JP3680686B2 - Keyboard device - Google Patents

Description

[0001]
[Field of the Invention]
The present invention relates to a keyboard device including a mass body that is supported by a mass body support unit and that rotates by receiving a driving force from a key by a key pressing operation.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known a keyboard device that supports a rotating member such as a key or a mass body so that the rotating member does not fall off during rotation.
[0003]
For example, in a keyboard device described in Japanese Patent No. 2571716, a key as a rotating member is supported by a keyboard frame via a key support member. The key is provided with a rotation fulcrum abutting portion and the key support member is provided with a rotation fulcrum portion, and each cross-sectional shape of the rotation fulcrum abutting portion and the rotation fulcrum portion is an arc of 180 ° or more having a notch, Both radii of curvature are approximately the same. Then, at the angle at which the relative angle between the key and the key support member is outside the key pressing operation range, the rotation fulcrum abutting part and the rotation fulcrum part are fitted using the notch and the key pressing is performed. Within the operation range, the two cannot be separated from each other, and the key support member is disposed on the keyboard frame in the fitting groove in a state where the two cannot be separated. As a result, the key is supported rotatably by the key pressing operation without falling off the keyboard frame.
[0004]
In addition, in order to hold the mass body as a rotating member without dropping, the rotating fulcrum portion on the rotating member side and both rotating fulcrum portions on the supporting member side are rotated outside the key pressing operation range. There is also known a keyboard device that can be engaged and disengaged at an angle but cannot be disengaged at a rotation angle within a key pressing operation range.
[0005]
[Problems to be solved by the invention]
However, in the above-described conventional keyboard device, the key must first be fitted to the key support member and fixed to a rotation angle that cannot be separated, and then attached to the keyboard frame. There was a problem that it was not easy to remove because the process was followed. In particular, when a retaining member is provided in order to prevent the key support member from falling off the keyboard frame, the attaching / detaching operation of the retaining member is added. There was also a problem of increasing complexity.
[0006]
Further, in the conventional keyboard device, when the mass body is rotatably supported, an abutting member such as a hammer stopper for regulating the rotation end position of the mass body is generally provided. However, the mass body can be attached to and detached from the mass body support member only at a rotation angle outside the key pressing operation range. The mass body must be attached and detached without the contact member attached. For this reason, the order of attachment and detachment with the contact member must be taken into consideration, and in particular, the removal of the mass body involves the operation of removing the contact member, and there is a problem that the attachment and detachment operation is complicated.
[0007]
The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to facilitate the assembly and removal of the mass body with a simple configuration while ensuring the rotation without dropping of the mass body. An object of the present invention is to provide a keyboard device that can be used.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a keyboard apparatus according to claim 1 of the present invention includes a key to be pressed, a key support unit that rotatably supports the key, a mass body having an engagement portion, A mass body support unit that has an engaging portion and supports the mass body so as to be rotatable about the engaging portion by engaging the engaging portion of the mass body with the engaged portion; The key is configured to be detachable from the key support unit, and when the key is attached to the key support unit, the mass body can be rotated by receiving a driving force from the key by a key pressing operation. The engagement of the engaging portion of the mass body and the engaged portion of the mass body supporting unit is prevented from being released, while the weight of the mass body is removed when the key is removed from the key supporting unit. The mass body engaging portion and the mass body supporting unit engaged portion are rotated by And the mass body is located can be unlocked position of engagement, characterized by being configured as a removable said mass body by moving the mass in this position from the mass body support unit .
[0009]
According to this configuration, the mass body rotates around the engaging portion by engaging the engaging portion of the mass body with the engaged portion of the mass supporting unit. When the mass body can be rotated by receiving a driving force from the key by a key pressing operation by attaching a key to the key support unit, the engagement portion of the mass body and the engaged body of the mass body support unit Since the release of the engagement with the portion is prevented , the engagement between the engagement portion and the engaged portion is released in the state where the key support unit and the mass body support unit are assembled (during normal use). There is nothing. On the other hand, when the key is removed from the key support unit, the engagement between the engaging part of the mass body and the engaged part of the mass body supporting unit is released by the rotation of the mass body due to its own weight. The mass body is located at a possible position, and the mass body can be detached from the mass body support unit by moving the mass body at this position. Therefore, the mass body can be pivotally supported just by assembling the key support unit and the mass body support unit, and at the same time the mass body is prevented from falling off. This mechanism is unnecessary and the configuration becomes simple. Therefore, it is possible to facilitate the assembly and removal of the mass body with a simple configuration while securing the rotation without dropping the mass body.
[0010]
In addition, what is necessary is just to comprise the engaging part of the said mass body and the to-be-engaged part of the said mass body support unit as follows, for example. That is, one of the engaging portion of the mass body and the engaged portion of the mass body supporting unit is an oval shaft portion in which two axisymmetric arcs are cut from the circular axis (or one from the circular shaft). The other of the engaging portion of the mass body and the engaged portion of the mass body supporting unit is from a hole having a diameter substantially equal to the arc portion of the shaft portion. It is configured so as to have a notch-shaped hole part in which an arc having a size enough to allow the trunk of the shaft part to pass therethrough is provided. In this case, in order to engage the engaging portion of the mass body and the engaged portion of the mass body supporting unit, the trunk of the shaft portion is formed on the arc portion of the notched circular hole portion. Let it pass. Thereafter, by relatively rotating the engaging portion and the engaged portion, the engagement is maintained without detachment of both. Therefore, engagement and release thereof are facilitated with a simple configuration.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
FIG. 1 is a partial longitudinal sectional view of a keyboard apparatus according to an embodiment of the present invention. In the figure, the upper case and the lid are omitted. Hereinafter, the player side (left side in the figure) of the keyboard apparatus is referred to as the front, and the rear end direction (right side in the figure) as viewed from the player is referred to as the rear.
[0015]
The apparatus is configured as an electronic keyboard instrument, for example, and a seesaw type key 1 (white key 1W and black key 1B) that is depressed, a mass support member 20 (mass support unit), and the support member 20 And a mass body 40 that is rotatably supported by the key 1 and that is driven by the key 1 to rotate. The mass body 40 is provided corresponding to each of the white key 1W and the black key 1B, and is configured similarly except for mass distribution and the like. The support member 20 is configured, for example, every octave (FIG. 2).
[0016]
A key frame 10 (key support unit) is provided on the shelf 2. A key support portion 3 is provided on the key frame 10, and a fulcrum pin 6 (white key fulcrum pin 6 W, black key fulcrum pin 6 B) is provided on the key support portion 3 so as to protrude corresponding to each key 1. Yes. Each key 1W, 1B is provided with fulcrum holes 1Wa, 1Ba, respectively. Each of the fulcrum holes 1Wa and 1Ba is reduced in diameter toward the lower side. When each key 1 is assembled to the keyboard device body (attached to the shelf 2 via the key frame 10), the fulcrum pin 6 passes through the fulcrum holes 1Wa and 1Ba. The position in the longitudinal direction of the key is restricted, and each key 1 is supported by the key support portion 3 so as to be rotatable in the direction of pressing and releasing keys. Foamed urethane is attached to the upper surface of the rear end portion of each key 1, and a tape that is easy to slide is attached to the upper surface. The portion to which the elastic body made of urethane foam and tape is attached functions as a drive unit 9 that drives the mass body 40 by abutting with a sounding position adjusting screw 41 of the mass body 40 described later. The contact is made smooth without chattering by the elastic body.
[0017]
At the front of the key frame 10, there are a key pressing stopper 4 (white key pressing stopper 4W, black key pressing stopper 4B) and a key guide 5 (white key key guide 5W, black key key guide 5B). It is provided for each key 1. The key pressing stopper 4 abuts on the key 1 and regulates the rotation end position of the key pressing of the key 1. The key guide 5 suppresses swinging in the key arrangement direction when the key 1 is rotated.
[0018]
A switch board 7 is provided behind the key pressing stopper 4 and the key guide 5 on the key frame 10 and in front of the key support portion 3. The switch board 7 has a first key switch for each key 1. 8 is provided. The first key switch 8 detects a key pressing operation.
[0019]
The mass body support member 20 is provided in the vicinity of the rear end portion of the key 1 on the shelf board 2. A non-key-pressing stopper 21 is provided for each key 1 at the front portion of the support member 20, and the non-key-pressing stopper 21 abuts against the key 1 to start pressing the key 1 ( 1), that is, the position when the key is not pressed is restricted. At the rear part of the support member 20, a mass body stopper 22 is provided for each mass body 40. The mass body stopper 22 abuts on the abutting portion 44 of the mass body 40 (the mass body abutted portion), regulates the end position of the rotation of the mass body 40 accompanying the key depression, and has a buffering function. Fulfill.
[0020]
The support member 20 is further provided with a switch substrate 23. The switch board 23 corresponds to the plurality of support members 20, for example, is provided corresponding to all keys, and is fixed to the support member 20 with screws 24. A second key switch 25 is provided for each mass body 40 on the switch board 23. The second key switch 25 is pressed by the mass body 40 and mainly detects the key release operation of the key 1 indirectly. In the present embodiment, the configuration mode is configured to enable various musical tone control by a predetermined algorithm based on the detection results of both the first key switch 8 and the second key switch 25. However, the musical tone control may be performed based on the detection result by either the key switch 8 or the second key switch 25.
[0021]
FIG. 2 is a plan view of the support member 20 as viewed from above. 3 is a cross-sectional view taken along line AA in FIG. 2 and 3 show a state in which the key 1, the mass body 40, and the like are not attached.
[0022]
As shown in FIGS. 2 and 3, the support member 20 is provided with a shaft support portion E for supporting each mass body 40 corresponding to each mass body 40. The shaft support portion E is configured in a space surrounded by the side wall portions 34, the partition wall portions 35, and the floor portion 36 at the rear of the front wall portion 33, and has a rotating shaft portion 32 (an engaged portion). The front wall portion 33, the side wall portion 34, the partition wall portion 35, the floor portion 36, and the rotating shaft portion 32 are formed integrally with the support member 20 by molding using a mold.
[0023]
As shown in FIG. 2, the rotation shaft portion 32 is configured such that a left protrusion 32 </ b> L and a right protrusion 32 </ b> R project inward from both side walls 34. As shown in FIG. 3, the protrusions 32L and 32R have an oval shape that is long in the vertical direction, in which two axisymmetric arcs are cut out from a circular axis. Arc portions (32La, 32Lb, 32Ra, 32Rb) that fit into a missing circle R of a bearing portion 45 (engagement portion) of the mass body 40 to be described later are formed on the upper and lower portions of the protrusions 32L, 32R. The diameters of the arc portions 32a and 32b are set to be the same as or slightly smaller than those of the missing circle R. Further, the body width in the front-rear direction (left-right direction in the figure) of the protrusions 32L and 32R is formed smaller than the width of the opening Ra (described later) of the missing circle R of the bearing 45, and the protrusions 32L and 32R are the openings. It can pass through Ra.
[0024]
FIG. 4 is a side view showing the configuration of the mass body 40. FIG. 5 is a partially enlarged view (FIG. 5A) and a partial perspective view (FIG. 5B) showing the configuration of the bearing portion 45 of the mass body 40. FIG.
[0025]
The mass body 40 is provided to obtain an appropriate key pressing feeling. As shown in FIG. 4, the mass body 40 includes a front extending portion 40 </ b> A extending forward from the bearing portion 45 and a rear extending portion 40 </ b> B extending rearward from the bearing portion 45. In the mass body 40, a metal such as iron is embedded in the head portion 46 of the front extension portion 40 </ b> A and the tail portion 47 of the rear extension portion 40 </ b> B as a mass for obtaining an appropriate inertial force when the key is pressed.
[0026]
The mass body 40 is set so that the front extending portion 40A is heavier than the rear extending portion 40B. Therefore, after the key 1 is assembled, the key 1 and the mass body 40 are in an interlocking state, always in contact with the drive unit 9 of the key 1 in the non-key-pressed state and the initial key-pressed state. Depending on the key pressing mode, the mass body 40 may be separated from the drive unit 9 of the key 1 in the middle of the key pressing process.
[0027]
An actuator 42 is provided on the lower surface of the rear extension 40B, and the actuator 42 presses the key switch 25 of the support member 20 as the mass body 40 rotates. A contact portion 44 is formed on the lower surface of the rear end portion of the rear extending portion 40B. The contact portion 44 contacts the mass body stopper 22 of the support member 20 by the rotation of the mass body 40.
[0028]
The sound generation position adjusting screw 41 is provided in the extended portion 40A. The sound generation position adjusting screw 41 includes a head portion 41a, an adjusting portion 41b, and a shaft portion 41c, and is attached to the mass body 40 by insert molding, for example, when the mass body 40 is molded by a mold. In the sound generation position adjusting screw 41, the head portion 41a abuts against the driving portion 9 of the key 1 to transmit the driving force generated by the key depression to the mass body 40, whereby the mass body 40 rotates.
[0029]
The head portion 41a of the sound generation position adjusting screw 41 is formed in a curved surface, and the contact point of the key 1 with the drive unit 9 moves smoothly during the rotation stroke, thereby preventing adverse effects on the key pressing feeling. . For example, a plus or minus groove is cut in the adjustment portion 41b (not shown), and the amount of downward protrusion of the head portion 41a can be adjusted by a driver. It is possible to adjust the relationship with the sound generation timing by the detection of the key switch 25.
[0030]
The bearing portion 45 is formed integrally with the mass body 40 and is provided symmetrically on the left and right side surfaces with the same configuration. As shown in FIG. 5, the bearing portion 45 forms a missing circle R composed of an inner peripheral surface 45a and an opening Ra. As described above, the diameter of the inner peripheral surface 45a of the missing circle R is such that the outer periphery of the arc portion (32a, 32b) of the rotation shaft portion 32 (projection portion 32L, 32R) of the support member 20 is fitted. It is formed. The width of the opening Ra of the missing circle R is formed to be smaller than the diameter of the arc portion of the protrusions 32L and 32R, and the protrusions 32L and 32R cannot pass through the opening Ra when fitted to the inner peripheral surface 45a. It is like that. The mass body 40 is rotatably supported by the bearing portion 45 by the rotation shaft portion 32, and thus rotates around the bearing portion 45 as the rotation center when the key is pressed and released. By forming the rotation fulcrum mechanism of the mass body 40 by the oval type rotation shaft portion 32 and the oval bearing portion 45, engagement and release thereof are facilitated with a simple configuration.
[0031]
Of the rotation angle of the mass body 40 corresponding to the outside of the key pressing operation range, at the rotation angle in the counterclockwise direction in FIG. While 32L and 32R can pass through the opening Ra, at the rotation angle of the mass body 40 corresponding to the key pressing operation range (the rotation range from the state of FIG. 1 to the state of FIG. 7 described later), the protrusion 32L , 32R cannot pass through the opening Ra, and the arc notch position in the rotating shaft 32, the arrangement angle of the opening Ra in the bearing 45, and the like are set.
[0032]
A plurality of sliding contact surfaces 45b and lubricant grooves 45c are formed on both side surfaces of the bearing portion 45. The plurality of slidable contact surfaces 45b are all formed flush with each other, and slidably contact the side wall portions 34 of the shaft support portion E of the support member 20 when the mass body 40 is assembled to the support member 20. A lubricant such as grease is applied to the inner peripheral surface 45a and the like.
[0033]
FIG. 6 is a partial cross-sectional view showing a state when the mass body 40 is assembled.
[0034]
Assembly of the mass body 40 to the support member 20 is performed as follows. That is, as shown in the figure, the mass body 40 is lowered from above toward the rotation shaft portion 32 so that the opening Ra of the missing circle R of the mass body 40 faces downward. The protrusions 32L and 32R pass through the openings Ra on both sides. Note that the posture of the mass body 40 at this time is a rotation angle corresponding to the outside of the key pressing operation range by the key pressing after assembly. In the state immediately after the mass body 40 is assembled to the support member 20, the head 46 is lowered, which is substantially the same as the posture when lowered from above. Therefore, at the time of detachment or the like, the protrusions 32L and 32R can be easily disengaged from the bearing portion 45 if they are raised upward while maintaining the posture, that is, the mass body 40 can be removed.
[0035]
After the mass body 40 is lowered from above, the mass body 40 is rotated relative to the rotation shaft portion 32 by an appropriate angle. For example, the mass body 40 is rotated clockwise in FIG. If it is rotated to (rotation start position), the arc portions 32a and 32b of the protrusions 32L and 32R are in sliding contact with the inner peripheral surface 45a of the bearing portion 45, and the protrusions 32L and 32R are engaged with the bearing portion 45. In this embodiment, the mass body 40 is automatically shifted to this engagement maintaining state by the following assembling operation of the key 1.
[0036]
The attachment of the key 1 to the shelf 2 via the key frame 10 is basically performed after the mass body 40 is attached to the support member 20 and the support member 20 is assembled to the shelf 2. Specifically, after fixing the key frame 10 to the shelf 2, the key 1 is placed on the fulcrum pin 6 of the key frame 10, the key 1 is slid on the fulcrum pin 6 and moved backward, and the fulcrum The rear end portion of the key 1 is made to enter under the head 46 of the mass body 40 while allowing the pin 6 to penetrate the fulcrum hole 1Wa (1Ba). The mass body 40 has its head 46 lowered immediately after assembly, but the head 46 is lifted when the rear end of the key 1 sinks below the head 46, so that the key 1 and the mass body 40 are finally 1 is within the key pressing start position shown in FIG. 1, that is, the rotation starting position of the mass body 40 at the time of the key pressing start. In this state, the mass body 40 is rotatably supported by the support member 20.
[0037]
Since the key frame 10 is integrally formed by the front portion 100 supporting the key pressing stopper 4 and the key guide 5 and the key support portion 3 (FIG. 1), the key frame 10 as an assembly is first attached to the shelf 2. The key 1 is attached to the key frame 10 and then the assembly of the support member 20 and the mass body 40 is attached and supported so as to be assembled to the key 1 while temporarily fixing the mass body 40 in the up-turned state. The mass body 40 may be temporarily fixed after the member 20 is fixed to the shelf 2.
[0038]
Note that after the key 1 is assembled to the key frame 10, the key frame 10 may be fixed to the shelf 2. In that case, the key frame 10 may be slid rearward so that each key 1 enters under each mass body 40.
[0039]
FIG. 7 is a partial vertical cross-sectional view of the keyboard device in a key pressing end state.
[0040]
The key frame 10 assembled with the key 1 and the support member 20 assembled with the mass body 40 are properly positioned (predetermined on the shelf plate 2) so that the mass body 40 can be appropriately supported rotatably as described above. After being fixed in the positional relationship), the mass body 40 rotates from the rotation start position (FIG. 1) to the rotation end position (FIG. 7) in conjunction with the key pressing operation of the key 1. As described above, since the protrusions 32L and 32R do not come out of the missing circle R of the bearing part 45 within the key pressing operation range, the engagement between the protrusions 32L and 32R and the bearing part 45 in the entire rotation stroke. Is maintained, and the mass body 40 rotates without being detached from the support member 20. In this sense, the key 1 to the key frame 10 serve to prevent the mass body 40 from falling off.
[0041]
When the mass body 40 is to be removed for maintenance or the like after the key 1 and the mass body 40 are assembled, the key 1 is removed from the key frame 10 or the key frame 10 is removed together with the key frame 10 from the shelf 2 (predetermined position). State other than relationship). As a result, the head 46 of the mass body 40 hangs down under its own weight and assumes the same posture as that immediately after the assembly. Therefore, the mass body 40 can be easily detached from the support member 20 if it is raised upward in that posture. .
[0042]
According to the present embodiment, when the key frame 10 and the support member 20 are arranged in a predetermined positional relationship where the mass body 40 can be rotated by a key pressing operation, the bearing portion 45 and the rotation shaft portion 32 are fitted. The release of the match is prevented. That is, the rotation angle of the mass body 40 corresponding to the outside of the key pressing operation range is a rotation angle that cannot be taken when the key frame 10 and the support member 20 are assembled (during normal use). At the rotation angle of the mass body 40 corresponding to the key operation range, the fitting of the bearing portion 45 and the rotation shaft portion 32 is not released, and the mass body 40 can be removed from the support member 20 without permission. There is nothing. Therefore, in the key pressing operation range, the fitting state between the bearing portion 45 and the rotation shaft portion 32 is maintained, and the mass body 40 is rotatably supported by the support member 20. Secured.
[0043]
On the other hand, if either the key frame 10 or the support member 20 is removed from the shelf 2 or the key 1 is removed from the key frame 10, the mass body 40 has a rotation angle corresponding to the outside of the key pressing operation range. Since the fitting with the rotation shaft portion 32 can be released, the fitting can be easily released.
[0044]
Accordingly, the mass body 40 is rotatably supported only by assembling the key frame 10 and the support member 20, and at the same time the function of preventing the mass body 40 from falling off is achieved. A mechanism dedicated to prevention is not required and the configuration is simplified.
[0045]
Moreover, since the mass body 40 is attached to and detached from the support member 20 by moving the mass body 40 in the vertical direction, the work is easy to do. Further, the mass body is moved in the vertical direction at a rotation angle in the rotation direction in which the contact portion 44 is further away from the mass body stopper 22 as compared with the rotation start position of the mass body 40. The attachment / detachment is possible without questioning which one of the body stopper 22 and the mass body 40 is attached / detached to / from the support member 20 first. For example, the mass body 40 can be removed without removing the mass body stopper 22, which is advantageous in terms of work process. In addition, since it becomes easy to arrange the mass body stoppers 22 on the support member 20 side, the configuration can be simplified.
[0046]
Therefore, it is possible to facilitate the assembly and removal of the mass body with a simple configuration while securing the rotation without dropping the mass body.
[0047]
In the present embodiment, the mass body 40 is moved up and down from the support member 20 so that the bearing portion 45 and the rotation shaft portion 32 can be fitted and released, but the fitting is not possible. Further, the rotation angle at which the fitting can be released is not limited to the angle exemplified above. For example, as long as it is out of the key pressing operation range and the posture of the rotation angle in the rotation direction in which the contact portion 44 moves away from the mass stopper 22, it may be in another direction such as diagonally forward or diagonally backward. Good.
[0048]
Note that the configurations of the bearing portion 45 and the rotation shaft portion 32 are not limited to those illustrated above, and can be engaged and disengaged in a specific relative rotation direction, and can be engaged in another rotation direction. Other arrangements may be adopted as long as it is not possible to cancel the match. For example, the protrusions 32L and 32R are formed in an oval shape in which two axisymmetric arcs are cut out from a circular axis, but instead, they are configured as shaft parts in which one arc is cut out from a circular axis. May be. Alternatively, the bearing 45 and the rotating shaft 32 may be reversed, and an oval shaft may be provided on the mass body 40 side, and an oval bearing may be provided on the support member 20 side.
[0049]
【The invention's effect】
As described above, the keyboard device according to claim 1 of the present invention eliminates the need for a mechanism dedicated to preventing the mass body from falling off, eliminates the mass body from falling off and ensures rotation without dropping the mass body. Assembly and removal work can be facilitated.
[0050]
According to the keyboard device of the second aspect, the mass body can be attached and detached by moving in the vertical direction regardless of whether the mass body is attached to or detached from the abutment portion. Assembly and removal work of the mass body can be facilitated while ensuring.
[Brief description of the drawings]
FIG. 1 is a partial longitudinal sectional view of a keyboard device according to an embodiment of the present invention.
FIG. 2 is a plan view of the support member as viewed from above.
FIG. 3 is a cross-sectional view taken along line AA in FIG.
FIG. 4 is a side view showing a configuration of a mass body.
FIG. 5 is a partially enlarged view (FIG. 5 (a)) and a partial perspective view (FIG. 5 (b)) showing a configuration of a bearing portion of the mass body.
FIG. 6 is a partial cross-sectional view showing a state when the mass body is assembled.
FIG. 7 is a partial longitudinal sectional view of the keyboard device in a key pressing end state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 key, 2 shelf board, 3 key support part, 10 key frame (key support unit), 20 mass body support member (mass body support unit), 22 mass body stopper, 23 switch board, 32 rotating shaft part (covered) (Engagement part) (protrusion part 32L, 32R), 32a arc part, 32b arc part, 33 front wall part, 34 both side wall parts, 35 partition wall part, 36 floor part, 40 mass body, 41 sound generation position adjusting screw, 44 Contact part (contact part of mass body), 45 bearing part (engagement part), 45a inner peripheral surface, 46 head, 47 tail, E shaft support part, R missing circle, Ra opening

Claims (1)

A key to be pressed,
A key support unit that rotatably supports the key;
A mass body having an engaging portion;
A mass body support unit that has an engaged portion, and that engages the engaging portion of the mass body with the engaged portion, thereby supporting the mass body rotatably about the engaging portion; Prepared,
The key is configured to be detachable from the key support unit, the key is mounted on the key support unit, and the mass body can be rotated by receiving a driving force from the key by a key pressing operation. The release of the engagement between the engaging portion of the mass body and the engaged portion of the mass body support unit is prevented, and when the key is removed from the key support unit, By rotating, the mass body is located at a position where the engagement between the engagement portion of the mass body and the engaged portion of the mass body support unit can be released, and the mass body is moved at this position. A keyboard apparatus, wherein the mass body is configured to be removable from the mass body support unit.

Images