JP2003150159A - Electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic musical instrument or the like of which the entire outer periphery of a pad member can emit light with a simple configuration while securing the durability or reduction of the cost. SOLUTION: A light transmitter 21 is formed in an almost annular shape from a transparent body transmitting light on the outer periphery of a pad member 10 and a light source part 30 is fitted between a starting end face 21a and a terminal end face 21b thereof. Light incident from an LED 31 of the light source part 30 to the light transmitter 21 is efficiently transmitted along with the axial direction of the light transmitter 21 by so-called principles of light propagation of an optical fiber. The upper face of the light transmitter 21 is formed as a light emitting face 21c, which is made a little coarse in surface coarseness (like ground glass) and light from the inside of the light transmitter 21 to the light emitting face 21c is irregularly reflected and partially leaked outsides without being fully reflected. In the view of a player, the light emitting face 21c looks luminous.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument of a drum device type or a keyboard device type, which detects a hit or a key depression operation of a pad body and generates a musical tone based on the detection signals.

[0002]

2. Description of the Related Art Conventionally, there is an electronic musical instrument in which a light source such as an LED is used to illuminate a part of the musical instrument. For example,
In the electronic drum (Japanese Patent Laid-Open No. 11-30983), a light guide portion is provided on the pad frame which is the outer periphery of the pad, and a light source such as an LED is provided in a state of being substantially in contact with the light guide portion so that the pad frame can be illuminated. ing.

In the electronic keyboard device, the key is made of a light-transmissive material, a light source is provided below the key to illuminate the key from below, and a light source is provided near the base end of the key to provide an upper surface of the key. It is known as an optical keyboard in which the key is made to appear shining by illuminating it from behind.

In these musical instruments, a light source is caused to emit light in accordance with a performance, and a light emission instruction signal is used for performance practice so as to strike a pad or instruct a key depression.

[0005]

However, in the above-mentioned conventional electronic drum, it is necessary to provide a large number of light sources in order to make the entire pad frame appear to shine, which complicates the configuration and increases the cost. . In addition, since many light sources are arranged close to the pad to be hit, failure is likely to occur and durability is low.

On the other hand, in the above-mentioned conventional electronic keyboard device, even if the method of irradiating the key is variously changed depending on the arrangement, direction, color, etc. of the light source, the light emission mode of the key is generally uniform and visually recognized. It was difficult to freely set the aspect in design. Therefore, there is room for improvement in obtaining a free light emission mode such as more decorative light emission.

There is also known a technique in which the key itself emits light so that it emits light, but even if only one key emits light, the intensity of light emission is required, and 10 or more keys emit light (for example, according to a key pressing instruction of automatic accompaniment). In the case of 10 keys or more including the light emission and the light emission by the key depression which is not according to the key depression instruction), when the electric power of the main circuit is combined, the electronic musical instrument enters the overload power supply state, and the musical instrument stops and malfunctions due to the power supply voltage drop. And so on. In addition to the above-mentioned inconvenience, a battery-powered electronic musical instrument causes extreme battery consumption.

Further, in the above-mentioned conventional electronic drum, when the light guide body is provided, it is necessary to fix the light guide body to the case body. For example, a convex portion is provided on one side of the light guide body and the case body side. The light guide body can be fixed by providing a recess on the other side and fitting them into each other. However, due to manufacturing error and convenience in assembling, a gap is not a little generated in the combined portion of the both. Further, the light guide body is a transparent body, and when the material is different from that of the case body side, the gap changes due to temperature change. Therefore, during use, when the pad body is hit, so-called "chattering" such as mechanical noise may occur due to the gap portion.

The present invention has been made to solve the above-mentioned problems of the prior art. A first object of the present invention is to illuminate the entire outer periphery of a pad body with a simple structure while ensuring durability and low cost. It is to provide an electronic musical instrument that can

A second object of the present invention is to provide an electronic musical instrument which has a simple structure and can emit a key in a desired manner. In particular, as an electronic keyboard instrument, there is provided an electronic musical instrument which emits a part of a key with a small amount of electric power, and the part does not become a shadow of a finger at the time of playing, and can efficiently emit a light.

A third object of the present invention is to provide an electronic musical instrument capable of shining the entire outer periphery of the pad body while suppressing chattering caused by hitting the pad body.

[0012]

In order to achieve the first object, an electronic musical instrument according to a first aspect of the present invention detects a hit on a hit surface of a pad body and outputs a musical tone signal according to the detected output. An electronic musical instrument of a drum device type that is generated, a linear light guide provided on the outer periphery of the pad body, and a light source section provided near one end of the light guide and emitting light toward the one end. And guiding the light emitted from the light source unit and incident on the one end portion of the light guide body to the other end portion of the light guide body by using the light propagation principle of an optical fiber, and exposing the light guide body. A part of the surface is roughened to form a light emitting surface, and at least a part of the light incident on the one end is emitted from the light emitting surface to the outside.

According to this structure, when the light source section emits light,
Light is incident on one end of the light guide. The incident light is guided to the other end of the light guide body by the light propagation principle of the optical fiber. A light emitting surface is formed on a part of the exposed surface of the light guide by roughening treatment, and at least a part of the light incident on the one end is diffusely reflected on the light emitting surface and emitted to the outside. And is seen. As a result, the entire outer periphery of the pad body can be illuminated with a simple structure and can be realized with a small number of LEDs and the like, so that the cost is low, the durability is low, and the failure is small. Therefore, it is possible to illuminate the entire outer periphery of the pad body with a simple configuration while ensuring durability and low cost.

According to a second aspect of the present invention, there is provided the electronic musical instrument according to the first aspect, wherein the light guide body is formed in a substantially annular shape with a part of the outer circumference cut out, and the one end portion of the light guide body is formed. The light source unit is arranged between the other end portion and the other end portion.

With this configuration, the light guide is formed in a substantially annular shape with a part of the outer circumference cut out, so that the light incident from one end of the light guide travels around the outer circumference of the pad and reaches the other end. The outer periphery of the pad body is guided and shines in a substantially annular shape. Therefore, it is possible to illuminate the outer periphery of the pad body in a substantially annular shape with a minimum light source,
The configuration can be simplified.

According to a third aspect of the present invention, in the electronic musical instrument according to the first or second aspect, at least a part of a portion of the light guide body located on the opposite side of the light emitting surface,
A cross section of the light guide along the longitudinal direction forms a corrugated surface.

According to this structure, a part of the light is reflected by the corrugated surface and travels toward the light emitting surface, so that the amount of light emitted from the light emitting surface to the outside increases. Therefore, the light emission intensity can be increased and the visibility can be further improved.

In order to achieve the second object, an electronic musical instrument according to a fourth aspect of the present invention is a keyboard device type electronic musical instrument which detects a key depression operation and generates a tone signal in accordance with the detected output. A key having a light guide section and a light source section that emits light toward the light guide section of the key, and roughening a part of the light guide section of the key to form an irregular reflection surface. Then, the light emitted from the light source unit and incident on the light guide unit of the key is guided to the irregular reflection surface side of the light guide unit using the light propagation principle of an optical fiber, and the light incident on the light guide unit At least a part of which is diffusely reflected by the irregular reflection surface and is visually recognized from the outside.

According to this structure, when the light source section emits light,
Light enters the light guide of the key. A part of the light guide part of the key has a diffuse reflection surface formed by roughening, and the light incident on the light guide part is the diffuse reflection surface side of the light guide part due to the light propagation principle of an optical fiber. Be led to. At least a part of the light that has entered the light guide portion is diffusely reflected by the irregular reflection surface and is visually recognized from the outside. As a result, a desired part of the key can be made to shine with a simple structure, and the light emitting part and the visible mode can be freely set by the position and the way of providing the irregular reflection surface, so that the design is free. It is easy to emit light with a high degree of decoration. In addition, the luminous efficiency is good and it contributes to power saving. Therefore, the key can be illuminated in a desired manner with a simple configuration.

According to a fourth aspect of the present invention, the key is formed of a light guide, the light source is provided on the base end side of the key, and a part of the key is roughened to form a diffuse reflection surface. The light emitted from the light source unit and incident on the base end portion of the key is guided to the tip end side of the key by using the light propagation principle of an optical fiber, and at least a part of the light incident on the base end portion is the It may be configured to be diffusely reflected by the irregular reflection surface and visually recognized from the outside.

According to a fifth aspect of the present invention, in the configuration of the fourth aspect, the incident light is diffusely reflected by the irregular reflection surface and leaks directly to the outside from the irregular reflection surface, and irregularly reflected by the irregular reflection surface. The key is visually recognized by at least one of passing through the inside of the light guide portion of the key and leaking to the outside through the upper surface of the light guide portion.

With this configuration, for example, if at least the key body portion is constituted by the light guide portion and the surface seen from the outside such as the side surface of the key is the irregular reflection surface, the incident light leaks to the outside directly from the side surface. It penetrates the inside of the transparent key body and leaks to the outside through the upper surface of the key body. In addition, if a part of the lower surface of the key body (for example, a part of the lower surfaces along both sides in the longitudinal direction of the key) or the lower surface of the lower end is a diffuse reflection surface, the incident light is transmitted through the inside of the key body. It leaks to the outside (from both side surfaces of the key) through the upper surface of the main body, and it seems that the upper surface emits light. In this case, there is no possibility that the key depression display will be hidden by the shadow of the finger when playing. In this way, the manner in which the light is visually recognized changes depending on the portion where the irregular reflection surface is provided, so that the optimum light emitting manner can be freely set according to the model.

When the irregular reflection surface is a surface which faces downward in claim 4 or 5, at least a part of the irregular reflection surface may have a corrugated surface along the longitudinal direction of the key. . As a result, part of the light is reflected by the corrugated surface and travels upward, so that the amount of light emitted from the upper portion of the key pressing surface or the like to the outside increases. Therefore, the light emission intensity can be increased and the visibility can be further improved.

In order to achieve the third object, an electronic musical instrument according to a sixth aspect of the present invention is a drum which detects a hit on a hit surface of a pad body (510) and generates a musical tone signal according to a detection output. A device-type electronic musical instrument, comprising a case body (5
06) and a light guide (5) provided on the outer periphery of the pad body.
21) and a light source unit (530) that emits light toward the light guide.
And a light guide holding portion (506a) for fixedly holding the light guide with respect to the case body.
It is characterized in that it is held by the light guide holding portion via a tape material (524).

According to this structure, the light guide body is held by the light guide body holding portion via the tape material, so that the light guide body is fixedly held to the case body. As a result, the tape material fills the gap between the light guide and the light guide holder,
Vibration caused by hitting the pad body is absorbed by the tape material, and the occurrence of "chattering" such as mechanical noise is suppressed. Therefore, it is possible to make the entire outer periphery of the pad body shine while suppressing chattering due to hitting of the pad body.

In order to achieve the first object, an electronic musical instrument according to a seventh aspect of the present invention is a drum device type which detects a hit on a hit surface of a pad body and generates a musical tone signal according to a detection output. An electronic musical instrument, a case body, and a light guide body provided around substantially the entire circumference of the pad body,
A light source unit configured to be sufficiently smaller than the light guide member and emitting light toward the light guide member; and a holding unit that fixedly holds the pad body and the light guide body with respect to the case body,
At least a part of the light emitted from the light source unit is configured to be visually recognized by being emitted to the outside from the surface of the light guide through the light guide.

According to this structure, the light emitted from the light source section is visually recognized by being emitted to the outside from the surface of the light guide through the light guide. Since the light guide body is provided over substantially the entire outer circumference of the pad body, the entire outer circumference of the pad body can be illuminated. Further, since the light source unit is configured sufficiently smaller than the light guide, the musical instrument can be downsized and can be easily realized with a small number of LEDs, etc., so that the cost is low, the durability is low, and the breakdown is small. Therefore, it is possible to illuminate the entire outer periphery of the pad body with a simple configuration while ensuring durability and low cost.

According to an eighth aspect of the present invention, there is provided the electronic musical instrument according to the seventh aspect, further comprising a light reflecting member provided on a surface other than the surface of the light guide body, wherein the light emitted from the light source section is the light reflecting member. When at least part of the light is emitted from the surface of the light guide to the outside through the light guide, the amount of light emitted from the surface of the light guide increases due to the reflection action of the light reflecting member. It is characterized by being configured.

According to this structure, when the light emitted from the light source section is emitted to the outside from the surface of the light guide through the light guide, the light reflecting member is provided on the surface other than the surface of the light guide. Since the amount of light emitted from the surface of the light guide increases due to the reflection action at 1, it is possible to increase the light emission intensity and further improve the visibility of the light guide.

In order to achieve the first object, the electronic musical instrument of claim 9 of the present invention is a drum device type which detects a hit on the hit surface of the pad body and generates a tone signal according to the detected output. An electronic musical instrument, wherein a case body, a light guide body provided on the outer periphery of the pad body, a light source section that emits light toward the light guide body, the pad body and the light guide body are provided in the case body. And a holding portion that fixedly holds the light source portion, and the light source portion is provided substantially below the pad body.

According to this structure, when the light source section emits light toward the light guide body, when at least a part of the light leaks to the outside through the light guide body, it is visually recognized that the outer periphery of the pad body emits light. To be done. Since the light source section is provided substantially below the pad body, the light source section is less likely to be accidentally struck when the pad body is struck, and there are few failures. Moreover, if the light source section is realized by a small number of LEDs, etc., the cost is low and the durability is high. Therefore, it is possible to illuminate the entire outer periphery of the pad body with a simple configuration while ensuring durability and low cost.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 is an external view of a drum device type electronic musical instrument according to a first embodiment of the present invention.

The apparatus comprises a plurality of (four) pad bodies 10 on the upper case 6. An annular light emitting unit 20 is arranged on the outer periphery of the pad body 10. The light emitting unit 20 includes a light source unit 30. As will be described later, in this device,
For example, when the pad body 10 is struck, the tones (snare drum, bass drum, cymbal, etc.) assigned to each pad are electronically sounded, and the light emitting unit 20 except the light source unit 30 appears to shine. It is like this. The sizes of the plurality of pad bodies 10 and the light emitting unit 20 may be different, but the basic configurations are the same.

The apparatus is further provided with a display unit 1 which is composed of a liquid crystal or a 7-segment LED for displaying various information, a slide type power switch unit 2 for turning the power on and off, and a rotary type parameter used for parameter setting. A rotary encoder 3 for setting, a function switch section 4 for setting various parameters such as volume and tempo, and a speaker section 5 for producing a drum sound are provided.

FIG. 2 shows a pad body 1 according to this embodiment.
0 is a plan view, FIG. 3 is an external perspective view of the light emitting unit 20 seen obliquely from above, FIG. 4 is a partial sectional view taken along the line AA of FIG. 1, and FIG. 5 is a partial sectional view taken along the line BB of FIG. It is a figure. In addition, the AA line and the BB line displayed in FIG.
It corresponds to that of.

As shown in FIGS. 4 and 5, the pad body 10
Is composed of a pad skin 11 and a pad plate 12.
The pad plate 12 is made of a metal such as iron or aluminum or a hard resin or the like and has a disk shape. The pad skin 11 is made of an elastic material such as rubber, and the upper surface of the pad surface 11a (the surface to be hit) is tapped. On the lower surface of the pad skin body 11, four protrusions 15 having hook-like tips are provided so as to project.
The pad skin 11 is fixed to the pad plate 12 by inserting and fitting the protrusions 15 into the holes provided at the corresponding positions of 2. The pad skin 11 may be fixed to the pad plate 12 by adhesion or the like.

Below the pad body 10, a film elastic body 42 is provided.
And the sensor support 40 is provided (FIGS. 4 and 5). The film elastic body 42 is made of a synthetic resin (for example, polypropylene) or the like that has elasticity and does not easily transmit vibration.
The film elastic body 42 is formed in a disk shape, and a substantially central portion in the radial direction thereof is a thick portion 42b. A thin film portion 42a is formed on the outer side in the radial direction from the thick portion 42b. Thin film part 4
The thickness of 2a is, for example, about 0.3 mm. Thin film part 42
The action of a will be described later.

The sensor support 40 is bonded to the lower surface of the film elastic body 42. The sensor support body 40 is a plate-shaped member having rigidity and is formed into a disk shape, and the outer edge portion of the sensor support body 40 has the film-formed elastic body 4.
The second thick portion 42b extends to the vicinity of the outer peripheral portion.

The thick portion 42b of the membrane elastic body 42 is
It may be a thin portion having the same thickness as the thin film portion 42a, without having to be thick. This is because there is no problem in terms of strength and maintenance because the sensor support 40 and the lower end portion 14b of the bridge body 14 described later are sandwiched and screwed.

The sensor support 40 is connected to the pad body 10 by the bridge body 14 together with the film elastic body 42 (FIGS. 4 and 5). The bridge body 14 is formed of a material having elasticity in the shape of a wide band in the circumferential direction, and is provided at, for example, three locations at equal intervals (FIG. 2).

The upper end 14a of the bridge body 14 is connected to the pad body 10. When the pad plate 12 is made of metal, it is formed by cutting and raising from the pad plate 12 main body, and when it is made of resin, it is integrally formed with the plate main body by a slide core type mold.

The bridge body 14 has a lower end portion 1 on the inner peripheral side thereof.
4b and the sensor support 40, the thick portion 4 of the membrane elastic body 42.
It is attached in the form of sandwiching 2b. Bottom edge 1
4b is fixed to the sensor support body 40 and the membrane elastic body 42 by two screws 13 for each bridge body 14. The bridge body 14 transmits the vibration caused by the impact of the pad body 10 to the sensor support body 40. Since the bridge body 14 is extended from the vicinity of the lower portion of the outer edge of the pad body 10 and formed wide in the circumferential direction as described above, the impact vibration is transmitted in a wide path so as to wrap around from the peripheral edge of the pad body 10, The "uneven sensitivity" in which the output varies depending on the position is effectively prevented.

A sensor section 41 is provided at the lower center of the sensor support 40. The sensor unit 41 is composed of a piezoelectric type piezoelectric sensor or the like, and detects impact vibration transmitted through the bridge body 14 and the sensor support body 40.

As shown in FIG. 3, the light emitting unit 20 includes
The light guide 21, the reflection cover 23, and the light source unit 30 are included. The light guide 21 and the reflection cover 23 are provided in the light source unit 30.
Is formed in a substantially annular shape by cutting out a part of the annular shape only in the space in which is arranged. The reflection cover 23 has a concave cross section and a concave portion (opening) faces upward, and the light guide 21 has a convex cross section and a convex portion faces downward. The convex portion of the light guide 21 is fitted into the concave portion of the reflecting cover 23, and is adhered to the mating surfaces SF1 and SF2 (FIG. 4).

The bottom surface of the reflecting cover 23 may be extended to the bottom surface RM1 of the annular groove RM corresponding to the light guide 21 of the upper case 6 and the reflecting cover 23. By doing so, it suffices that the mating surfaces SF1 and SF2 not be adhered to each other but be pressed and fitted together, and the assembling, maintenance, inspection, and replacement become easy.

The light guide 21 is made of a transparent resin such as polycarbonate or acrylic that transmits light. As will be described later, one end of the light guide 21 has a start end face 21 on which light is incident.
a, the other end is a termination surface 21b through which light reaches,
The light source unit 30 is fitted between the start end surface 21a and the end surface 21b.

FIG. 6 is a view showing a part of the upper case 6 together with the light source section 30. FIG. 7A is an exploded perspective view of the light source unit 30 inverted and viewed from diagonally above, and FIG. 7B is a partial perspective view of the upper case 6 where the light source unit 30 is attached and which is seen obliquely from above. It is a figure.

The light source section 30 is composed of an LED 31, an LED cover 32 and the like ((a) in the figure). LED cover 3
A U-shaped groove M1 is formed at 2. This groove M1
An LED 31, which is a light emitting body, is loosely inserted therein. A hook portion 33 is provided on an inner side surface (a surface facing the inner circumferential direction of the light emitting unit 20) 32c of the LED cover 32. The hook portion 33 is provided for attachment to the outer peripheral surface side of the outer peripheral side annular rib 6b protruding upward from the upper case 6.
A hook 33a is formed at the tip of the hook portion 33.

On the other hand, the upper case 6 is made of polystyrene or the like and is supported by the boss 7 of the lower case. The upper case 6 is formed with an inner peripheral side annular rib 6a on the inner peripheral side of the light emitting unit 20 and on the inner peripheral side of the inner peripheral side of the light emitting unit 20. The case-side annular groove RM is formed over the entire circumference by the annular rib 6b (FIGS. 4, 5, and 6 (b)). Outer annular rib 6b to which the light source unit 30 of the upper case 6 is attached
A locking groove M2 is formed on the outer surface of the (see FIG. 6).
(B)).

The light emitting unit 20 is arranged in the case side annular groove RM of the upper case 6. The light source unit 30 is reversed from the state of FIG. 6A, the LED cover 32 is inserted into the case side annular groove RM of the upper case 6, and the claw 33a of the hook portion 33 is formed.
By locking the LED to the locking groove M2 of the upper case 6,
The outer surface 32d of the cover 32 is pressed against the outer wall RM0 (FIG. 6B) of the groove RM by the elasticity of the hook portion 33, and the light source unit 30 is fixed to the upper case 6. At this time,
The light source unit 30 is located below the pad body 10. Accordingly, when the pad body 10 is hit, the light source unit 3
0 is less likely to be accidentally hit, and failures can be reduced. When the light source unit 30 is attached, the start end side surface 32 a and the end side surface 32 of the LED cover 32 are attached.
b is in contact with the start end surface 21a and the end surface 21b of the light guide 21. At that time, the LED 31 becomes the light guide 21.
Faces the starting end face 21a of the. In addition, the LED cover 32
Is made of a white synthetic resin or the like that easily reflects light. Therefore, when the LED 31 emits light, the light is emitted from the start end face 21.
The light is efficiently incident on the light guide 21 from a.

Like the LED cover 32, the reflecting cover 23 is also made of white synthetic resin or the like. Further, the outer peripheral surface 21d and the inner peripheral surface 21e of the light guide body 21 are processed to have high surface roughness (like a mirror surface). Therefore, light is likely to be reflected on the contact surface between the concave portion of the reflection cover 23 and the convex portion of the light guide 21, the outer peripheral surface 21d, and the inner peripheral surface 21e, and in particular, the light transmitted through the inside of the light guide 21. Is almost equal to or less than a predetermined angle (a large incident angle), it is almost totally reflected when it goes to a (very smooth) surface having a high surface roughness. Thereby, the incident light from the LED 31 is efficiently guided along the annular axial direction of the light guide body 21 by the so-called optical fiber light propagation principle.

The LED cover 32 is used not only for protecting the mirror-finished portion of the light guide 21, but also for further improving the light propagation efficiency. That is, it is used to reduce light leakage caused by suppressing the mirror processing rate for cost reduction or the like by reflecting the light on the white surface of the LED cover 32 and re-entering the light into the light guide 21. In particular, the light guide 21
In the vicinity of the starting end face 21a of the light guide, since the light input angle to the wall surface (outer peripheral surface 21d, inner peripheral surface 21e) is close to a right angle (incident angle is close to zero), even if the light guide body 21 alone is a mirror surface, light leaks. Cheap. However, the white surface of the LED cover 32 enables light re-input.

Further, as described above, the LED cover 32
Since the terminal end side surface 32b of the LED is in contact with the terminal end surface 21b of the light guide 21, and the LED cover 32 is white,
The incident light that has reached the end surface 21b along the axis is almost totally reflected and travels in the opposite direction (on the side of the start surface 21a). Due to this and the action of the LED cover 32, the light emitting surface 21c described later can be made to emit light with considerably uniform brightness over the entire length from the start end surface 21a to the end surface 21b of the light guide 21.

On the other hand, the upper surface of the light guide body 21 is formed as a light emitting surface 21c having a slightly rough surface roughness (like frosted glass), which is inclined slightly downward toward the outer periphery for visibility. ing. By roughening the light emitting surface 21c, the light traveling from the inside of the light guide 21 to the light emitting surface 21c is likely to be diffusely reflected, and not only the light having a small incident angle (close to a right angle) to the light emitting surface 21c. That is, even light with a relatively large incident angle leaks to the outside without being totally reflected.
Although the brightness slightly decreases at a position separated from the start end surface 21a and the end surface 21b by the amount of leakage, the light emitting surface 21c seems to be shining to the player. The rough surface treatment is performed by, for example, the bead blast method.

The light guide 21 is provided with three stays 22 for attaching the light emitting unit 20 to the upper case 6. The stay 22 is integrally formed on the inner peripheral surface 21e of the light guide body 21 and is adjacent to the bridge body 14
They are provided at equal intervals so as to be located between and. Stay 2
2 is fixed to the annular rib 6a with a screw 24 so that the lower surface of the stay 22 and the upper surface of the annular rib 6a sandwich the thin film portion 42a of the film elastic body 42 (FIG. 4). As a result, the light emitting unit 20 is fixed to the upper case 6.

On the upper surface 22a of the stay 22, a cushioning material 22b made of sponge, urethane rubber or the like is attached (FIG. 4). When not hitting after assembly, the upper surface 22a of the stay 22 and the lower surface 10a of the pad body 10 are slightly separated from each other, and the cushioning material 22b is interposed in this separated portion. The upper surface of the cushioning material 22b is the lower surface 10a of the pad body 10.
May be slightly separated. On the other hand, when the pad body 10 is hit, the stay 22 and the cushioning material 22 b are
By acting as a stopper against the pad body 10
Excessive displacement is suppressed. By the action of the cushioning material 22b, the impact sound generated between the upper surface 22a and the pad body 10 is also suppressed. The outer peripheral portion of the pad body 10 is also the light guide body 21.
Is slightly separated from.

After all, the pad body 10 is substantially separated from the light emitting unit 20 when not hitting after the final assembly. Therefore, the pad body 10, the sensor section 41, the sensor support body 40, and the like are joined to the upper case 6 only via the thin film section 42a of the elastic membrane 42 and are floated with respect to the upper case 6. ing. As a result, as far as vibration transmission is limited, the pad body 10, the sensor portion 41, the sensor support body 40, and the like act independently of the upper case 6 as if they were floating in the air. That is, the impact or vibration from the upper case 6 (for example, due to the impact of another pad or the impact of the upper case 6 itself) is almost absorbed and blocked by the thin film portion 42a, and the vibration transmission to the sensor portion 41 is effectively suppressed. As a result, jumping is structurally prevented.

On the other hand, the pad body 10 and the sensor support body 4
The bridge body 14 is connected to 0 and the pad body 10
Is freely vibrated by striking, and the vibration caused by striking the pad itself is transmitted to the sensor unit 41 through the bridge body 14 and the sensor support body 40, so that striking detection is not hindered. Further, as a result of the excessive displacement of the pad body 10 being suppressed by the stay 22 and the cushioning material 22b at the time of striking, damage and failure are prevented, and generation of unsuitable noise as a drum sound source is eliminated. The upper case 6 and the pad body 1
If 0 can always maintain a non-abutting relationship, the cushioning material 22b can be omitted.

This device is manufactured as follows.

First, the sensor portion 41 is attached to the sensor support 40. Next, the outer peripheral portion of the thin film portion 42a is placed on the annular rib 6a of the upper case 6. On the other hand, the light guide 21 and the reflection cover 23 are fitted. Then, the stay 22 is fixed to the annular rib 6a with the screw 24 sandwiching the thin film portion 42a. After that, the device body is turned over and placed on the flipped pad body 10, the sensor support body 40 is placed while being aligned with the membrane elastic body 42, and the lower end portion 1 of the bridge body 14 is screwed with the screw 13.
Stick to 4b. Next, the device body is placed on the front side, and the light source unit 30 is attached to the upper case 6. The light source unit 30 is the light guide 2.
It is just fitted between the starting end face 21a and the terminating end face 21b.

The tone control and the light emission control of the light emitting unit 20 are performed as follows.

FIG. 7 is a block diagram showing the configuration of the main part of the control system of this electronic musical instrument. A hit detection signal from each sensor unit 41 in the four pad bodies 10 is input to the CPU 8, shaped, and output to the sound source unit 9 as a sound source instruction signal, and a drum sound is generated by using this as a trigger. At that time, the light emitting unit 20 around the hit pad body 10
Also emits light at the same time.

According to the present embodiment, the light emitting unit 20
Then, since the incident light from the LED 31 is guided along the axial direction of the light guide body 21 by using the light propagation principle of the optical fiber, and is appropriately emitted from the light emitting surface 21c, the light emitting unit. It is possible to illuminate the entire circumference except a part of 20. Further, since the light emitting mode can be made different depending on the mode in which the light emitting surface 21c is provided, it is easy to realize decorative light emission suitable for the drum device. Further, it is suitable for a batting instruction display, a so-called navigation display, and it is easy to realize a game function such as a rattle. Furthermore, since it is possible to illuminate the whole with the minimum number of light emitters, not only the configuration is simple and the cost can be reduced, but also
It has few failures and is durable. Therefore, it is possible to emit light around the pad body with a simple configuration and a minimum light source.
Moreover, the light source unit 30 includes the light guide 21 and the reflection cover 23.
Since it is easy to attach and detach from the upper case 6 separately from the above, it is easy to perform maintenance, change the color of the LED 31, and change the design. Therefore, it is possible to illuminate the entire outer periphery of the pad body with a simple configuration while ensuring durability and low cost.

Further, the pad body 10, the sensor support body 40, the sensor portion 41, etc. are capable of suppressing the vibration transmission, and the thin film portion 42.
Since it is floated and supported by the upper case 6 by a, it is possible to ensure independence from the upper case 6 in terms of vibration transmission, and structurally suppress jumping. Further, since the bridge body 14 is extended from the vicinity of the lower portion of the outer edge of the pad body 10 and is formed wide in the circumferential direction, impact vibration is transmitted in a wider path so as to go around from the peripheral edge, and “uneven sensitivity” is effective. Therefore, a uniform output can be obtained regardless of the hitting position. Therefore, it is possible to effectively suppress the vibration transmission from the case body and structurally prevent the occurrence of jumping, and it is possible to effectively reduce the sensitivity unevenness due to the hitting position.

(Second Embodiment) In the present embodiment,
The configuration of the light emitting unit and the method of attaching it to the upper case are different from those in the first embodiment. Appearance of the device, pad body 10, sensor support body 40, sensor portion 41, bridge body 1
4 and the filmed elastic body 42 are the same as those in the first embodiment.

FIG. 8 is a partial cross-sectional view showing the structure of the electronic musical instrument according to the present embodiment, and corresponds to the partial cross-sectional view taken along the line AA of FIG. 1 in the first embodiment.

The light emitting unit 120 comprises a light guide 121, a reflecting cover 123 and a light source section 30. The light guide body 121 is different from the light guide body 21 in the first embodiment in that the stay 22 is not provided. Reflective cover 123
Differs from the reflection cover 23 in the first embodiment in that it has a positioning protrusion 123a. The manner of fitting the light guide 121 and the reflecting cover 123, the configuration of the light source unit 30, and the point that the light emitting unit 120 has a substantially annular shape are the same as in the first embodiment.

The positioning projection 123a is formed over the entire lower portion of the outer peripheral portion of the reflecting cover 123, and a groove is formed in the upper case 106 so as to be fitted thereto. The light emitting unit 120 has an outer peripheral surface and a ridge 123 for positioning.
At a, it is adhesively fitted and fixed to the upper case 106. At the time of mounting, the positioning protrusion 123a serves as a temporary fixing function, and the positioning is performed with respect to the upper case 106, and further, the fixing strength with the upper case 106 is improved.

In the first embodiment, the film-formed elastic body 42 is formed by the stay 22 of the light guide 21 and the annular rib 6a of the upper case 6.
The thin film portion 42a is sandwiched between the upper case 106 and the lower case 50 in the second embodiment. The lower case 50 is made of polystyrene or the like, and has a hole 51 for allowing the lead wire 43 of the sensor unit 41 to pass through at the bottom below the sensor unit 41.

The thin film portion 42a of the membrane elastic body 42 is sandwiched between the lower surface of the thin film holding portion 106a of the upper case 106 and the upper surface of the thin film holding portion 50a of the lower case 50, and the thin film portion 42a is fixed by the screw 124. To be done. As a result, the membrane elastic body 42 is moved to the upper case 106 and lower case 50.
Fixed to.

In this embodiment, the upper case 106 is used.
Upper surface 106b of the thin film holding portion 106a and the cushioning material 22b
Functions as a stopper similar to the upper surface 22a of the stay 22 in the first embodiment, and suppresses excessive displacement of the pad body 10. Note that the tone control and light emitting unit 1
The light emission control of 20 is the same as that of the first embodiment.

This device is manufactured as follows.

First, the sensor portion 41 is attached to the sensor support 40.
The membrane elastic body 42 and the lower end portion 14b of the bridge body 14 are fixed together, and the pad body 10 (the pad plate 12 thereof) and the upper end portion 14a of the bridge body 14 are fixed together to form one assembly. Then, the assembly is turned over, and the thin film holding portion 1 of the upper case 106 turned upside down.
The assembly is placed so that the thin film portion 42a is placed on 06a. Then, the lower case 50 is placed so that the thin film holding portion 50a of the lower case 50 sandwiches the thin film portion 42a, and the screw 124
Tighten. The light guide 121 and the reflecting cover 123 may be attached to the upper case 106 either before or after the assembly is attached. The attachment of the light source unit 30 is similar to that of the first embodiment.

According to the present embodiment, the light emitting unit 12
0 has the same effect as the first embodiment with respect to a simple configuration, decorative light emission around the pad body with the minimum light source, and easy realization of the navigation function and the game function. You can

In addition, the assembly of the pad body 10, the sensor support 40, the sensor portion 41, etc. is limited to the thin film portion 42a capable of suppressing vibration transmission.
Since it is floated and supported at 0, to prevent the occurrence of jumping,
The same effect as that of the first embodiment can be obtained.
Further, the bridge body 14 can achieve the same effect as that of the first embodiment with respect to uniform hit detection.

Further, since the lower case 50 has only a small hole 51 and has a high airtightness and there are few restrictions in shape, it is easy to make the lower case 50 also serve as a speaker box. In addition to being able to simplify the structure and eliminate the large holes, it also contributes to the improvement of sound quality.

(Third Embodiment) FIG. 9 is a partial cross-sectional view showing the structure of the electronic musical instrument according to the present embodiment (FIG. 9A) and a partial plan view of the fixed contact film (FIG. b)). The same figure (a) corresponds to the fragmentary sectional view which follows the AA line in Figure 1 in 1st execution form.

In the present embodiment, the impact vibration is detected by the contact switch instead of the piezoelectric type piezoelectric sensor.
The structure of the light emitting unit 120 and its attachment to the upper case 506 are the same as those in the second embodiment.

As shown in FIG. 7A, the pad body 310
Is composed of a pad skin 311 and a pad plate 312. The pad plate 312 is made of an iron plate or the like and has a disk shape. The pad skin 311 is made of an elastic material such as rubber, and its upper surface, a hitting surface 311a (struck surface), is tapped. A hook-shaped protrusion 315 is projected at a few points on the lower surface of the pad skin 311. By inserting the protrusion 315 into a hole 315a provided at a corresponding position of the pad plate 312, the pad skin is removed. The body 311 is fixed to the pad plate 312.
The pad skin 311 may be fixed to the pad plate 312 by adhesion or the like.

The pad body 310 is disposed on the tray-shaped bottom portion 506c of the upper case 506. The fixed contact film 301 is attached to the upper surface of the bottom portion 506c.
As shown in, the fixed contact film 301 is provided with screw through holes 313A and stopper through holes 506bA at appropriate positions. The pad body 310 is a bridge body 314.
Is connected to the upper case 506 via the. The lower portion of the bridge body 314 is fixed to the bottom portion 506c with screws 313, and the upper portion thereof is fixed to the lower surface of the pad skin body 311. A plurality of (for example, three) bridge bodies 314 are provided at equal intervals. The bridge body 314 has elasticity,
When hit, the pad body 310 can be slightly displaced in the vertical direction.

On the upper surface of the bottom portion 506c of the upper case 506, the stopper 5 is penetrated through the stopper penetrating hole 506bA.
06b is projected. A plurality of stoppers 506b are provided at positions close to the outer periphery of the pad body 310 (for example, three at equal intervals), and at the time of striking, the stoppers 506b come into contact with the cushioning material SS attached to the pad skin body 311 to make the pad body 310 contact. Prevent excessive displacement.

The outer edge portion 311b of the pad skin 311 is bent downward. A plurality of switch portions 302 (e.g., 8 places) are provided in the vicinity of the outer peripheral portion of the fixed contact film 301 and at a position corresponding to the outer edge portion 312b of the pad plate 312. The switch unit 302 includes a pair of fixed contacts 302M and a movable contact 302F provided on the fixed contact film 301. The fixed contact 302M has a comb-shaped pattern, and the switch opens and closes when the movable contact 302F contacts and separates. The upper portion of the movable contact 302F is in contact with the outer edge portion 312b of the pad plate 312, and the movable contact 302F is pushed down as the pad body 310 is displaced downward. When the movable contact 302F is pressed, the fixed contact 3
Abutting on 02M, the impact is detected. The movable contact 3
The 02F may be configured as a two-make type and the striking strength may be detected.

The tone control and the light emission control of the light emitting unit 120 are performed as follows. The configuration of the control system of this device is the same as that of the first embodiment and is as shown in FIG.

FIG. 10 is a diagram showing a flowchart of the main processing in this embodiment. First, initialization is carried out (step S101), and musical tone parameter (change) setting processing such as tone color is carried out (step S102). Next, the pad switch process of FIGS. 11 and 12 described later is executed (step S103), and the process returns to step S102.

11 and 12 show step S1 of FIG.
It is a figure which shows the flowchart of the pad switch process performed by 03. Note that the switch unit 302 is actually 8
In order to simplify the explanation in this processing, a case will be described as an example where three switch units 302 are provided on the circumference at equal intervals. Hereinafter, these three switch units 30
2 is referred to as "SWa, SWb, SWc". Also, SW
In addition to a, SWb, and SWc, a switch unit (SWx) (not shown) that is turned on (with a shallow stroke) prior to these when hit is provided.

FIG. 13 is a diagram showing an output circuit of the switch section. The outputs of the switch units SWa and SWb are connected to the inputs of the AND circuit 191, and the outputs of SWb and SWc are AN.
It is connected to the input of the D circuit 192, and the outputs of SWc and SWa are connected to the input of the AND circuit 193. The outputs of the AND circuits 191, 192, 193 are OUT, respectively.
2, OUT3, OUT4. SWa, SW
The outputs of b and SWc are both connected to the input of the OR circuit 194, and the outputs of the AND circuits 191, 192 and 193 are all connected to the input of the NOR circuit 195. The output of the OR circuit 194 and the output of the NOR circuit 195 are connected to the input of the AND circuit 196, and the output of the AND circuit 196 is OUT1. The output of the switch unit SWx is OUT5.

In the flowchart of FIG. 11, first,
It is determined whether or not there is an on-event of any of the switch contacts (step S201). If there is no on-event of any of the switch contacts, this processing is terminated,
If there is an on event of any of the switch contacts, the switch having the on event is searched, and the type of musical instrument to be sounded (for example, snare drum) is specified based on the switch (step S202). Then, the specified musical instrument type is substituted into the variable n indicating the musical instrument name (step S203).

Next, it is determined whether or not only one of SWa, SWb and SWc is turned on (step S2).
04). This is determined in the state of OUT1 in FIG.
When OUT1 becomes "H", SWa, SWb, SW
It is determined that only one of c is turned on. If the result of the determination is that "only one of SWa, SWb, and SWc has been turned on" does not apply, SWa, SW
It is determined whether or not only two of b and SWc are turned on (step S205). This is the OUT of FIG.
When it is discriminated in the state of 2, 3, 4 and only one of OUT2, 3, 4 becomes “H”, SWa, SWb,
It is determined that only two of SWc are turned on.
If the result of the determination does not correspond to “only two of SWa, SWb, and SWc are turned on”, SWa,
It is determined whether all of SWb and SWc are turned on (step S206). This is OUT2, 3 in FIG.
When all of OUT2 and OUT3 are "H", it is determined that all of SWa, SWb, and SWc are turned on.

As a result of the determination in step S204, SW
When only one of a, SWb, and SWc is turned on, the light emission process and the tone generation process of the musical instrument n are performed (step S207). That is, in the light emission process, first, a control signal is sent to cause the LED 31 (double-headed light emitting diode BLD in the example of FIG. 17 described later) of the light source unit 30 of the light emitting unit 120 to emit light. In the pronunciation process, the specified musical instrument n
The sound source is instructed to sound, and the volume is set to "small" and the tone color is set to "mellow". To make the timbre "mellow", the cutoff frequency of the low-pass filter may be lowered to the low frequency side. After that, this processing ends.

As a result of the determination in step S205, SW
If only two of a, SWb, and SWc are turned on, it is determined whether or not the musical instrument n is producing sound (step S2).
08). As a result of the determination, when the musical instrument n is producing a sound, the volume of the musical instrument n is set to "medium", the tone color thereof is set to "medium" (step S209), and this processing is ended. To make the timbre "medium", the cutoff frequency of the low-pass filter may be set to an intermediate frequency. On the other hand, when the musical instrument n is not producing sound, the light emission process and the musical tone production process of the musical instrument n are performed (step S210). That is, as in step S207, a control signal is sent to cause the LED 31 to emit light, and the sound source of the designated musical instrument n is instructed to be sounded. However, at that time, the volume is set to "medium" and the tone color is set to "medium". After that, this processing ends.

As a result of the determination in step S206, SW
If all of a, SWb, and SWc are turned on, the musical instrument n
It is determined whether or not is being generated (step S211). As a result of the determination, if the musical instrument n is producing a sound, the volume of the musical instrument n is set to "loud" and its timbre is set to "brilliance" (step S212), and this processing is ended. To make the timbre "brilliance," the cutoff frequency of the low-pass filter may be set to the high frequency side. On the other hand, if the musical instrument n is not sounding, the light emission process and the musical tone generation process of the musical instrument n are performed (step S213). That is, as in step S207, a control signal is sent to cause the LED 31 to emit light, and the sound source of the designated musical instrument n is instructed to be sounded. However, at that time, the volume is set to "high" and the tone is set to "brilliance". After that, this processing ends.

As a result of the discrimination in step S206, "S
If all of Wa, SWb, and SWc are turned on ”, the switch unit SWx is turned on (OUT
5 is "H"), learning-based pronunciation (e.g., generation of a predetermined musical tone for test hitting) is performed based on the musical tone parameter setting made in step S102 of FIG. 10 (step S214), and this processing is performed. To finish.

According to this process, the light emitting unit 120 emits light when the pad body 310 is hit, and a musical sound is generated according to the hitting mode. For example, SWa, SWb, S may be hit or weakly hit near the outer edge of the pad body 310.
When one of the Wc's is turned on, the musical instrument n is pronounced with a soft tone at a low volume, and SWa, SW are hit by a hit from the center or a hit of moderate strength.
When two of b and SWc are turned on, the musical instrument n is sounded with a tone of medium volume and medium hardness, and the SW is swung by a hit or a strong hit at the central portion of the pad body 310.
When all of a, SWb, and SWc are turned on, the musical instrument n is sounded with a voluminous tone with a large volume.

According to the present embodiment, the light emitting unit 12
With 0, it is possible to achieve the same effect as that of the first embodiment regarding a simple structure and decorative light emission around the pad body with the minimum light source.

Further, since not only the musical sound control but also the light emission control is performed in response to the hit detection, it is possible to expand the utilization mode such as obtaining a visual effect corresponding to the hit.

In the first, second, and third embodiments, the light emitting units 20 and 120 are not limited to emitting light at the time of striking, but are made to emit light for a striking instruction for practice like an optical keyboard. May be. Further, it may be made to always emit light as a decoration, or may be applied so that a game such as a mole beating can be played.

In the first, second and third embodiments, the number of light source sections 30 (or the number of LEDs 31) may be plural, as will be exemplified later. In this case, a reflecting portion may be provided at a position farthest from the light source unit 30 of the light guide body 21 so that the reflected light returns to the incident position.

In the first, second and third embodiments, the light emitting surface 21c is finished to have a uniformly rough surface roughness, but at least a part of the visually recognized surface is roughened. The surface treatment may be performed, and the mode is arbitrary. Since this affects the visual effect, it can be appropriately changed from the viewpoint of design, and the design can be easily changed.

(Fourth Embodiment) In the first, second, and third embodiments, an example in which the present invention is applied to a drum device type electronic musical instrument is shown. However, in the present embodiment, a keyboard device type is used. An example applied to the electronic musical instrument of is shown.

FIG. 14 is a partial plan view of a keyboard device type electronic musical instrument according to this embodiment. FIG. 15 shows E of FIG.
It is sectional drawing which follows the -E line. 16 is a cross-sectional view taken along the line FF of FIG. 14 (FIG. 16A) and a cross-sectional view taken along the line GG of FIG. 14 (FIG. 16B). In the present embodiment, the front end direction of the key, that is, the player side of the key is referred to as the front, and the rear end direction of the key, that is, the base end side of the key when viewed from the player is referred to as the rear side.

The key unit of this keyboard device is formed for each octave, and although not entirely shown, it is composed of a black key unit integrally molded of synthetic resin and a white key unit divided into two. The black key and white key units have a common base end 91.
, And the common base end portion 91 has a three-layer structure (FIG. 15).

As shown in FIG. 14, a white key 92 and a black key 93.
Are connected to the common base end portion 91 via connection portions 94 and 95, respectively. The connection parts 94 and 95 have a white key 9.
2. The black key 93 is swingable in the key pressing direction (vertical direction). The white key 92 is made of a transparent material, and the black key 93 is made of a black translucent material that transmits light.

In this embodiment, a key-depression switch (not shown) is provided, but since the structure for detecting a key-depression is the same as the conventional one, the description thereof will be omitted. Further, although an actuator for pressing the key switch and a key guide for restricting the swinging of the keys in the key arrangement direction are provided on the key,
The illustration of the configuration of the portion not related to the light emission is also omitted.

The white key 92 is provided with an optical fiber 96. The optical fiber 96 passes above the common base end portion 91, and its front end closely faces the rear end surface 92f of the key body of the white key 92. The LED 9 is provided at the root of the optical fiber 96.
8 is provided, the light of the LED 98 is conducted through the optical fiber 96, and is incident on the key body from the rear end surface 92f of the white key 92. An optical fiber 97 provided for the black key 93
Is similarly configured.

As shown in FIG. 16 (a), the white key 92 is formed in a substantially U-shaped cross section, and step portions 92d are provided symmetrically at the left and right ends of the lower surface of the key pressing surface (upper surface). ing.
Although the entire surface of the white key 92 has a high surface roughness (similar to the outer peripheral surface 21d and the inner peripheral surface 21e of the light guide 21 in the first embodiment), the lower surface 92d of the step portion 92d is treated.
a, both side surfaces 92a and 92b, and a sloped surface 92c at the lower end of the tip portion
(FIG. 15) is a diffuse reflection surface with a slightly roughened surface roughness (similar to the light emitting surface 21c in the first embodiment).

Therefore, when the light passing through the inside of the white key 92 is directed to a surface having a high surface roughness at an incident angle of a predetermined value or more, it is almost totally reflected. Thus, the light incident on the rear end surface 92f of the white key 92 from the LED 98 is efficiently guided in the tip direction along the longitudinal axis of the white key 92 according to the so-called optical propagation principle of an optical fiber. On the other hand, since the lower surface 92da of the step portion 92d, both side surfaces 92a, b, and the inclined surface 92c at the lower end of the tip portion are roughened, incident light directed to these surfaces is likely to be diffusely reflected, and the incident angle to these surfaces is small. Not only light but also light with a relatively large incident angle leaks to the outside without being totally reflected. As a result, when viewed from the player, both side surfaces 92a, 92b are seen from the position where both side surfaces 92a, 92b are visible.
It seems that a and b are shining directly. Furthermore, white key 9
Since the key pressing surface of 2 is transparent, the lower surface 92 of the step portion 92d is
The light diffusely reflected by the side surfaces 92a, 92b and the inclined surface 92c including da is transmitted through the inside of the white key 92, leaks to the outside through the key pressing surface, and is visually recognized. Therefore, even from a position where these surfaces are not directly visible, these surfaces can be seen to shine through the key pressing surface.

Instead of the lower surface 92da of the step portion 92d or in addition to the lower surface 92da of the step portion 92d, the lower surface 92e of the lower end portion of the white key 92 may be similarly roughened. Further, the lower surface 92da of the step portion 92d or both side surfaces 9
Only one of 2a and 2b may be surface-roughened. If the inclined surface 92c at the lower end of the tip portion is set at an angle of about 45 °, light can be reflected upward even if the surface roughness is high and the light can be visually recognized. No need.

As for the black key 93, as shown in FIG. 16B, only the lower surface 93da of the step portion 93d corresponding to the lower surface 92da of the step portion 92d of the white key 92 is roughened,
The other surfaces are processed to high surface roughness. In the case of the black key 93, the transparency is lower than that of the white key 92, but since the total length is short,
Only the diffuse reflection of the incident light on the lower surface 93da is sufficiently visible from the key pressing surface. Instead of the lower surface 93da of the step portion 93d or in addition to the lower surface 93da of the step portion 93d,
The lower surface 93e of the lower end portion of the black key 93 may be similarly roughened.

In the present embodiment, a musical sound is generated in accordance with the detected key-pressing operation, like a so-called optical keyboard. At that time, not only the tone control but the light emission control is performed. For example, it may be made to emit light for a key depression instruction for practice, or may be made to always emit light as a decoration.

According to the present embodiment, the key is made of a transparent material, and the light propagating principle of the optical fiber is used to guide the incident light from the rear end of the key in the direction of the front end of the key and from the irregular reflection surface. Since the light is appropriately emitted, a desired part of the key can be illuminated with a simple structure. In addition, since the part that emits light and the manner in which it is visually recognized vary depending on the position and the way in which the irregular reflection surface is provided, it is possible to freely set the optimal light emission mode according to the model or the like. Therefore, the degree of freedom in design is high, and it is easy to emit light decoratively. Therefore, with a simple configuration,
The key can be illuminated in any desired manner.

Further, since not only the musical tone control but also the light emission control is performed in response to the hit detection, it is possible to expand the utilization mode such as obtaining a visual effect according to the hit.

The portion on which the irregular reflection surface is provided is not limited to the one exemplified above, and may be set appropriately from the viewpoint of design. At this time, the light incident on the key is visually recognized by directly leaking from the irregular reflection surface to the outside (for example, both side surfaces 92a and 92b), and also diffusely reflected by the irregular reflection surface and transmitted through the inside of the key to press the key. Since it can be seen by leaking to the outside through the surface (for example,
The lower surface 92da of the step portion 92d) and at least one of these may be visually recognized.

Although the white key 92 is made of a transparent material and the black key 93 is made of a semi-transparent material, the entire key does not necessarily have to be made of a light guide, and at least a part thereof is made of a light guide. If you have. For example, a transparent resin may be attached to the upper surface of the key body of the white key 92, and this transparent resin may be used as a light guide portion for light emission recognition. In such a case, the optical fiber 9
6 and the light emitting portion instead of the light emitting portion 6 are configured to emit light toward the transparent resin portion which is the light guide portion, and the irregular reflection surface may be provided in the transparent resin portion which is the light guide portion.

In the first embodiment, the light source section 30
Although the number of the LEDs 31 is one, the invention is not limited to this. For example, two LEDs facing each other
May be provided. FIG. 17 shows another configuration example of the light source unit (light source unit 30 ′).

The light source section shown in FIG. 17 has another structure for displaying a batting instruction (navigation function display) on the electronic drum and / or visually recognizing the batting to improve the learning effect, and to increase the efficiency of the light emitting function. This is an example, and in a word, it shows an embodiment in which light from a light source such as an LED is made incident on both the start end face 21a and the end face 21b of the light guide 21. In the figure, the same elements as those of the light source unit 30 are denoted by the same reference numerals as those in FIG.

As shown in FIG. 17A, the light source section 30 '.
The LED cover 320 has a U-shaped groove M having a substantially uniform cross section from one end surface 32au to the other end surface 32bu.
U is provided. In the center of the groove MU, a retaining protrusion M after the double-headed light emitting diode BLD, which is a bipole LED, is attached at the lower end of the drum outer wall (upper end in the figure)
2 is provided, and a BLD guide groove M3 extending in the up-down direction is provided on the wall surface of the facing portion thereof.

When the BLD is inserted into the cover 320, B
The guided protrusion BL1 provided on one side surface of the LD is guided by the groove M3, the BLD is inserted into the groove MU, and when the BLD is completely fitted, the lower end surface BL2 of the BLD is locked to the protrusion M2. In this state, the light source unit 30 'is turned upside down and fitted to the light emitting unit 20 in the same manner as in the case of the light source unit 30 described above.

By the way, in the BLD, two light emitting diodes are internally connected as shown in FIG. 17 (b) and the outside is hardened with a resin, and the appearance is as shown in FIG. 17 (a) or (c). Is composed of. The both ends in the longitudinal direction of the BLD are shaped like the tip of a cannon bullet, which serves as a lens and is shaped so that the light collecting angle (solid angle) is 20 to 80 degrees.

This double-headed light emitting diode BLD is custom-made when it is not commercially available. In order to reduce the cost, the LED cover may be configured as an LED cover 324 as shown in FIG. FIG.
It is a back view which looked at the cover 324 from the lower part. For example, a structure corresponding to the cover 320 and a structure symmetrical to the cover 320 are formed by connecting the surfaces corresponding to the other end surface 32bu of the cover 320 as connecting portions. in this case,
Since only one hook portion 33 is required, one hook portion 33 is provided at the center. In this configuration, the left and right LEDs 3
By fitting Nos. 1 and 31 into the groove M1 as shown in the figure, a double-headed light source unit is completed.

According to the configuration of FIG. 17, it is possible to secure brighter and more uniform brightness than the configuration of FIG.

In the first embodiment, three stays 22 having the same structure are provided at equal intervals, but the number and the form are not limited to this. For example,
Two stays 22 may be provided at one of the three places, or the shape may be different from that of the other stays 22. As a result, the positional relationship between the light guide 21 and the upper case 6 in the circumferential direction is uniquely determined, which facilitates positioning and facilitates assembly work. Also, stay 22
It becomes difficult to break because there are many.

In the first, second and third embodiments, the manufacturer's name "BONG" is attached to the light emitting surface (21c etc.).
Write various characters (engraving, embossing) such as instrument names such as "O" and "KONGA", explanation of representative functions such as "navigate function", and "use 1, 2, 3, 4" You may This makes it possible to increase the visual recognition effect when the light is emitted.

(Fifth Embodiment) FIG. 18 is an exploded perspective view showing the structure of a drum device type electronic musical instrument according to a fifth embodiment of the present invention.

This electronic musical instrument roughly includes a case body 50.
6, a light emitting unit 520 including a light source unit 530, a pad body 510 and the like are assembled. This electronic musical instrument is provided with four pad bodies, and although the sizes are large as shown in the figure, the configuration is the same for both. Light source 5
The arrangement and configuration of 30 are the same as those of the light source unit 30 in the first embodiment. The light source unit 530 may include two or more LEDs. In addition, the light source unit 530
There may be a plurality of itself.

FIG. 19 is an exploded perspective view of the light emitting unit 520 in this electronic musical instrument. In the figure, the light source unit 5
Illustration of 30 is omitted. The same figure (b) is the same figure (a)
FIG. 3 is an enlarged view of the FA unit of FIG.

The light emitting unit 520 is constituted by attaching a tape material 524 (light reflecting member) to the light guide 521 except for the light source section 530. The light guide 521 is formed in a substantially annular shape with a part of the outer periphery cut out, and the lower edge is a ridge 523. The ridge portion 523 is formed in a tapered shape so as to become thinner as it goes downward. The light guide 521 is provided with four stays 522 to be attached to the case body 506. The stay 522 is formed integrally with the inner peripheral surface 523b of the protruding portion 523. The upper surface of the light guide body 521 is a light emitting surface 521c (surface) similar to the light emitting surface 21c in the first embodiment.

On the lower surface 523c of the ridge 523, as shown in FIG. 13B, a wavy serrated surface is formed. The ridgeline of this wave-shaped mountain runs along the radial direction of the light guide 521. The distance (peak-peak) in the height direction of the wave-shaped peaks and valleys is about 0.5 mm (preferably 0.3 to
It is set to about 1.0 mm). The light from the light source unit 530 travels along the longitudinal direction of the light guide 521, but since the ridgeline of the wave-shaped mountain is orthogonal to this, part of the incident light reflected by the mountain slope on the lower surface 523c is upward. Head to. This increases the amount of light emitted from the light emitting surface.

FIG. 20 is a partial cross-sectional view in the vicinity of the fitting portion between the ridge portion 523 of the light guide 521 and the case body 506.

The tape material 524 has a thickness t1 of about 1.5 m.
m (preferably 1 mm to 2 mm). The tape material 524 is made of a highly elastic material, for example, a resin foam material, and is made of a material such as white or milky white that easily reflects light. To attach the tape material 524 to the light guide 521, first, a double-sided adhesive tape made of a non-foaming material is attached (not shown) to the upper surface of the tape material 524 (the surface facing the ridge 523). ) Then, as shown in FIG. 20 (a), the outer peripheral surface 523a, the inner peripheral surface 523b, and the lower surface 523c are bonded so as to cover the protrusions 523 over substantially the entire circumference. Further, the light source unit 530 is attached to the light emitting unit 5
20 are manufactured.

As shown in FIG. 18, the case body 506 is provided with four holes 513 and four holes 515. Further, as shown in FIG. 20B, in the case body 506, a concave portion 506a (light guide body holding portion, holding portion) which is a substantially annular groove is provided at a position facing the protrusion 523 of the light guide 521. Are formed. As shown in FIG. 20B, the pad body 510 is provided with a sensor support 540 formed in a disk shape by a plate member having rigidity. The sensor support 540 includes:
A sensor unit 541 similar to the sensor unit 41 in the first embodiment is attached. As shown in FIGS. 18 and 20 (b), the pad body 510 also has four protrusions 511 protruding downward. The other structure of the keyboard instrument is basically the same as that of the first embodiment.

In order to attach the light emitting unit 520 and the pad body 510, first, the ridge portion 5 of the light emitting unit 520 is attached.
The case body 506 in which 23 is attached to the tape material 524.
The light emitting unit 52 is fitted and press-fitted into the recess 506a of the
0 is held by the case body 506. Here, as shown in FIG. 20B, when the tape material 524 is not provided, a gap t2 is formed between the protrusion 523 and the recess 506a. The gap t2 is set to about 1 mm, and is set to a value at least smaller than the thickness t1 of the tape material 524 (t1> t2). That is, when the protrusion 523 having the tape material 524 attached thereto is fitted into the recess 506a, the tape material 524 elastically deforms (shrinks).
By doing so, the gap is almost filled. As a result, mechanical noise and the like due to the gap between the light emitting unit 520 and the case body 506 are suppressed.

Particularly, as described above, the ridge portion 523 is formed in a taper shape, and therefore the tape material 524 is mainly used.
Both upper parts 524a strongly abut on the recess 506a. At that time, as shown in FIG.
The root part of 23 is S1, S2 with respect to the recess 506a.
A gap of (S1 is substantially equal to S2) is generated. This further enhances the effect of preventing chattering of mechanical noise and the like.

Next, the stay 522 of the light guide body 521 is screwed into the hole 515 of the case body 506 with the screw 525 (see FIG. 18), so that the light emitting unit 520 is made into the case body 5.
It is fixed at 06. After that, the protrusion 5 of the pad body 510
The pad body 510 is fixed to the case body 506 by penetrating 11 through the hole 513 of the case body 506. In this way, the light emitting unit 520 and the pad body 510
Is assembled to the case body 506.

According to the present embodiment, the light emitting unit 52
The ridge portion 523 of No. 0 is press-fitted and held in the concave portion 506a of the case body 506 via the elastic tape material 524, so that the tape material 524 is formed in the ridge portion 523 and the concave portion 5
Since it fills the gap between the pad member 510 and 06a and also functions as a cushioning material, the vibration caused by the impact of the pad body 510 is absorbed by the tape material 524, and the occurrence of "chattering" such as mechanical noise is suppressed. It In particular, since (thickness t1 of tape material 524)> (gap t2 between protrusion 523 and recess 506a) is set, the gap after press fitting is eliminated, and the effect of preventing "chattering" is high. Moreover, the ridge portion 52
3 and the concave portion 506a have a concave-convex relationship,
Since the tape material 524 is provided on both the inner peripheral surface 523b and the lower surface 523c, a cushioning effect is exerted in both the radial direction and the vertical direction. Therefore, it is possible to make the entire outer periphery of the pad body shine while suppressing chattering due to hitting of the pad body.

Further, the lower surface 523c of the ridge portion 523 of the light guide 521 is formed into a corrugated surface, that is, the lower surface 523c along the longitudinal direction of the light guide 521 is formed into a corrugated cross section. . The incident light from the light source unit 530 travels along the longitudinal direction of the light guide 521, but the lower surface 523
A part of the incident light toward c is reflected by the corrugated slope of the lower surface 523c and travels toward the upper light emitting surface 521c. Therefore, as compared with the case where the lower surface 523c is simply formed as a flat surface,
The amount of light emitted from the light emitting surface 521c to the outside increases. Moreover, the tape material 524 is made of a material having a color such as white that easily reflects light, and the tape material 524 is used to form the protrusion 52.
Since the tape member 524 is covered, the attenuation of the incident light can be reduced by the reflection action of the tape material 524 and the amount of light emitted from the light emitting surface 521c can be increased. Therefore, the light emission intensity can be increased and the visibility of the light guide can be further enhanced.

In the present embodiment, the light emitting unit 5
Although 20 is configured to be directly held by the case body 506, an inclusion serving as a light guide holding portion may be provided as long as it is fixedly held to the case body 506.

The corrugated surface of the lower surface 523c of the light guide 521 can be applied to the keyboard device type electronic musical instrument of the fourth embodiment.

For example, the lower surface 92e (see FIG. 16) of the lower end portion of the white key 92 may be formed in a wavy shape. In the fourth embodiment, since the light of the LED 98 is made to enter the key body from the rear end surface 92f of the white key 92, the lower end portion of the white key 92 is corrugated in the longitudinal direction. Bottom surface 92
e may be formed. As a result, a part of the incident light is reflected by the lower end lower surface 92e and travels upward, so that the amount of light emitted to the outside from the upper portion (key pressing surface or the like) of the white key 92 increases. Therefore, the light emission intensity can be increased and the visibility can be further improved.

Such a corrugated surface may be formed on the opposite side to the visually recognized surface. For example,
For the lower surface 92da of the step portion 92d of the white key 92 or the black key 93, the lower surface 93da of the step portion 93d and the lower end portion lower surface 93e may be similarly formed.

The present invention is not limited to the drum device type or keyboard device type musical instruments illustrated above, and the present invention can be applied to other electronic musical instruments.

[0142]

As described above, according to the first aspect of the present invention.
According to the electronic musical instrument of the present invention, it is possible to illuminate the entire outer periphery of the pad body with a simple configuration while ensuring durability and low cost.

According to the electronic musical instrument of the second aspect of the present invention, the outer periphery of the pad body can be made to illuminate in a substantially annular shape with the minimum light source, and the structure can be simplified.

According to the electronic musical instrument of the third aspect of the present invention, the luminous intensity can be increased and the visibility can be further enhanced.

According to the electronic musical instrument of the fourth aspect of the present invention, the key can be illuminated in a desired manner with a simple structure.

According to the electronic musical instrument of the fifth aspect of the present invention, it is possible to freely set the optimal light emission mode according to the model.

According to the electronic musical instrument of the sixth aspect of the present invention, it is possible to illuminate the entire outer periphery of the pad body while suppressing the chattering caused by the impact of the pad body.

According to the electronic musical instrument of the seventh aspect of the present invention, it is possible to illuminate the entire outer periphery of the pad body with a simple structure while ensuring durability and low cost.

According to the electronic musical instrument of the eighth aspect of the present invention, the luminous intensity can be increased and the visibility of the light guide can be further enhanced.

According to the electronic musical instrument of the ninth aspect of the present invention, it is possible to illuminate the entire outer periphery of the pad body with a simple structure while ensuring durability and low cost.

[Brief description of drawings]

FIG. 1 is an external view of a drum device type electronic musical instrument according to a first embodiment of the present invention.

FIG. 2 is a plan view of a pad body in the same embodiment.

FIG. 3 is an external perspective view of the light emitting unit in the same embodiment as seen obliquely from above.

FIG. 4 is a partial cross-sectional view taken along the line AA of FIG.

5 is a partial cross-sectional view taken along the line BB of FIG.

FIG. 6 is a diagram showing a part of an upper case together with a light source unit.

FIG. 7 is a block diagram showing a configuration of a main part of a control system of the device.

FIG. 8 is a diagram corresponding to a partial cross-sectional view taken along the line AA of FIG. 1 showing a configuration of an electronic musical instrument according to a second embodiment.

FIG. 9 is a partial cross-sectional view (FIG. 9A) showing the configuration of the electronic musical instrument according to the same embodiment and a partial plan view (FIG. 9B) of the fixed contact film.

FIG. 10 is a diagram showing a flowchart of main processing according to the third embodiment.

11 is a diagram showing a flowchart of a pad switch process executed in step S103 of FIG.

12 is a diagram showing a continuation of the flowchart of FIG. 11 of the pad switch process executed in step S103 of FIG.

FIG. 13 is a diagram showing an output circuit of a switch unit.

FIG. 14 is a partial plan view of a keyboard device type electronic musical instrument according to a fourth embodiment.

15 is a cross-sectional view taken along the line EE of FIG.

16 is a sectional view taken along line FF of FIG. 14 (FIG. 16A) and a sectional view taken along line GG of FIG. 14 (FIG. 16B).

FIG. 17 is a diagram showing another configuration example of the light source unit.

FIG. 18 is an exploded perspective view showing the configuration of a drum device type electronic musical instrument according to a fifth embodiment of the invention.

FIG. 19 is an exploded perspective view of a light emitting unit in the electronic musical instrument.

FIG. 20 is a partial cross-sectional view in the vicinity of the fitting portion between the ridge of the light guide and the case body.

[Explanation of symbols]

6, 106, 506 upper case, 10, 310 pad body, 11, 311 pad skin body, 11a, 311
a striking surface (struck surface), 12, 312 pad plate,
14, 314 Bridge body, 20, 120 Light emitting unit, 21, 121 Light guide body, 21a Starting end face,
21b Terminal surface, 21c Light emitting surface, 23, 123
Reflective cover, 30 light source section, 31 LED, 3
2LED cover, 41 sensor part, 91 common base end part, 92 white key, 92a, 92b both side surfaces (irregular reflection surface), 92c slant surface, 92d step part, 92da
Lower surface (diffuse reflection surface), 92e Lower end lower surface, 92f
Rear end surface, 93d step portion, 93da lower surface, 93
e Lower surface of lower end portion, 96 optical fiber, 98 LED,
302 switch part, 510 pad body, 506
Case body, 521 Light guide body, 521c Light emitting surface (front surface), 530 Light source part, 524 Tape material (light reflecting member), 506a Recessed part (light guide holding part, holding part)

Claims (9)

[Claims] 1. A drum device type electronic musical instrument which detects a hit on a hit surface of a pad body and generates a musical tone signal according to a detection output, the linear musical instrument being provided on an outer periphery of the pad body. Light body (21)
And a light source unit provided near one end of the light guide and emitting light toward the one end, and the light emitted from the light source and incident on the one end of the light guide propagates through an optical fiber. The light incident on the one end is formed by guiding the other end of the light guide using the principle and roughening a part of the exposed surface of the light guide to form a light emitting surface (21c). An electronic musical instrument, characterized in that at least a part of the light is emitted from the light emitting surface to the outside. 2. The light guide body is formed in a substantially annular shape with a part of the outer periphery cut out, and the light source section is arranged between the one end portion and the other end portion of the light guide body. The electronic musical instrument according to claim 1, which is characterized in that. 3. A surface having a corrugated cross section along the longitudinal direction of the light guide is formed on at least a part of a portion of the light guide opposite to the light emitting surface. The electronic musical instrument according to claim 1. 4. An electronic musical instrument of a keyboard device type, which detects a key depression operation and generates a musical tone signal according to a detection output, the key having a light guide section, and the light guide section of the key. A light source portion that emits light toward the front surface of the key.
2a, 92da), and guides the light emitted from the light source part and incident on the light guide part of the key to the irregular reflection surface side of the light guide part using the light propagation principle of an optical fiber. An electronic musical instrument characterized in that at least a part of light incident on a light section is diffusely reflected by the irregular reflection surface and visually recognized from the outside. 5. The incident light is diffusely reflected by the diffuse reflection surface and leaks directly to the outside from the diffuse reflection surface, and diffusely reflected by the diffuse reflection surface and transmitted through the inside of the light guide portion of the key, and the light guide portion. The electronic musical instrument according to claim 4, wherein the electronic musical instrument is visually recognized by at least one of leaking to the outside through the upper surface of the. 6. A drum device type electronic musical instrument, which detects a hit on a hit surface of a pad body (510) and generates a musical tone signal according to a detection output, comprising a case body (506) and the pad body. A light guide (521) provided on the outer periphery of the light guide, a light source (530) that emits light toward the light guide, and a light guide holder that holds the light guide fixedly to the case body. An electronic musical instrument, wherein the light guide body is held by the light guide body holding portion via a tape material (524). 7. A drum device type electronic musical instrument for detecting a hit on a hit surface of a pad body and generating a musical tone signal according to a detection output, comprising: a case body and an outer circumference of the pad body. A light guide provided over the light guide, a light source configured to be sufficiently smaller than the light guide and emitting light toward the light guide, the pad body and the light guide with respect to the case body. And a holding unit that holds the light source unit fixedly, and configured such that at least a part of the light emitted from the light source unit is visually recognized by being emitted to the outside from the surface of the light guide through the light guide. An electronic musical instrument characterized by that. 8. A light reflection member provided on a surface other than the surface of the light guide, wherein at least a part of the light emitted from the light source unit passes from the surface of the light guide through the light guide. 8. The electronic musical instrument according to claim 7, wherein when the light is emitted to the outside, the amount of light emitted from the surface of the light guide increases due to the reflection effect of the light reflecting member. 9. A drum device type electronic musical instrument, which detects a hit on a hit surface of a pad body and generates a musical tone signal according to a detection output, the electronic musical instrument being provided on a case body and an outer periphery of the pad body. A light guide, a light source that emits light toward the light guide, and a holder that fixedly holds the pad body and the light guide with respect to the case body. An electronic musical instrument characterized by being provided substantially below a pad body.