JP2011248046A - Keyboard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simply structured keyboard device enabling the performer to feel a touch of keys resembling the key touch feeling of an acoustic piano so as to perform well without discomfort.SOLUTION: A keyboard device comprises click feel providing members 18 that include: protrusions 20 disposed on each key 2; and an elastic member that is provided on a keyboard chassis 1 and allows the protrusions 20 to go over by coming into contact from an upper part and subjecting it to flex deformation centering on a first fulcrum 27, when touching operation of the key 2 is performed. This elastic member has a second fulcrum 28 which supports the protrusions 20 having went over this elastic member and coming into contact therewith from underneath, and the first fulcrum 27 is disposed in a position whose length L1 from a tip 25a of the elastic member is shorter than a length L to the second fulcrum 28.

Description

  The present invention relates to a keyboard device for an electronic keyboard instrument such as an electronic piano or an electronic organ.

  Conventionally, in an electronic keyboard instrument, as described in Patent Document 1, in order to obtain a key touch feeling similar to the key touch feeling of an acoustic piano, the key load is drastically reduced at the time of a key pressing operation, 2. Description of the Related Art A structure having a click feeling imparting member that imparts a let-off effect as if a load is lost is known.

Japanese Patent Laid-Open No. 06-318077

  This type of electronic keyboard instrument is provided with a hammer member that rotates in the vertical direction in response to a key pressing operation to apply an action load to the key, and when this hammer member rotates, the click feeling imparting member is a hammer member. After the key load is increased, the key load is abruptly reduced to give a click feeling as if the key load is lost, thereby providing a let-off effect to the key.

  In this case, the click feeling imparting member includes a roller with which the hammer member abuts from the vertical direction when the key is pressed and the hammer member rotates in the vertical direction, and the roller member that supports the roller rotatably to support the vertical direction of the hammer member. A leaf spring that is elastically deformed in a contact / separation direction orthogonal to the hammer, when the key is pressed and the hammer member rotates, the hammer member abuts on the roller to increase the key load, and the hammer member When the roller is overcome against the spring force, the key load is sharply reduced to give the key a click feeling that the key load is released.

  However, in such a conventional electronic keyboard musical instrument, the leaf spring that rotatably supports the roller with which the hammer member abuts in the vertical direction is in the contact / separation direction perpendicular to the vertical direction of the hammer member, that is, the longitudinal direction of the hammer member. Due to elastic deformation, the hammer member comes into contact with the roller from below when the key is pressed and the hammer member comes into contact with the roller from above to get over the roller, and when the hammer member that has gone over the roller returns to the initial position. In any case, the load is applied to the hammer member by the spring force of the leaf spring.

  For this reason, when the hammer member comes into contact with the roller from above by the key pressing operation and gets over the roller, the key load is increased and then suddenly lightened to give a feeling of clicking as if the key load is released. Even when the hammer member that has passed the roller returns to the initial position, the hammer member abuts the roller from below, so that the load is applied to the hammer member by the spring force of the leaf spring, and the click of the sense that the key load is released A feeling occurs in the key. For this reason, the problem is that not only a key touch feeling similar to the key touch feeling of an acoustic piano that does not cause a click feeling when the key is released can be obtained, but also the player feels uncomfortable and cannot perform well. There is.

  A problem to be solved by the present invention is to provide a keyboard device that has a simple structure, can obtain a key touch feeling that approximates the key touch feeling of an acoustic piano, and allows a performer to perform well without a sense of incongruity. That is.

In order to solve the above problems, the present invention includes the following components.
The invention according to claim 1 is a keyboard chassis, a key provided rotatably on the keyboard chassis in a vertical direction, and a click feeling imparting member that imparts a click feeling to the key when the key is depressed. The click feeling imparting member is provided on the key chassis so as to protrude in the front-rear direction of the key, and the keyboard chassis is provided with the protrusion when the key is pressed. And an elastic member that the protrusion protrudes by contacting and deforming from above, and the elastic member is supported when the key is pressed and the protrusion comes into contact from above. A fulcrum and a second fulcrum that is supported when the protrusion over the elastic member abuts from below; the first fulcrum is a length from the tip of the elastic member abutting the protrusion Of the elastic member It is a keyboard apparatus characterized by that the serial tip is disposed at a position shorter than the length from the second fulcrum.

  The invention according to claim 2 is characterized in that a groove portion is provided along a direction orthogonal to the front-rear direction of the key at the location of the elastic member located at the second fulcrum. It is a keyboard apparatus of description.

  The invention described in claim 3 is provided with a deformation adjusting plate that is disposed on the lower surface of the elastic member and adjusts the length from the tip of the elastic member to the first fulcrum. The keyboard device according to claim 1 or claim 2.

  The invention according to claim 4 is a state in which the deformation adjusting plate is such that the length from the tip of the elastic member to the first fulcrum is short on the low frequency range side and gradually becomes longer toward the high frequency range side. The keyboard device according to claim 3, wherein the keyboard device is provided.

  According to the present invention, when the projected portion of the depressed key is brought into contact with the elastic member of the keyboard chassis from above, and the elastic member is bent and deformed, the repulsive force by the elastic member is strengthened by the first fulcrum. This makes it possible to increase the key load and strongly give the key a click feeling that the key load is lost.

  When the depressed key returns to the initial position, the protrusion of the key comes into contact with the elastic member of the keyboard chassis from below, and when the elastic member is bent and deformed, the elastic member is moved by the second fulcrum. Thus, the repulsive force due to can be weakened, and thereby the key load can be reduced, and the key can be hardly given a click feeling as if the key load is lost. Therefore, with a simple structure, it is possible to obtain a key touch feeling that approximates the key touch feeling of an acoustic piano, and the performer can perform well without feeling uncomfortable.

In Embodiment 1 which applied this invention to the electronic keyboard musical instrument, it is sectional drawing which showed the initial state in which the key is not depressed. FIG. 2 is an enlarged cross-sectional view of a main part showing a state in which a key protrusion is positioned above an elastic member on the keyboard chassis in the electronic keyboard instrument shown in FIG. 1. FIG. 2 is a cross-sectional view showing a state in which the key is pressed and a protrusion comes into contact with an elastic member from above and is bent and deformed in the electronic keyboard instrument shown in FIG. 1. FIG. 4 is an enlarged cross-sectional view of a main part of the electronic keyboard instrument shown in FIG. 3, showing a state in which a key protrusion pushes an elastic member to bend and deform it. FIG. 4 is a cross-sectional view showing a state in which the key is further pressed and the protrusions get over the elastic member to give a click feeling to the key in the electronic keyboard instrument shown in FIG. 3. In the electronic keyboard instrument shown in FIG. 5, an enlarged cross-sectional view of the main part showing a state in which the elastic member has elastically returned to its original position when the key protrusion has passed over the elastic member to give the key a click feeling. FIG. FIG. 6 is a cross-sectional view showing a state where the key returns to the initial position in the electronic keyboard instrument shown in FIG. 5. FIG. 8 is an enlarged cross-sectional view of a main part of the electronic keyboard instrument shown in FIG. 7, showing a state in which a protruding portion of the key flexes and deforms an elastic member from the lower side toward the upper side to slip through. It is the figure which showed the characteristic of the key load at the time of the key pressing of the electronic keyboard musical instrument shown in FIGS. 1-8, and a key release, and a key stroke. In Embodiment 2 which applied this invention to the electronic keyboard musical instrument, it is an expanded sectional view of the principal part which showed the click feeling provision member. It is the expansion perspective view which decomposed | disassembled and showed the principal part of the click feeling provision member shown by FIG. FIG. 10 shows a low frequency range and a high frequency range in the click feeling imparting member shown in FIG. 10, (a) is an enlarged cross-sectional view of the main part showing the click feeling imparting member located in the low frequency range, and (b) is in the high frequency range. It is an expanded sectional view of the important section showing the click feeling grant member located.

(Embodiment 1)
A first embodiment in which the present invention is applied to an electronic keyboard instrument will be described below with reference to FIGS.
As shown in FIG. 1, the electronic keyboard instrument includes a keyboard chassis 1 that also serves as a lower case of a musical instrument case. A plurality of keys 2 are attached to the upper portion of the keyboard chassis 1 so as to be rotatable in the vertical direction in a state where the keys 2 are arranged in parallel in the musical scale order.

  The plurality of keys 2 includes a white key and a black key. However, the white key will be described in the first embodiment. As shown in FIG. 1, a thin bent portion 3 that is a rotation fulcrum is provided at each rear end portion (left end portion in FIG. 1) of these keys 2. The bent portion 3 is connected to a common connecting portion 4 that is continuous along the arrangement direction of the keys 2. As shown in FIG. 1, the common connecting portion 4 is attached to a key support portion 5 provided at the upper rear end (upper left end in FIG. 1) of the keyboard chassis 1 by screws 5 a.

  That is, as shown in FIG. 1, the common connecting portion 4 has a common connecting portion 4 for white keys and a common connecting portion 4 for black keys, and in a state in which these are superposed on each other, 5 is attached by screws 5a. As a result, as shown in FIGS. 3 and 5, when the key 2 is depressed, the bending portion 3 that is the rotation fulcrum is elastically deformed in the vertical direction. It is comprised so that it may rotate.

  Further, as shown in FIG. 1, a key guide portion 6 of the keyboard chassis 1 is inserted into the front side of the key 2 (inside of the right side in FIG. 1). As a result, the key 2 is configured such that when the key is pressed, the key guide portion 6 slides relatively up and down in the key 2 so that the key 2 does not swing sideways.

  Further, as shown in FIGS. 1 and 2, the key 2 is provided with a position restricting portion 7 for restricting the vertical position of the key 2 at a substantially intermediate portion so as to protrude downward. The position restricting portion 7 is provided with a hook portion 7a projecting rearward (left side in FIG. 2) at the lower rear end thereof, and the hook portion 7a is in an opening portion 8a provided in the rising portion 8 of the keyboard chassis 1. It is configured to move up and down in the inserted state.

  Thereby, as shown in FIGS. 5 and 6, when the key 2 is pushed down, the position restricting portion 7 is configured such that the lower end of the hook portion 7a of the position restricting portion 7 is the opening 8a in the rising portion 8 of the keyboard chassis 1. The lower limit position of the key 2 is regulated by abutting on a lower limit stopper 9 such as a felt provided at the bottom of the key 2 from above.

  Further, as shown in FIGS. 1 and 2, the position restricting portion 7 is configured so that the upper end of the hook portion 7 a of the position restricting portion 7 rises from the keyboard chassis 1 when the depressed key 2 returns to the initial position. The upper limit position of the key 2 is regulated by coming into contact with the upper limit stopper 10 such as felt provided above the opening 8a in the portion 8 from below.

  Further, as shown in FIGS. 1 and 2, the switch member 11 is positioned below the plurality of keys 2 at the upper part of the keyboard chassis 1 that is located approximately in the middle in the front-rear direction (left-right direction in FIG. 1). Is provided. The switch member 11 includes a switch board 12 mounted on the keyboard chassis 1 and a switch part 14 provided on the switch board 12 and pressed by the switch pressing part 13 of the key 2.

  As shown in FIGS. 1 and 2, the switch substrate 12 is formed in a band plate shape that is continuous along the arrangement direction of the keys 2. The switch board 12 is mounted on the keyboard chassis 1 by a board support part 15 that is provided between the key support part 5 at the rear end of the keyboard chassis 1 and the rising part 8 at the intermediate part. Yes. Moreover, the switch part 14 is provided with the rubber sheet 16 arrange | positioned on the switch board | substrate 12, as shown to FIG. 1 and FIG. The rubber sheet 16 is made of an elastic elastomer such as silicone rubber, and is formed in an elongated strip shape that is continuous along the arrangement direction of the keys 2.

  In this case, as shown in FIGS. 1 and 2, the rubber sheet 16 is formed with dome-shaped bulging portions 17 at equal intervals in a state corresponding to the switch pressing portions 13 of the plurality of keys 2. ing. As shown in FIGS. 1 and 2, the dome-shaped bulging portion 17 pushes up the switch pressing portion 13 of the key 2 by its repulsive force (elastic force) and switches the key 2 against the repulsive force. When pressed by the pressing portion 13, as shown in FIGS. 3, 5, and 7, it is configured to be elastically deformed.

  In this case, in the dome-shaped bulging portion 17, although not shown, a pair of movable contacts that come into contact with and separate from a pair of fixed contacts provided on the upper surface of the switch substrate 12 are provided. Thereby, as shown in FIG. 5, when the dome-shaped bulging portion 17 is pressed and elastically deformed by the switch pressing portion 13 of the key 2, the switch portion 14 switches the pair of movable contacts in the bulging portion 17 to the switch. A pair of fixed contacts of the substrate 12 are sequentially contacted to output a sound generation signal.

  Incidentally, as shown in FIGS. 1 and 2, the electronic keyboard instrument includes a click feeling imparting member 18 that imparts a click feeling to the key 2 during a key pressing operation. The click feeling imparting member 18 is provided on the position restricting portion 7 of the key 2 so as to protrude forward (right side in FIG. 2), and on the keyboard chassis 1 via the base member 22. And an elastic member 21. As shown in FIG. 2, the protrusion 20 is formed in a substantially triangular shape, and is provided on the front lower portion (lower right portion in FIG. 2) of the position restricting portion 7 so as to protrude toward the front side.

  That is, as for this projection part 20, the lower end surface is formed in the 1st inclination part 20a, and the upper side is formed in the 2nd inclination part 20b. In this case, the first inclined surface 20a is formed as an inclined surface that is inclined forward (upward to the right in FIG. 2) at a gentle angle (for example, about 30 degrees) with respect to the horizontal direction. The 2nd inclined surface 20b is formed in the inclined surface which inclines at a steep angle (for example, about 60 degree | times) at the front fall (right downward in FIG. 2) with respect to a horizontal direction.

  As shown in FIG. 2, the elastic member 21 is attached to the base member 22 provided on the keyboard chassis 1 by screws 23, and as shown in FIG. 2 and FIG. It is configured. In this case, the base member 22 is formed in an elongated plate shape that continues along the direction in which the keys 2 are arranged. Further, the base member 22 is formed with a height sufficiently higher than the thickness of the lower limit stopper portion 9.

  The elastic member 21 is made of a synthetic resin having flexibility such as silicone rubber or elastomer, or a thin metal plate that can be flexibly deformed, and is disposed on the base member 22 by screws 23 as shown in FIG. A fixed portion 24 to be fixed and a plurality of elastic pieces 25 projecting toward the rear side (left side in FIG. 2) of the key 2 in a state corresponding to each key 2 are provided on the fixed portion 24. That is, as shown in FIG. 2, the elastic member 21 has a plurality of elastic pieces 25 at the rear end portion (left end portion in FIG. 2) of the fixed portion 24, respectively, toward the rear side (left side in FIG. 2) of the key 2. The entire structure is formed in a comb-like shape.

  In this case, as shown in FIG. 2, a holding plate 26 is disposed on the fixing portion 24, and the fixing portion 24 is fixed on the base member 22 by a screw 23 via the holding plate 26. The presser plate 26 has a band plate shape that is continuous along the arrangement direction of the keys 2, and is formed to have approximately the same size as the fixing portion 24 of the elastic member 21. Thereby, the presser plate 26 is disposed on the fixing portion 24 in a state where the rear end portion (the left end portion in FIG. 2) located on the rear side of the key 2 and the rear end portion of the fixing portion 24 substantially coincide with each other. The fixing portion 24 is configured to be pressed.

  Further, as shown in FIG. 2, the plurality of elastic pieces 25 protrude from the base member 22 toward the rear side (left side in FIG. 2) of the key 2, and the protruding tip end portion 25 a is pressed. In the initial state, the key 2 is arranged so as to be positioned below the protrusion 20 provided on the position restricting portion 7 of the key 2. As a result, as shown in FIGS. 4 and 8, the elastic piece 25 is bent and deformed in the vertical direction by the protrusion 20 of the position restricting portion 7 of the key 2 coming into contact with the tip 25a from the vertical direction. The protrusion 20 is configured to get over the tip 25a of the elastic piece 25.

  In this case, as shown in FIG. 4, the elastic piece 25 includes a first fulcrum 27 that is supported when the key 2 is pressed and the protrusion 7 of the position restricting portion 7 comes into contact with the upper side, as shown in FIG. 8. As shown, it has a second fulcrum 28 that is supported when the protrusion 20 of the position restricting portion 7 abuts from below. As shown in FIGS. 2 and 4, the first fulcrum 27 is located at the rear end portion (left end portion in FIG. 4) on the upper surface of the base member 22. As shown in FIGS. 2 and 8, the second fulcrum 28 is a boundary portion between the elastic piece 25 and the fixing portion 24, that is, a front portion corresponding to the rear end portion of the fixing portion 24. Located in the front portion corresponding to the end.

  That is, as shown in FIG. 2, the first fulcrum 27 is a length (L1) from the front end 25a of the elastic piece 25 with which the protrusion 20 abuts to the rear end (left end in FIG. 2) of the base member 22. Thus, the elastic piece 25 is installed at a position corresponding to a length (L1≈ (1/2) L <L) that is substantially half the length (L) of the elastic piece 25. Further, the second fulcrum 28 is a length (L) from the front end portion 25a of the elastic piece 25 with which the protrusion 20 abuts to the rear end portion (left end portion in FIG. 2) of the holding plate 26, that is, the length of the elastic piece 25. It is installed at a position corresponding to the same length as the length (L).

  For this reason, as shown in FIG. 2, the first fulcrum 27 has a length (L1) from the tip 25a of the elastic piece 25 to the rear end (left end in FIG. 2) of the base member 22 as the second fulcrum. 28 is shorter than the length (L) from the front end portion 25a of the elastic piece 25 to the rear end portion (left end portion in FIG. 2) of the presser plate 26, and is approximately half the length (L) (L1). It is installed at a position corresponding to ≈ (1/2) L <L).

  As a result, as shown in FIGS. 3 and 4, the elastic piece 25 is supported by the first fulcrum 27 when the protrusion 20 of the position restricting portion 7 abuts from above when the key 2 is pressed. In this state, the key 2 is configured to bend and deform downward and to apply a key load to the key 2. In this case, the length (L1) from the tip 25a to the first fulcrum 27 of the elastic piece 25 is about half the length (L) of the elastic piece 25 (L1≈ (1/2) L < Since the elastic piece 25 has a strong repulsive force, the key load applied to the key 2 is increased.

  Therefore, as shown in FIGS. 2 and 4, the elastic piece 25 is bent downward by the key 2 being pushed down by the projection 20 of the position restricting portion 7 as the key 2 is pressed. As shown in FIGS. 5 and 6, when the protrusion 20 gets over the tip 25 a of the elastic piece 25, the key load applied to the key 2 is drastically reduced and the key load is suddenly released. A click feeling is imparted to the key 2 so as to elastically return to the original state.

  This elastic piece 25 is shown in FIGS. 7 and 8 when returning to the initial position after the key 2 is pressed and the projection 20 of the position restricting portion 7 has climbed over the tip 25a of the elastic piece 25. As shown, when the protrusion 20 abuts from below, it is configured to bend and deform toward the upper side while being supported by the second fulcrum 28.

  In this case, as shown in FIG. 2, the elastic piece 25 has a length (L) from the tip 25a to the second fulcrum 28 at a position substantially corresponding to the length (L) of the elastic piece 25. Since it is installed, the repulsive force of the elastic piece 25 is weaker than that when bending and deforming around the first fulcrum 27, and the key load applied to the key 2 is significantly reduced. As a result, as shown in FIG. 8, the elastic piece 25 causes the protrusion 20 to lightly move over the tip 25 a of the elastic piece 25 from below, and elastically return to the original state, thereby returning the key 2 to the initial position. It is configured as follows.

  Further, as shown in FIG. 2, the elastic piece 25 corresponds to the second fulcrum 28 in a direction in which the notch groove 29 is orthogonal to the front-rear direction of the key 2, that is, the rear end portion of the fixing portion 24 (see FIG. 2 is provided along the left end). For this reason, as shown in FIGS. 7 and 8, the elastic piece 25 is a second member when the projection 20 provided on the position restricting portion 7 of the key 2 comes into contact with the lower side and is bent and deformed upward. The notch groove 29 at a position corresponding to the fulcrum 28 further reduces the repulsive force of the elastic piece 25, and the elastic piece 25 is bent and deformed with a light force, so that the key load is hardly applied to the key 2. ing.

Next, the operation of this electronic keyboard instrument will be described.
In the initial state where the key 2 is not depressed, the key 2 is pushed upward by the elastic restoring force of the bent portion 3 provided at the rear end portion of the key 2 as shown in FIGS. The switch pressing portion 13 of the key 2 is pushed up by the repulsive force (elastic force) of the dome-shaped bulging portion 17 in the switch portion 14 of the switch member 11.

  Thereby, as shown in FIGS. 1 and 2, the key 2 is provided with the upper end of the hook portion 7 a provided in the position restricting portion 7 of the key 2 above the opening 8 a in the rising portion 8 of the keyboard chassis 1. The key 2 is restricted to the upper limit position by contacting the upper limit stopper 10 from below. In this state, as shown in FIG. 2, the first inclined surface 21 a at the lower end of the protrusion 21 of the position restricting portion 7 of the key 2 is positioned above the tip 25 a of the elastic piece 25 in the elastic member 21. Yes.

  In this state, when the key 2 is depressed, first, the key 2 rotates clockwise in FIG. 1 around the bending portion 3 that is the rotation fulcrum, and the switch pressing portion 13 of the key 2 is the dome of the switch portion 14. The bulging portion 17 having a shape is pressed and elastically deformed. At this time, due to the elastic deformation of the bent portion 3 and the elastic deformation of the bulging portion 17 of the switch portion 14, the key load increases suddenly as shown by the curved portion A in FIG. When the key 2 is further pushed down and the switch pressing portion 13 of the key 2 further presses the bulging portion 17 of the switch portion 14, the bulging portion 17 is suddenly elastically deformed as shown in FIGS. Therefore, as shown in the curved part B of FIG. 9, the key load is slightly reduced.

  Thereafter, when the key 2 is further pushed down, the switch pressing portion 13 of the key 2 further presses the bulging portion 17 of the switch portion 14, and the movable contact in the bulging portion 17 contacts the fixed contact of the switch substrate 12. Therefore, as shown by the curved part C in FIG. 9, the key load becomes heavy again. As shown in FIGS. 3 and 4, the first inclined surface 20 a of the protrusion 20 in the position restricting portion 7 of the key 2 contacts the elastic piece 25 of the elastic member 21 arranged on the keyboard chassis 1 from above. Since the elastic piece 25 is pressed down in contact, the elastic piece 25 is bent and deformed around the first fulcrum 27.

  At this time, the length (L1) from the distal end portion 25a of the elastic piece 25 to the first fulcrum 27 is about half the length (L) of the elastic piece 25 (L1≈ (1/2) L <L). Therefore, the repulsive force of the elastic piece 25 is strong, and the key load applied to the key 2 increases suddenly as shown by the curved part D in FIG. As shown in FIGS. 5 and 6, when the first inclined surface 20 a of the protrusion 20 in the position restricting portion 7 of the key 2 gets over the elastic piece 25 of the elastic member 21, the elastic piece 25 repels the key 2. Since the load due to the force is eliminated, the key load is drastically reduced as shown by the curved part E in FIG. 9, and a click feeling that the key load is released is given to the key 2.

  At this time, the elastic piece 25 is elastically restored, and the distal end portion 25a of the elastic piece 25 does not come into contact with the second inclined surface 20b of the protrusion 20 in the position restricting portion 7 of the key 2, and thus the first inclined surface 20a. Move upward to return to the original state. In this state, when the key 2 is further pushed down, the lower end of the hook portion 7a provided in the position restricting portion 7 of the key 2 is in contact with the lower limit stopper 9 provided in the lower portion of the opening portion 8a in the rising portion 8 of the keyboard chassis 1. By abutting from the upper side, the key 2 is restricted to the lower limit position. For this reason, as shown in the curved part F of FIG. 9, the key load increases suddenly again.

  On the other hand, when the depressed key 2 returns to the initial position, the key 2 is moved upward by the elastic return force of the bent portion 3 provided at the rear end of the key 2 as shown in FIGS. And is pushed up by the repulsive force (elastic return force) of the dome-shaped bulging portion 17 in the switch portion 14 of the switch member 11. For this reason, as shown in the curved part G of FIG.

  Thereafter, as shown in FIGS. 7 and 8, the second inclined surface 20 b of the protrusion 20 in the position restricting portion 7 of the key 2 is the tip of the elastic piece 25 of the elastic member 21 disposed on the keyboard chassis 1. Since the elastic piece 25 is pushed up by coming into contact with 25a from below, the elastic piece 25 is bent and deformed around the second fulcrum 28. At this time, the length (L) from the distal end portion 25a of the elastic piece 25 to the second fulcrum 28 is substantially the same as the length (L) of the elastic piece 25, and the first end portion 25a of the elastic piece 25 is Since it is longer than the length (L1) to the fulcrum 27, the repulsive force of the elastic piece 25 is weak.

  At this time, since the notch groove 29 is provided at the location of the elastic piece 25 corresponding to the second fulcrum 28, the notch groove 29 also weakens the repulsive force of the elastic piece 25, and the key 2 Almost no key load is applied. For this reason, the elastic piece 25 gives the key 2 a slight click feeling as if the key load is lost, and the key load applied to the key 2 becomes slightly heavy as shown by the curved portion H in FIG.

  7 and 8, when the second inclined surface 20b of the protrusion 20 in the position restricting portion 7 of the key 2 gets over the tip 25a of the elastic piece 25 of the elastic member 21, the elasticity against the key 2 is reached. Since the load due to the repulsive force of the piece 25 is eliminated, the key load is slightly reduced as shown by the curved part I in FIG. 9, and the protrusion 20 passes through the tip 25a of the elastic piece 25 and moves upward. Thereafter, the bulging portion 17 of the switch portion 14 pushes up the switch pressing portion 13 of the key 2 and elastically returns to the original dome shape, so that the key load is slightly increased as shown by the curved portion J in FIG. It will lighten later.

  Then, the key 2 is pushed upward by the elastic restoring force of the bending portion 3 which is the rotation fulcrum of the key 2, and the switch pressing portion 13 of the key 2 is a dome-shaped bulging portion 17 in the switch portion 14 of the switch member 11. It is pushed up by the repulsive force (elastic return force). For this reason, as shown by the curve K in FIG. 9, the key load is suddenly reduced, and the key 2 returns to the initial position as shown in FIGS.

  As described above, according to the electronic keyboard instrument, the click feeling imparting member 18 that imparts a click feeling to the key 2 when the key 2 is depressed is provided on the projection 2 provided on the key 2 and the keyboard chassis 1. When the key 2 is depressed, the projection 20 abuts from above and is deformed by bending, whereby the projection 20 is provided with an elastic member 21, which is provided with the first fulcrum 27 and the first fulcrum 27. The first fulcrum 27 has a length (L1) from the distal end portion 25a of the elastic member 21 with which the protrusion 20 abuts, and the length from the distal end portion 25a of the elastic member 21 to the second fulcrum 28. Since it is installed at a position (L1 <L) shorter than (L), it is possible to obtain a key touch feeling similar to that of an acoustic piano with a simple structure.

  That is, in this electronic keyboard instrument, the click feeling imparting member 18 includes a protrusion 20 provided on the key 2 and an elastic member 21 provided on the keyboard chassis 1 via the base member 22, and the elastic member 21. However, a first fulcrum 27 that is supported when the key 20 is pressed and the projection 20 abuts from above, and a second fulcrum 28 that is supported when the projection 20 over the elastic member 21 abuts from below is supported. Since the structure is simple, the structure is simple, the number of parts is small, and the assembly workability is good. Therefore, the cost of the entire instrument can be reduced.

  In this electronic keyboard instrument, the length (L1) from the distal end portion 25a of the elastic member 21 with which the protrusion 20 abuts to the first fulcrum 27 is the length from the distal end portion 25a of the elastic member 21 to the second fulcrum 28. Since the length (L1 <L) is shorter than (L), the protrusion 20 of the key 2 that has been pressed comes into contact with the elastic piece 25 of the elastic member 21 of the keyboard chassis 1 from above, and the elastic piece 25 of the elastic member 21 is When overcoming by bending and deforming, the repulsive force of the elastic piece 25 of the elastic member 21 can be strengthened by the first fulcrum 27, thereby increasing the key load and feeling that the key load is suddenly removed from the key 2. A strong click feeling can be imparted.

  Further, in this electronic keyboard instrument, the length (L) from the distal end portion 25 a of the elastic member 21 with which the protrusion 20 abuts to the second fulcrum 28 is the length from the distal end portion 25 a of the elastic member 21 to the first fulcrum 27. Therefore, when the depressed key 2 returns to the initial position, the protrusion 20 of the key 2 contacts the elastic piece 25 of the elastic member 21 of the keyboard chassis 1 from below. In contact, when the elastic deformation 25 is bent and deformed, the repulsive force of the elastic piece 25 of the elastic member 21 can be weakened by the second fulcrum 28, thereby reducing the key load and It is possible to prevent a feeling of clicking as if the load is lost.

  Therefore, when the protruding portion 20 of the pressed key 2 comes into contact with the elastic piece 25 of the elastic member 21 from above and gets over the elastic piece 25, a strong click feeling is given as if the key load is heavy. In addition, when the depressed key 2 returns to the initial position, when the protruding portion 20 of the key 2 comes into contact with the elastic piece 25 of the elastic member 21 from below and gets over, the key load is reduced to reduce the key load. Because the click feeling of 2 is almost unaffected, it is possible to obtain a key touch feeling similar to that of an acoustic piano with a simple structure, and performers perform well without any discomfort. can do.

  In this case, the notched groove 29 is provided at the location of the elastic member 21 located at the second fulcrum 28 along the direction orthogonal to the front-rear direction of the key 2 so that the key 2 that has been depressed is initially When returning to the position, when the protruding portion 20 of the key 2 abuts against the elastic piece 25 of the elastic member 21 from below and pushes up the elastic piece 25, the cutout groove 29 at the location corresponding to the second fulcrum 28 causes elasticity. The repulsive force of the piece 25 can be further reduced. For this reason, since the key load can be hardly applied to the key 2, it is possible to obtain a key touch feeling similar to the key touch feeling of an acoustic piano in which a click feeling is not applied to the key 2 when the key is released.

  In the above-described first embodiment, the case where the notch groove 29 is provided at the location corresponding to the second fulcrum 28 of the elastic piece 25 of the elastic member 21 has been described. However, the notch groove is not necessarily provided in the elastic piece 25. 29 need not be provided. In this case, the difference (L) between the length (L1) from the tip 25a of the elastic piece 25 to the first fulcrum 27 and the length (L) from the tip 25a to the second fulcrum 28 of the elastic piece 25. -L1) may be sufficiently larger than that of the first embodiment described above.

(Embodiment 2)
Next, a second embodiment of the electronic keyboard instrument to which the present invention is applied will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as Embodiment 1 shown by FIGS.
As shown in FIG. 10, the electronic keyboard instrument has a configuration different from that of the first embodiment in a click feeling imparting member 35 that imparts a click feeling to the key 2 during a key pressing operation. It has become.

  That is, as shown in FIGS. 10 and 11, the click feeling imparting member 35 has a deformation adjustment plate 36 disposed on the lower surface of the elastic member 21, and the elastic member 21 is placed on the base member 22 via the deformation adjustment plate 36. It is the configuration attached to. Also in this case, the elastic member 21 is fixed to the fixing portion 24 by the screw 23 in a state where the elastic member 21 is arranged on the base member 22 via the deformation adjusting plate 36, and A plurality of elastic pieces 25 are provided so as to protrude rearward (left side in FIG. 10) of the key 2 in a state corresponding to the key 2 respectively.

  As shown in FIGS. 10 and 11, the elastic member 21 also has a plurality of elastic pieces 25 on the rear end (left end in FIG. 10) on the rear end of the fixing portion 24 on the rear side (left side in FIG. 10). The entire structure is formed in a comb-like shape with the structure integrally formed in a state of projecting. The fixing portion 24 is interposed between the deformation adjusting plate 36 and the presser plate 26 in a sandwich state by disposing the presser plate 26 on the upper portion of the fixed plate 24 while being arranged on the deformation adjusting plate 36. The base member 22 is fixed by screws 23.

  As shown in FIGS. 10 and 11, the presser plate 26 has a band plate shape that is continuous in the arrangement direction of the keys 2, and is formed to have approximately the same size as the fixing portion 24 of the elastic member 21. As a result, the presser plate 26 has the fixing portion 26 in a state where the rear end portion (left end portion in FIG. 10) located on the rear side of the key 2 and the rear end portion of the fixing portion 24 substantially coincide with each other as in the first embodiment. The fixing portion 24 is pressed against the fixing portion 24.

  As shown in FIGS. 10 to 12, the deformation adjusting plate 36 includes a band plate-shaped main body portion 36a that is continuous in the arrangement direction of the keys 2, and a rear end portion (the left end portion in FIG. 10) of the main body portion 36a. The plurality of support protrusions 36b are integrally formed with each projecting toward the rear side (left side in FIG. 10) of the key 2, and like the elastic member 21, the whole is formed in a substantially comb-like shape. ing. The deformation adjustment plate 36 projects from the base member 22 toward the rear of the key 2 (left side in FIG. 10) with the front end portion (right end portion in FIG. 10) substantially coinciding with the front end portion of the fixing portion 24. Is configured to do.

  As shown in FIG. 10, the plurality of elastic pieces 25 protrude from the deformation adjustment plate 36 toward the rear of the key 2 (left side in FIG. 10), and the protruding tip end portion 25 a is not pressed. In the initial state, the key 2 is disposed so as to be located below the protrusion 20 provided on the position restricting portion 7. Accordingly, as shown in FIGS. 10 to 12, when the protruding portion 20 of the position restricting portion 7 of the key 2 comes into contact with the distal end portion 25 a of the elastic piece 25 from the vertical direction, the elastic piece 25 is bent and deformed. The elastic piece 25 is configured to get over the tip 25a.

  In this case, as shown in FIG. 10, the elastic piece 25 includes a first fulcrum 37 that is supported when the key 2 is pressed and the projection 7 of the position restricting portion 7 abuts from above, and the position restricting portion. And the second fulcrum 38 that is supported when the seven projecting portions 20 come into contact with each other from below. As shown in FIG. 10, the first fulcrum 37 is located at the tip 36 c of the support protrusion 36 b of the deformation adjustment plate 36 that protrudes rearward (left side in FIG. 10) from the base member 22. That is, as shown in FIG. 10, the first fulcrum 27 is a length (La) from the tip 25a of the elastic piece 25 with which the projection 20 abuts to the tip 36c of the support projection 36b of the deformation adjusting plate 36. It is installed in the position corresponding to.

  Further, as shown in FIG. 10, the second fulcrum 28 is a boundary portion between the elastic piece 25 and the fixing portion 24, that is, a front portion corresponding to the rear end portion of the fixing portion 24, and a rear end portion 26 a of the pressing plate 26. Is located in the front part corresponding to. That is, the second fulcrum 38 is the length (Lb) from the front end portion 25a of the elastic piece 25 with which the protrusion 20 abuts to the rear end portion 26a of the presser plate 26, that is, the length (L) of the elastic piece 25. It is installed at a position corresponding to the same length (Lb = L).

  Also in this case, as shown in FIG. 10, the first fulcrum 37 has a length (La) from the tip 25a of the elastic piece 25 to the tip 36c of the support projection 36b of the deformation adjusting plate 36. 25 (L <Lb) shorter than the length (Lb) from the tip 25a to the second fulcrum 38, that is, the length (L = Lb) from the tip 25a of the elastic piece 25 to the rear end 26a of the presser plate 26. Lb) is installed.

  By the way, as shown in FIGS. 12A and 12B, the deformation adjustment plate 36 has a length (S1, S2) protruding rearward from the rear end portion (left end portion in FIG. 12) of the base member 22. However, it is formed so that it is long (S1) on the low sound side and gradually becomes short (S2 <S1) toward the high sound side. For this reason, the first fulcrum 37 of the elastic piece 25 located on the low frequency range side is, as shown in FIG. 12A, from the tip 25a of the elastic piece 25 to the tip 36c of the support projection 36b of the deformation adjusting plate 36. Is set to be significantly shorter than the length of the elastic piece 25 (L = Lb).

  The first fulcrum 37 of the elastic piece 25 located on the high sound range side is from the tip 25a of the elastic piece 25 to the tip 36c of the support projection 36b of the deformation adjusting plate 36 as shown in FIG. Is longer than the length (La1) from the tip 25a of the elastic piece 25 to the tip 36c of the support projection 36b of the deformation adjusting plate 36 (La2> La1). The length is set to be sufficiently shorter (La1 <La2 <Lb = L) than the length of the elastic piece 25 (L = Lb).

  Thereby, as shown in FIG. 12A, the elastic piece 25 is supported by the first fulcrum 37 when the protrusion 20 of the position restricting portion 7 comes into contact with the key 2 when the key 2 is pressed. In this state, the key 2 is configured to bend and deform downward and to apply a key load to the key 2. In this case, since the length (La1) from the tip 25a to the first fulcrum 37 is much shorter than the length (L = Lb) of the elastic piece 25, the elastic piece 25 located on the low frequency range side is elastic. The repulsive force of the piece 25 is strong, and the key load applied to the key 2 is increased.

  For this reason, as shown in FIG. 12A, the elastic piece 25 is bent downward by the key 2 being pressed and pushed down by the protrusion 20 of the position restricting portion 7. When the projection 20 is deformed and gets over the tip 25a of the elastic piece 25, the key load is suddenly reduced, and a click feeling that the key load is suddenly removed is given to the key 2 to return to the original state elastically. Is configured to do.

  In addition, as shown in FIG. 12B, the elastic piece 25 located on the high frequency range side has a length (La2) from the tip 25a to the first fulcrum 37 that is the length of the elastic piece 25 (L = Lb). ) Is sufficiently shorter (La2 << Lb = L), the repulsive force of the elastic piece 25 is strong and the key load applied to the key 2 is increased.

  In this case, the length (La2) from the distal end portion 25a of the elastic piece 25 to the distal end portion 36c of the support projection 36b of the deformation adjusting plate 36 is from the distal end portion 25a of the elastic piece 25 to the deformation adjusting plate on the low frequency side. Since the length (La1) is longer than the length (La1) to the tip 36c of the support projection 36b of 36, the elastic piece 25 on the high sound region side has a little repulsive force than the elastic piece 25 on the low sound region side. The key load applied to the key 2 is weak and is configured to be slightly lighter than the low frequency range side.

  Further, when the elastic piece 25 returns to the initial position after the key 2 is depressed and the protrusion 20 of the position restricting portion 7 has passed over the tip 25a of the elastic piece 25, the elastic piece 25 is moved to the initial position shown in FIG. As shown in FIG. 12 (b), when the protrusion 20 abuts from below, it is configured to bend and deform toward the upper side while being supported by the second fulcrum 38.

  In this case, as shown in FIGS. 12A and 12B, the elastic piece 25 has a length (Lb) from the tip 25a to the second fulcrum 38 that is the length (L) of the elastic piece 25. Since the repulsive force of the elastic piece 25 is sufficiently weaker than when it is bent about the first fulcrum 37, it is given to the key 2. The key load is greatly reduced. Thereby, as shown in FIGS. 12 (a) and 12 (b), the elastic piece 25 is elastically restored to its original state by the projection 20 slightly over the tip 25a of the elastic piece 25, and the key is locked. 2 is returned to the initial position.

Next, the operation of the click feeling imparting member 35 in this electronic keyboard instrument will be described.
In this case, when the key 2 is pressed and rotated around the bent portion 3 that is the rotation fulcrum of the key 2, the first inclined surface 20 a of the projection 20 in the position restricting portion 7 of the key 2 is placed on the keyboard chassis 1. The elastic piece 25 of the elastic member 21 disposed via the deformation adjusting plate 36 is in contact with the elastic piece 25 from above, and the elastic piece 25 is pushed down. Then, the elastic piece 25 is bent and deformed around the first fulcrum 37.

  At this time, the length (La1, La2) from the distal end portion 25a of the elastic piece 25 to the first fulcrum 37 is sufficiently shorter (La1, La2 << L) than the length (L) of the elastic piece 25. The repulsive force of the piece 25 is strong, and the key load applied to the key 2 becomes suddenly heavy as in the first embodiment. When the first inclined surface 20a of the protrusion 20 in the position restricting portion 7 of the key 2 gets over the elastic piece 25 of the elastic member 21, the load due to the repulsive force of the elastic piece 25 against the key 2 is eliminated, so that the key load is reduced. It becomes lighter abruptly and gives the key 2 a click feeling as if the key load is lost.

  In this case, as shown in FIG. 12A, the first fulcrum 37 of the elastic piece 25 located on the low-frequency region side extends from the tip 25a of the elastic piece 25 to the tip 36c of the support projection 36b of the deformation adjustment plate 36. (La1) is shorter than the length (La2) from the distal end portion 25a of the elastic piece 25 to the distal end portion 36c of the support projection 36b of the deformation adjusting plate 36 on the high sound range side (La1 <La2). The length is set to be sufficiently shorter (La1 << Lb = L) than the length of the elastic piece 25 (L = Lb).

  For this reason, as shown in FIG. 12A, the elastic piece 25 is directed downward while the projection 20 of the position restricting portion 7 of the key 2 is in contact with the upper side and is supported by the first fulcrum 37. When the elastic member 25 is bent and deformed, the repulsive force of the elastic piece 25 is stronger than that of the high sound region side, and a heavy key load is applied to the key 2. As a result, as shown in FIG. 12A, when the protrusion 20 of the position restricting portion 7 of the key 2 gets over the tip 25a of the elastic piece 25, the elastic piece 25 becomes lighter and the key load becomes lighter. 2 is strongly given a click feeling that the key load is suddenly removed.

  The first fulcrum 37 of the elastic piece 25 located on the high sound range side is from the tip 25a of the elastic piece 25 to the tip 36c of the support projection 36b of the deformation adjusting plate 36 as shown in FIG. Is slightly longer (La2> La1) than the length (La1) from the tip 25a of the elastic piece 25 to the tip 36c of the support protrusion 36b of the deformation adjusting plate 36 on the low sound range side, The length is set to be sufficiently shorter (La2 << Lb = L) than the length of the elastic piece 25 (L = Lb).

  For this reason, as shown in FIG. 12B, the elastic piece 25 is directed downward while the protrusion 20 of the position restricting portion 7 of the key 2 is in contact from above and supported by the first fulcrum 37. When the elastic member 25 is bent and deformed, the repulsive force of the elastic piece 25 is slightly weaker than that of the low frequency range, but a heavy key load is applied to the key 2. Thereby, as shown in FIG. 12B, when the protrusion 20 of the position restricting portion 7 of the key 2 gets over the tip 25a of the elastic piece 25, the elastic piece 25 is suddenly lightened and the key load is lightened. 2 is given a slightly weaker click feeling than when the key load is suddenly lost.

  On the other hand, when the pressed key 2 returns to the initial position, the key 2 is pushed upward by the elastic return force of the bent portion 3 provided at the rear end of the key 2 as in the first embodiment. The second inclined surface 20b of the protrusion 20 in the position restricting portion 7 of the key 2 is pushed up by the repulsive force (elastic return force) of the dome-shaped bulging portion 17 in the switch portion 14 of the switch member 11, and the keyboard chassis 1 Since the elastic piece 25 is pushed up by coming into contact with the distal end portion 25a of the elastic piece 25 of the elastic member 21 disposed above, the elastic piece 25 is bent and deformed around the second fulcrum 38.

  At this time, as shown in FIGS. 12A and 12B, the length (Lb) from the tip 25a of the elastic piece 25 to the second fulcrum 38 is substantially equal to the length (L) of the elastic piece 25. Since it is installed at a position corresponding to the length (Lb = L), the repulsive force of the elastic piece 25 is sufficiently weaker than that in the case of bending and deforming around the first fulcrum 37 and is applied to the key 2. The key load is greatly reduced. As a result, the elastic piece 25 is clicked as if the projection 20 is slightly over the tip 25a of the elastic piece 25 and the key load is released from the key 2 as shown in FIGS. 12 (a) and 12 (b). The key 2 is returned to the initial position by elastically returning to the original state with little feeling.

  As described above, according to this electronic keyboard instrument, in addition to the same effects as those of the first embodiment, the first fulcrum 37 is arranged on the lower surface of the elastic member 21 from the distal end portion 25a of the elastic piece 25 of the elastic member 21. Is provided with a deformation adjusting plate 36 for adjusting the length (La, La1, La2) up to the length of the elastic member 21 from the tip 25a of the elastic piece 25 to the first fulcrum 37. By adjusting (La, La1, La2), the repulsive force of the elastic piece 25 can be adjusted, whereby the strength of the click feeling given to the key 2 can be optimized.

  In this case, in the deformation adjusting plate 36, the length (La) from the tip 25a of the elastic piece 25 of the elastic member 21 to the first fulcrum 37 is short on the low frequency range side (La1 <La2), and goes toward the high frequency range side. Accordingly, the repulsive force of the elastic piece 25 located on the low sound region side is made stronger than the repulsive force of the elastic piece 25 located on the high sound region side by being provided so as to become gradually longer (La2> La1). In addition, the repulsive force of the elastic piece 25 located on the high sound range side can be made weaker than the repulsive force of the elastic piece 25 located on the low sound region side.

  For this reason, the key load of the key 2 located on the low frequency range side is increased with the key load of the key 2 positioned on the high frequency range side, and the click feeling given to the key 2 on the low frequency range side is increased. The key 2 can be made stronger than the click feeling given to the key 2, and the key load of the key 2 located on the high frequency range side is slightly reduced, and the key load of the key 2 located on the low frequency range side is slightly lightened. The click feeling given to the key 2 can be made slightly weaker than the click feeling given to the key 2 on the low frequency range side. As a result, it is possible to obtain a key touch feeling that is more similar to the key touch feeling of an acoustic piano with a simple structure, and the player can perform well without a sense of incongruity.

  In the second embodiment described above, a notch groove 29 may be provided at the location of the elastic piece 25 corresponding to the second fulcrum 38 as in the first embodiment. With this configuration, as in the first embodiment, when the key 2 that has been pressed returns to the initial position, even if the protrusion 20 pushes up the distal end portion 25a of the elastic piece 25, the protrusion 20 is lightly applied. Since the tip 25a of the elastic piece 25 passes through, it is possible to further prevent the click feeling from being given to the key 2 when the key is released.

  In the second embodiment described above, the deformation adjustment plate 36 is integrated with the band plate-like main body portion 36a continuous in the arrangement direction of the keys 2 and the rear end portion of the main body portion 36a corresponding to each key 2 respectively. However, the present invention is not limited to this. For example, the deformation adjusting plate is formed individually corresponding to each key 2 individually. It may be. In this case, by attaching the deformation adjustment plate to each key 2 so as to be movable in the front-rear direction of the key, the click feeling can be adjusted for each key, and the key touch feeling can be finely adjusted. .

  Furthermore, in the above-described first and second embodiments and the modifications thereof, the case where the protrusion 20 is provided on the position restricting portion 7 of the key 2 has been described. However, the protrusion 20 is necessarily provided on the position restricting portion 7 of the key 2. For example, it may be provided at any location of the key 2 such as a location guided by the key guide portion 6 of the keyboard chassis 1.

  Further, in the first and second embodiments and the modifications thereof described above, the protrusion 20 protrudes toward the front side of the key 2 (the right side in FIGS. 2 and 10), and the elastic piece 25 of the elastic member 21 is Although the case where it protruded toward back (left side in FIG. 2 and FIG. 10) was described, it is not restricted to this, A protrusion part is protruded toward the back of the key 2, and the elastic piece 25 of the elastic member 21 is the key 2 It may be configured to protrude toward the front side.

  The keyboard device according to the present invention is not limited to the above-described first and second embodiments and the modifications thereof, and can be rotated in the vertical direction in a state where a plurality of hammer members are associated with each key 2 in the keyboard chassis 1. The present invention can also be applied to a configuration in which an action load is applied to the key 2 by rotating the hammer member in accordance with the key pressing operation of the key 2.

DESCRIPTION OF SYMBOLS 1 Keyboard chassis 2 Key 3 Bending part 4 Common connection part 5 Key support part 7 Position control part 18, 35 Click feeling provision member 20 Protrusion part 21 Elastic member 22 Base member 23 Screw 24 Fixing part 25 Elastic piece 25a Tip part 26 Holding plate 27, 37 First fulcrum 28, 38 Second fulcrum 29 Notch groove 36 Deformation adjusting plate L1, La Length from the tip of the elastic piece to the first fulcrum L, Lb From the tip of the elastic piece to the second fulcrum Length La1 Length from the tip of the elastic piece to the first fulcrum in the low sound range La2 Length from the tip of the elastic piece to the first fulcrum in the high sound range

Claims (4)

In a keyboard device comprising a keyboard chassis, a key provided rotatably on the keyboard chassis in a vertical direction, and a click feeling imparting member that imparts a click feeling to the key when the key is pressed.
The click feeling imparting member is provided on the key and the keyboard chassis, and when the key is pressed, the projection comes into contact with the projection from above to bend and deform. An elastic member over which the part gets over,
The elastic member is supported when a first fulcrum that is supported when the key is pressed and the protrusion comes into contact from above, and when the protrusion that has overcome the elastic member comes into contact from below. A second fulcrum, and the first fulcrum is located at a position where the length from the tip of the elastic member with which the protrusion abuts is shorter than the length from the tip of the elastic member to the second fulcrum. A keyboard device characterized by being installed.   The keyboard apparatus according to claim 1, wherein a groove portion is provided at a position of the elastic member located at the second fulcrum along a direction orthogonal to the front-rear direction of the key.   The deformation adjusting plate is provided on the lower surface of the elastic member and adjusts the length from the tip portion of the elastic member to the first fulcrum. Keyboard equipment. The deformation adjusting plate is provided in a state where a length from the distal end portion of the elastic member to the first fulcrum is short on a low sound range side and gradually becomes longer toward a high sound range side. The keyboard device according to claim 3.

Images