JP5119656B2 - Electronic musical instrument keyboard device - Google Patents

Description

  The present invention relates to a keyboard device for an electronic musical instrument, and more particularly, to a stopper member that regulates the rotation of a key and a mass body interlocked with the key.

Conventionally, in a keyboard apparatus of an electronic musical instrument, a key rotation operation range (from an initial position to a maximum rotation position) when a key is pressed is regulated by an upper limit stopper and a lower limit stopper.
FIG. 6 is a right side view for schematically explaining a keyboard device of a conventional electronic musical instrument.
In the figure, 1 is a white key body, and 2 is a black key body. Reference numeral 3 denotes a keyboard frame, which has a step at the front and rear portions in the longitudinal direction of the key, a horizontal portion 3a between them, and a key support portion 3b behind the horizontal portion 3a.

A key fulcrum 1b is provided at the rear end of the white key main body 1 and is attached to the key support 3b so that the white key main body 1 can be rotated.
The white key main body 1 has both side surfaces formed downward from the upper surface thereof, and the both side surfaces are further lowered downward to form a pair of left and right stopper pieces 1c at an intermediate position near the tip 1a. 1d is bent substantially perpendicular to the depth direction of the key.
The black key body 2 also has a key fulcrum 2b and a stopper piece 2c at the same position as the white key described above.
A plurality of parallel slits 3c are vertically formed in the front step portion of the keyboard frame 3, and the tip portions 1d and 2d of the stopper pieces of the white key and the black key are inserted into each slit 3c.

A key switch 4 is installed in the horizontal portion 3 a, and a protrusion (actuator) is provided on the back side of the upper surface of the white key main body 1 and the black key main body 2 so as to face the key switch 4.
The upper limit stopper 6 is disposed in a band shape along the key arrangement direction on the lower surface of the horizontal portion 3a so as to face the upper surface of the tip portion 1d of the stopper piece. On the other hand, a lower limit stopper 101 is arranged in a band shape on the upper surface of the horizontal portion 3b. The upper limit stopper 6 and the lower limit stopper 101 are common to all white keys and black keys.

As the upper limit stopper 6 and the lower limit stopper 101, those having an elastic restoring force are necessary from the viewpoint of shock absorption, sound deadening, and reproducibility of the rotation range. Conventionally, elasticity such as felt or polyurethane elastomer is used. A mold movement restricting member is used.
When the performer presses the key, the key switch 4 is elastically compressed and the switch is turned on. When the performer further presses the key, the lower limit stopper 5 is elastically deformed by receiving an impact from the left and right side surfaces of the pressed white key body 1 and black key body 2. At that time, the key is braked by converting kinetic energy into heat energy due to internal loss.
However, the lower limit stopper 101 generates an elastic restoring force when returning from the elastic deformation, and this elastic restoring force becomes a repulsive force (referred to as rebound) against the key. Is transmitted to the fingers of the performer and gives the player discomfort.

On the other hand, when the key is released, the pressed white key main body 1 and the black key main body 2 return to their original initial positions by a key return force due to the action of a return spring (not shown). At this time, the upper surface of the tip 1d of the stopper piece collides with the upper limit stopper 6.
At that time, the elastic restoring force of the upper limit stopper 6 becomes a repulsive force against the white key main body 1 and the black key main body 2. Since this repulsive force is in a direction opposite to the key returning force, the white key main body 1 and the black key main body 2 repeatedly vibrate until they completely stop, and the player's finger touches the key. This vibration is transmitted to the player and makes the player uncomfortable.

Further, as a conventional keyboard device for an electronic musical instrument, there is one that can obtain a key pressing feeling similar to an acoustic piano by rotating a mass body in conjunction with a key pressing operation.
The upper limit stopper and the lower limit stopper for the mass body described above also absorb and brake the impact of the inertia of the mass body, but when the mass body collides, a repulsive force is generated, which is played by the player's finger via the key. To give a sense of discomfort to the performer.

Therefore, in Patent Document 1, the “mass part MB” is provided in a form arranged in parallel with the upper limit stopper of the hammer. The “mass part MB” has a structure in which the mass body 22 is sandwiched between the upper cushion 21 and the lower cushion 23.
The mass body 22 is made of an elastic material in which metal powder is mixed with elastomer or rubber. Alternatively, it is described that sand or metal powder wrapped in a bag-like member and formed to a length extending over the entire key width or a plurality of key widths may be applied.
It is described that by using the above-mentioned “mass part MB”, a firm stop feeling can be maintained over a long period of time while suppressing the bounce of the hammer body, the impact on the finger, and the impact sound when the key is depressed. ing.

However, in this patent document 1, since it receives the impact of a hammer through the lower cushion 23 and is bonded and fixed to the chassis through the upper cushion 21, sand and metal powder are wrapped in a bag-like member. The function of the material cannot be fully demonstrated.
In addition, the durability of the bag-like member due to the stress received when the hammer 2 collides with the member wrapped with the bag-like sand or metal powder as described above and the original shape returnability after the collision have not been studied. It was.
JP 2003-195853 (FIGS. 4 to 6)

  The present invention has been made in order to solve the above-described problems, and the operation restriction characteristics are improved by improving the characteristics of the surrounding member in the action restriction member having a good key touch feeling in a structure in which a plurality of particles are accommodated. It is an object of the present invention to provide an improved keyboard device for an electronic keyboard instrument.

In the first aspect of the present invention, a plurality of rotating members arranged side by side, a frame that supports the plurality of rotating members, and the rotation range of the rotating members when the rotating members collide with each other. In the keyboard device of an electronic musical instrument having an operation restricting member that restricts the movement, at least one of the operation restricting members includes one or a plurality of built-in operation restricting members partially or entirely surrounded by an outer surrounding member, The built-in operation restricting member is accommodated in a closed region in which a plurality of particles are partially or entirely surrounded by an inner surrounding member, and the plurality of rotation members are arranged in the arrangement direction of the rotating members. all SANYO extending in the arrangement direction of the moving member, the particles size of the particle is less than 3mm.
Accordingly, the plurality of particles are surrounded by at least two surrounding members, that is, the outer surrounding member and the inner surrounding member. As a result, a plurality of particles are surrounded by a single surrounding member, but the degree of freedom in designing the surrounding member is increased, and composite characteristics that cannot be obtained by a single-layer surrounding member are obtained. Can be improved.

For example, the inner enclosure member and the outer enclosure member can be made thinner than a single enclosure member, or materials having different characteristics or conflicting characteristics can be selected.
Typically, it has a single outer enclosure member and a single inner enclosure member, but there may be a plurality of each. As an outer surrounding member, a part of one outer surrounding member may be surrounded by the other outer surrounding member. As the inner surrounding member, there is a case where the other inner surrounding member further surrounds the closed region inside the closed region surrounded by one inner surrounding member.
Typically, when the rotating member collides, the plurality of surrounding members are present on the action line where the impact force is distributed and transmitted to the surrounding member and the plurality of particles.
Outer enclosing member is provided with, for example, a mounting portion for sealing to the substrate, by the the outer-side surrounding member and the substrate, surrounding the internal movement limiting portion. In contrast, even the inner enclosing member, provided with a mounting portion for sealing to the substrate, or so as to surround the plurality of particles by the the inner side enclosing member and the substrate, the inner enclosing member, for example, The entire cross-section of the particle is surrounded by a cylindrical shape.

According to a second aspect of the present invention, in the keyboard device for an electronic musical instrument according to the first aspect, at least one of the built-in operation restriction members is formed by stacking the inner enclosure member of the built-in operation restriction member on the outer enclosure member. It has been done.
Therefore, the surrounding member is composed of a plurality of layers of an outer surrounding member and an inner surrounding member.
With a single surrounding member, when you want to increase the strength and impact durability of the surrounding member, simply increasing the thickness makes it less flexible and flexible, and the characteristics of a single material become conspicuous. .
If materials having different characteristics or contradicting characteristics are selected for the inner surrounding member and the outer surrounding member, a composite characteristic combining both characteristics can be obtained.
Further, even if the inner surrounding member and the outer surrounding member are the same material, and the thickness of the stack is equal to the thickness of a single surrounding member, the inner surrounding member and the outer surrounding member are independent members, If both are slidable and are in contact with each other so as to cause slippage, the strength and flexibility can be increased without lowering the strength.

According to a third aspect of the present invention, in the keyboard device for an electronic musical instrument according to the first aspect, at least one of the built-in operation restricting members includes a plurality of particles not accommodated in the built-in operation restricting member. der those partially or surround the entirety by outer enclosing member is, particles which are not accommodated in the internal movement limiting member is also the size of the particle is less than 3mm.
The built-in operation restricting member behaves as one large particle. Therefore, as a whole of the operation restricting member, composite characteristics based on the behavior of large particles and the behavior of other particles can be obtained. For example, if the inner surrounding member has an elastic restoring force, when the impact force is lost, it automatically contracts and easily returns to its original shape.

In the invention according to claim 4, in electronic musical instrument keyboard apparatus according to any one of claims 1 to 3, the inner side enclosing member of the internal movement limiting member, surrounded by the outer-side surrounding member The divided area is divided into a plurality of areas, and at least one of the particle groups accommodated in each of the divided areas has different operation restriction characteristics from the particle groups accommodated in the other divided areas. It is what you have.
For example, the behavior of particles changes depending on the material, shape, size, total number of particles, etc., and the operation regulation characteristics differ. Therefore, if particles having different characteristics or conflicting characteristics are selected for the particle groups accommodated in each divided region, composite characteristics combining the characteristics of each particle group can be obtained.

According to a fifth aspect of the present invention, in the keyboard device for an electronic musical instrument according to any one of the first to fourth aspects, the one or more built-in operation regulating members are an arrangement of the plurality of rotating members. It is divided in the direction and arranged side by side.
Therefore, since the particle movement range is limited to the range of each built-in operation regulating member, the particle distribution does not deviate in the arrangement direction of the rotating members.

The keyboard device for an electronic musical instrument according to any one of claims 1 to 5, wherein the plurality of rotating members are at least a key and a mass body that rotates in conjunction with a key pressing operation of the key. On the other hand.
There are keyboard devices with or without a mass body that rotates in conjunction with a key press operation. The movement restricting member in which a plurality of particles are surrounded by the surrounding member may be used for restricting the rotation range of either the key or the mass body, or may be used for restricting both the rotation ranges. At this time, since the key and the mass body are arranged in different regions, the operation restricting member for the key and the operation restricting member for the mass body are different members.
Further, as the restriction of the rotation range, there are the upper limit position restriction and the lower limit position restriction. An operation restricting member in which a plurality of particles are accommodated in the closed region by the surrounding member may be used for any restriction or may be used for both. The operation restricting member for the upper limit position restriction and the operation restricting member for the lower limit position restriction are different members.

According to the present invention, since the repulsive force is not generated when the rotating member collides with the operation restricting member, there is an effect that the touch feeling of the key is improved.
There is an effect of improving the durability and flexibility of the surrounding member of the operation regulating member.

FIG. 1 is an explanatory view schematically showing a first embodiment of the present invention.
1A is a right side view schematically illustrating a keyboard device of an electronic musical instrument, and FIGS. 1B and 1C are schematic views in which the lower limit stopper 5 is cut in the longitudinal direction of the key. FIG. 1D is a cross-sectional view schematically shown by cutting in the key arrangement direction.
In the figure, the description thereof is omitted the same reference numerals are given to the same parts as in FIG. 6.
In FIG. 1 (a), the lower limit stopper 5 relates to a plurality of white key main body portions 1 (rotating members) and a plurality of black key main body portions 2 (rotating members) arranged side by side. ) Is a long motion restricting member that extends to).
On the other hand, the upper limit stopper 6 is an operation restricting member using a conventional felt or the like.

The structure of the lower limit stopper 5 will be described with reference to FIG.
The lower limit stopper 5 uses the horizontal portion 3a as a base material, and the built-in operation restricting member 12 is entirely surrounded by the outer surrounding member 13 and the horizontal portion 3a, and extends in the key arrangement direction.
When viewed in a section cut in the longitudinal direction of the key, the lower limit stopper 5 has a nested structure in which the built-in operation restricting member 12 is included in the operation restricting member.

The built-in operation restricting member 12 is a member in which a plurality of particles 11 are accommodated in a closed region entirely surrounded by one inner surrounding member 14 and extend in the key arrangement direction.
The outer surrounding member 13 is stacked in close contact with the inner surrounding member 14.
The inner surrounding member 14 has its mounting portion 12a sealed to the horizontal portion 3a by adhesion, fusion or the like. Similarly, the outer surrounding member 13 is sealed by a method such as adhesion or welding to the horizontal portion 3a via the attachment portion 12a at the attachment portion 13a.

In the first example, the above-described stacking of the outer surrounding member 13 and the inner surrounding member 14 is integrated by a method such as adhesion or welding.
If the two materials have different characteristics or have opposite characteristics, one extreme characteristic can be relaxed and a composite characteristic in which both characteristics are well combined can be obtained.
The outer surrounding member 13 is made of, for example, a polyethylene film that is strong in tension but has a small impact absorption, and the inner surrounding member 14 is made of a large shock absorption (cushioning property) such as polyurethane foam. ), But having a weak tensile force, it is possible to obtain a composite characteristic having a high tensile force and a large impact absorption. As a result, a feel desired by the performer can be obtained.

Further, in the second example of the lamination, the two are independent layers that are separated from each other, and the two are simply in contact with each other, and are slidable and slippery. In this case, both may be materials having different characteristics, conflicting characteristics, or the same material.
Even if each of the outer surrounding member 13 and the inner surrounding member 14 is thin, increasing the number of layers to be stacked to increase the thickness of the entire stack increases the strength and durability of the entire surrounding member. At that time, the original characteristics of the thin film material such as flexibility and flexibility are not impaired as compared with the case where a single layer has the same thickness as the entire stack described above. Therefore, this structure is effective when the strength is insufficient with only a single surrounding member.

FIG. 1 (c), the FIG. 1 (d) an example operation for key depression of the white key main body 1 is an explanatory diagram for explaining the function of the lower limit stopper 5.
When the left side surface portion 1e and the right side surface portion 1f of the white key body portion 1 collide with the lower limit stopper 5, the maximum rotation position in the rotation range of the white key body portion 1 is restricted. The same applies to the black key body 2 when its left side and right side (not shown) collide.

When the left side portion 1e and right side surface 1f collide, the kinetic energy, the outer enclosing member 1 3, through the inner enclosing member 1 4 is transmitted to the plurality of particles 11, like a chain reaction, a plurality of particles 11 to each other Sliding or colliding. As a result, the kinetic energy is dispersed and lost, and a large internal loss is obtained. Therefore, the lower limit stopper 5 does not give a repulsive force to the white key main body 1. Therefore, elastic energy is not accumulated and no repulsive force is generated against the white key main body 1. As a result, an unpleasant touch feeling is eliminated.

When the user makes a key release operation, the white key main body portion of the left side portion 1e, the lower end of the right side portion 1f is, when away from the lower limit stopper 5, by an outer-side surrounding member 1 3 and the inner side enclosing member 14 shrinks Returning to the initial state of FIG.
In the present specification, a structure in which a plurality of particles are generally surrounded (partially or completely surrounded) by an enclosing member may be simply referred to as a “particle bag” hereinafter.
The particles 11 are solid objects and are illustrated as spheres, but are not limited to spheres. The outer dimension is preferably 3 mmφ or less in the case of a sphere. The sand and metal powder described in Patent Document 1 may be used, and ceramic, metal, and plastic may also be used.

The laminated outer enclosure member 13 and inner enclosure member 14 restrain the plurality of particles 11 in a closed region and comprehensively restrain the behavior of the particles 11.
Outer enclosing member 13, the inner enclosing member 14, more specifically, elastic, internal, good Material surface area of the enclosing member you stretch in response to force applied from the outside. However, these surrounding members may be bent or slack freely like a cloth without expanding and contracting.

As the outer surrounding member 13 and the inner surrounding member 14 described above, a mesh-like surrounding member, for example, a woven fabric (cross), a knitted fabric (knit), or a nonwoven fabric can be used. A thin film (film) such as plastic, natural rubber, or synthetic rubber may be used. These may be foams. The thin film may have a plurality of vent holes.
If the outer surrounding member 13 and / or the inner surrounding member 14 have air permeability, when the white key main body 1 and the black key main body 2 collide with the lower limit stopper 5, the air pressure inside the built-in operation restricting member 12. The elastic repulsive force due to is not generated.
Moreover, the keyboard frame 3a which is a base material may have air permeability.

The outer surrounding member 13 and the inner surrounding member 14 extend over the entire key width in the key arrangement direction, and both ends of the outer surrounding member 13 and the inner surrounding member 14 are applied with the same material as each other. Sealing or sealing with another member prevents the particles 11 from coming out from both ends.
As for other surrounding members to be described later, those extending over the entire key width in the key arrangement direction are similarly sealed at both ends.

FIG. 2 is an explanatory view schematically showing another specific example of the lower limit stopper shown in FIG. 1, and is a cross-sectional view schematically showing the lower limit stopper 21 cut in the longitudinal direction of the key.
In the figure, parts similar to those in FIGS. 6 and 1 are denoted by the same reference numerals, and description thereof is omitted.
The lower limit stopper 21 shown in FIG. 2 (a) is one in which the inner surrounding member 23 of the built-in operation restricting member 22 surrounds the entire closed region containing a plurality of particles. No attachment portion to the inner enclosing member 23, the outer enclosing member 1 3 laminated is Installing the horizontal portion 3a which is a base material.

In the illustrated example, the inner surrounding member 23 is cylindrical, and the cross-sectional shape of the closed region in which the plurality of particles 11 are accommodated is circular, but this cross-sectional shape is arbitrary.
In order to create the cylindrical inner surrounding member 23, the inner surrounding member 23 itself is formed into a tubular shape for bag weaving, circular knitting, and cylindrical injection molding, as well as the end of two superimposed rectangular materials. There are also methods for joining the parts or rounding and joining rectangular materials into a cylindrical shape.

Lower limit stopper 31 shown in FIG. 2 (b), has a built-in movement limiting members 32 and 33 which are divided, the outer enclosing member 1 3, together with the horizontal portion 3a, surrounds the whole of the internal movement limiting members 32 and 33 is doing.
Internal movement limiting members 32 and 33 each have an inner enclosing member 34 and 35, are stacked in contact with the outer enclosing member 1 3, are arranged in parallel with respect to the arrangement direction of the key.
The built-in operation restricting members 32 and 33 shown in the figure are provided in each of a region obtained by dividing a closed region having a substantially circular cross-section that accommodates a plurality of particles into two vertically and extends in the key arrangement direction.

The plurality of particles 11 accommodated in each of the closed regions surrounded by the inner surrounding members 34 and 35 move in the respective closed regions, but their behavior is restricted by the inner surrounding members 34 and 35.
The group of particles 11 accommodated in the inner enclosure member 34 and the group of particles 11 accommodated in the inner enclosure member 35 may have the same operation restriction characteristic, but have different operation restriction characteristics. Also good.
For example, since the behavior of particles changes according to the material, shape, size, total number of particles 11 and the like, and the operation regulation characteristics differ, the particles contained in each divided closed region If particles having different characteristics or conflicting characteristics are selected for the group, composite characteristics combining the characteristics of each particle group can be obtained.

The lower limit stopper 41 shown in FIG. 2C includes a built-in operation restricting member 42 surrounded by a keyboard frame horizontal portion 3a and an outer surrounding member 43 as a base material, and a part of the outer surrounding member 43, an example shown in the figure. Then, the upper half surface including the collision surface is surrounded by the outermost surrounding member 44.
Here, the built-in operation restricting member 42 is accommodated in a closed region in which the plurality of particles 11 are entirely surrounded by the innermost surrounding member 45, and the innermost surrounding member 45 is surrounded by the inner surrounding member 46, It extends in the arrangement direction.

In the illustrated example, the innermost surrounding member 45 does not have an attachment portion, and is attached to the horizontal portion 3 a that is a base material by the laminated inner and outer surrounding members 46 and 43. The cross-sectional shape of the closed region in which the plurality of particles 11 are accommodated is arbitrary.
The outermost surrounding member 44, the outer surrounding member 43, the inner surrounding member 46, and the innermost surrounding member 45 are laminated in contact with each other.
Of these, the outermost surrounding member 44 and the outer surrounding member 43 need to be integrated by a method such as adhesion. However, the other outer layers are independent layers that can be slid. It may be a thing.

When the left and right side surfaces of the white key main body 1 and the black key main body 2 collide with the lower limit stoppers 5, 21, 31, 41, there appears to be a plurality of surrounding members on the action line where the impact force is distributed and transmitted. As a result, the strength and durability against impact force are increased, and the characteristics of the surrounding member layers are reflected in the braking characteristics and the like.
As an example of the material, the outermost surrounding member 44 is felt for reinforcement, the outer surrounding member 43 is a rubber sheet, the inner surrounding member 46 is foamed plastic such as foamed polyurethane, and the innermost surrounding member 45 is polyethylene or the like. The plastic film is used.

The lower limit stopper 51 shown in FIG. 2 (d) is one in which a part of the built-in operation restricting portion 52 is surrounded by the outer surrounding member 53 in the key arrangement direction. It may be surrounded by the outer surrounding member 53 at a plurality of locations in the key arrangement direction.
The built-in operation restricting portion 52 is accommodated in a closed region in which a plurality of particles 11 (not shown) are entirely surrounded by the horizontal portion 3a as a base material and the inner surrounding member 54, and the outer surrounding member 53 and the inner surrounding member 54 are accommodated. Are stacked and extend in the key arrangement direction.

The outer surrounding member 53 is a mesh-like surrounding member, and is used for reinforcement. The left and right side portions of the white key main body 1 and the black key main body 2 collide with a portion where the outer surrounding member 53 is laminated with the inner surrounding member 54.
The outer surrounding member 53 and the inner surrounding member 54 are sealed to the horizontal portion 3a at their attachment portions 53a and 54a.

FIG. 3 is a cross-sectional view schematically showing still another specific example of the lower limit stopper 5 shown in FIG. 1 cut in the longitudinal direction of the key. In the figure, the same reference numerals are used for the same parts as in FIGS.
As shown in FIG. 3 (a), the lower limit stopper 61 of this embodiment has a plurality (three in the illustrated example) of built-in operation restricting members 62 (subscript omitted). Along with the plurality of outer particles 63 that are not accommodated in the built-in operation restricting member 62, the whole is surrounded by the horizontal portion 3a as the base material and the outer surrounding member 64, and extends in the key arrangement direction.
That is, a plurality of particles are also present between the built-in operation restricting member 62 and the outer surrounding member 64 outside thereof. Each built-in operation restricting member 62 is accommodated in a closed region where the plurality of inner particles 66 are entirely surrounded by the inner surrounding member 65 and extends in the key arrangement direction.

As shown in FIG. 3B, when the left and right side surfaces 1e and 1f of the white key main body 1 or the black key main body 2 collide with the lower limit stopper 61 and receive an impact load, the kinetic energy is externally enclosed. through the member 64, is transmitted to a plurality of outer particles 63 and a plurality of internal operation regulation member 62, a chain, a plurality of outer side particles 63 together and built movement limiting member 62 collides or sliding.
At the same time, inside the internal movement limiting member 62, once, after receiving the impact load to the inner enclosing member 6 5, a plurality of inner particles 6 6 will collide or slide, the inner enclosing member 6 5 transmitting the impact load on the outer side particles 63 through.

Thus, a plurality of inner particles 6 6 accommodated in the closed region surrounded by the inner enclosing member 6 5 of the internal movement limiting member 62 is moved to one another, subjected to impact forces through the inner enclosing member 6 5 for its behavior from being bound to the inner enclosing member 6 5, higher the not negligible thickness and material properties of the inner enclosing member 6 5 behave as one large particle. As a result, the lower limit stopper 61 as a whole can obtain composite characteristics based on the behavior of large particles and the behavior of other particles.
Further, for example, if the elastic return force to the inner enclosing member 6 5, when an impact load is lost, tends automatically contract and return to its original shape.

FIG. 4 is an explanatory view schematically showing still another specific example of the lower limit stopper 5 shown in FIG.
4A is an enlarged perspective view of the lower limit stopper 71 as viewed from the rear upper surface, and FIG. 4B is a plan view showing a specific example of the built-in operation restricting member 72 of the lower limit stopper 71. FIG. (C) is a plan view showing still another specific example of the built-in operation regulating member 72. FIG. In the figure, the same reference numerals are used for the same parts as in FIGS.

As shown in FIG. 4A, the lower limit stopper 71 of this embodiment also has the built-in operation restricting member 72 surrounded by the outer surrounding member 73 together with the horizontal portion 3a, and extends in the key arrangement direction. . However, the built-in operation restriction member 72 is divided in the key arrangement direction, and is arranged in series in the key arrangement direction as divided built-in operation restriction members 72 ₁ , 72 ₂ , 72 ₃ ,.
Divided internal movement limiting member 72 _1, 72 _2, 72 _3, ..., the _first inner enclosing member 74, 74 _2, 74 _3, has become a bag ... is closed, the inner enclosing member 74 _1, 74 _2, 74 ₃ ,..., The plurality of particles 11 are accommodated in a closed region surrounded entirely, and extend in the key arrangement direction.
The inner surrounding members 74 ₁ , 74 ₂ , 74 ₃ ,... And the outer surrounding member 73 are integrated and laminated by a method such as adhesion, or are laminated as independent layers that are individually separated.

In order to create the individual divided built-in operation restricting members 72 ₁ , 72 ₂ , 72 ₃ ,..., A plurality of particles are formed in a film-like bag formed into the shape of the inner surrounding members 74 ₁ , 74 ₂ , 74 ₃ ,. 11 may be filled.
Further, as shown in FIG. 4B, first, one end of the short cylindrical inner surrounding member 75 ₁ , 75 ₂ , 75 ₃ ,... Are fastened with a fastening member 76 or stitched with a thread. After pouring a plurality of particles from the other end, the other end may be tightened with a substantially dotted shape.

Alternatively, as shown in FIG. 4C, one end of the long cylindrical inner enclosing member 77 is squeezed into a substantially dot shape and sealed in the same manner as described above. A plurality of particles are poured from the other end, and the closed portion 78 is formed by stitching the inner surrounding member 77 using a fastening member 76 or a thread, or twisting the inner surrounding member 77 itself at a predetermined plurality of division positions. May be. By this closing portion 78, one inner surrounding member 77 becomes a plurality of divided built-in operation restricting members 72 ₁ , 72 ₂ , 72 ₃ ,.

Because of the configuration of the above-described divided built-in operation restriction members 72 ₁ , 72 ₂ , and 72 ₃ , the movement range of the particles 11 is limited to the range of each divided built-in operation restriction member 72 ₁ , 72 ₂ , 72 ₃ . The particles 11 do not move greatly in the key arrangement direction.
Therefore, even when the electronic keyboard instrument is used while being tilted in the key arrangement direction, or when the electronic keyboard instrument is stored or moved with the key arrangement direction set vertically, the particles 11 are arranged in the key arrangement. Since it moves in the direction and is not unevenly distributed, the initial operation restriction characteristic of the stopper member is maintained.

The above-described division position in the key arrangement direction needs to avoid a location where the keys collide. This is because the divided built-in operation restricting members 72 ₁ , 72 ₂ , and 72 ₃ do not perform the original operation restricting function at the dividing position and in the vicinity thereof.
Therefore, the dividing position may be the middle of the positions where the left side of the white key main body 1 and the black key main body 2 are in contact with the lower end of the right side, that is, the center in the width direction of the key. However, it is not necessary to provide all the keys in the center in the width direction. For example, they may be arranged at a ratio of one key to n keys (n is a positive integer).

FIG. 5 is a right side view schematically showing the second embodiment of the present invention.
In the figure, FIG. 1, the same reference symbols are used for like parts as in FIG. 6.
In this embodiment, an operation restricting member using a particle bag, which is a lower limit stopper 89 for the mass body 88, is used.

In the figure, 81 is a white key main body (rotating member), and 82 is a black key main body (rotating member). The keyboard frame 83 has step portions at the front and rear portions in the longitudinal direction of the key, and a horizontal portion 83a is formed between these steps. A key support portion 83b is provided at the rear portion of the horizontal portion 83a, and a mass body support portion 83c is provided in front of the back surface of the horizontal portion 83a.
Key fulcrum portions 81b and 82b are provided at the rear ends of the white key body portion 81 and the black key body portion 82, and are attached to the key support portion 83b so that the white key body portion 81 and the black key body portion 82 can be rotated. Yes.

Front and rear of the stepped portion of the keyboard frame 83 are an attachment portion 83d and an attachment portion 83e to the keyboard frame bottom plate 84. The front surface of the attachment portion 83d is a vertical wall 83f. The keyboard frame bottom plate 84 may be a fixing member on the keyboard frame side, for example, a lower case (shelf plate) of an electronic musical instrument.
The vertical wall 83f has a key guide 85 for the white key body 81. The key guide 85 is inserted into the lower part of the white key main body near the front end 81a. On the other hand, the key guide 86 erected at the front portion of the horizontal portion 83 a is for the black key main body portion 82.
On the horizontal part 83a, the key switch 4 is installed, and there are projections (actuators) (not shown) on the back side of the upper surface of the white key body part 81 and the black key body part 82 so as to face the key switch 4.

A force transmission part 81c protrudes from the lower part of the white key body part 81 and penetrates a hole 83g provided in the horizontal part 83a. A bottom plate is provided at the tip of the force transmission portion 81c, and the upper portion of the bottom plate is removed in the longitudinal direction of the key. Elastic members 87 (the upper surface is not visible) are fixed to the upper and lower surfaces of the bottom plate.
The mass body 88 is provided in each of the plurality of white key main body portions 81 and black key main body portions 82, and is arranged below each key in the key arrangement direction. Mass 88 shown is intended for the white key main body 81, is rotatably supported by the mass body support section 88c, it is rotated via the force transfer portion 8 1 c of the corresponding key.

The mass body 88 generates a moment of inertia with the pivoted fulcrum portion 88c supported by the mass body support portion 83c, the main driven portion 88a and the sub driven portion 88b that engage with the key force transmission portion 81c. It has an arm-like moment of inertia generating portion 88d. The rear end of the inertia moment generation part 88d is a mass concentration part 88e.
The main driven portion 88a and the sub driven portion 88b are engaged with the force transmitting portion 81c so as to sandwich the bottom plate of the force transmitting portion 81c via the elastic member 87.

When the mass body 88 rotates in conjunction with the player's operation of pressing a key, the reaction of the moment of inertia generating portion 88d is given from the white key body portion 81 to the player's finger. When the performer removes his / her finger from the key, the mass body 88 rotates backward by the action of gravity and returns to the position shown in the figure.
The force transmitting portion of the black key main body 82 is in a position overlapping the force transmitting portion 81c in the key arrangement direction, and similarly, a mass body rotatably supported by the mass body supporting portion is provided, and the corresponding black It is rotated by the force transmission part of the key.

Reference numeral 90 denotes an upper limit stopper using a conventional felt material, which is an operation restricting member for the mass body 88. The upper limit stopper 90 is attached to the rear of the back surface of the horizontal portion 83a. When the mass body 88 is rotated by the key depression, the mass concentrating portion 88e collides with the upper limit stopper 90, whereby the mass body 88 is rotated. The maximum rotation position in the range is restricted.
Reference numeral 89 denotes a lower limit stopper for the mass body 88 and is arranged in a band shape on the keyboard frame bottom plate 84.
The internal structure of the lower limit stopper 89 is the same as the lower limit stopper 5 for the key described with reference to FIG.
When the rotated mass body 88 returns in conjunction with the release of the white key body 81, the lower surface of the mass concentrating portion 88e collides so that the mass body 88 assumes the initial position. Regulate operation.

The keyboard structure having the mass body and the rotation direction are not limited to those shown in FIG. Some mass bodies that are inclined at the initial position rise in the vertical direction when the key is pressed. In this case, the particle bag may be subjected to a horizontal collision when it stands up in the vertical direction.
Further, the mass body may be at the upper limit at the initial position, and the mass body may be at the lower limit at the key pressing position.

Other specific lower limit stoppers 21, 31, 41, 51, 61, 71 described with reference to FIGS. 2 to 4 may be used. At this time, when the outer surrounding member 53 surrounds a part in the key arrangement direction as shown in FIG. 2D, the region where the plurality of arranged mass bodies 88 collide is 1 Alternatively, a plurality of outer surrounding members 53 are surrounded.
Further, as shown in FIG. 4, when the built-in operation restricting member 72 is divided in the key arrangement direction, it is divided so that the division positions come in the gaps between the plurality of arranged mass bodies 88. For example, the division position is arranged in one of n (n is a positive integer) gaps.

The above-described upper limit stopper and lower limit stopper installation positions have been described by exemplifying typical positions. Also good.
An upper limit stopper and a lower limit stopper may be provided by arranging the conventional elastic type movement restriction member using a conventionally known felt or the like on the movement restriction member described above.
The upper limit stopper and the lower limit stopper do not need to be arranged on the keyboard frames 3 and 83 themselves, and may be arranged on the fixed side with respect to the key and the mass body 88, such as the keyboard frame bottom plate 84 shown in FIG.
In the above description, the built-in operation restricting member using the particle bag is surrounded by the outer enclosing member, and the operation restricting member is used as the lower limit stopper, but as the upper limit stopper for the key and / or the mass body. It can also be used.

It is explanatory drawing which shows typically 1st Embodiment of this invention. It is explanatory drawing which shows typically the other specific example of the lower limit stopper shown in FIG. It is explanatory drawing which shows typically the other specific example of the lower limit stopper shown in FIG. It is explanatory drawing which shows typically the other specific example of the lower limit stopper shown in FIG. It is a right view which shows typically the 2nd Embodiment of this invention. It is a right view which illustrates typically the keyboard apparatus of the conventional electronic musical instrument.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... White key main-body part (rotating member), 1b ... Key fulcrum part, 1c ... Stopper piece, 1d ... End part of stopper piece, 1e ... Left side part, 1f ... Right side part, 2 ... Black key main-body part (turning) Member), 2b ... key fulcrum part, 2c ... stopper piece, 2d ... tip end part of the stopper piece, 3 ... keyboard frame (frame), 3a ... horizontal part, 3b ... key support part, 3c ... parallel slit, 4 ... key switch 5 ... Lower limit stopper (operation restricting member), 6 ... Upper limit stopper, 11 ... Particle, 12 ... Built-in operation restricting member, 13 ... Outer surrounding member, 14 ... Inner surrounding member,

21 ... Lower limit stopper (operation restricting member), 22 ... Built-in operation restricting member, 23 ... Inner surrounding member, 31 ... Lower limit stopper (operation restricting member), 32, 33 ... Built-in operation restricting member, 34, 35 ... Inner surrounding member, 41 ... Lower limit stopper (operation restricting member), 42 ... Built-in operation restricting member, 43 ... Outer surrounding member, 44 ... Outermost surrounding member, 45 ... Inner surrounding member, 46 ... Inner surrounding member, 51 ... Lower limit stopper (operation restriction) Member), 52 ... built-in operation restricting part, 53 ... outer surrounding member, 54 ... inner surrounding member, 61 ... lower limit stopper (motion restricting member), 62 ... built-in operation restricting member, 63 ... outer particle, 64 ... outer surrounding member, 65 ... inner enclosing member, 66 ... inner particles, 71 ... lower limit stopper (action restricting member), 72 ... internal movement limiting member, 72 _1, 72 _2, 72 ₃ ... divided internal movement limiting member, 74 _1, 74 ₂ 74 ₃ ... inner enclosing member, 75 _1, 75 _2, 75 ₃ ... inner enclosing member, 76 ... fastening member, 77 ... inner enclosing member

  81 ... White key body (rotating member), 81b ... Key fulcrum, 82 ... Black key body (turning member), 82b ... Key fulcrum, 83 ... Keyboard frame (frame), 83a ... Horizontal, 83b ... key support part, 83c ... mass body support part, 83g ... hole, 84 ... keyboard frame bottom plate, 85 ... key guide (for white key), 86 ... key guide (for black key), 87 ... elastic member, 88 ... mass Body, 88c ... rotation fulcrum, 88e ... mass concentration part, 89 ... lower limit stopper (operation restricting member), 90 ... upper limit stopper

Claims (5)

An electronic musical instrument having a plurality of rotating members arranged side by side, a frame that supports the plurality of rotating members, and an operation restricting member that restricts the rotation range of the rotating members when the rotating members collide with each other. In the keyboard device of
At least one of the operation restricting members is one in which one or more built-in operation restricting members are partially or entirely surrounded by an outer surrounding member, and extend in the arrangement direction of the plurality of rotating members,
The internal operation regulating member state, and are not a plurality of particles are contained in the closed region partially or surround the entirety by inner enclosing member, extending in the arrangement direction of the plurality of rotating members,
The particles have a particle size of 3 mm or less.
A keyboard device for an electronic musical instrument. At least one of the built-in operation restriction members is an inner enclosure member of the built-in operation restriction member laminated with the outer enclosure member.
The keyboard device for an electronic musical instrument according to claim 1. At least one of the internal movement limiting member, a plurality of particles which are not accommodated in the internal operation restricting member state, and are not partially or surrounds the entire by the outer enclosing member,
Particles not contained in the built-in operation regulating member have a particle size of 3 mm or less.
The keyboard device for an electronic musical instrument according to claim 1. The inner side enclosing member of the internal movement limiting member, enclosed area in the outer-side surrounding member is divided into a plurality of regions, at least one of the particles contained in each divided region is is divided The particle group accommodated in the other region has different operation regulation characteristics,
The keyboard device for an electronic musical instrument according to any one of claims 1 to 3, wherein the keyboard device is an electronic musical instrument. The one or more built-in operation restriction members are divided and arranged in parallel in the arrangement direction of the plurality of rotating members.
The keyboard device for an electronic musical instrument according to any one of claims 1 to 4, wherein the keyboard device is an electronic musical instrument.

Images