JP2737912B2 - Switch structure of electronic wind instrument - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch structure operated by keys, valves, and the like of an electronic wind instrument, and includes a pressure-sensitive sensor operated by an actuator. , Initial touch, after touch and the like.

[Conventional technology]

Heretofore, a switch structure capable of detecting key velocity has not been known for an electronic wind instrument, but has been known for a keyboard.

FIG. 9 shows a key switch structure of a conventional keyboard.

This is a rubber switch having a conductive rubber portion as a movable contact.
15 have fixed contacts 17 and 19 respectively arranged thereon. These conductive rubber portions 11 and 13 are formed to protrude inside a switch rubber 21 formed in a bowl shape. These protruding conductive rubber portions 11 and 13 have different downward protruding amounts, and have different intervals with respect to the fixed contacts 17 and 19.

Therefore, the key-linked actuator 23 is
When the 21 is pressed downward from above, the conductive rubber portions 11 and 13 which are movable contacts are brought into contact with the fixed contacts 17 and 19 with a time lag. The key velocity is calculated by detecting these time differences.

However, such a switch structure has a poor touch feeling when a key is turned on. That is,
This is because the contacts once again come into contact with a time lag after the contacts come into contact with each other. In addition, it was a partial hit.

In addition, a non-contact switch structure is employed as a key switch of an electronic keyboard instrument, for example.

As shown in FIG. 10, this shutter is suspended from a key as a movable member, and a fixed shutter 31 is provided in a slit in which a light emitting element 33 and a light receiving element 35 as photocouplers are arranged on both sides so as to face each other. It is configured to move in the direction of the arrow. The photocouplers are arranged two pairs at a predetermined interval corresponding to the locus of the shutter 31. The shutter 31 has a predetermined through hole.
37 are formed.

Therefore, in this key switch, the key velocity of the key can be measured without contact.

[Problems to be solved by the invention]

However, it has not been possible to incorporate such a conventional key switch structure into an electronic wind instrument. That is, the wind instrument is played by the player in hand and has a small tube diameter, so that there is no room for space in the shutter structure. This is because the tube is too small to arrange the two pairs of photocouplers separated by a predetermined distance.
If incorporated, the wind instrument itself would be large.

Accordingly, an object of the present invention is to provide a switch structure of an electronic wind instrument that can detect the key velocity of an operator with a simple structure, can be downsized, and has a good touch feeling. I have.

[Means for solving the problem]

The present invention relates to a pressure-sensitive sensor disposed in a pipe, a rod reciprocally supported by the pipe, one end protruding outside the pipe, and the other end contacting the pressure-sensitive sensor via an elastic body. And an L-shaped actuator, which is rotatably supported on a tube with its bent portion as a fulcrum, one end of which is disposed so as to be in contact with one end of the actuator protruding, and the other end of which is provided via a stopper. An operating element that is in contact with the outer wall of the tube body, and by pressing one end of the operating element to rotate the operating element and operate the actuator, the pressure sensor is pressed, and A signal based on the pressing and a signal based on the pressing speed are output based on the output from the pressure sensor.

[Action]

In the switch structure of the electronic wind instrument according to the present invention,
An actuator whose operating element is pressed is linked to this. The pressure sensor is pressed by this actuator. As a result, the pressure sensor generates an output signal corresponding to the operation of the actuator. Based on the output signal, a signal based on the pressing and a signal based on the pressing speed are output.

〔Example〕

1 to 4 show a first embodiment of the switch structure of the electronic wind instrument according to the present invention.

First, as shown in FIG. 2, the electronic wind instrument has a substantially cylindrical tube 41 having a predetermined length. The tube 41 has a mouthpiece 43 at its tip and a built-in part 45 for electric components such as various sensors.
And a key arrangement section 51 in which a plurality of note keys 47 and octave keys 49 are arranged on the outer surface.

A switch assembly to be described later is provided inside the key disposition section 51.
53 are incorporated.

As shown in the cross section in FIG. 1, the key disposition portion 51 has a substantially rectangular cross-sectional structure. The tube body 41 in this portion includes a body 55 having a U-shaped cross section and a back cover 57 as a bottom portion thereof, and a space having a rectangular cross section is defined therein.

A key post 59 protrudes from the shoulder of the body 55,
An L-shaped key (one of the note keys 47) 61 is rotatably supported by the key post 59. That is, a key shaft 63 is fixed to the key post 59, and the key shaft 63 is inserted into a hole formed in the bent portion of the L-shaped key 61.

As shown in FIG. 1, one end of the key 61 is disposed close to the upper end of a rod-shaped actuator 65 protruding from the upper wall of the body 55. A stopper 67 is attached. The key 61 is urged clockwise by a return spring 69, and the other end of the key 61 is
It is positioned as shown in FIG.
That is, the L-shaped key 61 is configured to be able to rotate by a predetermined angle in the direction of arrow X in FIG.

The actuator 65 is housed in a rectangular internal space defined by the body 55 and the back cover 57 via a rod guide 71 so as to be vertically movable. The switch assembly 53 is housed in a belt shape.

That is, the upper end of the actuator 65 protrudes upward from the body 55 and is disposed so as to be in contact with one end of the key 61,
The lower end of the actuator 65 is covered with a rubber 73 and is in contact with and mounted on the upper surface of a thin polyimide film flexible substrate (FPC) 75.

The switch assembly 53 is housed and arranged in the internal space by the following configuration.

That is, a rail-shaped switch holder 77 is erected on the back cover 57, and a reinforcing plate 79 having a predetermined rigidity is placed and fixed on the switch holder 77.
A pressure-sensitive sensor 81 is stacked on the reinforcing plate 79.

As shown in detail in FIG. 3, the pressure-sensitive sensor 81 is formed by a pair of upper and lower silver paste contacts 85, 87 and a conductive rubber 89 of a predetermined thickness abutting and interposed between the contacts 85, 87. It is configured.

Specifically, a thin polyimide film flexible substrate (FPC) 91 is disposed on the reinforcing plate 79, and the FPC substrate
The flexible substrate 75 is stacked on the 91 via a rubber spacer 93. The rubber spacer 93 has an opening in which the conductive rubber 89 is inserted. The pair of contacts 85 and 87 are arranged to face each other inside the opening.

That is, the contact 85 of the silver paste is provided on the back surface of the contact portion of the actuator rubber 73 on the flexible substrate 75.
Are fixed by means such as printing. A contact 87 is disposed opposite to the contact 85 with the conductive rubber 89 interposed therebetween. The contact 87 is fixed to the upper surface of the flexible substrate 91.

It should be noted that the holder 7 constituting these switch assemblies 53
7. The reinforcing plate 79, the spacer 93, and the FPC boards 91 and 75 are all formed in a belt shape. Also, conductive rubber 89, contact 8
5, 87 are also formed in a belt shape. Further, these members may be individually formed. In particular, since wind instruments have a smaller number of keys than keyboard instruments, pressure-sensitive sensors may be configured independently of each other.

Further, the pressure-sensitive sensor 81 can be configured by a print-type pressure-sensitive element instead of the conductive rubber 89.

In the switch structure of the electronic wind instrument according to the above configuration, when the key 61 is pressed by the player in the direction of arrow X in FIG. 1, the actuator 65 is lowered at a predetermined speed in response to the operation.

As a result, the pressure-sensitive sensor 81 is pressed by the actuator 65. As shown in FIG. 4, the resistance value (vertical axis) of the pressure-sensitive sensor 81 changes when the conductive rubber 89 is deformed in accordance with the pressing pressure (horizontal axis).
In this case, the initial speed of change of the pressed pressure sensor 81 is defined as a key velocity (KV in the figure), and
The amount of change in the entire 81 resistance value is used as aftertouch information.
Each is to be detected. Point A in the figure is key ON / OFF
, Point B indicates the note ON, and C indicates the maximum pressed position.

 FIG. 5 shows a second embodiment of the present invention.

In this embodiment, the flexible substrate 91 in the first embodiment is omitted.

That is, a printed circuit board 101 is used in place of the reinforcing plate 79, and one electrode 103 is fixed on the upper surface thereof by, for example, printing a silver paste.

 The purpose is to reduce the number of parts.

Other structures and operations are the same as those of the above embodiment.

 FIG. 6 shows a third embodiment of the present invention.

In the pressure-sensitive sensor 81 of the first embodiment, the contact pairs 85 and 87 are disposed so as to face each other. In this embodiment, the pair of contacts 111 and 113 They are spaced apart from each other on the upper surface. 117 is contact point 111, 113
Conductive rubber that short-circuits each other.

FIG. 7 shows a fourth embodiment of the present invention.
In this embodiment, the pair of contacts 121 and 123 are fixed to the surface of the substrate 125 while being separated from each other. These contact points 121 and 123 are in contact with the conductive rubber 127, and the surface thereof is covered with a spacer rubber 129 having an opening.

In each of the third and fourth embodiments, the structure of the pressure-sensitive sensor is further simplified. Other configurations and operations are the same as those of the first embodiment.

 FIG. 8 shows a fifth embodiment of the present invention.

In this embodiment, a rubber spacer 133 having an opening is laminated on the reinforcing plate 131, and a conductive rubber 135 is provided in the opening. A pair of electrode contacts 137 and 139 are fixed to the lower surface of the flexible substrate 141 by contacting the upper surface of the conductive rubber 135,
It is arranged.

Other configurations are the same as those of the above embodiments.

〔effect〕

As described above, according to the present invention, it is possible to detect key ON, key velocity, and after-touch information with a compact structure, and furthermore, to provide a switch structure that is optimal for an electronic wind instrument that does not impair the touch feeling. Obtainable.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of the wind instrument main body showing the switch structure of the electronic wind instrument according to the first embodiment of the present invention, FIG. 2 is a front view showing the whole of the electronic wind instrument according to the first embodiment, FIG. 5 is a longitudinal sectional view showing the switch assembly according to the first embodiment. FIG. 4 is a graph showing the relationship between the pressing force applied to the actuator and the output resistance value of the pressure sensor according to the first embodiment. FIG. 6 is a longitudinal sectional view showing a switch assembly according to a second embodiment of the present invention, FIG. 6 is a longitudinal sectional view showing a switch assembly according to a third embodiment, and FIG. 7 is a fourth embodiment of the present invention. FIG. 8 is a longitudinal sectional view showing a switch structure according to a fifth embodiment of the present invention; FIG. 9 is a longitudinal sectional view showing a switch structure according to a conventional keyboard; FIG. 10 is a longitudinal sectional view showing another switch structure according to the conventional example. 41… Tube, 53… Switch assembly, 61… Key (operator), 65… Actuator, 81… Pressure sensor.

Claims (1)

(57) [Claims] 1. A pressure-sensitive sensor provided in a tube, supported reciprocally by the tube, one end protruding outside the tube, and the other end contacting the pressure-sensitive sensor via an elastic body. A rod-shaped actuator; an L-shape; rotatably supported on the pipe body with its bent portion as a fulcrum; one end is disposed so as to be able to abut on one end of the actuator protruding; And an operating element that is in contact with the outer wall of the tube through the pressing member. By pressing one end of the operating element to rotate the operating element and operate the actuator, the pressure-sensitive sensor is pressed. A switch structure of an electronic wind instrument that outputs a signal based on an output from a pressure-sensitive sensor and a signal based on the pressing speed.