JP5282432B2 - Keyboard device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily set a static load and a dynamic load for obtaining touch feeling when pushing a key, in a keyboard device of an electronic musical instrument. <P>SOLUTION: A hammer structural body 2 is constituted of a columnar long rod-like mass body 21 and a holder part 22. The hammer structural body 2 is turned by pushing a driven part 22a of the holder part 22 with a key side driving part 12, in the first key push, a side opposite to the driven part 22a in the rod-like mass body 21 is made to serve as a main mass part 21A, the rod-like mass body 21 is extended to a driven part 22a side, and an extended part is made to serve as a counter mass part 21B. The static load and the dynamic load are set in response to lengths of the main mass part 21A and the counter mass part 21B. The counter mass part 21B is bent to secure a space. A bent angle of the counter mass part 21B is regulated in response to a mass of the main mass part 21A. The counter mass part 21B is regulated in response to the mass of the main mass part 21A, to make the static load equal in a plurality of keys. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a keyboard device for an electronic musical instrument including a key that is displaced by a key pressing operation and a hammer structure that rotates in conjunction with the displacement of the key.

  Conventionally, in an acoustic piano, the dynamic load of a key (dynamic touch feeling) at the time of key pressing differs depending on the sound range due to a mechanism such as the thickness of a string or the size of a hammer to hit a string. And this dynamic load becomes heavier toward the bass side. On the other hand, in the keyboard device of an electronic musical instrument, a technique for obtaining the touch feeling of the acoustic piano is disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-20808 (Patent Document 1) or Japanese Patent No. 2904158 (Patent Document 2). ing.

  In Patent Document 1, holes are provided in the front portion and the rear portion with respect to the fulcrum of the key body, so that the static load (static touch feeling) is adjusted to a desired size together with the dynamic load of the key.

In Patent Document 2, a hammer is formed by stacking a plurality of mass body unit members, and the dynamic load is set by varying the number of mass body unit members for each sound range. In addition, according to Patent Document 2, the mass unit unit member of the hammer has a circular front end portion and a rear end portion of the fulcrum, and the center of gravity of the hammer is in the vicinity of the rotation fulcrum so that the static load is constant. Try to keep on. In addition, in Patent Document 2, as a prior art, a weight for compensation is provided so that the static pressure operating force to the key is constant by changing the mass distribution of the weight, thereby making the static load uniform. Has been disclosed.
Japanese Patent Laid-Open No. 2004-20808 Japanese Patent No. 2904158

  In the case of Patent Document 1, since a hole is formed in the key body, it is difficult to ensure the robustness of the key, and dynamic load and static load are affected by the position, size, or number of holes. There are problems that a large number of conditions for the holes must be set, it is difficult to set an optimal dynamic load and static load, and the design and manufacturing process is complicated.

  Moreover, in the thing of patent document 2, although the mass body unit member has the shape of an array which has a circular front-end part and a circular rear-end part, the area (volume) of this front-end part and a rear-end part moves. Affects load and static load. For this reason, it is necessary to design in consideration of the balance between the circular front end and the circular rear end, and to improve the processing accuracy of the mass unit member. Therefore, there is a problem that it takes time to design and process.

  Further, when another part such as a weight is provided on the key or the hammer mechanism, there is a problem that processing on the key side becomes necessary or the number of parts of the hammer mechanism increases.

  It is an object of the present invention to improve a hammer structure of a keyboard device so that an optimal dynamic load and static load can be easily set with a simple configuration.

In the keyboard device according to claim 1, the hammer structure is composed of a holder portion having a rotation fulcrum and a rod-like mass body that is long and uniform in length in the longitudinal direction of the key held by the holder portion, The part of the rod-shaped mass opposite to the driven part driven by the key is the main mass part, the rod-shaped mass penetrates the holder part , and the key-side driving part is driven on the driven part side. By extending beyond the position where the part is driven , the extended part is used as a counter mass part with respect to the main mass part.

In the keyboard device according to claim 2, the hammer structure is composed of a holder portion having a rotation fulcrum and a rod-like mass body that is long and uniform in length in the longitudinal direction of the key held by the holder portion, Of this rod-shaped mass body, the portion opposite to the driven portion driven by the key is the main mass portion, and this extending portion is extended from the holder portion to the driven portion side. The counter mass part is used as a counter mass part with respect to the main mass part , and the length of the counter mass part in the front-rear direction is reduced and the mass of the counter mass part is increased by bending the bar-shaped mass part of the counter mass part.

  The keyboard device according to claim 3 is the keyboard device according to claim 1 or 2, wherein the shape of the counter mass part is set according to the mass of the main mass part, and the static load of the hammer structure by the main mass part and the counter mass part is applied. The same for multiple keys.

  A keyboard device according to a fourth aspect is the keyboard device according to any one of the first to third aspects, wherein the driven portion of the hammer structure and the counter mass portion penetrate the key side driving portion of the key.

  A keyboard device according to a fifth aspect is the keyboard device according to any one of the first to fourth aspects, wherein the angle on the key side formed by the main mass portion and the counter mass portion is larger than 180 °.

  According to the keyboard device of claim 1, in the rod-shaped mass body having a uniform thickness of the hammer structure, a portion on one side (opposite side of the driven portion) of the holder portion is a main mass portion, and the driven portion side Since the portion extending to is used as a counter mass part, the mass is determined by the length of each counter. Further, even when the main mass part and / or the counter mass part is a straight line or when a part thereof is bent, the center of the straight line or the center of each bent side element becomes the center of gravity. The moment of inertia can be calculated easily and the design becomes easy. Further, since the main mass portion and the counter mass portion are constituted by a single rod-shaped mass body, no extra parts are required.

  According to the keyboard device of the second aspect, in addition to the effect of the first aspect, a space on the driven portion side where the counter mass portion is located can be secured.

  According to the keyboard device of the third aspect, in addition to the effect of the first or second aspect, the static loads of the plurality of keys can be easily made the same.

  According to the keyboard device of the fourth aspect, in addition to the effect of the first, second or third aspect, the following effect can be obtained. The key (key side drive unit) must be connected to the hammer structure in order to improve the followability at the time of keystroke and key release, but the driven part and the counter mass part penetrate the key side drive part. As a result, the degree of freedom of adjustment of the connecting portion is increased.

  According to the keyboard device of the fifth aspect, in addition to the effect of the first, second or third aspect, the driven part is driven by the key side driving part because the main mass part has an angle in a direction away from the key. Then, when the main mass portion opposite to the driven portion rotates, the rotation range of the main mass portion can be widened, and a heavy touch like a piano can be realized.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of the main part of the key structure device according to the first embodiment of the present invention, and FIG. 2 is a perspective view of the main part of the hammer structure of the keyboard device. Hereinafter, in each embodiment, unless there is a possibility of confusion, similar elements will be described by adding the same reference numerals. In FIG. 1, the left side of the drawing is the player's side, and the direction perpendicular to the drawing is the key arrangement direction. In the following description, “up / down / left / right” of the keyboard device is an upright state as viewed from the player side during the performance. The meaning of “up, down, left and right” in FIG. Also, when referring to the “front-rear direction (or front and back)”, the performer side is “front, front” and the back side is “back, back”.

  The keyboard device is, for example, an electronic keyboard instrument, and includes a key 1, a hammer structure 2, and a key frame 10 formed of, for example, a hard synthetic resin. The key 1 includes a key body 11, a key-side drive unit 12 that is suspended from the lower surface of the key body 11, and a thin horizontal hinge 13 that extends rearward from the rear end of the key body 11. And the support part 14 arrange | positioned at the rear end of the horizontal hinge part 13 is integrally formed.

  The support portion 14 is fixed to the support base portion 10 a of the key frame 10. The key 1 is made of a synthetic resin and is an elastic member having elasticity especially in the horizontal hinge portion 13. Therefore, the key body 11 can swing up and down with respect to the key frame 10 with the horizontal hinge 13 as a swing fulcrum. Although FIG. 1 mainly shows the structure of one white key, a large number of white keys and black keys having the same configuration are provided side by side in the key arrangement direction.

  The hammer structure 2 is disposed below the key 1, and the hammer structure 2 includes a long cylindrical rod-shaped rod-shaped mass 21 that extends in the front-rear direction, and a holder portion 22 that holds the rod-shaped mass 21. have. A driven portion 22 a is formed on the front side of the holder portion 22, and the driven portion 22 a is in contact with the key side driving portion 12. Further, the holder portion 22 is pivotally supported on a shaft 23 as a rotation fulcrum, whereby the hammer structure 2 is rotatably supported with respect to the key frame 10. In addition, although the rod-shaped mass body 21 of the following 2nd-7th embodiment is also bent, each embodiment is a long cylindrical rod-shaped shape like FIG.

  With the above configuration, the operation is as follows. When the key 1 is depressed, the key side driving portion 12 of the key 1 pushes down the driven portion 22a of the hammer structure 2 as shown by the one-dot chain line in FIG. It rotates counterclockwise in FIG. 1 as a moving center. When the key 1 is released, the hammer structure 2 is rotated clockwise in FIG. 1 by the weight of the mass bar 21, and the key 1 is operated in cooperation with the elastic force of the horizontal hinge portion 13 of the key 1. Return.

  In the hammer structure 2, the rod-shaped mass body 21 penetrates the holder portion 22 in the front-rear direction, and a rear portion (a portion opposite to the driven portion 22 a) of the rod-shaped mass body 21 is a main mass portion 21 </ b> A. . Moreover, the front part (part by the side of the driven part 22a) of the rod-shaped mass body 21 is the counter mass part 21B.

  Here, the touch feeling of the keyboard device includes a dynamic load when the key 1 is pressed and a static load when the key is pressed very slowly. Although the dynamic load mainly depends on the weight of the keyboard 1, it is mainly determined by the moment of inertia about the axis 23 of the hammer structure 2, and the static load is determined by the rotational moment about the axis 23 of the hammer structure 2. . The inertia moment and the rotational moment are determined by the masses of the main mass portion 21A and the counter mass portion 21B (rotational moment is the weight) and the distance from the center of gravity to the shaft 23. On the other hand, in the hammer structure 2 of this embodiment, the main mass portion 21A and the counter mass portion 21B are configured by the rod-shaped mass pair 21 having the same thickness. The dynamic load and the static load can be set only by determining the respective lengths of 21B.

  FIG. 3 is a side view showing the hammer structure 2 according to the second embodiment. In this second embodiment, the counter mass portion 21B is bent. Of these side elements 21B1, 21B2, and 21B3, The element 21B1 is coaxial with the main mass body 21A, and the side elements 21B2 and 21B3 are bent so as to form an angle of 90 ° and 180 ° with respect to this axis, respectively. According to the second embodiment, a space can be secured in the portion of the counter mass portion 21B. That is, there are various parts such as the key frame 10 and a board (not shown) below the key 1 of the keyboard device, and the mounting space for the hammer structure 2 is limited. Therefore, it is possible to mount a sufficient weight even in a small space by bending the counter mass portion 21B.

  In the hammer structure 2 of the second embodiment, the lengths of the side elements 21B1, 21B2, and 21B3 of the counter mass portion 21B are determined, the distance between the center (center of gravity position) and the shaft 23, and the first The dynamic load and static load can be set in consideration of the action of the main mass portion 21A similar to the embodiment.

  FIG. 4 is a side view showing the hammer structure 2 of the third embodiment. In the third embodiment, the main mass portion 21A is bent, and the side elements 21A1, 21A2, and 21A3 are side edges. The element 21A1 is coaxial with the counter mass body 21B, and the side elements 21A2 and 21A3 are bent so as to form an angle of 90 ° and 180 ° with respect to this axis, respectively. Here, FIG. 4A shows the case of the high sound range, and FIG. 4B shows the case of the low sound range. The lengths of the side element 21A3 of the main mass part 21A and the counter mass part 21B in the high sound range are the low sound range. This is shorter than the length of the side element 21A3 of the main mass portion 21A and the counter mass portion 21B. That is, the shape of the counter mass portion 21B is set according to the mass of the main mass portion 21A, and the static load of the hammer structure 2 by the main mass portion 21A and the counter mass portion 21B is set between a plurality of keys in the high range and the low range. Are the same.

  FIG. 5 is a side view showing the hammer structure 2 according to the fourth embodiment. In this fourth embodiment, in addition to the configuration of the fourth embodiment, the counter mass part 21B is also bent in the same manner as in the second embodiment. Is. Also in this example, FIG. 5A shows the case of the high sound range, and FIG. 5B shows the case of the low sound range. The lengths of the side element 21A3 of the main mass part 21A and the side element 21B1 of the counter mass part 21B in the high sound range. Is shorter than the length of the side element 21A3 of the main mass part 21A in the low sound range and the side element 21B1 of the counter mass part 21B. That is, similarly to the third embodiment, the shape of the counter mass unit 21B is set according to the mass of the main mass unit 21A, and the static load is made the same for a plurality of keys in the high frequency range and the low frequency range.

  FIG. 6 is a side view showing the structure of the hammer structure 2 according to the fifth embodiment. In the fifth embodiment, FIG. 6 (A) shows the case of the high sound range, and FIG. 6 (B) shows the case of the low sound range. In addition, the length of the side element 21A3 of the main mass portion 21A in the high sound range is shorter than the length of the side element 21A3 of the main mass portion 21A in the low sound range. On the other hand, the counter mass part 21B is bent at one place and is composed of side elements 21B1 and 21B2. The side element 21B2 of the counter mass part 21B in the high sound range (FIG. 6A) is bent to the holder part 22 side, and the side element 21B2 of the counter mass part 21B in the low sound range (FIG. 6B) is from the side element 21B1. Is also bent in the range of the tip side. As a result, the rotational moment of only the counter mass part 21B is set larger in the low sound range than in the high sound range. That is, the rotational moment of the counter mass portion 21B is set according to the rotational moment according to the length of the side element 21A3 of the main mass portion 21A, and thereby, the static load is set between a plurality of keys in the high range and the low range. It is the same.

  7A and 7B are a side view and a front view showing the structure of the hammer structure 2 and the key 1 according to the sixth embodiment, and FIG. 7B is a view taken in the direction of arrows A-A in FIG. . The main mass portion 21A and the counter mass portion 21B of the sixth embodiment are straight lines as in the first embodiment. In this embodiment, the rod-shaped mass body 21 (counter mass portion 21B) is provided so as to penetrate the holder portion 22 and the driven portion 22a, and the portion of the driven portion 22a penetrates the key side driving portion 12. . That is, an engagement hole 12a is formed in the key side drive part 12, and the driven part 22a and the counter mass part 21B are inserted into the engagement hole 12a. Thereby, the key side drive part 12 and the to-be-driven part 22a are connected with the hammer structure 2, and the followability | trackability at the time of the key hit of the key 1 and a key release improves. Further, the degree of freedom of adjustment of the connecting portion between the driven portion 22a and the hammer structure 2 is increased.

  FIG. 8 is a side view showing the structure of the hammer structure 2 and the key 1 according to the seventh embodiment. FIG. 8 shows the key 1 released state, and FIG. 8B shows the key 1 pressed state. . In the seventh embodiment, the angle θ between the main mass portion 21A of the hammer structure 2 and the counter mass portion 21B (the angle θ on the key 1 side) is set to be larger than 180 °. That is, the main mass portion 21 </ b> A has an angle in a direction away from the key 1. Therefore, when the driven part 22a is driven by the key side driving part 12 and the hammer structure 2 rotates, the rotation range of the main mass part 21A can be widened. That is, the rotation range of the main mass portion 21A to the portion S where the key 1 interferes with other members can be widened. Thereby, the heavy touch like a piano is realizable.

  In addition, although the rod-shaped mass body 21 demonstrated the example of a cylindrical shape in the above embodiment, if the thickness is uniform, a prismatic shape may be sufficient. Further, for example, a plurality of long metal plates may be bonded together.

  In the embodiment, the case where the key 1 can be swung has been described. However, any key can be used as long as the key is displaced by pressing the key. For example, the key may move up and down.

It is a principal part side view of the key structure apparatus which concerns on 1st Embodiment of this invention. It is a principal part perspective view of the hammer structure of the keyboard apparatus. It is a side view which shows the hammer structure of 2nd Embodiment of this invention. It is a side view which shows the hammer structure of 3rd Embodiment of this invention. It is a side view which shows the hammer structure 2 of 4th Embodiment of this invention. It is a side view which shows the hammer structure of 5th Embodiment of this invention. It is the side view and front view which show the structure of the hammer structure of 6th Embodiment of this invention, and a key. It is a side view which shows the hammer structure and key of 7th Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Key, 2 ... Hammer structure, 12 ... Key side drive part, 21 ... Rod-like mass body, 21A ... Main mass part, 21B ... Counter mass part, 22 ... Holder part, 22a ... Driven part, 23 ... Shaft ( Rotating fulcrum)

Claims (5)

A key that is displaced by a key-pressing action;
In a keyboard device provided with a hammer structure that rotates in conjunction with the displacement of the key,
The hammer structure includes a holder portion having a rotation fulcrum, a rod-like mass body that is held in the holder portion and is long and uniform in the longitudinal direction of the key, and driven by the key. And a portion of the rod-shaped mass body on the opposite side of the driven portion across the rotation fulcrum is a main mass portion,
By extending the rod-shaped mass body of the hammer structure through the holder portion and extending beyond the position where the key side driving portion drives the driven portion on the driven portion side, the extending portion is A keyboard device characterized by being a counter mass part with respect to the main mass part. A key that is displaced by a key-pressing action;
In a keyboard device provided with a hammer structure that rotates in conjunction with the displacement of the key,
The hammer structure includes a holder portion having a rotation fulcrum, a rod-like mass body that is held in the holder portion and is long and uniform in the longitudinal direction of the key, and driven by the key. And a portion of the rod-shaped mass body on the opposite side of the driven portion across the rotation fulcrum is a main mass portion,
By extending the rod-shaped mass body of the hammer structure from the holder portion to the driven portion side, the extended portion is a counter mass portion with respect to the main mass portion,
A keyboard device characterized in that the length of the counter mass portion in the front-rear direction is reduced and the mass is increased by bending a portion of the bar mass body of the counter mass portion.   The shape of the counter mass part is set according to the mass of the main mass part, and the static load of the hammer structure by the main mass part and the counter mass part is the same among a plurality of keys. Item 3. The keyboard device according to item 1 or 2. A key-side drive unit suspended from the lower surface of the key;
4. The keyboard device according to claim 1, wherein the driven portion and the counter mass portion of the hammer structure penetrate the key side driving portion. 5.   5. The keyboard device according to claim 1, wherein an angle on the key side formed by the main mass portion and the counter mass portion is set to be larger than 180 °.

Images