JPH09171386A - Keyboard device for electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and accurately assemble a keyboard device by using a key unit which has plural keys. SOLUTION: The keyboard 15 for a specified key area is constituted by stacking the common fitting parts 52 of plural key units each molded integrally out of resin having plural key main body parts 50, a common fitting part 52 which is supported independently and swingably, and a fulcrum part 54 which couples respective keys with the fitting part 52 swingably. At this time, the key units are mutually positioned by the engagement between positioning projection and recessed parts formed on the opposite surfaces of the stacked common fitting parts 52. Further, the common fitting part 52 of at least one of the key units is engaged with an engagement recess/projection parts 97 and 99 provided to a frame as a different body to position and lock the key units to the frame 13 while the common fitting parts 52 are stacked, and thus they are easily fitted to the frame 13 by an attaching means 93 to assemble the keyboard 153.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device for an electronic musical instrument, and more particularly to a keyboard device in which a plurality of keys are integrally molded with resin and assembled into a frame.

[0002]

2. Description of the Related Art As a conventional keyboard device of this kind of electronic musical instrument, for example, a device described in Japanese Patent Publication No. 57-3080 is known. When a keyboard device of this electronic musical instrument constitutes, for example, a keyboard of one octave, the keyboard is composed of four keys.
It is divided into three structures, one structure made up of two black keys and two structures made up of every other white key in a comb shape.

[0003] That is, the structure of the white key, which is a plastic molded product, is composed of a comb-shaped first unit consisting of four keys of a C key, an E key, a G key, and a B key, and a D key, an F key, and an A key. It is divided into a comb-shaped second unit consisting of three keys.

[0004] In these three structures, a key portion, a mounting strip portion, and a hinge connecting portion for connecting them are integrally formed of resin. Therefore, in such a keyboard device, the mounting strips of the structure consisting of the black keys, the structure consisting of the four keys, and the structure consisting of the three keys, are superimposed on each other. It was screwed and attached to a key floor molded integrally with the body.

[0005]

However, in such a conventional keyboard device for an electronic musical instrument, a plurality of structural bodies, that is, key units, are overlapped with each other to form a support member (key floor) of a musical instrument casing. There is a problem that it takes a lot of time and effort to assemble the keyboard when fixing it, and that skill is required for assembling the keyboard device. The present invention has been made in order to solve the above problems, and facilitates an assembling operation when assembling a keyboard device using a key unit having a plurality of keys,
It aims to be able to easily and quickly attach multiple key units at once.

[0006]

In order to achieve the above object, the present invention provides a keyboard device for an electronic musical instrument, comprising a frame and a key unit attached to the frame,
The frame is provided separately from the instrument housing. In the above key unit, a plurality of keys, a common mounting portion for independently supporting the respective keys swingably and a fulcrum portion for swingably connecting the keys to the common mounting portion are integrally formed by resin. Is formed into a keyboard of a predetermined key range by stacking the common mounting parts of a plurality of key units, and a plurality of keys are provided on one surface of the common connecting parts that are stacked on each other. A positioning projection for positioning the units to each other is provided, and a positioning recess for fitting with the projection is provided on the other surface.

Further, at least one common mounting portion of the plurality of key units is provided with one of the positioning and locking concave and convex portions which are fitted to each other when the key unit is attached to the frame, and the frame is provided with the above One of the positioning and locking concave and convex portions is provided on the other side, and the plurality of key units are provided with attachment means for attaching the common mounting portions to the frame.

According to this structure, the common connecting portions of the plurality of key units are overlapped with each other, so that the positioning convex portion and the concave portion are fitted to each other for mutual positioning, and at least one common mounting portion thereof is provided. Since the positioning locking projections and depressions provided on the portion and the frame are also fitted to the frame, the plurality of key units can be easily attached to the frame at accurate positions by the attachment means. be able to. Therefore, the assembling work of the keyboard device is simplified, and the electronic musical instrument can be easily manufactured by attaching the keyboard device assembled to the frame to the musical instrument housing.

Further, the common mounting portions of the plurality of key units are overlapped with each other, and the positioning and locking concave and convex portions are fitted to each other.
The plurality of key units are attached to the frame by the attaching means in a state in which the overlapped common mounting portion is sandwiched by the upper member and the lower member which are separate bodies which form a part of the musical instrument casing together with the frame. It can also be attached to the upper and lower members. This makes it possible to easily assemble the plurality of key units on the frame and mount the keyboard device on the instrument housing at the same time.

Furthermore, each key of the key unit is provided with a guide that restricts the movement of the key in the arrangement direction and allows the vertical movement when the key is operated, and each guide has a stopper portion. And a slit in the frame, which allows the guide of each key of the key unit to move up and down,
It is also possible to provide a stopper that restricts the upper limit position of the key by abutting the stopper portion of the guide. In this way, the guides for each key and the stopper mechanism for the upper limit position can be completed by simply attaching a plurality of key units to the frame, which facilitates assembly and simplifies the shape of the instrument housing. Can be converted.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a keyboard device for an electronic musical instrument according to the present invention will be described below with reference to the accompanying drawings. First
FIG. 7 to FIG. 7 show an embodiment of a keyboard device for an electronic musical instrument according to the present invention.

FIG. 1 is a vertical sectional view showing the whole keyboard device. In this figure, reference numeral 11 denotes a box-shaped lower case, in which a keyboard 15 integrated with a frame 13 is provided. A part of the keyboard 15 is covered with an upper case 17, and a tone color switch or the like is arranged in the upper case 17. The lower case 11 and the upper case 17 are separate upper and lower members constituting part of the instrument housing.

FIG. 2 is an exploded perspective view of a one-octave key forming a part of the keyboard 15. In this figure, reference numeral 21 denotes a black key unit, which is composed of five black keys, namely, a C key, a D key, an F key G key, and an A key (in FIG. The F♯ key and the G♯ key are not shown in the drawing) and are integrally molded with resin.

Reference numeral 31 is a first white key unit consisting of four white keys, and is a C key, an E key, a G key, and a B key (E key and G key are not shown in FIG. 2 for convenience of illustration. ) Is integrally resin-molded. That is, the first white key unit 31 is formed by integrally molding four out of every seven white keys among the seven white keys constituting one octave.

Reference numeral 41 is a second white key unit consisting of three white keys, and includes a D key, an F key, and an A key (second key for convenience of illustration.
In the figure, the F key is not shown in the drawing). That is, the second white key unit 41
Is formed by integrally molding three white keys every other one of the seven white keys forming one octave. Therefore, the one-octave keyboard 60 shown in FIG. 5 is constructed by combining the black key unit 21, which is a partial unit, and the first white key unit 31 and the second white key unit 41, respectively. become.

As shown in FIGS. 2 and 4, each key of each of the key units 21, 31, 41 has a key body having a predetermined length that is pressed when arranged as a keyboard. The portion 50, a strip-shaped common mounting portion 52 disposed on the rear end side in the length direction of the key body portion 50 and swingably supporting the key body portion 50 in the vertical direction, and the key body portion 50. And a common support portion 52 and a fulcrum portion 54 that are integrally connected to each other, and these are integrally molded with resin.

The fulcrum portion 54 is a thin hinge portion, and as shown in FIG. 2, a thin plate-shaped horizontal thin plate piece 56, which is a portion in which the vertical cross section is formed into a substantially H shape,
It is composed of a thin plate-shaped vertical thin plate piece 58 whose horizontal cross section is an H-shaped portion. Accordingly, the fulcrum portion 54 is moved vertically (vertically) by the horizontal thin plate 56 and left and right (horizontal) by the vertical thin plate 58.
In addition, each key body 50 can be bent by a predetermined angle by elastic deformation.

The common mounting portions 52 of the key units 21, 31, and 41 are formed of plate-like members having the same width, and extend with a predetermined length in a direction orthogonal to the key body 50. It is formed as follows. Then, the common mounting portion 52 of the second white key unit 41 is superimposed on the common mounting portion 52 of the first white key unit 31, and further, the common mounting portion 52
The common mounting portion 52 of the black key unit 21 is superposed on the above, and the keyboard 60 of one octave (predetermined key range) is constituted by these seven white keys and five black keys (first). (See Figure 5).

Here, among the seven white keys constituting the one-octave keyboard 60, the first white key unit 31 and the second white key unit
The white key unit 41 is positioned by the first positioning means 61. That is, the first positioning means 61
As shown in FIG. 2, a hole 63, which is a recess formed in the central portion of the common attachment portion 52 of the first white key unit 31 in the length direction (key arrangement direction), and a second white key. Unit 41
The common mounting portion 52 is formed with a protrusion 65 which is a convex portion formed to protrude downward so as to be fitted into the hole 63 at approximately the center in the length direction (key arrangement direction).

The common mounting portion 52 of the first white key unit 31 has a convex portion 6 whose upper surface bulges upward in a rectangular shape.
7, the common mounting portion 52 of the second white key unit 41 is also formed with a rectangular concave portion 69 (the upper surface is a convex portion as shown in FIG. 2) corresponding to this shape. ing. The convex portion 67 fits into the concave portion 69, and positions the common mounting portions 52 in the width direction.

The common mounting portion 52 of the second white key unit 41
The common mounting portion 52 of the key unit 21 and the black key unit 21 has a hole 73 which is a concave portion constituting a second positioning unit 71 similar to the first positioning unit 61 as a positioning unit therebetween.
And a protrusion 75 which is a protrusion.

The holes 73 and the projections 75 are located in the respective common mounting portions 52 and extend in the length direction (key arrangement direction).
It is arranged in the middle part of. That is, the hole 73 is
In the F key support portion of the common mounting portion 52 of the white key unit 41,
The protrusions 75 are respectively provided on the F # key support portions of the common attachment portion 52 of the black key unit 21. The common mounting portion 52 of the black key unit 21 has a concave portion 77 having the same shape as the rectangular bulging convex portion 69 formed on the common mounting portion 52 of the second white key unit 41.

The one-octave keyboard 60 is constructed as described above. However, when the keyboard is constructed over a plurality of octaves, it is necessary to position the keyboard 60 of each octave. As shown in FIG. 3, the 1-octave keyboard 60 and the 1-octave keyboard on the low-pitched or high-pitched side are positioned by the third positioning means 81 in a predetermined key arrangement direction.

The third positioning means 81 has holes 83 having the same structure as the first positioning means 61 at both ends in the length direction (key arrangement direction) of the common mounting portion 52 of the first white key unit 31. And a projection 85 fitted therein. Therefore, this third
The positioning means 81 of the keyboard 60 constituting one octave
It is arranged at the end of the common mounting portion 52 in the key arrangement direction, and FIG. 3 shows the configuration of the second positioning means 81 in cross section.

The three key units 21, 31, 41, which are resin molded products, have three long holes 87, 89, 91 formed at the same position in the length direction of each common mounting portion 52 at equal intervals. Have been. These long holes 87, 89, 9
1, each has a screw 9 as shown as an example in FIG.
3 is inserted, and as a result, the key unit assembly as a whole is attached to a resin frame 13 which is separate from the instrument housing.

Here, as shown in FIGS. 1, 5, and 6, a locking wall 95 having a predetermined height is provided on the rear end side of the frame 13.
The locking wall 95 is provided with rectangular locking holes 97 corresponding to the number of keys. Horizontal projections 99 projecting from the rear end side of the common mounting portion 52 of each key are fitted into these locking holes 97, respectively. The locking hole 97 is formed so as to have a predetermined height in the vertical direction as shown in FIG. 1, and its width is substantially the same as or slightly larger than the width of the protrusion 99. There is.

In this embodiment, the projection 99 is one of the positioning and locking portions provided on the common mounting portion 52 of the key unit, and the locking hole 97 is the other of the positioning and locking portions corresponding to one of the positioning and locking portions. And the key units are 21, 31, 41
Are attached to each other when they are attached to the keyboard frame 13.

Therefore, as shown in FIG. 6, the frame 13
When the keyboard 60 is attached to the keyboard, the common mounting portion 52, which is the rear end of the key, is first held with the key body 50 held obliquely.
By inserting the projection 99 into the locking hole 97 of the locking wall 95, the movement of the common mounting portion 52 in the front-rear direction and the left-right direction is restricted, and provisional positioning is performed.

Further, as clearly shown in FIG. 2, a pair of guides 101 projecting downward along both side surfaces are provided on the lower surface of the middle portion of the key body 50 of each key in the longitudinal direction. Each of the guides 101 is formed with a stopper portion 103 that projects horizontally at the lower end thereof. The stopper portion 103, as clearly shown in FIG.
The upper limit position of the key is set by abutting on a part (stopper) 107 of the sheet-shaped rubber member 105 attached to the lower surface of the key.

A switch 109 which is turned ON by pressing a key is integrally formed on the sheet-like rubber member 105. The switch 109 is operated by an actuator 111 of the key body 50. Further, as shown in FIGS. 1 and 7, a part 1 of the rubber member 105 of the frame 13
A horizontal slit 115 is formed continuously with the vertical slit 113 that allows the guide 101 to move up and down in a portion where the 07 is disposed on the lower surface.

The horizontal slit 115 is provided in the key body 50
When the guide 101 is attached to the frame 13,
Is provided so that the stopper portion 103 can pass from top to bottom. After being once attached, the horizontal slit 115 is covered from below by a part 107 of the rubber member 105, and the rubber member 10
A part 107 of 5 functions as a stopper for retaining the guide 101. That is, the stopper 103 comes into contact with the lower surface of the part 107 of the rubber member 105 from below, thereby restricting the retaining and the upper limit position of the key.

As shown in FIG. 1, the rubber member 10
The lower surface of 5 is attached by being pressed by the printed circuit board 117. Reference numeral 119 denotes a battery holder formed on the frame 13. In the keyboard device of the electronic musical instrument thus configured, a keyboard 60 of one octave is assembled, and then a keyboard 15 of a plurality of octaves is mounted on the frame 13.

In this case, the first white key unit 31 is positioned from above and the second white key unit 41 is superposed. The positioning at this time is such that the other projection 65 is fitted into one hole 63 of each common mounting portion, which is the first positioning means 61, and at the same time, one convex portion 67 is fitted into the other concave portion 69.
Insert into and perform.

As a result, seven white keys are arranged and assembled as shown in FIG. 5, and the E key and the F key are beautifully assembled with a predetermined gap (equal spacing in the length direction). To be
Next, the black key unit 21 is overlaid from above the white key unit 41. The positioning at that time is performed by the projection 75 on one side of each common mounting portion 52 which is the second positioning means 71.
Is inserted into the other hole 73, and at the same time, the other convex portion is inserted into the one concave portion 77.

After the assembly of the one-octave keyboard 60 is completed in this way, the entire assembly is assembled to the frame 13 as shown in FIG. After that, FIG. 1 and FIG.
As shown in the figure, a screw 93 is inserted into a hollow mounting boss 11a provided in the lower case 11, and a long hole formed in the common mounting portion 52 of each key unit is inserted through the hole of the boss 11a and the frame 13. 91 (or 87, 89), and its screw 93 is screwed into the boss 17a having the screw hole of the upper case 17, and is fixed by tightening.

When a plurality of octave keyboards are arranged in the frame 13, each of the adjacent bass or treble keyboards 6
Positioning between zero is performed by third positioning means 81 (see FIG. 3). That is, with respect to the keyboard 60 of a certain octave, the protrusion 85 protruding from the lower surface of the B key support portion of the common mounting portion 52 of the first white key unit 31 is used as the first white key constituting the octave on the higher tone side. Unit 3
Positioning is performed by fitting the hole in the C-key support portion of the first common mounting portion 52 into the hole 83.

FIG. 6 is a sectional view showing a state in the middle of this assembling. The assembling method will be further described with reference to FIG. Each key unit 21, relative to the frame 13,
When assembling the keyboard 60 in which 31, 41 are assembled,
The protrusion 99, which is one of the positioning locking projections and projections provided at the rear end of the common mounting portion 52 which is the temporary assembly means, is provided with the other of the positioning locking projections and depressions formed on the locking wall 95 of the frame 13. Is inserted into the locking hole 97. Thereby, the movement of the key rear end portion in the front-rear and left-right directions is regulated, and positioning is performed.

In this case, the rear end side wall surface of the common mounting portion 52 contacts the front surface of the locking wall 95. In this state, the key body 50 of the keyboard 60 can move up and down as a whole, and the guide 101 can be passed through the vertical slit 113 and the horizontal slit 115 of the frame 13 together with the stopper 103 from above. At that time, a part 107 of the rubber member 105 shown in FIG.
3 is allowed, but after that, this rubber member 105
Covers the horizontal slit 115 of the frame 13 on the lower surface side to lock the stopper portion 103 and prevent the stopper portion 103 from coming off.

Accordingly, the keyboard 60 can be very easily assembled to the frame 13 by a series of operations. Thereafter, the common mounting portion 52 of each key unit may be fixed to the frame 13 with the screw 93. At this time, as described above, the boss 11a of the lower case 11 and the upper case 1
7 are fastened together by screws 93 to the boss 17a. At this time, the entire body is turned upside down and screwed so that the case 11 can be tightened from the back side.

In this way, a keyboard device having a plurality of octave keys on the frame 13 can be assembled very easily. In this case, the first and second positioning means 61, 7
1 is a resin molded product, which is arranged almost at the center in the key arrangement direction of the common mounting portion 52 where the deviation and the error are the smallest, so that the error is small even in the portion where the white keys are adjacent to each other after assembly, and Can be assembled beautifully.

When each key of the keyboard device is pressed, the horizontal thin plate piece 56 of the fulcrum 54 bends up and down when the key body 50 is pressed, and swings up and down about the common mounting part 52 as a fulcrum as a whole. . Then, by turning on the switch 109 disposed at a predetermined portion of the frame 13, a predetermined musical tone is generated.

The seven white keys that make up the one-octave keyboard are composed of a first white key unit integrating an F key, an A key, a C key, and an E key, a G key, a B key, and a The D key and the second white key unit which are integrated may be divided into two. In this case, when the first white key unit and the second white key unit are combined to form a keyboard of one octave, the first positioning means for positioning these white key units is used. It is preferable to dispose them at the A key supporting portion and the B key supporting portion (substantially the center portion of the common mounting portion in the key arrangement direction) of each common mounting portion of both white key units.

In the case where one octave keyboard, which is higher or lower in pitch than the one octave keyboard, is arranged in parallel with the one octave keyboard, the third positioning means for positioning between the octave keys is provided. It is arranged at the end of the common mounting portion of the keyboard in the key arrangement direction, that is, between the E key support portion and the F key support portion.

[0044]

As described above, according to the present invention, a plurality of keys, a common connecting portion, and a fulcrum portion for each key are integrally formed of resin in a key unit to form a plurality of key units. Since the keyboard in the predetermined key range is constructed by stacking the common mounting parts, a good-looking keyboard can be manufactured at low cost, and when the common connecting parts of the plurality of key units are stacked on each other, By fitting the positioning convex portion on one surface and the positioning concave portion on the other surface, mutual positioning can be easily performed, and a keyboard with a good key arrangement can be easily assembled.

The keyboard for one octave can be easily obtained by overlapping the common mounting portions of the white key unit and the black key unit. Further, the plurality of key units are positioned with respect to the frame by fitting at least one of the overlapping common mounting portions of the plurality of key units and the positioning locking concave-convex portion provided on the frame. Therefore, temporary mounting can be performed when mounting multiple key units on a frame separate from the instrument housing, and multiple key units can be easily and quickly mounted at once by mounting means such as screws. It can be mounted in the correct position.

Further, the plurality of key units are overlapped with their common mounting portions, and the positioning and locking concave and convex portions are fitted to each other. If the frame and its upper and lower members are attached to the frame while being held between the separate upper and lower members, the assembly of a plurality of key units to the frame and the instrument housing of the keyboard device Attachment to the body can be easily performed at the same time.

Furthermore, it is possible to complete the guide for each key and the stopper mechanism at the upper limit position by simply attaching a plurality of key units to the frame, which makes assembly even easier. At the same time, the shape of the instrument housing can be simplified.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a keyboard device for an electronic musical instrument according to the present invention.

FIG. 2 is an exploded perspective view of three types of key units constituting the keyboard.

FIG. 3 is a sectional view taken along line XX of FIG. 2 in an assembled state.

FIG. 4 is a side view showing the vicinity of a common mounting portion of the key unit in the assembled state.

FIG. 5 is a plan view showing a state in which the keyboard is attached to a frame.

FIG. 6 is a vertical sectional view similar to FIG. 1, showing a state in the middle of mounting the same,

FIG. 7 is a perspective view showing the back surface side of the frame.

[Explanation of symbols]

11 lower case, 13 frame, 15 keyboard, 17
... upper case, 21 ... black key unit, 31 ... first white key unit, 41 ... second white key unit, 50 ... key body part, 52 ... common mounting part, 54 ... fulcrum part, 61 ... first Positioning means, 63 ... hole, 65 ... projection, 71 ... second positioning means, 73 ... hole, 75 ... projection, 81 ... third positioning means, 83 ... hole, 85 ... projection, 87, 89, 91 ... length Holes: 93: screws (attachment means), 95: locking walls, 97: locking holes (the other of the positioning and locking irregularities), 99: protrusions (one of the positioning and locking irregularities), 101: guides , 103
... Stopper part, 105 ... Rubber member, 113 ... Vertical slit, 115 ... Horizontal slit

Claims (3)

[Claims] 1. A keyboard device for an electronic musical instrument, comprising a frame and a key unit attached to the frame, wherein the frame is provided separately from a musical instrument housing, and the key unit includes a plurality of keys. A common mounting portion that swingably and independently supports the keys and a fulcrum portion that swingably connects the keys to the common mounting portion are integrally formed of resin, and a plurality of key units are formed. A keyboard of a predetermined key range is formed by superimposing the common mounting portions of, on one surface of the common mounting portions of the plurality of key units that are superposed on each other, A positioning projection for positioning is provided on the other surface, and a positioning recess for fitting with the projection is provided on the other surface, and the key unit is attached to at least one common mounting portion of the plurality of key units. When you settle on One of the positioning locking concavo-convex parts that fit with each other is provided, and the other corresponding to one of the positioning locking concavo-convex parts is provided in the frame, and the common mounting parts of the plurality of key units are overlapped. A keyboard device for an electronic musical instrument, comprising an attaching means for attaching to the frame in a state. 2. The mounting means superimposes the common mounting portions of the plurality of key units, the positioning locking concave-convex portions are fitted to each other, and the superposed common mounting portions are respectively arranged together with the frame. A means for attaching a plurality of key units to the frame and the upper and lower members in a state of being sandwiched by separate upper and lower members that form a part of the housing. A keyboard device for an electronic musical instrument according to item 1 of the above. 3. Each key of the key unit has a guide that restricts the movement of the key in the arrangement direction and enables the vertical movement when the key is operated, and each guide has a stopper portion. The frame includes a slit that allows the guide of each key of the key unit to move up and down, and a stopper that restricts the upper limit position of the key by abutting the stopper portion of the guide. A keyboard device for an electronic musical instrument according to claim 1 or 2, wherein: