JP5861505B2 - Keyboard device - Google Patents

Description

  The present invention relates to a technique for adjusting a key pressing load in a keyboard device.

  2. Description of the Related Art Conventionally, there has been known a keyboard device that can adjust a static load in key depression. For example, the keyboard device disclosed in Patent Document 1 below has a hooking portion in a step shape at the rear end of the key, and a spring is stretched between the chassis and a key pressing reaction force is obtained. The tension of the spring can be adjusted by selecting the hooking portion on which the spring is stretched, and the static load can be adjusted.

  Further, in a keyboard apparatus having a hammer body that imparts inertia to the key rotation operation, the restoring force due to the weight of the hammer body is usually involved as a reaction force in the static load when the key is pressed. In the keyboard device disclosed in Patent Document 1 described below, the inertial force can be adjusted by selectively cutting off the weight formed on the hammer body to change the mass distribution. As the inertia force is adjusted, the return force applied by the hammer body in the key release direction also changes, and as a result, the static load also changes.

Japanese Utility Model Publication No. 52-52930 No. 5-8635 Gazette

  However, in the keyboard devices of Patent Documents 1 and 2, even if the static load is adjusted, only the magnitude of the key pressing reaction force is changed, and the adjustable amount is not large.

  The main force that is the source of the key pressing load is a spring in Patent Document 1 but a hammer body in Patent Document 2, and both have different characteristics of the key pressing reaction force. That is, the reaction force on which a characteristic such as a spring constant acts increases as the key pressing stroke becomes deeper. When adjusting the static load, it is desirable to consider the characteristics of the key pressing reaction force.

  Further, the appropriate static load varies depending on the type of keyboard instrument (for example, organ and acoustic piano). No deep effort has been made to achieve different instrument touches with the same keyboard device.

  The present invention has been made in order to solve the above-described problems of the prior art, and the object thereof is to make it possible to switch the reaction force against the key press and the assisting force, thereby making it possible to largely adjust the key press load. It is to provide a keyboard device.

  In order to achieve the above object, the keyboard device according to claim 1 of the present invention includes an upward contact portion (12) facing upward and a position above the upward contact portion, in front of the key fulcrum (Pk). A downward contact portion (18a) that is positioned and faces downward, and is provided in a fixed manner, and pivots in the direction of pressing and releasing about each key fulcrum, and at least a first state; A support portion (21) whose position or posture is variable with respect to the second state; and an elastic member (23) which is cantilevered by the support portion and is flexible in the vertical direction. Is in the first state, the elastic member is elastically bent in the key-pressing process and abuts on the upward contact portion from above, and the key is urged in the key-pressing direction. When a supporting force is applied to the key pressing force, while the support portion is in the second state, the elastic force is applied in the key pressing stroke. The material is elastically bent to contact the downward contact portion from below, and the key is biased in the key release direction so that a reaction force is applied to the key pressing force. Features.

  Preferably, it is provided corresponding to the key and is driven by the corresponding key to rotate about the hammer fulcrum (Ph) in conjunction with the key and to rotate the corresponding key. A hammer body (HM) for imparting inertia and a switching means (34) for switching the rotation position of the hammer body in a non-key-pressed state by operation, and by operating the switching means, the hammer body is It is possible to switch between a driving position driven by a corresponding key and a non-driving position that is not driven (claim 2).

  Preferably, the position or posture of the support portion is switched in conjunction with the operation of the switching means. When the hammer body is located at the drive position, the support portion is in the first state, and the hammer is When the body is located at the non-driving position, the support portion is in the second state (Claim 3).

  Preferably, when the hammer body is located at the driving position and when the hammer body is located at the non-driving position, the static load at the time of key depression is substantially the same (Claim 4).

  Preferably, the support portion is capable of taking a state in the middle between the first state and the second state, and the elastic member is disposed in the upward contact portion and the lower portion in the key pressing stroke. It can be in a state where it does not contact any of the direction contact portions.

  In addition, the code | symbol in the said parenthesis is an illustration.

  According to the first aspect of the present invention, it is possible to switch between the reaction force against the key press and the assisting force, thereby making it possible to largely adjust the key press load.

  According to the second aspect, it is possible to switch the presence / absence of inertial force by the hammer body.

  According to the third aspect, it is possible to switch the generation of the spring force and the reaction force in conjunction with the switching of the presence / absence of the inertial force.

  According to the fourth aspect, the static loads in the respective states with and without inertia can be substantially matched.

  According to the fifth aspect, it is possible to finely adjust the static load.

It is sectional drawing of the principal part which paid its attention to one key of the electronic keyboard apparatus which concerns on one embodiment of this invention, and is a figure which shows a piano touch state (figure (a)) and an organ touch state (figure (b)). is there. It is a top view (figure (a)) of a static load adjustment means, and a side view (figure (b)) of a rotation operation part. It is a top view (figure (a)) of the cam mechanism part of a modification, and a side view (figure (b)) of a rotation operation part. It is a typical side view of the link structure of a modification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIGS. 1A and 1B are cross-sectional views of a main part focusing on one key of a keyboard device according to an embodiment of the present invention. This keyboard device has a plurality of keys 10 arranged in parallel and a hammer body HM corresponding to them, and is suitable for a keyboard instrument or an electronic keyboard instrument. In FIGS. 1A and 1B, a white key is illustrated as the key 10. In the present invention, the key 10 corresponds to a white key and a black key, but their configuration and the configuration of the corresponding components are basically the same. Hereinafter, the right side of FIGS. 1A and 1B is assumed to be the front.

  The key 10 is disposed in a frame (not shown) so as to be rotatable in the direction of pressing and releasing keys around the key fulcrum Pk of the rear end 10a. The key 10 is a key structure in which a vertical middle portion 10b in the front half is a wood portion and the other portions are made of resin. The key 10 has a drive unit 11 protruding therefrom. The hammer body HM is disposed below the corresponding key 10 and is disposed so as to be rotatable about the hammer fulcrum Ph. The hammer body HM has a rod-like portion 15 where the mass is concentrated, and is always urged counterclockwise in FIG. 1 by its own weight. A hammer upper limit stopper 13 and a hammer lower limit stopper 14 are provided on the keyboard device body (chassis, shelf board, etc.).

  An upward contact portion 12 is fixed to the upper portion of the rear end portion 10a of the key 10 in front of the key fulcrum Pk. In addition, a crank-type stopper member 18 is fixed to the upper portion of the intermediate portion in the longitudinal direction of the key 10. A lower surface of a portion of the rear portion of the stopper member 18 that is separated from the upper surface of the key 10 serves as a downward contact portion 18a. The upper surface of the upward contact portion 12 faces upward, and the downward contact portion 18a is located above the upward contact portion 12 and faces downward.

  In the present embodiment, switching of a touch like an acoustic grand piano (hereinafter referred to as a piano touch) and a touch like an organ (hereinafter referred to as an organ touch) is realized by operating the cam mechanism unit 30. 1A and 1B, the key 10 is in a non-pressed state, but the state by the cam mechanism 30 indicates a piano touch state and an organ touch state, respectively.

  An actuator 40 is disposed below the front part of each key 10. The actuator 40 operates so that the plunger 41 protrudes upward by passing a current through the solenoid coil 45, and applies a force to the front part of the corresponding key 10. The actuator 40 is provided with a solenoid spring 42. Even when no electromagnetic driving force is generated, the front portion of the key 10 is moved upward via the plunger 41 by a weak force due to the elasticity of the solenoid spring 42 ( Always released in the key release direction).

  The solenoid coil 45 and the plunger 41 of the actuator 40 on the rear side correspond to other keys (not shown). The actuator 40 is controlled so that the touch feeling at the time of key pressing becomes a programmed feeling, and is changed and controlled to a different touch feeling depending on the change setting. An intermediate touch between piano touch and organ touch is also possible.

  Although details will be described later, the state (position or posture, which is the position in the rotational direction in the present embodiment) of the base portion 21 that is a support portion that cantileverly supports the counter spring 23 that is flexible in the vertical direction is variable. It is. In the piano touch, the base 21 is in the “first state” (FIG. 1A), and the counter spring 23 comes into contact with and presses the upward contact portion 12 from the upper side, whereas in the organ touch, the base 21 is in the “first state”. 2 ”(FIG. 1B), the counter spring 23 contacts and presses the downward contact portion 18a from below. Further, the rotation position of the hammer body HM corresponds to the first state and the second state of the base portion 21, respectively, “drive position” driven by the corresponding key 10 and “non-drive position” not driven. To position.

  Here, the weight of the touch is grasped by the dynamic load including the influence of the inertial force when the key is pressed and the static load when the key is pressed very slowly. The static load is a minimum key pressing force necessary to start pressing the key pressing position P1 and starting to displace the key 10 in the key pressing direction in the non-key pressing state. The appropriate value of the static load at the time of key depression differs depending on the sound range, and the lower side is set to be heavier. The static load is about 55 gf for piano and about 40 gf for organ, but both may be considered to be almost the same at 50 gf.

  In the piano touch state (FIG. 1 (a)), in the non-key-pressed state, the hammer body HM has its rod weight 15 in contact with the hammer lower limit stopper 14 due to its own weight, and the initial rotation position is restricted. At the same time, the driven portion 16 of the hammer body HM comes into contact with the driving portion 11 of the key 10 and the initial rotation position (rest position) of the key 10 is also restricted. In addition, you may provide the stopper for engaging with the key 10 and regulating the further rotation to the key release direction of the key 10. FIG.

  When the key is pressed, the drive unit 11 of the key 10 drives the driven unit 16 of the hammer body HM. Then, the hammer body HM rotates in conjunction with the rotation direction (clockwise direction in FIG. 1) corresponding to the key pressing direction, and the rod-shaped portion 15 contacts the hammer upper limit stopper 13. Thereby, the rotation end position (end position) of the hammer body HM and the key 10 is regulated.

  Further, the keyboard device is provided with a link structure 20 which is a rotating body. The link structure 20 and the cam mechanism 30 constitute a static load adjusting means for adjusting the static load when the key is depressed. The static load adjusting means will be described below with reference to FIG. 1 and FIG.

  2A and 2B are a plan view of the static load adjusting means and a side view of the rotation operation unit, respectively.

  The static load adjusting means is provided in common for the plurality of keys 10, and in the present embodiment, one static load adjusting means is provided in the keyboard device in common for all the keys 10. The link structure 20 has a base 21, and the base 21 is disposed so as to be rotatable in the clockwise and counterclockwise directions of FIG.

  The link structure 20 includes a link arm 22 and a counter spring 23. The cam mechanism unit 30 includes a first cam 31, a second cam 32, a rotation shaft unit 33, and a rotation operation unit 34. There is only one component of the cam mechanism 30 and one link arm 22, but a counter spring 23 is provided for each key 10.

  In the link structure 20, the base 21 is disposed behind the key 10. The link arm 22 is fixed to the base portion 21 in the vicinity of the side portion of the keyboard apparatus body, is formed in a crank shape in a side view, and the lower portion extends below the rear end portion 10a of the key 10. The counter spring 23 has a base end fixed to the base 21 and extends forward (to the right in FIG. 1), is supported by the base 21 in a cantilever state, and is positioned or posture (position and / or position) as the base 21 rotates. (Posture) is variable. The counter spring 23 is disposed above the rear end portion 10a of the key 10 (FIG. 1), and the arrangement space is effectively utilized in the keyboard device having the hammer body HM. The front end of the counter spring 23 is located above the rear end portion 10 a of the key 10.

  As shown in FIGS. 1A and 1B, the tip of the counter spring 23 is curved so as to protrude downward, and the lower end of the curved portion presses the upward contact portion 12. It becomes the 1st press part 23a which can be performed. Further, the tip of the counter spring 23 is substantially horizontal, and serves as a second pressing portion 23b that can press the downward contact portion 18a upward.

  The counter spring 23 gives an assisting force for assisting the corresponding key 10 in the key pressing direction in a state where the first pressing portion 23 a presses the upward contact portion 12 due to its elasticity. On the other hand, the counter spring 23 applies a reaction force in the key pressing direction to the corresponding key 10 in a state where the second pressing portion 23b presses the downward contact portion 18a due to its elasticity.

  As shown in FIGS. 1 and 2, in the cam mechanism portion 30, the turning shaft portion 33 is pivotally supported with respect to the keyboard device main body. The first cam 31 and the second cam 32 are fixed to the rotation shaft portion 33 and configured to rotate integrally with the keyboard device body together with the rotation shaft portion 33. The first cam 31 is formed in an oval shape when viewed from the side (FIG. 1), and the pointed portion serves as a drive portion 31a that drives the corresponding rod-like portion 15 of the hammer body HM.

  The second cam 32 is provided at the same position as the link arm 22 in the key arrangement direction (FIG. 2A). The second cam 32 has a cam surface 32 a that slides and drives the contacted portion 22 a (FIG. 1) below the link arm 22. The link structure 20 is always strongly urged counterclockwise in FIG. 1 by urging means (not shown). The region on the rear end side (left side in FIG. 1) of the cam surface 32a abuts against the abutted portion 22a and regulates the rotation position of the link arm 22. As the rotation shaft portion 33 rotates from the state shown in FIG. 1A to the state shown in FIG. 1B, the rear end position of the cam surface 32a is gradually displaced rearward. A pair of the second cam 32 and the link arm 22 may be provided on both the left and right sides of the keyboard device body.

  As shown in FIG. 2A, the rotation shaft portion 33 is connected and fixed to the rotation operation portion 34 and is rotated by the rotation operation of the rotation operation portion 34. The rotation operation unit 34 is a switching unit that switches a rotation position of the hammer body HM in a non-key-pressed state by an operation. The rotation operation unit 34 is disposed outside the fixed unit 17 and is disposed at a position where manual operation is possible. The fixing portion 17 is a portion fixed to the keyboard device main body, and is, for example, a chassis side portion or a side plate. As shown in FIG. 2B, the rotation operation portion 34 is formed with two fastening holes 36A and 36B. By engaging a fastener 35 such as a screw or pin via a fastening hole 36A or 36B with a screw hole or a pin hole formed in the fixing portion 17 by screwing or fitting. The position of the rotation operation unit 34 in the rotation direction is defined and maintained at that position. Thereby, the position of the rotating shaft portion 33 and thus the cams 31 and 32 in the rotational direction is also defined and maintained.

  That is, the cam mechanism 30 is maintained at one of the two stable positions by the fastening holes 36A and 36B. The position screwed in the fastening hole 36A corresponds to the piano touch state shown in FIG. 1A, and the position screwed in the fastening hole 36B corresponds to the organ touch state shown in FIG.

  By the way, the actuator 40 gives force to the key 10 by giving a force to the key 10 when the plunger 41 exerts thrust based on the control of the CPU (not shown). Haptic control data for applying a haptic is stored in advance as a haptic application table in a storage unit (not shown). However, it is not essential to perform control so as to give a force sense. In this embodiment, a static load when force sense control is not performed is considered. It is assumed that the plunger 41 is in contact with the key 10 in the entire stroke of the key to be pressed and that only the urging force by the solenoid spring 42 is involved in the static load at the time of key pressing in the actuator 40.

  In this configuration, when the fastener 35 is engaged with the fastening portion of the fixing portion 17 via the fastening hole 36A, the piano touch state shown in FIG. That is, the cam surface 32a of the second cam 32 protrudes rearward. Since the link structure 20 is always urged counterclockwise in FIG. 1A, the link structure 20 is counterclockwise at the position where the contacted portion 22a of the link arm 22 contacts the cam surface 32a. The rotational position is regulated.

  In this state, the base 21 is in the first state, and the first pressing portion 23a comes into contact with the upward contact portion 12 from above with the counter spring 23 being elastically bent in the key pressing process, and the key 10 is urged in the key-pressing direction, and an assisting force is given to the key-pressing force. The state in which the first pressing portion 23a elastically presses the upward contact portion 12 is continued in the entire stroke of the pressing / releasing key.

  On the other hand, the drive part 31a of the first cam 31 faces rearward and does not contact the rod-like part 15 of the hammer body HM. Therefore, the hammer body HM is stationary at the initial rotation position where the rod-shaped portion 15 contacts the hammer lower limit stopper 14. That is, the hammer body HM is located at a driving position driven by the key 10. If the key is depressed in this state, an inertial force by the hammer body HM is applied to the rotation operation of the key 10.

  In the piano touch state shown in FIG. 1A, the static load at the time of key depression is determined by the balance of the rotational moment around the key fulcrum Pk. The following are involved as static loads.

  First, the force that the driven portion 16 of the hammer body HM urges the driving portion 11 of the key 10 upward and the actuator are assumed to generate the counterclockwise (key releasing direction) rotational moment in FIG. Forty solenoid springs 42 force the key 10 upward. These two are for applying a reaction force to the key depression, and the hammer body HM and the solenoid spring 42 become “key depression reaction force generating means”.

  On the other hand, when the key is pressed, the first pressing portion 23a of the counter spring 23 presses the upward abutting portion 12 and the key 10 is assumed to generate the clockwise moment (key pressing direction) of FIG. There are its own weight and a key pressing force at the key pressing position P1.

  In an environment where all these rotational moments act, the key pressing force at the key pressing position P1 necessary for the key 10 to start moving in the key pressing direction at the start of key pressing becomes a static load. In the piano touch state shown in FIG. 1A, the pressing force by the first pressing portion 23a of the counter spring 23 is set so that the static load is the same as the appropriate static load (for example, 50 gf) of the acoustic grand piano. ing.

  Next, the fastener 35 is once removed from the fastening hole 36A, the rotation operation portion 34 is rotated clockwise in FIG. 2B, and the fastener 35 is engaged with the fastening portion of the fixing portion 17 through the fastening hole 36B. Then, the organ touch state shown in FIG. That is, the protrusion of the second cam 32 to the rear side of the cam surface 32a is reduced, and the link structure 20 is rotated counterclockwise by the biasing force to the second cam 32 to the position shown in FIG.

  As the link structure 20 rotates, the counter spring 23 also rotates counterclockwise. Accordingly, the first pressing portion 23a of the counter spring 23 moves away from the upward contact portion 12, and the second pressing portion 23b contacts the downward contact portion 18a. That is, in this state, the base portion 21 is in the second state, and the second pressing portion 23b contacts the downward contact portion 18a from the lower side in a state where the counter spring 23 is elastically bent in the key pressing process. Then, the key 10 is urged in the key releasing direction, and a reaction force is applied to the key pressing force.

  The rotational moment generated when the link structure 20 is biased counterclockwise is sufficiently large with respect to the rotational moment applied to the link structure 20 when the second pressing portion 23b receives a force from the downward contact portion 18a. To do. Therefore, even if the second pressing portion 23b receives a force from the downward contact portion 18a, the link structure 20 does not rotate in the clockwise direction. The state in which the second pressing portion 23b elastically presses the downward contact portion 18a is continued in the entire stroke of the pressing / releasing key.

  On the other hand, by rotating the rotation operation portion 34 in the clockwise direction, the drive portion 31a of the first cam 31 drives the rod-like portion 15 of the hammer body HM upward, and the hammer body HM is as shown in FIG. It is displaced to a complete rotation end position (non-drive position) and is maintained as it is. In this state, since the driven part 16 of the hammer body HM is separated from the driving part 11 of the key 10 at the start of key depression, the restoring force by the hammer body HM is not given to the key 10. That is, the hammer body HM is located at a non-driven position that is not driven by the key 10. Even if the key is pressed in this state, the inertial force by the hammer body HM is not applied. However, the drive unit 11 comes into contact with the driven unit 16 just before the end of the key pressing during the push-off operation.

  In such an organ touch state (FIG. 1 (b)), compared with the piano touch state (FIG. 1 (a)), the key pressing reaction force is reduced by the amount that the return force of the hammer body HM does not work. The force due to the elasticity of the spring 23 acts as a key-pressing reaction force rather than an auxiliary force, and these are involved as a static load.

  Here, in the piano touch state and the organ touch state, the rotational moment based on the sum of the assisting force or reaction force by the counter spring 23 and the reaction force by the hammer body HM is set to be equal. As a result, even in the organ touch state, the static load is the same as in the piano touch state. On the other hand, since the inertial force due to the hammer body HM does not act, the touch feeling becomes like an organ.

  If the rotation operation unit 34 is rotated counterclockwise against the urging force of the link structure 20 in the counterclockwise direction, the piano touch state can be restored again. In this way, by a simple operation of the rotation operation unit 34, it is possible to switch between a piano touch with inertia force and an organ touch without inertia force without changing the static load.

  In this way, with a simple operation, the state is switched between a piano touch state with inertia by the hammer body HM and an organ touch state without inertia, and the static load is substantially matched in each state to maintain an appropriate static load. be able to. It is particularly suitable for switching the touch feeling between an acoustic grand piano and an organ.

  According to the present embodiment, by changing the state (position or posture) of the base portion 21, the pressing force due to the elasticity of the counter spring 23 is applied to either the upward contact portion 12 or the downward contact portion 18a. Can be switched. Therefore, it is possible to switch between the reaction force against the key press and the assisting force, and the key press load can be greatly adjusted.

  Further, since the rotation position of the hammer body HM is switched between the driving position and the non-driving position, it is possible to switch the presence / absence of inertia force by the hammer body HM. In addition, since the switching is interlocked with the switching of the state of the base portion 21, it is possible to switch the generation of the spring force assisting force and the reaction force by the counter spring 23 in conjunction with the switching of the presence / absence of inertia force.

  Moreover, since the static load at the time of key depression is substantially the same when the hammer body HM is located at the driving position and when it is located at the non-driving position, the static loads in each state with and without inertia should be substantially coincident. Can do.

  By the way, even when the base 21 is in the first state, the strength of the first pressing portion 23a pressing the upward contact portion 12 may be adjusted stepwise or steplessly. For example, in the organ touch state, the change in the position or posture of the counter spring 23 may be set so as to weaken the degree that the first pressing portion 23a presses the upward contact portion 12 and leave a little assisting force. . This can be set in any way by selecting the position or posture of the counter spring 23 and the spring constant.

  In the present embodiment, the rotation operation of the rotation operation unit 34 causes the hammer bodies HM corresponding to all the keys 10 to rotate at the same time to change the rotation position, and the counter springs 23 corresponding to all the keys 10. The position of was also moved at the same time. Since the rotation of the hammer body HM and the operation of changing the position of the counter spring 23 are one common operation, the static loads of all the keys 10 can be adjusted simultaneously by a simple operation. However, the static load adjusting means may be provided for each of the plurality of keys 10 instead of one for all the keys 10 so that the static loads of the plurality of keys 10 can be adjusted simultaneously.

  In addition, although the plate-shaped counter spring 23 was illustrated as an elastic member which gives the assistance force with respect to a key depression, it is not restricted to this. For example, a helical spring or rubber may be used.

  Further, it is not essential to provide the actuator 40. When the actuator 40 is not provided, the solenoid spring 42 of the actuator 40 is excluded from the “key pressing reaction force generating means” and the static load is considered.

  Note that the rotation operation unit 34 is an example of an operation unit that rotates the cam mechanism unit 30. In addition, as a means for maintaining the hammer body HM at a non-driven position that is not driven by a corresponding key at least at the time of the key press start, the fastener body 35 is used for fastening such as screwing through the fastening hole 36. The configuration is also an example. Therefore, it is not limited to these structures. For example, a configuration may be employed in which a gear is provided in the rotation operation unit 34 and a rack that meshes with the gear is provided in the fixing unit 17 so that the two are meshed at an appropriate relative position. If it does so, the fastener 35 and the fastening hole 36 will become unnecessary.

  By the way, in the present embodiment, the first cam 31 and the second cam 32 in the cam mechanism section 30 are integrally rotated by a common rotation operation of the rotation operation section 34. However, the present invention is not limited to this, and may be configured to rotate independently as shown in FIGS. 3A and 3B.

  FIGS. 3A and 3B are a plan view of a cam mechanism unit 30 according to a modification and a side view of the rotation operation unit. As shown in FIG. 3A, the rotation shaft portions 33L and 33R are pivotally supported with respect to the keyboard device main body, respectively. The first cam 31 is fixed to the rotation shaft portion 33R. The rotation shaft portion 33R is connected and fixed to the rotation operation portion 34R and is rotated by a rotation operation of the rotation operation portion 34R. The second cam 32 is fixed to the rotation shaft portion 33L. The rotation shaft portion 33L is connected and fixed to the rotation operation portion 34L and is rotated by a rotation operation of the rotation operation portion 34L. The rotation operation parts 34L and 33R are arranged outside the fixing parts 17L and 17R, respectively, and are arranged at positions where manual operation is possible.

  The configuration of the rotation operation portion 34R is the same as that of the rotation operation portion 34 shown in FIG. 2B, and two fastening holes 36A and 36B are formed (not shown). On the other hand, in addition to the fastening holes 36A and 36B, fastening holes 36C and 36D are formed in the rotation operation portion 34L. By engaging the fastener 35L with the fastening portion of the fixing portion 17L via any of the fastening holes 36A to 36D, the position in the rotational direction of the rotation operation portion 34L is defined and maintained at that position. As a result, the rotational shaft portion 33L and thus the position of the second cam 32 in the rotational direction are also defined and maintained.

  In such a configuration, the rotation operation unit 34L and the rotation operation unit 34R can be operated separately. For switching the inertial force between the piano touch state and the organ touch state, the rotation operation unit 34R is used. In the same manner as the rotation operation of the rotation operation unit 34 described with reference to FIGS. 1 and 2, the rotation operation unit 34R is rotated, so that the position of the hammer body HM is displaced and the inertia force is switched.

  On the other hand, when switching between the assisting force and the reaction force by the counter spring 23 between the piano touch state and the organ touch state, the rotation operation unit 34L is used. Since four fastening holes 36A to 36D are formed in the rotation operation portion 34L, the rotation position of the rotation operation portion 34L can be selected in four stages.

  For example, the fastening holes 36A, 36C both correspond to the piano touch state, but the case where the fastening holes 36C are fastened by the first pressing portion 23a of the counter spring 23 is more subsidized than the case where the fastening holes 36A are fastened. The positional relationship is set so that the force is reduced. Similarly, the fastening holes 36B and 36D both correspond to the organ touch state, but the second pressing portion 23b of the counter spring 23 is better when fastened with the fastening hole 36D than when fastened with the fastening hole 36B. The positional relationship is set so that the reaction force due to becomes small.

  Since the presence or absence of inertial force of the hammer body HM can be arbitrarily selected, eventually, in a keyboard device having the hammer body HM, the static load at the time of key depression can be easily and greatly adjusted regardless of the presence or absence of inertial force. Is possible.

  In this modification, the assisting force by the counter spring 23 can be adjusted stepwise. However, if a means for fixing the rotation operation unit 34L at an arbitrary rotational position is provided, stepless adjustment is possible. .

  Incidentally, in the various embodiments described above, the rear end portion 10a of the key 10 may be directly pressed by the counter spring 23. Moreover, the location to be pressed should just be a part ahead of the key fulcrum Pk.

  Further, the second pressing portion 23b is slightly ahead of the first pressing portion 23a with respect to the engagement position between the counter spring 23 and the key 10, but the front / rear position may be reversed or substantially You may comprise so that it may become the same. The spring constant of the counter spring 23 can be changed by setting the positions of the first pressing portion 23a and the second pressing portion 23b in the front-rear direction, and the magnitude of the assisting force and the reaction force can be set as desired. .

  In addition, when making the base 21 change to a 1st state and a 2nd state, the base 21 was rotational displacement, However, It is not restricted to this. As long as it is a structure which can change the positional relationship of the counter spring 23 with respect to the upward contact part 12 and the downward contact part 18a, the structure with a parallel displacement may be sufficient, for example.

  In the present embodiment, the hammer body HM is provided. However, even in a keyboard device that does not have the hammer body HM, a configuration in which the reaction force by the counter spring 23 and the auxiliary force can be switched may be applied. The base portion 21 may be configured so as to be able to take an intermediate state between the first state and the second state, and is particularly useful in a keyboard device that does not have the hammer body HM. In the key pressing process, the counter spring 23 may be in a state where it does not come into contact with either the upward contact part 12 or the downward contact part 18a. By doing so, the adjustment range of the static load is greatly expanded in a touch like an organ, and finer adjustment is possible.

  By the way, the counter spring 23 is configured to bend in the form of a cantilever beam starting from the position of the cantilever support from the base portion 21 when it is bent in any direction. However, the present invention is not limited to this, and the fulcrum may be changed depending on the bending direction as shown in FIG.

  4A to 4C are schematic side views of a link structure 20 according to a modification. In the first modification shown in FIGS. 4A and 4B, an upward midway fulcrum 19 fixed to the base 21 is provided. When the base portion 21 is in the first state (FIG. 1A), the counter spring 23 bends upward, so that the midway fulcrum 19 does not engage with the counter spring 23 (FIG. 4A).

  However, when the base portion 21 is in the second state (FIG. 1B), the counter spring 23 bends downward, so that the counter spring 23 engages the midway fulcrum 19 at a midway position in the extending direction. Then, the counter spring 23 is not a mere cantilever beam but a beam that receives a concentrated load upward at the midway fulcrum 19. Therefore, as compared with the configuration of FIG. 1, the assisting force is not changed, but the key pressing reaction force by pressing the downward contact portion 18a is increased.

  Moreover, in the 2nd modification shown in FIG.4 (c), the midway fulcrum 19 is provided downward. In this configuration, when the base 21 is in the second state (FIG. 1B), the configuration of FIG. 1 is not different, but when the base 21 is in the first state (FIG. 1A), Since the counter spring 23 bends upward, the counter spring 23 engages with the midway fulcrum 19 at a midway position in the extending direction. Therefore, the operation is opposite to that of the first modification (FIGS. 4A and 4B), and the key pressing reaction force is not changed compared to the configuration of FIG. 1, but the upward contact portion 12 is pressed. The subsidizing power by doing will increase.

  The counter spring 23 can also be disposed below the key 10. In that case, a member corresponding to the upward contact portion 12 and a member corresponding to the stopper member 18 are both fixed to the lower surface of the key 10, and a counter spring 23 is interposed therebetween.

  Although the present invention has been described in detail based on preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms within the scope of the present invention are also included in the present invention. included.

  10 key, 12 upward contact part, 18a downward contact part, 21 base part (support part), 23 counter spring (elastic member), 23a first pressing part, 23b second pressing part, 34 rotation operation part (Switching means), Pk key fulcrum, Ph hammer fulcrum, HM hammer body

Claims (5)

On the front side of the key fulcrum, an upward contact portion that faces upward and a downward contact portion that is positioned above the upward contact portion and faces downward are fixedly provided. A key that rotates in the direction of pressing and releasing keys around
A support portion whose position or posture is variable at least between the first state and the second state;
An elastic member that is cantilevered and supported in the vertical direction by the support part;
When the support portion is in the first state, the elastic member is elastically bent in the key-pressing process, and comes into contact with the upward contact portion from above, so that the key is attached in the key-pressing direction. When the supporting portion is in the second state, the elastic member is elastically bent during the key pressing stroke, and the downward pressing force is applied. A keyboard device, wherein the keyboard device is configured to abut against the contact portion from below, and the key is urged in the key releasing direction so that a reaction force is applied to the key pressing force.   A hammer that is provided corresponding to the key and that is driven by the corresponding key to rotate about the hammer fulcrum in conjunction with the key to give inertia to the rotation operation of the corresponding key. Body and switching means for switching the rotation position of the hammer body in a non-key-pressed state by operation, and the operation of the switching means does not drive the hammer body to a drive position driven by a corresponding key. 2. The keyboard device according to claim 1, wherein the keyboard device can be switched to a non-driving position.   The position or posture of the support portion is switched in conjunction with the operation of the switching means. When the hammer body is located at the drive position, the support portion is in the first state, and the hammer body is The keyboard device according to claim 2, wherein the support portion is in the second state when located in the non-driving position.   4. The keyboard apparatus according to claim 3, wherein the static load at the time of key depression is substantially the same when the hammer body is located at the driving position and when the hammer body is located at the non-driving position.   The support portion can take a middle state between the first state and the second state, and the elastic member moves the upper contact portion and the lower contact portion in a key pressing process. The keyboard device according to claim 1, wherein the keyboard device can be in a state of not contacting any of the parts.

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