JP5055995B2 - 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. 10 is an explanatory view schematically showing 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.

The key fulcrum part 1b of the white key body part 1 is attached to the key support part 3b so that the white key body part 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 disposed 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 in the illustrated example.

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, and conventionally felt or polyurethane elastomer is used. Has been.
When the performer presses the key, the key switch 4 is elastically compressed and the switch is turned on. When the key is further pressed, 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 the 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, regarding the upper limit stopper of the hammer (mass body), a “mass part MB” in which the mass body is sandwiched between the lower cushion and the upper cushion is provided in parallel with the upper limit stopper. .
This mass body 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 into a length extending over the entire key width or a plurality of key widths may be applied.
By using the above-mentioned “mass part MB”, it is possible to maintain a firm stop feeling for a long time while suppressing the rebound of the rotating member, the impact on the finger, and the impact sound when the key is depressed. It is described.

However, in Patent Document 1, since the impact of the hammer is received through the lower cushion, and because it is bonded and fixed to the chassis through the upper cushion, a member in which sand or metal powder is wrapped with a bag-shaped member The function cannot be fully demonstrated.
Moreover, the arrangement | positioning for improving the operation | movement control function of the member which wrapped the sand and metal powder mentioned above with the bag-shaped member was not examined. For example, for a member (operation restricting member) wrapped with sand or metal powder in a bag-like member, the characteristics of the member itself are not good, or there is a position where the characteristic is not good in the key arrangement direction. It was not examined.
JP 2003-195853 (FIGS. 4 to 6)

  The present invention has been made in order to solve the above-described problems, and an electronic device having a specific configuration for improving the operation regulating characteristics of an operation regulating member that regulates the rotation range of a rotating member such as a key or a mass body. An object of the present invention is to provide a keyboard device for a keyboard instrument.

According to the first aspect of the present invention, in a keyboard device of an electronic musical instrument having a plurality of rotating members arranged side by side and a frame that supports the plurality of rotating members , by sliding or colliding plurality of particles kinetic energy to obtain a large internal loss is converted into heat energy, is partially or surround the entirety by enclosing member has a plurality of movement limiting member that is housed in the closed area, the plurality of movement limiting member, wherein Ri movement limiting characteristics for pivoting member Do different, and, together with the extending direction of arrangement of said plurality of rotating members are arranged in the longitudinal direction of the plurality of rotating members, said rotating when the kinematic member collides, the Ri Monodea for not giving a repulsive force to the rotation member, the rotation range of the rotating member by the respective rotary members collides with the plurality of operation restricting member Being regulated, Serial is good to be shall the key touch feeling when you operate the keyboard device.
Therefore, when the rotating member collides with the motion restricting member, a large internal loss is obtained by sliding or colliding a plurality of particles, so that the motion restricting member gives a repulsive force to the rotating member. Absent.
The rotating member collides with the plurality of operation restricting members and the operation is restricted by the plurality of operation restricting members, and the rotation range, that is, the initial position and / or the maximum displacement position is restricted.
As a result, the motion regulation characteristics of the plurality of motion regulation members can be integrated or averaged, so that the motion regulation function is improved.
Moreover, it can adjust so that the comprehensive operation | movement control characteristic combining each operation | movement control member may become favorable.

In the invention according to claim 2 , in a keyboard device of an electronic musical instrument having a plurality of rotating members arranged side by side and a frame that supports the plurality of rotating members , by sliding or colliding plurality of particles kinetic energy to obtain a large internal loss is converted into heat energy, is partially or surround the entirety by enclosing member has a plurality of movement limiting member that is housed in the closed area, the plurality of The movement restricting member extends in the arrangement direction of the plurality of rotating members and is arranged in parallel in the longitudinal direction of the plurality of rotating members. When the rotating members collide, the repulsive force is applied to the rotating members. And at least one movement restricting member that restricts movement of the particles in the arrangement direction of the plurality of rotation members , respectively, in the arrangement direction of the plurality of rotation members Arranged in And than, the movement restricting member, said the plurality of movement limiting member, respectively, are disposed at different positions in the arrangement direction of the plurality of rotating members, the collision the respective rotary members within the plurality of movement limiting member wherein with the rotation range of the rotating member is restricted, it is better to shall the key touch feeling when operating the keyboard device by.
Therefore, when the rotating member collides with the motion restricting member, a large internal loss is obtained by sliding or colliding a plurality of particles, so that the motion restricting member gives a repulsive force to the rotating member. Absent.
The rotating member collides with the plurality of operation restricting members and the operation is restricted by the plurality of operation restricting members, and the rotation range, that is, the initial position and / or the maximum displacement position is restricted.
As a result, the motion regulation characteristics of the plurality of motion regulation members can be integrated or averaged, so that the motion regulation function is improved.
The braking characteristic of the movement restricting member with respect to the rotating member is deteriorated at the position of the movement restricting member disposed on the movement restricting member and in the vicinity thereof.
Therefore, the movement restricting members are arranged at different positions in the arrangement direction with respect to the plurality of operation restricting members, so that the operation restricting characteristics for the plurality of rotating members can be made uniform.

In the invention according to claim 3 , in the keyboard device of the electronic musical instrument having a plurality of rotating members arranged side by side and a frame for supporting the plurality of rotating members , by sliding or colliding A plurality of particles that obtain a large internal loss when kinetic energy is converted into thermal energy have a plurality of motion restricting members that are partially or entirely surrounded by the surrounding member and accommodated in a closed region, The movement restricting member extends in the arrangement direction of the plurality of rotating members and is arranged in parallel in the longitudinal direction of the plurality of rotating members. When the rotating members collide, the repulsive force is applied to the rotating members. is intended to for not giving closed region of said plurality of operation regulating member, respectively, are separated by at least one dividing position in the arrangement direction of the plurality of rotating members, the division position of the closed region, The plurality of operating rules To members, respectively, are disposed at different positions in the arrangement direction of the plurality of rotating members, the rotation range of the rotating member is restricted by the respective rotary members collides with the plurality of operation restricting member Rutotomoni a good to shall the key touch feeling when operating the keyboard device.
Therefore, when the rotating member collides with the motion restricting member, a large internal loss is obtained by sliding or colliding a plurality of particles, so that the motion restricting member gives a repulsive force to the rotating member. Absent.
The rotating member collides with the plurality of operation restricting members and the operation is restricted by the plurality of operation restricting members, and the rotation range, that is, the initial position and / or the maximum displacement position is restricted.
As a result, the motion regulation characteristics of the plurality of motion regulation members can be integrated or averaged, so that the motion regulation function is improved.
The braking characteristic of the motion restricting member with respect to the rotating member is deteriorated at the divided position and the vicinity position disposed in the closed region of the motion restricting member.
Therefore, the division | segmentation position is each arrange | positioned with respect to several operation | movement control members in the position which differs in an arrangement direction, The operation | movement control characteristic with respect to a some rotation member can be equalize | homogenized.
The closed region of the operation restricting member described above is divided, for example, by forming a closing portion on the surrounding member of the operation restricting member. Or it divides | segments by dividing | segmenting operation | movement control member itself.

The keyboard device for an electronic musical instrument according to any one of claims 1 to 3 , 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.
Some keyboard devices include a mass body that rotates in conjunction with a key pressing operation, and some do not. 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. Since the key and the mass body are arranged in different areas, the operation restricting member for the key and the operation restricting member for the mass body are different members.
Further, there are upper limit position restriction and lower limit position restriction as the restriction of the rotation range. 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, in a keyboard device for an electronic musical instrument using an operation restricting member having a structure in which a feeling of key touch is good because a repulsive force is not generated when the rotating member collides with the operation restricting member, a single operation is performed. In the case where the characteristics of the restriction member are not good, or there is a position where the characteristic is not good in the longitudinal direction of the key, there is an effect that the operation restriction characteristic is improved and improved.

FIG. 1 is an explanatory view schematically showing a first embodiment of the present invention.
FIG. 1A is a right side view schematically illustrating a keyboard device of an electronic musical instrument, and FIG. 1B is a plan view schematically illustrating the keyboard device of the electronic musical instrument.
FIG. 1C and FIG. 1D are explanatory views schematically showing the behavior of particles from the right side direction with respect to the lower limit stopper, and FIG. 1E schematically shows the behavior of particles from the front direction. FIG.
In the figure, parts similar to those in FIG.

1A and 1B, reference numerals 5 _{1 to} 5 ₃ denote a plurality of lower limit stoppers (operation restricting members), which are arranged on the upper surface of the horizontal portion 3 a of the keyboard frame (frame) 3.
The lower limit stoppers 5 _{1 to} 5 ₃ are long lengths extending in the arrangement direction (key arrangement direction) of the plurality of white key main body portions 1 (rotating members) and the plurality of black key main body portions 2 (rotating members). The operation restricting members are arranged side by side in the longitudinal direction of the key.
Similarly to the lower limit stopper 101 shown in FIG. 10 described in the background art, the lower limit stoppers 5 _{1 to} 5 ₃ are respectively provided with a white key main body 1 (rotating member) and a black key main body 2 (rotating member). By colliding, the maximum rotation position is regulated in the rotation range of the white key main body 1 and the black key main body 2.
The plurality of lower limit stoppers 5 _{1 to} 5 ₃ shown in FIG. 1 have the same structure and the same material, and have the same operation restricting characteristics, for example, the braking force and the original restoring property. Timing is different.

FIG. 1 (c), the reference to FIG. 1 (d), the the function of a single lower limit stopper, the operation of the lower limit stopper 5 ₁ for keystroke of the white key main body 1 will be described as an example.
The lower limit stopper 5 ₁ are those plurality of particles 11 is surrounded partially or entirely by enclosing member 12 in a state of being accommodated in the closed region.
When the white key main body 1 collides with the lower limit stopper 5 _1, by a plurality of particles 11 to each other or collide or slide, because a large internal loss is obtained, the lower limit stopper 5 ₁ white key main body 1 Do not give repulsion to.
In the present specification, a structure in which a plurality of particles 11 are surrounded (partially or completely surrounded) by the surrounding member 12 may be simply referred to as a “particle bag” hereinafter.
On the other hand, in the illustrated example, the upper limit stopper 6 is a motion restricting member having elasticity using a conventional felt or the like (hereinafter referred to as an elastic motion restricting member).

The above-described closed region may be surrounded by the base member and the surrounding member 12 in addition to being surrounded by the surrounding member 12. This base material may be independent of the keyboard frame 3 or the keyboard frame 3 itself.
The lower limit stopper 51 described above is _one in which a plurality of particles are partially or wholly surrounded by a surrounding member 12 having air permeability, or a base material in which a plurality of particles 11 have air permeability and the base material sealed. It is good to be surrounded by the surrounding surrounding member 12 and to be arranged on the keyboard frame 3 side. If breathable, white key main body 1, when the black key main body 2 collides with the lower limit stopper 5 _1, the repulsive force due to the internal air pressure of the surrounding member 12 does not occur.

In the illustrated example, the horizontal portion 3a is used as a base material, and the surrounding member 12 is sealed on the base material by adhesion, fusion, or the like so that the particles 11 are not dissipated.
Instead, a plurality of particles 11 surrounded by a cylindrical surrounding member 12 may be arranged on the keyboard frame 3.
The lower limit stopper 5 ₁ does not have to be arranged to the keyboard frame 3 itself, may be disposed on the other member for fixedly supporting the keyboard device.

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 surrounding member 12 comprehensively restrains the operation of the plurality of particles 11 and is formed of a thin and flexible material (also referred to as a thin skin material).

It is preferable that the kinetic energy when receiving a collision does not hinder the propagation of the kinetic energy to the plurality of particles 11 and can accommodate the plurality of particles in the closed region without hindering the sliding and collision of the particles. By adjusting the flexibility of the surrounding member 12, the feel desired by the player can be obtained.
More specifically, the surrounding member 12 is a material having elasticity, and it is preferable that the surface area of the surrounding member expands and contracts according to the force received from the inside and the outside. However, the surrounding member may be bent or slack freely like a cloth without expanding and contracting.

As the surrounding member 12, a mesh-like surrounding member, for example, a woven fabric (cross), a knitted fabric (knit), or a nonwoven fabric can be used.
As the surrounding member 12, a thin film (film) 44 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.

1 (c) is a lower limit stopper 5 ₁ in a state that is not depressed.
As shown in FIGS. 1D and 1E, when the lower end of the left side surface portion 1e and the right side surface portion 1f of the white key main body collides with the surrounding member 12, the kinetic energy passes through the surrounding member 12. Thus, the kinetic energy is converted into heat energy and disappears when the particles 11 are transferred to the plurality of particles 11 and the particles 11 collide in a chain or slide and move in an arbitrary direction.
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.
On the other hand, as a result of the surrounding member 12 extending in the horizontal direction, the surrounding member 12 restrains the plurality of particles 11 in the closed region and moderately restricts the behavior of the particles 11 by an appropriate contraction force.
When the user makes a key release operation, when the white key main body portion of the left side portion 1e, the lower end of the right side portion 1f, away from the lower limit stopper 5 _1, since the enclosing member 12 shrinks, the initial state of FIG. 1 (c) Return to.

Referring to FIGS. 1A and 1B again, a structure in which a plurality of lower limit stoppers 5 _{1 to} 5 ₃ are arranged in parallel in the longitudinal direction of the key (rotating radial direction of the rotating member) will be described. To do.
When the white key main body 1 is depressed, the left side surface portion 1e and the right side surface portion 1f collide with the plurality of lower limit stoppers 5 ₃ , 5 ₂ , 5 ₁ and are subjected to operation restriction according to the respective operation restriction characteristics. This restricts the maximum rotation position in the rotation range. As a result, since it is possible or averaging or integrating the operation regulation of the respective lower limit stopper 5 _3, 5 _2, 5 _1, thereby improving the movement limiting function.

In the illustrated example, the heights of the lower limit stoppers 5 _{1 to} 5 ₃ are the same, and the lower limit stopper 5 ₃ , the lower limit stopper 5 ₂ , and the lower limit stopper 5 ₁ are arranged in the longitudinal direction of the key with the key fulcrum portions 1b and 2c as base points. It is far away in the order. That is, the white key main body 1 and the black key main body 2 are installed so as to collide with the plurality of lower limit stoppers 5 _{1 to} 5 _{3 at} different time points with a time difference.
As a result, the overall operation regulation characteristic can be changed with time. For example, the braking force can be gradually increased with respect to the depressed key to reduce the impact sound.
Incidentally, by placing the lower limit stopper 5 ₁ to 5 ₃ different on the base height, to adjust the position of the upper surface of the lower limit stopper 5 ₁ to 5 _3, left side portion 1e, the lower limit stopper right side portion 1f at the same time 5 or so as to impinge on _{1-5 3,} may be changing the timing of collision.

The surrounding member 12 extends over the entire key width in the key arrangement direction, and both ends thereof are sealed by applying the same material as the surrounding member 12 or sealed by using another member. To prevent 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 a second embodiment of the present invention.
In the figure, the same reference numerals are used for the same parts as in FIG.
In this embodiment, the white key main body 1 and the black key body 1 and black are made different by changing the material, shape, size, number of the particles 11 of the plurality of lower limit stoppers 21 ₁ , 21 ₂ , the material of the surrounding member 12, the film thickness, etc. The operation restriction characteristics with respect to the key body 2 (rotating member), for example, the braking force and the original returnability (shape reproducibility) are made different.

The particle bag has excellent braking characteristics, but is inferior to the conventional elastic type motion regulating member using felt etc. in terms of shape reproducibility (reproducibility of the initial position and operating range of the rotating member). . Therefore, even with the same particle bag, it is possible to adjust the overall operation regulation characteristics to be favorable by making the operation regulation characteristics different.
At that time, when the heights of the lower limit stoppers 21 ₁ and 21 ₂ themselves, that is, the upper surface positions are different, the left side surface portion 1e and the right side surface portion 1f of the white key main body 1 collide with the lower limit stoppers 21 ₁ and 21 ₂ . The timing of collision can be changed.
For example, if the lower limit stopper that collides first has a relatively large shape restoring force, the lower limit position of the rotational movement range of the white key body 1 is reproduced with relatively high accuracy. Even if the reproducibility of the height position of the lower limit stopper is somewhat inaccurate, the accuracy of the rotational operation range is improved.

The lower limit stoppers 5 ₁ , 5 ₂ , 5 ₃ , 21 ₁ and 21 ₂ described with reference to FIGS. 1 and 2 were long and uniformly formed in the key arrangement direction. Therefore, for example, when the electronic musical instrument is used in a slightly inclined state, the particles 11 in the particle bag are unevenly distributed in the key arrangement direction. If it does so, a key touch feeling will change with the key of a high sound range side, and the key of a low sound range side, or a desired braking function may not be acquired.

FIG. 3 is an explanatory view showing a first modification of the lower limit stopper shown in FIGS.
The lower limit stopper 31 is configured such that a movement restricting member 32 is disposed in the key arrangement direction inside the entire circumference surrounded by the horizontal portion 3a serving as a base material and the surrounding member 12.
In the figure, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals. The plurality of particles 11 are not shown.
The movement restricting member 32 has an H-shaped horizontal cross section. 32a is a vertical wall forming an H-shaped horizontal bar, and 32b is a flange forming an H-shaped vertical bar coupled to both side surfaces of the vertical wall 32a.

The movement restricting member 32 is fixed to the horizontal portion 3a serving as a base material or formed integrally with the horizontal portion 3a, but may be simply placed.
In the illustrated example, the hatched portion of the flange 32b and the surrounding member 12 are joined together by a method such as adhesion, adhesion (eg, double-sided adhesive tape), fusion, or screwing.
The vertical wall 32a serves as a movement restricting portion, and restricts the particles 11 from moving in the key arrangement direction. As a result, the lower limit stopper 31 can maintain the braking function for a long time.
The vertical wall 32a is disposed so as to be located at the middle of the position where the lower end of the left side surface portion 1e and the right side surface portion 1f of the white key main body portion 1 abuts, that is, at the center portion in the key width direction. It is not necessary to arrange in the central part of all the white key main body parts 1 and the black key main body part 2, and it is sufficient to arrange them at a ratio of one key to n keys (n is a positive integer).

However, even when the movement restricting member as described above is used, when the keyboard device is left standing on the wall, or when the keyboard device is carried vertically, the particles 11 surrounded by the surrounding member 12 are not removed. There is a risk of uneven distribution in the key arrangement direction.
Therefore, in the specific example shown below, the movement restricting member is divided into a plurality of regions to prevent the movement of the particles 11 in the key arrangement direction.

FIG. 4 is an explanatory view showing a second modification of the lower limit stopper shown in FIGS.
This lower limit stopper 41 is provided with a movement blocking member outside.
In the figure, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals. The illustration of the particles 11 is omitted.
Reference numeral 42 denotes a movement preventing member. 42a is an arm, 42b is a support part for supporting the arm 42a, and 42c is a base part for fixing the support part 42b to the horizontal part 3a.
43 is a node (dividing position) portion of the particle bag surrounded by the surrounding member 12, and 44 is an abdomen of the particle bag.

  The arm 42 a is outside the enclosing member 12 and serves as a movement preventing portion that crushes the particle bag from the outside of the enclosing member 12 to form a closed portion. The arm 42a divides the closed region of the lower limit stopper 31 formed of a particle bag into a plurality of rooms. Since the plurality of particles 11 are confined in the divided individual closed regions (rooms), movement of the keys in the arrangement direction is prevented.

FIG. 5 is an explanatory view showing a third modification of the lower limit stopper shown in FIGS.
The lower limit stopper 51 is formed by forming a blocking portion on the surrounding member itself.
As shown in FIG. 5A, in order to form the lower limit stopper 51, first, the surrounding member 52 is formed into a cylindrical shape. A rectangular enveloping member 52 is formed by folding a rectangular material formed in a flat shape in half and joining the upper end 52a and the lower end 52b facing each other. A general bonding method of facing surfaces is used, such as fusing of the material itself, bonding using an adhesive, stitching using a thread, and pinching using a pinching member such as a clip.

Next, one end portion of the cylindrical surrounding member 52 is sealed, and the particles 11 are injected from the other end portion. As shown in FIG. 5B, a plurality of closed regions of the particles 11 surrounded by the surrounding member 52 are formed. Divide into rooms.
For this purpose, the particles 11 at the dividing position are moved, the upper and lower surrounding members are crushed, overlapped in a substantially linear shape, and the surfaces similar to the end portions (the upper end portion 52a and the lower end portion 52b) are bonded to each other. The combined substantially linear division position becomes a flat blocking portion 52c.
As shown in the figure, the blocking portion 52c is formed in a direction orthogonal to the boundary line of the end portion (key arrangement direction).
When forming the closed portion 52c, the surrounding member 52 is contracted in the direction of the central axis of the key arrangement, and then joined in a substantially linear shape so that the cross section of the closed region is expanded, and a large number of particles 11 are accommodated. You should be able to do it.

FIG. 6 is an explanatory diagram of another specific example for creating the cylindrical surrounding member shown in FIG. 5.
The surrounding member 61 shown in FIG. 6A uses two rectangular materials formed in a planar shape. The first left end 61a and the right end 61b are overlapped with the second left end 61c and the right end 61d, respectively, and the ends are joined.
The surrounding member 62 shown in FIG. 6 (b) rolls a planar material into a cylindrical shape, and connects the inner end portion 62a and the outer end portion 62b in an overlapping manner.
In FIG.6 (c), the cylindrical surrounding member 63 is used. For example, a bag-woven fabric, a circular knitted fabric, and a thin film injection-molded into a cylindrical shape.
In any specific example, the substantially linear blocking portion at the dividing position is formed by the same method as in FIG.

FIG. 7 is an explanatory diagram of still another specific example for creating the cylindrical surrounding member shown in FIG. 6.
In FIG. 7A, 71 is a lower limit stopper, 72 is a surrounding member, 72a is a closing portion (divided position), and 73 is a fastening member. There is no restriction | limiting in the raw material of the surrounding member 72, What is necessary is just to use the raw material of the surrounding member 12 shown in FIG.
In this specific example, the closing member 72 a is formed by narrowing the surrounding member 72 into a substantially dotted shape with the fastening member 73.

As the fastening member 73, rubber, thread, or string is used. Tie with a string or string, fasten with rubber, or sew with a thread. Further, a metal ring is used as the fastening member 73, and it is caulked with this.
The closing portion 72a can be formed by twisting the surrounding member 72 itself without using the fastening member 73.
Compared with the substantially linear closed portion 42c as shown in FIG. 5, not only is it easier to squeeze into a substantially dotted shape, but also the cross section of the inner surrounding region of the surrounding member 72 is substantially circular. A large number of particles 11 can be accommodated.

FIG. 7B shows a plurality of lower limit stoppers 74 by dividing the member of the lower limit stopper 71 shown in FIG.
Both ends of the divided lower limit stopper 74 are, for example, squeezed into a substantially dotted shape by a fastening member 73 and sealed.

In FIG. 3 described above, the movement restricting member (particle movement restricting position) 32 is provided to make it difficult for the particles to move in the key arrangement direction. On the other hand, in FIGS. By providing the positions (blocking portions) 42, 52c, 72a, the closed region is divided into a plurality of surrounding regions, thereby preventing the particles from moving in the key arrangement direction.
It is necessary to avoid the location where these keys are provided where the keys collide.
This is because the particle bag does not perform the original operation restriction function at the particle movement restriction position, the division position, and the vicinity thereof.
Therefore, if the particle movement restriction position and the division position are the middle of the positions where the left and right sides of the white key body 1 and the black key body 2 are in contact with each other, that is, the center in the width direction of the key. Good.
However, it is not necessary to provide all the keys in the center in the width direction, and they may be arranged at a ratio of one key to n keys (n is a positive integer).

FIG. 8 is an explanatory view schematically showing a third embodiment of the present invention.
In this embodiment, the particle movement restriction position shown in FIG. 3 and the division positions shown in FIGS. 4 to 7 are arranged.
In the figure, the same reference numerals are used for the same parts as in FIG. The lower limit stopper 51 provided with the closing portion 52c shown in FIG. 5 will be described as a specific example using the lower limit stoppers 51 _{1 to} 51 ₃ .
The blocking portions 52c _{1 to} 52c ₃ are arranged at different positions in the arrangement direction of the plurality of white key main body portions 1 and black key main body portions 2 with respect to the plurality of lower limit stoppers 51 _{1 to} 51 ₃ , respectively. Stop moving.

In the illustrated example, the blocking portions 52c _{1 to} 52c ₃ are arranged at a ratio of one key to n = 3 keys, and the division positions in the key arrangement direction of the lower limit stoppers 51 _{1 to} 51 ₃ arranged in parallel are equal. The lower limit stoppers 51 _{1 to} 51 ₃ are arranged so as not to overlap each other. Accordingly, only one of the blocking portions 52c _{1 to} 52c ₃ is arranged in the central portion of any key.
As a result, since the deterioration of the braking characteristics at the divided position and its neighboring positions is not affected as a whole, the operation restriction characteristics can be made uniform for each key.
Even when the operation restriction characteristics of the lower limit stoppers 51 _{1 to} 51 ₃ with respect to the keys are different, it is preferable to distribute the influence of the decrease in the braking characteristics at the divided position and its neighboring positions to a plurality of keys.

The above description is a case where a plurality of rows of particle bags are used as the lower limit stoppers for the white key main body 1 and the black key main body 2.
However, for the upper limit stopper 6 (operation restricting member) shown in FIGS. 1 and 2, a plurality of rows of particle bags having the same structure may be used.
In the specific example described with reference to FIGS. 5 to 8, the cylindrical surrounding member has a closed portion formed therein.
However, even when the closed portion is not formed, a tubular surrounding member is used instead of the surrounding member sealed on the base, such as the operation regulating member described with reference to FIGS. May be.

FIG. 9 is an explanatory view schematically showing a fourth embodiment of the present invention.
In this embodiment, a plurality of rows of particle bags are used for the lower limit stopper and the upper limit stopper for the mass body.
FIG. 9A is a right side view schematically showing the fourth embodiment of the present invention.
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. There is a key support portion 83b at the rear portion of the horizontal portion 83a. On the other hand, there is a mass support part 83c in the front part of the back surface of the horizontal part 83a.
Key fulcrum portions 81b and 82b of the white key main body portion 81 and the black key main body portion 82 are attached to the key support portion 83b so that the white key main body portion 81 and the black key main body portion 82 can be rotated.

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 fixed to the horizontal portion 83 a is for the black key main body portion 82.
On the horizontal portion 83a, the key switch 4 is installed, and oppositely there are protrusions (actuators) (not shown) on the back side of the upper surface of the white key body portion 81 and the black key body portion 82.

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 cannot be seen) 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. The illustrated mass body 88 is for the white key main body 81, is rotatably supported by the mass body support portion 83c, and is rotated via the corresponding key force transmission portion 81c.

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 transmission part of the black key main body part 82 is in a position overlapping the force transmission part 81c, and similarly, a mass body rotatably supported by the mass body support part is provided, and the corresponding black key force transmission part is provided. It is rotated by.

On the upper surface of the horizontal portion 83a, a lower limit stopper 89 for a key using a particle bag is disposed in a band shape.
On the other hand, 90 ₁ and 90 ₁ are upper limit stoppers (operation restricting members) for the mass body 88 and are arranged on the back surface of the horizontal portion 83a, and when the mass body 88 rotates, the upper surface of the mass concentrating portion 88e is By colliding, the upper limit position of the mass body 88 is regulated.
91 ₁ , 91 ₁ are lower limit stoppers (operation restricting members) for the mass body 88, which are arranged on the keyboard frame bottom plate 84 and collide with the lower surface of the mass concentrating portion 28 e when the rotated mass body 88 returns. By doing so, the initial position of the mass body 88 is regulated.

The upper limit stoppers 90 ₁ and 90 ₂ and the lower limit stoppers 91 ₁ and 91 ₂ are the particle bags described with reference to FIGS. Although it is illustrated with a structure having a division position by the blocking portion shown in FIG. 5, other structures may be used.
FIG. 9B is an operation explanatory diagram of the upper limit stoppers 90 ₁ and 90 ₂ .
In both cases, the collision surface is set to be horizontal, but the blocking portion 92c of the surrounding member 92 is fixed to the horizontal portion 83a or the member 32 such as the arm 32a shown in FIG. You may support it while keeping the original shape as.

As shown in FIG. 9B, in the surrounding member 92, it is the lower surface of the abdomen that receives the impact load from the mass concentration portion 88e. Upper limit stoppers 90 ₁ and 90 ₂ are provided on the horizontal portion 83a so that the lower surface of the abdomen is substantially parallel to the substantially linear blocking portion 92c.
The lower limit stoppers 91 ₁ and 91 ₂ are also arranged so that the upper surface of the abdomen serving as the collision surface is substantially parallel to the substantially linear closed portion 92c.

In conjunction with the pressing of the white key main body 21, the upper surface portion of the mass concentrating portion 88e collides with both the upper limit stoppers 90 ₁ and 90 ₂ . On the other hand, in conjunction with the white key main body 21 is released key, the mass concentrated portion 88e is to return to its original initial position, impinges on both the lower limit stopper 91 ₁ and 91 _2.
By making the heights of the upper limit stoppers 90 ₁ and 90 ₂ of the plurality of rows different, or by making the heights of the lower limit stoppers 91 ₁ and 91 ₂ different, the function of the action restriction characteristic of each action restriction member is started. You can also shift the timing.

As the upper limit stoppers 90 ₁ and 90 ₂ and / or the lower limit stoppers 91 ₁ and 91 ₂ , similar to the lower limit stopper for the key body shown in FIG.
Further, similarly to the lower limit stopper for the key main body shown in FIG. 8, a plurality of upper limit stoppers 90 ₁ , 90 ₂ and / or lower limit stoppers 91 ₁ , 91 ₂ are used as the particle movement restricting members. The mass bodies 28 may be arranged at different positions in the arrangement direction, or the division positions of the closed regions of the surrounding members may be arranged at different positions in the arrangement direction of the plurality of mass bodies 28, respectively.
When a movement restricting member is provided or a division position is provided, these are set to be intermediate positions of adjacent mass concentration portions 88e in the key arrangement direction.

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.

The installation positions of the upper limit stoppers and the lower limit stoppers in the plurality of rows described above have been described with reference to typical positions. However, as long as the function restricts the operation of the key and the mass body interlocking with the key, the positions other than the illustrated positions are used. May be provided.
The upper limit stopper and the lower limit stopper need not be arranged on the keyboard frame itself, but may be arranged on the fixed side with respect to the rotating member.
In addition to the upper limit stopper and the lower limit stopper of the plurality of rows described above, an upper limit stopper and a lower limit stopper using felt or the like conventionally used may be added in the longitudinal direction of the key.

It is explanatory drawing which shows typically 1st Embodiment of this invention. It is explanatory drawing which shows typically 2nd Embodiment of this invention. It is explanatory drawing which shows the 1st modification of the lower limit stopper shown in FIG. 1, FIG. It is explanatory drawing which shows the 2nd modification of the lower limit stopper shown in FIG. 1, FIG. It is explanatory drawing which shows the 3rd modification of the lower limit stopper shown in FIG. 1, FIG. It is explanatory drawing of the other specific example for creating the cylindrical surrounding member shown in FIG. It is explanatory drawing of the other specific example for creating the cylindrical surrounding member shown in FIG. It is explanatory drawing which shows typically 3rd Embodiment of this invention. It is explanatory drawing which shows typically 4th Embodiment of this invention. It is explanatory drawing which shows 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, 1e ... Left side part, 1f ... Right side part, 2 ... Black key main-body part (rotating member), 2b ... Key fulcrum part 2c ... stopper piece, 3 ... keyboard frame (frame), 3a ... horizontal part, 3b ... key support part, 3c ... parallel slit, 4 ... key switch, 5, 5 _{1 to} 5 ₃ ... lower limit stopper (operation restricting member) , 6 ... upper limit stopper, 11 ... particles, 12 ... surrounding member, 21 ₁ , 21 ₂ ... lower limit stopper (operation regulating member)

31 ... Lower limit stopper, 32 ... Movement restricting member, 41 ... Lower limit stopper (operation restricting member), 42 ... Movement prevention member, 51, 51 _{1 to} 51 ₃ ... Lower limit stopper (operation restricting member), 52 ... Enclosing member, 52c ₁ ˜52c ₃ ... Closure part, 61, 62, 63, 72... Enclosing member, 71... Lower limit stopper (operation restricting member), 72.

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, 86 ... Key guide, 87 ... Elastic member, 88 ... Mass body, 88c ... Rotation fulcrum part, 88e ... mass concentrating part, 89 ... lower limit stopper, 90 ₁ , 90 ₁ ... upper limit stopper (operation restricting member), 91 ₁ , 91 ₁ ... lower limit stopper (operation restricting member), 92 ... enclosing member, 92c ... closing part, 101 ... Lower limit stopper

Claims (3)

In a keyboard device of an electronic musical instrument having a plurality of rotating members arranged side by side and a frame that supports the plurality of rotating members,
A plurality of particles in which kinetic energy is converted into thermal energy by sliding or colliding to obtain a large internal loss, a plurality of particles surrounded by a surrounding member partially or entirely and accommodated in a closed region Having an operation regulating member,
The plurality of operation regulating member, wherein Ri movement limiting characteristics for pivoting member Do different, and, together with the extending direction of arrangement of said plurality of rotating members are arranged in the longitudinal direction of the plurality of rotating members , when the rotating member is collided, Ri Monodea for not giving a repulsive force to the rotating member,
With the rotation range of the rotating member is restricted by the respective rotary members collides with the plurality of operation regulating member, you in good key touch feeling when operating the keyboard device,
Keyboard device that electronic instruments be characterized in that. In a keyboard device of an electronic musical instrument having a plurality of rotating members arranged side by side and a frame that supports the plurality of rotating members,
A plurality of particles in which kinetic energy is converted into thermal energy by sliding or colliding to obtain a large internal loss, a plurality of particles surrounded by a surrounding member partially or entirely and accommodated in a closed region Having an operation regulating member,
The plurality of operation regulating member is configured to extend in the arrangement direction of the plurality of rotating members are arranged in the longitudinal direction of the plurality of rotating members, when the rotating member has collided, the rotary member At least one movement restricting member for restricting the movement of the particles in the direction of arrangement of the plurality of rotating members , respectively. Are arranged in the arrangement direction of
The movement restricting members are arranged at different positions in the arrangement direction of the plurality of rotating members, respectively, with respect to the plurality of operation restricting members ,
With the rotation range of the rotating member is restricted by the respective rotary members collides with the plurality of operation regulating member, you in good key touch feeling when operating the keyboard device,
Keyboard device that electronic instruments be characterized in that. In a keyboard device of an electronic musical instrument having a plurality of rotating members arranged side by side and a frame that supports the plurality of rotating members,
A plurality of particles in which kinetic energy is converted into thermal energy by sliding or colliding to obtain a large internal loss, a plurality of particles surrounded by a surrounding member partially or entirely and accommodated in a closed region Having an operation regulating member,
The plurality of operation restricting members extend in the arrangement direction of the plurality of rotating members, and are arranged in parallel in the longitudinal direction of the plurality of rotating members. When the rotating members collide, the rotating members Is to give no repulsive force to
The closed regions of the plurality of operation restriction members are each divided at at least one division position in the arrangement direction of the plurality of rotation members,
The closed region division positions are arranged at different positions in the arrangement direction of the plurality of rotation members, respectively, with respect to the plurality of operation restriction members ,
With the rotation range of the rotating member is restricted by the respective rotary members collides with the plurality of operation regulating member, you in good key touch feeling when operating the keyboard device,
Keyboard device that electronic instruments be characterized in that.

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