JP3858922B2 - Percussion instrument type sound control device - Google Patents

Description

  The present invention provides a fixed portion and a pad body placed on the fixed portion, and the pad body is provided with a sensor output from a sensing unit having a pad skin body having a hit surface and a sensor for detecting the hit. The present invention relates to a percussion-type musical sound control apparatus that generates a musical sound control signal in response.

  Conventionally, this type of apparatus is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-175651 or Japanese Patent Application Laid-Open No. 9-297576. In JP-A-6-175651, a piezo-type piezoelectric sensor is fixed to a pad plate fitted in a pad rubber (pad skin), and the pad plate and the base plate are attached to the periphery of each plate via a cushioning material. Are joined together. Then, the vibration of the pad plate when the pad rubber is hit is detected by the piezoelectric sensor.

  Japanese Patent Application Laid-Open No. 9-297576 is a stud that is fixed to a pad skin to a pad skin, and is fixed to the case by an elastic holding body at the periphery thereof, and is a stud welded to the periphery of the pad plate. The sensor plate is held and a piezoelectric piezoelectric sensor is fixed to the sensor plate. The impact applied to the pad skin is transmitted to the sensor plate via the pad plate and the stud, and the vibration of the sensor plate is detected by the piezoelectric sensor.

In general, in this type of apparatus, in consideration of the expressive power (dynamic range) of volume, it is the mainstream to use a piezoelectric piezoelectric sensor as in the above two publications. The reason is that the piezo-type piezoelectric sensor does not saturate against the fortissimo strike (a phenomenon of saturation of the output appears), and can make a difference in volume with respect to the forte and fortissimo strikes. This is the reason why piezoelectric piezoelectric sensors are mainstream.
JP-A-6-175651 JP-A-9-297576

  However, the apparatus disclosed in Japanese Patent Laid-Open No. 6-175651 has a structure in which the pad plate and the base plate are joined to each other through a cushion material at the periphery thereof, so that the sensitivity becomes non-uniform according to the hit portion. For example, the sensitivity is low in the immediate vicinity of the cushion material, and the sensitivity is better at the center than at the periphery of the pad rubber. The device disclosed in Japanese Patent Application Laid-Open No. 9-297576 has been improved so as not to make the sensitivity as nonuniform as possible, but the structure for holding the pad body with respect to the case (fixed portion) is formed integrally with the pad skin body. It is structured to be fixed to the case at the peripheral edge by an elastic holder. Furthermore, the mutual positional relationship between the three studs (1a, 1b, 1c) for holding the sensor plate and the four elastic holders (5a, 5b, 5c, 5d) for fixing the pad skin is not uniform. . For this reason, it is insufficient to obtain a substantially uniform sensitivity no matter where you strike.

  Therefore, there is a demand for a device that can obtain the same level of output with the same striking force regardless of the position where the impact is applied to the pad surface.

  On the other hand, the present inventor has proposed that a light emitting means is provided on the pad surface in an electronic drum or the like, and the light emitting position and light intensity are controlled according to the striking position and the striking strength of the pad surface (Japanese Patent Application No. Hei. 10-66090). In this way, visual information on the hit can be confirmed, and the hit position and hit strength by the teacher and the teacher can be easily confirmed, which is useful for practice and contributes to quick improvement. Furthermore, since the player's own performance form, particularly the striking aspect, can be visually recognized during live (live) performances, performance that impresses the audience is facilitated.

  However, as described above, the piezo-type piezoelectric sensor is suitable for detecting the striking level, but is not suitable for detecting the striking position with respect to the pad. In the conventional apparatus, the striking detected by the sensor is not suitable. It only stops to control the volume according to the level.

  In this case, if the structure of the pad body like the conventional percussion instrument type sound control device is adopted, it is difficult to obtain information corresponding to the manner of striking the pad surface even if the striking level can be detected. Therefore, development from the viewpoint of controlling light emission and the like while maintaining a sound pattern that is close to ideal was still behind.

  In addition, the output of the piezoelectric sensor is generally used to control the volume, which is one of the basic elements of the musical sound, for example, but when other musical sound elements can be controlled according to the manner of striking, Rich variations of music.

  However, as described above, the piezo-type piezoelectric sensor is suitable for detecting the striking level, but is not suitable for detecting the striking position with respect to the pad. In the conventional apparatus, the striking detected by the sensor is not suitable. It only stops to control the volume according to the level. Further, the device disclosed in Japanese Patent Laid-Open No. 6-175651 has a structure in which a pad plate is joined to the periphery of the pad plate via a cushion material, and the device disclosed in Japanese Patent Laid-Open No. 9-297576 has a pad skin body as an elastic holding body at the periphery. The structure is fixed to the case. For this reason, any structure is unsuitable for detecting the striking position and striking mode with respect to the pad epidermis or obtaining information for controlling the musical tone element.

  Note that there is a problem that variations and fun are lacking simply by causing the pad surface to emit light due to the striking level detected by the piezo-type piezoelectric sensor, or by controlling a musical tone element other than the volume, for example.

  The present invention provides a fixed portion and a pad body placed on the fixed portion, and the pad body receives a sensor output from a sensor means having a pad skin body having a hit surface and a sensor for detecting the hit. It is an object of the percussion-type musical sound control apparatus to generate a musical sound control signal according to the control of the musical sound signal according to the displacement of the pad body relative to the fixed portion when hitting the pad body, thereby enabling various expressions. Another object is to prevent excessive deformation of the sensor at the time of impact.

  The percussion instrument type musical sound control apparatus according to claim 1 of the present invention is provided with a fixed portion (upper case 10) and a pad body (20) placed on the fixed portion, the pad body having a hit surface. An epidermis (2), an elastic projection (25) formed on the peripheral edge of the lower surface of the pad epidermis, and a sensor (piezoelectric sensor 33) provided at the center of the lower surface of the pad epidermis via an elastic body And the sensor is floated by the elastic body (sensor fixed body 31) with respect to the fixed portion (upper case 10), and the pad skin body is located at the center of the pad skin body with respect to the fixed portion. The elastic protrusion is used as a stopper (25) for the fixing portion when hitting the pad skin, and the hitting of the pad skin from the center of the pad skin is performed by the elastic protrusion. To the sensor via an elastic body Reached is, percussion-type musical tone control apparatus characterized by generating a musical tone control signal in response to the output of the sensor. Note that the parentheses are examples corresponding to embodiments described later, and are not limited thereto.

  According to the percussion instrument type musical tone control apparatus of the first aspect, for example, the volume level is controlled by the sensor output. When a hit is applied to the pad body, the pad skin body is stopped at a predetermined position by an elastic protrusion (stopper). Therefore, excessive deformation of the sensor is prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 5 is a top view of an electronic drum device to which the percussion instrument-type musical sound control device of the embodiment is applied. The top case 10 as a fixing portion includes a pad body 20 constituting four large hitting surfaces, and Three pad bodies 20 'constituting a smaller hitting surface are arranged. Speaker sound emitting grooves 30 are formed on the left and right sides of the upper case 10 to generate stereo sound. An operation panel 40 having switches, dials, indicators and the like is disposed on the performer side of the top case 10. Further, a concave portion 50 is provided below the main body as indicated by a broken line, and a connection terminal for connecting a lead wire or the like to an external sound system or the like is provided. In the following description, each embodiment of the percussion instrument type musical sound control apparatus will be described by taking the pad body 20 as an example. However, the plurality of pad bodies 20 and 20 'may have the same type of structure, which will be described later. You may combine the thing of each Example suitably.

(First Embodiment) FIG. 1 is a side sectional view and a partially enlarged sectional view of a percussion instrument type musical sound control apparatus, FIG. 2 is a partial plan view of an upper case 10, and FIG. 3 is a sensing unit 3 in the percussion instrument type musical sound control apparatus. FIG. 1 is a cross-sectional view taken along the line AA in FIG. 5 and corresponds to the cross-sectional view taken along the line AA in FIGS. 2 and 3. FIGS. 1 and 2 also illustrate the first and second embodiments. The movable contact 41 and fixed contact 42 in FIG. 1B and the fixed contact 42 in FIG. In the first embodiment, the movable contact 41 and the fixed contact 42 are not provided.

  The upper surface case 10 is formed of ABS resin or the like, and is formed with a pad housing portion 1 having a circular shallow recess for housing the pad body 20. In the pad housing portion 1, a sensor facing portion 11 formed in a thin disc shape at the center, an annular protrusion 12 projecting annularly on the outer periphery of the sensor facing portion 11, and spreading on the outer periphery of the annular protrusion 12. An annular flat surface portion 13 is formed. Between the sensor facing part 11 and the annular protrusion 12, screw holes 14 for fixing a sensor fixing body 31 to be described later are formed at three locations. Further, a part of the sensor facing part 11 includes a piezoelectric sensor 33. An opening 15 for drawing out the lead wire 33a is formed.

  As shown in FIG. 1, the pad body 20 includes a pad skin body 2 and a sensing unit 3, and the sensing unit 3 includes a sensor fixed body 31, a radial pressurizing unit 32, and a piezoelectric sensor 33.

  The pad skin 2 is formed of an elastic member such as rubber and has a substantially disk shape. The hitting surface 21 on the surface of the pad skin 2 is slightly raised toward the center. Further, an annular rim portion 22 extending to the back side is formed at the peripheral edge, and a protrusion 23 (see FIG. 1B) is formed on the entire outer surface of the rim portion 22. As indicated by the alternate long and short dash line in FIG. 2, the diameter of the rim portion 22 is slightly smaller than the inner diameter of the pad housing portion 1, and the pad skin 2 is placed inside the pad housing portion 1. And the tip of the ridge 23 comes into contact with the inner side surface 1a of the pad housing portion 1 (see FIG. 1B). Thereby, the protrusion 23 has the role which prevents dust etc. from entering from the clearance gap between the pad skin body 2 and the pad accommodating part 1. FIG. In addition, a large number of small protrusions 24 are formed on the back surface of the pad skin body 2, and elastic protrusions 25 are formed at eight locations around the inner circumference of the rim portion 22. The elastic protrusion 25 has a constricted portion 25a having a reduced side diameter and a flange portion 25b having a larger diameter than the constricted portion 25a.

  As shown in FIG. 3, the sensor adhering body 31 and the radial pressurizing portion 32 of the sensing unit 3 are formed into a thin disk shape with stainless steel or the like having a high spring property. The sensor adhering body 31 is formed with screw holes 31a at three locations corresponding to the screw holes 14 of the pad accommodating portion 1, and a positioning projection 31b is formed at the center. The radial pressurizing portion 32 is formed with three screw holes 31a corresponding to the screw holes 31a of the sensor fixed body 31 and through holes 32a having a diameter larger than the head of the screw 17 (FIG. 1). Further, holes 32 b for fixing to the pad skin 2 are formed at eight locations corresponding to the elastic protrusions 25 of the pad skin 2. Further, a bulging portion 32c bulging in a thin truncated cone shape is formed at the center of the radial pressurizing portion 32, and a positioning hole 32d is formed at the center thereof.

  The sensor adhering body 31 and the radial pressurizing portion 32 bring the bulging portion 32c of the radial pressurizing portion 32 into contact with the sensor adhering body 31, and the positioning protrusion 31b is fitted into the positioning hole 32d, thereby the bulging portion 32c. These are fixed to each other by spot welding at three places (parts indicated by two-dot chain lines in FIG. 3) equally divided into three equal parts. Note that the piezoelectric sensor 33 is fixed to the center surface of the sensor fixed body 31 after spot welding.

  Here, the assembly of this apparatus will be described. First, the position of the screw fixing hole 31a of the sensor fixing body 31 and the position of the through hole 32a of the radial pressurizing portion 32 are aligned, and the sensor fixing body 31 and the radial pressurizing portion 32 are spot welded with the opposing surfaces aligned. The piezoelectric sensor 33 is bonded to the metal surface side and the sensor fixing body 31 so as to face each other. As a result, the piezoelectric sensor 33, the sensor fixed body 31, and the radial pressure member 32 are integrally formed. And the lead wire 33a of the piezoelectric sensor 33 is made to adhere to this.

  Next, the lead wire 33a is pulled out from the opening 15 to the inside of the main body, and the sensor fixing body 31 is fitted to the inside of the annular protrusion 12 of the pad accommodating portion 1, and the through hole 32a of the radial pressurizing portion 32 and the sensor are fixed. The screws 17 (FIG. 1) are screwed into the screw holes 14 of the pad housing portion 1 (three locations) via the screwing holes 31 a of the body 31, and the sensor fixing body 31 is attached in the pad housing portion 1. Next, the pad skin 2 is placed on the radial pressurization part 32 by aligning the elastic protrusion 25 of the pad skin 2 with the position of the hole 32 b of the radial pressurization part 32. And it presses from the to-be-struck surface 21 side of the pad skin body 2, and press-fits the elastic protrusion 25 in the hole 32b. As a result, the flange portion 25b at the tip of the elastic protrusion 25 expands again on the annular flat surface portion 13 side through the hole 32b, whereby the radial pressurizing portion 32 is fixed to the pad skin body 2 at the peripheral edge portion 32A.

  A number of small protrusions 24 formed on the back surface of the pad skin 2 serve as follows. Each of the small protrusions 24 is formed on the upper surface of the radial pressurizing portion 32 when the radial pressurizing portion 32 and the pad skin body 2 are fixed by pressing the elastic protrusion 25 into the radial pressurizing portion 32. It is provided so that it always press-contacts. In other words, the elastic force of the small protrusion 24 ensures the integration of the pad skin 2 and the radial pressurizing part 32, and even if the radial pressurizing part 32 is slightly deformed when struck, the deformation is reduced by the small protrusion 24. Absorbed. Thereby, the striking force to the pad skin body 2 is faithfully transmitted to the radial pressurizing unit 32.

  As described above, the sensing unit 3 is coupled to the pad skin body 2 having the hit surface 21 to form the pad body 20, and the pad body 20 is attached to the upper surface case 10 that is a fixing portion on the sensing unit 3 side. It has a structured. The sensing unit 3 is provided with a piezoelectric sensor 33 at the radial center of the radial pressurizing unit 32, and the piezoelectric sensor 33 is floated by the sensor fixing body 31 (elastic body) with respect to the upper case 10 (fixed part). The radial pressing part 32 is fixed to the pad skin 2 at the peripheral edge part 32A.

  FIG. 4 is an operation diagram of the embodiment, and the operation of the embodiment will be described with reference to FIG. 4 shows a side cross-section corresponding to the arrow B-B in FIGS. 2 and 3. In FIG. 4, the thickness is exaggerated and details are omitted for easy understanding. FIG. 4 (A) shows a state where no hit is applied. FIG. 4B shows a state in which a hit (arrow) is applied to a part of the peripheral edge of the pad epidermis 2, and the radial pressurizing part 32 deforms the bulging part 32 c itself while deforming the bulging part 32 c. Thus, a pressing force is applied to the central portion of the sensor fixed body 31 (displacement amount A). The sensor fixed body 31 is elastically deformed so that the piezoelectric sensor 33 side swells.

  FIG. 4C shows a state in which a stronger impact than that in FIG. 4B is applied, and the elastic deformation of the sensor fixed body 31 increases (displacement amount B, B> A). However, the lower surface of the flange portion 25b of the elastic protrusion 25 and the lower surface of the rim portion 22 abut against the annular flat surface portion 13 of the pad housing portion 1, and the sensor fixed body 31 is not further deformed. That is, the elastic protrusion 25 and the rim portion 22 work together to serve as a stopper. Thereby, excessive deformation of the piezoelectric sensor 33 is prevented. FIG. 4 (D) shows a case where an impact is applied to the center of the pad epidermis 2. In this case, the pad epidermis 2 is displaced so as to be constant as a whole (C1 = C2). Then, the sensor fixed body 31 is deformed and elastically deformed so that the piezoelectric sensor 33 side swells around the center.

  In this way, the piezoelectric sensor 33 is deformed together with the sensor fixed body 31, and the piezoelectric sensor 33 generates piezoelectricity due to the piezoelectric effect and is output from the lead wire 33a. In addition, the time series operation | movement with respect to one hit is as follows. When an impact is applied to the pad epidermis 2, the displacement of the pad epidermis 2 shifts from FIG. 4 (A) to FIG. 4 (B) or FIG. 4 (C), for example. It returns a little to the direction of, and alternating vibration is repeated by this process. That is, the vibration is attenuated while repeating the states of FIG. 4A and FIG. 4B, and an output signal corresponding to the vibration is obtained from the piezoelectric sensor 33. Depending on the manner of hitting, instead of alternating vibration, a reciprocal displacement is obtained, and a pulse-like signal in which the displacement and vibration substantially coincide is obtained. In this case, the displacement signal is a signal having different polarities for going and returning, but only “going (in the case of FIG. 4B)” is detected. Then, as processing of the output signal of the piezoelectric sensor 33, for example, an envelope of the output signal is detected, and a trigger signal and a level signal are detected from the envelope to perform tone generation control of the musical sound.

  As described above, since the radial pressing part 32 and the sensor fixing body 31 are both radial (circular in the above example) and both are fixed at the center, the pad skin 2 (and the radial pressing part 32). ) Is concentrated on the central portion of the radial pressurizing portion 32, and the force is transmitted to the central portion of the sensor fixing body 31 from there. Thereby, the sensor adhering body 31 is deformed around its central portion, and the piezoelectric sensor 33 is similarly deformed. Therefore, if the striking force is applied to the same degree, the piezoelectric sensor 33 can obtain the same output signal regardless of the portion of the pad skin 2 that is subjected to the striking force. Thereby, even if a vibration input is input from any direction except the pad accommodating part 1 (attachment part) of the pad body 20, the sensitivity corresponding to the input level is made.

  In order to prevent sound generation when the output of the piezoelectric sensor 33 is about noise, sound generation is started when the output of the piezoelectric sensor 33 exceeds a predetermined threshold value.

  In the first embodiment described above, the elastic protrusion 25 and the rim portion 22 formed on the pad skin 2 constitute a lower limit stopper, but the stopper is formed only by the elastic protrusion 25 or the rim portion 22. It may be configured.

(Second Embodiment) As described above, FIGS. 1 and 2 also show the second embodiment. In the second embodiment, as shown in FIG. A movable contact 41 is formed on the lower surface by printing or the like of a conductive member, and a fixed contact 42 is formed on the annular flat surface portion 13 of the pad accommodating portion 1 at a position corresponding to each of the movable contacts 41 of the eight elastic protrusions 25. (See FIG. 2). The movable contact 41 corresponding to the fixed contact 42 constitutes a contact switch. Alternatively, the fixed contact 42 may be formed on the annular flat surface portion 13 by forming the fixed contact 42 on a donut board-like flexible substrate, and the fixed contact 42 may be arranged corresponding to the movable contact 41.

  The movable contact 41 and the fixed contact 42 are, for example, as shown in FIG. The fixed contact 42 is formed by printing and wiring two fork-type fixed contact patterns 42a and 42b so that the fork portions are mutually inserted. One fixed contact pattern 42a is connected to a common line with other switches. The other fixed contact pattern 42b is connected to a detection circuit or the like as a unique one indicating this switch. The movable contact 41 is formed in a circular shape on the spherical lower surface of the flange portion 25a of the elastic protrusion 25. When the flange portion 25a contacts the annular flat surface portion 13 and acts as a stopper, the flange portion 25a By elastically deforming, the movable contact 41 comes into contact with the fixed contact 42 as a circular contact surface, as indicated by a broken line in FIG. 9B. Thereby, the fixed contact patterns 42a and 42b are brought into conduction, and the switch is turned on. That is, when the impact is small, the elastic protrusion 25 does not come into contact with the annular flat surface portion 13 as shown in FIG. 4B, for example. Therefore, the switch is not turned on. The switch is turned on. Therefore, the tone is controlled by detecting the ON state of the switch.

  In the above embodiment, the case where the movable contact 41 and the fixed contact 42 constitute a one-stage switch is shown. For example, the movable contact 43 as shown in FIG. 10A and the fixed contact 44 as shown in FIG. , A pair of the movable contact 41 and the fixed contact 42, and a pair of the movable contact 43 and the fixed contact 44 may be configured to constitute a two-stage switch. Note that a portion where the fixed contact patterns 44a and 44b intersect can be formed by resist or through holes and bridges. In the case of the two-stage switch, the movable contact 41 comes into contact with the fixed contact 42 with a certain amount of impact, and the first-stage switch is turned on. Contacts the fixed contact 44, and the second-stage switch is turned on.

  Next, an example of musical tone control based on the operation of the switch will be described. Note that, as shown in FIG. 2, the symbols S1 to S8 are assigned to the fixed contacts 42, and the eight switches are described by being distinguished by S1 to S8. The player side (front) switch corresponds to S5, the right hand switch corresponds to S3, and the left hand switch corresponds to S7. Further, in each of the following control examples (1) to (5), the basic musical sound level, which is one of the basic elements of the musical sound, is controlled corresponding to the output signal of the piezoelectric sensor 33 as in the prior art.

  (1) The timbre is controlled by controlling the timbre filter in accordance with the ON state of the four switches S1, S3, S5 and S7. For example, when the switch S7 is turned on, the timbre is set to the darkest timbre (tone with less harmonic components), and when the switch S3 is turned on, the timbre is set to the brightest tone (tone with more harmonic components). When the switch S1 is on or the switch S5 is on, the timbre has an intermediate brightness.

  (2) The tone color is controlled in accordance with the ON state of the eight switches S1 to S8. The brightness of the timbre to be generated is preset in stages, and when any one of the switches S1 to S8 is turned on, the timbre is brightened by one stage. The second ON turns on one level brighter and the eighth turns on the brightest. In order to change the brightness of the timbre in steps, for example, the cut-off frequency of the timbre filter may be switched in steps. In addition, it is preferable to use a switch such as an operation panel so that the tone color is controlled to be brighter or darker.

  (3) Similarly to the above, the volume level is controlled stepwise according to the number of ON of the eight switches S1 to S8. Note that the control of the volume level is to further increase the volume with respect to the basic volume level determined according to the output of the piezoelectric sensor 33. Also in this case, it is preferable that the volume level is increased or decreased stepwise in combination with other switches.

  (4) Speakers are arranged at the front, rear, and left and right of the electronic drum device of the embodiment, respectively, and panning is controlled by these speakers in response to the switches S1 to S8 being turned on. For example, when the switch S1 is turned on, the sound of the front speaker is emphasized or only the front speaker is pronounced. Similarly, when the switch S7 is turned on, the left speaker, when the switch S5 is turned on, the front speaker (the main body speaker) or the rear speaker is turned on, and when the switch S3 is turned on, the right speaker is emphasized or sounded accordingly. For the switches S2, S4, S6 and S8, the sound image localization is set in the direction of the turned-on switch. Also, when all three switches S1, S8, and S7 are on, control is performed so as to emphasize the directivity in the S8 direction more than when only S8 is on. You may control.

  (5) At the time of sound generation, sound is generated when the output of the piezoelectric sensor 33 exceeds a predetermined threshold. From the time when the threshold is exceeded, a time after the predetermined time until the re-soundable time (30 to 100 ms or less) ) If any one or more of each switch is turned on, it is a heavy sound. For example, in the sound generation of the snare drum, only the sound due to the vibration of the skin is usually generated, but the sound of the skin is mixed with the sound of the sound line (snappy) on the back side of the drum. Further, in the case of the two-stage switch, it is possible to control so as to increase the degree of mixing of heavy sounds by turning on the second-stage switch.

  As described above, the on / off of the switches S1 to S8 corresponds to the change information of the distance between the hit surface 21 of the pad skin body 2 and the annular flat surface portion 13 (that is, the distance between the upper surface case 10 as the fixed portion). Based on this change information, tone elements other than the volume level (one of the fundamental elements of the tone) are controlled. Furthermore, in the case of a two-stage switch, each state where both the switches are off, the first stage is on, and the second stage is on corresponds to the distance change information.

(Third Embodiment) FIG. 6 is a partial cross-sectional view of a percussion instrument type tone control apparatus according to a third embodiment, and FIG. 7 is a plan view of a pad skin body according to the third embodiment. Elements similar to those in the embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In the third embodiment, the striking mode is visually displayed by causing the light emitter 5 disposed on the peripheral portion of the pad skin body 2 to emit light. Except for the portion of the light emitter 5, the first embodiment is implemented. The structure is similar to the example. That is, FIG. 6 corresponds to the CC arrow cross section of FIG. 7, but the AA arrow cross section passing through the elastic protrusion 25 of the pad epidermis 2 shown in FIG. 7 is the first embodiment shown in FIG. The structure is similar to the example. Further, the structure of the pad skin body 2 and the sensing unit of the third embodiment is also formed with holes 2a and 32e (FIG. 6) for fitting the light emitters 5 in the pad skin body 2 and the radial pressurizing part 32, respectively. Other than that, the structure is the same as that of the first embodiment.

  The annular flat surface portion 13 of the pad accommodating portion 1 is provided with a doughnut-like flexible substrate 6 that is aligned with the annular flat surface portion 13, and first and second fixed contacts are disposed on the upper surface of the flexible substrate 6. 62, 64 and an LED light source 65 are provided. Note that the LED light source 65 emits light at a predetermined luminance level by controlling the light emission luminance by a drive circuit (not shown).

  A total of eight light emitters 5 are arranged between the elastic protrusions 25 on the peripheral edge of the pad skin body 2, and the light emitters 5 can transmit light emitted from the LED light source 65. It is made of a transparent and elastic material such as rubber. The overall shape of the light emitter 5 is a substantially rotating body (excluding the upper end portion) obtained by rotating the cross section of FIG. 6 about the longitudinal center line of the light emitter 5, and is a substantially cylindrical light guide light emission. The condensing part 52, the condensing part 52 having a larger diameter than the light-guiding light emitting part 51, and the leg part 53 that extends from the lower end periphery of the condensing part 52 are integrally formed. The light emitter 5 is attached to the pad skin 2 by bonding or the like through the light guide light emitter 51 through the hole 32e of the radial pressurizer 32 and the hole 2a of the pad skin 2.

  A dome-shaped concave surface 52a is formed on the lower surface of the light collecting portion 52, a hollow portion 52b is formed between the concave surface 52a and the LED light source 65, and a white paint 52c is applied to the lower portion of the concave surface 52a. Yes. The leg portion 53 includes a first skirt portion 53a, a second skirt portion 53b, a third skirt portion 53c, and a flange portion 53d. In the light emitter 5, the flange portion 53d contacts the upper surface of the flexible substrate 6. The light condensing part 52 and the leg part 53 are disposed so as to cover the fixed contacts 62 and 64 and the LED light source 65.

  The first movable contact 61 is provided on the back surface between the first skirt portion 53 a and the second skirt portion 53 b so as to face the first fixed contact 62. Further, a second movable contact 63 is provided on the back surface between the second skirt portion 53 b and the third skirt portion 53 c so as to face the second fixed contact 64. The movable switch 61 and the fixed contact 62 constitute a first switch SW1, and the movable contact 63 and the fixed contact 64 constitute a second switch SW2.

  With the above configuration, the skirt portions 53a, 53b, and 53c of the leg portion 53 are elastically deformed, so that when the pad skin 2 is hit, the light guide light emitting portion 51 and the light collecting portion 52 together with the pad skin 2 are hit. It can move in the direction (vertical direction). Thereby, the change of the distance (namely, distance with upper surface case 10 as a fixing | fixed part) of the to-be-struck surface 21 of the pad skin body 2 and the cyclic | annular plane part 13 is the distance of the condensing part 52 and the LED light source 65. It becomes a change. The change in the distance appears as a change in the light emission intensity of the light guide light emitting unit 51 as will be described later. In addition, the movable contact 61 comes into contact with the fixed contact 62 to turn on the first switch SW1 for a certain level of impact, and the movable contact 63 is connected to the fixed contact 64 for an even stronger impact. The second switch SW2 is turned on together with the first switch SW1.

  Here, part of the light from the LED light source 65 is incident on the concave surface 52 a of the light collecting unit 52 of the light emitter 5, and this incident light is guided upward by the light guide light emitting unit 51. Since the light is emitted from the upper end surface 51 a, the light emitter 5 appears to shine at eight positions on the peripheral portion of the pad skin body 2. Further, when the pad skin body 2 is struck, the LED light source 65 is almost completely surrounded by the hollow portion 52b, and coupled with the reflection effect of the white paint 52c, the light emitted from the LED light source 65 does not escape in all directions, and is caused by the light collecting portion 52. Condensation efficiency is increased. This is because the solid angle formed by the concave surface 52a around the LED light source 65 is increased, and the luminous flux incident on the concave surface 52a from the LED light source 65 is increased. Thereby, the brightness | luminance of the upper end surface 51a of the light guide light emission part 51 becomes higher when a hit is applied rather than when a hit is not applied to the pad skin body 2. FIG. In addition, since the brightness of the upper end surface 51a changes according to the strength of the hit, the strength of the hit can be displayed visually, and the player can visually recognize it. Thus, the luminance change at the time of impact is realized only by the mechanical system, and the configuration is simplified.

  The third embodiment operates as follows. First, the volume level is controlled in accordance with the output of the piezoelectric sensor 33 as in the first and second embodiments. Further, the first and second switches SW1 and SW2 are not used, and the LED light source 65 is always in a light emitting state. It may be constantly flashing. In this state, at the time of non-blow, the eight light emitters 5 provided on the peripheral edge of the pad epidermis 2 always dimly shine, but at the time of strike, the light emitter 5 depends on the striking position and depending on the striking strength. The mode of the emission luminance of the light source changes. This indicates that when the entire pad epidermis 2 is viewed, the display mode changes depending on the performance mode.

  The light emission intensity of each light emitter 5 increases as the distance between the LED light source 65 and the position of the hit surface 21 where the light emitter 5 is disposed, and decreases as the distance increases. Further, since the pad skin body 2 is held at the central portion by the radial pressurizing portion 32 and the sensor fixing body 31 with respect to the upper surface case 10 as described above, the pad skin body 2 is hit against one side edge portion. When applied, the part where the blow is applied sinks but the other side tends to float slightly.

  Therefore, for example, as shown in FIG. 11, when a hit is applied to the peripheral portion of the pad skin 2, the light emission display H1 by the light emitter 5 at the hit position (position around the stick) becomes brightest at the moment of hitting. The light emitting display H2 opposite to the light emitting display H1 becomes dark. The intermediate light emitting display H3 has a medium brightness. Further, when a hit is applied to the center of the pad epidermis 2, the entire light emission display becomes bright only at the moment of hitting. In addition, if the striking position is continuously pressed, the above display mode is maintained. Furthermore, when two sticks are hit repeatedly, the light emitting display near each stick becomes bright at the moment of hitting, and the light emitting display at the positions of the two sticks is alternately repeated in light and dark, and the pitch (pronunciation) It can be visually grasped by the light-emission mode such as (interval). Therefore, for example, a one-to-one drum learning effect is enhanced.

  Next, when the first switch SW1 and the second switch SW2 are also used, for example, the following controls (1) to (4) are performed. In each of the following control examples (1) to (4), the basic musical sound level, which is one of the basic elements of the musical sound, is controlled corresponding to the output signal of the piezoelectric sensor 33 as described above. 12, the brightness of the LED light source 65 corresponding to the switches SW1 and SW2 (the LED light source 65 at the same position of the light emitter 5 as the switches SW1 and SW2) is adjusted to turn on the switches SW1 and SW2. Control by turning off / off. That is, the LED light source 65 is turned on when the switch SW1 is on, and it is lit brightly when the switch SW2 is further turned on. The on / off signals of the switches SW1 and SW2 are detected by a CPU or the like to control musical sounds such as timbres.

  (1) For example, of the eight sets of switches SW1 and SW2, when the switch SW1 is turned on, the timbre is brightened by one step as in the second embodiment. Further, among the eight sets of switches SW1 and SW2, regardless of SW1 or SW2, control is performed such that harmonic components are simply increased each time the number of ONs increases. Also in this case, it is preferable to use either other switch or switch to make the tone color brighter or darker.

  (2) Of the eight sets of switches SW1 and SW2, regardless of SW1 or SW2, the volume level is controlled stepwise in the same manner as in (3) of the second embodiment, simply by the number of switches ON. Also in this case, it is preferable that the volume level is increased or decreased stepwise in combination with other switches.

  (3) Panning control is performed in the same manner as (4) of the second embodiment in accordance with the ON states of the eight switches SW1 and SW2. However, when both SW1 and SW2 are on, the directivity in the direction of the set of switches is further emphasized.

  (4) Of the switches SW1 and SW2 in each group, a heavy sound is generated when both SW1 and SW2 are turned on.

  As described above, in this embodiment, visual information corresponding to the striking mode of the pad body 20 is obtained based on the change in the distance between the striking surface 21 of the pad skin body 2 and the annular flat surface portion 13 of the pad housing 1. I am doing so. Further, at the position of each light emitter 5, the on / off of the switches SW1 and SW2 corresponds to the change information of the distance between the hit surface 21 and the annular flat surface portion 13, and based on this change information, the musical sound Musical tone elements other than the volume level, which is one of the basic elements, are controlled.

(Fourth Embodiment) FIG. 8 is a partial sectional view of a percussion instrument type musical tone control apparatus according to the fourth embodiment. In FIG. Is omitted. In the fourth embodiment, the flexible substrate 6 and the switches SW1 and SW2 of the third embodiment are omitted, and the light emitter 8 is irradiated with light by the optical fiber 7 instead of the LED light source 65. In addition, also in this 4th Example, except the part which concerns on the light-emitting body 8 and the optical fiber 7, it is the structure similar to each said Example, FIG. 8 respond | corresponds to CC sectional view of FIG. The structures of the pad skin 2 and the sensing unit are the same as those in the third embodiment.

  The eight light emitters 8 are arranged in the peripheral portion of the pad skin 2 in place of the light emitter 5 of the third embodiment, and are made of a material such as rubber that is transparent and elastic like the light emitter 5. Yes. The entire shape of the light emitter 8 is substantially the same as that of the light emitter 5, and the substantially cylindrical light guide light emitting portion 81, the light collecting portion 82 and the leg portion 83 are integrally formed. It penetrates the hole 32e of the radial pressurizing part and the hole 2a of the pad skin 2 and is attached to the pad skin 2 by adhesion or the like. However, a difference from the light emitter 5 is that the leg portion 83 includes a single skirt portion 83a that is elastically deformed when hitting the pad skin 2 and a flange portion 83b.

  A fiber mounting hole 16 is formed in the annular flat surface portion 13 of the pad housing portion 1, and a fiber holding member 71 that holds the tip of the optical fiber 7 is fitted into the fiber mounting hole 16 and attached by adhesion or the like. It has been. Note that snap means may be applied to the side surface of the fiber holding member 71 so that the fiber holding member 71 can be attached to and detached from the fiber mounting hole 16 (upper case 10). The optical fiber 7 is drawn from the fiber mounting hole 16 into the main body on the back side of the front case 10. This optical fiber 7 is provided in the same manner at the other seven locations of the annular single-sided portion 13, and a total of eight optical fibers 7 are bundled together and guided to one LED light source 72.

  The optical fiber 7 is attached to the fiber holding member 71 as follows. As shown in FIG. 13, the tip of the optical fiber 7 is inserted into the hole 71a of the fiber holding member 71, and the tip of the optical fiber 7 is pulled inward slightly from the periphery of the hole 71a (FIG. 13 (A)). . Then, one or two drops of the liquid adhesive having the same refractive index as that of the optical fiber 7 is put on the tip of the optical fiber 7 (FIG. 13B). As a result, the adhesive slightly enters the gap between the hole 71a and the optical fiber 7 to bond the optical fiber 7 and the fiber holding member 71, and the hemisphere is bonded to the tip of the optical fiber 7 and the inner periphery of the hole 71a by the adhesive. A lens portion 73 (FIG. 13C) can be formed. The lens unit 73 emits light guided by the optical fiber 7 radially.

  The light emission luminance of the LED light source 72 is controlled by a drive circuit (not shown), and when the output of the piezoelectric sensor 33 reaches a predetermined threshold value, that is, when sounding, the LED light source 72 emits light at a constant luminance level. Then, light is emitted from the LED light source 72 to the eight optical fibers 7, and light is emitted from the lens portion 73 at the end portion of the optical fiber 7 on the light emitter 8 side to the light collecting portion 82 of the light emitter 8. Thereby, the upper end surface 81a of the light guide light emitting unit 81 emits light.

  The fourth embodiment operates as follows. Note that the volume level is controlled based on the output of the piezoelectric sensor 33 as in the above embodiments. In the fourth embodiment, when a predetermined level of impact is applied such that the output of the piezoelectric sensor 33 exceeds the threshold value, the lens portions 73 of the eight optical fibers 7 emit light with a constant luminance. However, as in the case of the third embodiment shown in FIG. 11, the light emitting display near the hitting position becomes brightest, and the light emitting display far from the hitting position becomes dark. When the strength of the impact is high, the display is bright, and when the strength is low, the display is dark. Thus, it is possible to visually grasp the manner of hitting. Even in the case of this embodiment, the specification may be that the light is always emitted.

  Also in this fourth embodiment, a movable contact is provided on the lower surface of the condensing portion 82 of the light emitter 8 and a fixed contact is provided on the annular flat surface portion 13 to constitute a switch. Control similar to (5) is possible.

  In each of the above embodiments, the sensor adhering body and the radial pressurizing portion are circular. However, for example, a hard plate material is disposed on the back surface of the pad skin 2 to reinforce substantially the entire back surface of the pad skin 2. In this case, the sensor fixed body and the radial pressurizing portion may be any shape that is substantially rotationally symmetric, such as a triangle, a square,..., A polygon, a circle, a Y shape, or a star shape.

FIG. 2 is a side sectional view and a partially enlarged sectional view of a percussion instrument type musical sound control apparatus according to first and second embodiments of the present invention. It is a partial top view of the upper surface case of the electronic drum apparatus of 1st and 2nd Example. It is a top view of the sensing unit in the percussion instrument type musical tone control apparatus of the first and second embodiments. It is an action | operation figure of the percussion instrument type | formula sound control apparatus of each Example. It is a top view of the electronic drum device to which the percussion instrument type musical tone control device of each embodiment is applied. It is a partial cross section figure of the percussion instrument type | formula sound control apparatus of 3rd Example. It is a top view of the pad skin body in the 3rd example. It is a partial cross section figure of the percussion instrument type | formula sound control apparatus of 4th Example. It is a figure which shows the example of the movable contact and fixed contact of a 1 step | paragraph switch in 2nd Example. It is a figure which shows the example of the movable contact and fixed contact of a two-stage switch in 2nd Example. It is a figure which shows the example of the light emission display at the time of the hit | damage to a pad skin body in 3rd Example and 4th Example. It is a figure which shows the example of the drive circuit of the LED light source by the 1st and 2nd switch in 3rd Example. It is a figure explaining the attachment method of the optical fiber to the fiber holding member in 4th Example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Pad accommodating part, 2 ... Pad skin body, 3 ... Sensing unit, 20, 20 '... Pad body, 21 ... Impact surface, 31 ... Sensor fixed body, 32 ... Radial pressurizing part, 32A ... Peripheral part, 33 ... piezoelectric sensors, 41, 61, 63 ... movable contacts, 42, 62, 64 ... fixed contacts.

Claims (1)

Providing a fixed portion and a pad body placed on the fixed portion;
The pad body includes a pad skin body having a hit surface,
Elastic protrusions formed on the lower surface periphery of the pad epidermis;
A sensor provided at the center of the lower surface of the pad skin through an elastic body;
The sensor is suspended by the elastic body with respect to the fixed portion,
The pad skin is floated by the elastic body with respect to the fixed portion at the center of the pad skin, and the elastic protrusion serves as a stopper for the fixed portion when hitting the pad skin,
A percussion instrument type musical sound control device characterized in that a hit on the pad skin body is transmitted from the center of the pad skin body to the sensor via the elastic body, and a musical tone control signal is generated according to the output of the sensor. .

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