JP3591579B2 - Keyboard device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a keyboard device provided with a mass that is driven by a key by a key pressing operation and that rotates in conjunction with the key.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known a keyboard device which rotatably supports a mass body (hammer body) for obtaining an appropriate key-depressing feel, and which is driven by a key in conjunction with a key-depressing operation and is rotated in conjunction therewith. Have been.
[0003]
In this device, for example, a contact body is provided on a mass body, and in a non-key-depressed state, the contact body is brought into contact with a contact surface (for example, an upper surface of a rear end) of the key by the weight of the mass body and the like. When the key is operated, 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.
[0004]
The mass body is formed of, for example, a synthetic resin. Also, 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 are in contact with 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 portion of the rod-shaped member.
[0005]
In some cases, a switch is provided which is pressed down by the rotation of the mass body and indirectly detects a key-pressing 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, and thereby the detection accuracy of the key press operation is appropriately adjusted. Can be adjusted.
[0006]
In such a configuration, for example, a pin-shaped part is provided in a mold, and a pilot hole is formed at a predetermined position of the mass body by the pin-shaped part during molding by the mold, and the rod-shaped member is formed with a tapping screw (self-tapping screw). The rod-shaped member having such a threading function is configured, and the rod-shaped member is attached to the mass body by manually screwing the rod-shaped member into the prepared hole.
[0007]
[Problems to be solved by the invention]
However, in the conventional keyboard device, when a pilot hole for projecting the screw-like rod-shaped member is provided at the time of molding with a mold, the ease of production of the mold including the pin-shaped portion and the molding time are reduced. Since it is necessary to sufficiently consider manufacturing requirements, such as ease of removal of the mold, sufficient consideration should be given to the relationship between the projecting direction of the rod-shaped member on the completed mass and the key contact surface. It was difficult to pay.
[0008]
Therefore, when viewed from the side of the mass body (that is, in a plane perpendicular to the rotation axis), the acute angle formed by the axis along the projecting direction of the rod-shaped member and the key contact surface at the non-key-pressed position is In some cases, the acute angle may remain over the rotation end position due to key depression. In this case, a part of the driving force received from the contact surface of the key acts on the rod member as a component force in a direction perpendicular to the axis of the rod 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 disadvantageous in terms of durability, but also there is a possibility that the relationship between the amount of rotation of the mass body and the on-timing of the switch unit is degraded due to deformation or the like, due to a change in the adjusted protrusion amount. there were. In these cases, as a result, there is a problem that the touch of the key is affected and unnatural changes are likely to occur.
[0009]
In addition, in the above-mentioned conventional keyboard device, a tapping screw-shaped rod-shaped member must be screwed to an appropriate position afterwards into a prepared hole of the mass body obtained by molding with a mold, so that it takes a lot of man-hours to attach the device. Costs rise. In addition, in the case of manual operation by the operator, it is difficult to uniformly perform the position, angle, depth, etc. of the rod-shaped member for all the mass bodies corresponding to all keys, and furthermore, in the screwing operation, it is difficult to perform the mass body. There is also a possibility that the rod or the bar-shaped member may be scratched, bent or damaged, which causes variations in quality and performance. Also in this respect, there is a problem that the touch of the key is affected.
[0010]
Further, in the formation of the pilot hole by the pin-shaped portion, the pin-shaped portion is easily broken, so that not only the molding by the mold is not easy, but also 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.
[0011]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems of the related art, and an object of the present invention is to provide a keyboard device that can obtain a good and stable key pressing feel.
[0016]
the aboveClaims of the invention to achieve the purpose1The keyboard device is provided with a key provided with a contact surface and rotated by a key-pressing operation, and a contact body, and is interlocked with the key when the key-pressing operation causes the contact surface to contact the contact body. A keyboard body comprising: a rotating mass body; wherein the abutting body has a thread groove, and the mass body is formed at least in part of a resin; The contact body is characterized in that the contact body is sometimes incorporated by insert molding so that a thread groove portion of the contact body is embedded in a portion formed of the resin of the mass body.
[0017]
With this configuration, the key is rotated by the key pressing operation, and the mass body is rotated in conjunction with the key when the contact surface provided on the key comes into contact with the contact body provided on the mass body. 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, the contact body has a thread groove, and the thread groove is embedded in the part formed of the resin of the mass body.IsAfter the assembly by insert molding, the contact groove is guided by rotating the contact body, so that the protrusion amount of the contact body can be adjusted.
[0018]
Therefore, as compared with the case where the contact body is screwed into a preformed hole, not only can the process be simplified and the manufacturing cost can be reduced, but also the contact body, mass body, or key can be damaged, bent or damaged. There is also less worry about giving etc. Also, for example, if the initial position at the time of assembling the contact body by insert molding is unified, it is 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, variations in quality and performance are reduced, and as a result, the influence on the key press feeling can be reduced. In addition, the strength of the built-in portion is improved.
[0019]
Furthermore, since a pin-shaped portion that is easily broken is not required in the mold, molding is facilitated, and the durability of the mold can be maintained and the reduction in the life can be suppressed. In addition, the complexity of the mold configuration is prevented, and the degree of freedom in mold design can be ensured. As a result, not only the manufacturing cost can be reduced, but also the mass body design freedom can be ensured, resulting in better keying. It is easy to get a feel.
[0020]
Therefore, 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 keying feel can be easily obtained at low cost.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0022]
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-depressed 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. Hereinafter, the player side (left side in FIG. 1) of this 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.
[0023]
The present device is configured as, for example, an electronic keyboard instrument, and has a seesaw type key 1 (white key 1W and black key 1B) that is operated to depress a key, a mass supporting member 20, and a rotatably supported by the supporting member 20. And a mass body 40 driven and rotated by the key 1. The mass body 40 is provided corresponding to each of the white key 1W and the black key 1B, and has the same configuration except for mass distribution and the like.
[0024]
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. Each key 1W, 1B is provided with a fulcrum hole 1Wa, 1Ba. Each of the fulcrum holes 1Wa and 1Ba is reduced in diameter downward. At the time of assembling each key 1 to the keyboard apparatus main body (attaching to the shelf board 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 regulated, and each key 1 is supported by the key support 3 so as to be rotatable in the key press / release direction. Rubber is stuck on the upper surface of the rear end portion of each key 1, and the portion to which this rubber is stuck contacts the sounding position adjusting screw 41 (abutment body) of the mass body 40, which will be described later, to attach the mass body 40. It functions as a driving unit 9 (contact surface) for driving. The rubber makes the contact smooth without chattering.
[0025]
At the front of the key frame 10, a key press stopper 4 (white key press stopper 4W, black key press stopper 4B) and a key guide 5 (white key key guide 5W, black key key guide 5B) are provided. It is provided for each key 1. The key press stopper 4 comes into contact with the key 1 and regulates the rotation end position (FIG. 2) of the key press 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.
[0026]
A switch board 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 3, and the switch board 7 has a first key press for each key 1. A switch 8 is provided. The first key depression switch 8 detects a key depression operation.
[0027]
The mass support member 20 is provided near the rear end of the key 1 on the shelf 2. The support member 20 is configured, for example, 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 comes into contact with the contact portion 44 of the mass body 40 to regulate a rotation end position (FIG. 2) of the mass body 40 due to key depression and to perform a buffering function.
[0028]
The support member 20 is further provided with a switch board 23. The switch board 23 is provided corresponding to the plurality of support members 20, for example, corresponding to all keys, and is fixed to the support member 20 by screws 24. On the switch substrate 23, a second key press switch 25 is provided for each mass body 40. The second key depression switch 25 is depressed by the mass body 40 and indirectly detects the key depression operation of the key 1. In the present embodiment, various musical tone controls can be performed by a predetermined algorithm based on the detection results obtained by both the key press switch 8 and the second key press switch 25. Tone control may be performed based on the detection result of one of the switch 8 and the second key press switch 25.
[0029]
FIG. 3 is a side view illustrating the configuration of the mass body 40.
[0030]
The mass body 40 (hammer body) is provided in order to obtain an appropriate key pressing feeling. The mass body 40 is rotatably supported by a bearing part 45 by a rotating shaft part 32 (rotating shaft) of the support member 20, and rotates about the bearing part 45 when a key is pressed and released.
[0031]
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.
[0032]
The mass body 40 is set to be heavier at the front extension 40A than at the rear extension 40B. Therefore, after the key 1 is assembled, the key 1 is always in contact with the driving 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 interlocked. In addition, 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 driving unit 9 of the key 1 during the key pressing forward stroke.
[0033]
An actuator 42 is provided on the lower surface of the rear extending portion 40B, and the actuator 42 presses the key press 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 of the rear extension portion 40B. The contact portion 44 contacts the stopper 22 for the mass body of the support member 20 by the rotation of the mass body 40.
[0034]
The sounding position adjusting screw 41 is provided on the extension portion 40A. The sounding position adjusting screw 41 is made of metal in which the head portion 41a, the adjusting portion 41b, and the shaft portion 41c are integrated. A screw groove 41ca is formed near the adjusting portion 41b of the shaft portion 41c, and a cylindrical shape that is the same as or slightly smaller than the diameter of the valley of the screw groove portion 41ca is formed near the head 41a of the shaft portion 41c. The sounding position adjusting screw 41 has its head 41a in contact with the drive unit 9 of the key 1 to transmit the driving force of the key depression to the mass body 40, whereby the mass body 40 rotates.
[0035]
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 adjusting 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 a molding die for molding the mass body 40, and the cavity is filled with a molten resin, whereby the sounding position adjusting screw 41 is incorporated into the mass body 40 as an insert part.
[0036]
The initial position of the sounding position adjusting screw 41 after molding is set as shown in FIG. That is, the sound generation position adjusting 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 the screw groove portion 41ca is attached to the mass body 40. ImplantationIsIs inserted as Therefore, a female screw corresponding to the screw groove 41ca is automatically formed on the mass body 40 side. In addition, as described above, the head portion 41a of the shaft portion 41c is not larger than the diameter of the valley of the screw groove portion 41ca. Therefore, when the sound position adjusting screw 41 is rotated, the screw groove portion 41ca is guided by the female screw and the sound position is adjusted. The adjustment screw 41 moves up and down (an initial position will be described later).
[0037]
Here, for example, a plus or minus groove is cut (not shown) at the tip of the adjusting portion 41b, and the amount of downward projection of the head portion 41a can be adjusted by a driver. The relationship between the amount of rotation of the body 40 and the sounding timing by the detection of the key press switch 25 can be adjusted afterwards.
[0038]
The sounding position adjusting screw 41 penetrates from the upper surface 40a to the lower surface 40b of the neck, and the head 41a and the adjusting portion 41b are larger than the diameter of the shaft portion 41c. Nothing to do.
[0039]
In the present embodiment, for each mass body 40, the initial position after insert molding is set to a depth such that the lower part of the adjustment portion 41b of the sounding position adjustment screw 41 contacts the upper surface 40a of the mass body 40. Therefore, initially, after molding, the amount of downward projection of the head 41a of the sounding position adjustment screw 41 is maximized and can be adjusted only upward, so the amount of projection of the head 41a of the adjustment screw 41 at the initial position. Needless to say, the value should be set to a value larger than the appropriate projection amount assumed after the adjustment. By unifying the initial position, the adjustment direction is fixed and the variation in 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 length of the screw groove portion 41ca is The length 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.
[0040]
The angle of the sounding position adjusting screw 41 is set as follows.
[0041]
FIG. 4 is a diagram showing a change in the angle between the sounding position adjusting screw 41 and the drive unit 9 of the key 1. FIG. 2A 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. 2C shows a state in which the key pressing forward stroke ends (FIG. 2).
[0042]
The axis J along the projecting direction of the sounding position adjusting screw 41 and the upper surface of the key 1 (the drive unit 9) are shown in FIG. 4, that is, a plane orthogonal to the axis of the rotation shaft 32 of the support member 20 (for example, FIG. In the figure, the angle θ is formed on the front end side (left side in the figure) of the key 1. 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, when the key is not pressed, the angle θ is an acute angle ((a) in the figure), becomes a right angle during the rotation of the key-pressing forward stroke (FIG. (B)), and becomes an obtuse angle at the end of the key-pressing forward stroke. ((C) in the figure). 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.
[0043]
That is, the driving force from the driving unit 9 acts as a component force in the direction of the axis J of the adjusting screw 41 and in the direction orthogonal 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 acts as a bending moment for the adjusting screw 41. If the bending moment is too large, the driving force is not transmitted smoothly. Further, 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 depression forward stroke, the angle θ is set so as to pass through a right angle in the middle of the key depression stroke, and acts on the adjusting screw 41. The maximum value of the bending moment can be reduced. In addition, the direction of the bending moment can be changed during key depression to reduce the bias of the force component.
[0044]
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 driving unit 9 moves smoothly during the rotation stroke, thereby preventing the key touch feeling from being adversely affected. Have been. Further, 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 axes (the drive unit 9 and the sounding position adjusting screw 41 are not 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 adjustment 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.
[0045]
According to the present embodiment, the angle θ formed by the axis J of the adjustment screw 41 and the drive unit 9 of the key 1 on the front end side of the key 1 on the surface orthogonal to the axis of the rotation shaft 32 of the support member 20. Then, the angle of the sounding position adjusting screw 41 was set to be 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 perpendicular to the line J is reduced, and the maximum value of the bending moment generated in the adjustment screw 41 is reduced. It is possible to reduce the size and to prevent the direction of the horizontal component force of the driving force applied from the driving unit 9 to the adjustment screw 41 from being biased in one direction.
[0046]
As a result, not only can the key pressing operation be smoothly transmitted to the mass body 40, but also the adverse effects such as deformation and breakage of the sounding position adjusting screw 41 caused by continuously receiving the bending moment in the same direction due to long-term use are prevented. As a result, 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 abutting relationship with the drive unit 9 from being deviated, thereby avoiding adverse effects on the key press feeling and causing unnatural changes. Can be.
[0047]
Therefore, the key pressing 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 key pressing feeling can be maintained for a long time.
[0048]
Further, 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. Compared to the case of screwing, not only the mounting work can be simplified and the manufacturing cost can be reduced, but also there is less fear that the adjusting screw 41 and the mass body 40 are scratched, bent, broken or the like. Further, 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, and molding is facilitated, and durability of the mold is maintained. As a result, the life can be prevented from being shortened. Further, the complexity of the mold structure is prevented, and the degree of freedom in the mold design can be ensured. As a result, not only the manufacturing cost can be suppressed, 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.
[0049]
Further, the screw groove portion 41ca is embedded in the mass body 40.IsThe female screw corresponding to the screw groove portion 41ca is automatically formed on the mass body 40 side. When the adjusting screw 41 is rotated, the screw groove portion 41ca is guided by the female screw and the protrusion amount is adjusted. Becomes possible.
[0050]
In addition, since the initial position of the adjustment screw 41 is unified, the position, angle, depth, and the like of the adjustment screw 41 can be easily performed uniformly for all the mass bodies 40 corresponding to all keys, and quality and performance variations are reduced. As a result, the influence on the key press feeling can be reduced. In addition, the strength of the built-in portion is improved.
[0051]
Therefore, the sounding position adjusting screw 41 can be easily assembled and adjusted after being assembled, and the degree of freedom of the design of the mass body 40 can be ensured, so that a good and stable key pressing feel can be easily obtained at low cost. .
[0052]
The sounding position adjusting screw 41 is not limited to the illustrated configuration.
[0053]
FIG. 5 is a diagram illustrating another example of the sounding position adjustment screw.
[0054]
The sounding position adjusting screw 141 shown in FIG. 9A has the same configuration as the shaft portion 41c of the sounding position adjusting screw 41 in the shaft portion 141c. The head 141a of the adjusting screw 141 is formed in a curved surface like the head 41a of the adjusting screw 41, and transmits the driving force from the driving unit 9 of the key 1 to the mass body 40. Further, a plus or minus groove for adjusting the protrusion amount with a driver is provided (not shown), and the adjustment is performed here. In addition, 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.
[0055]
Providing a plus or minus groove in the head 41a, providing a hexagonal hole in the adjustment portion 41b, or forming a hexagonal outer diameter requires the above-described sounding position adjustment screw 41 also. The same can be applied.
[0056]
The sounding position adjusting screw 241 shown in FIG. 8B has a shaft portion 241c having the same configuration as the shaft portion 41c of the sounding position adjusting screw 41, and has a plus or minus shape for adjusting the amount of protrusion by a driver. The groove is provided at the distal end of the adjustment unit 241b, like the adjustment unit 41b. The lower end portion 241a of the adjusting screw 241 is formed in a curved shape like the head 41a of the adjusting screw 41, and transmits the driving force from the driving unit 9 of the key 1 to the mass body 40.
[0057]
As described above, in order to adjust the projecting amounts of the sounding position adjusting screws 41, 141, and 241 as long as they can be rotated by a tool or the like, other configurations may be employed.
[0058]
In the present embodiment, the sounding position adjusting screw 41 is provided on the mass body 40 and the drive unit 9 is provided on the key 1 as an abutting surface for contacting the same. The key 41 may be provided on the key 1 side, and a contact surface that contacts the key 41 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.
[0059]
In addition, although a rubber is stuck to the drive unit 9 to perform a buffer function, instead of or in combination with this, the head 41a of the sound generation position adjustment screw 41 is formed of an elastic material or the like. A buffer function may be ensured.
[0060]
It is sufficient that the portion of the mass body 40 into which the sound position adjusting screw 41 is inserted is made of resin, and it is not necessary that the entire portion of the mass body 40 be made of resin.
[0062]
【The invention's effect】
As described above, the present inventionAccording to the method, the work of assembling the abutment 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 feel 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 (in a non-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 illustrating a change in an angle formed 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 adjustment part, 41c shaft part, 41ca screw groove part, 45 bearing part, J axis line

Claims (1)

A key provided with an abutment surface and rotated by a key pressing operation;
A keyboard device provided with an abutting body, and a mass body that rotates in conjunction with the key by bringing the abutting surface into contact with the abutting body by a key pressing operation;
The contact body has a thread groove portion, and the mass body is at least partially formed of resin, and the thread groove portion of the contact body is formed of the resin of the mass body by insert molding at the time of molding the mass body. A keyboard device comprising the contact member incorporated so as to be embedded in a portion formed by:

Images