JPS5926384Y2 - musical instrument pedal device - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a pedal device for a musical instrument.

The drawing shows this idea applied to an applied piano; in the drawing, 10 is the front base plate located at the lower end of the piano front;
1 is a bottom plate that covers the bottom surface.

Reference numeral 12 denotes a pedal, which is positioned through an opening 18 formed in the front base plate 10 so as to be cut downward.

Reference numeral 13 denotes a support base for supporting the pedal 12, which is fixed to the bottom plate 11 with screws 19 and has a pair of left and right side walls 13a, 13a rising parallel to both left and right sides of the pedal.

Each of the left and right side walls 13a has a receiving portion 14 cut out in a semicircular shape toward the bottom at a portion facing the rear end portions of the left and right sides of the pedal.

The receiving portion 14 is provided with a groove 14a that is continuous from the lower end thereof, extends obliquely upward, and is open to the upper surface of the support base.

Reference numeral 15 denotes a cylindrical shaft that is horizontally fitted and fixed to the rear end of the pedal 12, and both ends thereof protrude to the left and right sides of the pedal.

Reference numeral 16 denotes a synthetic resin bushing fitted to both ends of the shaft 15, and is composed of a cylindrical base 16a and a cylindrical column 16b coaxially formed on the upper surface thereof and having a smaller diameter than the base 16a. , the shaft 15 is located at the coaxial center thereof.
A shaft hole 16C into which a shaft hole 16C can be inserted is bored through the shaft hole 16C.

The diameter of the cylinder 16b is set to be approximately equal to the diameter of the semicircular notch of the receiving portion 14.

Reference numeral 17 denotes a suspension rod connected to a damper or soft mechanism of the piano, and is biased upward by a spring.

The lower end of the hanging rod 17 is connected to the portion of the pedal 12 between the shaft 15 and the opening 18, and urges the pedal 12 upward.

Reference numeral 20 denotes a cushioning felt attached to the upper edge of the opening 18.

The shaft 15 is fixed to the pedal 12, and the opening 18 is opened from the front of the piano.
(If the pedal is slightly diagonal to the opening, the shaft 15 will easily pass through the opening.)

Then, the suspension rod 17 is connected to the pedal 12, and the shaft 1
5 is inserted into the receiving part 14 from the groove 14a of the support base 13.

As a result, the pedal 12 is urged upward by the suspension rod 1f, but the upper surface of the pedal comes into contact with the upper edge of the opening 18, and the retaining part 15a, which is a semi-cylindrical convex surface on the upper half of the shaft 15, is pressed against the button. By abutting the receiving portion 14 from below via the pedal 16, the pedal 12 is held in place.

When the front end of the pedal 12 is stepped on, the pedal 12 rotates about the shaft 15 as a fulcrum as shown by the two-dot chain line in FIG.

Even during this rotation, the engaging portion 15 a is held within the receiving portion 14 because it is biased upward by the hanging rod 17 .

At this time, since the bushosh is made of synthetic resin, no noise is generated when the pedal is operated.

Further, since the diameter of the cylinder 16b of the bushing 16 is set to be approximately equal to the diameter of the receiving portion 14, the shaft 15 will not shift when the pedal is operated.

In both of the above embodiments, the upper edge of the opening 18 allows the pedal 1
Although upward movement of the front portion of the support base 13 is prevented, the upper front end of the side wall 13a of the support base 13 may be bent horizontally to form a blocking portion.

As described above, this invention provides a pair of retaining parts that protrude in the shape of a shaft on both the left and right sides of the rear end of the pedal, and a notch in the support base that extends downward to receive the engaging parts from below. By providing a semicircular receiving part and a groove that is continuous from the lower end of the receiving part, extends diagonally forward upward, and is open on the top surface of the support base, the retaining part can be attached to the support part through a synthetic resin bushing. Just by inserting the pedal downward into the receiving part, the engaging part rotatably contacts the receiving part due to the bias of the hanging rod, and the upper surface of the front part of the pedal also contacts a blocking means such as one edge of the opening, and the pedal Since the pedals are held in place, the pedals can be attached and removed very easily, which is advantageous during assembly or for repair and inspection.

Further, since the engaging portion is inserted into the receiving portion via the synthetic resin bushing, no noise is generated when the pedal is operated.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a pedal device that embodies this invention, FIG. 2 is a cross-sectional view taken along the line 2--2 in FIG. 1, and FIG. 3 is an exploded perspective view of the main parts. Explanation of symbols: 12: pedal, 13: support base, 14: receiving portion, 15a: engaging portion, 17: connecting member (hanging rod).

Claims (1)

[Scope of utility model registration request] A device in which the rear end of the pedal is rotatably supported around a horizontal axis with respect to a support provided within the main body of the musical instrument. At the same time, the support base includes a semicircular receiving part that is cut out downward to receive the engaging part from below, and a semicircular receiving part that is continuous from the lower end of the receiving part and extends diagonally forward and upward to the upper surface of the support base. a groove opened at the bottom of the pedal, and a blocking means that engages with the upper surface of the intermediate portion in front of the pedal at a distance from the retaining portion to prevent upward movement of the pedal, and the blocking device and the engaging portion A connecting member connected to the operating mechanism of the musical instrument and biased upward is coupled to the pedal portion between the two, and the biased connecting member biases the pedal upward to bring the pedal into contact with the blocking means. A pedal device for a musical instrument, in which an engaging part is rotatably brought into contact with a receiving part via a synthetic resin bushing.