JP5286500B2 - Electronic board mounting device for piano - Google Patents

Description

  The present invention relates to an electronic board mounting mechanism for use in a piano which is a keyboard instrument having a plurality of keyboards.

  A piano provided with a keyboard portion composed of a plurality of keyboards is configured such that a musical tone signal is output when a user performs a key release operation. There have been various devices for obtaining a key pressing speed and a key displacement amount and reflecting them in a musical tone output when a user presses and releases a key. For example, a photo reflector is provided for each key, a detection voltage detected according to the amount of reflected light received by the key is obtained, and the obtained detection voltage is substituted into a preset approximate expression to obtain a key displacement amount. A key displacement amount detection device to be obtained has been proposed (for example, see Patent Document 1).

Japanese Patent No. 2727719 (page 2-3, FIG. 6)

  However, in the key-pressing speed detection device and the key displacement amount detection device as described above, no special consideration has been given to the mounting structure of the electronic board on which electronic components and the like are mounted. Therefore, there have been the following problems. This will be described with reference to FIG. FIG. 4 is a plan view schematically showing the internal structure of the grand piano as viewed from above, and the XY direction in the figure is an arrangement direction of keys (not shown). As shown in FIG. 4, the transverse members 200a and 200b are arranged at appropriate intervals inside the grand piano. Further, four (not limited to four) longitudinal members 210a, 210b, 210c, and 210d are arranged at appropriate intervals in a direction perpendicular to the extending direction of the transverse members 200a and 200b. Yes. And in order to fix the board | substrate 250 shown with a dotted line, a screw hole is provided in the board | substrate 250 side of the position corresponding to each of the vertical members 210a, 210b, 210c, 210d, and the board | substrate 250 is fixed to the vertical member 210a by screwing. It was fixed at ~ 210d. However, since the installation intervals of the vertical members 210a to 210d differ depending on the manufacturer and model, in order to attach the substrate 250 to various pianos, it is necessary to provide screw holes in the substrate and the substrate fixing member so as to match the structure. there were. For this reason, it is necessary to widen the width of the board or board fixing member by the amount of the screw hole, which increases the cost, and increases the man-hours for mounting the board, such as providing a mounting part on the piano side where it fits the screw hole. It was an invitation.

  The present invention has been made to solve such a conventional problem, and is an apparatus that can easily attach an electronic board on which electronic parts for music are mounted even if the internal structure of the piano changes. The purpose is to provide.

In order to achieve the above object, the present invention provides an apparatus for mounting an electronic component for piano (12) and fixing an electronic substrate (10) that is long in the direction in which the piano keys are arranged,
A board fixing member (20) which is long in the direction of arrangement of the piano keys for mounting the electronic board (10) on its upper surface;
A slide member (30) that is attached to both ends of the substrate fixing member (20) in the short direction and is slidable in the piano key arrangement direction, which is the longitudinal direction of the substrate fixing member (20); Prepared,
The slide member (30) is configured to be fastened to a piano-side member at an appropriate position slid in the longitudinal direction of the substrate fixing member (20) .

  According to the present invention, the slide member is mounted on the board fixing member that is long in the arrangement direction of the piano keys for mounting the electronic board on its upper surface, and can slide in the longitudinal direction of the board fixing member. Since the slide member can be fastened to the piano-side member, it is possible to cope with any interval between the piano-side longitudinal members.

In the above apparatus, the substrate fixing member is formed with recesses at both ends in the short direction, and the slide member is provided with a protrusion that fits into the recesses and can slide in the key arrangement direction. Thus, the present apparatus can be realized. Note that the convex portions of the substrate fixing member and the slide member can be configured in reverse. That is, it is realized by forming convex portions at both ends in the short direction of the substrate fixing member and providing the slide member with concave portions that can be fitted into the convex portions and slidable in the key arrangement direction. You can also. In particular, the sliding member becomes a more simple structure by a spring seat fixing the spring to the protrusion of the lower and having a screw hole, adjust the height of the electronic substrate according to Tightening of the spring It becomes possible to do.

  According to the present invention, it is possible to easily attach an electronic substrate on which music electronic components or the like are mounted even if the internal structure of the piano changes. Further, since the board and the board fixing member do not require a screw hole, the width of these parts can be minimized, and an effect of cost reduction can be expected.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Constitution)
FIG. 1 is a side view of a piano electronic board mounting apparatus 1 according to an embodiment of the present invention (an end portion in the longitudinal direction of the apparatus 1). This side view is a view of an end portion in a direction perpendicular to the direction in which a plurality of keys are arranged (not shown). FIG. 1A shows a state in which the spring seat 30 is not attached, and FIG. This is when the seat 30 is mounted. FIG. 2 is a configuration diagram of the spring seat 30. Figure 2 (a) is a view seen from the same direction as FIG. 1, FIG. 2 (b) is a view of FIG. 2 (a) from the code Z direction. In FIG. 1, the substrate 10 is hatched with diagonal lines in order to understand the structure of the apparatus 1, but the diagonal lines do not mean a cut surface.

  As shown in FIG. 1, an electronic component 12 is mounted on the upper surface of the electronic substrate 10, and the substrate 10 is fixed to the substrate fixing member 20 with screws 11. A pair of substantially U-shaped concave portions 22 is formed at the left and right ends of the electronic substrate 10 in FIG. 1 (longitudinal ends of the apparatus 1). The convex portion 32 of the spring seat 30 is fitted into the concave portion 22, and the entire spring seat 30 is configured to be slidable with respect to the longitudinal direction of the substrate fixing member 20. FIG. 6 is a drawing showing that the concave portion on the substrate fixing member 20 side and the convex portion 32 of the slide member (a spring seat 30 described later) can be configured in reverse. FIG. 6A shows a configuration in which the concave portion 22 is provided on the substrate fixing member 20 side and the convex portion 32 is provided on the slide member. On the other hand, FIG. 6B is a configuration example in which a convex portion 32 is provided on the substrate fixing member 20 side and a concave portion 22 is provided on the slide member. As described above, the recess 22 may be provided on the slide member side or on the substrate fixing member 20 side. As a result, the convex portion 32 can be provided on the slide member side or on the substrate fixing member 10 side.

As shown in FIG. 2 , the spring seat 30 has a cylindrical shape in which one surface is flat and the rest is a substantially semicircular shape, and a convex portion 32 is provided on the one flat surface. In addition, a hole 36 that penetrates the spring seat main body 34 in the vertical direction is provided, and a spring is attached to the protrusion 38 so that it can be screwed. A hole 36 is also passed through a protrusion 38 that protrudes below the spring seat 30. In this configuration, since the spring 28 is mounted, the height of the substrate 10 can be adjusted by adjusting the screwing amount.

  FIG. 5 shows a configuration example of the electronic component 12. The CPU 1100 is configured to execute a process according to a program recorded in the ROM 1110 while using the RAM 1120. Then, the CPU 1100 receives the detection amount detected by the key pressing amount detection unit 1000 and drives and controls the sound source 1200 in a required control mode. FIG. 5 shows an example of the electronic component 12, and the configuration of the electronic component 12 is not limited to the example of FIG.

(Function)
As shown in FIG. 1, the spring seat 30 is attached to the substrate fixing member 20 from the end in the longitudinal direction of the substrate fixing member 20. At this time, the spring seat body 34 is mounted on the board fixing member 20 so that the concave part 22 of the board fixing member 20 and the convex part 32 of the spring seat 30 are fitted. As a result, the spring seat 30 can slide in the longitudinal direction of the substrate fixing member 20. FIG. 3 is a diagram schematically showing this state, and shows a state in which the spring seat 30 can slide in the longitudinal direction (L and R directions shown in the drawing) of the substrate fixing member 20. Then, the spring seat 30 is fixed to a piano-side member (not shown) using a screw 25 at a desired position.

Accordingly, the spring seat 30 is configured such that the electronic board 10 is mounted on the board fixing member 20 that is long in the piano key arrangement direction and is slidable in the longitudinal direction of the board fixing member 20. Since it can be fastened to the member on the side, it is possible to deal with whatever the interval between the longitudinal members on the piano side is. Moreover, it also becomes possible to adjust the height of the substrate 10 in response to tighten Tsukekata spring 28.

  As described above, the present invention can be applied to a piano to provide a suitable device.

It is explanatory drawing of a structure of this apparatus. 3 is a configuration diagram of a spring seat 30. FIG. It is explanatory drawing of an effect | action. It is explanatory drawing of the internal structure of a piano. 2 is a configuration diagram of an electronic component 12. FIG. It is explanatory drawing of the formation state of the recessed part 22 and the convex part 32. FIG.

Explanation of symbols

1 Electronic board mounting device for piano
DESCRIPTION OF SYMBOLS 10 Electronic board 12 Electronic component 20 Board | substrate fixing member 22 Concave part 25 Screw 28 Spring 30 Spring seat 32 Convex part 34 Spring seat main body part 38 Protrusion part 36 Hole

Claims (2)

In an apparatus for mounting an electronic component (12) for a piano and fixing an electronic substrate (10) that is long in the direction in which the piano keys are arranged,
A board fixing member (20) which is long in the direction of arrangement of the piano keys for mounting the electronic board (10) on its upper surface;
A slide member (30) that is attached to both ends of the substrate fixing member (20) in the short direction and is slidable in the piano key arrangement direction, which is the longitudinal direction of the substrate fixing member (20); Prepared,
Mounting the electronic board for a piano, wherein the slide member (30) is configured to be fastened to a piano-side member at an appropriate position slid in the longitudinal direction of the board fixing member (20). apparatus. The apparatus of claim 1.
The slide member is a spring seat having a screw hole (36) and a spring (28) fixed to a projecting portion (38) below the screw hole, and the electronic board (10) according to the tightening amount of the spring (28). An electronic board mounting apparatus for a piano, characterized in that the height of the piano can be adjusted .

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