JP3231972B2 - Electronic musical instrument switch device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch device for an electronic musical instrument, and more particularly to a key-top type switch device which is used to detect operation information of an electronic percussion instrument by being pressed by a player's finger or the like. It is.

[0002]

2. Description of the Related Art As a conventional switch device of this type, for example, a switch device disclosed in Japanese Utility Model Laid-Open No. 2-92622 is known. This switch device, as shown in FIG.
A substrate 52 on which first and second fixed contacts 51a and 51b are formed, and a switch body 53 made of rubber or the like attached to the substrate 52 are provided. The switch body 53 is connected to a solid pressed portion 54, a thin flexible portion 55 around the lower end of the pressed portion 54, and the flexible portion 55,
2 and is integrally formed with a base 56 attached to the base 2. The lower surface of the pressed portion 54 includes first and second
So as to face the fixed contacts 51a and 51b, respectively.
First and second movable contacts 57a and 57b are formed. Further, the lower surface of the pressed portion 54 is inclined,
D between the fixed contact 51a and the first movable contact 57a
1, the second fixed contact 51 b and the second movable contact 57
The distance d2 between b is larger.

In this switch device, a switch body 53 is provided.
When the pressed portion 54 is pressed, the flexible portion 55 bends and the pressed portion 54 sinks, so that the first movable contact 57a first contacts the first fixed contact 51a and short-circuits it. And then the second movable contact 57b
Contacts the second fixed contact 51b and is turned on by short-circuiting the second fixed contact 51b. Then, the velocity is determined from the timing interval of the ON operation of the first and second movable contacts 57a, 57b, and based on the result, for example, the sound of an electronic percussion instrument is controlled, and the velocity is determined according to the touch intensity. I am going to pronounce.

[0004]

However, the conventional switch device described above requires a large pressing force to operate the switch body 53, and the touch becomes very heavy.
There is a disadvantage that a smooth switching operation cannot be performed.
That is, in this switch device, the first movable contact 57
a until the first fixed contact 51a is short-circuited.
5 can flex freely, so that it can be operated with a relatively small pressing force. However, thereafter, the first movable contact 57a
Of the flexible portion 55 by the contact of the first movable contact 57a because the pressed portion 54 is solid and is not easily deformed itself. Deflection is hindered. Therefore, the first
After the short-circuit of the movable contact 57a, the pressed portion 54 or the first portion that is not easily deformed until the second movable contact 57b is short-circuited.
The movable contact 57a and the fixed contact 51a must be forcibly deformed. As a result, the switch body 5
3 requires a large pressing force to operate, and the above-mentioned drawbacks occur.

For the same reason, the first movable contact 57
After the short-circuit of a, when the pressed portion 54 is forcibly pressed and turned to short-circuit the second movable contact 57b, the first movable contact 57a integrated with the pressed portion 54 also rotates together. When the angle of the contact surface changes, the contact resistance changes. Therefore, the switching operation becomes unstable,
The operation timing is likely to be shifted, which adversely affects the sound of the electronic musical instrument.

In order to avoid such a drawback,
For example, it is conceivable to reduce the difference d2-d1 between the first and second contacts to make it easier to short-circuit the second movable contact 57b. In this case, the two movable contacts 57a,
When the time difference between the ON operations of the 57b becomes very short, a velocity detection error easily occurs, and accurate sound control of the electronic musical instrument cannot be expected.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it is an object of the present invention to provide a switch device for an electronic musical instrument which can improve a touch feeling and stabilize a switching operation extremely. The purpose is.

[0008]

In order to achieve the above object, the present invention provides a substrate on which a plurality of pairs of fixed contacts are provided side by side;
An elastic switch body attached to the substrate and operable to be pressed, and the switch body includes a plurality of movable contacts formed so as to face a plurality of pairs of fixed contacts, respectively. A switch device of an electronic musical instrument configured to sequentially short-circuit a plurality of pairs of fixed contacts in accordance with a pressing operation of a switch body, wherein the switch body includes a pressed portion to be pressed and a pressed portion to be pressed . Adjacent to the outside and convex toward multiple fixed contacts
A made hollow dome portion integrally one you short first at least a fixed contact of the plurality of movable contacts but is characterized by being formed on top of the dome portion.

In this case, it is preferable that the pressed portion is formed solid.

In these cases, the switch body has a rotation fulcrum on the outside of the dome portion to be in contact with the substrate, and is configured to rotate around the rotation fulcrum by the pressing of the pressed portion. Is preferred.

Further, in these cases, it is preferable to further include a panel arranged so as to cover the dome portion.

[0012]

According to the switch device of the electronic musical instrument, when the pressed portion of the switch body is pressed with a finger or the like, the switch body is compressed and deformed, and first, the top of the dome portion adjacent to the outside of the pressed portion. The movable contact formed in
Contact and short circuit a corresponding fixed contact formed on the substrate. Next, the hollow dome is deformed .
As a result , the portion including the pressed portion of the switch body sinks, and another movable contact comes into contact with the corresponding fixed contact to short-circuit it.

As described above, in the switch device of the present invention,
After the first movable contact is short-circuited, by the hollow dome portion attached with this is easily deformed, because the other of the movable contact are short-circuited, smoothly can operate the switch body with a small pressing force, therefore, good Touch feeling is obtained. Further, since the dome portion is easily deformed, the angle of the contact surface of the first movable contact is stabilized without tilting after the contact, so that the switching operation is stabilized and the shift of the operation timing is reduced. Also, ease the deformation of such a switch body
From this , it is also possible to set a larger stroke difference between the movable contacts, and thus a timing interval of the short circuit,
As a result, it is possible to improve the velocity detection accuracy and perform good tone control that more accurately reflects the touch response.

Further, in the switch device according to the second aspect, since the pressed portion to be pressed is formed as a solid portion, a better touch feeling with an appropriate mass feeling can be obtained. In the switch device of the present invention, as described above, the switching operation is performed by deformation of the dome portion, and the pressed portion does not directly participate in the switching operation. Has no effect on the feeling.

In the switch device according to the third aspect, since the panel covers and covers the dome portion, its appearance is kept good.

According to a fourth aspect of the present invention, the switch body first rotates around a rotation fulcrum that comes into contact with the substrate outside the dome portion in response to the pressing, and thereafter,
Since the movable contacts are sequentially short-circuited as described above, the switching operation is further stabilized.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a switch device according to a first embodiment of the present invention. This switch device 1
This is a key-top type switch device applied to an electronic percussion instrument and detecting operation information when the finger is pressed with the finger. As shown in FIG. 1, the switch device 1 covers a printed circuit board (board) 2, a plurality of switch bodies 3 (only one is shown) attached to the printed circuit board 2, and a part of the switch body 3. And a panel 4 attached to a printed circuit board 2.

On the surface of the printed circuit board 2, first and second fixed contacts 5a, 5b are juxtaposed in the front-rear direction. The fixed contacts 5a, 5b are formed by carbon printing or the like, and each of them is constituted by a pair of contacts spaced apart from each other, not shown. Both fixed contacts 5a, 5b are connected to a sound control device (not shown).

Each switch body 3 is integrally formed of, for example, silicone rubber. As shown in FIGS. 2 and 3, a short columnar solid pressed portion 6 and a stepped lower portion in front of the pressed portion 6 are provided. A continuous block portion 7, a dome portion 8 formed in the block portion 7 adjacent to the pressed portion 6, and a base portion 10 continuous around the pressed portion 6 and the block portion 7 via a thin curved portion 9. It is configured.

The dome portion 8 is a hollow member whose upper side is open, and has a first switch element portion 12 hanging down from the lower edges of the pressed portion 6 and the block portion 7 via the thin portion 11.
a. A first movable contact 13a made of carbon is formed on the lower surface of the first switch element 12a. In the center of the lower surface of the pressed portion 6, a second switch element portion 12b is formed in a protruding shape. The lower surface of the second switch element portion 12b forms a pair with the first movable contact 13a. A second movable contact 13b is formed. A rotation fulcrum 14 is formed at the front end of the block 7 so as to protrude downward so as to be flush with the base 10.

The switch body 3 thus configured is
As shown in FIG.
The panel 4 is attached to the printed circuit board 2 by fixing the panel 4 to the printed circuit board 2 with screws 16 in a state of being sandwiched between the panel 4 and the contact portion 15 of the panel 4.

In the assembled state of the switch device 1, the first and second movable contacts 13a and 13b face the first and second fixed contacts 5a and 5b, respectively, and the first movable contact and the fixed contact 13a, 5a is the distance between the second movable contact and the fixed contacts 13b, 5b.
The relationship is shorter than the distance D2 between them. The rotation fulcrum 14 is in contact with the printed circuit board 2. Further, while the block portion 7 and the dome portion 8 of the switch body 3 are covered with the panel 4, the pressed portion 6 slightly protrudes outward from a window 17 formed in the panel 4 so that the pressing operation can be performed from outside. Has become.

Next, the operation of the switch device 1 having the above configuration will be described. When the pressed portion 6 of the switch body 3 is pressed,
When the thin curved portion 9 bends, the pressed portion 6 sinks, and the switch body 3 as a whole rotates about the pivot 14. With this rotation, first, the first movable contact 13
a contacts the first fixed contact 5a of the printed circuit board 2 and short-circuits it, so that the first switch element 12a is turned on. Thereafter, the pressed portion 6 further sinks due to the bending of the thin portion 11 and the thin curved portion 9 of the dome portion 8, and accordingly, the second movable contact 13b contacts the second fixed contact 5b. , By shorting this, the second
Is turned on.

These ON signals are sequentially output to the sound control device, and the sound control device determines the presence or absence and the velocity of the pressing operation of the switch device 1 based on the presence or absence of the ON signal and the timing interval between the ON signals. Then, the pronunciation of the electronic percussion instrument is controlled based on the results of these determinations.

As described above, the switching device 1 of the present embodiment
Then, after the first movable contact 13a is short-circuited, the hollow dome portion 8 to which the first movable contact 13a is attached is easily deformed with the thin portion 11 as a relief, and the second movable contact 13b is short-circuited. The main body 3 can be smoothly operated with a small pressing force. As a result, a good touch feeling can be obtained, and the angle of the contact surface of the first movable contact 13a is stabilized without being inclined after the contact, so that the switching operation can be stabilized and the shift of the operation timing can be reduced. Thereby, good sound control can be performed. In addition, because of the ease with which the switch body 3 is easily deformed, it is possible to set the stroke difference between the two movable contacts 13a and 13b, and therefore, the operation timing interval to be larger, thereby increasing the velocity detection accuracy. , And good sound control that more accurately reflects the touch response can be performed.

In the switch device 1, the switch main body 3 first rotates about the rotation fulcrum 14 which comes into contact with the printed circuit board 2 in accordance with the pressing, and thereafter, the movable contacts 13a and 13b are moved. Since the short-circuit is sequentially performed, the switching operation can be further stabilized. Further, since the pressed portion 6 is formed solid, an appropriate mass feeling at the time of the touch operation can be secured as in the related art, and the dome portion 8 is covered and concealed by the panel 4, so that the external appearance can be improved. Can be kept.

FIGS. 4 and 5 show a switch body used in a switch device according to a second embodiment of the present invention.
This switch body 23 is the switch body 3 of the first embodiment.
In comparison with the first embodiment, a pair of hollow dome portions 28a and 28b are provided adjacent to the pressed portion 6, and the first and second dome portions 28a and 28b are
The only difference is that the movable contacts 13a and 13b are formed. The configuration of the dome portions 28a and 28b is the same as that of the dome portion 8 of the first embodiment. Therefore, in the present embodiment, the same effect as that of the first embodiment can be obtained, and in addition to this, both movable contacts 1 are provided.
3a and 13b are dome portions 28 that are easily deformed.
Since the switch body 23 is formed at the positions a and b, the switch body 23 is more easily deformed, and a lighter touch feeling can be obtained.

In the above-described switch device, two sets of fixed contacts and two sets of movable contacts are provided. However, three or more sets of these are provided so that velocity can be detected in multiple stages and more accurate touch response control can be performed. It may be. In this case, corresponding to the first embodiment, one of the movable contacts may be formed on the pressed portion and the other movable contact may be formed on the same number of dome portions, or may be formed on the second embodiment. Then, all the movable contacts may be formed on the dome portion.

In the embodiment, the switch device is described as being used for an electronic percussion instrument. However, it is needless to say that the present invention can be applied to other types of electronic musical instruments using a key-top switch. In addition, the detailed configuration such as the shape of the switch body can be appropriately changed without departing from the spirit of the present invention.

[0030]

As described in detail above, the switch device for an electronic musical instrument according to the present invention has the effects of improving the feeling of touch and making the switching operation extremely stable.

[Brief description of the drawings]

FIG. 1 is a sectional view of a switch device according to a first embodiment of the present invention.

FIG. 2 is a plan view of a switch body of the switch device of FIG. 1;

FIG. 3 is a sectional view of the switch body of FIG. 2;

FIG. 4 is a plan view of a switch body of a switch device according to a second embodiment of the present invention.

FIG. 5 is a sectional view of the switch body of FIG. 4;

FIG. 6 is a sectional view of a conventional switch device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Switch apparatus 2 Printed circuit board 3 Switch main body 4 Panel 5a 1st fixed contact 5b 2nd fixed contact 6 Pressed part 8 Dome part 12a 1st movable contact 12b 2nd movable contact 14 Rotating fulcrum 23 Switch main body 28a Dome 28b Dome

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01H 13/64 G10H 1/053 G10H 1/34 H01H 13/14 H01H 13/52

Claims (4)

(57) [Claims] A substrate on which a plurality of pairs of fixed contacts are arranged in parallel;
An elastic switch body attached to the substrate and operable to be pressed; and a plurality of movable contacts formed on the switch body so as to face the plurality of pairs of fixed contacts, respectively. Is a switch device of an electronic musical instrument configured to sequentially short-circuit the plurality of pairs of fixed contacts in accordance with the pressing operation of the switch body, wherein the switch body is a pressed portion to be pressed, together adjacent to the outside of the pressed portions, the plurality of stationary contact
Integrally includes a hollow dome portion formed in a convex shape toward the point side, at least the one of the plurality of movable contacts
Switching apparatus for an electronic musical instrument which initially one you short the fixed contact, characterized in that it is formed on top of the dome portion. 2. The switch device for an electronic musical instrument according to claim 1, wherein the pressed portion is formed solid. 3. The switch device for an electronic musical instrument according to claim 1, further comprising a panel arranged to cover said dome portion. 4. The switch body has a rotation fulcrum outside of the dome portion, the rotation fulcrum being in contact with the substrate, and is configured to rotate around the rotation fulcrum by the pressing of the pressed portion. 4. The method according to claim 1, wherein
A switch device for an electronic musical instrument according to any one of the above.