In the above-described embodiment, the width of the white key elastic pieces (301 and 302 in FIG. 2) is larger than the width of the black key elastic pieces (303 in FIG. 2) (Ww>
Wb), the same sensor output can be obtained with the same key pressing force even if the white key and the black key have different key pressing positions (distance from the fulcrum of the key). In this case, the thickness of each elastic piece is constant.

Further, in the illustrated example, the tooth length of the comb teeth, that is, the length of each elastic piece 301, 302, 303, ... Is changed according to the pitch as shown by the distance D4 in FIG. The load-displacement characteristic is changed by gradually shortening as it goes down. For example, in order to obtain the same sensor output, it is set that the low tone side needs to be pressed more strongly than the high tone side. This feature is called the key scaling technology of touch feeling of the key.

As another method, a second elastic member 30 may be prepared and provided with elastic pieces having different load-displacement characteristics for each key group (every octave or every half octave). In that case, no key scaling is performed within the same elastic member. The second elastic member 3 is provided for each key group.
When arranging 0, the white key group and the black key group may be separated and set at the time of assembling. The white key and the black key may have different lengths (cut lengths) of the slits 31 so that the same pressing force is applied to the black and white keys at the key operating position.

A fifth feature is that the first sensor 21 for detecting the key operating force or the component of the displacement in the key arrangement direction is provided for detection with the first elastic member 15 and a predetermined distance from the first elastic member 15. That is, it is interposed between the member 20 and the change in the distance between both members, and the detecting member 20 is directly fixed on the first elastic member 15. by this,
First elastic member 1 sensed by the first sensor 21
The displacement due to the elastic deformation of 5 can be clearly defined by the detection member 20 and the first elastic member 15. This improves the detection accuracy.

In the illustrated example, two first elastic members 15 (13, 1) for allowing left and right movement are provided on one side of the keyboard.
4) Since the key swing unit assembly 10 is supported by two flat springs, a total of four flat springs on the other side, it is easy for the key swing unit assembly 10 to move in parallel (S-shaped deformation during displacement), and the accuracy of the move is improved. There is. In addition, the swing range is the same as that of the screw 9 and the first screw shown in FIG.
It can be adjusted by the elongated hole 1a of the fixed support frame 1. This allows the key to move sideways (left and right strokes)
Can be set in a balanced manner even if the dimensional accuracy of the keyboard device is reduced. The adjusting mechanism is not limited to this, and may be provided anywhere between the fixing members (a plurality of fixing members) as shown in the drawing.

A sixth feature is that a part of the fourth fixed support frame 4 restricts the swing of the swing support frame 16 (a hole 4a).
And a stopper portion (projection 16c) whose swingable range is restricted is formed on the swing support frame 16 by a fourth portion.
It is provided so that the position can be adjusted with respect to the fixed support frame 4 in the key arrangement direction (by the screw 17 and the long hole formed in the swing support frame 16).

[0064]

As described above, the keyboard device for an electronic musical instrument according to the present invention includes a rocking member such as a rocking support frame for detecting a component of a key operating force or displacement in the key arrangement direction, An elastic member for detecting the component in the key release direction,
Since they are separately and independently supported by the fixed support frame, it is possible to reduce the mass of the entire member that swings in the key arrangement direction, and it is possible to improve operability and responsiveness.

Further, the first sensor and the second sensor are capable of independently and accurately detecting the component of the key operating force or displacement in the key arrangement direction and the component in the key releasing direction without being influenced by each other. You can Furthermore, since the cantilever support of the swing support frame and the cantilever support of the second elastic member do not have a folded structure and are formed so as to project in mutually opposite directions,
The accuracy is improved and the design and assembly are facilitated.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing together different cross sections along a key longitudinal direction of a keyboard device for an electronic musical instrument showing an embodiment of the present invention.

FIG. 2 is a plan view showing only the vicinity of an end portion on the treble key side in a state in which an upper half portion of the keyboard device is removed.

FIG. 3 is a sectional view taken along line BB of only the lower half portion shown in FIG.

FIG. 4 is a partial bottom view seen from the arrow S direction in FIG.

FIG. 5 is a cross-sectional view showing an example of first and second sensors used in the keyboard device of the present invention.

[Explanation of symbols]

1 ... 1st fixed support frame, 2 ... 2nd fixed support frame, 3 ... 3rd fixed support frame, 4 ... 4th fixed support frame, 4a ... Hole (stopper part), 5 ... Key frame, 6 ... Key, 6a ... Engagement protrusion, 6b
... Spring locking portion, 6c ... Temporary locking portion, 6d ... Side wall, 7 ... Spring receiving member, 8 ... Key return spring, 9 ... Screw, 10 ... Key rocking unit assembly, 11 ... First boots-like member, 12 … Second
Boots-shaped member, 13, 14 ... Flat spring, 15 ... First elastic member, 16 ... Swing support frame, 16c ... Projection (stopped portion), 17 ... Screw, 18 ... Key guide holding plate, 19 ... Key guide , 20 ... Detecting member, 20a ... Supporting piece, 20b ... Mounting part, 21 ... First sensor, 22 ... Second sensor, 25
... Stopper member, 25a ... Long hole, 26 screw, 30 ... Second
Elastic member, 30a ... Root, 31 ... Slit, 32 ...
Sensor support member, 32a ... Support piece, 32b ... Attachment part, 5
0 ... Reflective sensor, 51 ... Cover, 51a ... Reflective surface, 5
1b ... Pressure receiving portion, 52 ... Substrate, 53 ... Light emitting element, 54 ... Light receiving element, 60 ... Actuator portion, 60b ... Stopper portion, 60c ... Depressing portion, 301, 302, 303 ... Elastic piece, 301a ... Free end lower surface, 301b ... Pressed part (top of free end)

Claims (13)

[Claims] 1. A fixed support frame fixed to the main body of the musical instrument, and a key guide for guiding the pressing and releasing keys, which is substantially immovable in the pressing and releasing direction with respect to the fixed supporting frame and is swingable in the key arrangement direction. A swing support frame having a fulcrum side, a plurality of keys each having one end on a fulcrum side rotatably held by the fixed support frame, and being guided by the key guide at a key guide corresponding portion distant from the fulcrum, A first elastic member that connects the fixed support frame and the swing support frame, and that elastically deforms in the key arrangement direction, and a key arrangement direction component of the operating force or displacement of the key, is elastic by the first elastic member. A first sensor that detects the amount of deformation; a second elastic member that has one end fixed to the fixed support frame and that elastically deforms in the key pressing and releasing direction according to the operating force of the key; The component of the displacement in the key release direction is the elastic deformation amount of the second elastic member. The second elastic member and the swing support frame are separated from each other, and a detection signal is sent to the second sensor when the key swings in the key alignment direction. A keyboard device for an electronic musical instrument characterized by being prevented from occurring. 2. When the key is in the return position, a gap in the key pressing direction is provided between the key and the second elastic member,
The keyboard device for an electronic musical instrument according to claim 1, wherein a dead zone is formed against elastic deformation of the second elastic member when a key is pressed. 3. The keyboard device for an electronic musical instrument according to claim 1, wherein each of the keys is, as the second elastic member, an elastic piece elastically deformed in a key pressing direction according to an operating force of the key. And the root portions of the plurality of elastic pieces are connected to each other, and are elastically deformed by receiving the key pressing force of each key on the free end side of each elastic piece, and as the second sensor, A keyboard device for an electronic musical instrument, wherein a sensor for detecting a displacement due to elastic deformation of each elastic piece is provided for each key. 4. The keyboard device for an electronic musical instrument according to claim 3, wherein a sensor that detects a displacement due to elastic deformation of each elastic piece is provided via a sensor supporting member, and each sensor supporting member is the above-mentioned. A keyboard device for an electronic musical instrument, which is fixed to each elastic piece. 5. The plurality of elastic pieces are formed in parallel by forming a plurality of slits in a flat elastic member to form comb teeth, and the root portions of the elastic pieces connected to each other are pushed apart. The keyboard device for an electronic musical instrument according to claim 3 or 4, wherein the keyboard device is connected to the fixed support frame so as to be fixed in the key direction. 6. The keyboard of an electronic keyboard instrument according to claim 3, wherein the second elastic member has a plurality of types of elastic pieces having different load-displacement characteristics. apparatus. 7. The load of each elastic piece of the second elastic member-
7. The keyboard device for an electronic keyboard musical instrument according to claim 6, wherein the displacement characteristic is configured to change continuously or stepwise according to the pitch. 8. The plurality of elastic pieces of the second elastic member,
The keyboard device for an electronic keyboard musical instrument according to claim 6 or 7, wherein the keyboard device has the same thickness and different lengths or widths. 9. The keyboard device for an electronic keyboard musical instrument according to claim 1, wherein the first sensor has a predetermined distance from the first elastic member and the first elastic member. And a detection member provided so as to be separated from the first elastic member, the detection member being directly fixed on the first elastic member. A keyboard device for an electronic musical instrument, which is characterized in that 10. The detection member is a sensor support member for fixing and holding the first sensor, and supports the first sensor so as to face a deformation amount detection position of the first elastic member. It is a member having a cantilever shape, which includes a support piece and an attachment portion that also serves as a spacer for fixing the support piece to the first elastic member at a predetermined distance from the first elastic member. The keyboard device for an electronic musical instrument according to claim 9, wherein: 11. The keyboard device for an electronic musical instrument according to claim 10, wherein the attachment portion of the sensor support member is fixed near the base end portion of the first elastic member. 12. The keyboard device for an electronic keyboard musical instrument according to claim 1, wherein a part of the fixed support frame forms a stopper portion that restricts swing of the swing support frame, and the swing support frame. A keyboard device for an electronic musical instrument, characterized in that a stopper portion whose swingable range is restricted is provided so that its position can be adjusted with respect to the fixed support frame in the key arrangement direction. 13. A hole is formed in the fixed support frame, the stopper portion has a protrusion, and the protrusion is inserted into a hole formed in the fixing member so as to be swingable in a key alignment direction, The keyboard device for an electronic musical instrument according to claim 12, wherein the rockable range of the rocking support frame in the key arrangement direction is restricted.