JPS5839517Y2 - Expression pedal foot switch lever mounting structure for electronic musical instruments - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a mounting structure for a foot switch lever that is attached to an expression pedal for adjusting the volume of an electronic musical instrument and is used to turn on and off autorhythm, vibrato effects, etc.

Fig. 1 shows an example of a conventional foot switch lever mounting structure, in which 1 is the treadle of an expression pedal, 2 is a stopper part 2a, 2b to which a piece of rubber or the like is attached, and a bearing. A pedal frame integrally formed with a portion 2C, 3 is a bearing portion 2C of the pedal frame 2.
is pivotally connected to the frame by a rotating shaft 4, and a spring 5 is connected between the frame fixing part and the frame fixing part.
6 is an operating member made of insulating rubber attached to one end of the foot switch lever 3, and 7 is the other end of the foot switch lever 3. 8 is a switch support plate integrally fixed to the pedal frame 2 via a support arm 9; 10 is a foot switch attached to the switch support plate 8 via a screw 10f; It consists of a fixed contact piece 10b supported by an insulating substrate 10a, an IOC, and a movable contact piece 10d located between them and having a spring force in the direction of contacting the fixed contact piece 10b.

Under normal conditions, the foot switch lever 3 is rotated to the left by the spring 5 against the spring force of the movable contact piece 10d, and the stopper portion 2
a, the actuator 7 presses the movable contact piece 10d against the fixed contact 10C.

Here, when the player presses the operating member 6 of the foot switch lever 3 in the direction of arrow A against the spring 5 and rotates the foot switch lever 3 to the right around the shaft 4, the actuator 7 moves into the movable contact piece. Since the restraint of 10d is released, the movable contact piece 1
0d contacts the fixed contact piece 10b by its own spring force, and autorhythm, vibrato, etc. are turned on and off.

However, with such a configuration, the foot switch lever 3 is attached to the bearing portion 2C of the pedal frame 2 by the rotating shaft 4, which has the disadvantage that not only is assembly troublesome, but also the shape of the pedal frame 2 is complicated. It had

This idea was made to eliminate the above-mentioned drawbacks, and the two ends of the foot switch lever at the pivot position are loosely supported on two support stands protruding from the back of the expression pedal footplate. , the foot switch lever is rotatably attached to a mounting base protruding from the back surface of the tread plate at the intermediate portion thereof by inserting and mounting means through an elastic body,
The present invention provides a foot switch lever mounting structure that is easy to assemble and has high productivity, in which the foot switch lever is used to control opening and closing of a foot switch provided on the back surface of the footboard.

Hereinafter, embodiments of this invention will be described with reference to FIGS. 2 to 6 of the accompanying drawings, and the same parts as in FIG.

Note that FIGS. 2 to 6 all show the expression pedal treadle viewed from below, and are shown in the same state as when assembled.

Figure 2 shows the state before the foot switch lever 3 is attached to the treadle 1 of the expression pedal.
is a plate-shaped protrusion 11 facing the foot switch lever pivot position on the back side of the tread plate 1 at a distance in the longitudinal direction of the tread plate 1;
Two foot switch lever supports 12, which integrate a, 11 a' and their supporting parts 11 b, 11 b', are provided protrudingly at a substantially central position between the support stands 11 and 11', and will be described later. A foot switch lever mounting base 1 having a threaded hole 12a forming an insertion mounting means together with a set screw 16
Reference numeral 3 denotes a foot switch lever stopper which is protruded close to the mounting base 12, has a lower surface slightly inclined downward in the width direction of the footboard 1, and has a buffer plate 13a such as a rubber plate attached thereto. It is.

These support bases 11, 11', mounting base 12, and stopper 13 may be formed integrally with the main body of the footboard 1 by molding or the like.

On the other hand, the foot switch lever 3 is provided with notches 3 a and 3 a' at both end portions of the foot switch lever 3 at the position where it should be pivoted to the footboard 1 (the position corresponding to the conventionally supported portion),
A third section is located approximately in the center between these two notches 3a and 3a'.
As clearly shown in the figure, a through hole 3b is drilled, and this through hole 3
A rubber bushing 15, which is an elastic body, is attached to b.

16 is a locking screw. The file configured in this way
To attach the switch lever 3 to the footboard 1, attach the notches 3a and 3a' of the footswitch lever 3 to the support base 11.
, 11', and insert the set screw 16 into the center hole 15a of the rubber bush 15 (see FIG. 3) and screw it into the threaded hole 12a of the mounting base 12.

4 and 5 are views showing the state in which the foot switch lever 3 is attached to the footboard 1 in this manner, and 17 is a space between the vicinity of the longitudinal end of the foot switch lever 3 and the back surface of the footboard 1. The engaged compression spring constantly urges the foot switch lever 3 to turn left to the position shown by the solid line in FIG.

In such a mounting structure, the foot switch lever 3
is held by a set screw 16, and the protrusion 11
Horizontal rotation is restricted by a and lla', and rotation by a predetermined angle in the direction indicated by arrow B in FIG. 5 is permitted by the elasticity of the rubber bushing 15.

The switch operated by the foot switch lever 3 may be similar to the foot switch 10 shown in FIG. 1, but in this embodiment a new foot switch is used, an enlarged cross-sectional view of which is shown in FIG. 14 is used.

This foot switch 14 is made of an elastic material such as insulating rubber, and has a substrate 14b on which a pair of fixed contacts 14a are formed according to a printed pattern, and a movable contact 14d made of conductive rubber or the like formed on a spacer 14C1 at a position opposite to the fixed contact 14a. It has a hole 14f through which the actuator 7 is inserted at a position corresponding to the movable member 14e and the movable contact 14d, and the elastic movable member 14e and spacer 14C are connected to the substrate 14.
The switch cover 14g is positioned and held on the switch cover 14g.

Therefore, the foot switch lever 3 is normally rotated to the left by the compression spring 17 and comes into contact with the side surface of the footboard 1, and is in the state shown by the solid line in FIG. The elastic movable member 14e of 14 is not pressed, and its rotational contact point 14d is spaced apart from the fixed contact point 14a.

Then, when the player presses the operating section 6 to the right in FIG.
is inserted through the hole 14f of the foot switch 14 and presses the elastic movable member 14e, so the movable contact 14d contacts the fixed contact 14a, causing conduction between the pair of fixed contacts and turning on the switch.

In the above embodiments, the means for inserting and attaching the foot switch lever and the treadle of the expression pedal was to insert a screw from the foot switch lever side into a threaded hole provided in the mounting base. A locking hole may be provided in the foot switch lever, and a pin, clip, etc. may be inserted from the foot switch lever side to attach the foot switch.

In addition, a through hole similar to the one made in the lever is made in the footboard, and a foot switch lever mounting base made of an elastic material such as rubber with a hole in the middle for a screw to be inserted is inserted into the through hole.
A screw may be inserted into this mounting base from the surface of the footboard and screwed into a tapped hole of a lever having a tapped hole drilled at a position corresponding to this mounting base.

As described above, according to this invention, the foot I switch lever can be easily attached to the footboard by the insertion attachment means, so assembly can be carried out in a short time.

In addition, the support base, mounting base, stopper, etc. provided on the back of the treadle are all integrally molded at the same time as the treadle, so there is no need for assembly. Since there is no need to provide a mold, the structure of the mold becomes simple, which greatly contributes to improving productivity and lowering prices.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of an expression pedal showing an example of a conventional foot switch lever mounting structure, Figs. 2 to 6 are views showing an embodiment of this invention, and Fig. 2 is an exploded perspective view of the main parts. Figure 3 is a sectional view of the rubber bushing insertion part in Figure 2, Figure 4 is a bottom view of the main part, Figure 5 is a sectional view taken along line II-II in Figure 4, and Figure 6 is the , is an enlarged sectional view of the foot switch in FIG. 5; 1...Expression pedal tread, 3.
...Foot switch lever, 3a, 3a'
...Notch, 7... Actuator,
11, 11'...Bearing base, 12...Mounting base, 13...Stopper, 14...Foot switch, 15...Rubber button , 16・
... Set screw, 17 ... Compression.

Claims (1)

[Scope of utility model registration request] A pair of foot switch lever supports are provided at the pivot position of the foot switch lever on the back side of the expression pedal treadle and are opposed to each other at a predetermined interval in the longitudinal direction of the treadle, and a mounting means is inserted between the pair of support stands. A foot switch lever mounting base is provided protrudingly provided, and a foot switch lever having a retaining portion as a rotational fulcrum that is loosely fitted with each of the above-mentioned support bases at both ends corresponds to the above-mentioned mounting base of the foot switch lever. In the electronic musical instrument, the electronic musical instrument is rotatably mounted on the mounting base by the insertion mounting means through an elastic body that is landed at a position where the foot switch is opened and closed by the foot switch lever. Expression pedal foot switch lever mounting structure.