JP3644382B2 - Keyboard device - Google Patents

Description

[0001]
[Field of the Invention]
The present invention relates to a keyboard device that detects a key operation or the like by driving a driven surface of a switch body having a movable portion having a prone shape like a hook with the driving surface of a driving body.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a keyboard device is known in which a driven surface of a switch body is driven by a driving surface of a driving body to detect a key pressing operation or the like. In this apparatus, for example, a key or a hammer body that rotates in conjunction with the key is used as a driving body (actuator), and the switch-shaped elastic movable portion of the switch portion is driven by a key or the like to perform switching. .
[0003]
FIG. 5 is a diagram showing a switch unit in such a conventional keyboard device. FIG. 4A is an external perspective view of the switch unit, and FIG. 4B is a longitudinal sectional view.
[0004]
The switch unit includes a fixed unit 100 and a movable unit 110. As shown in FIG. 2B, the fixed part 100 includes a substrate 101 and a fixed contact 101M provided on the substrate 101. The fixed contact 101M is a contact pattern having a comb-like shape in plan view.
[0005]
The movable portion 110 is made of an elastic resin, has a skirt portion 111 and bulges upward, and an upper portion thereof is a cylindrical portion (hereinafter referred to as “crown portion 112”). A movable contact 110F for one makeup is provided on the movable portion 110 so as to face the fixed contact 101M.
[0006]
By the key pressing operation, the actuator 120 such as a key (or a hammer body) abuts on the driven surface 112a which is the upper surface (top surface) of the crown portion 112, and the crown portion 112 receives a pressing force. When the crown portion 112 is pressed, the skirt portion 111 is elastically deformed (buckled), and the movable contact 110F comes into contact with the fixed contact 101M, thereby detecting, for example, a key pressing operation.
[0007]
[Problems to be solved by the invention]
However, in general, in the case of the above-described conventional keyboard device, particularly when a contact-type switch is configured, as shown in FIG. 5B, the crown portion 112 is open at the top, but other than that (outer cylinder or bottom) Then, a closed inner space (hereinafter referred to as “hollow portion 112b”) is formed. Further, the driven surface 112a of the crown portion 112 and the driving surface 120a for driving the crown portion 112 of the actuator 120 are usually formed in a flat shape having no step to ensure a smooth contact between them. Both the driven surface 112a and the driving surface 120a are set to be substantially parallel to each other when abutting. For this reason, when the two come into contact with each other, the opening of the hollow portion 112b is closed, and the hollow portion 112b is in a substantially hermetically sealed state, thereby preventing air from entering and leaving the hollow portion 112b.
[0008]
Thereby, when the actuator 120 is driven to press the crown portion 112, for example, when the key is pressed, the air in the hollow portion 112b cannot escape, so that the crown portion 112 is deformed and the movable contact 110F is fixed to the fixed contact 101M. There is a problem that the timing of contact with the switch becomes inappropriate and the detection accuracy of the switch operation deteriorates.
[0009]
Further, not only at the time of driving but also at the time of releasing the pressure when the actuator 120 tries to be separated from the crown portion 112, such as a key release, air has already been pushed out from the hollow portion 112b to some extent. The driven surface 112a is attracted to the driving surface 120a of the actuator 120. For this reason, when the key release operation is repeated, an abnormal noise such as a pecker due to the separation and contact between the two occurs, which is a serious disadvantage for a keyboard device as a musical instrument.
[0010]
Furthermore, the switch unit may be configured to mainly detect the key release operation. In this case, the movable unit 110 should return to the original state by its elasticity after the key release operation. Due to the adsorption action of the driven surface 112a and the driving surface 120a as described above, there is a problem that the timing at which the movable contact 110F is separated from the fixed contact 101M becomes inappropriate and the detection accuracy of the key release operation is deteriorated. In particular, by using the switch part to detect the key release operation, the same relationship as the relationship between the silencer mechanism that suppresses the string with a damper and silences the piano and the silence timing (by vertical position control) is reproduced. In a piano-oriented keyboard device that attempts to realize a piano touch response, the behavior failure of the switch part at the time of key release requiring high accuracy was particularly harmful.
[0011]
On the other hand, in order to eliminate these inconveniences, it is conceivable to provide a slit in the driven surface 112a of the crown portion 112 or to make the driving surface 120a of the actuator 120 rough so as to ensure air inflow of the hollow portion 112b. . However, in this case, not only the configuration is complicated, but also smooth contact between the driven surface and the driving surface is not ensured, and it may be difficult to maintain detection accuracy.
[0012]
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 provide a keyboard device capable of suppressing the generation of abnormal noise and improving the detection accuracy of driving operation with a simple configuration. There is to do.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, a keyboard apparatus according to claim 1 of the present invention is a prone-shaped elastic movable part (71M) disposed on a substrate and a movable surface (82a) having a driven surface (82a). 80) and a movable body (80, 25) provided with a movable contact (80F) facing the fixed contact inside thereof, and a driven body of the elastic movable part of the switch body A keyboard device having a driving surface (1a, 42a) facing the surface and a driving body (1) for driving the elastic movable portion in a state where the driving surface and the driven surface are substantially parallel to each other. Thus, the elastic movable portion is driven by the driving body by the driving surface of the driving body pressing the plurality of small protrusions (84) provided on the driven surface of the elastic movable portion of the switch body. It is characterized by comprising.
[0014]
With this configuration, for example, a driving operation such as a key pressing operation is detected by the fixed contact and the movable contact provided inside the elastic movable portion. The elastic movable portion is driven by the driving body in a state where the driving surface of the driving body and the driven surface of the elastic movable portion of the switch body are substantially parallel. Since the plurality of small protrusions are provided on the, the drive of the elastic movable portion by the driving body is performed by pressing the driving surfaces of the driving body against the plurality of small protrusions.
[0015]
As a result, even when the elastic movable part is covered by the driving surface of the driving body, the gaps between the plurality of small protrusions ensure an air inflow path, and the elastic body is driven by the driving body. In addition, a completely closed space is not generated on the elastic movable part side. Accordingly, the behavior of the elastic movable portion becomes smooth, and the timing at which the movable contact comes in contact with the fixed contact becomes appropriate even in the case of quick repetition of the pressing / releasing key. On the other hand, when the drive is released by the driving body, the driving surface of the driving body can be quickly separated without being attracted to the driven surface of the elastic movable portion, so that an unusual noise such as a pecker due to the contact and separation of both is less likely to occur. Therefore, with a simple configuration, it is possible to suppress the generation of abnormal noise and improve the detection accuracy of the driving operation.
[0016]
According to a second aspect of the present invention, there is provided a keyboard apparatus comprising: a fixed contact disposed on a substrate; and a prone-shaped elastic movable portion formed with a driven surface, which faces the fixed contact on the inside thereof. A switch body including an elastic movable portion provided with a movable contact; and a drive body having a drive surface facing the driven surface of the elastic movable portion of the switch body and driving the elastic movable portion. In the keyboard device, the elastic movable part has a cylindrical part (82) whose upper part is open, and the driven surface is formed in an upper part of the cylindrical part, and an inner space (82b) of the cylindrical part. Is closed except for the upper opening, and the driving surface of the driving body presses a plurality of small protrusions provided on the driven surface of the elastic movable portion of the switch body, so that the driving body The elastic movable part is configured to be driven.
[0017]
With this configuration, for example, a driving operation such as a key pressing operation is detected by the fixed contact and the movable contact provided inside the elastic movable portion. The elastic movable part has a cylindrical part whose upper part is open, the driven surface is formed on the upper part of the cylindrical part, and the inner space of the cylindrical part is closed except for the opening part of the upper part. When the elastic movable part is driven by the body, the upper part of the cylindrical part is covered with the drive surface of the drive body. However, since the driven surface of the elastic movable part of the switch body is provided with a plurality of small protrusions, the drive of the elastic movable part by the driving body presses the plurality of small protrusions against the driving surface of the driving body. Is done.
[0018]
As a result, when the elastic movable part is driven by the driving body, the gap between the plurality of small protrusions secures an air inflow path, and the upper opening of the cylindrical part is completely blocked. There is no possibility that a completely closed space is formed on the elastic movable part side. Accordingly, the behavior of the elastic movable portion becomes smooth, and the timing at which the movable contact comes in contact with the fixed contact becomes appropriate even in the case of quick repetition of the pressing / releasing key. On the other hand, when the drive is released by the driving body, the driving surface of the driving body can be quickly separated without being attracted to the driven surface of the elastic movable portion, so that an unusual noise such as a pecker due to the contact and separation of both is less likely to occur. Therefore, with a simple configuration, it is possible to suppress the generation of abnormal noise and improve the detection accuracy of the driving operation.
[0019]
According to a third aspect of the present invention, there is provided a keyboard device comprising: a switch body having an elastically movable portion in the form of a saddle that has a driven surface; and a drive surface facing the driven surface of the elastically movable portion of the switch body. And a driving device that drives the elastic movable portion, wherein the driving surface of the driving body presses a plurality of small protrusions provided on a driven surface of the elastic movable portion of the switch body. Thus, the elastic movable portion is driven by the driver, and a key release operation is detected through driving of the elastic movable portion by the driver.
[0020]
With this configuration, the driver body drives the elastically movable portion of the switch body in the switch body, and the key release operation is detected through the drive of the elastically movable portion by the driver body. At that time, since the plurality of small protrusions are provided on the driven surface of the elastic movable portion of the switch body, the drive surface of the driving body presses the plurality of small protrusions when the elastic movable portion is driven by the drive body. Is done.
[0021]
As a result, even when the elastic movable portion is covered by the driving surface of the driving body, the gaps between the plurality of small protrusions ensure an air inflow path. When the drive is released, a completely closed space is not generated on the elastic movable part side. Therefore, the driving surface of the driving body and the driven surface of the elastic movable portion are not attracted, and after the key release operation, the elastic movable portion basically returns to its original state due to its elasticity. Therefore, the behavior of the elastic movable portion becomes smooth, and the timing at which the movable contact is separated from the fixed contact is appropriate even when the key is repeatedly pressed quickly, so that the key release operation can be appropriately detected. In addition, since the adsorption action between the driving surface and the driven surface is small, it is difficult to generate an abnormal noise such as a pecker due to the separation and contact between the two. Therefore, with a simple configuration, it is possible to suppress the generation of abnormal noise and improve the detection accuracy of the key release operation.
[0022]
In the above claims, it is preferable to provide three or more small protrusions radially on the driven surface, and it is particularly preferable to provide the small protrusions at equal intervals. Thereby, a driving force is appropriately transmitted without tilting the elastic movable part.
[0023]
In each of the above claims, the driver may be a key, for example, and the key may be a wooden key. Since the air release mechanism is configured on the driven surface side, it is not necessary to provide the air release mechanism with the key lower surface or the actuator portion rough, and a configuration with a uniform width along the key longitudinal direction is easy to use. In this way, it is also suitable for wooden manufacture, and it is easy to ensure the accuracy of the key and to simplify the configuration.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0025]
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.
[0026]
This apparatus is configured as, for example, an electronic keyboard instrument, and is operated by a seesaw type key 1 (driving body) (white key 1W and black key 1B) to be pressed, a mass body support member 20, and a support member 20. And a mass body 40 that is rotatably supported and 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 each octave, for example.
[0027]
A key frame 10 is provided on the shelf board 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. A rubber is affixed to the upper surface of the rear end portion of each key 1, and the portion where the rubber is affixed comes into contact with a sounding position adjusting screw 41 of the mass body 40 described later to drive the mass body 40. Function as.
[0028]
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.
[0029]
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 (switch body) is provided. The first key switch 8 detects the key release operation of the key 1.
[0030]
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 part of the support member 20, and the non-key-pressing stopper 21 abuts against the key 1 to start the key depression of the key 1. (FIG. 1), that is, the position when the key is not pressed is regulated. 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, restricts the end position of the rotation of the mass body 40 accompanying the key depression, and fulfills a buffer function.
[0031]
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 (switch body) 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 indirectly detects the key pressing operation of the key 1.
[0032]
The mass body 40 is provided to obtain an appropriate key pressing feeling. The mass body 40 is rotatably supported by the rotation shaft portion 32 of the support member 20.
[0033]
The mass body 40 includes a front extending portion 40A extending forward from the bearing portion 45 and a rear extending portion 40B extending rearward from the bearing portion 45. 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.
[0034]
An actuator 42 (driving body) 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.
[0035]
A sound generation position adjusting screw 41 is provided in the extended portion 40A. The head portion 41a, which is the lower end portion of the sound generation position adjusting screw 41, abuts against the driving portion 9 of the key 1 when the key is pressed to transmit the driving force generated by the key pressing to the mass body 40, whereby the mass body 40 rotates. .
[0036]
FIG. 2 is a block diagram showing a functional configuration for realizing musical tone generation in the keyboard device of the present embodiment.
[0037]
The second key switch 25 is connected to a key pressing event detection unit 51 and a key pressing touch detection unit 52, and the key pressing event detection unit 51 and the key pressing touch detection unit 52 are connected to a key-on music generation unit 55. On the other hand, the first key switch 8 is connected to the key release event detection unit 53 and the key release touch detection unit 54, and the key release event detection unit 53 and the key release touch detection unit 54 are connected to the key-off musical sound generation unit 56. Yes. The key-on tone generator 55 and the key-off tone generator 56 are connected to a sound system (SS) 58 via a mixing unit (MIX) 57.
[0038]
As will be described later, each of the second key switch 25 and the first key switch 8 is a two-make type, and the second key switch 25 detects not only a key-on event but also a touch (on velocity). The The first key switch 8 detects not only a key-off event but also a touch (off velocity).
[0039]
In such a functional configuration, a key pressing event (key on event) and a key pressing touch (on velocity) are detected by the key pressing event detection unit 51 and the key pressing touch detection unit 52 based on the output signal of the second key switch 25, respectively. These detection signals are input to the key-on musical tone generator 55. On the other hand, a key release event (key off event) and a key release touch (off velocity) are detected by the key release event detection unit 53 and the key release touch detection unit 54 based on the output signal of the first key switch 8, respectively. A signal is input to the key-off musical sound generator 56. Then, a sound is generated by the sound system 58 based on the sound generation instruction signal input from the key-on music generation unit 55 via the mixing unit 57. On the other hand, the sound system 58 is muted based on the muting instruction signal input from the key-off musical sound generating unit 56 through the mixing unit 57.
[0040]
In this way, when the key 1 is pressed, the second key switch 25 detects it and performs a sound generation process. When the key is released, the first key switch 8 detects it and performs a mute process.
[0041]
FIG. 3 is an exploded perspective view of the first key switch 8. In the figure, two adjacent first key switches 8 are shown, but the other first key switches 8 are similarly configured. FIG. 4 is a longitudinal sectional view of the first key switch 8.
[0042]
Each first key switch 8 includes a movable part 80 (elastic movable part) and a fixed part 70. The movable part 80 is formed in a hooked-up shape with an elastic synthetic resin integrally with the movable contact sheet 83 which is a base body. The fixed portion 70 includes a substrate 7 and a fixed contact 71 </ b> M provided on the substrate 7. The first key switch 8 is manufactured by sticking the movable contact sheet 83 to the substrate 7.
[0043]
As shown in FIG. 3, the fixed contact 71M includes one makeup and two makeup, the outer pattern is a fixed makeup 71M1 for one makeup, and the inner pattern is a fixed makeup 71M2 for two makeup. The fixed contacts 71M1 and 71M2 are laid as contact patterns having a wave shape and a comb tooth shape, respectively, in plan view. The fixed contact 71M1 has one of the wavy lines connected to the ground line LG and the other connected to the line L1. The fixed contact 71M2 has one of the comb-like lines connected to the ground line LG and the other connected to the line L2.
[0044]
As shown in FIG. 4, the movable portion 80 has a skirt portion 81 and bulges upward, and its upper portion is a cylindrical portion (hereinafter referred to as “crown portion 82”). The reason why the crown portion 82 is cylindrical is to fulfill a function as a buffer body for the switch operation. On the inner side of the movable portion 80, a movable contact 80F1 for 1 makeup is provided to face the fixed contact 71M1, and a movable contact 80F2 for 2 makeup is provided to face the fixed contact 71M2. When viewed from the front (downward), the movable contact 80F1 has a donut shape, and the movable contact 80F2 has a circular shape.
[0045]
The crown portion 82 is open at the top, and the upper surface (top surface) 82a (driven surface) of the crown portion 82 has a donut shape. Since the crown portion 82 has such a shape, an inner space (hereinafter referred to as a “hollow portion 82b”) that is closed except for the upper portion (outer cylinder or bottom portion) that is open is formed in the crown portion 82. .
[0046]
A plurality of (for example, eight) cone-shaped small protrusions 84 are provided on the upper surface 82 a of the crown portion 82. The small protrusions 84 are provided at equal intervals while maintaining an appropriate gap on the entire circumference of the upper surface 82 a, and are formed integrally with the movable part 80. The driving surface 1a of the key 1 is substantially parallel to the upper surface 82a of the crown portion 82 when the key is pressed or released.
[0047]
In this configuration, first, detection of a key pressing operation by the second key switch 25 will be described. Although not shown, the second key switch 25 is configured in the same manner as the first key switch 8. For convenience, the elements corresponding to the first key switch 8 in the second key switch 25 will be described using the same numbers as those of the first key switch 8.
[0048]
When the key 1 is pressed, the mass body 40 is rotated in conjunction with the key 1, and the lower surface 42 a (drive surface) of the actuator 42 comes into contact with the tip of the small protrusion 84. The crown portion 82 receives a pressing force from the actuator 42 through the plurality of small protrusion portions 84, the skirt portion 81 is elastically deformed (buckled), and the movable contact 80F1 comes into contact with the fixed contact 71M1, followed by Thus, the movable contact 80F2 comes into contact with the fixed contact 71M2. The key-on event of the key 1 is detected by the contact of the movable contact 80F2, and the on velocity is detected from the contact time difference between the movable contact 80F1 and the movable contact 80F2.
[0049]
In a conventional switch that does not correspond to the small protrusion portion 84, the actuator 42 presses the upper surface 82a of the crown portion 82. However, in the present embodiment, since the small protrusion portion 84 is interposed, the actuator 42 It abuts on the small protrusion 84 and does not abut on the upper surface 82a of the crown portion 82.
[0050]
Thus, when the movable portion 80 is driven by the actuator 42, the small protrusion 84 is interposed between the lower surface 42 a of the actuator 42 and the upper surface 82 a of the crown portion 82, so that air is released from the gap between the small protrusions 84. It is possible to enter and exit freely, and it is possible to prevent the hollow portion 82b from becoming a closed space that is completely closed. Therefore, an undesirable deformation of the crown portion 82 due to an increase in the internal pressure of the hollow portion 82b is prevented. On the other hand, when the key is released, the lower surface 42a of the actuator 42 and the upper surface 82a of the crown portion 82 are not adsorbed, and the actuator 42 is quickly separated from the crown portion 82. Accordingly, the behavior of the movable portion 80 becomes smooth, the timing at which the movable contact 80F comes into contact with the fixed contact 71M is appropriate, and the detection accuracy of the switch operation is maintained.
[0051]
In addition, since the adsorption action between the lower surface 42a of the actuator 42 and the upper surface 82a of the crown portion 82 is suppressed, the generation of abnormal noise such as a pecker due to the separation / contact of both of them is avoided.
[0052]
Next, the key release operation detection by the first key switch 8 will be described. When the key 1 is depressed, the drive surface 1a of the key 1 comes into contact with the tip of the small protrusion 84. Then, the crown portion 82 receives a pressing force from the actuator 42 through the plurality of small protrusion portions 84, the skirt portion 81 is elastically deformed, the movable contact 80F1 comes into contact with the fixed contact 71M1, and subsequently the movable contact 80F2 Comes into contact with the fixed contact 71M2.
[0053]
When the key is released in this state, that is, the key release operation is performed, the movable contact 80F2 is first separated from the fixed contact 71M2, and then the movable contact 80F1 is separated from the fixed contact 71M1. The key-off waveform is sequentially read out according to the key release curve (envelope) corresponding to the key release speed obtained from the time difference of these separations (contact time difference) using a predetermined table. When the envelope value falls below a predetermined threshold value near 0, all-off is set.
[0054]
Since the small protrusion 84 is interposed between the drive surface 1a of the key 1 and the upper surface 82a of the crown portion 82, air can freely enter and exit from the gap between the small protrusions 84, and the hollow portion 82b is completely closed. It is prevented that it becomes a sealed space. Therefore, during the key release operation, the movable surface 80 can basically return to its original state due to its elasticity after the key release operation without adsorbing the drive surface 1a of the key 1 and the upper surface 82a of the crown portion 82. it can. That is, it always returns at a uniform speed regardless of the key release speed. Therefore, the behavior of the movable portion 80 at the time of key release becomes smooth, and the timing at which the movable contact 80F is separated from the fixed contact 71M is appropriate, so that the key release operation can be detected appropriately. Further, as in the case of the second key switch 25 described above, since the attracting action between the driving surface 1a of the key 1 and the upper surface 82a of the crown portion 82 is small, the two keys are released even when the key is repeatedly pressed. Occurrence of abnormal noises such as squeaks due to contact is avoided.
[0055]
According to the present embodiment, by providing the plurality of small protrusions 84 on the upper surface 82a of the crown part 82, the gaps between the plurality of small protrusions 84 allow the air inflow path between the inside and the outside of the hollow part 82b. Therefore, when the key is pressed and released, the hollow portion 82b does not become a sealed space, that is, a closed space that is completely closed on the movable portion 80 side does not occur, so that the behavior of the movable portion 80 is smooth. Thus, the timing at which the movable contact 80F comes into contact with the fixed contact 71M can be made appropriate even in the case of quick repetition of pressing and releasing keys. Moreover, since the adsorption | suction effect | action of a drive surface and a to-be-driven part is suppressed, generation | occurrence | production of unusual noises, such as a squeak due to separation / contact of both, can also be suppressed.
[0056]
In addition, since the air inflow of the hollow portion 82b can be ensured by the configuration on the movable portion 80 side, it is not necessary to provide the air venting mechanism with the drive surface 1a of the key 1 and the actuator portion being rough, which is suitable for manufacturing in wood. That is, it can be used for the keyboard of an electronic musical instrument without processing any keyboard of an acoustic piano. Furthermore, since the driving surface 1a of the key 1 can be flush with the width along the longitudinal direction of the key, the accuracy of the key 1 can be easily ensured. From these, the configuration can be simplified.
[0057]
In addition, the small protrusion 84 is advantageous in terms of rigidity as compared with the case where a slit or the like is provided on the upper surface 82a of the crown portion 82, and it is easy to ensure smooth contact between the driven portion and the driving surface, so that the driving operation can be performed. Easy to maintain detection accuracy.
[0058]
Therefore, with a simple configuration, it is possible to suppress the generation of abnormal noise and improve the detection accuracy of the key pressing and key release operations.
[0059]
In particular, higher accuracy is required in the detection of the key release operation. However, in the first key switch 8, the small protrusion 84 does not expand or contract by the key release operation, so the movable contact 80F in the stroke direction does not move. The position becomes accurate and high detection accuracy can be realized. This advantage is even greater with repeated key presses.
[0060]
In the present embodiment, the key release operation is detected by the first key switch 8 and the key press operation is detected by the second key switch 25. However, the present invention is not limited to this. For example, both the key pressing and the key releasing may be detected by any one of the first key switch 8 and the second key switch 25. In that case, in the example of FIG. 3, the line L2 may be a key pressing event line and the line L1 may be a key releasing event line. Further, each key switch may be a single make type as long as it does not perform touch detection. In that case, only the set of the movable contact 80F2 and the fixed contact 71M2 is provided, and the line corresponding to the line L2 may be used as a key pressing or key release event line.
[0061]
The configuration in which the small protrusion 84 is provided may be applied only to a switch that detects a key release operation. In addition, the shape of the small protrusions 84 is not limited to the illustrated cone shape as long as air inflow can be ensured by the gap between them. Further, it is preferable to provide three or more small protrusions 84 on the upper surface 82a of the crown part 82, and it is more preferable to provide the small protrusions 84 radially and at equal intervals. Accordingly, the driving force is appropriately transmitted without the crown portion 82 being inclined.
[0062]
【The invention's effect】
As described above, according to the keyboard device of the first aspect of the present invention, it is possible to suppress the generation of abnormal noise and improve the detection accuracy of the driving operation with a simple configuration.
[0063]
According to the keyboard device of the second aspect of the present invention, it is possible to suppress the generation of abnormal noise and improve the detection accuracy of the driving operation with a simple configuration.
[0064]
According to the keyboard device of the third aspect of the present invention, it is possible to suppress the generation of abnormal noise and improve the detection accuracy of the key release operation with a simple configuration.
[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 block diagram showing a functional configuration for realizing musical tone generation in the keyboard device of the present embodiment.
3 is an exploded perspective view of the first key switch 8. FIG.
4 is a longitudinal sectional view of the first key switch 8. FIG.
FIG. 5 is an external perspective view (FIG. 5A) and a longitudinal sectional view (FIG. 5B) of a switch unit in a conventional keyboard device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Key (drive body), 1a Drive surface, 3 Key support part, 7 Switch board, 8 1st key switch (switch body), 10 Key frame, 20 Mass body support member, 23 Switch board, 25 2nd key Switch (switch body), 40 Mass body, 42 Actuator (drive body), 42a Lower surface (drive surface), 70 fixed portion, 71M fixed contact, 80 movable portion (elastically movable portion), 80F movable contact, 82 crown portion (cylinder) ), 82a top surface (driven surface), 82b hollow portion (inside space), 84 small protrusion

Claims (3)

A fixed contact (71M) disposed on the substrate and an elastically movable portion (80) in the form of a saddle that is formed with a driven surface (82a), and a movable contact (80F) facing the fixed contact inside thereof A switch body (8, 25) composed of an elastic movable part provided with
A driving body (1a, 42a) facing the driven surface of the elastic movable portion of the switch body, and driving the elastic movable portion in a state in which the driving surface and the driven surface are substantially parallel. 1) a keyboard device comprising:
The elastic movable part is configured to be driven by the driving body when the driving surface of the driving body presses a plurality of small protrusions (84) provided on the driven surface of the elastic movable part of the switch body. A keyboard device characterized by that. A fixed contact disposed on the substrate, and an elastic movable portion having a sloping saddle shape in which a driven surface is formed, and a movable contact facing the fixed contact is provided on the inside thereof. Switch body,
A keyboard device having a drive surface that opposes the driven surface of the elastic movable portion of the switch body and that drives the elastic movable portion;
The elastic movable part has a cylindrical part (82) whose upper part is open, the driven surface is formed at the upper part of the cylindrical part, and an inner space (82b) of the cylindrical part is an opening part of the upper part. Except for
A configuration in which the elastic movable portion is driven by the driving body when the driving surface of the driving body presses a plurality of small protrusions provided on the driven surface of the elastic movable portion of the switch body. Characteristic keyboard device. A switch body having an elastic movable part in the form of a saddle that has a driven surface;
A keyboard device having a drive surface that opposes the driven surface of the elastic movable portion of the switch body and that drives the elastic movable portion;
When the driving surface of the drive body presses a plurality of small protrusions provided on the driven surface of the elastic movable portion of the switch body, the elastic movable portion is driven by the drive body, and the drive body A keyboard device configured to detect a key release operation through driving of the elastic movable portion.

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