JPS595904Y2 - Knee-lever switch operation device for electronic musical instruments - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a twenty-one lever switch operating device for an electronic musical instrument.

In electronic musical instruments, in order to be able to obtain a sustain effect at will without using the hands while playing, an operating lever called a 21 lever is provided at a location corresponding to the performer's right knee. When the player pushes this lever in a predetermined direction with his right knee, the sustain effect switch is turned on and a sustain effect is obtained.

As such a switch operating device, one having a structure as shown in FIGS. 1 to 3 is known as an example.

That is, the tip of the lever 3, which is rotatably attached to the bottom surface of the shelf board 1 of the electronic musical instrument via the mounting brackets 2, 2, and which normally hangs below the shelf board 1 during performance, is Resisting the force of the spring 5 provided between the portion 3a and the spring support member 4 provided on the upper surface of the shelf board 1,
When pushed in the direction of arrow A until a part of the stopper member 6 comes into contact with one of the stopper members 6 provided on the lower surface of the shelf board 1, the lever 3 attaches to the switch support member 7 provided on the upper surface of the shelf board 1. The switched switch 8 is turned on and a sustain effect is obtained.

When the pressing operation on the knee lever 3 is stopped from this state, the knee lever 3 returns to its original hanging position by the force of the spring 5, and accordingly, the switch 8 is switched to return to its original OFF state. There is.

In addition, if you want to obtain a sustain effect continuously for a certain period of time during a performance, move the second lever 3 in the hanging state in the direction of arrow B so that a part of it is connected to the other stopper member provided on the lower surface of the shelf board 1. When the knee lever 3 is pushed down until it comes into contact with the knee lever 9, the knee lever 3 is held in that position by the action of the spring 5, and the switch 8 is switched by the knee lever 3 and held in the on state.

Incidentally, this state is also a state in which the twenty-one lever 3 is stored under the shelf board 1 when not in use.

However, such a conventional switch operating device near includes the mounting brackets 2, 2 of the knee lever 3, the spring support member 4, the switch support member 7, and the stopper members 6, 9.
Since each part is individually attached to the shelf board 1, there are a large number of parts, and it is extremely difficult and time-consuming to assemble each part in the designed positional relationship, which ultimately increases costs. There was a drawback to that.

This idea was devised in view of the above circumstances; it has a small number of parts, each part can be easily and reliably assembled in the designed positional relationship, and the impact force associated with the operation of the lever can be absorbed by the stopper. A 21-lever switch operating device for an electronic musical instrument, which can be distributed over the shelf board through the stopper part to avoid damage to the device itself, and in which the mounting position on the shelf board can be determined by the stopper part. The object is to provide a twenty-one lever unit in which each part is provided in one casing to form a unit, and a stopper part for regulating the rotation range of the two levers is shaped into a shelf board. It is designed to be installed in contact with the wall of the storage hole.

An embodiment of this invention will be described below with reference to FIGS. 4 to 6.

In the figure, reference numeral 11 denotes a shelf board for an electronic musical instrument, and a rectangular twenty-one lever unit storage hole 12 is formed at a predetermined position of the shelf board.
Further, a casing 13 is attached to the lower surface thereof as will be described later.

The casing 13 is made of plastic or resin, and has circular holes 14 formed at a plurality of predetermined locations, and has a substantially U-shaped cross section at two predetermined locations. grooves 15 and 15 are formed respectively.

Stopper support members 16a to 16C made of resin are adhered to predetermined locations on the upper surface of the casing 13, and one stopper member 17 is attached to each of the stopper support members 16a to 16C with screws 18...・It is installed by.

This one stopper member 17 has an engaging surface 19 that is a vertical surface on the left side in FIGS. 4 and 5, and a stopper surface 20 that is inclined at a predetermined angle on the right side thereof.
and a pair of projecting pieces 21. which further extend in parallel toward the right. 21.

A buffer member 22 is bonded to the stopper surface 20 of this one stopper member 17.

Further, the other stopper member 23 made of synthetic resin is adhered to a predetermined location on the upper surface of the casing 13, and a gradual transition member 24 is adhered to the upper surface of this stopper member 23.

The grooves 15, 15 of the casing 13 are provided with a knee lever 2.
A rotating shaft 26, which is a part of the stopper member 17, is connected to both protruding pieces 21.5 of the one stopper member 17. It is rotatably fitted in contact with the lower surface of 21.

A round bar 27 is welded to a predetermined location of this rotating shaft 26 and planted so as to be perpendicular to the rotary shaft 26.
are both protruding pieces 21, 21 of the one stopper member 17.
supported between them.

That is, the rotation shaft 26 of the knee lever 25 is connected to the groove 15 of the casing 13. 15 to prevent movement in the left-right direction, and the grooves 15 of the casing 13 and the protruding piece 21 of one stopper member 17. 21 to prevent vertical movement, and the round bar 27 is held between both protruding pieces 21 and 21 of one stopper member 17, thereby preventing movement in the front-back direction. It is rotatably attached to the casing 13.

A resin spring support member 2B is bonded to a predetermined location on the upper surface of the casing 13.

The spring support member 28 has a substantially inverted U-shaped cross section, and a groove 29 having a substantially T-shaped cross section is formed on the lower surface of its upper wall and extends in the left-right direction.

In this groove 29, a spring locking member 30 having a substantially inverted Ω-shaped cross section is provided.
are slidably fitted and fixed to the earthen wall of the spring support member 28 by screws 31.

A spring 3 is provided in the groove 32 of this spring locking member 30.
One hook 33a of the spring 33 is locked, and the other hook 33b of the spring 33 is locked in a groove 34 formed at the tip of the round bar 27.

Note that the spring support member 2 of the spring locking member 30
8, when the knee lever 25 hangs straight down below the shelf board 11 as shown by the solid line in FIGS. 5 and 6, the spring 33 is approximately horizontal and the round bar 27 This position is such that it does not act on the lever 25 at all.

A switch support member 35 made of synthetic resin is adhered to a predetermined location on the upper surface of the casing 13.

A switch 36 for obtaining a sustain effect, for example, is attached to the switch support member 35 with a screw 37.

This switch 36 has a movable contact piece 40 between a pair of fixed contact pieces 3B and 39, and an actuator 41 is fixed to the lower surface of the tip of the movable contact piece 40. There is.

A cam 4 having a shape as shown in FIG.
2 is fitted.

When the knee lever 25 is in a position hanging straight below the shelf towel 11 as shown by the solid line in FIGS. 5 and 6, the movable contact piece 40 has its actuator 41 pushed up by the cam 42. The switch 36 is in the OFF state, and when the second lever 25 is rotated in the direction of arrow C or D from this state as will be described later, the cam is turned off. 42 is released, the movable contact piece 40 separates from the upper fixed contact piece 38 and comes into contact with the lower fixed contact piece 39, and accordingly, the switch 36 is switched to the on state. Next, a case will be described in which the unitized switch operating device as described above is attached to the shelf board 11.

In this case, the one stopper member 17 is inserted from below into the hole 12 of each component shelf board 11 provided on the upper surface side, and the engaging surface 19 of one stopper member 17 is inserted into the corresponding wall surface 12a of the hole 12 of the shelf board 11. At the same time, the mounting surface of the casing 13 is brought into contact with the lower surface of the shelf board 11, and then a screw without a screw is inserted into the circular hole 14 of the casing 13 and screwed into the shelf board 11, thereby completing the above-mentioned process. The unitized switch operating device as described above is attached to the shelf board 11.

Next, the operation of the switch operating device having the above structure will be explained.

Assume that the knee lever 25 is now in a position where it hangs straight down below the shelf board 11, as shown by the solid line in FIGS. 5 and 6.

If you want to temporarily obtain a sustain effect during a performance, move the lever 25 in the direction of arrow C against the force of the spring 33 so that the lever 21 is attached to the stopper surface 20 of one stopper member 17. When the movable contact piece 40 is rotated until it comes into contact with the buffer member 22, that is, to the position shown by the dashed line in FIGS. The switch 36 comes into contact with the fixed contact piece 39 on the side, thereby turning on the switch 36 and producing a sustain effect.

On the other hand, when the rotation operation of the knee lever 25 is stopped from this state, the knee lever 25 is rotated in the direction of arrow D by the force of the spring 33 and returns to the original state shown by the solid line in FIGS. 5 and 6. Along with this, the force arm 42 pushes up the actuator 41 and brings the movable contact piece 40 into contact with the upper fixed contact piece 38, thereby turning off the switch 36.

As described above, when the lever 25 is rotated in the direction of the arrow C and the round bar 27 is brought into contact with the buffer member 22 bonded to the stopper surface 20 of one stopper member 17, the impact force is However, this impact force is somewhat alleviated by the buffer member 22, and after being applied to the stopper member 17 itself, it is applied to the engaging surface 19 of the stopper member 17 (i.e., the stopper surface 20 against which the round bar 27 comes into contact). ) is in contact with the shelf board 11 through the wall surface of the hole 12 of the shelf board 11, and the casing 13 etc. are destroyed by the impact force accompanying the operation of the second lever 25. It will not be done.

Next, if you want to obtain a sustain effect continuously for a certain period of time during performance, move the knee lever 25 in the direction of arrow D against the force of the spring 33 so that the round bar 27 moves toward the other stopper member 2.
When the cam 42 is rotated until it comes into contact with the buffer member 24 bonded to the upper surface of the movable contact 3, that is, to the position shown by the two-dot chain line in FIGS. The piece 40 contacts the lower fixed contact piece 39,
This turns on the switch 36 and provides a sustain effect.

In this state, even if the rotation operation of the twenty-one lever 25 is stopped, the twenty-one lever 25 is held at the position by the action of the spring 33.

Next, if you want to release this state, press the lever 25.
When the knee lever 25 is rotated in the direction of arrow C, the knee lever 25 is returned to its original position shown by the solid line in FIGS. 5 and 6 by the action of the spring 33.

The state shown by the two-dot chain line in FIGS. 5 and 6 is also a state in which the lever 25 is stored under the shelf board 11 when not in use.

Rarely, in the above embodiment, the stopper support member 163
~16 C, stopper member 23, spring support member 2
8, the switch support member 35, and the like are glued to predetermined locations of the casing 13, but they may all be formed into one piece using resin, and the present invention is not limited to the above embodiment. .

As explained in detail above, according to the two-lever switch operation device for an electronic musical instrument according to this invention, each component is provided in one casing to form a unit, so the number of components is small, and each It is possible to easily and reliably assemble the parts in the designed positional relationship, which in turn can reasonably reduce costs, and the stopper part for regulating the rotation range of the lever can be replaced with a shelf board. Since the structure is built in such a way that it comes into contact with the wall of the 21-lever unit storage hole, the impact force caused by operating the 21-lever can be dispersed to the shelf board through the stopper part. Therefore, the device itself will not be destroyed by the impact force, and the stopper portion can be used to position the device to be attached to the shelf, making the installation process easier.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an example of a 21-lever switch operation device in a conventional electronic musical instrument, and FIG.
- Longitudinal cross-sectional view along line II, Figure 3 is If-I in Figure 1
FIG. 4 is a plan view showing an embodiment of the two-lever switch operating device for an electronic musical instrument according to this invention, and FIG. 5 is a partially omitted longitudinal sectional view taken along line II. FIG. 6 is a partially omitted vertical cross-sectional view taken along line VI-VI in FIG. 4. 11... Shelf board, 12... Hole, 12 a
...Wall surface, 13 ...Casing, 16
a...16C...Stopper support member, 17.
...Stopper member, 19...Engagement surface, 2
0... Stopper surface, 23... Stopper member, 25... Knee lever, 26...
Rotating shaft, 27...Round bar, 28...Spring support member, 33...Spring, 35...
...Switch support member, 36...Switch.

Claims (1)

[Scope of utility model registration request] For rotatably supporting the knee lever in a 21-lever switch operation device for an electronic musical instrument in which the switch is changed by pushing the knee lever in a predetermined direction against the force of a return spring. a support part for supporting the spring, a support part for supporting the switch, and a stopper part for regulating the rotation range of the twenty-one lever, and the stopper part The surface opposite to the stopper surface on which the twenty-one lever comes into contact is brought into contact with the wall surface of the twenty-one lever unit storage hole formed in the shelf board,
A twenty-one lever switch operating device for an electronic musical instrument, characterized in that the casing is attached to the shelf board.