JPH0446313Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a pedal keyboard mounting structure for an electronic musical instrument that allows the pedal keyboard to be easily mounted from below the main body of the musical instrument.

[Conventional technology]

Conventionally, electronic organs have been equipped with a pedal keyboard 3 consisting of a plurality of foot keys 3a arranged at the lower front of the musical instrument main body 2, as shown in FIGS. 6 and 7. The musical tone output is controlled to generate musical tones with rich playability. Each foot key 3a has an engagement groove 4 provided on the upper surface of its rear end and an engagement protrusion (not shown) provided in the frame 5.
The intermediate portion is held on the lower surface of the frame 5 through parts such as the spacer 6, the screw 7, the nut 8, and the spring 9, and is rotated by a small angle in the vertical direction using the engagement groove 4 as a rotation fulcrum. It is configured to be moved (oscillated).

On the other hand, the bent portion 5a provided at the front end of the frame 5 is fixed by a set screw 11 to the lower part of the inner surface of the front plate 10 constituting the instrument main body 2, and the rear end is located behind the upper surface of the bottom plate 12. Also set screw 1 at the end.
It is fixed by 3. Note that in FIG. 7, parts such as the spacer 6, screw 7, nut 8, etc. described above are omitted.

[Problem that the invention attempts to solve]

However, in the conventional pedal keyboard mounting structure described above, since the frame 5 is disposed within the instrument body 2, it is necessary to remove the back plate 14 for installation and removal during assembly, maintenance, inspection, replacement, etc. Therefore, the work was troublesome. Furthermore, when the frame 5 is assembled into the instrument body 2, it is necessary to provide a cutout hole 15 in the upper bottom plate 12 where the foot keys 3a are attached to the lower surface of the frame.
Not only did this reduce the strength of the sound, but it also had disadvantages such as poor bass characteristics due to poor airtightness.

[Means for solving problems]

The pedal keyboard mounting structure for an electronic musical instrument according to this invention was made in view of the above-mentioned points. An engaging part is provided behind the engaging part, and a fixing part of a predetermined height is provided facing upwards of the frame, and the engaging part is press-fitted into the lower front part of the bottom plate or front plate of the instrument body. A frame locking member having a holding part that holds the engaging part by mating is disposed, the fixing part is fixed to the rear part of the bottom plate or the lower part of the back plate, and the foot key is attached to the frame side. The frame has a through hole formed at a position corresponding to the actuator, and the switch is inserted into the space formed by the frame, the engaging part, the fixing part, and the bottom plate. It is arranged in accordance with the following.

[Effect]

In this invention, the foot key is swingably disposed on the lower surface of the frame. The frame has an engaging part and a fixing part, the engaging part is held by the holding part of the frame locking member provided on the instrument body side, and the fixing part is fixed to the instrument body side by fastening means etc. Ru. Therefore, there is no need to remove the back plate or provide a cutout hole in the bottom plate when attaching the frame.

〔Example〕

This invention will be described in detail below based on embodiments shown in the drawings.

FIG. 1 is a side sectional view showing an embodiment of the pedal keyboard mounting structure according to the invention before installation, and FIG. 2 is a perspective view of the main part of the frame locking member. Components that are the same as those in FIGS. 6 and 7 are designated by the same reference numerals. In these figures, a frame locking member 20 for holding and fixing the front end of the frame 5 is disposed at the front end of the lower surface of the bottom plate 12.

The frame locking member 20 is formed by pressing a metal plate and extends long in the left-right direction of the instrument body 2, and is a vertical member fixed to the lower part of the inner surface of the front plate 10 by a set screw 21. Base 20A
A lower bent portion 20 is formed by bending the lower end portion of the base portion 20A rearward at a substantially right angle.
B, and a plurality of upper bent portions 20C, which are similarly formed by bending the upper end portion of the base portion 20A at appropriate intervals rearward at approximately right angles in the longitudinal direction.
Each upper bent part 20C is fixed to the lower surface of the bottom plate 12 by a set screw 22, and together with the lower bent part 20B constitutes a holding part 23 that holds the front end of the frame 5. ing. Note that screw mounting holes 24 and 25 are formed in the base portion 20A and the upper bent portion 20C, respectively.

In this case, in this embodiment, the front end of the bottom plate 12 is fixed to the lower end of the inner surface of the front plate 10 via the frame locking member 20, but the present invention is not limited to this.
2 may be directly fixed, and the frame locking member 20 may simply be fixed to the lower front end of the bottom plate 12. In that case, the frame fixing member 20 may be formed into a substantially U-shape.

The frame 5 to which the foot key 3a is attached is formed in a flat plate shape as in the conventional case, but its front and rear ends are bent upward at a right angle, and the tip is bent rearward. substantially hook-shaped engaging portion 2
7 and a fixing part 28 are each provided integrally. The height of the engaging portion 27 is greater than the height of the lower bent portion 2.
Almost equal to the distance between 0B and the upper bent portion 20C,
Further, the horizontal portion 27a of the engaging portion 27 is inclined forwardly and downwardly so that its tip portion is higher. Although the engaging portions 27 are formed corresponding to the respective vertical mounting portions 20D of the frame locking member 20, the engaging portions 27 are not limited thereto and may be formed over the entire length of the frame 5. The fixing part 28 is provided over the entire length of the frame 5 in the longitudinal direction, and its horizontal part 28a has a plurality of screw holes 29 which are substantially horizontal and formed at appropriate intervals.

Although there are various possible mounting structures for the foot key 3a to the frame 5 other than the conventional structure shown in FIG. 5, it is required that the structure be simple and the mounting easy. Therefore, in this invention, a mounting structure as shown in FIG. 1 is adopted as one that satisfies the above requirements. This mounting structure has already been described in detail in Utility Application No. 59-75875 (U.S. Pat. No. 60-189093) filed by the applicant, so it will be briefly explained here.
The foot key 3a is supported at its rear end by a support shaft 30 vertically disposed vertically at the front end of the lower surface of the frame 5, and supported by a spring 31 disposed behind the support shaft 30.
The rear end is pressed by the force of the spring 31 onto a hook-shaped stopper 32 provided at the rear end of the lower surface of the frame 5. Elastic members 34 and 35 are respectively disposed on the upper and lower surfaces of a cylindrical portion 33 provided on the foot key 3a and through which the support shaft 30 passes, and the first half of the lower surface of the cylindrical portion 33 is provided with a rotation portion of the foot key 3a. In order to make the movement smooth, a slope 36 is formed by cutting off at an appropriate angle downward to the right in the figure. Furthermore, a protruding strip 37 constituting a rotational fulcrum of the foot key 3a is provided at the central portion of the lower surface of the cylindrical portion 33 in the front-rear direction to protrude in a direction perpendicular to the longitudinal direction of the foot key 3a. The elastic body 34, which is interposed between the frame 5 and the upper surface of the cylindrical portion 33, has a rectangular cross-sectional shape and a substantially C-shape in plan view, and the lower surface side of the open end thereof is connected to the foot key 3a.
It is cut off to the left to make it easier to rotate.

A spring storage recess 40 is provided at the rear end of the upper surface of the foot key 3a.
An actuator 41 is integrally protruded from behind the actuator 41, and a through hole 42 is formed in the frame 5 corresponding to the actuator 41, and a switch 43 is provided. The switch 43 is operated by the actuator 41 when the foot key 3a is depressed, and the volume of the musical tone output is controlled by the signal.

Next, a procedure for attaching the pedal keyboard 3 to the musical instrument main body 2 will be explained.

A predetermined number of foot keys 3a are sequentially assembled to the lower surface of the frame 5, and the squeegee 41 of each foot key 3a is
The assembly work of the pedal keyboard 3 is completed by attaching the switch 43 to the top surface of the frame in accordance with the above.
Thereafter, this is attached to the lower surface of the musical instrument main body 2 using the frame locking member 20 and a set screw as a fastening means. That is, as shown in FIG. 3, the engaging part 27 of the frame 5 is press-fitted into the holding part 23 of the frame locking member 20 from the rear, and then the fixing part 29 is attached to the rear end of the lower surface of the bottom plate 12 with a set screw 46. and complete the installation of the pedal keyboard 3.

Here, the engaging part 27 is press-fitted into the holding part 23 while the horizontal part 27a contacts the lower surface of the bottom plate 12 and is elastically deformed downward, so that rattling in the vertical direction is prevented, and the horizontal part 27a The two horizontal portions 27a on both sides are the left and right upper bent portions 20.
The inner horizontal portion 27a located on the outside of B is located between the adjacent upper bent portions 20B and maintains pressure contact with the lower surface of the bottom plate 12, thereby preventing rattling in the left-right direction. Therefore, the pedal keyboard 3 is positioned and fixed at a predetermined position.

Thus, according to such a mounting structure for the pedal keyboard 3, the pedal keyboard 3 can be mounted to the lower part of the bottom plate 12 from the lower part of the musical instrument main body 2, so that the conventional mounting structure in which the frame 5 is disposed inside the musical instrument main body 2 is avoided. Compared to the structure, the installation work is easier and faster, and automatic assembly is possible. In addition, the engaging portion 2 of the frame 5
7 by the holding part 23 of the frame locking member 20 and fixing the fixing part 28 to the lower surface of the bottom plate with the setscrew 46.
The number of 6 pieces can be reduced by half, and the installation work can be made easier. Furthermore, since there is no need to provide a cutout hole in the bottom plate 12, the strength of the musical instrument main body 2 is improved, and the degree of sealing is improved, making it possible to obtain an electronic musical instrument with excellent acoustic effects. In addition, since electric components such as a power supply unit can be mounted in the gap between the bottom plate 12 and the frame 5, the space factor within the musical instrument body 2 is improved.

FIG. 4 is a perspective view of a main part of a frame showing another embodiment of this invention. In this embodiment, the fixing part 28, which is integrally provided at the rear end of the frame 5, is composed of bent pieces that are bent upward at a substantially right angle, and the fixing parts 28 are provided at appropriate locations offset in the height direction and alternately. A plurality of screw mounting portions 5 are curved in a substantially semicircular shape in the opposite direction.
0, and a set screw is inserted into this screw attachment portion 50 from below to fix the fixing portion 28 to the lower surface of the bottom plate.

FIG. 5 is a side sectional view of a pedal keyboard mounting structure showing another embodiment of this invention.
Electronic musical instrument housing 2 with a small distance between 0 and the back plate 14
A pedal keyboard 3 is attached to the keyboard. In this case, a plurality of engaging parts 27' are provided at approximately the center of the frame 5 by cutting and bending the frame 5, etc., and the engaging parts 27' are inserted and engaged with the holding part 23 from the rear, and the rear fixed part 28 may be screwed to the lower surface of the bottom plate 12 as in the previous embodiment, and the exposed fulcrum portion of the pedal keyboard 3 may be covered with a cover 100 attached to the lower part of the front plate.

Note that this invention is not limited to the structure of the embodiment shown in FIGS. 1, 2, 4, and 5; for example, the horizontal piece 27a of the locking part 27 is Of course, the U-shaped members of the engaging portion 27 and the holding portion 23 may be provided in opposite directions.

[Effect of idea]

As explained above, the pedal keyboard mounting structure for an electronic musical instrument according to the present invention is such that the holding part of the frame locking member attached to the lower front part of the bottom plate or the front plate is
Since the engaging part provided on the frame is press-fitted and the fixing part provided at the rear end of the frame is fixed to the rear part of the lower surface of the bottom plate or the lower part of the back plate, it is possible to This makes it possible to install and improve the workability of installation and removal. Further, the structure of the frame locking member and the frame is simple, and there is no need to provide a cutout hole in the bottom plate, which increases the strength of the musical instrument body, reduces sound leakage, and improves acoustic effects.

[Brief explanation of the drawing]

Fig. 1 is a side cross-sectional view showing an example of the pedal keyboard mounting structure according to this invention before installation, Fig. 2 is a perspective view of the main part of the frame locking member, and Fig. 3 shows the pedal keyboard mounted on the bottom surface of the bottom plate. 4th sectional side view showing the state
FIG. 5 is a side sectional view showing another example of the pedal keyboard mounting structure according to the invention; FIG. 6 is an exploded perspective view of a conventional pedal keyboard; FIG. 7 is a side sectional view showing a conventional pedal keyboard mounting structure. 2... Instrument body, 3... Pedal keyboard, 3a...
Foot key, 5...Frame, 10...Front plate, 12...
Bottom plate, 14... Back plate, 20... Frame locking member, 23... Holding part, 27... Engaging part, 28...
Fixed part, 46...set screw.

Claims (1)

[Scope of utility model registration request] An engaging part of a predetermined height facing upward is provided on the front end side of the frame on which the foot lock is swingably disposed on the lower surface, and an engaging part of a predetermined height facing upward of the frame is provided behind this engaging part. A frame locking member is provided at a lower front portion of the bottom plate or front plate of the musical instrument main body, and has a holding portion that holds the engaging portion by press-fitting the engaging portion; A fixing part is fixed to the rear part of the bottom plate or the lower part of the back plate, the foot key has an actuator protruding from the frame side, and the frame has a through hole formed at a position corresponding to the actuator. A pedal keyboard mounting structure for an electronic musical instrument, characterized in that a switch is disposed in a space formed by the frame, the engaging part, the fixing part, and the bottom plate in correspondence with the actuator.