JPH07271346A - Keyboard device for electronic musical instrument - Google Patents

Abstract

PURPOSE:To improve the productivity by realizing key scaling on the electronic keyboard musical instrument with a touch feeling by simple and inexpensive structure. CONSTITUTION:The keyboard device for the electronic musical instrument has many-key return springs 10 formed integrally with a key support member 3. The tip 18 of each key return spring 10 is engaged with the spring support member 17 of a key 1 and curved in a convex shape to energize the key 1 in its return direction. Each key return spring 10 is made gradually narrow in width from the low-tone side to the high-tone side to vary the spring constant, and consequently the key scaling with the touch feeling is enabled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device of an electronic musical instrument, and more specifically, a touch-sensitive key of a keyboard for different touch feeling or the like at the time of key operation for each key or key group of the keyboard. It's about scaling.

[0002]

2. Description of the Related Art Acoustic pianos have an action mechanism that transmits the movement of a key to the strings. Generally, the physical mechanism is such that the touch becomes heavier toward the bass and lighter toward the treble. It is configured. In this way, the fingers and hands are put into the low tone range and the high tone range is softened.

Key scaling in a conventional keyboard instrument, for example, an acoustic piano will be described below.
First, the size and hardness of the hammer head differ depending on the length of the string, and the low-pitched hammer head is soft and has a large felt felt. In addition, there are differences in the strength of the spring and the weight of the key itself, which affect the weight (touch feel) of the key. Conventionally, in order to average and adjust the weight of this key as much as possible,
Lead was put in the wood part. As a result, the weight of the key is 50 grams in the high range, 55 grams in the middle range, and 6 in the low range.
The key scale of the reaction force was gradually reduced from the low-pitched part to the high-pitched part so as not to feel the change in weight as 0 gram ("Gifts from the tuner", Yoshitaka Saito, Musica Nova). Published, released by Ongaku no Tomosha).

Other dynamic touch feels are necessarily key-scaled. Touch Feeling People who are familiar with pianos with key scaling are embarrassed because they are not familiar with the touch feel of electronic musical instruments without it.

On the other hand, as a keyboard device for an electronic musical instrument with a conventional touch-and-feel key scaling means, in a keyboard device with a hammer, the key scaling is performed on the distance between the fulcrum of the hammer and the key fulcrum, and between the key tip and the key fulcrum. There is a configuration for key scaling the distance or a configuration for key scaling the distance between the key fulcrum and the rubber switch. By the way, there is a long-standing technology to make the touch pressure (static reaction force) the same for the white key and the black key, but such a technique is an idea contrary to the touch feeling key scaling that the touch feeling is different depending on the key. Technology.

[0006] Conventionally, there have been proposed many configurations in which the key return spring is integrally formed in the shape of a comb. Further, a configuration in which the spring locking portion of the key portion is formed in multiple stages, a configuration in which the spring receiver is formed of resin, and the like have been proposed.

[0007]

The acoustic piano has a complicated structure and is expensive, and this structure cannot be used as it is for an electronic musical instrument that requires a switch process or the like. For example, considering a key that turns on the switch without the piano action mechanism that can be used for electronic musical instruments, a line connecting a plurality of aligned key fulcrum positions and a line connecting the bowl-shaped switch corresponding to each key are mutually connected. It is possible to make it diagonally.

However, if such a configuration is used,
The key-depression sounding position is also key-scaled, and the sounding stroke position of the low-pitched sound portion and the sounding stroke position of the high-pitched sound portion are different. Furthermore, when a 2-make touch response switch is used, the length from the fulcrum is different, so even if the keys are pressed with the same touch force (speed) from the finger, the low-pitched and high-pitched keys differ from the keyboard switch output. Output is output.

The above-mentioned inconvenience arises when attempting to scale the touch feeling in this way using the above-mentioned conventional configuration in which the distance between the key fulcrum and the rubber switch is key-scaled. The current situation is that no mechanism that can be realized has been considered.

Further, if the above-mentioned structure is used, the structure of the switch array, the wiring pattern, etc., the structure of the substrate and the key frame part, the structure of the switch fixing means, etc. become complicated, and the productivity is lowered. Not suitable for.

Further, in all of the conventionally proposed comb-tooth-shaped integrally-formed key return spring structures, no consideration is given to key scaling, or the structure is such that the spring rattles or the assembly workability is poor after long-term use. There was a problem. Further, also in the previously proposed key structure in which the spring locking portion is multi-staged and the structure in which the spring receiver is formed of resin, similarly, there is consideration for changing the touch feeling between the high-pitched sound portion and the low-pitched sound portion of the key. Alternatively, there was a problem such as noise due to rattling of the spring or deterioration of the assembling property.

In view of the above situation, the present invention can perform key scaling of a touch feeling similar to the key touch feeling of an acoustic piano while maintaining the basic function as a keyboard device with a simple structure, and further, assembling. An object of the present invention is to provide a keyboard device for an electronic musical instrument, which can improve workability and productivity.

[0013]

In order to achieve the above object, a keyboard device for an electronic musical instrument according to a first invention (Claim 1) of the present application has a key support member and the key support by pressing and releasing keys. A number of keys that are displaced with respect to the member, key touch feel key scaling means integrally formed on the key support member, one end of the key locking portion, and the other end of the key scaling means is locked by the key scaling means. Is provided with a key return spring for returning to the initial position when the key is not pressed, and the touch feeling of each key is key-scaled as a whole keyboard.

The second invention of this application (Claim 2)
An electronic musical instrument keyboard apparatus according to the present invention, a key support member, a number of keys that are displaced with respect to the key support member by a key press operation, and a key touch feel key scaling fixed to the key support member by a fixing means. Means and one end to the locking part of each key,
The other end is locked to each locking part of the key scaling means, and provided with a key return spring assembly for sharing a large number of keys to give each key a returning habit. The key scaling means has a base part common to a plurality of keys. It is characterized by comprising a spring support member.

In a preferred embodiment, the key scaling means is characterized by changing the width of the leaf spring.

In another preferred embodiment, the key scaling means is characterized in that it is configured to change the angle formed by the plane of the key support member and the leaf spring.

In yet another preferred embodiment, the key scaling means is characterized in that it is configured to change the length of the spring.

In still another preferred embodiment, the key scaling means is characterized in that it is configured to change the cross-sectional area of a plane perpendicular to the longitudinal direction of the spring.

In still another preferred embodiment, the key scaling means is formed by resin outsert.

In still another preferred embodiment, the key scaling means is formed so that the reaction force of the white key becomes large so that the reaction force of the black and white keys approaching at the tip of the key is the same as that of the white key and the black key. It is characterized by being done.

In yet another preferred embodiment, the key scaling means and the spring assembly are integrated and are fixed to the key support member by resin outsert.

In yet another preferred embodiment, the key scaling means is characterized in that the height of the spring support portion provided on the fixed side of the key support member or the like is changed.

In yet another preferred embodiment, the key scaling means is a spring receiving height change setting means, which is integrally formed on the key support member by resin outsert. .

In still another preferred embodiment, the key scaling means is a spring receiving height change setting means, which is integrally formed by press working on the relevant portion of the key supporting member. There is.

In still another preferred embodiment, the key scaling means is characterized in that one end of the tension spring is supported on the key side and the other end is supported on a portion where the rear end of the key support member is formed obliquely. I am trying.

[0026]

According to the first aspect of the present invention, the key touch feeling key scaling means is integrally formed with the key support member, and the touch feeling of each key is key-scaled as a whole keyboard. It is possible to obtain a key touch feeling similar to the key touch feeling and improve productivity.

According to the second aspect of the present invention, there is provided a key return spring assembly for sharing a large number of keys, one end of which is engaged with the engaging portion of each key and the other end is engaged with the engaging portion of the key scaling means. It is stopped and gives each key a habit of returning. Further, the base portion of the key scaling means is supported by a spring supporting member that is common to a large number of keys. As a result, a key touch feeling similar to that of an acoustic piano is obtained, and production efficiency is further improved. Further, since the frame (key support member) and the key return spring are separately provided for key scaling, the degree of freedom in design is increased. The invention according to claim 2 not only achieves the main object of touch-and-touch key scaling similar to that of an acoustic piano, but also has very little spring noise due to rattling of the spring even after long-term use, and is assembled. A keyboard device with good workability can be obtained.

According to the inventions of claims 3, 4 and 5, as a preferred embodiment, the touch feeling key scaling action is performed by changing the width of the leaf spring, the angle formed by the plane of the key supporting member, or the length. Be seen. As a result, a keyboard device having a touch-and-touch key scaling function that is simple and has high productivity can be obtained.

According to the invention of claim 6 as another preferred embodiment, the touch feel key scaling action is performed by changing the spring cross-sectional area of the leaf spring. As a result, the same effect as the above embodiment is achieved, and the key,
A keyboard device having a key scaling function with excellent productivity can be obtained without increasing a special additional step by adding a function of key scaling such as a frame.

According to the invention of claim 7 as yet another preferred embodiment, the touch feel key scaling means is formed by a resin outsert molding method. This further improves productivity.

According to the invention of claim 8 as yet another preferred embodiment, the reaction force of the white key is adjusted so that the reaction force of the black and white keys approaching the white key and the black key at the tip of the key becomes the same. Is larger than the reaction force of the black key. As a result, all keys have the same spring material (including the white key and the black key) to perform the key scaling action, and the adjacent white and black keys can obtain substantially the same reaction force with the same touch force. .
As a result, a keyboard device having a key scaling function that is simple and has high productivity can be obtained.

According to the invention of claim 9 as yet another preferred embodiment, the related members of the key (all of the key scaling means, the key return spring, and the frame side spring supporting portion).
Since it can be integrated as an outsert, it is possible to obtain a keyboard device which has a degree of freedom in design and is highly productive while achieving the key scaling action of the key touch feeling, which is the main purpose described above.

According to the invention of claim 10 as yet another preferred embodiment, the key scaling action is achieved by changing the height of the spring support portion on the fixed member side. As a result, it is possible to obtain a keyboard device which achieves the key scaling effect of the key touch feeling described above, which is the main purpose, and which has good workability. In addition, it is possible to obtain a structure that does not cause the spring to fall off or mechanical noise.

According to the inventions of claims 11 and 12 as still another preferred embodiment, the key scaling means is integrally formed on the key support member by outsert or press working of resin. According to this, the claim 10
The same effect as that of the embodiment can be obtained.

According to a thirteenth aspect of the invention as a further preferred embodiment, the end portion of the tension spring is supported by the oblique portion of the rear end portion of the key support member to perform the key scaling action. Thereby, like the embodiment of claim 8,
It is possible to obtain a keyboard device having a key touch feeling key scaling function which is simple and has high productivity.

[0036]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. In addition, in common with each of the embodiments, the same constituent elements are designated by the same reference numerals in the drawings.

Each embodiment will be described below with reference to FIGS. 1 to 23. However, since there are various embodiments, the correspondence between the drawings and the claims will be specified in advance. 1 to 5 and 16 to 19 support claim 1. 6 to 10 and 20 to 23 support claim 2. FIG. 1 further supports claim 3. FIGS. 3, 5 and 11 to 14 support claim 4. 8 and 9 support claim 5. FIG. 10 supports claim 6. FIG.
16 to 16 support claim 7. FIG. 16 supports claim 8. 6, FIG. 7, FIG. 9, FIG. 20, and FIG.
And FIG. 23 supports claim 9. 13 and 1
4 and FIG. 16 support claims 10 and 11. 11, 12 and 17 support claim 12. 18 and 19 support claim 13.

1 and 2 show a first embodiment of the present invention. FIG. 1 is a perspective view of a keyboard device key supporting member for an electronic musical instrument, and FIG. 2 is a sectional view taken along the longitudinal direction of the key. In FIGS. 1 and 2, 1 is a white key, 2 is a black key, and 3 is a key support member (frame) that swingably supports the white key 1 and the black key 2. In the figure, a pair of keys (white key 1,
Although the black keys 2) are shown, these keys are arranged in parallel in the direction perpendicular to the paper surface, and the key supporting member 3 supports all the keys 1 and 2 swingably. Further, since the white key 1 and the black key 2 are different in size from each other but have substantially the same configuration, the following description will be made only for the white key 1 unless otherwise specified.

First, the structure of the keyboard device other than the features of the present invention will be briefly described. The front end portion side (player side) of the key support member 3 is bent to form a labial edge portion 4. A lower limit stopper 5 and an upper limit stopper 6 made of a felt material are pasted on the upper surface and the lower surface of the key support member 3 on the back side thereof. These lower limit stopper 5 and upper limit stopper 6
Corresponding to, a bending locking piece 8 is formed in an L shape at the end of the slide guide piece 7 provided on the key 1 side.

When the key 1 is pressed by the key pressing operation and descends and the lower end of the bending locking piece 8 of the slide guide piece 7 contacts the lower limit stopper 5, the key pressing operation is stopped, and this position is the key pressing stroke. It is the lower limit position. Further, when the key pressing force is released (when the key is released), the urging force of the key return spring 10 described later causes
The key 1 rises, the upper end of the bending locking piece 8 of the slide guide piece 7 comes into contact with the upper limit stopper 6, and the key pressing return operation is stopped,
This position is the upper limit position of the key depression stroke (state of FIG. 2).

A key guide 11 having a width narrower than the distance between the inner wall surfaces of the slide guide pieces 7 of the key 1 is provided near the lip 4 of the key support member 3 and below each key 1. The key guide 11 is formed by pressing the key support member 3 upright and covering the cut and raised portion 12 with a synthetic resin 13, and supports the above-described vertical movement of the key 1 from both sides. This prevents the key from swinging and twisting when the key is pressed.

The rear end portion 1 of the key 1 is provided at the rear portion of the key support member 3.
Fulcrum hole 15 which inserts 4 and supports this swingably
And a rear edge portion 16 including a part of the fulcrum hole 15 is bent upward to form an upright wall surface. In FIG. 1, the fulcrum hole 15 and the cut-and-raised portion 12 of the key guide 11 are shown.
Are not shown.

In the keyboard device constructed as described above, according to the present embodiment, the key return spring 10 is integrally formed from the key support member 3 by a working method such as press working.
FIG. 1 shows an external perspective view of only the key support member 3 in which the key return spring 10 is formed. As is clear from this figure,
A large number of key return springs 10 are formed so as to correspond to the keys 1 and 2, respectively, and are bent obliquely upward from the rear edge portion 16 side of the key support member 3 toward the labial edge portion 4 side. Further, these key return springs 10 are 1
The spring width gradually decreases for each key, or the spring width gradually decreases for each predetermined number of key blocks (3-4 keys, half octave, 1 octave, melody key / accompaniment key block, etc.). Is press molded. As a result, the spring constant of each key return spring 10 changes for each key or each key block.

As shown in FIG. 2, each key return spring 10 is
The tip 18 of the key 1 is locked to a spring support member 17 which is integral with the key 1. The length of each key return spring 10 is at least the locking portion (contact portion) in the spring base portion 19 and the spring supporting member 17.
It is set to be larger than the straight line distance L to 20. Therefore, all the key return springs 10 are bent upward by being locked with the spring support member 17, and the elastic repulsive force urges the keys 1 in the return direction. Then, the key recovery force from each key return spring 10 gradually decreases for each key or each key block from the low tone side to the high tone side in response to the change in the spring constant described above, and the low tone portion is heavy and the high tone portion is high. You can apply touch-sensitive key scaling to make it lighter.

In the above, the touch feeling is key-scaled by changing the spring width of the key return spring 10 between the keys (or between the key blocks). As an application example, the plane of the key support member 3 is used. The bending process after pressing is adjusted so that the angle formed between the key return spring 10 and each key return spring 10 becomes gradually smaller toward the high-pitched sound side, or each key return spring 10
The press die may be changed so that the spring length of the is gradually increased toward the treble side.

FIGS. 3 and 4 are modifications of the above-described embodiment. FIG. 3 is a sectional view taken along the longitudinal direction of the key, and FIG. 4 is a top view of the keyboard device. In this embodiment, the position of the tip of the key return spring 10, that is, the position of the engaging portion 20 with the spring supporting member 17 is changed by the key, and the elastic reaction force of the spring is changed accordingly. In the figure, C1 indicates the locus of the spring locking portion 20 of the key 1 when the key rotates, and C2 indicates the locus of the spring 10 accompanying the key rotation in the key spring locking portion. In addition, a key fall prevention member 40 is attached to the rear end of the key. Such a fall prevention member 40 can be applied to the embodiment of FIG. The configuration for changing the position of the spring locking portion 20 according to this embodiment can also be used for adjustment, for example, to make the reaction forces of the white key and the black key, which will be described below, the same at the key tips. In this case, in the illustrated example, the solid line spring 10 can be used for the white key, and the dotted line spring can be used for the black key.

It is preferable that the white key 1 and the black key 2 adjacent to each other are set so that the touch feelings at their tips (portions pressed by a finger) are almost the same. Due to the difference in moment between the black key 2 and the black key 2, the spring constant of the key return spring 10 acting on the white key 1 (provisionally referred to as a white key spring) is the key returning spring 10 acting on the adjacent black key 2.
It is preferable to set it larger than that of the black key spring. From this point of view, as a more specific spring constant setting example of the key return spring 10, between the white key spring and the black key spring,
Similar to the first embodiment and its application example, (1) the spring width level is changed (white key spring: large width, black key spring; small width) (2) key support member 3 and key return spring 10 Change the angle (white key spring: large angle, black key spring: small angle) (3) Change the spring length (white key spring: short, black key spring:
It is preferable to adjust the length).

FIG. 5 shows one of the above-described application examples. For an electronic musical instrument having a melody key (for high range) and an accompaniment key (for low range), for example, each key is On the other hand, the touch feeling is key-scaled. That is, specifically, all of the spring widths of the key return springs 10 formed on the key support member 3 are made constant, or the spring widths of the white key spring and the black key spring are made constant, and then the key scaling is performed. As means, the angle formed by the key support member 3 and the key return spring 10 is changed, and as shown in FIG. 5, the angle b of the key return spring 10B corresponding to the melody key is the angle of the key return spring 10A corresponding to the accompaniment key. It is set to be smaller than a.

Further, each key return spring 10A, 10B.
The tip of the key is bent into a hook shape as shown in the figure so that the tip bending angle A of the key return spring 10A is smaller than the tip bending angle B of the key return spring 10B. This is because the lock portions 20 of the spring support member 17 on the key side are provided by the number of steps, and a stable locked state is provided for each of the key return springs 10A and 10B. This is aimed at the effect that the melody key and the accompaniment key can be molded with the same mold, and the effect of preventing the key return springs 10A and 10B and each spring support member 17 from being assembled incorrectly.

Regarding these bending angles, in the key return spring 10A, the angle A is made to substantially coincide with the tangential direction of a circle centering on the spring base 19 (the radius is the distance between 18 and 19 in FIG. 5). Set (for example, A: 80-9
Bending angle B> angle A in the key return spring 10B. As a result, the bending angle relationship (A <B, b <a) of each part of the key return springs 10A and 10B
As a result, the set positions of the formal key return springs 10A, 10B are clarified, and even if they are set in different places by mistake, due to the unnaturalness of the locked state (the spring characteristic of the free end of the key return spring is The non-conformance can be easily recognized.

6 to 8 show a second embodiment of the present invention. In the first embodiment, the key return spring 10 is the key support member 3
The key return spring 10 is composed of a completely separate component, and is fixed to the key support member 3 here. The key return spring 10 is composed of a comb-shaped elongated leaf spring, and is configured as an integrally formed spring body in which each tooth is locked to the key 1. In addition, when mounting on the key support member 3, as shown in FIG. 7, after the integrated type pin 21 protruding downward is inserted into a small hole 22 formed in the key support member 3 and temporarily fixed. , The root is fixed by covering with a synthetic resin block 23 formed by outsert molding. Further, the key return spring 10 is configured such that the portion outside the synthetic resin block 23 is bent upward, and the tip end thereof is locked to the inner wall surface of the rear end portion 14 of the key 1 in a curved state.

The synthetic resin block 23 that partially covers the key return spring 10 has a front edge 23a, as shown in FIG.
Are formed so as to be oblique to the edge line of the rear edge portion 16 of the key support member 3. As a result, the coating length of each key return spring 10 gradually increases from the high-pitched sound side to the low-pitched sound side, and the substantial spring length is shortened and the spring constant is increased. Regarding this key scaling unit, it goes without saying that the front edge 23a of the block 23 is stepped in addition to the illustrated one key, and every 3 to 4 keys, a half octave, an octave, or a melody key / accompaniment key. The spring constant may be changed stepwise, such as for each block. Regarding the method for fixing the key return spring 10, instead of the synthetic resin block 23, screws are respectively screwed at the set substantial spring length positions.
Similarly, the spring constant may be changed. Also, the attached key return spring 10 does not have to be one spring body, and for example, as shown in FIG. 9, for every 3 to 4 keys, half octave, 1 octave, melody key / accompaniment key block. And the spring length is changed for each block unit on condition that the spring constants of only the white and black keys are changed in the unit of the integrally formed unit. good. Note that 41 and 4 in FIG.
2 is a pawl for locking.

If the key scaling means (key return spring) having a separate structure from the above-mentioned structure is integrally formed with the frame (key support member) by press working or plastic injection molding, it will be included in the first embodiment. Become.

FIG. 10 shows an embodiment in which the thickness of the key return spring 10 is thicker on the low tone side and thinner on the high tone side (t2 <t1).
When the key return spring 10 is composed of a plurality of parts as in the embodiment of FIG. 9, as shown in FIG. 10, in addition to the spring width, spring angle, spring length as spring constant parameters, the thickness of the spring itself is set. You can also scale the touch feeling by changing it.

20 and 21 show a modification of the second embodiment. In this case as well, the key return spring 10 is composed of a component different from the key support member 3 as in the second embodiment, and is released in a state where the locking claw 25 formed on the base portion 24 is inserted into the key support member 3. The base 24 is gradually separated from the surface of the key support member 3 from the low-pitched key side to the high-pitched key side so that the spring engaging with the high-pitched key is closer to the key. Is formed.
For this reason, a large number of locking claws 25 are formed on the key return spring 10 along the keyboard crossing direction, and the outer shape thereof is such that the height of the shoulder portion 25a located on the key support member during assembly is
It is set gradually longer toward the treble keys. In this embodiment, both the base portion 24 of the key return spring 10 and the key support member 3 are provided with resin wrapping holes 26 and 27 for block molding.
Many blocks are formed and block 23 at the time of outsert molding
The key return spring 10 is securely fixed by. As described above, the base portion 24 of the key return spring 10 is attached to the key by tilting in the height direction so that the height gradually changes with respect to the upper surface of the key support member 3 along the direction in which the keys are arranged. The initial setting load of the key return spring 10 to be locked can be changed between the springs, and the touch feeling can be key-scaled by this difference. The key scaling for changing the spring height is performed by the key return member 10 from the key support member 3.
Similarly, the present invention can be applied to the keyboard structure in which the press bending process is adjusted so that the height of each base portion 24 changes for each block as shown in FIG. In addition, the method of fixing the key return spring 10 with the resin block 23 is not adopted, and as shown in FIG. 23, the key return spring is so set that the base portion 24 of each spring gradually rises from the low tone side key to the high tone side key. The 10 itself may be formed of an outsert molded product made of a resin material.

The above-described second embodiment and its modification are
Although the base height of the key return spring is changed between the keys, the key return spring and the key support member are formed separately and are formed on the side of the key support member in that the same effect is obtained. Even if the height of the support portion (locking and holding portion) of the key return spring is changed, the touch feeling can be similarly key-scaled.

11 and 12 show a third embodiment of the present invention in which the height of the spring engaging portion of the key support member is changed as such a key scaling means. Here, the spring locking portion 28 of the key return spring 10 on the key support member 3 side.
Is bent slightly downward from the surface of the key support member 3 in the high-pitched side key by press working, and is bent downward as it goes toward the lower-pitched side. As a result, the bending degree of the key return spring 10 is increased on the low tone side, and the elastic repulsion force is increased.

FIGS. 13 and 14 show a fourth embodiment, in which the key return spring 10 is supported by a spring support member 29 integrally formed with the key support member 3 so that the high-pitched sound side and the low-pitched sound side. The height of the spring support portion is changed between the side and the side.

15 and 16 show a fifth embodiment of the present invention. In this embodiment, a leaf spring type key return spring 10 is used.
Instead of the above-described embodiments using the above, a large number of springs (spiral springs) 30 separate from the key support member 3 are used to obtain the key recovery force for the key 1. Here, a spring 30 with the same spring constant is used for all keys 1,
A spring support member 31 made of outsert resin is fixed to the key support member 3 as a key scaling means. The common support member 31 has a spring support surface 33 on which each spring 3 is attached.
A large number of protrusions 32 for fitting 0 are formed,
The height of the spring support surface 33 is the same as in the previous embodiment.
It is tapered so that it becomes gradually higher toward the low-pitched sound side (closer to the key 1). As a result, on the low-pitched sound side, the spring 30 is largely compressed by the shorter distance from the key 1, and the initial set load can be increased and the elastic repulsion force can be increased accordingly. Even in the common support member 31, the white key 1 and the black key (not shown) adjacent to the white key 1 have springs corresponding to the black key in order to achieve almost the same touch feeling at their tip portions. Three
Set the position of the protrusion 32a that locks 0 to the white key spring 3
0 is shifted to the key swing fulcrum side from the position of the protrusion 32b that locks 0, so that the so-called spring locking position is staggered so that the repulsive force from the spring 30 changes. In addition, FIG. 17 is a modification of the fifth embodiment, in which the spring supporting member 31 is not provided, the spring supporting concave portion 34 is formed in the key supporting member 3, and the narrowing depth D thereof is changed between the keys, so that each spring can be formed. The repulsive force from 30 is key-scaled.

As another method of key-scaling the touch feeling of the white key and the black key, the springs of the protrusions 32a and 32b are used while using the same black / white key spring 30 in a straight position without staggering the spring arrangement. The locking position of the white key is set higher than that of the black key (that is, the protrusion 3 of the white key).
By making the height of the spring receiving base portion of 2b higher than the height of the spring receiving base portion of the black key protrusion 32a),
The white key pretension may be made stronger than the black key pretension.

A sixth embodiment is shown in FIGS. 18 and 19.
In this embodiment as well as in the fifth embodiment, the key recovery force is key-scaled by a large number of the same springs. Here, as the key scaling means, the rear edge portion 16 of the key support member 3 is tapered as shown in the drawing, and one end of the tension spring 35 corresponding to each key 1 is locked to this tapered portion. As a result, the tension spring 35 is greatly expanded toward the low-pitched side key, and the restoring force is applied to the key 1 in a state where the tension force is gradually increased. As a result, in the low-pitched key 1, the biasing force in the key-recovery direction is increased to that extent, and thus key scaling with a touch feeling is possible.

[0062]

As described above, according to the invention of claim 1, the key touch feeling key scaling means is integrally formed with the key support member, and the touch feeling of each key is low in the whole keyboard with a simple structure. The key scaling is performed so that the key pressing force becomes lighter (including stepwise) from the side toward the treble side, and it is possible to obtain a key touch feeling similar to that of an acoustic piano and improve productivity. Planned.

According to the second aspect of the invention, a key return spring assembly for sharing a large number of keys is provided, one end of which is engaged with the engaging portion of each key and the other end is engaged with the engaging portion of the key scaling means. It is stopped and gives each key a habit of returning. Further, the base portion of the key scaling means is supported by a spring supporting member that is common to a large number of keys. As a result, a key touch feeling similar to that of an acoustic piano is obtained, and production efficiency is improved. Further, since the frame (key support member) and the key return spring are separately provided for key scaling, the degree of freedom in design is increased. The invention according to claim 2 not only achieves the main object of touch-and-touch key scaling similar to that of an acoustic piano, but also has very little spring noise due to rattling of the spring even after long-term use, and is assembled. A keyboard device with good workability can be obtained.

According to the third, fourth and fifth aspects of the present invention, the touch feeling key scaling action is performed by changing the width of the leaf spring, the angle formed by the plane of the key supporting member, or the length. As a result, a keyboard device having a touch-and-touch key scaling function that is simple and has high productivity can be obtained.

According to the sixth aspect of the present invention, the touch feel key scaling action is performed by changing the spring cross-sectional area of the leaf spring. As a result, the same function and effect as those of the above-described embodiment can be achieved, and a keyboard device having a key scaling function with excellent productivity can be obtained without increasing a special additional step of adding a key scaling function such as keys and frames.

According to the invention of claim 7, the touch feel key scaling means is formed by the resin outsert molding method. This further improves productivity.

According to the eighth aspect of the present invention, the key scaling means is formed by changing the pre-tension of the white keys and the black keys by, for example, staggering the springs or changing the height of the spring receivers. As a result, all keys have the same spring material (including the white key and the black key) to perform the key scaling action, and the adjacent white and black keys can obtain substantially the same reaction force with the same touch force. . As a result, a keyboard device having a key scaling function that is simple and has high productivity can be obtained.

According to the ninth aspect of the present invention, the related members of the key (the key scaling means, the key return spring, and the spring support portion on the frame side) can be integrally incorporated by outsert. It is possible to obtain a keyboard device having a high degree of design freedom and high productivity while achieving the key scaling effect of the key touch feeling, which is the main purpose of.

According to the tenth aspect of the invention, the key scaling action is achieved by changing the height of the spring support portion on the fixed member side. As a result, it is possible to obtain a keyboard device which achieves the key scaling effect of the key touch feeling described above, which is the main purpose, and which has good workability. In addition, it is possible to obtain a structure that does not cause the spring to fall off or mechanical noise.

According to the eleventh and twelfth aspects of the present invention, the key scaling means is integrally formed on the key supporting member by resin outsert or press working. Also by this, the same effect as the embodiment of claim 10 can be obtained.

The end portion of the tension spring is supported by the oblique portion of the rear end portion of the key support member to perform the key scaling action. As a result, a keyboard device having a key touch feeling key scaling function which is simple and has high productivity can be obtained as in the case of the eighth embodiment.

[Brief description of drawings]

FIG. 1 is a perspective view of a key support member of a keyboard device for an electronic musical instrument according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the keyboard device of FIG. 1 in a key longitudinal direction.

FIG. 3 is a sectional view in a key longitudinal direction of a modified example of the first embodiment.

FIG. 4 is a top view of the keyboard device of the embodiment of FIG.

FIG. 5 is a cross-sectional view of a key support member, which is a modification of the first embodiment of the present invention, in which the bending angle of the key return spring is changed according to the type of the key.

FIG. 6 is an external perspective view of a keyboard device as a second embodiment of the present invention.

FIG. 7 is a sectional view of a key return spring fixing portion shown in FIG.

8 is a plan view of the key support member shown in FIG. 7. FIG.

FIG. 9 is a view showing a modification of the second embodiment of the present invention and showing another form of the key return spring, (A) is a top view,
(B) is a side view.

FIG. 10 is an explanatory diagram of still another modification of the second embodiment of the present invention.

FIG. 11 is a sectional view of a high-pitched keyboard of a keyboard device according to a third embodiment of the present invention.

FIG. 12 is a cross-sectional view of a bass side keyboard of the third embodiment.

FIG. 13 is a cross-sectional view of a treble-side support part in which the height of the support part of the key return spring is changed by an integrally molded spring support member, which is a modification of the third embodiment.

FIG. 14 is a cross-sectional view of a bass support portion of the modification example shown in FIG.

FIG. 15 is a sectional view of a keyboard device according to a fourth embodiment of the present invention.

FIG. 16 is a partial external perspective view of the key support member of the fifth embodiment.

FIG. 17 is a partial cross-sectional view of a key support member, which is a modification of the fifth embodiment and in which the height of the support portion of the spring is changed by drawing the key support member. FIG.

FIG. 18 is a sectional view of a keyboard device according to a sixth embodiment of the present invention.

FIG. 19 is a plan view of a key support member according to a sixth embodiment.

FIG. 20 is a cross-sectional view of a key return spring fixing portion of a keyboard device according to another embodiment of the present invention.

FIG. 21 is a perspective view of a main part of the embodiment of FIG.

FIG. 22 is an external perspective view of the key support member of the embodiment in which the base height of the key return spring is changed.

FIG. 23 is a cross-sectional view showing an integrally molded key return spring with a modified base height, as a modification of the embodiment of FIG. 22.

[Explanation of symbols]

1: White key, 2: Black key, 3: Key support member, 1
0: Key return spring, 23: Synthetic resin block, 2
8: Spring locking part, 29: Spring support member, 30:
Spring (key return spring), 35: Tension spring (key return spring)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junichi Mishima 10-1 Nakazawa-machi, Hamamatsu-shi, Shizuoka Prefecture Yamaha Stock Company

Claims (13)

[Claims] 1. A key support member, a large number of keys that are displaced with respect to the key support member by a key release operation, a key touch feel key scaling means integrally formed with the key support member, and one end of the key support member. The locking portion is provided with a key return spring that locks the other end to the key scaling means and returns the key to the initial position when the key is not pressed, so that the touch feeling of each key is key-scaled as a whole keyboard. A keyboard device for an electronic musical instrument characterized by the above. 2. A key support member, a large number of keys that are displaced with respect to the key support member by a key pressing operation, a key touch feel key scaling means fixed to the key support member by a fixing means, and one end. To the locking portion of each key, the other end is locked to each locking portion of the key scaling means, a key return spring assembly for sharing a plurality of keys to give each key a return habit, the key scaling means, A keyboard device for an electronic musical instrument, comprising a spring supporting member having a base part common to a plurality of keys. 3. The keyboard device for an electronic musical instrument according to claim 1, wherein the key scaling means is configured to change a width of the leaf spring. 4. The keyboard device for an electronic musical instrument according to claim 1, wherein the key scaling means is configured to change an angle formed by the flat surface of the key support member and the leaf spring. 5. The keyboard device for an electronic musical instrument according to claim 1, wherein the key scaling means is configured to change a length of a spring. 6. The keyboard device for an electronic musical instrument according to claim 1, wherein the key scaling means is configured to change a cross-sectional area of a plane perpendicular to a longitudinal direction of the spring. 7. The keyboard device for an electronic musical instrument according to claim 2, wherein the key scaling means is formed of resin outsert. 8. The key scaling means is formed so that the reaction force of the white key is large so that the reaction force of the black and white keys approaching at the tip of the key is the same as that of the white key and the black key. The keyboard device for an electronic musical instrument according to claim 1. 9. The keyboard for an electronic musical instrument according to claim 2, wherein the key scaling means and the spring assembly are integral with each other, and are fixed to a key support member by resin outsert. apparatus. 10. The electronic musical instrument according to claim 1, wherein the key scaling means is configured to change a height of a spring support portion provided on a fixed side of a key support member or the like. Keyboard device. 11. The electronic device according to claim 10, wherein the key scaling means is a spring bearing height change setting means, and is integrally formed on the key support member by resin outsert. Keyboard device for musical instruments. 12. The key scaling means is a spring receiving height change setting means, and is integrally formed on the relevant portion of the key support member by press working. Keyboard device for electronic musical instruments. 13. The key scaling means according to claim 1, wherein one end of the tension spring is supported on the key side and the other end is supported on a portion of the key support member having a rear end portion formed obliquely. Keyboard device for electronic musical instruments.