JP5439645B1 - Means for applying reaction force to keys - Google Patents

Abstract

An object of the present invention is to provide a keyboard portion of an electric sound-generating keyboard instrument which is anxious to play a harpsichord.
A guided body provided at the tip of a handle that is pivotally supported in the longitudinal direction of the key on the player's back side of the key using a key having the same dimensions and the same material as the harpsichord, A reaction force applying means to the key, comprising: an adjusting means for adjusting a reaction force to the key provided at a position of the bottom plate on which the key is placed facing the guided body. The adjusting means for adjusting the reaction force is composed of a plate spring and a guide column provided with a guide groove for guiding the guided body, and the plate spring bulges toward the guide column side. Means for applying a reaction force to the key. [Selection] Figure 1

Description

The present invention relates to a keyboard portion of a keyboard instrument of an electric sound generation method.

The sound is generated after an electrical part such as an electronic circuit related to sound generation is further added to the electric sound generation type keyboard to which the present invention is added.

All references to harpsichord in this specification may be spinets or virgins.

Both Non-Patent Document 1 and Non-Patent Document 2 described in the present specification 0007 column relate to an electric sounding type keyboard instrument named C-30.
In Non-Patent Document 1 described in the column 0007 of this specification, the play of the key of the harpsichord is reproduced in the C-30, and in Non-Patent Document 2, the key weight is reproduced in the C-30. doing.

Key weight is a term relating to the fact that one or more strings in a key are repelled by one or more spectrums.
Confusingly, if it is heavy, it is the weight of the guided body itself.

The key play and key weight referred to in Non-Patent Technical Document 1 and Non-Patent Technical Document 2 described in the present specification 0007 are determinants that are interested in playing a harpsichord.
In other words, the keyboard portion of an electric pronunciation-type keyboard instrument that does not reproduce both the key play and key weight of a real harpsichord at the same time does not feel like playing a harpsichord.
Both keyboard play and key weight referred to in Non-Patent Technical Document 1 and Non-Patent Technical Document 2 described in the present specification 0007 are obtained by using an electric sounding keyboard instrument named C-30. It is stated that two screens on the Internet are realized, that is, Non-Patent Document 1 and Non-Patent Document 2.
Therefore, it can be understood that the keyboard portion of the conventional electric sounding type keyboard instrument prior to the conventional product called C-30 did not feel like playing a harpsichord.

C-30 :: Product :: Roland ("Details" tab) http: // www. roll. co. jp / products / jp / C-30 / C-30 :: Q & A :: Support :: Roland http: // www. roll. co. jp / support / article / index. cfm? q = faq & p = C-30 & id = 18331207

If you own a harpsichord, you tune frequently. In addition, there are always occasions when you need to change the plectorum and strings, though less frequently.
If you don't want frequent tunings, plectorum exchanges, and string exchanges, but you want to play with a harpsichord, you don't need frequent tunings, plecrum exchanges, or string exchanges A keyboard instrument of the type that is interested in playing a harpsichord and that produces a harpsichord sound, and preferably has a historically realistic appearance if possible.
However, the conventional electric product produces a real sound only, but no means for applying a reaction force to the key has been obtained.
The appearance is also poor.

With the conventional product called C-30 described in Non-Patent Documents 1 and 2, the approach to feel like playing a harpsichord has been slightly improved.

The conventional product C-30 does not reproduce the reaction force received by the finger from the keyboard of the harpsichord when the key returns from the lowest position on the player side to the initial horizontal position. .

In addition, in the C-30 short key, it is not surprising that the play of the key is smaller than that of a real harpsichord.

Furthermore, in the C-30, when the key stays at the lowest position of the key, the reaction force of the harpsichord to the key is too large compared to the real harpsichord, so even when it is desired to stay longer at the lowest position of the key, Since it seems to be always urged to return to the initial position as soon as possible, it tends to be rounded up quickly against the intention.

As an impression by the user of the conventional product called C-30 described in Non-Patent Documents 1 and 2, "... In an actual musical instrument, the time to return after playing the keyboard can be adjusted. Then, it was a little too strong for the keyboard to return to its original position ... "http: // lalaroulou. blog. so-net. ne. jp / 2008-05-21.
The impression of the user of the conventional product called C-30 is consistent with what is described in the 0012 column of this specification.

Therefore, there is still room for the reaction force applied to the key to approach the correct one.

The present invention has been made to solve the above problems, and the means for applying a reaction force to the key according to claim 1 uses a key of the same size and the same material as the harpsichord, and the key is attached to the back side of the player. To a guided body provided at the tip of a handle pivotally supported in the longitudinal direction of the key and the key provided at a position of the bottom plate on which the key is placed facing the guided body A reaction force applying means to the key comprising an adjusting means for adjusting the reaction force of the key, wherein the reaction force applying means to the key is provided with a leaf spring and a guide groove for guiding the guided body. And the leaf spring bulges toward the guide pillar side.
The means for applying a reaction force to the key according to claim 2 comprises: a guided body provided at a tip of a handle pivotally supported on the back side of the player side of the key so as to be swingable in the longitudinal direction of the key; A reaction force applying means to the key, the adjusting means comprising: an adjusting means for adjusting a reaction force to the key provided at a position of the bottom plate facing the guided body. The adjusting means for adjusting the reaction force is composed of two leaf springs, and at least one leaf spring is provided with a guide elongated hole for guiding the guided body, and the two leaf springs are provided. Is characterized by bulging in a direction facing each other.
The reaction force applying means to the key according to claim 3, wherein the leaf spring is provided with a guide long hole for guiding the guided body. It is a reaction force giving means to the key.
4. The reaction force imparting means to the key according to claim 4, wherein the guided body is detachable from the handle. It is a force giving means.

The conventional product called C-30 described in Non-Patent Documents 1 and 2 had a certain effect, but by adopting the above configuration, a means for applying a reaction force to the key was obtained.

In addition, according to the present invention, a harpsichord is played thanks to an electric sounding-type keyboard instrument that does not require frequent tuning and exchange of plectrums and strings, and that is provided with means for applying a reaction force to the keys. If an electrical part such as an electronic circuit related to sound generation is added, it is possible to provide a sound that produces a harpsichord sound.

Moreover, if the keyboard to which the present invention is added is incorporated in the harpsichord as it is, not only the spectrum, the appearance is also a genuine harpsichord.
In fact, it is not necessary to modify the real harpsichord itself, so use a faithful copy of the real harpsichord.

In the figure which shows the Example of this invention, the uppermost figure shows a long key, the middle figure shows a short key, and the lowermost figure shows an AB partial enlarged view. The perspective view which shows how to attach the metal fitting for rocking | fluctuation of this invention, and the figure which shows the shape of a to-be-guided body. The figure which shows the adjustment means for adjusting the reaction force to the key of the Example of this invention. The upper drawing shows another embodiment of the leaf spring of the present invention, and the lower drawing shows an enlarged HV partial view. The figure which shows the combination of the guide pillar and leaf | plate spring of a present Example.

The present invention begins by using the real harpsichord keyboard as it is.
Therefore, the dimensions of the keyboard and the feel of the keyboard surface are the same as those of a real harpsichord.
The authenticity of the keyboard dimensions and the feel of the keyboard surface is the starting point for this task.

The dimension L1 found in the top diagram of FIG. 1 is a constant for the reason described in the 0020 column of this specification.

FIG. 1 is a diagram showing an embodiment for carrying out the present invention. The uppermost diagram shows a view of a long key 9 viewed from the side, and the middle diagram shows a view of the short key 9 viewed from the side. .
The difference between the case of the long key 9 and the case of the short key 9 is that the position where the balance pin 11a is driven into the balance table 11 and the shape of the back surface of the key 9 in the range from the balance pin 11a to the cut on the player side. Is a point. Therefore, reference numerals other than the cow bone 9b are omitted in the middle diagram of FIG.

In short, in the space between the bottom surface of the key 9 and the bottom plate 10 in the range where the ebony 9a and the cow bone 9b are pasted, a means for solving this problem is provided in such a manner that it cannot be seen from the outside. It is.
Therefore, the appearance of the finished product after incorporating the keyboard portion equipped with the present invention into the reproduction of the genuine harpsichord with only the plectorum removed is the same as the appearance of the harpsichord.

For the implementation of the present invention, the reaction force applying means 1 to the key 9 that is spatially sandwiched between the long key 91 and the bottom plate 10 or both, or the pair of the short key 91 and the bottom plate 10 and both. Even if it is called one unit of this invention even if it is the reaction force provision means 1 to the key pinched spatially, there will be no problem. A desired keyboard portion can be obtained by arranging the units as many as desired by the practitioner.
The solving means of the present invention is provided at the dimension L3 found in the uppermost drawing of FIG. 1 when both the long key 9 and the short key 9 are measured from the cut end of the key 9. Although a mode for carrying out the invention in the case of the key 9 will be described, the implementation of the present invention to the short key 9 conforms to the case of the long key 9.
With regard to the short key 9, the solution means of the present invention is provided so as not to protrude from the left and right adjacent keys 9 in the form for carrying out the present invention. What is necessary is just to cut out a part of the back surface of the long key 9 of the place where 9 will not operate | move well.

As shown in the whole of FIG. 1 and the upper diagram of FIG. 2, the reaction force imparting means 1 to the key allows the handle 3 to swing in a recess provided on the lower surface of the key 9 on the player side. When the position at which the shaft 4 is screwed to the key 9 by the swing metal fitting 5, that is, the dimension L3 is determined, the positions of the remaining parts are automatically determined.
The position at which the base end of the handle 3 is attached to the key 9 is measured from the cut end of the key 9 for both the long key 9 and the short key 9 and is called dimension L3.
The dimension L3 is determined at the discretion of the practitioner because there is a degree of freedom on the center line of the key 9 and in the region where ebony and cow bones are pasted.

The swing metal fitting 5 is provided with a base end of a handle 3 that swings in the longitudinal direction of the key 9 as shown in FIG. 1, and a guided body 2 is provided at the tip of the handle 3. The plate spring 6a of the adjusting means 6 for adjusting the reaction force to the key, which is formed so that the guided body 2 is provided on the bottom plate 10 below the guided body 2 so as to face the guided body 2, and the other It is the structure hold | maintained so that it may be pinched | interposed into the leaf | plate spring 6a (or guide pillar 6c).

The plate spring 6a has a shape in which the distance measured horizontally with the other plate spring 6a (or the guide post 6c) becomes narrower as it goes downward, and further, the guided body 2 is in an open state below the plate spring 6a. .
In the case where the adjusting means 6 for adjusting the reaction force to the key is two leaf springs 6a such as the combination 1 and the combination 2 in FIG. 5, the leaf springs spread in a trumpet shape on the upper side and the lower side. The central portion in the height direction of 6a is set to have a slightly narrower width than the equator diameter of the guided body 2 where the guided body 2 has the smallest equator diameter.

The leftmost guided body 2 in the lower diagram of FIG. 2 is the case of the smallest equator diameter, and is dedicated for use when the weight of the smallest key 9 is used.
In the case of the two leaf springs 6a described in the present specification, the width of the central portion in the height direction of the leaf spring 6a is a width corresponding to the dimension X1 in the lower diagram of FIG.
The space sandwiched between the two leaf springs 6a becomes a passage 7 through which the guided body 2 passes.

In the stationary state when the key 9 is not operated and is unattended, the guided body 2 is sandwiched between the leaf spring 6a and the other leaf spring 6a (or the guide post 6c) in a light contact state. Position.

In the lower drawing of FIG. 2, the drawing of the recess formed in the lower surface of the key 9 is omitted.
FIG. 2 shows a state in which two swing metal fittings 5 screwed to the concave portion are fixedly provided with their portions in point contact with the handle 3 facing each other.
In the lower part of FIG. 2, the shaft 4, the handle 3, and the guided body 2, which are integrated, oscillate in a plane that passes through the handle 3 and is perpendicular to the paper surface of FIG. 2.
In the upper part of FIG. 2, unlike the state after the actual mounting, the shaft 4, the handle 3, and the non-guide body 2 are integrated as the lower part of FIG. However, the shaft 4 is actually inserted into a bulge formed between the swing metal fitting 5 and the key 9 and screwed to the key 9 in the real mode. Since the screw is not a main part, it is omitted in all of FIG.
In other words, the two swing metal fittings 5 are attached so as to freely swing the base end of the handle 3 in the longitudinal direction of the performer, that is, in the longitudinal direction of the key.

The leaf spring 6a depicted in FIG. 3 has a shape when the leaf spring installation base 6b is used.
When the leaf spring installation base 6b is not sandwiched between the leaf spring 6a and the bottom plate 10, the positional relationship from the bottom plate 10 changes, so the shape of the leaf spring 6a is not the same as the shape of FIG.
Compared to the case where the leaf spring 6a directly screwed to the bottom plate 10 is replaced many times for the reason described in the following description of the present specification, the leaf spring installation base 6b has a leaf spring 6a and a bottom plate. If it is between 10, it is guaranteed that the leaf spring 6a is completely fixed over a long period of time.
The leaf spring installation base 6b is a cuboid metal lump having screw holes.

The guide column 6c is screwed to the bottom plate 10.
In the A-B partial enlarged view at the bottom of FIG. 1, all the thick lines excluding the leaf springs represent screws.
Since the leaf spring 6a is a thin plate, it is drawn with a thick line.

The guided member receiving member 8 is a felt in the embodiment. In the lower part of FIG. 2, in the hatched portion of the guided body 2, the south plateau that collides with the bottom plate 10 and the portion near the south pole are located on the bottom plate 10. Take it above. Although the guided body receiving member 8 is drawn in a quadrangle in FIG. 3, it is not limited to a quadrangle.
In the lower part of FIG. 2, the guided body 2 is a rotating body having the handle 3 as a rotation axis, and the guided body 2 having the smallest equator diameter to the guided body 2 having the largest equator diameter are n in total. There are types. In the guided body 2, the curvature radii of the hatched portions corresponding to the n types are all the same.
Also, the height and weight of the guided body 2 are all the same. In the lower diagram of FIG. 2, the thin line portion in the boundary line of the outer shape of the guided body 2 indicates an arbitrary curved surface. To be identical.
The hatched portion that is not a portion near the South Pole is a portion that is touched when passing through the passage 7 of the adjusting means 6 for adjusting the reaction force to the key.
In the lower diagram of FIG. 2, the guided body 2 described in the column 0043 of this specification to be described later can be attached to and detached from the handle 3, except for the leftmost guided body 2. The guide body 2 is drawn alone.

The anti-shake pin 12 is for keeping the center line of the key 9 in the same vertical plane.
The cross section of the anti-shake pin 12 is a perfect circle. The hole of the key 9 through which the anti-shake pin 12 passes is a long hole whose width of the key 9 is the diameter of the anti-shake pin 12.

The cross section of the balance pin 11a is also a perfect circle. The balance pin 11a is erected on the balance table 11, and a key 9 through which the balance pin 11a penetrates has a hole that is widened and has a diameter of the balance pin 11a.
The upper surface of the balance table 11 allows the player to perform a smooth balance movement when the player pushes down the place where the ebony 9a and the cow bone 9b of the key 9 in the uppermost figure and the middle figure of FIG. It has a shape like this. More specifically, between the key 9 and the balance table 11, there is a circular felt cloth that is penetrated by the balance pin 11a.
When combined with the description in the 0034 column of this specification, it can be seen that the key 9 can be easily separated as a single key 9 by pulling it upward.

If there is no leveling retaining member 13 due to the weight of the key 9 itself behind the balance pin 11a, the key 9 rests in an inclined state where it is attached to the bottom plate 10 at the portion of the anti-shake pin 12. By having the horizontal maintenance receiving member 13, both the long key 9 and the short key 9 can remain in the horizontal position in the unattended state.
When the edge of the player side of the key 9 reaches the lowest position, the cut of the key 9 on the back side tries to return to the bottom plate 10 by the weight of the key 9 on the back side from the balance pin 11a, and the key 9 The horizontal maintenance receiving member 13 softly receives the horizontal position.

At the end of the pressing process of the key 9, when the edge of the player side of the key 9 reaches the lowest position in the possible displacement range, the back side of the key 9 is softly stopped by the felt portion 14 a of the lift stopper 14. .
Seven of the rise-stop fixing screws 14b are cut out so that a part of the edge of the key 9 arranged adjacent to each other at seven places is larger than the cross-section of the rise-stop fixing screw 14b at the penetrating portion and becomes a large penetrating circle as a whole. The rise stopper 14 is fixed to the bottom plate 10. Therefore, the ascending and fixing screw 14b standing on the bottom plate 10 does not hinder the balance movement of the key 9.
When the key 9 on the back side of the balance pin 11a reaches a peak at the felt portion 14a of the ascending stop 14, the player-side key 9 is at the lowest position within the possible displacement range.
Therefore, when the key 9 on the back side of the balance pin 11a reaches a peak at the felt part 14a of the ascending stop 14, the guided body 2 is just leveled at the guided body receiving member 8 on the bottom plate 10. The size of the guided body 2 and the length of the handle 3 must be selected by the practitioner.

The dimension L2 and the dimension L3 found in the upper drawing of FIG. 1 are determined so that the guided body 2 just reaches a peak at the impact relaxation member 8 on the bottom plate 10. The dimension L3 is determined before the dimension L2. When the dimension L3 is determined, the dimension L2 is always determined after trial and error, with the case where the key 9 is in the lowest position as a boundary condition.
The dimension L2 also has a boundary condition that the screw that holds the swinging metal fitting 5 must not penetrate through ebony or cow bone.
Thereafter, when the length of the handle 3 is determined, the height of the guided body 2 is automatically determined.
Of the guided bodies 2 whose heights are determined, the one having the smallest equatorial diameter is used, and the shape of the leaf springs 6a and the leaf springs 6a are spaced apart from each other. It is always decided after adjustment through trial and error.

A dimension L4 found in the upper diagram of FIG. 2 is a dimension in the width direction of the key 9 of the recess provided on the lower surface of the key 9, and is a size of the swinging metal fitting 5 and the leaf spring 6a employed by the practitioner of the present invention. Depends on the.
Dimension L4 and dimension L5 in the upper diagram of FIG. 2 are for a long key.
In the case of a short key, the dimension L5 may be zero.
The dimension L5 is a dimension obtained by subtracting the remainder obtained by subtracting the recess dimension L4 of the key 9 in the width direction from the width dimension of the key 9 of the key 9.
In the long key 9, the dimension L6 cannot obviously be zero. This is because it detracts from aesthetics.

The description in the column 0020 of this specification is based on the premise that the keyboard part is inserted into a luxurious container, but the container, which is also called an exoskeleton that determines the appearance of the harpsichord, does not occupy a place and is portable. If you want to fit into a newly created container that is different from the historically actual exoskeleton, the main purpose of which is to use it, you will stubbornly keep the dimension L1 found in the upper diagram of FIG. There is no reason, as long as the net vertical displacement of the key 9 can be kept the same, the guided body 2 can be made larger, the handle 3 can be made longer, the leaf spring 6a can be made larger, and the dimension L1 can be made larger. In some cases, a recess on the back surface of the key 9 can be omitted.
Since the net vertical displacement amount of the key 9 is not changed, the user still feels like playing a harpsichord. However, the instrument only increases in thickness downward.
In the preferred embodiment, as few changes as possible are added to the genuine harpsichord as much as possible. However, if there is no hesitation to cut out the back surface of the key 9, there is an option of using a slightly larger part and cutting the back surface of the adjacent key 9 so as not to interfere with the judgment of the practitioner.

The number of leaf springs 6a shown in FIG. 3 is the same, and the number of spring constants is different from the smallest spring constant to the largest spring constant.
The leaf spring 6a having the smallest spring constant is exclusively used for the weight of the smallest key 9.
The leaf spring 6a having the largest spring constant is dedicated to the use of the largest key 9 weight.
Since only the weight of the key 9 that can actually be a harpsichord is a faithful reproduction target, when the guided object 2 having the maximum equator diameter is determined, the upper limit of m is automatically determined.

The leaf spring 6a of the present invention may be changed to the leaf spring 6a in the form of the HV partial enlarged view in the lower part of FIG.
4 is a view in which two identical leaf springs 6a face each other as seen from the same direction as the A-B partial enlarged view of FIG. 1, and the bottom plate 10 and the guided member receiving member 8 are drawn. Is omitted.
The shape of the leaf spring 6a is a shape formed by extending the outer diameter contour of the upper diagram of FIG. 4 in the key width direction by a distance slightly smaller than the width of the short key 9.
The lower part of FIG. 4 is a partially enlarged view of HV, and the width in the horizontal direction of the narrowest part of the passage 7 through which the guided body 2 passes is the dimension X1. The dimension of the part that is felt as a protrusion when passing through the guide body 2 and the part that plays a role of emphasizing when the maximum reaction force is applied to the key when passing through is the dimension X2 that is always smaller than the dimension X1.
In the lower HV partial enlarged view of FIG. 4, two different leaf springs are joined to form one leaf spring 6 a, and the tip of the arrow of the dimension X 2 of the leaf spring 6 a that contacts the guided body 2. This part is an additive to the leaf spring 6a described in the 0041 column of this specification.
The decisive difference between the two leaf springs 6a in the trumpet shape described in the present specification 0027 is that in the enlarged HV partial view in the lower part of FIG. For 2, there is something that can be felt as a spine only when passing through the passage 7 from top to bottom.
As described in the column 0055 of this specification to be described later, it is possible to return to the horizontal position so that it can be felt as one section at a time in the return stroke.
For the guided body 2, the leaf spring 6 a found in the HV partial enlarged view in the lower stage of FIG. 4 has a shape that does not feel a spine when passing through the passage 7 from the bottom to the top.
When viewed from the direction in which the thickness is understood (as viewed from the front of FIG. 4), the leaf spring is a single leaf spring in the vicinity of the portion like a spine and above the portion like the spine.
Two leaf springs are joined by an adhesive or welding to form one leaf spring 6a.

When the guided body 2 is detachable from the handle 3, a combination of m spring constants described in the 0041 column of this specification can be considered for each guided body 2.
In other words, when one guided body 2 having n types from the lower limit to the upper limit with respect to the equator diameter and one guided body 2 having the smallest equator diameter at the lower limit are determined, there are m leaf springs 6a from the lower limit to the upper limit with respect to the spring constant. It is possible to adjust the weight of the key 9 in n × m stages.
It is at the discretion of the practitioner to determine how many n and how many m depending on the specific resolution of nxm.
Since the joining of the handle 3 and the guided body 2 is screwed, the exchange is easy.

Non-Patent Document 2 describes that the conventional product C-30 has no variation with respect to the weight of the key 9, that is, only one type.
In the conventional electric keyboard instrument, the weight of the key 9 is limited to a fixed value set at the time of manufacture, and there is no other choice in the first place. It was impossible to adjust the weight of the key 9 again.

As already shown in the 0043 column of this specification, when one guided body 2 having the smallest equator diameter is determined, there are n relationships between the narrow width of the passage 7 and the equator diameter of the guided body 2; Further, the weight of the key 9 can be adjusted in n × m stages by the spring constants of m springs of the same shape provided at the same position.
The larger n × m is, the more it can be regarded as substantially stepless. In the real harpsichord, the weight of the key 9 can be adjusted continuously, while the present invention is an artificial mechanism that is completely different from the method of flicking a string with a spine, but it is one step closer to the real harpsichord. I was able to.

When producing harpsichords, it is one of the productions that the keyboard part, which is formed by arranging the required number of keys 9 on the bottom plate 10, in the case that looks like the whole instrument, that is, the main body part excluding the keyboard part and legs, is one of the productions. As a process.
When it is necessary to adjust the reaction force to the key 9, the screwing between the keyboard part and the case is released, the whole is pulled out, and the key 9 is moved upward from the balance pin 11a or the like for each unit of the present invention. The adjusting means 6 for pulling out and adjusting the reaction force to the key is replaced with the optimum combination of the guided body 2 and the leaf spring 6a described in the section 0043 of this specification.
And once again in the case that should also be called an exoskeleton, as in the case of production, the case and screwed.

For the first time to play the harpsichord, in order to better understand the feeling that “the key 9 falls to the bottom plate 10”, the weight of the smallest key 9 is set, that is, the most practical of one spectrum. It is necessary to set a value corresponding to a state where one string is repelled in a small area.
So, until now, the first person to play a harpsichord has to start playing with a real harpsichord.
This is because the weight of the smallest key 9 is not set in the conventional electric keyboard instrument.

Now, according to the present invention, the weight of the key 9 can be set in a stepless manner that can be felt discrete but substantially continuous, so if you are the first person to play a harpsichord and do not own the harpsichord, It is only necessary to set the weight of the smallest key 9 in the provided keyboard part.

If the keyboard part equipped with the present invention is incorporated in a small and simple case that does not stick to the luxurious appearance, it will be significantly cheaper.

FIG. 5 shows a possible combination of the adjusting means 6 for adjusting the reaction force to the key when the guided member receiving member 8 is outlooked.

As another embodiment, the guided body 2 provided at the tip of the handle 3 that is pivotably supported in the longitudinal direction of the key 9 on the player-side back surface of the key 9 and the key 9 are mounted. A reaction force applying means 1 to the key comprising an adjusting means 6 for adjusting a reaction force to the key provided at a position of the bottom plate 10 placed opposite to the guided body 2, The adjusting means 6 for adjusting the reaction force to the key includes a guide post 6c and a plate spring 6a provided with a guide long hole 6x for guiding the guided body 2. The plate spring 6a includes: It is good also as the reaction force provision means 1 to the key characterized by bulging towards the said guide pillar 6c side, and the said to-be-guided body 2 being detachable with respect to the said handle | pattern 3.

The leaf spring 6a of the present invention may be replaced with a coil spring.

Now, in the real harpsichord, the key 9 pressing process can be divided into an idle zone, a key 9 weight zone, and a vertical downward projection zone in order from the initial horizontal position.
The play section is a section corresponding to the period from the initial position of the unmanned key 9 until the real harpsichord spectrum contacts the string.
The interval of the weight of the key 9 is an interval corresponding to the moment from when the real harpsichord pletocram begins to repel the string until the moment when the string is played.
The vertical downward projection section is a section corresponding to the time from when the real harpsichord spectrum has played the string until the key 9 reaches the lowest position in the possible displacement range.
In the return stroke of the key 9, since it returns to the horizontal position from the balance pin 11a by the weight of the key 9 itself on the back side, it returns at once, so it is not considered divided into sections.
The guided body 2 passes through the section of weight of the key 9 after passing through the section of play, and at the moment when it passes through the section of weight of the key 9, it falls by vertical downward projection, and the guided body receiving member (felt on the bottom plate 10) ) The position of the key 9 when it stops when it collides with 8 is the lowest position of the key 9, which is the same as the lowest position in the case of a genuine harpsichord.
The moment when the real harpsichord spectrum bounces the string corresponds to the boundary between the weighted section of the key 9 and the vertical downward projection section in the keyboard portion of the electric harpsichord equipped with the present invention.

As if you were moving up and down with a small amplitude on the plywood that closed the pitfall and gradually increased the amplitude, if you think that it is similar to falling to the bottom of the pitfall as soon as it reaches a certain amplitude, Since it is understood that the fall does not start at the initial velocity of zero, it is called the vertical downward projection section.

After the guided body 2 reaches the bottom plate 10, if the finger is kept at the lowest position of the key 9, the key 9 is always attached to the lowest position.
If the finger is lifted by the player's own intention, both the genuine harpsichord and the present invention return to the horizontal position by the self weight of the key 9 from the balance pin 11a to the back side key 9 itself.
During the return stroke of the key 9, the guided body 2 is not subjected to any force other than the return force due to the weight of the key 9 itself from the balance pin 11 a of the key 9, and the player removes the finger pressing force from the key 9. After that, since the momentum of the guided body 2 is sufficiently larger than the capture force when passing through the narrowest part of the passage 7 while pushing the leaf spring 6a away, the section clearly divided into three in the pressing stroke Contrary to feeling that there is, there is only one section because it returns to the initial position at once in the return stroke.

The shape of the leaf spring 6a is the key in each section of “play section: weight section of the key 9: vertical downward projection section” until the guided body 2 reaches the bottom plate 10 from the initial position in the pressing stroke. The leaf spring 6a of the dimension X1 found in the lower figure of FIG. 5 is such that the connection ratio of the projections of the specific points of the edge of the player 9 on the vertical line is the same as that of the real harpsichord. Since there is always a distance from the bottom plate 10 in the middle, it is always determined after trial and error.

With respect to the reaction force applied to the key 9 described in columns 0053 to 0055 of the present specification, the present invention is applicable to all items unique to the genuine harpsichord.
Therefore, when the reaction force is transmitted to the key 9 by the configuration of the present invention, the user can feel that he is playing the harpsichord.

As described above, since the method for configuring the reaction force applying means 1 for the key has been given each time, it is in principle guaranteed that the practitioner can implement the present invention.

The present invention can be utilized in the musical instrument industry.

DESCRIPTION OF SYMBOLS 1 Reactive-force provision means 2 Key to-be-guided body 3 Handle 4 Shaft 5 Swing metal fitting 6 Adjusting means 6a for adjusting the reaction force to a key Leaf spring 6b Leaf spring installation base 6c Guide post 6x Guide hole 6y Guide groove 7 Passage 8 Guided body receiving member (felt)
9 Key 9a Either ebony or cow bone attached to the long key 9b Ebony or cow bone attached to the short key (one different from 9a)
9c Weight (lead)
10 Bottom plate 11 Balance stand 11a Balance pin 12 Anti-shake pin 13 Leveling retaining member (felt)
14 Lift stop 14a Felt 14b Lift stop fixing screw

Claims (4)

A guided body provided at the tip of a handle pivotally supported on the back side of the key player so as to swing in the longitudinal direction of the key, and the guided body of the bottom plate on which the key is placed. A reaction force applying means to the key comprising an adjusting means for adjusting a reaction force to the key provided at a position, the adjustment means for adjusting the reaction force to the key comprising a leaf spring and the A reaction force applying means to a key, comprising: a guide post provided with a guide groove for guiding a guided body, and the leaf spring bulging toward the guide post. A guided body provided at the tip of a handle pivotally supported on the back side of the key player so as to swing in the longitudinal direction of the key, and the guided body of the bottom plate on which the key is placed. A means for applying a reaction force to the key, the adjusting means for adjusting the reaction force against the key, the adjusting means for adjusting the reaction force against the key. A guide long hole for guiding the guided body is provided in at least one of the plate springs, and the two plate springs bulge toward each other. Means for applying reaction force to the key. The means for applying a reaction force to the key according to claim 1, wherein the leaf spring is provided with a long guide hole for guiding the guided body. The means for applying a reaction force to the key according to claim 1, wherein the guided body is detachable from the handle.

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