JPH0538690U - Electronic musical instrument pedal device - Google Patents

Abstract

(57) [Summary] [Purpose] The swinging load of the tread is made variable to improve operability during performance. [Arrangement] An arcuate plate 4 centered on a pivot 2 is provided on the back surface of a tread 1 that is swingably mounted on a support base 3,
A pair of leaf springs 6a corresponding to the plate 4 on the support base 3,
6b is provided, and friction plates 10a and 10b made of a self-lubricating resin material are attached to the surfaces of the leaf springs 6a and 6b facing each other, and the plate 4 is held. Leaf springs 6a, 6b, friction plate 1
0a, 10b and the circular arc holes of the plate 4 are fitted with bolts 11, coil springs 13 are engaged between the nuts 12 and the leaf springs 6b, and the nuts 12 are rotated to cause friction with the plate 4. The frictional force with the plates 10a and 10b is made variable.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pedal device for an electronic musical instrument such as an electronic organ, and more particularly to a pedal device for an electronic musical instrument provided with a swing load adjusting means.

[0002]

[Prior Art]

 Generally, pedal devices for electronic musical instruments are widely used for volume control, tremolo speed switching, automatic rhythm on / off control, preset switching, and the like. Among them, what is usually called an expression pedal or a volume pedal is one in which the resistance value of the rotary volume is changed according to the stepped amount by stepping on the tread plate pivotally mounted on the support base with the foot. The sound output is controlled by opening and closing the shutter to change the amount of light reaching the light receiving element from the light source.

Conventionally, as a pedal device of such an electronic musical instrument, there is one as shown in, for example, Japanese Utility Model Laid-Open No. 61-27192 (Japanese Patent Application No. 59-111913). The structure will be briefly described with reference to FIG. 3. A plate 24 is provided on the back surface of the tread plate 21 pivotally mounted on a support base 23 so as to be close to a fulcrum (not shown) of the tread plate 21. The gripping plate spring 26 having a flask-shaped cross section disposed on the side of the supporting table 23 holds it, and a friction holding mechanism in which grease 30 is applied to the sliding contact surface is provided so that the tread plate 21 is rocked. It was done.

[0004]

[Problems to be solved by the device]

 However, in such a conventional pedal device for an electronic musical instrument, the pressure of the clip leaf spring 26 on the side of the support base 23 that holds the plate 24 on the side of the tread 21 is set to a constant value and cannot be adjusted. Therefore, the frictional force with the plate 24 is also constant, and the swinging load of the tread 21 cannot be freely adjusted according to the request of the performer, and it is impossible to always maintain the maximum operability during the performance. It was

Further, since the plate 24 is provided close to the fulcrum of the tread 21, the contact area at the time of wobbling of the tread changes to fluctuate the rocking load, and the guideability of the plate 24 is weak. If there is even a slight amount of play, there is a problem that the tread 21 swings laterally and the operation feeling is significantly impaired.

Further, the grease 30 interposed between the plate 24 and the clip leaf spring 26 is exhausted due to aging, and the swinging load of the tread 21 fluctuates, resulting in an unsmooth load application. There is also a problem that is likely to occur.

In order to prevent the generation of such frictional noise, in the specification of the above application, instead of the grease coating, friction plates having a uniform friction coefficient such as felt or leather are attached and fixed to both surfaces of the plate 21. Although a method of doing so is also shown, it has been impossible to prevent such a member from changing the frictional force with the clip leaf spring due to aging.

The present invention has been made in view of the above points, and the swinging load of the tread can be freely changed according to the request of the performer, and the operability of the tread during the performance can be kept good. It is an object of the present invention to provide a pedal device for an electronic musical instrument.

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, this invention has a tread plate pivotally attached to a support base, a held member projecting toward one of the tread plate and the support base toward the other, and The holding member provided on the other side so as to hold the held member, and the pressure adjusting means for varying the frictional force between the holding member and the held member are provided, and the held member is the tread plate. The invention provides a pedal device for an electronic musical instrument, which is formed in an arc shape with a large distance from the pivot axis.

[0010] Furthermore, a tread plate pivotally attached to the support base, a gripped member protruding toward one of the tread plate and the support base toward the other, and the gripped member A pedal of an electronic musical instrument provided with a holding member disposed on the other side so as to be held, and a self-lubricating resin or surface resin processed friction plate interposed between the holding member and the held member. Equipment is also provided.

[0011]

[Action]

 By configuring the pedal device of the electronic musical instrument according to the present invention as described above, the frictional force generated between the held member and the holding member when stepping on the tread can be changed by the pressure adjusting means, It is possible to set the optimum swing load of the tread for the performer at any time, improving the operability of the tread. Further, if the member to be held is formed in an arc shape with a large distance from the pivot of the tread, and the contact area with the tread is constant over the entire swing range of the tread, the tread load of the tread is unchanged. And the guideability of the member to be held is improved, so that even if some play occurs on the pivot, the sideways deviation of the tread does not occur. At the same time, since the load mechanism is located away from the fulcrum of rotation, it is possible to apply a sufficient load with a small tightening force, which is advantageous in terms of load adjustment and aging.

Further, in the case where a friction plate made of resin or surface resin is interposed between the held member and the held member, the load on the tread is smoothed, and the generation of friction noise is significantly reduced. The tread feel is also good.

[0013]

【Example】

 An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a rear view showing only an essential part of an embodiment of the present invention, and FIG. 2 is a side view showing the whole structure thereof.

As shown in FIG. 1 and FIG. 2, this pedal device is provided with a tread plate 1, a pivot shaft 2 hung from the tread plate 1, and a pivot shaft 2 laid between the tread plates 1 and 1a 'through a shaft mounting portion 3d. A support base 3 that pivotally mounts the tread 1 so that it can swing freely, a plate 4 that is a member to be held on the back surface of the tread 1, and an actuator 5 that is cut and raised from the tread 1 and an arrangement on the support 3 The holding member 6 of the plate 4 installed, the rotor revolving member 8 fixed to the rising portion 3a of the support base 3 and rotationally driven by the actuator 5 via the arm 7, and the stopper members 3b and 3c for restricting the swinging range of the tread 1. Etc. A non-woven fabric such as felt is attached to the upper surfaces of the stopper members 3b and 3c.

Here, the shaft structure of the pivot 2 will be described. After the shaft bolt 2a is sequentially inserted into the washer 2b, the shaft mounting portion 1a, and the cylindrical friction member 2c that is prevented from rotating, the metal cylindrical portion is inserted. While preparing the material 2d between the shaft mounting portions 3d and 3d and the friction member 2c 'between the shaft mounting portion 3d and the shaft mounting portion 1a, the shaft bolt 2a is arranged from the left to the shaft mounting portion 3d, the cylinder. The member 2d, the shaft mounting portion 3d ', the friction member 2c', and the shaft mounting portion 1a 'are inserted in this order, and the right end of the bolt 2a is tightened with the nut 2e via the washer 2b'.

The plate 4 is screwed so as to hang down from the back surface of the tread 1, and is formed in an arc shape having an arc hole 4 a centered on the pivot 2 at a position largely separated from the pivot 2. As shown in FIG. 1, the holding member 6 which holds the plate 4 is provided on the support base 3 on the opposing surfaces of the dogleg-shaped leaf springs 6a and 6b whose bases are fixed by set screws 9 and 9, respectively. Polytetrafluoroethylene resin PTFE containing low surface energy, non-adhesive and excellent in self-lubricating property, such as tetrafluoroethylene / hexafluoroethylene copolymer FEP and ethylene tetrafluoride ethylene copolymer ETFE. Alternatively, the rubbing plates 10a and 10b, which are obtained by processing the surface of the resin, are attached respectively. The friction members 2c and 2c 'of the pivot 2 are also treated with the same surface resin as the friction plates 10a and 10b.

Further, a bolt 11 is fitted through the through holes (not shown) provided in the leaf springs 6a and 6b, the friction plates 10a and 10b, and the arcuate hole 4a of the tread plate side plate 4, respectively. While the nut 12 is screwed, the coil spring 13 is engaged between the nut 12 and the leaf spring 6b, and the nut 12 is rotated to adjust the urging force of the coil spring 13 so that the friction plate 10a, A frictional force with the plate 4 held between 10b is changed, and the bolt 11, the nut 12, and the coil spring 13 constitute a pressure adjusting means.

This embodiment is configured as described above, and when the tread 1 is stepped on with the toes from the state shown in FIG. 2, the tread 1 swings counterclockwise about the pivot 2. At this time, the frictional force between the plate 4 and the friction plates 10a and 10b holding the plate 4 exerts an appropriate rocking load on the tread 1.

At the same time, the counterclockwise swing of the tread 1 causes the actuator 5 to rotate the arm 7 in the clockwise direction, the resistance value of the rotary volume 8 integrated with the arm 7 changes, and the musical output is stepped on the tread 1. It is controlled according to the angle. Then, when the tread plate 1 comes into contact with the stopper member 3b of the support base 3, its swinging is stopped, and even when the foot is separated from the tread plate 1, the tread plate 1 is not moved by the frictional force between the plate 4 and the friction plates 10a and 10b. Held in a state.

On the contrary, when the tread 1 is stepped on by the heel of the foot in this state, the tread 1 swings clockwise, the actuator 5 releases the pressing of the arm 7, and the rotary volume 8 follows this and counteracts. When it returns to the clockwise direction and the tread 1 comes into contact with the stopper member 3c of the support base 3, its swinging is stopped.

In this embodiment, since the polytetrafluoroethylene resin PTFE or its surface-treated member is used for the friction plates 10a and 10b which hold the plate 4 of the tread 1, the sliding property, the self-lubricating property and the abrasion resistance are obtained. In addition, all the characteristics such as weather resistance are significantly superior to those of felt, leather, etc. used in conventional pedal devices, and it is possible to smooth the swinging load on the tread plate over a long period of time. Therefore, it becomes possible to substantially eliminate the fricative noise.

Further, by simply rotating the nut 12, the biasing force of the coil spring 13 is changed to adjust the frictional force between the plate 4 and the friction plates 10a and 10b, and according to the preference of the performer or the like. It is possible to arbitrarily change the swing load of the tread 1 within a predetermined range.

Further, since the plate 4 of the tread 1 is formed in an arcuate shape with the pivot 2 as the center at a position largely separated from the pivot 2, the holding member 6 covers the entire swing range of the tread 1. Even if the guide shaft is completely guided and some play is generated in the pivot shaft 2, the stability of the tread plate 1 during swinging can be ensured for a long time, and at the same time, the contact area between the plate 4 and the holding member 6 does not change. Therefore, the rocking load of the tread 1 is also equalized. At the same time, since the load mechanism is located away from the fulcrum of rotation, it is possible to apply a sufficient load with a small tightening force, which is advantageous in terms of load adjustment and aging.

In the above-described embodiment, the plate that is the held member is provided on the tread side, and the holding member is provided on the supporting base side. However, the holding member is provided on the tread plate side and the holding member is provided on the support base side. It is also possible. The friction plate may be provided on the held member side instead of the held member side, and the pressure adjusting means is not limited to the combination of the bolt nut and the coil spring.

[0025]

[Effect of the device]

 As described above, the pedal device of the electronic musical instrument according to the present invention is the pressure adjusting means for varying the frictional force between the held member provided on one of the tread and the support and the holding member provided on the other. By providing the above, the operability of the tread can be improved by allowing the player to freely change the swinging load of the tread within a predetermined range as necessary.

Further, since the held member is formed in an arc shape centered on the pivot so as to be largely separated from the pivot of the tread, the rocking load of the tread is equalized over the entire swing range of the tread. The stability is improved and the reliability of the pedal system is significantly increased.

Further, a friction plate of self-lubricating resin or surface resin processing is interposed between the held member and the held member, so that the swinging load on the tread is smoothly maintained for a long period of time. In addition, it is possible to prevent friction noise during sliding and improve the feeling of operation of the tread.

[Brief description of drawings]

FIG. 1 is a rear view showing only a main part of an embodiment of the present invention.

FIG. 2 is a side view showing the overall structure of the same.

FIG. 3 is a cross-sectional view illustrating a conventional pedal device of an electronic musical instrument.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tread plate, 2 ... Axis, 3 ... Support stand, 4 ... Plate (holding member), 5 ... Actuator, 6 ... Holding member, 7 ... Arm, 8 ... Rotary volume, 9 ... Set screw, 10 ... Friction plate, 11 ... Bolt, 12 ... Nut, 13 ... Coil spring

Claims (2)

[Scope of utility model registration request] 1. A tread plate pivotably attached to a support base,
One of the tread plate and the support base is provided with a held member projecting toward the other, a holding member arranged on the other side so as to hold the held member, the holding member and the held member. Pressure holding means for varying the frictional force with the holding member is provided, and the held member is formed in an arc shape with a large distance from the pivot of the tread plate and the center of the pivot. Electronic musical instrument pedal device. 2. A tread plate pivotably attached to a support base,
One of the tread plate and the support base is provided with a held member projecting toward the other, a holding member arranged on the other side so as to hold the held member, the holding member and the held member. A pedal device for an electronic musical instrument, comprising: a self-lubricating resin or a surface-resin-processed friction plate interposed between a holding member.