JP6489329B2 - Electronic musical instrument keyboard device - Google Patents

Description

  The present invention relates to a keyboard device for an electronic musical instrument provided with a reaction force generating member for generating a reaction force due to elastic deformation in response to a player's operation.

  Conventionally, a keyboard instrument such as an electronic organ or an electronic piano may be provided with a reaction force generating member including a rubber dome for applying a reaction force to a key pressing operation. For example, Patent Document 1 below discloses a keyboard device in which a reaction force generating member (key switch) having a rubber dome is provided on a circuit board fixed to a frame that supports a key to be swingable upward. ing. The reaction force generating member is similarly configured with a white key and a black key, and the reaction force generating member for the black key is positioned behind the reaction force generating member for the white key and is pressed by the key when the key is pressed. Therefore, the white key and the black key give the same key touch feeling.

JP-A-11-175067

  However, in the above-described conventional device, the height of the reaction force generating member is the same for the white key and the black key. On the other hand, the stroke amount differs between the white key and the black key. It is difficult to match the touch. Further, the structure is not limited to the above-described conventional device, and the structure of the white key and the black key is generally different, and the length of the key, the stroke amount, the fulcrum position, and the like are generally different between the white key and the black key. In order to solve such a problem, it is necessary to employ reaction force generating members having different sizes, shapes, functions, etc. for the white key and the black key. On the other hand, when adopting a dome-shaped reaction force generating member as in the above prior art, in order to obtain the same key touch feeling with the white key and the black key, the white key and the black key have almost the same size, shape, There is a desire to employ a reaction force generating member having a function and the like.

  The present invention has been made to address the above-mentioned problems and to meet the above-mentioned demands. The purpose of the present invention is to provide a keyboard device for an electronic musical instrument in which almost the same key touch feeling can be obtained with a white key and a black key. It is to provide. In the description of each constituent element of the present invention below, the reference numerals of corresponding portions of the embodiment are shown in parentheses in order to facilitate understanding of the present invention. The present invention should not be construed as being limited to the configurations of the corresponding portions indicated by the reference numerals of the forms.

In order to achieve the above-described object, the present invention is characterized by a plurality of keys including a white key (11w) and a black key (11b) that swing around a swing axis (Cw, Cb) and displace the front end up and down. And a plurality of reaction force generating members provided corresponding to the plurality of keys, each of which is constituted by an elastic body, and is pressed when the plurality of keys are pressed, to the key pressing operation of the plurality of keys. In the keyboard device of an electronic musical instrument provided with reaction force generating members (21w, 21b) that generate reaction forces, the plurality of reaction force generating members are formed in a thin dome shape and elastically deformed by pressing. 21 w 1, 21 b 1) and continuous with the entire lower end of the dome, and are formed integrally with the dome so as to protrude outward from the lower end surface of the dome to support the dome and a base portion, respectively, for the white key Over scan portion of the upper surface and the step (21p, 21q) between the upper surface of the over scan portion base for the black key or inclined (21r) to be provided, base over scan portion for white keys and base over scan for black keys This is because the shapes of the parts are different.

In this case, for example , the dome portion for the white key and the dome portion for the black key may have the same shape and size.

In the present invention configured as described above, a step or slope is provided between the upper surface of the white key base portion and the upper surface of the black key base portion, so that the white key base portion is provided. The shape of the base part for the black key is different. As a result, according to the present invention, the dome portion for the white key and the dome for the black key are also used in the keyboard device that uses the reaction force generation member for the white key and the reaction force generation member for the black key at different heights. The parts can be configured to be the same or substantially the same, and the same key touch feeling can be obtained with the white key and the black key. Also, if the white key and black key reaction force generating members are integrally formed, the integrally formed white key and black key reaction force generating members can be assembled at positions that require different heights. The difference in height between the white key and the black key is absorbed by the base portions for the white key and the black key. As a result, in addition to the effect of obtaining almost the same key touch feeling with the white key and the black key, the assembly of the reaction force generating member is simplified.

1 is a schematic side view of a keyboard device according to a first embodiment of the present invention. It is a schematic plan view of the keyboard apparatus of FIG. FIG. 3 is an enlarged cross-sectional view of a reaction force generation member portion taken along line 3-3 in FIG. 2. It is a schematic side view of the keyboard apparatus which concerns on 2nd Embodiment of this invention. It is a schematic plan view of the keyboard apparatus of FIG. FIG. 6 is an enlarged cross-sectional view of a reaction force generation member portion taken along line 6-6 in FIG. It is a schematic side view of the keyboard apparatus which concerns on 3rd Embodiment of this invention. It is a schematic plan view of the keyboard apparatus of FIG. It is an expanded sectional view of the reaction force generating member portion viewed along line 9-9 in FIG. It is an expanded sectional view which shows the modification of the reaction force generation member part of the said 3rd Embodiment. It is a schematic side view of the keyboard apparatus which concerns on 4th Embodiment of this invention. It is a schematic plan view of the keyboard apparatus of FIG. FIG. 13 is an enlarged cross-sectional view of a reaction force generation member portion viewed along line 13-13 in FIG. It is an expanded sectional view which shows the modification of the reaction force generation member part of the said 4th Embodiment. It is a schematic side view of the keyboard apparatus which concerns on 5th Embodiment of this invention. (A) (B) is explanatory drawing for demonstrating the position of the lower end surface of the dome part of the reaction force generation member for white keys, and the reaction force generation member for black keys.

a. First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view of the keyboard device according to the first embodiment viewed from the right, and FIG. 2 is a schematic plan view of the keyboard device. In the schematic side view of the keyboard device of FIG. 1 and FIGS. 4, 7, 11, and 15 described later, the front-rear direction of the keyboard device is the left-right direction, and the up-down direction of the keyboard device is the up-down direction.

  The keyboard device includes a plurality of white keys 11w and a plurality of black keys 11b that are pressed and released by the performer, and a plurality of reaction force generating members 21w and 21b that apply a reaction force to the performer's key pressing operation. And. The white key 11w is formed in an elongated shape in the front-rear direction and is formed in a U-shaped cross section with the lower part opened, and is disposed on the flat plate upper plate portion 31a of the key frame 31. The key frame 31 has flat leg portions 31b and 31c extending downward from the front and rear ends of the upper plate portion 31a, and a frame FR provided in the instrument at the lower end portions of the leg portions 31b and 31c. It is fixed on the top. On the upper surface of the rear end portion of the upper plate portion 31a of the key frame 31, a pair of plate-like key support portions 32 that are opposed to each other inside the white key 11w are fixed upright. The upper part of the key support part 32 is provided with protrusions protruding outward at positions facing each other, and the protrusions enter the through holes provided at the rear end portions of both sides of the white key 11w so as to be rotatable from the inside. I am letting. Thereby, the white key 11w is supported by the key support part 32 so that rocking is possible, and the front-end part is displaced to an up-down direction. In the following description, the swing center of the white key 11w is defined as a swing axis Cw. The black key 11b is different in the shape in which the front upper surface is raised, but the other configuration is the same as the white key 11w. The black key 11b is also supported by the key support portion 32 so as to be swingable about the swing axis Cb, and the front end portion is displaced in the vertical direction by swinging. In the present embodiment, the rocking shaft Cb of the black key 11b and the rocking shaft Cw of the white key 11w are located at the same position in the front-rear direction and the vertical direction.

  On the upper surface of the upper plate portion 31a of the key frame 31, a key guide 33w is erected at a position below the front end of the white key 11w, and the key guide 33b is erected at a position below the front end of the black key 11b. Has been established. The key guides 33w and 33b are slidably inserted into the white key 11w and the black key 11b, respectively, and the white key 11w and the black key 11b are not displaced in the left-right direction when they are swung in the up-down direction. ing.

  The reaction force generating member 21w is provided for each white key 11w, and the reaction force generating member 21b is provided for each black key 11b. The reaction force generating members 21w and 21b are fixed to the upper surface of the upper plate portion 31a of the key frame 31 below the central portion in the front-rear direction of the white key 11w and the black key 11b. In this case, the position of the reaction force generation member 21w for the white key 11w in the front-rear direction and the position of the reaction force generation member 21b for the black key 11b in the front-rear direction are the same, and the reaction force generation members 21w and 21b are It is arranged in a row in the horizontal direction. A plurality of reaction force generating members 21w and 21b are formed by integral molding.

  Here, the reaction force generating members 21w and 21b will be described. FIG. 3 is an enlarged cross-sectional view of the reaction force generating member portion taken along line 3-3 in FIG. The plurality of reaction force generating members 21w and 21b are integrally formed of elastic rubber. Each reaction force generating member 21w, 21b has dome parts 21w1, 21b1, top parts 21w2, 21b2, and base parts 21w3, 21b3, respectively. The dome portions 21w1 and 21b1 are formed in a point-symmetric dome shape (bowl shape) around the shaft centers Yw and Yb, and are formed in a thin wall that is easily deformed by pressing from above. In other words, the axis lines Yw and Yb are the central axis lines of the main body portions 21w1 and 21b1 and the top portions 21w2 and 21b2. The axis lines Yw and Yb are action lines of force that passes through the starting point of the reaction force vector and extends in the vector direction. Specifically, the dome portions 21w1, 21b1 are elastically deformed by increasing the pressing force from above and gradually increase the reaction force, and after the reaction force reaches its peak, the reaction force is suddenly increased by buckling deformation. Decrease, and then gradually increase the reaction force. The dome portion 21w1 and the dome portion 21b1 have the same shape. In particular, the distance Lw from the lower end surface to the upper end surface of the dome portion 21w1 is equal to the distance Lb from the lower end surface to the upper end surface of the dome portion 21b1. In addition, these dome parts 21w and 21b are corresponded to the main-body part of this invention seen from another viewpoint.

  The top portions 21w2 and 21b2 are formed in a cylindrical shape that is point-symmetric with respect to the axial centers Yw and Yb, and are formed with a thick wall that hardly deforms even when pressed from above. The top portions 21w2 and 21b2 are connected to the upper surfaces of the dome portions 21w1 and 21b1 at the lower surface and set to a uniform height over the entire circumference, and the upper surface is a flat surface. An air escape notch (not shown) for communicating the inside and the outside of the top portions 21w2 and 21b2 is provided in a part of the top portions of the top portions 21w2 and 21b2. The top part 21w2 and the top part 21b2 are formed in the same shape.

  The base portions 21w3 and 21b3 are formed so as to continue downward over the entire circumference of the lower end of the dome portion and project outward from the lower end surfaces of the dome portions 21w1 and 21b1. The base portions 21w3 and 21b3 are also formed with a thick wall that hardly deforms even when pressed from above. The plurality of base portions 21w3 and 21b3 are continuously formed integrally with the adjacent base portions 21b3 and 21w3, and their bottom surfaces constitute a common plane. On the other hand, the upper surfaces of the base portions 21w3 and 21b3 are also flat, but a step 21p is provided on the upper surface between the base portions 21b3 and 21w3. Thereby, the height of the base part 21w3 for the white key 11w is lower than the height of the base part 21b3 for the black key 11b.

  On the lower surface of the base portions 21w3 and 21b3, a plurality of leg portions 22 protruding in a columnar shape vertically downward from the lower surfaces of the base portions 21w3 and 21b3 are provided at appropriate places. The plurality of leg portions 22 are also integrally formed with the dome portions 21w1 and 21b1, the top portions 21w2 and 21b2, and the base portions 21w3 and 21b3 by an elastic body. The leg portion 22 fixes the reaction force generating members 21w and 21b to the support portion 31d provided on the upper plate portion 31a of the key frame 31, and is press-fitted into a through hole provided in the support portion 31d. Note that the leg portion 22 may be omitted, and the lower surfaces of the base portions 21w3 and 21b3 may be fixed on the upper plate portion 31a (support portion 31d) of the key frame 31 with an adhesive or the like.

  Since the upper surface of the support portion 31d is a horizontal plane, the reaction force generating members 21w and 21b are fixed to the upper surface of the support portion 31d in a state where the shaft centers Yw and Yb are kept parallel to each other and perpendicular to the support portion 31d. Has been. Thus, the upper surface of the top portion 21w2 of the reaction force generating member 21w is fixed in a state where the reaction force generating members 21w and 21b are fixed to the upper surface of the support portion 31d due to the difference in height of the base portions 21w3 and 21b3 due to the step 21p. Is lower than the height of the upper surface of the top portion 21b2 of the reaction force generating member 21b. The difference in height between the reaction force generation member 21w (dome portion 21w1) and the reaction force generation member 21b (dome portion 21b1) between when the white key 11w is pressed and when the black key 11b is pressed. The amount of movement of the white key 11w below the front end top surface and the amount of movement of the black key 11b below the front end top surface at the start of deformation, at the reaction force peak, and at the end of deformation are set to be substantially the same. ing.

  Further, the pressing force that presses the reaction force generation members 21w and 21b from above on the lower surface of the white key 11w and the black key 11b, at a position facing the upper surfaces of the top portions 21w2 and 21b2 of the reaction force generation members 21w and 21b. The parts 11w1 and 11b1 are provided. The pressing portions 11w1 and 11b1 are formed in a flat plate shape, and the lower surface thereof is a flat surface and is inclined so as to be higher on the front side and lower on the rear side than the lower surfaces of the white key 11w and the black key 11b. . The inclination of the pressing portions 11w1, 11b1 is such that the normal line (straight line perpendicular to the lower surface) of the pressing portions 11w1, 11b1 is the reaction force generating member 21w, at the peak of the reaction force of the reaction force generating members 21w, 21b. It is set so as to be parallel to the axial centers Yw and Yb of 21b. Further, at the peak of the reaction force generated by the reaction force generating members 21w and 21b, the reaction force direction coincides with the directions of the axes Yw and Yb of the reaction force generating members 21w and 21b. Therefore, at the peak of the reaction force generated by the reaction force generating members 21w and 21b, the reaction force direction is different between the white key 21w and the black key 21b, and the pressing direction of the reaction force generating members 21w and 21b at the peak of the reaction force. It can also be understood that this corresponds to the reaction force direction of the reaction force generating members 21w and 21b. In this case, the inclination of the lower surface of the pressing portion 11b1 of the black key 11b with respect to the horizontal (the lower surface of the black key 11b) is slightly more than the inclination of the lower surface of the pressing portion 11w1 of the white key 11w with respect to the horizontal (the lower surface of the white key 11w). large. If the normal line of the lower surface including the pressing points of the pressing portions 11w1 and 11b1 is set to be parallel to the axial centers Yw and Yb at the peak of the reaction force, the pressing portions 11w1 and 11b1 The lower surface may not be flat but may be spherical. Further, the pressing portions 11w1 and 11b1 may be configured by cross-shaped or H-shaped ribs or the like protruding downward from the inner upper surfaces of the white key 11w and the black key 11b.

  The keyboard device also includes white keys incorporated between the white key 11w and the black key 11b and the upper plate portion 31a of the key frame 31 at an intermediate position between the pressing portions 11w1 and 11b1 and the key support portion 32. An 11w spring 34w and a black key 11b spring 34b are provided. The springs 34w and 34b urge the white key 11w and the black key 11b upward with respect to the upper plate portion 31a. The springs 34w and 34b may be springs such as leaf springs as long as they can urge the white key 11w and the black key 11b upward without being coiled.

  The white key 11w includes an extending portion 11w2 extending downward from the front end portion thereof, and an engaging portion 11w3 protruding forward is provided at the lower end of the extending portion 11w2, and the engaging portion 11w3 is a key frame. Through the through hole provided in the upper plate portion 31a of 31, the lower part of the upper plate portion 31a is entered from above. Further, an upper limit stopper member 35 w is provided on the lower surface of the front end portion of the upper plate portion 31 a of the key frame 31. The upper limit stopper member 35w is composed of a cushioning member such as a felt, and restricts the upward displacement of the front end portion of the white key 11w by contacting the engaging portion 11w3 of the white key 11w. A lower limit stopper member 36 w is provided on the upper surface of the front end portion of the upper plate portion 31 a of the key frame 31. The lower limit stopper member 36w is also composed of a cushioning member such as felt, and restricts the downward displacement of the front end portion of the white key 11w by contacting the lower surface of the front end portion of the white key 11w.

  The black key 11b is provided with an extending portion 11b2 extending downward from the front end portion thereof, and an engaging portion 11b3 protruding backward is provided at the lower end of the extending portion 11b2, and the engaging portion 11b3 is a key frame. Through the through hole provided in the upper plate portion 31a of 31, the lower part of the upper plate portion 31a is entered from above. An upper limit stopper member 35 b is provided on the lower surface of the intermediate portion of the upper plate portion 31 a of the key frame 31. The upper limit stopper member 35b is also composed of a cushioning member such as a felt, and restricts the upward displacement of the front end portion of the black key 11b by contact with the engaging portion 11b3 of the black key 11b. A lower limit stopper member 36b is provided on the upper surface of the intermediate portion of the upper plate portion 31a of the key frame 31. The lower limit stopper member 36b is also composed of a cushioning member such as a felt, and restricts the downward displacement of the front end portion of the black key 11b by contacting the lower surface of the front end portion of the black key 11b.

  Further, the electric circuit board 37 is fixed so as to be parallel to the upper plate portion 31a on the lower surface of the upper plate portion 31a of the key frame 31 and slightly behind the reaction force generating members 21w and 21b. On the upper surface of the electric circuit board 37, dome-shaped key switches 38w and 38b for the white key 11w and the black key 11b are fixed, respectively. The key switches 38w and 38b are pressed by the projecting portions projecting from the lower surfaces of the white key 11w and the black key 11b when the white key 11w and the black key 11b are depressed, and change from the off state to the on state. In addition, the key pressing operation of the black key 11b is detected. The detection of the key release operation by the key switches 38w and 38b is used for the generation control of the musical tone signal.

  Next, the operation of the keyboard device according to the first embodiment configured as described above will be described. When the performer starts to press the white key 11w and the black key 11b, the white key 11w and the black key 11b start swinging around the swing axes Cw and Cb against the reaction force of the springs 34w and 34b, The front ends of the white key 11w and the black key 11b are displaced downward to disengage the engaging portions 11w3 and 11b3 from the upper limit stopper members 35w and 35b, and then the pressing portions 11w1 and 11b1 are the top portions of the reaction force generating members 21w and 21b. It contacts the rear end of the upper surface of 21w2, 21b2. When the white key 11w and the black key 11b are further pressed, the front end portions of the white key 11w and the black key 11b are displaced downward, and the dome portions of the reaction force generating members 21w and 21b are pressed by the pressing portions 11w1 and 11b1. 21w1, 21b1 starts to deform. Accordingly, the performer starts to feel the gradually increasing reaction force of the reaction force generating members 21w and 21b in addition to the reaction force by the springs 34w and 34b.

  When the white key 11w and the black key 11b are further pressed, the reaction force of the reaction force generating members 21w and 21b reaches a peak, and then the dome portions 21w1 and 21b1 start to buckle. Thereby, the performer feels a clear click feeling. Note that the key switches 38w and 38b change from the off state to the on state by being slightly delayed from the buckling and by pressing the protruding portions protruding from the lower surfaces of the white key 11w and the black key 11b. In response to the change of the key switches 38w and 38b to the on state, a tone signal generation circuit (not shown) starts to generate tone signals.

  Further, when the white key 11w and the black key 11b are pressed, the lower surfaces of the front ends of the white key 11w and the black key 11b come into contact with the lower limit stopper members 36w and 36b, and the swinging of the white key 11w and the black key 11b is finished. In this state, the elastic deformation of the reaction force generating members 21w and 21b is also finished. When the white key 11w and the black key 11b are released, the front ends of the white key 11w and the black key 11b are displaced upward by the reaction force of the reaction force generating members 21w and 21b and the springs 34w and 34b. In the process in which the front ends of the white key 11w and the black key 11b are displaced upward, the key switches 38w and 38b change from the on state to the off state, and the tone signal generation circuit (not shown) stops generating the tone signal. To control. Further, when the front end portions of the white key 11w and the black key 11b are displaced upward, the engaging portions 11w3 and 11b3 come into contact with the upper limit stopper members 35w and 35b, and the white key 11w and the black key 11b return to the key release state.

  In the keyboard device configured and operated as described above, the thickness of the base portion 21w3 (the length in the direction of the axis Yw) and the thickness of the base portion 21b3 (the length in the direction of the axis Yb). By making the difference, the reaction force generating member 21w (dome portion 21w1) and the reaction force generating member 21b (dome portion 21b1) are deformed when the white key 11w is pressed and when the black key 11b is pressed. The amount of movement of the white key 11w downward at the front end top surface and the amount of movement of the black key 11b below the front end top surface at the start, at the reaction force peak, and at the end of deformation were set to be substantially the same. Therefore, even if the white key 11w and the black key 11b have different structures, the pressing / releasing operation of the white key 11w and the pressing / releasing key of the black key 11b can be performed without a sense of incongruity.

  Then, by making the heights of the base portion 21w3 and the base portion 21b3 different from each other, the heights of the lower end surface of the dome portion 21w1 and the lower end surface of the dome portion 21b1 are made different, and then the dome portion 21w1 and the top portion. Since 21w2, the dome part 21w1 and the top part 21b2 have the same shape and size, the white key 11w and the black key 11b can obtain almost the same key touch feeling. In the first embodiment, the plurality of reaction force generating members 21w and the plurality of reaction force generating members 21b are integrally formed, and the integrally formed reaction force generating members 21w and 21b can be easily assembled. .

  In the above description, the difference in height between the lower end surface of the dome portion 21w1 for the white key 11w and the lower end surface of the dome portion 21b1 for the black key 11b has been described with reference to the upper surface of the support portion 31d. However, instead of this, the difference in height will be described using the intersections between the lower end surfaces of the dome portions 21w1 and 21b1 and the axial centers Yw and Yb. In the above case, as shown in FIGS. 3 and 16A, the axis Yw of the dome portion 21w1 of the reaction force generating member 21w for the white key 11w and the dome portion of the reaction force generating member 21b for the black key 11b. The axis center Yb of 21b1 is parallel. Therefore, in this case, the difference ΔL in the distance between the lower end surfaces of the dome portions 21w1 and 21b1 in the direction of the axial centers Yw and Yb is the intersection point Pw between the lower end surface of the dome portion 21w1 and the axial center Yw and the lower end surface of the dome portion 21b1. Can be defined as the distance in the direction of both axes Yw and Yb of the intersection Pb between the axis Yb and the axis Yb. Note that the difference ΔL in this case is also the difference in distance between the intersection point Pw between the lower end surface of the dome portion 21w1 and the axis Yw and the intersection point Pb ′ between the lower end surface of the dome portion 21b1 and the axis Yw. It can also be defined as a difference in distance between the intersection Pw ′ between the lower end surface of the dome portion 21w1 and the axis Yb and the intersection Pb between the lower end surface of the dome portion 21b1 and the axis Yb.

  However, as shown in FIG. 16 (B), the black key reaction force generating member 21b may be assembled to the white key reaction force generating member 21w in an inclined manner. Yw and Yb are not parallel, and it is difficult to define a difference in height between the lower end surfaces of the dome portions 21w1 and 21b1 by the above method. Therefore, in this specification, including the case where both the axial centers Yw and Yb are parallel, the dome is formed by using one of the axial center Yw of the dome portion 21w1 and the axial center Yb of the dome portion 21b1. The difference with the position of the both lower end surfaces of the part 21w1, 21b1 is defined. That is, the distance in the direction of the axis Yw between the intersection Pw between the lower end surface of the dome portion 21w1 and the axis Yw and the intersection Pb 'between the lower end surface of the dome portion 21b1 and the axis Yw is defined. Alternatively, the distance in the direction of the axis Yb between the intersection Pb between the lower end surface of the dome portion 21b1 and the axis Yb and the intersection Pw 'between the lower end surface of the dome portion 21w1 and the axis Yb is defined. Even in this case, in FIG. 16B, since the inclination with respect to the axis Yb with respect to the axis Yw is exaggerated, the lower end surface of the dome portion 21w1 substantially as shown in FIG. There is a distance in the direction of the axis Yw (or axis Yb) between the dome portion 21b1 and the lower end surface of the dome portion 21b1. Note that the positions of the lower end surfaces of the dome portions 21w1, 21b1 are the same in various embodiments described later.

  In the first embodiment, the dome portion 21w1 and the top portion 21w2, and the dome portion 21b1 and the top portion 21b2 have the same shape and size, but have slightly different shapes such as the inclination. Also good.

  In the first embodiment, the reaction force generating members 21w and 21b are fixed to the support portion 31d, and the reaction force generating members 21w and 21b are pressed by the pressing portions 11w1 and 11b1 of the white key 11w and the black key 11b. I made it. However, instead of this, the reaction force generating members 21w, 21b are fixed to the white key 11w and the black key 11b, and the pressing portion is located at a position facing the reaction force generating members 21w, 21b in the upper plate portion 31a of the key frame 31. The reaction force generating members 21w and 21b may be pressed by the pressing portion by swinging the white key 11w and the black key 11b. In this case, it is necessary to form the reaction force generating members 21w and 21b separately and fix the reaction force generating members 21w and 21b to the white key 11w and the black key 11b individually.

b. Second Embodiment Next, a plurality of reaction force generating members 21w for the white keys 11w and a plurality of reaction force generating members 21b for the black keys 11b are arranged in two rows at different positions in the front-rear direction. A keyboard device according to an embodiment will be described. FIG. 4 is a schematic side view of the keyboard device according to the second embodiment viewed from the right, and FIG. 5 is a schematic plan view of the keyboard device. FIG. 6 is an enlarged cross-sectional view of the reaction force generating member 21w for the white key 11w and the reaction force generating member 21b for the black key 11b as viewed along lines 6-6 in FIG.

  The plurality of reaction force generating members 21w are arranged along the left-right direction on the support portion 31d1 provided on the upper plate portion 31a of the key frame 31. The support portion 31d1 extends in the left-right direction at a position slightly lower than the upper plate portion 31a. The plurality of reaction force generating members 21w are integrally formed of an elastic body, and each has a dome portion 21w1, a top portion 21w2, and a base portion 21w3 similar to those in the first embodiment. The plurality of dome portions 21w1 and the top portion 21w2 are located below the pressing portions 11w1 of the plurality of white keys 11w. The base portion 21w3 is formed in a flat plate shape with the same thickness, and connects the plurality of dome portions 21w1.

  The plurality of reaction force generating members 21 b are arranged along the left-right direction on the support portion 31 d 2 provided on the upper plate portion 31 a of the key frame 31. The support portion 31d2 extends in the left-right direction at the same height position as the upper plate portion 31a behind the support portion 31d1. The plurality of reaction force generation members 21b are also integrally formed of an elastic body, and each have a dome portion 21b1, a top portion 21b2, and a base portion 21b3 similar to those in the first embodiment. The plurality of dome portions 21b1 and the top portion 21b2 are positioned below the pressing portions 11b1 of the plurality of black keys 11b. The pressing part 11b1 of the black key 11b is located behind the pressing part 11w1 of the white key 11w. The base portion 21b3 is formed in a flat plate shape with the same thickness, and connects the plurality of dome portions 21b1. In this case, the reaction force generating member 21w for the white key 11w and the reaction force generating member 21b for the black key 11b are configured independently, but have the same shape. In particular, the base portions 21w3 and 21b3 have the same thickness, and the dome portions 21w1 and 21b1 and the top portions 21w2 and 21b2 have the same shape.

  In the second embodiment, due to the difference in height between the support portions 31d1 and 31d2, the height of the top surface of the top portion 21w2 of the reaction force generating member 21w is the same as that of the top portion 21b2 of the reaction force generating member 21b. It becomes lower than the height. Similar to the case of the first embodiment, the difference in height between the reaction force generating member 21w (dome portion 21w1) and the case where the white key 11w is depressed and the case where the black key 11b is depressed is The amount of downward movement of the front surface of the front end of the white key 11w and the downward movement of the top surface of the front end of the black key 11b when the reaction force generating member 21b (dome portion 21b1) starts to deform, when the reaction force peaks, and when the deformation ends. The amount is set to be almost the same. Since other configurations are the same as those in the first embodiment, the same reference numerals are used and description thereof is omitted.

  In the keyboard device according to the second embodiment configured as described above, the player performs the same operation as the first embodiment in the key release operation of the white key 11w and the black key 11b. In the second embodiment, the white key 11w and the black key 11b have different structures for the same reason as in the case of the first embodiment by making the heights of the support portion 31d1 and the support portion 31d2 different. Even if they are different from each other, it is possible to perform the pressing and releasing operation of the white key 11w and the pressing and releasing operation of the black key 11b without any sense of incongruity, and to obtain almost the same key touch feeling between the white key 11w and the black key 11b. it can. Also in the second embodiment, the plurality of reaction force generating members 21w are integrally formed, the plurality of reaction force generating members 21b are also integrally formed, and the integrally formed reaction force generating members 21w and 21b can be simply formed. Can be assembled.

  In the second embodiment, the dome portion 21w1 and the top portion 21w2, and the dome portion 21b1 and the top portion 21b2 have the same shape and size, but slightly as in the case of the first embodiment. Different shapes may be used.

  In the second embodiment, the reaction force generating members 21w and 21b are fixed to the support portions 31d1 and 31d2, and the reaction force generating members 21w and 21b are pressed by the pressing portions 11w1 and 11b1 of the white key 11w and the black key 11b. I tried to do it. However, instead of this, the reaction force generating members 21w, 21b are fixed to the white key 11w and the black key 11b, and the pressing portion is located at a position facing the reaction force generating members 21w, 21b in the upper plate portion 31a of the key frame 31. The reaction force generating members 21w and 21b may be pressed by the pressing portion by swinging the white key 11w and the black key 11b. In this case as well, it is necessary to form the reaction force generating members 21w and 21b separately and fix the reaction force generating members 21w and 21b individually to the white key 11w and the black key 11b.

c. Third Embodiment Next, a third embodiment in which a plurality of reaction force generating members 21w for the white keys 11w and a plurality of reaction force generating members 21b for the black keys 11b are integrally formed according to the second embodiment. The keyboard device according to the embodiment will be described. FIG. 7 is a schematic side view of the keyboard device according to the third embodiment viewed from the right, and FIG. 8 is a schematic plan view of the keyboard device. FIG. 9 is an enlarged cross-sectional view of the reaction force generating members 21w and 21b for the white key 11w and the black key 11b as viewed along lines 9-9 in FIG.

  In the third embodiment, the plurality of reaction force generating members 21w and the plurality of reaction force generating members 21b of the second embodiment are integrally formed, and each of the reaction force generating members 21w and 21b is the first and second members. The dome portions 21w1 and 21b1, the top portions 21w2 and 21b2, and the base portions 21w3 and 21b3 are the same as those in the embodiment. In this case, the plurality of base portions 21w3 and 21b3 are configured such that their lower surfaces are continuously formed on a common horizontal plane, and the upper surface of the continuous base portion 21w3 and the continuous base portions 21b3. A step 21q is provided between the upper surface and the upper surface. The integrally formed reaction force generating members 21w and 21b are disposed on a support portion 31d provided on the upper plate portion 31a. Thereby, the height of the upper surface of the top portion 21w2 of the reaction force generating member 21w is made lower than the height of the upper surface of the top portion 21b2 of the reaction force generating member 21b. Similar to the first and second embodiments, the difference in height between the reaction force generating member 21w (dome portion) when the white key 11w is depressed and when the black key 11b is depressed. 21w1) and the amount of movement of the white key 11w below the front end top surface and the bottom of the front end top surface of the black key 11b at the start of deformation, at the reaction force peak, and at the end of deformation of the reaction force generating member 21b (dome portion 21b1) The amount of movement to is set to be almost the same. Since other configurations are the same as those in the first embodiment, the same reference numerals are used and description thereof is omitted.

  In the keyboard device according to the third embodiment configured as described above, the player performs the same operation as the first and second embodiments in the key release operation of the white key 11w and the black key 11b. In the third embodiment, the thicknesses of the base part 21w3 for the white key 11w and the base part 21b3 for the black key 11b, that is, the lengths in the directions of the axial centers Yw and Yb are made different. For the same reason as in the first and second embodiments, even if the white key 11w and the black key 11b have different structures, the white key 11w pressing and releasing key operation and the black key 11b pressing and releasing key operation are performed. The white key 11w and the black key 11b can obtain almost the same key touch feeling. In the third embodiment, the plurality of reaction force generating members 21w and the plurality of reaction force generating members 21b are integrally formed, and the integrally formed reaction force generating members 21w and 21b can be easily assembled.

  In the third embodiment, the dome portion 21w1 and the top portion 21w2, and the dome portion 21b1 and the top portion 21b2 have exactly the same shape and size, but the same as in the first and second embodiments. The shape may be slightly different.

  In the third embodiment, the step 21q is provided between the base portion 21w3 and the base portion 21b3. However, instead of the step 21q, as shown in FIG. 10, the base portion 21w3 and the base portion 21b3 are connected by the inclined surface 21r, and the lower end surface of the dome portion 21w1 and the lower end surface of the dome portion 21b1 You may make it vary the height of.

  In the third embodiment and its modification, the rear end of the dome portion 21w1 for the white key 11w (the right end of the dome portion 21w1 in FIG. 8) is the front end of the dome portion 21b1 for the black key 11b (see FIG. 8 is located on the front side (left side in FIG. 8) of the dome portion 21b1 on the left side. However, instead of this, the rear end of the dome portion 21w1 for the white key 11w may be positioned between the front end and the rear end of the dome portion 21b1 for the black key 11b. In other words, the dome portion 21w1 is located in front of the dome portion 21b1, but the dome portion 21w1 and the dome portion 21b1 may have a portion where they overlap each other in the front-rear direction.

d. Fourth Embodiment Next, the bottom surfaces of the base portions 21w3 and 21b3 of the plurality of integrally formed reaction force generating members 21w and 21b are inclined, and the support portion 31d provided on the upper plate portion 31a of the key frame 31 is also inclined. A keyboard device according to the fourth embodiment will be described. FIG. 11 is a schematic side view of the keyboard device according to the fourth embodiment viewed from the right, and FIG. 12 is a schematic plan view of the keyboard device. FIG. 13 is an enlarged cross-sectional view of the reaction force generating members 21w and 21b for the white key 11w and the black key 11b as viewed along lines 13-13 in FIG.

  In the fourth embodiment, the support portion 31d is inclined so as to be lower on the front side and higher on the rear side, and is formed integrally with the upper plate portion 31a. As with the second and third embodiments, the pressing portion 11w1 of the white key 11w and the pressing portion 11b1 of the black key 11b are provided in two rows with the pressing portion 11w1 on the front side and the pressing portion 11b1 on the rear side. The pressing portions 11w1 and 11b1 are both formed on a plane that is high on the front side and low on the rear side.

  The plurality of reaction force generating members 21w and the plurality of reaction force generating members 21b are integrally formed, and each of the reaction force generating members 21w and 21b has the same dome portions 21w1 and 21b1, top portion 21w2, as in the first to third embodiments. 21b2 and base portions 21w3 and 21b3. In this case, the plurality of base portions 21w3 and 21b3 are configured such that their lower surfaces are continuously formed by a common inclined plane, and the upper surfaces thereof are configured by a horizontal plane. A cylindrical groove 21w4 with a base 21w3 cut out is formed outside the outer peripheral surface of the dome portion 21w1, and a cylindrical groove 21b4 with a base 21b3 cut out is formed outside the outer peripheral surface of the dome portion 21b1. Has been. The radial widths of these grooves 21w4 and 21b4 are such that when the dome parts 21w1 and 21b1 are deformed by pressing from the upper surfaces of the top parts 21w2 and 21b2, the outer peripheral surfaces of the dome parts 21w1 and 21b1 are the inner circumferences of the grooves 21w4 and 21b4. It is set so as not to touch the surface.

  In this case, the height of the dome portions 21w1 and 21b1 is the height from the bottom surface of the grooves 21w4 and 21b4 to the upper surface of the dome portions 21w1 and 21b1. Then, by making the depth of the groove 21w4 deeper than the depth of the groove 21b4, the height of the dome portion 21w1 and the top portion 21w2 is made lower than the height of the dome portion 21b1 and the top portion 21b2. The dome portion 21w1 and the top portion 21w2, and the dome portion 21b1 and the top portion 21b2 are configured in the same shape, and the distance Lw from the lower end surface to the upper end surface of the dome portion 21w1 is from the lower end surface of the dome portion 21b1. It is equal to the distance Lb to the upper end surface. The difference in height between the dome portions 21w1 and 21b1 is similar to the case of the first to fourth embodiments described above, when the white key 11w is pressed and when the black key 11b is pressed. The downward movement amount of the white key 11w and the black key at the start of deformation, the peak of reaction force, and the end of deformation of the generating member 21w (dome portion 21w1) and the reaction force generating member 21b (dome portion 21b1) The amount of downward movement of the upper surface of the front end of 11b is set to be substantially the same. Since other configurations are the same as those in the first to third embodiments, the same reference numerals are used and description thereof is omitted.

  In the keyboard device according to the fourth embodiment configured as described above, the player performs the same operation as the first and second embodiments in the key release operation of the white key 11w and the black key 11b. In the fourth embodiment, the groove 21w4 and the groove 21b4 are made different in depth so that the white key 11w and the black key 11b are structured for the same reason as in the first to third embodiments. Even when the white key 11w is different, the white key 11w can be pressed and released and the black key 11b can be pressed and released without any discomfort, and the white key 11w and the black key 11b can obtain almost the same key touch feeling. Can do. In the fourth embodiment, the plurality of reaction force generating members 21w and the plurality of reaction force generating members 21b are integrally formed, and the bottom surfaces of the base portions 21w3 and 21b3 are continuously inclined. The integrally formed reaction force generating members 21w and 21b can be easily assembled to the inclined support portion 31d.

  In the fourth embodiment, the dome portion 21w1 and the top portion 21w2 and the dome portion 21b1 and the top portion 21b2 have the same shape and size, but the same as in the first to third embodiments. The shape may be slightly different.

  Moreover, in the said 4th Embodiment, the height of the dome part 21w1 and the top part 21w2 and the height of the dome part 21b1 and the top part 21b2 were varied by the difference in the depth of the grooves 21w4 and 21b4. However, without providing the grooves 21w4 and 21b4, as shown in FIG. 14, after the bottom surfaces of the base portions 21w3 and 21b4 are inclined, the top surface of the base portion 21w3 and the top surface of the base portion 21b3 You may make it provide the level | step difference 21q between these. This also makes the dome portion 21w1 and the top portion 21b2 have the same shape, and the dome portion 21w1 and the top portion 21b2 have the same height, and the dome portion 21b1 and the top portion 21b2 have the same height. Can be different. Further, instead of the step 21q, similarly to the modification of the third embodiment, the base portion 21w3 and the base portion 21b3 are connected by the inclined surface 21r, and the lower end surface of the dome portion 21w1 is connected. You may make it vary the height of the lower end surface of the dome part 21b1 (refer FIG. 10).

  In the fourth embodiment and its modification, the rear end of the dome portion 21w1 for the white key 11w (the right end of the dome portion 21w1 in FIG. 8) is the front end of the dome portion 21b1 for the black key 11b (see FIG. 12 is located on the front side (left side in FIG. 12) of the dome portion 21b1 on the left side. However, in this case as well, the rear end of the dome portion 21w1 for the white key 11w may be positioned between the front end and the rear end of the dome portion 21b1 for the black key 11b. In other words, the dome portion 21w1 is located in front of the dome portion 21b1, but the dome portion 21w1 and the dome portion 21b1 may have a portion where they overlap each other in the front-rear direction.

e. Fifth Embodiment Next, a fifth embodiment in which a rocking body that rocks in conjunction with the rocking of the white key 11w and the black key 11b presses the reaction force generating members 21w and 21b will be described. FIG. 15 shows a keyboard device according to the fifth embodiment. This keyboard device is provided with hammers 41w and 41b as the rocking bodies corresponding to the white key 11w and the black key 11b.

  The hammers 41w and 41b are swingably supported by hammer support members 42 corresponding to the white key 11w and the black key 11b, respectively. The hammer support member 42 extends downward from the lower surface of the upper plate portion 31a at an intermediate position in the front-rear direction of the white key 11w and the black key 11b. The hammers 41w and 41b include base portions 41w1 and 41b1, connecting rods 41w2 and 41b2, and mass bodies 41w3 and 41b3, respectively. The base portions 41w1 and 41b1 are supported by the hammer support member 42 so as to be swingable around the swing axes Cw1 and Cb1 at their intermediate portions, and swing the mass bodies 41w3 and 41b3 in the vertical direction. The front portions of the base portions 41w1 and 41b1 are provided with leg portions that are divided into two forks. Between the leg portions, extended portions 43w and 43b that extend vertically from the lower surfaces of the white key 11w and the black key 11b, respectively. The drive shafts 43w1 and 43b1 provided in are slidably penetrated. The extending portions 43w and 43b penetrate the through holes provided in the upper plate portion 31a so as to be displaceable in the vertical direction. Thereby, when the white key 11w and the black key 11b are pressed, the front ends of the base portions 41w1 and 41b1 are displaced downward. The connecting rods 41w2 and 41b2 extend in the front-rear direction and connect the base portions 41w1 and 41b1 and the mass bodies 41w3 and 41b3. The mass bodies 41w3 and 41b3 urge the front end sides of the hammers 41w and 41b upward due to their weights.

  Below the mass bodies 41w3 and 41b3, an upper limit stopper member 44 that restricts the downward movement of the mass bodies 41w3 and 41b3 is fixed to the frame FR. The upper limit stopper member 44 is also composed of a buffer member such as felt. Thus, in the key release state, the mass bodies 41w3 and 41b3 are positioned on the upper limit stopper member 44, and the upward displacement of the front end portions of the white key 11w and the black key 11b is restricted. Therefore, in the fifth embodiment, the upper limit stopper members 35w and 35b and the extending portions 11w2 and 11b2 of the first embodiment are not present.

  The reaction force generating members 21w and 21b are fixed to the lower surfaces of the support portions 31fw and 31fb provided on the upper plate portion 31a at positions facing the mass bodies 41w3 and 41b3. The upper surfaces of the mass bodies 41w3 and 41b3 constitute flat pressing portions 41w4 and 41b4, and the pressing portions 41w4 and 41b4 are in the key-released state and the lower surfaces of the top portions 21w2 and 21b2 of the reaction force generating members 21w and 21b (the first Corresponding to the top surface of the first to fourth embodiments). When the key is pressed, the pressing portions 41w4 and 41b4 are displaced upward and come into contact with the lower surfaces of the top portions 21w2 and 21b2 to press the reaction force generating members 21w and 21b, respectively. Also in this case, the reaction force generating members 21w and 21b are elastically deformed by the pressing, and are buckled and deformed after the reaction force reaches the peak. Further, since the hammers 41w and 41b apply a reaction force to the key pressing operation of the white key 11w and the black key 11b, the springs 34w and 34b of the first embodiment may exist, but this fifth It is omitted in the embodiment.

  Also in the fifth embodiment, since the amount of vertical movement of the mass bodies 41w3 and 41b3 differs between the white key 11w and the black key 11b, the reaction force generating members 21w and 21b are different from the case of the first embodiment. Similarly, the height positions of the dome portion 21w1 and the top portion 21w2 are made different from the height positions of the dome portion 21b1 and the top portion 21b2. The configuration and shape of the reaction force generating members 21w and 21b are the same as those in the first embodiment. Since other configurations are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted.

  In the fifth embodiment configured as described above, when the white key 11w and the black key 11b are pressed, the drive shafts 43w1 and 43b1 of the extending portions 43w and 43b are displaced downward, and the hammers 41w and 41b are It swings counterclockwise around Cw1 and Cb1. Then, the pressing portions 41w4 and 41b4 of the mass bodies 41w3 and 41b3 of the hammers 41w and 41b press the reaction force generating members 21w and 21b, and the reaction force generating members 21w and 21b are buckled after elastically deforming. When the key is further advanced, the reaction force generating members 21w and 21b are further elastically deformed, and the white key 11w and the black key 11b are pressed by the lower end stopper members 36w and 36b on the lower surfaces of the front ends. finish. At the time of the key depression, the hammer 41w, 41b and the reaction force generating members 21w, 21b both give the player a reaction force against the key depression.

  On the other hand, when the white key 11w and the black key 11b are released, the hammers 41w and 41b swing clockwise due to the weight of the mass bodies 41w3 and 41b3, and the front ends of the white key 11w and the black key 11b are displaced upward. To do. When the lower surfaces of the mass bodies 41w3 and 41b3 come into contact with the upper limit stopper member 44, the swinging of the white key 11w and the black key 11b stops, and the white key 11w and the black key 11b return to the original key release state. .

  Even in the keyboard device according to the fifth embodiment configured and operated in this manner, even if the white key 11w and the black key 11b have different structures for the same reason as in the first embodiment, the white key The 11w pressing / releasing key operation and the black key 11b pressing / releasing key operation can be performed without any sense of incongruity, and the white key 11w and the black key 11b can provide almost the same key touch feeling. Further, since the plurality of reaction force generation members 21w and 21b are integrally formed, the reaction force generation members 21w and 21b can be easily assembled.

  Also in the fifth embodiment, similarly to the second to fourth embodiments and the modifications thereof, a plurality of reaction force generating members 21w for the white key 11w and a plurality of reaction force for the black key 11w are used. You may make it arrange | position the force generation member 21b along the left-right direction in 2 rows of front and back. Also in this case, the plurality of reaction force generating members 21w are integrally formed and the plurality of reaction force generating members 21b are integrally formed, or the plurality of reaction force generating members 21w and the plurality of reaction force generating members 21b are integrally formed. Or better.

  Further, in the keyboard device having the hammers 41w and 41b as described above, the reaction force generating members 21w and 21b are replaced with the mass bodies 41w3 and 41b3 of the hammers 41w and 41b, as in the modified example of the first and second embodiments. A pressing portion for pressing the upper surfaces of the top portions 21w2 and 21b2 of the reaction force generating members 21w and 21b is provided on the lower surface of the upper plate portion 31a of the key frame 31 facing the hammers 41w and 41b. Also good.

f. Other Modifications In the first to fifth embodiments and the modifications thereof, the height of the lower end of the dome portion 21w1 of the reaction force generation member 21w for the white key 11w is set to the reaction force generation for the black key 11b. The example which made it lower than the height of the lower end of the dome part 21w1 of the member 21b was demonstrated. However, depending on the structure of the white key 11w and the black key 11b, the height of the lower end of the dome portion 21w1 of the reaction force generating member 21w for the white key 11w is set to the height of the dome portion 21w1 of the reaction force generating member 21b for the black key 11b. It may be higher than the height of the lower end.

  Moreover, in the said 1st thru | or 5th embodiment and those modifications, the dome part 21w1 and top part 21w2 of the reaction force generation member 21w for the white key 11w, and the reaction force generation member 21b for the black key 11b are used. Although the shape and size of the dome portion 21b1 and the top portion 21b2 are the same, the top portions 21w2 and 21b2 are hardly deformed when pressed. Therefore, the shape and size of the top portion 21w2 and the top portion 21b2, particularly from the upper surface to the lower surface The lengths in the directions of the axes Yw and Yb may be different.

  In the first to fifth embodiments and their modifications, the reaction force generating members 21w and 21b are provided independently of the key switches 38w and 38b. However, instead of this, the key switches 38w, 38b may be configured in the same manner as the reaction force generating members 21w, 21b, and the key switches 38w, 38b may be used as the reaction force generating members. In this case, the dome portions 21w1 and 21b1 have a two-stage configuration including an inner portion and an outer portion, and a cylindrical switch portion with a small amount of deformation is provided between the inner portion and the outer portion. Then, a reaction force that increases against the key press is generated by the deformation of the outer portion, and the contact provided on the substrate is opened and closed by the switch portion, and the reaction force against the key press accompanied by buckling deformation by the deformation of the inner portion. Should be generated.

  Furthermore, in the first to fifth embodiments and the modifications thereof, the example in which the white key 11w and the black key 11b are swung around the rotation axis has been described. However, the present invention is not limited to this, and by providing a plate-like thin portion at the rear ends of the white key 11w and the black key 11b, and supporting the rear end of the thin portion with a support member, the white key 11w and the A hinge-type swing fulcrum that swings the black key 11b may be used. However, in this case, the above-described peristaltic axes Cw and Cb change slightly with the perturbation of the white key 11 and the black key 11b, that is, the positions of the peristaltic axes Cw and Cb vary with time.

11w ... White key, 11b ... Black key, 11w1, 11b1 ... Pressing part, 21w, 21b ... Reaction force generating member, 21w1, 21b1 ... Dome part, 21w2, 21b2 ... Top part, 21w3, 21b3 ... Base part, 21w4 21b4 ... groove, 21p, 21q ... step, 21r ... inclined surface, 31 ... key frame, 31d, 31d1, 31d2 ... support, 32 ... key support, 34w, 34b ... spring, 41w, 41b ... hammer, 41w4 41b4 ... Pressing part, Cw, Cb, Cw1, Cb1 ... Oscillating shaft, Yw, Yb ... Axis, Pb, Pb ', Pw, Pw' ... Intersection

Claims (2)

A plurality of keys consisting of a white key and a black key that swing around the swing axis and displace the front end up and down;
A plurality of reaction force generating members provided corresponding to the plurality of keys, each of which is constituted by an elastic body, and is pressed when the plurality of keys are pressed, to the key pressing operation of the plurality of keys; In the keyboard device of an electronic musical instrument provided with a reaction force generating member that generates a reaction force,
The plurality of reaction force generating members are formed in a thin dome-like shape and elastically deformed by pressing, and continuously downward over the entire circumference of the lower end of the dome portion, and more than the lower end surface of the dome portion. The dome portion is integrally formed with a thick wall so as to project outward, and each has a base portion that supports the dome portion,
A step or slope is provided between the upper surface of the white key base portion and the black key base portion, and the white key base portion and the black key base portion are provided. A keyboard device for an electronic musical instrument, characterized by having different shapes. 2. The keyboard device for an electronic musical instrument according to claim 1 , wherein the dome portion for the white key and the dome portion for the black key have the same shape and size.

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