JP2001236057A - Keyboard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a keyboard device with which a good and stable key touch feel may be obtained. SOLUTION: A drive part 9 of a key 1 abuts on a sound production position adjusting screw 41 of a mass body 40 and the mass body 40 turns by accompanying key touch operation. The adjusting screw 41 is mounted at the mass body 40 by insert molding in such a manner that a screw thread part 41ca is inserted into the mass body 40 during molding of the mass body 40. The adjusting in a vertical direction is made possible by rotating the adjusting screw 41 after the molding. The angle θ formed by the axis J of the adjusting screw 41 and the top surface (drive part 9) of the key 1 with the front end side (left side in Figure) of the key 1 at the plane orthogonal with the axis of a turning shaft part 32 of a supporting member 20 is so set as to change from a sharp angle to a dull angle in the forward stroke of the key touch and to be made perpendicular during the course of the key touch stroke.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device having a mass driven by a key by a key-pressing operation and rotating in conjunction with the key.

[0002]

2. Description of the Related Art Conventionally, a mass body (hammer body) for obtaining an appropriate key-depressing feel is rotatably supported, and the mass body is driven by a key in accordance with a key-depressing operation and is rotated in conjunction with the key. A known keyboard device is known.

[0003] In this device, for example, a contact body is provided on a mass body, and the contact body comes into contact with a contact surface of a key (for example, an upper surface of a rear end portion) by the weight of the mass body in a non-key pressed state. West,
When the key is depressed, the driving force is transmitted to the mass body via the contact body by the contact surface of the key, and the mass body is rotated in conjunction with the key.

The mass body is formed of, for example, a synthetic resin. In addition, in order to avoid interference between the main body of the mass body and the key during the entire rotation of the mass body and to ensure that the contact body of the mass body and the contact surface of the key abut against each other. As the contact body, for example, a rod-shaped member having a certain length is employed. The rod-shaped member is provided so as to protrude (for example, downward) on a surface of the mass body facing the key, and is configured such that a contact surface of the key comes into contact with a tip of the rod-shaped member.

In some cases, a switch is provided which is depressed by the rotation of the mass body and indirectly detects a key depression operation. In this case, the relationship between the amount of rotation of the mass body and the on-timing of the switch unit is adjusted by adjusting the amount of protrusion by rotating the rod-shaped member, thereby appropriately detecting the key-pressing operation. Can be adjusted.

In such a configuration, for example, a pin-shaped portion is provided in a mold, a pilot hole is formed at a predetermined position of the mass body by the pin-shaped portion during molding by the mold, and a tapping screw (self-tapping) is attached to the rod-shaped member. The rod-shaped member is attached to the mass body by manually screwing the rod-shaped member into the prepared prepared hole as described above.

[0007]

However, in the above-mentioned conventional keyboard apparatus, a hole for projecting the screw-like rod-shaped member is provided at the time of molding with the mold, and a mold including a pin-shaped portion is provided. Since it is necessary to sufficiently consider manufacturing requirements, such as ease of manufacturing and ease of mold removal during molding, the projecting direction of the rod-shaped member and the key contact surface in the completed mass body It was difficult to give due consideration to the relationship between the two.

For this reason, when viewed from the side of the mass body (ie, in a plane perpendicular to the rotation axis), an axis along the projecting direction of the rod-shaped member and a key contact surface are formed at the non-key-pressed position. The acute angle may remain at the acute angle over the end position of the rotation by the key depression. In this case, a part of the driving force received from the contact surface of the key acts on the rod-shaped member as a component force in a direction perpendicular to the axis of the rod-shaped member (for example, the front-rear direction of the keyboard). An excessive bending moment may be generated in the rod-shaped member, which is not preferable for smoothly transmitting the key pressing operation to the mass body. In addition, since the force component in the direction perpendicular to the axis of the rod-shaped member is always generated as the force component in the same direction during the entire stroke of the key depression, the rod-shaped member is deformed by continuously receiving the force in the same direction over a long period of use. Not only is there a risk of damage, disadvantageous in terms of durability, but also there is a risk that the relationship between the amount of rotation of the mass body and the on-timing of the switch will be disrupted due to deformation, etc. there were. In these cases, as a result, there is a problem that the touch of the key is affected, and an unnatural change is likely to occur.

Further, in the above-mentioned conventional keyboard device, since a tapping screw-shaped rod-shaped member must be screwed into a prepared hole of a mass body obtained by molding with a metal mold to an appropriate position later, the number of mounting steps is reduced. And the production cost rises. In addition, in the case of manual operation by a worker, it is difficult to uniformly perform the position, angle, depth, and the like of the rod-shaped member for all of the mass bodies corresponding to all keys. There is also a possibility that the rod or the bar-shaped member may be scratched, bent or damaged, and thus cause variations in quality and performance. Also in this respect, there is a problem that the touch of the key is affected.

Furthermore, when the pilot hole is formed by the pin-shaped portion, the pin-shaped portion is easily broken, so that the molding by the mold is not easy, and the mold has no durability and its life is shortened.
Further, not only is the configuration of the mold complicated, but also the design direction of the mold is limited by the limited direction in which the mold is pulled out. Such a situation not only causes an increase in manufacturing cost, but also results in a reduction in the degree of freedom in designing a mass body for obtaining a better keying feel.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a keyboard device capable of obtaining a good and stable key pressing feeling.

[0012]

According to a first aspect of the present invention, there is provided a keyboard apparatus comprising: a key which is turned by a key depression operation; a rotatably supported mass body; And a contact surface is provided on one of the mass members, and a contact member is protruded on the other of the key and the mass member, and the contact surface provided on the one and the other are protruded on the other with the key depression operation. The mass body is configured to rotate in conjunction with the key through contact with the contact body, and during the rotation process from the other rotation start position to the rotation end position, It is characterized in that the contact surface is configured so that an axis along the projecting direction of the contact body and the contact surface form a right angle on a surface orthogonal to the other rotation axis.

With this configuration, the mass body rotates in conjunction with the key via the contact between the contact surface provided on one of the key and the mass body and the contact body protruding on the other side with the key pressing operation. I do. In the course of the rotation process from the other rotation start position to the rotation end position, an axis along the projecting direction of the abutment body and the abutment surface on a plane orthogonal to the other rotation axis. Form a right angle.

At the time when the axis along the projecting direction of the contact body and the contact surface form a right angle, the contact surface presses the contact body exclusively along the axial direction. There is no component force in a direction orthogonal to the axial direction on a surface orthogonal to the other rotation axis. Therefore, by passing such a state in the middle of the rotation stroke from the other rotation start position to the rotation end position, a force component generated in a direction orthogonal to the axial direction is reduced, and The maximum value of the bending moment generated in the contact body can be reduced, and the bias of the force component in the key pressing stroke can be reduced. As a result, it is possible not only to smoothly transmit the key press operation to the mass body, but also to prevent the adverse effects such as deformation and breakage of the contact body due to continuous receiving of the bending moment in the same direction after long-term use, and durability. Performance can be improved. Also, it prevents the abutment body from coming out of contact with the abutment body due to deformation of the abutment body. Can be avoided.

Therefore, the key pressing operation can be smoothly transmitted to the mass body, and the bias of the bending moment acting on the contact member can be reduced, so that a good and stable key pressing feeling can be maintained for a long period of time.

To achieve the same object, a keyboard device according to a second aspect of the present invention is provided with a key provided with an abutting surface and rotating by a key-pressing operation, and a contacting member, and the key-operating device is provided with the key. A keyboard device comprising a mass that rotates in conjunction with the key when a contact surface comes into contact with the contact body, wherein the contact body has a screw groove portion, and the mass body is At least a part is formed of a resin, and the contact body is formed such that a screw groove portion of the contact body is embedded in a portion of the mass body formed of the resin by insert molding during molding of the mass body. It is characterized by being incorporated.

According to this configuration, the key is rotated by a key pressing operation, and the contact surface provided on the key comes into contact with the contact member provided on the mass body, so that the mass body rotates in conjunction with the key. I do.
Since the contact body is incorporated into the mass body by insert molding when molding the mass body, it is compared with, for example, forming a pilot hole with a pin-shaped part during molding with a mold and then screwing the contact body into this pilot hole. In addition, the mounting work can be simplified. In addition, since the contact body has a thread groove portion and is incorporated so that the thread groove portion is embedded in a portion formed of the resin of the mass body, after the assembly by insert molding, the contact body is rotated by rotating the contact body. The screw groove is guided, so that the amount of protrusion of the contact body can be adjusted.

Therefore, as compared with the case where the contact body is screwed into the preformed hole, not only the process can be simplified and the manufacturing cost can be reduced, but also the contact body, the mass body, or the key can be damaged. There is less fear of bending or damage. Also, for example, if the initial position at the time of assembly by insert molding of the contact body is unified, it becomes easy to perform the position, angle, depth, etc. of the contact body uniformly for all the mass bodies corresponding to all keys, As a result of less variation in quality and performance,
The effect on the key press feeling can be reduced. In addition, the strength of the built-in portion is improved.

Furthermore, since a pin-shaped portion that is easily broken is not required in the mold, molding is facilitated, the durability of the mold is maintained, and a reduction in life can be suppressed. In addition, the complexity of the mold configuration is prevented, and flexibility in mold design can be ensured. As a result, not only can manufacturing costs be reduced, but also freedom in mass body design can be ensured, resulting in better keying. It is easy to get a feel.

Accordingly, the work of assembling the contact body and the adjustment after the assembling are facilitated, and the degree of freedom of the design of the mass body is ensured, so that a good and stable key pressing feeling can be easily obtained at low cost. .

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 are partial longitudinal sectional views of a keyboard device according to an embodiment of the present invention. FIG. 1 shows a non-key pressed state (a state in which a key 1 and a mass body 40 to be described later are at a rotation start position), and FIG. (A certain state). In these drawings, the upper case, the lid, and the like are omitted. Note that
The player side (left side in FIG. 1) of the keyboard device is referred to as front, and the key rear end direction (right side in FIG. 1) as viewed from the player is referred to as rear side.

The present apparatus is configured as, for example, an electronic keyboard instrument, and is a seesaw-type key 1 (white key 1W and black key 1B) operated by key depression, a mass support member 20, and a support member 20.
And a mass body 40 rotatably supported by the key 1 and rotated by being driven by the key 1. The mass body 40 is a white key 1W
And the black key 1B, and each has the same configuration except for mass distribution and the like.

A key frame 10 is provided on the shelf 2. A key support 3 is provided on the key frame 10, and fulcrum pins 6 (white key fulcrum pins 6W and black key fulcrum pins 6B) are provided on the key support 3 so as to correspond to the respective keys 1. I have. The keys 1W and 1B are provided with fulcrum holes 1Wa and 1Ba, respectively. Each of the fulcrum holes 1Wa and 1Ba is reduced in diameter downward. At the time of assembling each key 1 to the keyboard device main body (attaching to the shelf 2 via the key frame 10), the fulcrum pin 6 penetrates the fulcrum holes 1Wa and 1Ba. The position in the key longitudinal direction is restricted, and each key 1 is supported by the key support 3 so as to be rotatable in the key press / release direction. Rubber is adhered to the upper surface of the rear end of each key 1, and a portion to which the rubber is adhered is a sounding position adjusting screw 41 (abutting body) of the mass body 40 described later.
And functions as a drive unit 9 (contact surface) that drives the mass body 40 by contacting the same. The rubber makes the contact smooth without chattering.

At the front of the key frame 10, a key pressing stopper 4 (white key pressing stopper 4W, black key key pressing stopper 4W).
B) and key guides 5 (white key guide 5W, black key guide 5B) are provided for each key 1. The key pressing stopper 4 comes into contact with the key 1 and regulates the rotation end position (FIG. 2) of the key pressing of the key 1. The key guide 5 suppresses the swing of the key 1 in the key arrangement direction at the time of rotation.

A switch substrate 7 is provided on the key frame 10 behind the key press stopper 4 and the key guide 5 and in front of the key support portion 3. Is provided. The first key depression switch 8 detects a key depression operation.

The mass support member 20 is provided near the rear end of the key 1 on the shelf 2. The support member 20
For example, it is configured in units of one octave. At the front of the support member 20, a non-key-pressing stopper 21 is provided for each key 1. The non-key-pressing stopper 21 is brought into contact with the key 1 to start the key 1 pressing. (FIG. 1), that is, the position when the key is not pressed is regulated. At the rear of the support member 20, a mass body stopper 22 is provided for each mass body 40. The mass body stopper 22 contacts the contact portion 44 of the mass body 40,
It regulates the rotation end position (FIG. 2) of the mass body 40 due to the key depression and performs a buffer function.

The support member 20 further includes a switch board 2
3 are provided. The switch board 23 is provided to correspond to the plurality of support members 20, for example, to correspond to all keys.
Is fixed to the support member 20. On the switch board 23, a second key press switch 25 is provided for each mass body 40. The second key depression switch 25 is connected to the mass body 4.
It is depressed by 0 and the key 1 pressing operation is indirectly detected. In this embodiment, the key press switch 8 and the second
Based on the detection results of both of the key press switches 25 of
Although various musical tone controls can be performed by a predetermined algorithm, tone control may be performed based on the detection result of one of the key press switch 8 and the second key press switch 25. .

FIG. 3 is a side view showing the structure of the mass body 40.

The mass body 40 (hammer body) is provided in order to obtain an appropriate key pressing feeling. The mass body 40 includes the support member 2.
The pivot shaft 32 (rotating shaft) is rotatably supported by a bearing 45, and pivots around the bearing 45 when a key is pressed and released.

The mass body 40 includes a front extension 40A extending forward from the bearing 45 and a rear extension 40B extending rearward from the bearing 45. In the mass body 40, a metal such as iron is buried in the head portion 46 of the front extension portion 40A and the tail portion 47 of the rear extension portion 40B as a mass for obtaining an appropriate inertial force when a key is pressed.

In the mass body 40, the front extending portion 40A is set heavier than the rear extending portion 40B. Therefore, after the key 1 is assembled, the key 1 is always in contact with the drive unit 9 of the key 1 in the non-key pressed state and in the initial stage of key pressing, and the key 1 and the mass body 40 are in an interlocked state. The contact between the mass body 40 and the key 1 may be maintained by an elastic member such as a spring or rubber without depending on the weight of the mass body 40. Note that, depending on the key pressing mode, the mass body 40 may be separated from the drive unit 9 of the key 1 during the key pressing forward stroke.

An actuator 42 is provided on the lower surface of the rear extending portion 40B.
With the rotation of 0, the key press switch 25 of the support member 20 is pressed. A contact portion 44 is provided on the lower surface of the rear end of the rear extension portion 40B.
Are formed. The contact portion 44 contacts the mass body stopper 22 of the support member 20 by the rotation of the mass body 40.

The sounding position adjusting screw 41 is provided on the extension 40A. The sound position adjustment screw 41 is attached to the head 41
a, the adjusting portion 41b and the shaft portion 41c are integrally made of metal. The screw portion 41ca is formed near the adjusting portion 41b of the shaft portion 41c, and the cylindrical portion near the head portion 41a of the shaft portion 41c is formed in a cylindrical shape having the same diameter as or slightly smaller than the diameter of the valley of the screw groove portion 41ca. When the head 41a of the sounding position adjusting screw 41 comes into contact with the drive unit 9 of the key 1, the driving force of the key depression is transmitted to the mass body 40, whereby the mass body 40 rotates.

Except for the metal buried in the head 46 and the tail 47, the mass body 40 is made of a synthetic resin and molded by a metal mold. The sounding position adjustment screw 41 is attached to the mass body 40 by insert molding when the mass body 40 is molded. That is, the sounding position adjusting screw 41 is inserted into the cavity of the molding die for molding the mass body 40, and the molten resin is injected and filled into the cavity, whereby the sounding position adjusting screw 41 is incorporated into the mass body 40 as an insert part.

The initial position of the sounding position adjusting screw 41 after molding is set as shown in FIG. That is, the sound generation position adjustment screw 41 penetrates from the upper surface 40a of the extending portion 40A to the neck lower surface 40b between the head portion 46 of the extending portion 40A and the bearing portion 45, and also has a thread groove portion 41ca.
Is inserted so as to be embedded in the mass body 40. Therefore, a female screw corresponding to the screw groove 41ca is automatically formed on the mass body 40 side. Moreover, as described above, the shaft 41
Since the position of c near the head 41a is not larger than the diameter of the valley of the screw groove portion 41ca, when the sound position adjusting screw 41 is rotated, the screw groove portion 41ca is guided by the female screw, and the sound position adjusting screw 41 moves vertically ( The case of the initial position will be described later).

Here, for example, a plus or minus groove (not shown) is formed at the tip of the adjusting portion 41b so that the amount of downward projection of the head portion 41a can be adjusted by a driver. Thereby, the relationship between the amount of rotation of the mass body 40 and the sound generation timing by the detection of the key press switch 25 can be adjusted ex post facto.

Further, the sound generation position adjustment screw 41 is
a penetrates through the neck lower surface 40b, and since the head 41a and the adjusting portion 41b are larger than the diameter of the shaft portion 41c, they do not drop out of the mass body 40 during assembly, adjustment, or the like.

In the present embodiment, the initial position of each mass body 40 after insert molding is set to a depth such that the lower portion of the adjusting portion 41b of the sounding position adjusting screw 41 contacts the upper surface 40a of the mass body 40. You. Accordingly, initially, after the molding, the amount of downward projection of the head 41a of the sounding position adjusting screw 41 is maximum, and can be adjusted only upward.
It goes without saying that the amount of protrusion of the head 41a of the adjustment screw 41 at the initial position should be set to a value larger than the appropriate amount of protrusion assumed after adjustment. By unifying the initial position, the adjustment direction is fixed and the variation of the adjustment amount is suppressed, so that the adjustment is facilitated. In addition, in order to enable adjustment below the initial position, a position where the adjusting portion 41b floats from the upper surface 40a of the mass body 40 after molding is set as an initial position, and the screw groove portion 41 is set.
The length of ca may be set to a sufficient length such that a female screw is formed from the upper surface 40a of the extension portion 40A to the neck lower surface 40b.

The angle of the sounding position adjusting screw 41 is set as follows.

FIG. 4 is a diagram showing a change in the angle between the sound generation position adjusting screw 41 and the drive unit 9 of the key 1. FIG.
FIG. 1B shows a state in which the key is not pressed (FIG. 1), FIG. 2B shows a state in the middle of the key pressing forward stroke, and FIG.

The axis J along the projecting direction of the sounding position adjusting screw 41 and the upper surface of the key 1 (driving unit 9) are shown in FIG. 4, that is, a plane perpendicular to the axis of the rotating shaft 32 of the support member 20 ( For example, on the front surface of the key 1 (left side in the figure), an angle θ is formed. In the present embodiment, the projecting direction of the sounding position adjusting screw 41 is set such that the angle θ changes from an acute angle to an obtuse angle in the key stroke in the forward stroke. Therefore, the angle θ
Is an acute angle when the key is not pressed (FIG. 9A), becomes a right angle during the rotation of the key pressing forward stroke (FIG. 9B), and becomes an obtuse angle at the end of the key pressing forward stroke (FIG. 9A). (C)). Since the angle of the adjusting screw 41 is set in this manner, the direction of the driving force applied from the driving unit 9 to the adjusting screw 41 is prevented from being biased in one direction.

That is, the driving force from the driving section 9 acts as a component force in the direction of the axis J of the adjusting screw 41 and in the direction perpendicular to the axis J (front or rear of the mass body 40). Then, of the component forces, a force component in a direction orthogonal to the axis J is
Since it acts as a bending moment for the adjusting screw 41, if this bending moment is too large, the driving force will not be transmitted smoothly. In addition, if the direction of the bending moment is the same in all the strokes of the key pressing, the adjusting screw 41 may be deformed or damaged due to long-term use, which is disadvantageous in terms of durability. Since the bending moment is generally maximum immediately after the start of key depression or at the end of the key stroke, the angle θ acts on the adjusting screw 41 by setting the angle θ to be a right angle in the middle of the key stroke. The maximum value of the bending moment can be reduced. In addition, the direction of the bending moment can be changed in the middle of key depression, and the bias of the force component can be reduced.

The head 41a of the sounding position adjusting screw 41
Is formed in a curved surface, and the contact point Q of the key 1 with the drive unit 9 moves smoothly during the rotation stroke, thereby preventing the key depression feeling from being adversely affected. In addition, the key 1 and the mass body 40 have separate rotation fulcrums and rotation axes, and abut between the two rotation fulcrums and the rotation shafts (the drive unit 9 and the sounding position adjustment screw 41 are in contact with each other). (Contact), the movement of the contact point Q is further smoothed. That is, with the rotation of the key 1, the head 41a of the adjusting screw 41 acts so as to rotate clockwise in FIG. 4, but the direction of movement of the contact point Q due to this rotation changes the angle of the drive unit 9. Since the direction of movement of the contact point Q is the same (all rightward in the figure), the relative sliding amount between the head 41a of the adjustment screw 41 and the drive unit 9 can be reduced. Therefore, the driving force can be more smoothly transmitted while suppressing the generation of friction.

According to the present embodiment, the adjusting screw 41 is provided on the surface of the support member 20 orthogonal to the axis of the rotation shaft 32.
The angle of the sound generation position adjusting screw 41 is set so that the angle θ formed between the axis J of the key 1 and the drive unit 9 of the key 1 on the front end side of the key 1 becomes a right angle in the middle of the key pressing forward stroke. When the axis J and the drive unit 9 are perpendicular to each other, the drive unit 9 presses the adjustment screw 41 exclusively in the upward direction, so that no rotational moment is generated in the adjustment screw 41. Accordingly, by passing such a state in the middle of the key pressing forward stroke, the maximum value of the force component generated in the direction orthogonal to the line J is reduced,
The maximum value of the bending moment generated in the adjusting screw 41 can be reduced, and the direction of the horizontal component of the driving force applied from the driving unit 9 to the adjusting screw 41 can be prevented from being biased in one direction.

As a result, not only can the key-pressing operation be smoothly transmitted to the mass body 40, but also the sounding position adjusting screw 41 deforms or breaks due to continuous bending moment in the same direction due to long-term use. The adverse effects can be prevented and the durability can be improved. Further, it is possible to prevent the amount of protrusion of the adjusting screw 41 from being changed due to deformation or the like, thereby preventing the contact with the drive unit 9 from being deviated, thereby avoiding adverse effects on the key press feeling and causing unnatural changes. Can be.

Therefore, the keying operation can be smoothly transmitted to the mass body 40 and the bias of the bending moment acting on the adjusting screw 41 can be reduced, so that a good and stable keying feel can be maintained for a long time. .

According to the present embodiment, the sounding position adjusting screw 41 is incorporated into the mass body 40 by insert molding when the mass body 40 is molded. In addition to simplifying the mounting operation and reducing the manufacturing cost as compared with the case where the screw is later screwed in, the worry that the adjusting screw 41 and the mass body 40 are damaged, bent, damaged, and the like is reduced. Also,
Since it is not necessary to form a thin hole for attaching the adjusting screw 41 in advance, a pin-shaped portion that is easily broken in the mold is not required, the molding is easy, the durability of the mold is maintained, and the life is reduced. Can be suppressed. In addition, the complexity of the mold configuration is prevented, and the degree of freedom in the mold design can be ensured. As a result, not only the manufacturing cost can be reduced, but also the degree of freedom in the design of the mass body 40 can be ensured to achieve better pressing. It is easy to obtain a key feel.

Further, since the screw groove portion 41ca is attached so as to be embedded in the mass body 40, a female screw corresponding to the screw groove portion 41ca is automatically formed on the mass body 40 side, and the adjusting screw 41 is rotated. With screw groove 41ca
Is guided by the female screw, and the amount of protrusion can be adjusted.

Further, since the initial position of the adjusting screw 41 is unified, the position, angle, depth, etc. of the adjusting screw 41 can be easily made uniform for all the mass bodies 40 corresponding to all keys, and quality and performance can be easily improved. As a result, the influence on the key press feeling can be reduced. In addition, the strength of the built-in portion is improved.

Therefore, the work of assembling the sounding position adjusting screw 41 and the adjustment after the assembling are facilitated, and the mass body 4 is adjusted.
Therefore, it is possible to easily obtain a good and stable key pressing feeling at a low cost while securing the degree of freedom of design of zero.

The sounding position adjusting screw 41 is not limited to the illustrated structure.

FIG. 5 is a diagram showing another example of the tone generation position adjusting screw.

The sounding position adjusting screw 141 shown in FIG.
The shaft portion 141c is the shaft portion 41c of the sound generation position adjusting screw 41.
This is the same configuration as. The head 141a of the adjusting screw 141 is formed in a curved surface like the head 41a of the adjusting screw 41,
The driving force from the driving section 9 of the key 1 is transmitted to the mass body 40, and a plus or minus groove is provided at the tip of the head 141a for adjusting the amount of protrusion with a driver (not shown). ), Adjustments are made here. Note that a hexagonal hole may be provided in the upper end portion 141b of the adjustment screw 141, or the outer diameter may be formed in a hexagonal shape, and the protrusion amount may be adjusted with a hexagon wrench or a spanner.

The provision of a plus or minus groove in the head 41a, the provision of a hexagonal hole in the adjustment portion 41b, or the formation of a hexagonal outer diameter requires the above-described sounding position adjustment screw 41. Can be similarly applied.

The sounding position adjusting screw 241 shown in FIG.
The shaft portion 241c is the shaft portion 41c of the sound generation position adjusting screw 41.
Further, a plus or minus groove for adjusting the amount of protrusion by a driver is provided in the adjusting portion 41b.
Similarly to the above, it is provided at the tip of the adjustment unit 241b. The lower end 241 a of the adjusting screw 241 is connected to the head 4 of the adjusting screw 41.
1a, it is formed into a curved surface, and transmits the driving force from the driving unit 9 of the key 1 to the mass body 40.

As described above, the sound generation position adjusting screws 41 and 14 are provided.
In order to adjust the amount of protrusion of 1, 241 as long as it can be rotated by a tool or the like, another configuration may be adopted.

In the present embodiment, the sounding position adjusting screw 41 is provided on the side of the mass body 40 and the driving section 9 is provided on the key 1 as a contact surface for contacting the screw.
The sounding position adjusting screw 41 may be provided on the key 1 side, and a contact surface that contacts the key 1 may be provided on the mass body 40 side. Even in such a case, the angle relationship between the contact surface and the sounding position adjusting screw 41 is maintained as described above, and at least a part of the key 1 is formed of resin, and the sounding position adjusting screw is formed on the resin portion. If the screw 41 is insert-molded, the same effect as in the above embodiment can be obtained.

A rubber is stuck to the drive unit 9 so as to perform a buffer function. Instead of or in combination with the rubber, the head 41a of the sound position adjustment screw 41 is formed of an elastic material. For example, the buffer function may be ensured by performing the above operation.

It is sufficient that the portion of the mass body 40 where the sound position adjusting screw 41 is inserted is made of resin.
Not all parts of the mass 40 need be made of resin.

[0061]

As described above, according to the first aspect of the present invention,
According to the keyboard device of (1), the key pressing operation is smoothly transmitted to the mass body, the bias of the bending moment acting on the contact body is reduced, and a good and stable key pressing feeling is maintained for a long time. Can be.

According to the keyboard device of the second aspect, the work of assembling the abutment body and the adjustment after the assembling are facilitated, the degree of freedom of the design of the mass body is ensured, and a good and stable touch of the key is provided. It can be easily obtained at low cost.

[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 (non-key pressed state).

FIG. 2 is a partial vertical cross-sectional view of the keyboard device according to the embodiment (in a state where a key pressing forward stroke has been completed).

FIG. 3 is a side view showing a configuration of a mass body.

FIG. 4 is a diagram showing a change in an angle between a sounding position adjusting screw and a key driving unit.

FIG. 5 is a diagram illustrating another example of a sounding position adjustment screw.

[Explanation of symbols]

1 key, 2 shelf board, 3 key support, 9 drive (contact surface), 10 key frame, 20 mass support member, 25 second key press switch, 32 rotation shaft (rotation axis), 40 mass body (rotating member), 41 sounding position adjustment screw (contact body), 41a head, 41b
Adjusting part, 41c shaft part, 41ca screw groove part,
45 Bearing, J axis

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideki Ishihara 10-1 Nakazawacho, Hamamatsu-shi, Shizuoka F-term in Yamaha Corporation (reference) 5D378 EE01 EE05 EE06

Claims (2)

[Claims] A key that is turned by a key-pressing operation; a rotatably supported mass; and a contact surface provided on one of the key and the mass, and on the other of the key and the mass. A contact body is protruded, and the mass body rotates in conjunction with the key through a contact between the contact surface provided on the one side and the contact body protruded on the other side according to a key pressing operation. In the middle of the rotation process from the other rotation start position to the rotation end position, an axis along the projecting direction of the contact body on a surface orthogonal to the other rotation axis. A keyboard device characterized in that the contact surface forms a right angle. 2. A key provided with a contact surface and rotated by a key press operation, and a contact member provided, and the key contact operation causes the contact surface to come into contact with the contact member to interlock with the key. A keyboard body comprising: a rotating mass body; and the contact body has a thread groove, and the mass body is at least partially formed of resin and formed by molding the mass body. A keyboard device characterized in that the contact body is incorporated so that sometimes the thread groove of the contact body is embedded in a portion of the mass body made of the resin by insert molding.