JP2007025445A - Electronic keyboard musical instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic keyboard musical instrument equipped with a leg part in which a power source can be housed. <P>SOLUTION: At least one of a plurality of leg parts supporting a primary musical instrument body part at a prescribed height is formed in a shape having mutually opposite surfaces. When the one leg part is formed in the shape having the mutually opposite surfaces, a space part having a prescribed width is formed between the two opposite surfaces, so the power source which supplies electric power to the primary musical instrument body part is stored in the space part. Thus, the electronic keyboard musical instrument has a keyboard having pluralities of white keys and black keys and the power source which supplies the electric power needed to electrically output prescribed signals by keys according to key pressing operations of the respective keys to the primary musical instrument body part is built in the leg part distant from the primary musical instrument body part. Consequently, it is made possible not only to easily replace the power source, but also to prevent other components arranged in the primary musical instrument body part from adversely being influenced to malfunction or get out order, and a layout etc., of respective components in the primary musical instrument body part can suitably be designed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic keyboard instrument such as an electronic piano, an electronic organ, or an electronic keyboard, and more particularly to a leg portion that supports a musical instrument main body.

Recently, instead of natural instruments such as acoustic pianos and organs, etc., it has a keyboard-type performance controller that includes multiple white keys and black keys similar to natural instruments, and detects key-pressing actions for these keys. Accordingly, electronic keyboard instruments such as electronic pianos, electronic organs, and electronic keyboards that generate predetermined performance signals and generate musical sounds electrically have become widespread. Conventionally, in such an electronic keyboard musical instrument, a musical instrument main body including a large number of components such as a keyboard, a power source, a sound source circuit, an amplifier, and a speaker is supported by a plurality of legs. An electronic keyboard instrument is assembled by fixing a plurality of legs to a plurality of locations such as an instrument body or an exterior member surrounding the instrument body using a plurality of bolts or the like. Related to this is, for example, an electronic keyboard instrument described in Patent Document 1 shown below. In the electronic keyboard instrument described in Patent Document 1, the instrument body having a keyboard is fixed substantially horizontally by bolting at two left and right positions with respect to a pair of legs (legs) connected by a stay member. By doing so, the instrument body is supported at a predetermined height.
JP-A-5-297865

  As described above, in the conventional electronic keyboard musical instrument, all the components, that is, the keyboard and the power supply, as well as the tone generator circuit, amplifier, speaker, and the like necessary for the tone generation control are indirectly or directly supported by the legs. The musical instrument main body is housed in the musical instrument main body, and the musical instrument main body is supported by the legs. However, the power supply requires a large space for the arrangement within the instrument main body, and the power supply generates heat during its operation, which adversely affects other components arranged in the instrument main body. May cause malfunction or failure. Therefore, the position of the power supply is limited within the instrument body due to the balance with other parts, and it must be placed as far away as possible from other parts. There were problems such as the addition of new parts, there was not much design freedom in the instrument body, and the instrument body was thinner and more compact and difficult to make stylish. . In addition, when the electronic keyboard instrument can be used at a destination such as overseas, or when the power supply fails, a power supply with a specification that matches the voltage and current of each destination or a normal power supply. However, since the power supply was stored in the instrument body, such replacement was very troublesome.

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide an electronic keyboard instrument that includes a leg part that supports a musical instrument main body part that can accommodate a power source therein.

  An electronic keyboard instrument according to the present invention includes a keyboard including a plurality of white keys and black keys, and electrically outputs a predetermined signal for each key in response to a key pressing operation on each key. A main body, a plurality of legs that support the instrument main body at a predetermined height, and a power source that supplies power to the instrument main body, and at least one leg of the plurality of legs. The portion is formed in a shape having surfaces facing each other, and the power source is housed in a hollow portion having a predetermined width secured between the two facing surfaces.

  According to this invention, it is set as the structure which forms in the shape which has a mutually opposing surface about at least 1 leg part among several leg parts which support a musical instrument main-body part to predetermined | prescribed height. When the leg portion is formed in a shape having opposing surfaces, a cavity portion having a predetermined width is formed between the two opposing surfaces, and electric power is supplied to the instrument body portion in the formed cavity portion. A power supply can be stored. In other words, the instrument body has a keyboard including a plurality of white keys and black keys, and the power required to electrically output a predetermined signal for each key in response to a key pressing operation on each key. The power to be supplied to the unit is built in the leg part located away from the instrument body part. This not only facilitates the replacement of the power supply, but also can prevent other components arranged in the instrument main body from being adversely affected and malfunctioning or failing. Arrangement of components and the like can be designed freely as appropriate.

  According to the present invention, it is possible to store the power supply in at least one of the plurality of legs that support the instrument main body with a simple structure, and thereby the power supply can be separated from the instrument main body. Since it is arranged, not only can the power supply be exchanged easily, but it can also be prevented from causing malfunction or failure due to adverse effects on other parts arranged in the instrument body. An excellent effect is obtained in that the degree of freedom in design in the section is increased.

  Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

  An electronic keyboard instrument according to the present invention will be described with reference to FIGS. FIG. 1 is a diagram showing an embodiment of the overall structure of an electronic keyboard instrument according to the present invention. 1A is an external perspective view, FIG. 1B is a front view, and FIG. 1C is a side view. The electronic keyboard musical instrument shown in this embodiment is composed of a musical instrument control unit G that includes the keyboard K and is the heart of the electronic keyboard musical instrument, and a resin material that forms one musical instrument casing (musical instrument main body) by being combined with each other. An upper casing U (upper case) and a lower casing D (lower case), a reinforcing member LT attached so as to be sandwiched between the upper casing U and the lower casing D, and a bottom surface of the instrument casing It can be roughly divided into a pair of leg portions P arranged in front of the left and right (or in the back of the left and right) and leg portions PM arranged in the center of the back (or in the front of the center).

  The upper casing U and the lower casing D are separate upper and lower cases molded from a resin such as plastic, and when these two upper and lower casings are combined with each other, only the keyboard K is placed on the surface. A musical instrument housing (so-called musical instrument body) can be formed in which the musical instrument control unit G is accommodated so as to cover other portions while being exposed. When forming this musical instrument casing, the auxiliary member LT attached so as to be sandwiched between the upper casing U and the lower casing D is more than the upper casing U and the lower casing D made of a resin member. It is made of a hard material having strength, for example, a metal member such as stainless steel that is strong and easy to process without rusting and is formed into a thin frame shape. The reinforcing member LT is not only designed for appearance, but also regulates the deformation of each case even if a strong deformation pressure is applied to the musical instrument case by an external force, causing damage to each case. This is to reinforce the strength of the musical instrument housing so as not to cause excessive deformation. In a musical instrument housing (musical instrument main body) formed by these, in addition to the keyboard K, an electronic instrument control unit G having a tone generator circuit, an amplifier, a speaker, etc. (not shown), and a printed circuit board for tone generation control (not shown) Components and the like can be fixed at appropriate positions.

  An upper housing U and a lower housing that house all of the components related to the musical tone generation control constituting the electronic keyboard instrument such as the musical instrument control unit G and the printed circuit board (however, components other than the power source as will be described later). For a musical instrument casing (musical instrument main body) that is combined with the casing D, for example, a pair of screws is provided via a screw hole (not shown) provided in the bottom plate of the lower casing D. By attaching a total of three legs, the leg P and one leg PM, the electronic keyboard instrument is supported so that the instrument housing is supported at a predetermined height (specifically, the height position of the keyboard K). It can be assembled. That is, the leg P and the leg PM are a lower casing that forms the lower portion of the instrument casing so as to support the instrument casing in a stable manner so that the keyboard K is kept substantially horizontal at a predetermined height. Removably connected or fixed to the bottom plate of D. At this time, the pair of leg portions P arranged on the bottom side of the musical instrument casing on the right and left sides are perpendicular to the bottom plate of the lower casing D, and the leg portion PM arranged at the center back is not the player, It is attached to the bottom plate of the lower housing D so as to be slightly inclined toward the front opposite to the front side.

  For the leg part PM, for example, by combining two sheets of a wide planar stainless steel plate processed into a substantially L shape, attaching the upper end to the bottom plate of the lower housing D while grounding the lower end, The leg PM is erected at the lower part of the musical instrument casing. For example, the leg portion PM includes two stainless steel plates PM1 and PM2 that are formed in a substantially L shape in advance from the ground contact surface to a predetermined section (specifically, to the Y-shaped branch point). The sections are combined so that they face each other, and they are welded with a stay member R (see FIG. 2 described later), so that the cross section in the predetermined section is formed in a substantially U shape. In this way, the assembled electronic keyboard instrument can be kept upright in a stable state. Further, the leg portion PM is formed in a substantially L shape and arranged so as to have surfaces facing each other, so that the lower tip portion serving as a ground contact surface in the leg portion PM is a pedal attachment portion PN (see FIG. 2 described later). At the same time, the foot pedal unit FP for controlling the musical tone by the player stepping on with his / her foot can be detachably installed. The detailed structure of the leg part PM will be described with reference to FIG.

  FIG. 2 is an enlarged view showing an embodiment of the entire structure of the leg portion PM disposed in the center back in the electronic keyboard instrument shown in FIG. 2A is an external perspective view, FIG. 2B is a side view, and FIG. 2C is a back view. However, for easy understanding of the explanation, FIG. 2 (a) shows a state where the foot pedal unit FP is removed, and FIG. 2 (b) shows that the front stainless steel plate PM2 constituting the leg portion PM is removed. Shows the state.

  When viewed from the side, the leg PM is formed in a substantially L shape as shown in FIG. 2A or 2B, while the leg PM is viewed from the back (or front) as shown in FIG. As shown in a) or FIG. 2C, it is formed in a substantially Y-shaped (or substantially T-shaped) shape. At the upper end of the leg portion PM, a lower casing connecting portion PS of a predetermined length extending in the horizontal direction so as to be parallel to the bottom surface of the lower casing D (see FIG. 1) is formed. On the other hand, a plurality of screw holes H for connecting the leg portions PM are provided. In this example, two screw holes H are provided for each of the four lower housing connection parts PS. When attaching such a leg part PS to the lower casing D, the lower casing connecting part PS is in contact with the bottom surface of the lower casing D, and the lower casing D is threaded from below through the screw holes H. Screw on the bottom. As described above, the leg portion PM has a substantially L-shaped shape to achieve front-rear stability, and the substantially Y-shaped shape achieves left-right stability and ensures strength, thereby ensuring the instrument housing. The body is held stably and surely underneath.

  In the leg portion PM, the stainless steel plates PM1 and PM2 are arranged so as to face each other, and when they are welded by the stay member R while maintaining the state, the cross section can be formed in a substantially U-shape, The portion formed in the substantially U-shape (in the figure, a straight portion and a thick leg portion having a width) secures a hollow portion (space) consisting of a predetermined space in the leg portion PM. Become. In the secured cavity, the components for driving the electronic keyboard instrument, that is, the parts in the instrument control unit G and the foot pedal unit FP (the portions hatched in FIG. 2B) are respectively provided. A power supply E that supplies power (voltage / current) necessary for driving can be installed (see FIG. 2B or FIG. 2C). As a method for attaching the power source E, any appropriate method may be used as long as the power source E can be fixedly attached to the hollow portion, for example, a magnet, a screw, or a locking member. Good. As described above, in the electronic keyboard instrument shown in FIG. 1, the leg part PM is not only a support leg for supporting the instrument main body part G but also a power source for storing the power source E at a position away from the instrument main body part G. Also serves as a built-in leg.

  A concave cord housing groove CM extending upward and downward along the leg portion PM is formed in the inner wall portion of the leg portion PM from the cavity portion where the power source can be installed (FIG. 2 (a) or (Refer FIG.2 (b)). The cord storage groove CM includes a cord (for example, a power cord) for supplying power from the power circuit E installed in the leg portion PM to each component in the musical instrument control unit G and the foot pedal unit FP, and instrument control. A cord (for example, a cable such as a signal line) for transmitting and receiving various control signals between the part G and the foot pedal unit FP is accommodated. That is, the external power cord C is drawn into the power source E from below the leg PM, and the cord C from the power source E is directed to the instrument main body G located above the leg PM, so that the cord in the leg PM I try to crawl C. In other words, the cord storage groove CM is for orderly storing the cord C so that the cord C does not protrude from the inside of the leg PM by inserting the cord C.

  A cartridge-type foot pedal unit FP with a sensor unit S, which generates a signal for controlling a musical tone by a player's operation with a foot, is detachably installed at the lower end portion of the substantially L-shaped leg portion PM. A convex pedal mounting portion PN is formed toward the performer so that it can be performed. That is, the pedal mounting portion PN has left and right wall surfaces formed in a convex shape so as to rise in the vertical direction, and this convex portion is formed on the bottom surface of the plate-like foot pedal FS of the foot pedal unit FP. A box-shaped detection unit CT of the foot pedal unit FP is provided between the left and right wall surfaces standing in the vertical direction of the pedal mounting portion PN so as to be hooked with a provided concave rectangular hole (not shown). The foot pedal unit FP can be installed at the position so as to be sandwiched. The foot padal unit FP that can be installed at the position is made of a material such as rubber or aluminum and swings up and down with the player side as a fulcrum in accordance with the stepping action by the player's foot, and the foot pedal FS. And a box-shaped detection unit CT including a sensor unit S that outputs a predetermined tone control signal. The detection part CT has a width that is almost the same as the distance between the two stainless steel plates PM1 and PM2 welded by the stay member R so as to face each other, and the height of both wall surfaces of the pedal attachment part PN. It is formed to have almost the same height. The wall portion also serves as a stopper with respect to the stepping direction of the foot pedal FS. That is, when the detection part CT of the foot pedal unit FP is attached so as to be sandwiched between the wall parts, a stopper that stops the depression of a certain degree or more when the foot pedal FS disposed at the upper part of the detection part CT is depressed. Therefore, the sensor unit S can be correctly adjusted so that a musical tone control signal corresponding to the depression amount is output with reference to the depression amount stopped by the stopper.

  In addition, the convex wall part in the pedal attachment part PN is not limited to the one formed in advance with the leg part PM, but this wall part is fixed to the leg part PM later by screws or welding. There may be. However, if it is integrally molded with the leg part PM, the strength is high and the formation is also solid, so that there is little possibility of damage even if the foot pedal FS is stepped on violently.

  The cord for transmitting various signals from the foot pedal unit FP to the musical instrument control unit G, like the power cord from the power source E, crawls the inside of the leg part PM through the cord storage groove CM provided on the inner wall surface of the leg part PM. Is done. That is, the wiring from the foot pedal unit FP is connected to the musical instrument control unit G through the leg portion PM. By passing the cord from the foot pedal unit FP through the inside of the leg portion PM, the appearance does not deteriorate and it is difficult to break the cord.

  As described above, in the electronic keyboard musical instrument shown in this embodiment, since the power source E can be detachably disposed at a thick leg portion as a support of the leg portion PM that supports the musical instrument casing, In addition to being able to fit and store a bulky power supply E, the power supply E can be easily replaced at the time of maintenance and replacement, and the heavy power supply E is placed at a relatively low position compared to the conventional case. Therefore, the stability of the electronic keyboard instrument itself may be increased. Further, since the power source E is stored at a position away from the instrument main body G, it is not necessary to provide a space for power source arrangement in the instrument main body G, and the design of the arrangement of each component in the instrument main body G is eliminated. There is a degree of freedom. In addition, a heat dissipation effect is obtained, and it is not necessary to consider the adverse effects associated with the operation of the power supply for various components in the instrument main body G, and each component can be arranged at an appropriate position in the instrument main body G. . Since the code has been passed through the leg PM, it looks neat and clean.

  Further, when the foot pedal unit FP is required, as described above, the foot pedal unit FP can be easily detachably installed by a simple structure in which the foot pedal unit FP is sandwiched below the leg part PM. The increase in the number of parts to be newly provided for installing the unit FP can be minimized as compared with the conventional one, and the foot pedal unit FP is installed in the leg part PM, so that it can be designed as a musical instrument. Can be simple and stylish. Further, since the cord from the foot pedal unit FP is wound around the leg portion PM, there is almost no possibility that the user's foot is caught without the cord becoming an obstacle.

In the above-described embodiment, the leg portion PM in which two stainless steel plates formed in a substantially L-shape are welded by the stay member R is shown as an example. However, the present invention is not limited thereto, and one stainless steel plate is connected. It is formed by bending or the like so that it has at least surfaces facing each other so that the cross section from the ground to a predetermined section is substantially U-shaped, and is separately prepared in advance for the lower end portion that becomes the ground contact surface The leg portion PM may be formed so that the whole is substantially L-shaped by newly welding a plate member having a predetermined shape (a member forming the pedal attachment portion PN as shown in FIG. 2). . Alternatively, a leg portion PM is formed by punching a single stainless steel plate into a shape of a combination of two stainless steel plates PM1 and PM2 each having a substantially L shape, and bending this into a substantially U shape. You may do it. In any case, the structure of the leg part PM is simpler than the conventional structure.
In the electronic keyboard device according to the present invention, the leg portion P and the leg portion PM are not limited to the stainless steel plate as described above, but are strong and light, have high thermal conductivity, provide a heat dissipation effect, and have a shape. Any material may be used as long as it is made of a material that can be freely determined and easily processed.

In the above-described embodiment, the example in which the two stainless steel plates PM1 and PM2 forming the leg part PM are arranged in the left-right direction is shown, but the leg part PM is not limited to this and arranged in the front-rear direction. May be formed. In this case, however, a pedal mounting portion PN having a shape as shown in FIG. 2A is arranged on the back surface of the stainless steel plate arranged on the player side.
In addition, what the leg part PM is comprised by the substantially T shape shall also be included in a substantially L shape in this specification. Further, the leg portion P may be formed in a substantially L shape so that the stability of the electronic keyboard instrument can be further improved.

  In addition, it is good to enable it to attach a cover to the back surface of leg part PM. If the cover is provided after the power supply E is stored, not only the strength of the leg PM itself can be reinforced by the cover, but also the power supply E disposed in the leg PM, the cord passing through the leg PM, etc. Can be protected from dust, dirt, or water, and the code is not visible from the outside, so it can be clean. Furthermore, such a cover may be attached to the back surface of the leg portion PM so as to be rotatable, and the power source E may be attached to the surface of the cover on the inner side of the leg portion PM. In such a case, the back surface of the leg portion PM can be appropriately opened and closed by the rotatable cover, and the power source E stored in the leg portion PM can be easily taken out simply by opening the cover. It becomes very convenient.

In addition, when connecting the leg part P to the back surface of the lower housing | casing D, it is good to connect so that the upper end part of the leg part P may be arrange | positioned in the position which contact | abuts or adjoins to the reinforcement member LT. In this way, in addition to the leg portion P supporting the lower housing D from below, a part of the upper end surface of the leg portion P supports the reinforcing member LT made of a member harder than the lower housing D from below. As a result, the instrument housing can be supported more safely.
In order to emphasize the interior, it is desirable to eliminate cords and cables as much as possible. As one method for that purpose, for example, the power source E may be battery driven. From the viewpoint of emphasizing the interior, it is indispensable to reduce the thickness in order to form a musical instrument casing more stylishly. For this purpose, each component constituting the electronic keyboard instrument is stored in the lower casing D. Without using the device, some parts such as the tone generator circuit, amplifier, speaker, etc. are configured in a separate device, and the instrument control unit G transmits a MIDI signal to the separate device wirelessly. You may make it comprise so that formation-sound emission may be carried out. In this way, it is possible to reduce the power consumption of the musical instrument control unit G when a musical sound is generated, and the musical instrument control unit G can be driven for a long time by a battery. .

BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which showed one Example of the whole structure of the electronic keyboard musical instrument which concerns on this invention, Fig.1 (a) is an external appearance perspective view, FIG.1 (b) is a front view, FIG.1 (c) is a side view. . FIG. 2 is an enlarged view showing an entire structure of a leg portion disposed at the center back in the electronic keyboard instrument shown in FIG. 1, FIG. 2 (a) is an external perspective view, FIG. 2 (b) is a side view, and FIG. ) Is a back view.

Explanation of symbols

P (PM) ... Leg, U ... Upper housing (upper case), D ... Lower housing (lower case), G ... Instrument control unit, K ... Keyboard, LT ... Reinforcement member, FP ... Foot pedal unit, S ... Sensor part, E ... Power supply circuit, C ... Cord, R ... Stay member, PS ... Lower housing connection part, PN ... Pedal mounting part, CM ... Cord storage groove, FS ... Foot pedal, H ... Screw hole, CT ... Detector

Claims (2)

A musical instrument main body having a keyboard including a plurality of white keys and black keys, and electrically outputting a predetermined signal for each key in response to a key pressing operation on each key;
A plurality of legs that support the instrument body at a predetermined height;
A power supply for supplying power to the instrument body,
At least one leg portion of the plurality of leg portions is formed in a shape having surfaces facing each other, and the power source is accommodated in a hollow portion having a predetermined width secured between the two facing surfaces. An electronic keyboard instrument characterized by   At least one leg of the plurality of legs has a concave shape with a predetermined depth for housing a cord connected to a power source housed in the cavity on at least one of the mutually facing surfaces. The electronic keyboard instrument according to claim 1, further comprising a groove portion formed in the electronic keyboard.

Images