JP3675727B2 - Electronic musical instrument operation mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an operation mechanism for controlling musical tone elements such as timbre, volume and various effects of musical tone of an electronic musical instrument.
[0002]
[Prior art]
In addition to electronic keyboard instruments such as an electronic organ and synthesizer, there are many types of electronic musical instruments equipped with operating elements (operation keys) such as an electronic drum, a rhythm machine, a sequencer, an electronic wind instrument, and a MIDI controller.
[0003]
For example, a key of an electronic keyboard instrument functions as an operator that generates a sound of a specific pitch, changes the volume and tone of a musical tone during or after the start of sounding, tremolo, vibrato, pan, repeated hits, etc. It may also be used as a control operator for diversifying musical tones that add decorative effects. Unlike the case where a controller or the like is provided separately from the key, simultaneously with the key pressing operation for performance, for example, by adjusting the pressing force, both sound generation and control can be performed, so-called aftertouch control. A variety of performances can be performed. As a mechanism that enables such control, all parallel keys or a plurality of keys in a certain range are used as control operators, and the key pressing pressure at the time of key pressing or after key pressing is detected by a pressure sensor. In many cases, musical tone control according to the key pressing pressure is possible. In these mechanisms, a band-like pressure sensor extending over the parallel width of the control key or its interlocking member is installed at a position to receive the key pressing pressure. The pressure sensor outputs a signal corresponding to the key pressing pressure applied to any one of the control keys, and the control unit controls the musical sound according to the signal.
[0004]
However, since such a band-shaped pressure sensor is usually used with a length ranging from several keys to several tens of keys, there is a problem that the cost and labor of manufacturing and mounting the pressure sensor increase. Therefore, the manufacturing cost of an electronic keyboard instrument using such a pressure sensor has also been increased.
[0005]
On the other hand, an after touch control mechanism having a sensor that acts on a plurality of keys in common has been proposed (Japanese Patent Publication No. 55-35716). The keyboard support frame extending in the key arrangement direction of the keyboard device can be rotated in the vertical direction, a shutter plate is attached to one portion of the support frame, and a shutter is provided between the lamp and the photoconductor attached to the instrument body. The plate is positioned to constitute a sensor mechanism. In this mechanism, when the support frame is rotated by the key depression, the shutter plate is rotated according to the rotation amount and the amount of light reaching the photoconductor from the lamp is changed, so that the volume change according to the key pressing pressure is changed. It is to be obtained. However, in this mechanism, since the support frame extending in the key arrangement direction of the keyboard device is provided, there is a disadvantage that the support frame is always moved when the key is pressed, and the touch feeling becomes heavy, and the manufacturing cost is high.
[0006]
In addition, there has been proposed a switch device including a member that acts in common on a plurality of operating elements (Japanese Patent Laid-Open No. 59-189515). In this device, a plurality of operating elements constitute a slide switch that is slid perpendicularly to the arrangement direction thereof, and interlocking members such as wires and threads extending in the arranging direction of the operating elements are stretched by a spring, and the operating element Is engaged. In this apparatus, when one operation element is slid from the neutral position, the interlocking member is bent in a V shape against the spring force in the sliding direction, and when another operation element is further slid, the movement member is moved. The previous operation element is pulled back to the neutral position. As a result, only one operator can be moved to the slide position, and the structure for selecting the timbre of the electronic musical instrument is simplified. However, since this switch device has only a function of switching on and off by sliding the operation element, it is not suitable for accurate aftertouch control corresponding to the key pressing pressure.
[0007]
In addition, in electronic musical instruments, sound intensity and decoration effects are controlled by operating an operator other than the keyboard, and there is a demand for a mechanism that can perform the operation easily and reliably. is there.
[0008]
[Problems to be solved by the invention]
An object of the present invention is to provide an operating mechanism for an electronic musical instrument that can solve the problems of the conventional techniques and accurately perform aftertouch control and other musical tone control with a simple structure.
[0009]
[Means for Solving the Problems]
To achieve the above object, the present invention provides a movable member that is reciprocated by an external operation, a holding frame that holds the movable member, a tension member supported by the holding frame, and the movable member that is operated. A detecting unit that is provided in the tensioning material so as to detect a change in the longitudinal direction of the tensioning material due to bending caused by contact with the movable member, and outputs a detection value as a musical sound control parameter of the electronic musical instrument; and tension on the tensioning material. An operating mechanism for an electronic musical instrument provided with an elastic member to be provided, wherein the holding frame is provided with two engaging portions apart from a position sandwiching the movable member to be detected, and the tension member is One end is supported by one engaging part, both engaging parts are circulated at least once, and the other end is supported by the engaging part located at the rotating end, and the detection part and the elastic member are either Person in charge An operating mechanism for an electronic musical instrument is provided, characterized in that the tensioning material is provided between a portion and the tensioning member, and the circulating tensioning material is disposed at a position where the tensioning member can come into contact with the movable member ( First invention).
[0010]
In order to achieve the above object, the present invention also provides a movable member that is reciprocated by an external operation, a holding frame that holds the movable member, and an active tension member that is supported by the holding frame at a position in contact with the movable member. A negative tension member supported by the holding frame at a position not in contact with the movable member, a fixed portion that supports one end of the active tension member and the negative tension member on the holding frame, and when the movable member is operated, An amplification mechanism that amplifies the movement of the other end of the active tension member due to bending caused by contact with the movable member and transmits it to the other end of the negative tension member, and a change in the longitudinal direction of the negative tension member due to the transmission. The negative tension member is provided to detect the detected value, and the detected value is used as a musical sound control parameter of the electronic musical instrument. A detection unit for outputting as a meter, it is desirable to provide an electronic musical instrument operating mechanism, characterized in that an elastic member for applying tension to the active Zhang 設材 and negative Zhang 設材 (second invention).
[0011]
In order to achieve the above-mentioned object, the present invention can contact a movable member that is reciprocated by an external operation, a holding frame that holds the movable member, a tension member supported by the holding frame, and the tension member. And an interlocking portion that is coupled to the movable member and that amplifies the operation of the movable member and transmits the amplified motion to the tensioning member, and detects a change in the longitudinal direction of the tensioning material due to bending caused by the operation of the interlocking portion. Provided is an operating mechanism for an electronic musical instrument provided with a detecting unit provided on the tensioning material and outputting a detection value as a musical sound control parameter of the electronic musical instrument, and an elastic member for applying tension to the tensioning material. (Third invention).
[0012]
In order to achieve the above object, the present invention also provides a plurality of movable members reciprocated by a pressing operation and release thereof, a tension member supported by a holding frame and extending in the direction in which the movable members are arranged, and the plurality of movable members. The holding member supported by the holding frame so as to bend slightly by the pressing operation after reaching the deepest part in the reciprocating motion of the movable member, and with the movement of the holding member A detection unit that is provided in the tensioning material so as to detect a change in the longitudinal direction of the tensioning material due to bending that occurs, and outputs a detection value as a musical sound control parameter of the electronic musical instrument; and an elastic member that applies tension to the tensioning material. The holding member is formed with a plurality of pushing protrusions protruding in the moving direction of the holding member at a position in contact with the tension member, It is intended to provide an electronic musical instrument operating mechanism, characterized in that it said has convexity receiving the pushing protrusions and the shift position is provided at a portion for supporting the Sulfur butterfly 設材 (fourth invention).
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, in the several embodiment demonstrated below, the same number is attached | subjected to the part which is the same or the same kind.
[0014]
First, with reference to FIG. 1, the structure of the basic operation mechanism leading to the present invention will be described. FIG. 1 schematically shows an operation mechanism, and the mechanism includes a movable member 1 configured by an operation element or configured to be interlocked with the operation element, and a tension member 2 pressed by the movable member. ing. Throughout the description of the embodiments, a single movable member is shown in the figure for the sake of simplicity, but the present invention is applied when a necessary number of movable parts are provided, and when applied to an electronic keyboard instrument, A large number of keys or a member interlocking with the keys is a movable part. The movable member 1 is provided so as to be able to reciprocate in the direction across the tension member. In the direction crossing the tension member, the y direction that is perpendicular and horizontal to the parallel direction x in the figure, the z direction that is perpendicular to the parallel direction x and vertical, or these y direction and z direction In addition, both the direction including the direction component along the yz plane and the direction including the x-direction component are included.
[0015]
The movable member 1 can be a musical sound operation part of various electronic musical instruments. For example, in addition to the keys of an electronic keyboard instrument, operation keys of an electronic percussion instrument that emits a sound such as a cymbal or a hand clamp by operating a finger or a palm, The electronic wind instrument finger operation keys, foot volume operated by foot, pedals, switches, etc. can be used as multiple operation parts to control the sound, and the operation can be moved by pushing down, pulling up, twisting, etc. Various motions such as linear motion, rotational motion, or a combination thereof can be generated. In addition, the movable member is subjected to a spring force so that the player moves in one direction by applying force to the operation element and then reciprocates by returning to the original position when the force is released. However, the reciprocation may be performed by the player's operation. The movable member includes not only a directly operated part but also a part that operates from a directly operated part via a mechanical or fluid transmission unit such as a link mechanism, a winding mechanism, or a fluid transmission device.
[0016]
The tension member 2 can be composed of various linear bodies such as strings, wires, tapes, coil springs, and the like. As a result of the tension member 2 being engaged with the movable member 1, the tension member 2 bends in various directions according to the moving direction of the movable member 1 or its interlocking member, and elastically restores its position by releasing the operation. Even when a plurality of movable members are operated, the tension member 2 bends according to the moving direction of each movable member or its interlocking member.
[0017]
In addition, when there are a plurality of movable members, the tension member 2 is stretched along the parallel direction. FIG. 2 shows various tensioning forms of the tensioning material when the keyboard of the electronic keyboard instrument is used as an operator. In the illustrated example, for the sake of simplicity, the tensioning material is bent by touching the tensioning material somewhere on the lower surface of the keyboard, thereby performing additional control such as a change in sound quality with respect to the sound produced by the key depression. Suppose that As shown in the drawing, the tension member 2a is shown in a case where it is arranged in parallel with the parallel direction of the movable member. The tension member 2b is inclined with respect to the parallel direction of the movable members, but the tension member 2b is located in a range where the operation of the range A of the movable member for controlling the musical sound can be received. The tension member 2c is parallel to the parallel direction of the movable member, but extends over a range B of the movable member that contributes to musical tone control. As described above, it is desirable that the tensioning direction of the tensioning material is parallel to the parallel direction of the movable member, but even if it is inclined with respect to the parallel direction or the vertical direction, it can bend by receiving the operation of the movable member. Any range within the range may be used. The arrangement in which the movable member parallel direction and the tension member stretching direction are provided in directions other than parallel is an effective means for continuously changing the sensitivity between the high-pitched sound side and the low-pitched sound side. Further, the tensioning range of the tensioning material 2 may be a range that can receive the operation of the movable member 1.
[0018]
Therefore, for example, in an electronic keyboard instrument, when providing a tensioning material that is stretched below the keyboard in the parallel direction of the keys and takes a bending position when the key is pressed, the tensioning material is provided in a direction other than parallel to the key parallel direction. It is possible.
[0019]
This operation mechanism detects the change in the physical quantity of the tension member bent by the movable member by the detection unit 3 and performs the musical sound control. The musical tone to be controlled can be applied to various musical tone control in an electronic musical instrument to which the present mechanism is mounted, such as sound generation, mute timing, volume, tone color, pitch, and panning. Usually, it is intended for the control of musical sounds simultaneously with the sound produced by the operation of the operator or after the start of sound production.
[0020]
In the operation mechanism of FIG. 1, if the tension member 2 is moved by the movement of the movable member 1 and the original length is changed from Mo to Ma, the amount of Mo−Ma is detected by the detection unit 3. . However, it is necessary to detect a very small amount depending on the moving distance of the movable member. For example, when this mechanism is used for after-touch control of an electronic keyboard instrument, it is necessary to detect a change in length due to the displacement of the tension member due to the key pressing pressure applied after the key is pressed. Detection is difficult and an expensive displacement sensor is required to do so. Such difficulty is the same when the movement of the tension member is detected by pressure through a spring. The present invention realizes an operation mechanism capable of detecting a change in the tension member accompanying the movement of the movable member with a simple structure with high accuracy based on the basic mechanism. The embodiment will be described below.
[0021]
FIG. 3 schematically shows an operation mechanism, which is supported by the plurality of movable members 1 reciprocated by a performance operation, a holding frame 4 that holds the movable members, and the holding frame. The tension member 2 is provided. The tension member 2 is provided with a detection unit 3 at one end thereof so as to detect a change in the longitudinal direction of the tension member due to bending caused by contact with the movable member when the movable member 1 is operated. The detection unit 3 is a displacement sensor that detects a displacement associated with a change in the length of the tension member, or a pressure sensor that detects a change in the support force at the support portion caused by a change in the length of the tension member and a tensile force generated by the elastic member 5. For example, various sensors can be used. The detection unit 3 is connected to a control unit 6 including a comparator, an arithmetic device, and the like.
[0022]
The holding frame 4 is provided with an engaging portion 7 apart from a position sandwiching the movable member to be detected, and the tension member 2 is supported at one end by one engaging portion 7a and the other engaging portion. It goes around 7b, reaches the engaging portion 7a again, and is supported at the other end. The other end is supported through a detection unit 3 having a built-in elastic member 5. In this way, the tension member 2 that circulates the engaging portion once is disposed at a position that contacts the movable member 1 when the movable member 1 moves. Note that the tension member may rotate the engaging portion a plurality of times. For this purpose, an engaging portion similar to the engaging portion 7b is placed immediately before the engaging portion 7a, and the intermediate portion is circulated between the engaging portion 7b and the engaging portion 7a. The part may be supported. In addition, a plurality of grooves can be provided in the engaging portion so as to pass through different groove portions for each turn. Even when the tension member is rotated a plurality of times, the circulating tension member is disposed at a position where it can come into contact with the movable member.
[0023]
The operation mechanism of FIG. 3 operates as follows. When the movable member 1 is moved by operating the operating element, the tension member is bent by contacting the tension member 2. Since the tension member 2 is stretched around the engaging portion 7 once, the total amount of bending is approximately twice that of the case where the tension member 2 is not rotated. Accordingly, the longitudinal displacement detected by the detection unit 3 is also approximately doubled. Thus, since a large displacement can be obtained with a simple structure, the error is reduced accordingly, and high accuracy is easily obtained. Even when the deflection of the tension member is sensed by pressure through the spring, the amount of deformation of the spring increases, so that the pressure change also increases. If the number of laps is increased, the amount of change obtained is increased accordingly.
[0024]
FIG. 4 shows another example of the engaging portion that is engaged during the circulation. The engaging portion 7 is configured such that a pulley 71 is rotatably provided on a shaft 70 installed on a holding frame. The tension member 2 rotates by engaging with the pulley 71. Therefore, when the tension member 2 is bent and moves in the longitudinal direction, it can move with a small resistance due to the rotation of the pulley, and an accurate reaction can be obtained. In addition, since a large amount of change can be obtained with a single tension member by the circulation, it is easy to maintain linearity even if the amount of change is large.
[0025]
FIG. 5 shows another example of the operation mechanism. This operation mechanism includes an active tension member 2 a and a negative tension member 2 b supported by the holding frame 4. The active tensioning material 2a is a tensioning material that is in contact with the movable member 1 and generates deflection by the contact, and the negative tensioning material is in a position that does not contact the movable member and receives the propagation of tensile force due to the deflection of the active tensioning material. It is called tension material. One end of each of the active tension member 2 a and the negative tension member 2 b is supported by a fixing portion 40 on the holding frame 4, and the other end is coupled to the amplification mechanism 8 on the holding frame 4. In the amplifying mechanism 8, the active tension member 2 a extends due to the bending caused by contact with the movable member when the movable member 1 is operated, and the movement of the other end moves. The amplification mechanism 8 amplifies the movement of the other end and transmits it to the end of the negative tension member 2b. In this example, the amplifying mechanism 8 is configured such that a rotating body 81 is rotatably attached to a shaft portion 80 installed on the support body 4, and the tension member 2 is connected to both ends of the rotating body 81. When the distance from the rotation center 82 of the rotating body 81 to the active tensioning material 2a is r1, and the distance from the rotation center 82 to the negative tensioning material 2b is r2,
r1 <r2
They are arranged so that The ratio of the rotation radii becomes the lever ratio, and the movement of the connection end with the rotating body 81 due to the extension of the active tensioning material 2a is amplified and transmitted to the movement of the connection end between the negative tensioning material 2b and the rotation body 81. Therefore, the elongation of the negative tension member 2b is amplified, and the detection value by the detection unit 3 is also increased. The amplification factor can be easily set to a desired value by setting the rotation radius to the connection point between the rotating body and the tension member.
[0026]
FIG. 6 shows another example of the amplification mechanism 8. The amplifying mechanism 8 includes a large-diameter first cylinder piston portion 83 supported by a holding frame and connected to the active tension member 2a, and a small-diameter second cylinder piston portion 84 connected to the negative tension member 2b. The two cylinders communicate with each other by a connecting pipe 85, and a space closed by a piston is filled with liquid. When the active tension member 2a is bent by the movement of the movable member, the piston of the first cylinder piston portion 83 is pulled and moves to the cylinder opening side. Due to the movement of the liquid accompanying this, the piston of the second cylinder piston portion 84 moves to the back side of the cylinder. The latter movement increases corresponding to the difference in the size of the diameter of the cylinder piston portion. Therefore, the extension of the negative tension member 2b connected to the second cylinder piston portion 8 is also increased, and the detection amount by the detection unit is increased.
[0027]
FIG. 7 shows still another example of the amplification mechanism 8. The amplifying mechanism 8 includes a first solenoid 86 supported by the holding frame and connected to the active tension member 2a, and a second solenoid 87 connected to the negative tension member 2b. The two solenoids are connected to the amplifier circuit 88. When the power of the first solenoid is input, the amplifier circuit 88 amplifies it and outputs it to the second solenoid. When the active tension member 2a bends due to the movement of the movable member, the plunger of the first solenoid 86 is pulled out, whereby an electromotive force is output from the solenoid. The amplifier circuit 88 amplifies the electromotive force of the first solenoid and outputs it to the second solenoid. The second solenoid generates an electromagnetic force by the transmitted electric power and moves the plunger so as to retract. The amount of movement of the plunger is larger in the second solenoid by the amount amplified by the amplification circuit 88. Therefore, the elongation of the negative tension member 2b connected to the second solenoid 87 is also increased, and the detection amount by the detection unit is increased.
[0028]
FIG. 8 shows still another example of the amplification mechanism 8. The amplifying mechanism 8 is attached to a shaft portion 80 installed on a holding frame so that the first rotating body 91 and the second rotating body 92 can rotate integrally. The second rotating body 92 has a larger diameter than the first rotating body 91. In this example, the active tension member 2a extends from a fixed portion (not shown) on the holding frame 4, is wound around the first rotating body 91, and is connected to the fixed portion again. The negative tension member 2b extends from another fixed portion on the holding frame, is wound around the second rotating body 92, and is connected to the fixed portion again. The movable member is disposed so as to be in contact with only one of the two portions extending from the fixed portion of the active tension member 2a to the first rotating body 91 and not in contact with the negative tension member 2b. The detection part is provided in the negative tension member 2b.
[0029]
When the movable member moves and bends the active tension member 2a, the first rotating body 91 rotates. The second rotating body 92 rotates integrally with the first rotating body 91. Since the diameter of the second rotator 92 is larger than the diameter of the first rotator 91, the negative tension member 2b wound around the second rotator 92 expands and contracts larger than the active tension member 2a. Therefore, the amount of change detected by the detection unit provided in the negative tension member 2b also increases.
[0030]
FIG. 9 shows still another example for amplifying a change in the longitudinal direction of the tension member. The mechanism for amplification includes an interlocking portion 10 that is disposed so as to be in contact with the tension member 2 and that interlocks with the movable member 1 to amplify the operation of the movable member and transmit it to the tension member 2. In this example, the interlocking portion 10 is a lever 101 that is rotatably coupled to the lower end of the movable member 1 and extends to both sides thereof. The lever 101 is engaged with the tension member 2 at the tip. The lever 101 is rotatably supported by a support portion 102 having an intermediate portion erected from the holding frame. The support portion 102 is supported at a position closer to the connection point with the movable member 1 than the engaging portion with the tension member 2. Therefore, when the movable member 1 moves, the amount of movement is amplified by the lever 101 and transmitted to the tension member 2. The two tension members engaged with the lever 101 may be independently supported by the holding frame, and the detection unit may be provided on only one of them, or may be the circulating tension material described in FIG.
[0031]
FIG. 10 shows an example of an operation mechanism in the form of a keyboard device for an electronic musical instrument. This operating mechanism is supported by a movable member 3 and a holding frame 4 in the form of a key, and a tension member 2 that extends in the direction in which the movable members 3 are arranged, and supports the plurality of movable members. And a holding member 11 supported by a holding frame so as to bend slightly by the pressing operation after reaching to bend the tension member 2. This operation mechanism is further provided with a detecting unit 3 for detecting a change in the longitudinal direction of the tension member due to the bending caused by the movement of the holding member 11 and a tension incorporated in the detection unit 3 to apply tension to the tension member, as in the above example. And an elastic member.
[0032]
The holding member 11 is formed with a plurality of pushing protrusions 12 projecting in the moving direction of the holding member at a position in contact with the tension member, and the holding frame 4 is shifted from the pushing protrusion 12 at a place where the tension member 2 is supported. A receiving convex portion 13 is provided at the position. The tension member 2 extends in a meandering manner between the pushing convex portion and the receiving convex portion.
[0033]
This operating mechanism operates as follows. When the movable member 1 is pressed, it comes into contact with the holding member 11. By this operation, a normal sound generation mechanism such as a key switch is activated to generate sound. When the movable member 1 is further pressed, the holding member 11 slightly moves in the pressing direction, further bending the meandering state of the tension member 2. Thereby, the tension member 2 is stretched, and the deformation thereof is detected by the detection unit 3. The tension member 2 extends in a meandering manner between the push-in convex part 12 and the receiving convex part 13, and the push-in convex part 12 further strengthens the meandering in cooperation with the receiving convex part as the holding member 11 moves. Since the tension member is deformed as described above, the deformation amount of the tension member 2 is increased. Therefore, the amount detected by the detection unit 3 also increases.
[0034]
FIG. 11 shows an external force detection device applicable to an electronic musical instrument operating mechanism. This apparatus includes a movable member 20 reciprocated by an external operation, a holding frame 4 that holds the movable member, a tension member 2 supported by the holding frame, and the movable member 20 when the movable member 20 is operated. And a detector 3 provided on the tension member so as to detect a change in the longitudinal direction of the tension member 2 due to the bending caused by contact with the tension member. The holding frame 4 is provided with an engaging portion 21 apart from a position sandwiching the movable member to be detected, and the tension member 2 is supported at one end by one engaging portion 21, and both engaging portions 21 are connected. The other end is supported by the engaging portion 21 located at the turning end after at least one turn. The extending tension member 2 that circulates is disposed at a position where the forward path extending material 2x extending from one engagement portion 21 to the other engagement portion 21 and the return path extending material 2y in the return direction can come into contact with the movable member 20. The tension member 2 is held in the tension member axial direction by the locking portions 22 located on both sides of the movable member 20, and the locking portion 22 is moved by the movement of the driving piece 23 positioned between the locking portions 22 in the tension member transverse direction. It is supported so that it can meander on the border. The drive piece 23 is arranged so as to weaken the meandering of the outward path extending material 2x and strengthen the meandering of the return path extending material 2y by moving with the movable member 20.
[0035]
In this example, the locking portion 21 includes a fixing portion 21a fixed to the holding frame 4 and a pulley 21b rotatably supported by the holding frame 4, and the tension member 2 is formed from the fixing portion 21a. It goes around once through the pulley 21b. However, the tension member may rotate the engaging portion a plurality of times. A protrusion 24 is formed so that the driving piece 23 can be locked to the movable member 20. Further, in the state before the movable member 20 is moved, the forward path extending material 2x meanders, and the return path extending material 2y does not meander. Instead of this, the return path extending material may meander in the opposite direction to the outward path extending material. In the illustrated example, the elastic member 5 is interposed in the vicinity of the end portion of the return path tension material, and a tensile force is applied to the tension material. However, since the amount of expansion / contraction of the tension member is small, this elastic member may be omitted, or the tension member itself may be tensioned to some extent by applying an elastic force. The detection unit 3 includes a target 30 fixed to a part of the tension member 20 and an optical position reading device 31 that detects the target. In addition to such a displacement gauge, as shown in FIG. 11A, a pressing piece 32 is fixed to a part of the tension member 2, and a spring 34 is interposed between the pressure sensing member 33 fixed to the holding frame 4. It is also possible to detect the movement of the tension member by pressure. In the illustrated example, the movable member 20 is arranged so as to move in both directions on the circumferential surface of the tension member. However, if the meandering direction of the movable member and the tension material is substantially the same, the movable member 20 is perpendicular to the circumferential surface of the tension material. Various directions such as a direction or a direction inclined at an angle can be set.
[0036]
This device operates as follows. When the movable member 20 is moved from the state shown in the drawing, as shown by the movable member 20 at the left end of the figure, the drive piece 23 locked to the protrusion 24 of the movable member 20 weakens the meandering of the outward path extending material 2x, and the return path extending material. Move to strengthen 2y meander. As a result, the outward stretch material 2x moves to the right in the figure, and the backward stretch material 2y moves to the action in the figure. If this movement is detected by the detection unit 3, the movement of the movable member 20, that is, the external force applied to the movable member 20 can be detected. The tension member moves when any movable member engaged with the tension member is moved. Moreover, even if a large number of movable members are moved, the amount of movement of the tension member does not decrease.
[0037]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the operation mechanism for electronic musical instruments which has the following effects can be provided.
[0038]
In the present application, the first aspect of the present invention is to support a tension member on a holding frame that holds a movable member via an elastic member, and to provide a detection unit so as to detect a change in the longitudinal direction of the tension member. The engaging portion is provided apart from the position where the movable member is sandwiched, and the tension member is supported at one end by one engaging portion, and circulates both engaging portions at least once and the other end at the engaging portion. Is supported. Thus, since the tension member 2 is stretched around the engaging portion, when the movable member comes into contact, the total amount of deflection is increased by the amount of the circumference. Therefore, the change in the longitudinal direction detected by the detection unit is large accordingly. In this way, since a large detection value can be obtained with a simple structure, the error is reduced correspondingly, and high accuracy of musical tone control is achieved.
[0039]
According to a second aspect of the present invention, an active tension material that contacts the movable member and a negative tension material that does not contact the movable member are provided as the tension material supported by the holding frame, and the movement of the end portion of the active tension material by the contact with the movable member is performed by the amplification mechanism. Is amplified and transmitted to the end of the negative tension member. Therefore, the detection unit provided in the negative tension member can detect the amplified change. Also in this case, a large detection value can be obtained with a simple structure, and high accuracy of musical tone control can be obtained.
[0040]
In the third invention, the tension member is supported on the holding frame that holds the movable member via the elastic member, the detection unit is provided so as to detect the change in the longitudinal direction of the tension member, and the interlocking unit that is interlocked with the movable member is provided. The operation of the movable member is amplified and transmitted to the tension member. Therefore, the detection part provided in the tension member can detect the amplified change, and a large detection value can be obtained with a simple structure, and high accuracy of musical sound control can be obtained.
[0041]
According to a fourth aspect of the present invention, there is provided an electronic musical instrument operating mechanism that includes a tension member extending in a direction in which a plurality of movable members are arranged, and supports the plurality of movable members, and is slightly operated by a pressing operation after reaching the deepest portion in the reciprocating movement of the movable members. A holding member that moves the bending member to bend the tension member, a detection unit that is provided in the tension member so as to detect a change in the longitudinal direction of the tension member that occurs in accordance with the movement of the holding member, and an elastic member that applies tension to the tension member. The holding member is formed with a plurality of pushing projections protruding in the moving direction of the holding member at a position in contact with the tension member, and the holding frame is shifted from the pushing projection at a position where the tension member is supported. A receiving convex portion is provided at the position. Therefore, when the movable member is further pressed from the pressing state necessary for sound generation, the holding member moves slightly in the pressing direction. The tension member extends in a meandering manner between the push-in convex part and the receiving convex part, and the push-in convex part deforms the tension member so as to further strengthen the meander in cooperation with the support convex part as the holding member moves. Therefore, the amount of deformation of the tension member increases. Therefore, the amount detected by the detection unit is increased, and high-accuracy tone control is possible with a simple structure.
[Brief description of the drawings]
FIG. 1 is a perspective view schematically showing an operation mechanism for an electronic musical instrument having a basic structure leading to the present invention.
FIG. 2 is a plan view illustrating positions when the electronic musical instrument operating mechanism according to the invention is attached to an electronic piano.
FIG. 3 is a perspective view schematically showing an example of an operating mechanism for an electronic musical instrument according to the present invention (first invention).
FIG. 4 is a perspective view schematically showing a main part of another example of the electronic musical instrument operating mechanism according to the present invention (first invention).
FIG. 5 is a perspective view schematically showing an example of an operation mechanism for an electronic musical instrument according to the present invention (second invention).
FIG. 6 is a perspective view schematically showing a main part of another example of the operation mechanism for an electronic musical instrument according to the present invention (second invention).
FIG. 7 is a side view schematically showing a main part of still another example of the operating mechanism for an electronic musical instrument according to the present invention (second invention).
FIG. 8 is a perspective view schematically showing a main part of still another example of the operation mechanism for an electronic musical instrument according to the present invention (second invention).
FIG. 9 is a perspective view schematically showing a main part of an example of an operating mechanism for an electronic musical instrument according to the present invention (third invention).
FIG. 10 is a perspective view schematically showing an example of an operation mechanism for an electronic musical instrument according to the present invention (fourth invention).
FIG. 11 is a front view schematically showing an example of an external force detection device applicable to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1: Movable member, 2: Tension material, 3: Detection part, 4: Holding frame, 5: Elastic member, 7: Engagement part, 8: Amplification mechanism, 10: Interlocking part, 11: Holding member, 12: Pushing convex part , 13 receiving convex part

Claims (4)

A movable member reciprocated by an external operation;
A holding frame for holding the movable member;
A tension member supported by the holding frame;
Detection that is provided in the tension member to detect a change in the longitudinal direction of the tension member due to bending caused by contact with the movable member when the movable member is operated, and that outputs a detection value as a parameter for controlling musical sound of an electronic musical instrument And
An electronic musical instrument operating mechanism comprising an elastic member that applies tension to the tension member,
The holding frame is provided with two engaging portions apart from a position sandwiching the movable member to be detected, and the tension member is supported at one end by one engaging portion, and both engaging portions are at least The other end is supported by the engaging portion positioned at the end of the rotation, and the detection portion and the elastic member are provided between any of the engaging portions and the tension member. The operating mechanism for an electronic musical instrument, wherein the tension member is arranged at a position where it can come into contact with the movable member. A movable member reciprocated by an external operation;
A holding frame for holding the movable member;
An active tension member supported by the holding frame at a position in contact with the movable member;
A negative tension member supported by the holding frame at a position not in contact with the movable member;
A fixing portion for supporting one end of the active tension material and the negative tension material on the holding frame;
An amplifying mechanism that amplifies the movement of the other end of the active tension member due to bending caused by contact with the movable member when the movable member is operated and transmits the movement to the other end of the negative tension member;
A detection unit that is provided in the negative tension member so as to detect a change in the longitudinal direction of the negative tension member due to the transmission, and that outputs a detection value as a parameter for musical sound control of the electronic musical instrument;
An operating mechanism for an electronic musical instrument, comprising: an elastic member that applies tension to the active tension member and the negative tension member. A movable member reciprocated by an external operation;
A holding frame for holding the movable member;
A tension member supported by the holding frame;
An interlocking portion that is arranged so as to be in contact with the tension member, and is coupled to the movable member to amplify the operation of the movable member and transmit it to the tension member;
A detection unit that is provided in the tensioning material so as to detect a change in the longitudinal direction of the tensioning material due to bending caused by the operation of the interlocking unit, and that outputs a detection value as a musical sound control parameter of the electronic musical instrument;
An operating mechanism for an electronic musical instrument, comprising: an elastic member that applies tension to the tension member. A plurality of movable members reciprocated by pressing operation and release thereof;
A tension member supported by a holding frame and extending in the direction in which the movable members are arranged;
A holding member supported by the holding frame so as to support the plurality of movable members and move slightly by a pressing operation after reaching the deepest part in the reciprocating movement of the movable members to bend the tension member;
A detection unit that is provided in the tensioning material so as to detect a change in the longitudinal direction of the tensioning material due to bending caused by the movement of the holding member, and outputs a detection value as a musical sound control parameter of the electronic musical instrument;
An elastic member that applies tension to the tension member;
The holding member is formed with a plurality of pushing projections protruding in the moving direction of the holding member at a position in contact with the tension member, and the holding frame is shifted from the pushing projection at a place where the tension member is supported. An operating mechanism for an electronic musical instrument, wherein a receiving convex portion is provided at a position.

Images