JPH0631939B2 - Electronic musical instrument keyboard device - Google Patents

Description

Description: 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 of resin and assembled into a frame.

[Conventional technology]

As a conventional keyboard device for this kind of electronic musical instrument, for example, the one described in Japanese Patent Publication No. 57-3080 is known.

In the keyboard device of this electronic musical instrument, for example, when a keyboard of 1 octave is configured, the keyboard is formed by combing one structure consisting of four black keys and every other white key.
It is divided into three structures and one structure.

That is, the structure of the white key, which is a plastic molded product,
Two comb-tooth-shaped first units consisting of four keys C, E, G, and B and two comb-tooth-shaped units consisting of three keys D, F, and A It is divided.

And each of these three structures is a key.
The portion, the mounting strip portion, and the hinge connecting portion connecting these portions are integrally molded of resin.

Therefore, in such a keyboard device, the mounting strips of the black key structure, the four-key white key structure and the three-key white key structure are superposed on each other to form a frame. It was screwed and assembled.

[Problems to be solved by the invention]

However, in such a conventional keyboard device for an electronic musical instrument, it takes a lot of time and effort to assemble a plurality of structural bodies, that is, the key units and fix them to the frame, so that the skill is required. There was a problem that it took.

The present invention has been made to solve the above problems, and facilitates the assembling work when assembling a key unit having a plurality of keys to a frame so that a plurality of keys can be easily, quickly and accurately attached at one time. The purpose is to

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention comprises 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. A keyboard device for an electronic musical instrument, comprising: a key unit having the key unit; and a mounting means for mounting a common mounting portion of the key unit to the frame, wherein the key unit is mounted on the common mounting portion of the key unit. One of the positioning locking concave-convex portions is provided so as to be fitted to each other at the time of attachment, and the frame is provided with the other corresponding to one of the positioning locking concave-convex portions.

Further, in the above key unit, a plurality of keys, a common connecting portion, and a fulcrum portion for each key are integrally molded with resin, and a predetermined mounting is made by overlapping a common mounting portion of a plurality of key units. It is preferable that the keyboard of the key range can be configured, and the common connecting portion is provided with a positioning projection on one surface of the common connection portion and a positioning recess on the other surface for fitting with the projection. .

Further, it is preferable that one octave of the keys constitutes one unit, and the plurality of key units constituting the keyboard are at least a white key partial unit and a black key partial unit.

Further, it is preferable that one and the other of the concave and convex portions for positioning and locking be provided in two or more places at a predetermined distance from the common mounting portion of the key unit and the frame, respectively.

Alternatively, each key of the key unit is provided with a guide portion that restricts the movement of the key in the arrangement direction and enables the vertical movement when the key is operated, and when mounting the key unit on the frame. It may be possible to provide a means for locking and retaining the guide portion of each key.

[Work]

The keyboard device for an electronic musical instrument according to the present invention has the above-described configuration and is compatible with the common mounting portion of the key unit and the frame when the key unit for independently swingably supporting a plurality of keys is attached to the frame. By fitting one of the concave and convex portions for positioning and locking provided on the other side, the key unit is temporarily assembled at a predetermined position on the frame, and the movement in the front-back and left-right directions is restricted. , Easy to attach multiple keys at once easily and accurately.

In addition, the key unit is formed by integrally molding a plurality of keys, a common connecting portion, and a fulcrum portion for each key with a resin, and by stacking the common mounting portions of the plurality of key units, a predetermined key area is formed. By constructing the keyboard of, it is possible to inexpensively produce a good-looking keyboard, and when the common connecting portions of the plurality of key units are overlapped with each other, the positioning convex portion on one surface and the other By fitting the positioning recesses on the surface of (1) to each other, mutual positioning can be easily performed, and a keyboard with a good key arrangement can be easily assembled.

Then, a keyboard for one octave can be easily obtained by superposing the common mounting portions of the white key partial unit and the black key partial unit, which are key units.

Also, if one and the other of the positioning and locking concave and convex portions are provided at two or more positions on the key unit and the frame at a predetermined distance from each other, the concave and convex portions are fitted to each other to make the fitting portion a fulcrum. Since the movement of the key unit in the rotating direction can be restricted, the positioning becomes more reliable.

Further, by locking the guide portion of each key to prevent the key portion from slipping off when the key unit is attached to the frame, the locking by the fitting of the positioning locking concave-convex portion and the locking of the guide portion are performed. The vertical rotation of the key unit is also restricted, which makes the mounting easier.

〔Example〕

An embodiment of a keyboard device for an electronic musical instrument according to the present invention will be described below with reference to the drawings.

1 to 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 the figure, 11 is a box-shaped lower case, and a keyboard 15 assembled integrally with the frame 13 is provided in the lower case 11. 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.

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 has five black keys, namely, C # key, D # key, F # key, G # key, and A #.
A key (D # key, F # key and G # key are not shown in FIG. 2 for convenience of illustration) is integrally resin-molded.

31 is a first white key unit consisting of four white keys,
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) are integrally resin-molded. That is, the first white key unit 31 is formed by integrally molding every other white key out of the seven white keys forming one octave.

41 is a second white key unit consisting of three white keys,
The D key, the F key, and the A key (the F key is omitted in FIG. 2 for convenience of illustration) are integrally resin-molded. That is, the second white key unit 41 is formed by integrally molding every other white key out of the seven white keys forming one octave.

Therefore, the one-octave keyboard 60 shown in FIG. 5 has the above-mentioned black key unit 21, which is a partial unit, and the first octave keyboard 60.
The white key unit 31 and the second white key unit 41 are combined.

Each key of each of these key units 21, 31, 41 has a second
As shown in FIGS. 4 and 5, the key body 50 having a predetermined length to be pressed when it is arranged and arranged as a keyboard.
And a strip-plate-shaped common mounting portion 52 disposed on the rear end side of the key body portion 50 in the longitudinal direction and swingably supporting the key body portion 50 in the vertical direction, and the key body portion 50. It has a fulcrum portion 54 that integrally connects the mounting portion 52 and these, and these are integrally molded with resin.

The fulcrum portion 54 is a thin-walled hinge portion, and, as shown in FIG. 2, a thin plate-shaped horizontal thin plate piece 56 whose vertical cross section is formed into a substantially H-shape, and its horizontal direction. It is composed of a thin plate-shaped vertical thin plate piece 58 whose section is formed in an H shape.

Therefore, the fulcrum portion 54 can be bent vertically by the horizontal thin plate piece 56 (vertical direction) and horizontally by the vertical thin plate piece 58 (horizontal direction) by elastically deforming the key body 50 by a predetermined angle. it can.

Also, each common mounting portion 5 of each key unit 21, 31, 41
Reference numeral 2 is a plate-shaped body having the same width, and is formed so as to extend in a direction orthogonal to the key body 50 with a predetermined length.

Then, the common mounting portion 52 of the second white key unit 41 is superposed on the traffic mounting portion 52 of the first white key unit 31, and the common portion of the black key unit 21 is further mounted on the common mounting portion 52. The mounting portion 52 is overlapped, and the seven white keys and the five black keys constitute a keyboard 60 of one octave (predetermined key range) (see FIG. 5).

Here, the first white key unit 31 and the second white key unit 41 of the seven white keys constituting the octave keyboard 60 are positioned by the first positioning means 61.

That is, the first positioning means 61, as shown in FIG. 2, has a hole 63 formed at a substantially central portion in the length direction (key arrangement direction) of the common mounting portion 52 of the first white key unit 31;
The second white key unit 41 includes a common mounting portion 52, and a protrusion 65 that is formed so as to protrude downward so as to be fitted into the hole 63 at a substantially central portion in the length direction (key arrangement direction).

Further, the common mounting portion 52 of the first white key unit 31 has a convex portion 67 whose upper surface bulges upward in a rectangular shape, and the common mounting portion 52 of the second white key unit 41 also has this shape. Correspondingly, a rectangular recessed portion 69 (the upper surface is a convex portion as shown in FIG. 2) 69 is formed.

The convex portion 67 is fitted into the concave portion 69 to position the common mounting portions 52 in the width direction.

In the common mounting portion 52 of the second white key unit 41 and the common mounting portion 52 of the black key unit 21, a second positioning means 71 similar to the first positioning means 61 is configured as a positioning means between them. A hole 73 and a protrusion 75 are formed.

The holes 73 and the protrusions 75 are arranged in the respective common attachment portions 52 and in the middle portion in the length direction (key arrangement direction). That is, the hole 73 is provided in the F key support portion of the common attachment portion 52 of the second white key unit 41, and the protrusion 75 is provided in the F # key support portion of the common attachment portion 52 of the black key unit 21.

Further, the common mounting portion 52 of the black key unit 21 is formed with a recessed 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 constructing the keyboard over a plurality of octaves, it is necessary to position the keyboard 60 of each octave.

As shown in FIG. 3, the one-octave keyboard 60 and the one-octave keyboard on the lower tone side or the higher tone side are as follows.
Predetermined positioning such as the key arrangement direction is performed by the third positioning means 81.

This third positioning means 81 is used for the first white key unit 3
Holes 83 having the same configuration as the first positioning means 61 are provided at both ends in the length direction (key arrangement direction) of the first common mounting portion 52.
And a projection 85 fitted therein.

Therefore, the third positioning means 81 is arranged at the end of the common mounting portion 52 of the keyboard 60 constituting one octave in the key arrangement direction, and FIG. 3 shows the second positioning means 81. The configuration is shown in cross section.

In addition, the above three key units 21, 3 which are resin molded products
1, 41 have three long holes 87, 89, 91 formed at equal intervals at the same position in the length direction of each common mounting portion 52.

As shown in FIG. 3 as an example, screws 93 are respectively inserted into these elongated holes 87, 89, 91, and as a result, the key unit assembly is entirely made of resin.
It is attached to 3.

Here, as shown in FIGS. 1, 5, and 6, a locking wall 95 having a predetermined height is provided upright on the rear end side of the frame 13, and the locking wall 95 has a rectangular shape. Locking holes 97 are formed corresponding to the number of each key.

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 locking concave and convex portions provided on the common mounting portion 52 of the key unit, and the locking hole 97 is the other corresponding to one of the positioning locking concave and convex portions. When the key units 21, 31, 41 are attached to the keyboard frame 13, they are fitted to each other.

Therefore, when mounting the keyboard 60 on the frame 13 as shown in FIG. 6, the protrusion 99 of the common mounting portion 52, which is the rear end portion of the key, is engaged with the key main body 50 held obliquely. By inserting into the locking hole 97 of the stop wall 95, the movement of the common mounting portion 52 in the front-rear direction and the left-right direction is regulated, and provisional positioning is performed.

Also, as clearly shown in FIG. 2, a pair of guides 101 projecting downward along both side surfaces are formed on the lower surface of the middle portion of the key body 50 of each key in the longitudinal direction. Cage,
A stopper portion 103 protruding horizontally is formed at the lower end of each guide 101.

The stopper portion 103 is, as clearly shown in FIG.
Sheet-shaped rubber member 1 attached to the lower surface of the frame 13
The upper limit position of the key is set by contacting a part 107 of 05.

A switch 109 that is turned on by pressing a key is integrally provided on the sheet-shaped rubber member 105, and the switch 109 is operated by an actuator section 111 of the key body section 50.

Further, as shown in FIG. 1 and FIG.
A vertical slit 1 that allows the guide 101 to move up and down is provided at a portion where a part 107 of the rubber member 105 of FIG.
A horizontal slit 115 is formed continuously with the line 13.

The horizontal slit 115 is formed in the frame 1 of the key body 50.
3 is attached to the stopper portion 10 of the guide 101.
3 is provided so that it can pass from top to bottom.

Then, once attached, part 1 of the rubber member 105
The horizontal slit 115 is covered from below by 07, and a part 107 of the rubber member 105 acts as a stopper for preventing the guide 101 from coming off. That is, the stopper portion 1
03 contacts the lower surface of the part 107 of the rubber member 105 from below, thereby restricting the retainer and the upper limit position of the key.

As shown in FIG. 1, the lower surface of the rubber member 105 is pressed and attached by the printed circuit board 117.
Reference numeral 119 is a battery holding portion formed on the frame 13.

In the keyboard device of the electronic musical instrument configured as described above,
After assembling the octave keyboard 60, the octave keyboard 15 is assembled to 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 performed by fitting the other projection 65 into one hole 63 of each common mounting portion which is the first positioning means 61 and at the same time fitting one convex portion 67 into the other concave portion 69. .

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).

Next, the black key unit 21 is superposed on the white key unit 41 from above. 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 assembling of the one-octave keyboard 60 is completed in this way, the whole is assembled to the frame 13 as shown in FIG.

Then, as shown in FIGS. 1 and 3, the lower case 1
The screw 93 is inserted into the hollow mounting boss 11a provided in No. 1 and is passed through the holes of the boss 11a and the frame 13 into the long hole 91 (or 87, 89) formed in the common mounting portion 52 of each key unit. Insert the screw 93 into the upper case 1
It is screwed into a boss 17a having a screw hole of No. 7, and is tightened and fixed.

When a plurality of octave keyboards are arranged in the frame 13, the positioning between the adjacent low-pitched or high-pitched keyboards 60 is performed by the 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. C of the common mounting portion 52 of the unit 31
Positioning is performed by fitting into the hole 83 formed in the key support portion.

FIG. 6 is a cross-sectional view showing a state during the assembling.
The assembly method will be further described with reference to this drawing.

When assembling the keyboard 60 in which the key units 21, 31, 41 are assembled to the frame 13, one of the positioning locking concave and convex portions projecting at the rear end of the common mounting portion 52, which is a temporary mounting means. A certain projection 99 is inserted into the locking hole 97 which is the other of the positioning locking concave-convex portion formed on the locking wall 95 of the frame 13. As a result, the movement of the rear end portion of the key in the front-rear direction and the left-right direction is restricted, 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 together with the stopper 103 thereof can be passed through the vertical slit 113 and the horizontal slit 115 of the frame 13 from above.

At that time, a part 107 of the rubber member 105 shown in FIG. 1 is elastically deformed to allow the stopper 103 to be inserted therethrough, but thereafter, the rubber member 105 covers the horizontal slit 115 of the frame 13 on the lower surface side. The stopper 103 is locked to prevent the stopper 103 from coming off.

Therefore, the keyboard 60 can be assembled to the frame 13 by a series of operations very easily.

After that, 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 boss 17a of the upper case 17 together with the screw 93.

At that time, so that it can be tightened from the back side of the case 11,
Turn over the whole and perform screwing work.

In this way, a keyboard device having a plurality of octave keys on the frame 13 can be assembled very easily. In this case, since the first and second positioning means 61, 71 are arranged substantially in the center of the common mounting portion 52 in the key arrangement direction in which the resin molded product has the smallest deviation or error, the white keys are assembled together after assembly. The error is small even if the parts are adjacent to each other, and the parts can be assembled beautifully in appearance.

When the key body 50 of each key of the keyboard device is pressed, the horizontal thin plate piece 56 of the fulcrum 54 bends up and down,
As a whole, it swings vertically with the common mounting portion 52 as a fulcrum. Then, by turning on the switch 109 provided in a predetermined portion of the frame 13, a predetermined musical sound is generated.

The seven white keys that make up the octave keyboard are
The key is divided into a first white key unit that integrates the A key, the C key, and the E key, and a second white key unit that integrates the G key, B key, and D key. Is also good.

In this case, when the first white key unit and the second white key unit are combined to form a one-octave keyboard, the first positioning means for positioning between these white key units are It is advisable to dispose them on the A key supporting portion and the B key supporting portion of each common mounting portion of both white key units (substantially the central portion of the common mounting portion in the key arrangement direction).

Further, when arranging a higher octave or lower octave keyboard in parallel with the octave keyboard, the third positioning means for positioning between the octave keyboards is common to the octave keyboards. It is arranged at the end of the mounting portion in the key arrangement direction, that is, between the E key supporting portion and the F key supporting portion.

[Effect]

As described above, according to the present invention, the common mounting portion of each key unit includes one of the positioning locking projections and depressions provided on the common mounting section and the other positioning locking projections and depressions provided on the frame. By fitting with, the movement in the length direction and the width direction is restricted.

As a result, when the key is rocked up and down with the fulcrum of each key unit as a fulcrum to attach the key unit to the frame, the common mounting portion of the key unit does not shift with respect to the frame.

That is, by fitting one and the other of the positioning locking projections and depressions provided on the common mounting portion of the key unit and the frame, it is possible to perform temporary assembly when the key unit is attached to the frame, and Multiple keys can be installed easily and quickly.

Further, the key unit is formed by integrally molding a plurality of keys, a common connecting portion, and a fulcrum portion for each key with a resin, and by stacking a common mounting portion of a plurality of key units, a keyboard having a predetermined key range is formed. With this configuration, it is possible to inexpensively produce a good-looking keyboard, and when the common connecting portions of the plurality of key units are overlapped with each other, the positioning convex portion of one surface and the positioning convex portion of the other surface are formed. By fitting the positioning recess into each other, mutual positioning can be easily performed, and a keyboard with a good key arrangement can be easily assembled.

Also, a keyboard for one octave can be easily obtained by stacking the common mounting portions of the white key unit and the black key unit.

Further, if the positioning and locking concave-convex portions are provided at two or more positions on the key unit and the frame, respectively, at a predetermined distance from each other,
By fitting the respective concave and convex portions, the movement of the key unit with the fitting portion as a fulcrum in the rotation direction can be restricted, so that the positioning becomes more reliable.

Further, by locking the guide portion of each key to prevent the key unit from slipping off when the key unit is attached to the frame, the locking by the fitting of the concave-convex portion for positioning locking and the locking of this guide portion, Rotation of the key unit in the vertical direction is also restricted, and mounting becomes easier.

[Brief description of drawings]

FIG. 1 is a longitudinal 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, and FIG. 3 is an assembled state. 2 is a sectional view taken along the line III-III of FIG. 2, FIG. 4 is a side view showing the vicinity of a common mounting portion of the key unit in its assembled state, and FIG. 5 is a plan view showing the state of mounting the keyboard on the frame. FIG. 6 is a vertical sectional view similar to FIG. 1 showing a state in the middle of mounting the same, and FIG. 7 is a perspective view showing the back side of the frame. 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 ...... Support point part, 61 ...... First positioning means, 63 ...... hole, 65 ...... Projection, 71 ...... Second positioning means, 73 ...... Holes, 75 ... Projections, 81 ... Third positioning means, 83 ... Holes, 85 ... Projections, 87, 89, 91 ... Long holes, 93 ... Screws (attachment means), 95 ... Stop wall, 97 ... Locking hole (the other side of the positioning locking concave-convex part), 99 ... Projection (one side of the positioning locking concave-convex part), 101 ... Guide, 103 ... Stopper part, 105 ... Rubber Member, 113 …… Vertical slit, 115 …… Horizontal slit

Claims (5)

[Claims] 1. A key unit having a frame, 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. And a mounting means for mounting the common mounting part of the key unit to the frame, and positioning for fitting the key unit to the common mounting part of the key unit when mounting the key unit to the keyboard frame. A keyboard device for an electronic musical instrument, wherein one of the engaging and recessing concave and convex portions is provided, and the other corresponding to one of the positioning and locking concave and convex portions is provided in the frame. 2. The key unit, wherein the plurality of keys, a common connecting portion, and a fulcrum portion for each key are integrally formed of resin, and the common mounting portions of the plurality of key units are overlapped with each other. According to the present invention, a keyboard having a predetermined key range is configured by providing a positioning convex portion on one surface of the common connecting portion that is overlapped with each other and a positioning concave portion that fits with the convex portion on the other surface. The keyboard device for an electronic musical instrument according to claim 1, wherein 3. The key unit comprises one unit of one octave key, and the plurality of key units are at least a white key partial unit and a black key partial unit. A keyboard device for an electronic musical instrument according to claim 2. 4. One or the other of said positioning and locking concave and convex portions is provided at two or more locations at a predetermined distance from the common mounting portion of said key unit and said frame, respectively. A keyboard device for an electronic musical instrument according to any one of claims 1 to 3. 5. A guide portion is provided on each key of the key unit for restricting the movement of the key in the arrangement direction and enabling the vertical movement when the key is operated, and the key unit is attached to the frame. A keyboard device for an electronic musical instrument according to any one of claims 1 to 4, further comprising means for locking and retaining the guide portion of each key when the key is played.