JPH0844357A - Electronic percussion instrument - Google Patents

Abstract

PURPOSE:To reduce a weight, to decrease the number of parts and to simplify assembling stages by integrally forming a planar percussion surface part consisting of a soft high-polymer material and a case and sticking a sensor for detecting the percussion of the percussion surface part to this case. CONSTITUTION:The planar percussion surface part 1 consisting of the soft high-polymer material, such as elastomer, and the case 5 which is in contact with the percussion surface part 1 at its surface consists of the hard high-polymer material, such as ABS resin, formed with the part in contact with the central part of the percussion surface part l to a planar form. The case 5 to be formed commonly as a vibration section is first molded of the hard high-polymer material, then the soft high-polymer material is poured therein, by which the boundaries of both resins are fused and integrated for the purpose described above. The sensor 3 which detects the percussion of the percussion surface part 1 is stuck by a double coated tape 4 on the rear surface of the planar part in contact with the central part of the percussion surface part 1 of the case 5. The percussion surface part 1 has preferably the plate thicknesses which are larger in the central part than the peripheral part thereof and increase successively continuously or stepwise from the peripheral edge toward the center of the percussion surface part 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic percussion instrument having a sensor for detecting a hit applied to a hit surface.

[0002]

2. Description of the Related Art Conventionally, an electronic percussion instrument has been used which detects a hit applied to a hitting surface with a stick or the like by a sensor and produces a percussion sound synthesized at a timing synchronized with the hit. FIG. 8 is a sectional view showing an example of a conventional electronic percussion instrument. A vibration plate 2 made of an iron plate is insert-molded on the back surface of the rubber striking face portion 1, a shock sensor 3 is attached to the back surface of the vibration plate 2 with a double-sided tape 4, etc., and these members are attached to the case 5. It is composed by. A part of the case 5 constitutes a holder 12, which holds the shaft 13 to hold the electronic percussion instrument body at a desired spatial position.

[0003]

In the electronic percussion instrument having such a structure, it usually takes 8 to 10 minutes for molding the rubber forming the striking face portion 1, and the striking face portion 1, the diaphragm 2 and the sensor 3 are used. It took a long time to assemble the case 5 into the case 5, was not suitable for mass production, and had a limit in cost reduction.

An object of the present invention is to solve such problems and to shorten the molding time, reduce the weight, reduce the number of parts, and simplify the assembly process.

[0005]

The first electronic percussion instrument of the present invention for solving the above-mentioned problems includes (1_1) a plate-shaped striking surface portion made of a soft polymer material (1_2) a surface made of a hard polymer material Is formed integrally with the striking face, in which at least the part that is in contact with the striking face is in the shape of a plate. (1_3) Of the plate-like portion that touches the center of the striking face It is characterized in that it is provided with a sensor attached to the back surface for detecting the impact of the striking portion.

Here, in the first electronic percussion instrument of the present invention, it is preferable that the striking face portion has a thicker portion in a central portion of the striking face portion than in a peripheral portion of the striking face portion. . Further, in the first electronic percussion instrument of the present invention, the striking face portion may have a thick plate thickness continuously or stepwise from the periphery of the striking face portion toward the center.

Further, the second electronic percussion instrument of the present invention for solving the above-mentioned problems is (2_1) a plate-shaped striking surface portion made of a soft polymer material (2_2) a surface made of a hard polymeric material is in contact with the striking surface portion. And a case integrally formed with the striking face, in which a protrusion standing on the back surface is formed (2_3) a bottom plate fixed to the protrusion (2_4) an inner side of the bottom plate surrounded by the bottom plate and the case It is characterized in that it is provided with a sensor that is attached to the surface and detects a hit on the hitting portion.

[0008]

In the past, the main part was composed of four members, the striking face portion, the vibrating plate, the sensor, and the case. However, in the present invention, the case and the vibrating plate are integrated from the beginning, and the striking face portion is the case. Since it is integrally molded with, the number of parts is small, and the step of attaching the striking surface portion to the case, which was necessary in the past, is unnecessary.

Further, in the prior art, the striking surface portion was made of rubber, which required 10 minutes or more for molding. However, in the present invention, a soft polymer material is used. Therefore, for example, an elastomer is adopted according to the selection of the material. In this case, it takes about 10 seconds, and the effect of shortening the molding time by changing the material is great. For these reasons, the productivity is significantly improved as compared with the conventional one, and the performance variation is less than that of the rubber attachment by integrally forming the striking face portion and the case.

Further, in the conventional structure, the sensitivity of the sensor when hitting the center of the striking surface is inevitably higher than when hitting the peripheral, and the sensitivity of the center and the peripheral is made uniform. Was desired. In the present invention, since it is possible to freely design the wall thickness of the striking face portion by adopting the integral molding method, the impact force at the central portion can be attenuated by making the thickness of the sensor corresponding portion thicker than other portions. It is possible to increase the sensitivity and reduce the sensitivity of the central portion to reduce the difference in sensitivity from when the peripheral portion is hit.

Further, by increasing the thickness of the striking surface portion continuously or stepwise from the peripheral edge toward the center, the sensitivity of the sensor can be made uniform in the same manner. Furthermore, instead of directly attaching the sensor to the back surface of the vibrating portion of the case that is in close contact with the back surface of the striking portion, the sensor may be attached to the bottom plate that is attached via the protrusion that is provided upright on the case. The sensitivity can be made uniform.

[0012]

Embodiments of the present invention will be described below. 1 and 2 are a bottom view (FIG. 1) showing an electronic percussion instrument according to a first embodiment of the present invention and a cross-sectional view (FIG. 2) viewed in the XX direction shown in FIG. In these figures and each figure showing other embodiments described later, the same numbers as those given in FIG. 8 are given to the elements corresponding to the respective elements of the conventional example (see FIG. 8) described above. However, the description is omitted.

The embodiment shown in FIGS. 1 and 2 differs from the conventional example shown in FIG. 8 in that the diaphragm 2 and the case 5 are separate members in FIG. The case and the case are integrated, and in FIG. 8, the striking face portion 1 and the diaphragm 2 are integrated by insert molding, whereas in FIG.
Then, the vibrating portion that also functions as the case previously molded is integrally molded with the striking face portion and is fused, and in FIG. 8, the striking face portion 1 is rubber and the diaphragm 2 is an iron plate. hand,
In FIG. 1, the striking face portion 1 is a soft polymer material, and the vibrating portion is a hard polymer material.

In the present invention, the soft polymer material refers to so-called soft resin such as elastomer, soft rubber, sponge and impact absorbing gel, and the hard polymer material means ABS resin, AS resin, polypropylene (PP), polyethylene. , Polycarbonate, hard rubber and so-called hard resin. When soft rubber or hard rubber is used, it can be used only in a combination of soft rubber for the striking face and hard rubber for the case.

As described above, since the present invention and the conventional example have different structures and materials, the steps are naturally different. FIG. 8 is an example of so-called insert molding, and when molding a rubber hitting surface, it is necessary to manually position a diaphragm made of an iron plate at a predetermined position in the mold before molding, so that considerable work is required. I need time.

On the other hand, in FIG. 1, first, a case that also serves as a vibrating portion is molded from a hard polymer material such as ABS resin or PP resin, and then a soft polymer material such as elastomer is poured into the case so that the interface between the two resins is made. Fused together to become one. The case 5 shown in FIG. 1 has a reinforcing rib 6, and the case 5 has a boss 10 at the lower peripheral portion (see FIG. 2). An insert nut (not shown) is embedded in the boss 10 and the screw 11 The case 5 and the holder 12 are connected by. The holder has a knob 14, a pipe 15 and a stopper 16, which cooperate to fix the electronic percussion instrument at a desired position on the shaft 13.

FIG. 3 is a sectional view showing an electronic percussion instrument according to a second embodiment of the present invention. FIG. 3 shows the striking face 1
An example in which the thickness of the central portion 1a corresponding to the sensor 3 is made thicker than that of the peripheral portion 1b is shown. Since the impact applied to the thick central portion 19 has a greater attenuation than that of the thin peripheral portion 1b, The sensitivity of the sensor to the striking position is made uniform. In the embodiment of FIG. 3, the bottom plate 7 is fixed to the tip of the reinforcing rib 6 by the boss 8 and the screw 9.

FIG. 4 is a sectional view showing an electronic percussion instrument according to the third embodiment of the present invention. FIG. 4 shows an example in which the thickness of the striking face portion 1 is made thicker in the central portion 1a and gradually becomes thinner toward the peripheral portion 1b, and as in FIG. 3, it has an effect of making the sensitivity of the sensor uniform. FIG. 5 is a sectional view showing an electronic percussion instrument according to a fourth embodiment of the present invention.

FIG. 5 shows a striking face portion 1 made of a soft polymer material.
And a bottom plate 7 mounted via ribs 6 extending downward from the periphery of the case 5, and a sensor 5 on the bottom plate 7. Is an example of an electronic percussion instrument having a double-sided tape 4 attached thereto. In FIG. 5, instead of directly attaching the sensor 3 to the bottom surface of the vibrating portion of the case 5 fused to the back surface of the striking face portion 1, the sensor is attached to the central portion of the bottom plate 7 by a fixing means such as double-sided tape. By doing so, the impact applied to the striking surface reaches the sensor 3 through the rib 6 extending downward from the case, so that even if the striking center portion 1a is hit, the sensitivity is not too strong. Even if you hit, you can get almost uniform output.

6 and 7 are a plan view (FIG. 6) showing a holder portion of an electronic percussion instrument according to the first to fourth embodiments of the present invention and a sectional view (FIG. 7) of the holder portion. is there. The holder has a knob 14, a pipe 15 and a stopper 16
By screwing the knob 14, the holder portion can be fixed to the shaft 13 by the U-shaped upper and lower opening portions 17 and the pipe 15. Since the holder portion is provided with the pipe 15, a force is evenly applied to a wide portion of the shaft 13, the holder portion is stably fixed to the shaft 13, and the head of the screw of the knob 14 fixes the shaft 13 to the shaft 13. It prevents scratching. The stopper 16 prevents the pipe 15 from falling off when the shaft 13 is not inserted.

[0021]

As described above, since the electronic percussion instrument of the present invention is formed by integrally molding the striking surface portion made of the soft polymer material and the case made of the hard polymer material,
Compared with conventional products, it is possible to reduce the weight of products, reduce the number of parts, simplify the assembly process, and shorten the molding time.

In the electronic percussion instrument of the present invention, when the sensor-corresponding portion of the striking surface portion is thicker than other portions, or when the thickness of the central portion of the striking surface portion is thicker and gradually becomes thinner toward the peripheral portion. Even if you hit any position on the striking surface, uniform sensitivity can be obtained. Also, by sticking the sensor on the bottom plate attached from the striking surface through the ribs of the case, the striking force is indirectly transmitted, so that the sensitivity is averaged and the same effect as the above is obtained. .

[Brief description of drawings]

FIG. 1 is a bottom view showing an electronic percussion instrument according to a first embodiment of the present invention.

FIG. 2 shows an arrow XX of FIG. 1 of the first embodiment of the present invention.
FIG.

FIG. 3 is a sectional view showing an electronic percussion instrument according to a second embodiment of the invention.

FIG. 4 is a sectional view showing an electronic percussion instrument according to a third embodiment of the invention.

FIG. 5 is a sectional view showing an electronic percussion instrument according to a fourth embodiment of the invention.

FIG. 6 is a plan view showing a holder of an electronic percussion instrument according to first to fourth embodiments of the present invention.

FIG. 7 is a cross-sectional view showing a holder of an electronic percussion instrument according to first to fourth examples of the present invention.

FIG. 8 is a sectional view showing an example of a conventional electronic percussion instrument.

[Explanation of symbols]

 1 striking surface part 1a central part 1b peripheral part 2 diaphragm 3 sensor 4 double-sided tape 5 case 6 rib 7 bottom plate 8 boss 9 screw 10 boss 11 screw 12 holder 13 shaft 14 knob 15 pipe 16 stopper

Claims (4)

[Claims] 1. A plate-shaped striking surface portion made of a soft polymer material, and a surface made of a hard polymeric material, the surface being in contact with the striking surface portion, and at least a portion being in contact with the central portion of the striking surface portion is formed in a plate shape. Further, a case integrally formed with the striking face portion, and a sensor attached to the back surface of a plate-shaped portion of the case in contact with the center of the striking face portion, the sensor for detecting the striking of the striking face portion, A characteristic electronic percussion instrument. 2. The electronic percussion instrument according to claim 1, wherein the striking face portion has a thicker portion at a central portion of the striking face portion than a peripheral portion of the striking face portion. 3. The electronic percussion instrument according to claim 1, wherein the striking face portion has a thick plate thickness continuously or stepwise from the periphery of the striking face portion toward the center. 4. A plate-shaped striking face portion made of a soft polymer material, and a striking face portion made of a hard polymer material, the front surface of which is in contact with the striking face portion and the protrusion which is erected on the back surface are integrally formed. A molded case, a bottom plate fixed to the protrusion, and a sensor attached to an inner surface of the bottom plate surrounded by the bottom plate and the case, the sensor detecting a striking of the striking face portion. An electronic percussion instrument characterized by that.