JPH0339998A - electronic drum - Google Patents

Abstract

PURPOSE:To securely and excellently transmit the stroke force of a stick, etc., to a diaphragm by arranging a damper in a musical instrument case, and bringing the diaphragm and a drum head into contact by this damper and laminating them. CONSTITUTION:The meter 4 constituted by providing and forming integrally an elastic cylindrical support part 4a and a bellows-shaped cushion part 4b is arranged in the musical instrument case consisting of an upper case 2 and a lower case 3, and this damper 4 brings the diaphragm 5 and drum head 7 into elastic contact with each other to laminate them. Consequently, the stroke force of the stick, etc., can securely and excellently be transmitted to the diaphragm, vibration corresponding to the stroke force can accurately be detected, and a drum sound can be radiated excellently.

Description

[Detailed description of the invention] [Technical field of invention J This invention relates to an electronic drum.

[Prior Art and Its Problems J] In recent years, electronic drums have been developed as drum instruments. This electronic drum is designed so that when the drum head is hit with a stick or the like, the vibration is detected as an electric signal by a sensor, and a drum sound (electronic sound) is generated based on the detected electric signal.

However, in such electronic drums, if the diaphragm, cushioning member, and drum head are not laminated well by closely fitting them inside the instrument case, when the drum head is hit with a stick, etc., it will not respond to the impact force of the stick, etc. There was a problem in that the diaphragm did not vibrate and vibrations corresponding to the impact force could not be accurately detected.

Therefore, recently, electronic drums that can accurately detect impact vibrations have been developed (for example,
(as described in Publication No. 9499).

However, in the case of this electronic drum, there is a problem in that even when minute external vibrations other than impact are applied, the vibrations are detected.

[Object of the Invention] This invention has been made in view of the above-mentioned circumstances, and its purpose is to be able to reliably and well transmit the impact force of a stick, etc. to the diaphragm, and to transmit the impact force of a stick or the like to the diaphragm in accordance with the impact force. An object of the present invention is to provide an electronic drum that can accurately detect vibrations and emit drum sounds well.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention is such that a damper is disposed within a musical instrument case, and the diaphragm and drum head are elastically brought into close contact with the damper and laminated.

[First Embodiment] An embodiment in which the present invention is applied to a snare drum will be described below with reference to FIGS. 1 to 4.

This snare drum l has a rubber damper, 4° diaphragm, 5. al
Equipped with rad 7 to strike line member 6 drum.

By hitting the drum head 7 with a stick (not shown) or the like, a sensor 8 provided on the diaphragm 5 detects vibrations corresponding to the hitting force as an electric signal, and based on the detected electric signal, the drum head It is designed to generate sound. Each of the above-mentioned members will be explained in order below.

The lower case 3 is a bowl-shaped container made of synthetic resin with an arcuate bottom and a cylindrical outer peripheral wall 3b, and inside thereof there are a damper mounting portion 3C, a cylindrical storage portion 3d, a fixed column 3e, and a cylindrical storage portion 3d.
... and the mounting pillars 3f, ◆, etc. are each formed integrally. The damper mounting part 3c holds the rubber damper 4 in the lower case 3, and has a cylindrical shape with a low height, and has radial ribs 3cl formed inside thereof, and is provided at the center of the lower case 3. It is being

The cylindrical storage part 3d stores the diaphragm 5 and the buffer member 6, and is provided between the outer peripheral wall 3b of the lower case 3 and the damper mounting part 3c, and its height is higher than the outer peripheral wall 3b. The metal fitting insertion hole 3d+ is also formed at a predetermined location. Fixed pillar 3e
is for fixing the upper case 2, and has a cylindrical shape, into which a metal column piece 9 having a female thread is fitted;
Four pieces are provided at equal intervals near the inner side of the outer peripheral wall 3b.

The mounting post 3f is for fixing a presser metal fitting IO, which will be described later, and has a cylindrical shape similar to the above-mentioned fixing post 3e, and a metal post piece 9 is fitted into the inside of the mounting post 3f, so that the metal fitting of the storage portion 3d described above can be inserted. Two sets are provided on each side of the hole 3d+ corresponding to the hole 3d+.

The rubber damper 4 elastically supports the diaphragm 5 and the buffer member 6, and has a cylindrical support part 4a and a bellows-shaped cushion part 4b as shown in FIGS. 3(a) and 3(b). A cylindrical support part 4a, which is integrally formed of elastic urethane rubber, supports the diaphragm 5 and the III shock member 6, and supports the seat a within the elastic limit.
(It deforms rapidly when a load above a certain level is applied.)
Its lower end is attached to and held on the outer periphery of the damper support portion 3c of the lower case 3. The bellows-shaped cushion portion 4b elastically presses the diaphragm 5 and the buffer member 6 from below against the drum 7, and unnecessary vibrations from the upper case 2 and the like are transmitted to the diaphragm 5.
It acts to prevent the information from being transmitted. This cushion portion 4b is provided on a cylindrical support portion 4a. As shown in FIG. 4, the rubber damper 4 which is 41idL in this way initially has a stroke that gradually increases in proportion to the load up to point P due to the bellows-shaped cushion part 4b, but the cushion part 4b When the drum head 7 is stretched with 81 layers of the diaphragm 5 and the buffer member 6, the load up to the Q point is always on the side, and when hitting with a stick etc., it has cushioning properties between the Q point and the P point. There is. Therefore, even if unnecessary vibration is applied to the upper case 2, etc., the bellows-shaped cushion portion 4b itself gently moves up and down with a large stroke, absorbing the vibration.
Unnecessary vibrations from etc. are not transmitted to the diaphragm 5, and therefore, the sensor 8 attached to the diaphragm 5 can be reliably prevented from picking up unnecessary vibrations. By the way, the drum head 7 is lightly hit by a drum stick, and the drum head 7 is struck by a predetermined amount (
When a load (approximately 3 kg) at point P) is applied, the cooker 1 flap portion 4b will not be compressed any further, while the support portion 4a has a predetermined steel column, so the overall stroke of the rubber bumper <-4 will not be large. ．． Therefore, vibrations caused by the impact of the drumstick can be reliably transmitted to the diaphragm 5. However, if the drum head 7 is strongly hit by a drum stick and the load on the diaphragm 5 and the buffer member 6 exceeds a predetermined limit (8 kg or more in FIG. 4), the support portion 4a will buckle (not shown). However, the stroke suddenly becomes larger.

The diaphragm 5 vibrates in response to the striking force of a stick (not shown), and is made of a highly resonant material such as cork, veneer, or wood. It is located within the section. In this case, a sensor 8 is provided at the center of the lower surface of the diaphragm 5. This sensor 8 detects the vibration of the diaphragm 5 as an electric signal, and is made of a piezoelectric element such as a piezo element, and is attached to the bottom surface of the diaphragm 5 with screws 8C through a sensor pad 8a. The detection signal is guided to the outside of the lower case 3 by a lead wire 8b, and is applied to a speaker (not shown) via a predetermined electric circuit, so that a drum sound is emitted from the speaker. Note that the sensor pad 8a uniformly picks up the vibrations of the diaphragm 5,
It consists of a cushioning material such as rubber or sponge.

The buffer member 6 moderately buffers the impact force of a stick or the like, and is composed of an upper buffer rubber 6a and a lower buffer rubber 6b. The upper cushioning rubber 6a is made of urethane rubber or the like and is designed to improve the feel when hit with a stick or the like. The lower cushioning rubber 6b is made of a relatively hard sponge, and is designed to appropriately absorb impact force from a stick or the like and transmit it to the diaphragm 5 well. Such a buffer member 6 is arranged in the housing portion 3b of the lower case 3, with a lower buffer rubber 6b and an upper buffer rubber 6a stacked on the diaphragm 5.

The drum head 7 is a decorative sheet that protects the upper cushioning rubber 6a, and is made of polyester film, etc., and a metal frame 7a made of aluminum or the like is attached around it. It is pushed down and stretched over the storage section 3b of the lower case 3.

In this case, when the drum head 7 is stretched, the cushioning member 6 and the diaphragm 5 stacked on the underside of the drum head 7 are
-4 bellows-shaped cushion portions 4b, the cushion portions 4b are stacked in a stacked manner in the storage portion 3b of the lower case 3 in a resiliently close manner.

The upper case 2 is attached on top of the lower case 3 to constitute a musical instrument case, and also extends over the drum head 7, and is made of synthetic resin.

It is shaped like a ring, and there is a drum head 7 on the inside lower surface.
A contact portion 2a is provided that contacts and pushes down the metal frame 7a. Further, bolt guide portions 2C11... having bolt insertion holes 2b... are provided at predetermined locations of the upper case 2. Therefore, when the bolts 11 are inserted into the bolt insertion holes 2b through the washers 11a, the bolt guide action of the bolt guide portions 2C causes the fixing columns 3e of the lower case 3 to・Can be inserted securely and quickly into the body. Therefore, Pol) 1
1... to the fixing columns 3e..., the upper case 2 is fixed to the lower case 3. In this case, the bolt insertion hole 2b of the upper case 2...
through the fixing column 3e of the lower case 3, and screw it into the female thread of the metal column piece 9 fitted inside the fixing column 3e of the lower case 3, and its tightening is done by applying force rI.
By adjusting J, the tension of the drum head 7 is adjusted. Further, the outer circumference of the upper case 2 is attached to the lower case 3 with a predetermined gap so that the outer circumference of the upper case 2 does not come into contact with the outer circumference of the lower case 3.

In addition, the lower case 3 is equipped with a presser metal fitting l as shown in Fig. 1.
O is attached. This retainer lO is for fixing the entire musical instrument in a predetermined place, and is inserted into the metal fitting insertion hole 3d of the lower case 3, and is attached to the mounting post 3 near the metal fitting hole 3d.
A clamping part that is attached by screwing a screw 12 into the female thread of the metal column piece 9 in f..., the tip of which protrudes to the outside of the lower case 3, and which clamps the column etc. on this protruding part. 10a is provided.

However, according to the snare drum l configured as described above, the rubber damper 4 is held in the damper mounting portion 3C in the lower case 3, and the diaphragm 5 and the buffer member 6 are mounted on the rubber damper 4.
are stacked and placed in the storage part 3b of the lower case 3, and the rad 7 is placed on top of the drum, and the upper case 2 is stacked.
It can be assembled easily and well by simply attaching it to the lower case 3 with the port 11..., so the assembly workability is good.Especially, the rubber damper 4 is cylindrical and supports i'
Since it consists of fl14a and a snakeskin-like cushion part 4b, the diaphragm 5 and the buffer member 6 can be laminated thereon so as to be elastically brought into close contact with the cushion part 4b. Further, in this embodiment, a structure is adopted in which the buffer member 6 and the diaphragm 5 are elastically supported by the snake-like cushion portion 4b that can be moved up and down gently with a relatively large stroke. Even if unnecessary vibrations are applied to the upper case 2, etc., the vibrations can be reliably prevented by the cushioning action of the cushion portion 4b. Further, when the cushion portion 4b has the diaphragm 5 and the buffer member 6 closely arranged, its cushioning properties (elasticity) decrease, but the diaphragm 5 and the buffer member 6 are well supported by the cylindrical support portion 4a. , the impact force from a stick or the like can be reliably and favorably transmitted to the diaphragm 5 via the buffer member 6. Therefore, the vibration of the diaphragm 5 can be accurately detected by the sensor 8 provided on the diaphragm 5. Moreover, the support portion 4a of the rubber damper 4 is within its elastic limit.

If a load above a certain level is applied, buckling occurs, so that no more load than necessary is applied to the diaphragm 5 and the buffer member 6, and they can be held well.

In addition, when attaching the upper case 2 to the lower case 3, the tension of the RAD 7 to the drum is adjusted by simply adjusting the force of tightening the port 11. Can be easily and easily adjusted.

[Second Embodiment] Next, a case where the present invention is applied to a bass drum will be described with reference to FIGS. 5 to 7. In this case, the same parts as those in the first embodiment described above are given the same reference numerals, and the explanation thereof will be omitted.

This bass drum 20 has a front panel 22 attached to the upper part of a rear case 21 with a molding 23, a damper chassis 24 attached to this front panel 22, and inside this damper chassis 24 the above-mentioned rubber damper 4 and diaphragm 5.
The cushioning member 6 is housed and fixed with a decorative ring 25, and as shown in FIG.
The shock absorbing member 6 provided at the center thereof is hit by a club which is held on the pedal receiver 6 by a pedal receiver 27 and holding fittings 28, 28 and which is attached to a foot pedal (not shown).

That is, the rear case 21 is a relatively large bowl-shaped container,
A front panel 22 is attached to the upper part of the inner side. This front panel 22 is a disc made of synthetic oil-repellent, and a mounting hole 22a is provided in the center of the panel so as to extend upwardly and downwardly.The front panel 22 is fitted into the inner upper part of the rear case 21 and fixed by a molding 23. . This molding 23 is made of vinyl chloride or the like, and is attached to the upper outer periphery of the rear case 21, and presses down the outer periphery of the front panel 22 via the rear case 21, as well as its upper periphery.

The damper chassis 24 houses the rubber damper 4, the diaphragm 5, and the buffer member 6 inside, and is made of metal or the like and has a cylindrical shape, and has a flange portion 24 on the outer periphery of the upper part.
A is provided, and a damper mounting portion 24b is provided at the bottom, which is disposed within the mounting hole 22a of the front panel 22, and the seven rung portions 24a, together with a decorative ring 25 to be described later, are attached to screws 29... It can be installed with. In this case, the rubber damper 4 is made up of a cylindrical support part 4a and a snakeskin-like cushion part 4b as described above, and the support part 4a is attached to the damper mounting part 24b of the damper chassis 24, and the upper cushion The diaphragm 5 and the buffer member 6 are arranged in a layer a on the portion 4b. The diaphragm 5 vibrates in response to the impact force of a drumstick (not shown), and has a pressure point in the center of its lower surface. A sensor 8 consisting of elements 1 and the like is provided, and this sensor 8 detects the vibration of the diaphragm 5 as an electrical signal. Similarly to the embodiment described above, the first impact member 6 also moderately buffers the impact force of the drumstick and transmits it to the diaphragm 5, and is composed of an upper cushioning rubber 6a and a lower cushioning rubber 6b. are laminated on.

The decorative ring 25 fixes the rubber damper 4, the diaphragm 5, and the buffer member 6 inside the damper chassis 24, and is made of Irr, S+ resin, etc., and has a flange 25 on its outer periphery.
A is provided with a suppressing portion 25b on the lower surface, and is attached to the front panel 22 with screws 29 through the collar portion 25a and the flange portion 24a of the damper chassis 24, and the pressing portion 25b on the lower surface is attached to the top. The periphery of the upper part of the buffer member 6 is pressed down, and the diaphragm 5 and the buffer member 6 are elastically brought into close contact with each other by the rubber damper 4.

In addition, as shown in FIG. 7, on both sides of the rear case 21,
A holding fitting 28° 28 similar to that of the above-described embodiment is provided, and a pedal receiver 27 is provided on the lower side. Holding rods 28a, 28a, which are round rods bent in the shape of an "E", are held between the holding fittings 28.28, and the ends of the holding rods 28a, 28a are inserted into the rubber mat 26 to hold the entire instrument. is held so that it does not fall. The pedal receiver 27 covers the entire instrument with a rubber mat 26.
A foot pedal (not shown) is attached thereto.

However, according to the bass drum 20 configured as described above, it is possible to reliably and well detect vibrations corresponding to the striking force caused by drumsticks, etc., as in the above-described embodiments, and the front panel 22 is Damper chassis 2 in the center
Install rubber damper 4.4 into this damper chassis 24! Since the moving plate 5 and the buffer member 6 are housed and pressed down with the decorative ring 25, the rubber damper 4, the diaphragm 5, and the buffer member 6 are housed inside a relatively large instrument body.
can be installed compactly. Moreover.

When assembling the rubber damper 4. All that is required is to store the diaphragm 5 and the buffer member 6, attach the damper chassis 24 to the front panel 22 provided on the rear case 21, and attach the decorative ring 25 to the front panel 22 with screws 29. The assembly workability is extremely good. In this case, since the drumsticks are equipped with felt etc. at the tip of the handle, there is no need to provide the film-like drum head 7 as in the above-mentioned embodiment, and the shock absorbing member 6 will not be damaged. Never.

[Third Embodiment] Next, a third embodiment of the present invention will be described with reference to FIG. In this case as well, the same parts as in the above-mentioned il embodiment are given the same reference numerals, and their explanation will be omitted.

In this third embodiment, an air damper 30 is disposed within the lower case 3 of the snare drum 1, and the air damper 30 allows the diaphragm 5 and the buffer member 6 to be elastically brought into close contact with each other and laminated.

That is, like the cushion damper 6 of the first embodiment, the F-damper 30 consists of a cylindrical support part 30a and a snake-like cushion part 30b, and the support a! 130a has a small hole 30a+ for air through which air circulates inside and outside.
, 3CJa+ are provided, and when the support part 30a of this air damper 30 is attached to the damper support part 3c of the lower case 3, an adhesive 31 such as grease is applied between them to maintain this close contact. It is held in close contact with the damper support portion 3C via the agent 31. Also, when arranging the diaphragm 5 on the upper cushion part 30b,
An adhesive 31 such as grease is applied to the upper end surface of the diaphragm 5, and the diaphragm 5 is placed in close contact with the diaphragm 5 via the adhesive 31. Thereby, the inside of the air damper 30 is hermetically sealed.

However, with the snare drum configured in this way, the air damper 30 can hold the diaphragm 5 and the buffer member 6 even better than in the first embodiment described above.

You can get the same feel of hitting a stick as you would with a natural instrument. In this case, especially the support part 3 of the air dunnage <-30
Since air holes 30a+ and 30a+ are provided in 0a, the air inside the air damper 30 flows to some extent inside and outside through the small holes 30a1 and 30a+ depending on the impact force, resulting in an even better impact feel. .

In addition, in the third embodiment described above, the air damper 30+7
) Although the small holes 30a+ and 30a+ are provided in the support portion 30a, the present invention is not limited to this, and the support portion 30a may be provided with an exhaust valve and an intake valve to adjust the internal air pressure according to the striking force. ! You may also do this.

Further, in the third embodiment described above, the inside of the air damper 30 is sealed using an adhesive 31 such as grease.
The present invention is not limited to this; for example, an air damper 40 as shown in FIG. A cushion part 40b is formed in the upper part, and a support part 40a is connected to the lower case 3.
The vibration plate 5 and the shock absorbing member 6 arranged thereon are elastically held by the damper mounting portion 3C of the damper mounting portion 40b. Such an air damper 40 also has the same effects as the third embodiment described above.

[Modifications] In each of the above embodiments, a case has been described in which the rubber damper is integrally formed with a cylindrical support part and a bellows-shaped cushion part, but the present invention is not limited to this. It is also possible to have a separate structure.

[Effects of the Invention] As described in detail above, according to the electronic drum of the present invention, a damper is arranged inside the musical instrument case, and the diaphragm and drum head are elastically brought into close contact with the damper and stacked. Therefore, the impact force of the stick etc. can be reliably and well transmitted to the diaphragm, and the vibration corresponding to the impact force can be accurately detected, which has the advantage of being able to generate a good drum sound. There is.

[Brief explanation of drawings]

1 to 4 show a first embodiment in which this IJI is applied to a snare drum. )(b) is a diagram showing a rubber damper, FIG. 4 is a diagram showing characteristics of the rubber damper, FIGS. 5 to 7 show a second embodiment in which the present invention is applied to a bass drum, and FIG. The figure is a side view with the main parts cut away, FIG. 6 is an exploded perspective view, FIG. 7 is an external front view, FIG. 8 is a sectional view of the third embodiment, and FIG. 9 is a modified example of the air damper. FIG. 1...Snare drum, 2...Upper case, 3...Lower fill case, 4...
Rubber damper, 5... Vibration plate, 6...
Buffer member, 8...Sensor, 20...
Bass drum, 21... Rear case, 22...
...Front handle, 30.40... Air Dunno - Figure 3 7... / John Dan I Mart L Sai Takumi 6 High XF A
')'i#MI! l)

Claims (1)

[Claims] A musical instrument case with one end open and the other end closed; a diaphragm attached to the open side of the musical instrument case so as to close the opening; a drum head member fixed to the case; a vibration detection means provided on the lower surface of the diaphragm for detecting mechanical vibrations generated in the diaphragm and outputting an electric signal for instructing the start of generation of a corresponding acoustic signal; A cylindrical damper is disposed between the lower surface of the diaphragm and the inner surface of the musical instrument case, and the damper is integrally formed with an elastic cylindrical support and at least one end of the support. An electronic drum comprising a bellows-shaped cushion part.