JPH0534624U - Electronic musical instrument footswitch - Google Patents

Abstract

(57) [Abstract] [Purpose] Protects the switch and its board, and prevents operation delay and chattering when the switch is turned on. [Structure] A return spring 14 is provided between the stepping member 1 and the outer frame 11.
The movable shaft 3 is slidably mounted on the outer frame 11 so that the movable shaft 3 and the stepping member 1 are integrated. A cover member 6 in which a cylindrical spring holder 8 is slidably mounted is fixedly mounted on a flange portion 3a of the movable shaft 3, and the spring holder 8 and the movable shaft 3 are fixed.
A board 18 on which a switch spring 17 is mounted on the outer frame 11 via a board mounting member 15 by engaging a buffer spring 9 between the outer frame 11 and the inner peripheral surface of the cover member 6 in a slidable manner. To be fixed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a foot switch for electronic musical instruments such as electronic organs, electronic pipe organs, and electronic pianos.

[0002]

[Prior Art]

 The foot switch of an electronic musical instrument is used for automatic rhythm, sustain on / off, effect sound switching, etc., and can be operated by stepping on it with your foot.

Conventionally, as a foot switch of this type, for example, a switch disclosed in Japanese Utility Model Publication No. 47-26278 is known. As shown in FIG. 3, the movable shaft 23 integrated with the stepping member 21 by the foot presses the switch head 37a through the coil spring 29 for driving the switch to turn on the normally open switch 37, thereby stepping on the switch. By releasing the member 21, the stepping member 21 is returned by the urging force of the coil spring 34 for pushing up and the switch 37 is turned off, so that the force of the foot does not directly act on the switch 37 and the damage of the switch is prevented. Is what you are trying to do.

[0004]

[Problems to be solved by the device]

 However, in such a conventional foot switch for an electronic musical instrument, only the both ends of the coil spring 29 for driving the switch are supported, the middle portion is unstable, and the depression force is reduced. Therefore, the rigidity of the coil spring 29 cannot be made high. Therefore, when the stepping portion 21 is pushed suddenly, the coil spring 29 is buckled, and it is difficult for the force to be applied vertically to the switch 37, resulting in operation delay and chattering. There was a fear of.

Further, since it is necessary to integrally incorporate the switch 37 into the pressing mechanism portion of the foot switch, there are restrictions on the shape and size of the switch, and the assembling workability is poor and the production cost rises. There was also a problem.

The present invention has been made in view of the above points, and provides a foot switch for an electronic musical instrument that does not cause operation delay or chattering and can effectively protect the switch and its substrate. With the goal.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has a stepping member operated by a foot, a movable shaft integrally fixed to the stepping member, an outer frame on which the movable shaft is slidably mounted, and A return spring engaged between the frame and the stepping member, a cover member on which a spring holder fixed to the movable shaft is slidably mounted, and an engagement between the spring holder and the movable shaft. A buffer spring, a board fixedly mounted on the outer frame, and a switch mounted on the board, and the stepping member, the movable shaft, the spring holder, and the switch are located on substantially the same axis. It provides a foot switch for electronic musical instruments.

[0008]

[Action]

 The electronic musical instrument foot switch according to the present invention is configured as described above, so that when the stepping member and the movable shaft integrated therewith are pressed against the biasing force of the return spring, the spring holder turns on the switch via the buffer spring. Even when the stepping member is further stepped on, the buffer spring is deformed to protect the switch and its substrate.

At this time, since the outer peripheral portion of the cushioning member is in sliding contact with the inner peripheral surface of the spring holder and the outer peripheral surface of the spring holder is guided by the inner peripheral surface of the cover member, the cushioning member is pressed against the spring. Does not bend or buckle. Moreover, since the stepping member, the movable shaft, the spring holder and the switch are located on substantially the same axis, it is possible to apply a force perpendicularly to the switch and prevent operation delay and chattering.

[0010]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the present invention.

A movable shaft 3 is integrally fixed to a central shaft 1a of a stepping member 1 operated by a foot by a set screw 4 via a cushion member 2 such as rubber, and a stroke adjustment is performed on an upper surface of a flange portion 3a of the movable shaft 3. The cushion member 5, which also serves as the above, is fitted and mounted, and the cover member 6 is fixed to the lower surface of the flange portion 3a by the set screws 7 and 7. A cylindrical portion 6a is projectingly provided at the center of the cover member 6, and a cylindrical spring holder 8 having one end closed is mounted on the inner peripheral portion of the cylindrical portion 6a so as to be slidable in the axial direction. 8a is used to prevent the spring holder 8 from coming off, and a buffer spring 9 is engaged between the spring holder 8 and the movable shaft flange portion 3a so that the outer peripheral portion of the buffer spring 9 slides on the inner peripheral surface of the spring holder 8. It should be noted that the cylindrical spring holder need only be cylindrical, and need not be cylindrical. Then, the central shaft 1a of the step portion 1, the movable shaft 3, and the spring holder 8 are arranged on the same axis.

On the other hand, the outer frame 11 is fixed to the foot switch mounting plate 10 of the electronic musical instrument by the set screws 12 and 12, and the cushion member 13 is attached to the upper portion of the cylindrical portion 11a of the outer frame 11. The movable shaft 3 is axially slidably mounted in a shaft hole 11b provided in the central portion of the outer frame 11, and the flange portion 3a thereof is inserted into the through hole 10a of the foot switch mounting plate 10. A return spring 14 is fitted between the stepping member 11 and the stepping member 1 to urge the stepping member 1 and the movable shaft 3 integrated with the stepping member 1 upward in the drawing.

Further, a board mounting member 15 having a substantially L-shaped cross section is fixed to the lower surface of the outer frame 11 with a set screw 16, and a board 18 on which a switch 17 is mounted is fixed to the board mounting member 15. , The switch 17 is positioned on the same axis as the spring holder 8.

When the foot switch device is assembled, the movable shaft 3 is inserted into the shaft hole 11b of the outer frame 11, and then the return spring 14 is attached between the movable shaft 3 and the stepping member 1. In this state, both are integrally fixed by the set screw 4.

Next, the spring holder 8 is slidably attached to the cover member 6, the impact spring 9 is housed in the spring holder 8, and the cover member 6 is attached to the movable shaft flange portion 3a by the set screws 7 and 7. After being fixed to the lower surface, the board mounting member 15 to which the board 18 on which the switch 17 is mounted is mounted is fixed to the lower surface of the outer frame 11 with the set screw 16. The outer frame 11 of the foot switch device assembled in this manner is fixed to the foot switch mounting plate 10 from above by means of set screws 12 and 12, and the assembly to an electronic musical instrument (not shown) is completed.

This embodiment is configured as described above, and when the stepping member 1 is stepped down with a foot in the figure, the spring holder 8 moves downward via the cushion member 2, the movable shaft 3, and the buffer spring 9. Then, the switch 17 is pressed to turn on the switch 17. After that, even if the stepping member 1 further descends and the cover member 6 descends via the movable shaft 3, the buffer spring 9 is elastically deformed and the downward pressing force of the spring holder 8 is alleviated, and the switch 17 and Unreasonable force does not act on the substrate 18.

At this time, since the buffer spring 9 has a relatively low rigidity, it tends to be deformed by a strong pressing force in a direction perpendicular to the pressing direction. However, the buffer spring 9 has almost the entire outer peripheral portion except its uppermost portion. Since the spring holder 8 is guided over the entire length and the outer peripheral portion of the spring holder 8 is guided by the cover member cylindrical portion 6a integral with the movable shaft 3, the buffer spring 9 bends or buckles. The vertical force can always be applied to the switch 17 without causing any delay, and there is no risk of operation delay or chattering. Further, since the switch 17 is separated from the switch pressing portion, the shape, size, etc. can be freely selected.

Since the cushion member 2 is inserted between the stepping member 1 and the movable shaft 3, the reaction force and play distance received by the foot when the stepping is stopped can be freely adjusted by exchanging the cushion member 2. It becomes possible to do. Further, the cushion member 2 can be omitted by accurately forming the movable shaft 3 and the stepping member 1.

In the above embodiment, the stroke adjustment until the switch 17 is turned on may be performed by changing the thickness of the cushion member 5 on the upper surface of the movable shaft flange portion 3a, or in FIG. As shown, a flat cylindrical spacer 19 may be screwed onto the lower surface protrusion 11c of the outer frame 11, and the spacer 19 may be rotated to change the height of the protrusion 11c.

Further, the force for pressing the switch 17 is freely adjusted by changing the distance from the spring holder 8 to the switch 17 and changing the spring constant, natural length, etc. of the buffer spring 9 by each of the methods described above. be able to. Furthermore, if the thickness of the flange portion 3a is increased and the vicinity of the insertion hole of the set screw 4 at the bottom is dug, and the buffer spring 9 is inserted into this dug portion, the cover member 6 will be The cylindrical portion 6a can be eliminated. The board 18 is fixed to the outer frame 11 via the board mounting member 15. However, the board is a dividable board with jumper wires, and the jumper wire portion of the board is L-shaped or U-shaped. The board 18 may be directly attached by bending the open end outwardly into a U-shape or a vertical Z-shape with vertical diagonal portions and attaching the bent horizontal portion to the outer frame 11. It is possible.

[0021]

[Effect of the device]

 As described above, in the foot switch of the electronic musical instrument according to the present invention, the outer peripheral portion of the buffer spring, which alleviates the pressing force of the stepping member, is brought into sliding contact with the inner peripheral surface of the spring holder, so that the buffer spring is pressed. There is no risk of bending or buckling, and since the stepping member, the movable shaft, the spring holder and the switch are almost on the same axis, it is possible to always apply a force perpendicular to the switch. It is possible to prevent the delay when turning on and the occurrence of chattering.

Further, since the switch can be provided separately from the switch pressing portion, the shape and size of the switch can be freely selected, and the assembling property of the switch pressing portion is improved. The foot switch device can be supplied at low cost.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part showing another example of the stroke adjusting mechanism of the stepping member.

FIG. 3 is a cross-sectional view illustrating a foot switch of a conventional electronic musical instrument.

[Explanation of symbols]

1 ... Stepping member, 2, 5, 13 ... Cushion member, 3 ... Movable shaft, 4, 7, 12, 16 ... Set screw, 6 ... Cover member,
8 ... Spring holder, 9 ... Buffer spring, 10 ... Foot switch mounting plate, 11 ... Outer frame, 14 ... Return spring, 15 ... Board mounting member, 17 ... Switch, 18 ... Board, 19 ... Spacer

Claims (1)

[Scope of utility model registration request] 1. A stepping member operated by a foot, a movable shaft integrally fixed to the stepping member, an outer frame on which the movable shaft is slidably mounted, and the outer frame and the stepping member. A return spring attached between the springs, a cover member slidably mounted on a spring holder fixed to the movable shaft, a buffer spring attached between the spring holder and the movable shaft, It is characterized in that it comprises a board fixedly mounted on the frame and a switch mounted on the board, and the stepping member, the movable shaft, the spring holder and the switch are located on substantially the same axis. Electronic musical instrument foot switch.