JPH03197998A - Keyboard device - Google Patents

Abstract

PURPOSE:To decrease the number of components and man-hours and to reduce the cost by molding a keyboard chassis and a console panel integrally of synthetic resin through a flexible part. CONSTITUTION:A lower case 2 is molded integrally with the front end part of keyboard chassis 1 made of synthetic resin through the thin flexible part 3, the console panel 4 is molded integrally with the rear end part of the keyboard chassis 1 through a thin flexible part 5, and all black keys 6 are molded integrally with the tip part of the keyboard chassis 1 through a flexible part 7. Thus, the keyboard chassis 1 and console panel 4 are molded integrally of the synthetic resin through the flexible part 3 to decrease the number of components and man-hours, thereby reducing the cost.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a keyboard device for an electronic keyboard instrument such as an electronic piano.

[Prior art and its problems 1] Keyboard devices for electronic keyboard instruments such as electronic pianos, electronic organs, and electronic synthesizers have an external appearance that is similar to that described in Japanese Patent Application Laid-Open No.
As described in Publication No. 191896, a plurality of keys consisting of white keys and black keys are arranged in parallel on the front half of the keyboard chassis based on a predetermined arrangement, and various switches etc. are arranged on the rear half of the keyboard chassis. It has a structure in which a console panel is provided, and a lower case is provided at the bottom of the keyboard chassis.

However, in conventional keyboard devices like this, the keyboard chassis, keys, console panel, and lower case are all separate pieces, so there are problems with the number of parts and assembly man-hours, resulting in high costs. Ta.

For example, JP-A-64-91186, JP-A-6
Publication No. 4-91187 describes a keyboard device in which a plurality of keys are integrally molded from synthetic resin, but this l'!
The problem with the i-device is that the number of parts and assembly man-hours can only be reduced to some extent for the keys, and the keyboard device as a whole is still insufficient.

[Object of the Invention] This invention was made in view of the above-mentioned circumstances, and its purpose is to provide a keyboard device that can further reduce the number of parts and the number of assemblies. be.

[Summary of the Invention] In order to achieve the object as stated above, the invention stated in Claim 11 has the key point that the keyboard chassis and the console panel are integrally molded from synthetic resin through a flexible part. do.

The main point of the invention as set forth in claim 2 is that the 119B chassis and the lower case are integrally molded from synthetic resin via a flexible portion.

Moreover, the invention according to claim 3 is! ! The main point is that the board chassis and the console panel are integrally molded from synthetic resin through the flexible part, and the console panel and the key are integrally molded from synthetic resin through the flexible part.

Furthermore, the invention according to claim 4 is,! ! The main point is that the console panel and lower case of the chassis are integrally molded from synthetic resin through the I+r flexible parts, and the console panel and the key are integrally molded from synthetic resin through the flexible parts. do.

[Example] Hereinafter, the present invention will be described in detail with reference to Examples.

FIG. 1 shows the main parts of a keyboard device according to a first embodiment of the present invention.

This ff1li device uses a synthetic resin keyboard chassis l.
A lower case 2 is integrally molded on the front end of the t11N chassis l via a thin flexible part 3, and a console panel 4 is integrally molded on the rear end of the t11N chassis l via a thin flexible part 5. All black keys 6 are thin-walled at the tip.
They are integrally molded via part 7.

Among these, struts 11 with screw holes are superimposed at a plurality of locations on the lower surface of the keyboard chassis l. Immediately after molding, the lower case 2, which is in the state shown by the dashed line, first has a flexible portion 3.
Due to the elastic deformation of
1, and then inserted into a screw insertion hole (not shown) formed in the lower case 2, the screw 12 is screwed into the column 11 with a counter-socket. attached to the end face. Leg portions 13 are formed at a plurality of locations on the surface of the lower case 2.

There are notches i at multiple locations on the rear inner surface of the console panel 4.
't! ! Reinforcing ribs 16 having 15 are provided.

Immediately after molding, the console panel 4, which is in the state shown by the dashed line, is positioned above the rear of the keyboard chassis l, as shown by the solid line, due to bony deformation of the flexible portion 5.
By locking the notch 15 of the reinforcing rib 16 to the locking wall 17 formed on the upper surface of the rear end of the keyboard chassis l,
l! It is fixed to the rear of the board chassis l. Note that the console panel 4 may be fixed to the rear of the keyboard chassis l by providing a support with a screw hole on the inner surface of the console panel 4 or on the top surface of the keyboard chassis l, and screwing a screw into this screw hole support. .

Immediately after molding, the black key 6 has the shape shown by the dashed line! As shown in S, when the console panel 4 is attached to the rear of the keyboard chassis 1, it is placed above the center of the keyboard chassis 1, as shown by the solid line. To explain the black key 6 in this state, a push-button self-resetting rubber switch 22 is disposed below a switch suppressing protrusion 21 having a cross-shaped cross section and extending vertically from the center of the lower surface of the black key 6. The rubber switch 22 is located at -L of the keyboard chassis L.
It is provided on the upper surface of one end of the flexible circuit board 23 provided on the surface. The other end of the flexible circuit board 23 is located below the console panel 4, and constitutes the electric circuit of this keyboard device.

The black key 6 is urged upward by the elastic restoring force of the flexible IA section 7 and the self-returning force of the rubber switch 22.1 Normally, the black key 6 is suspended from the front lower end of the side plate 24. L
The letter-shaped hook 25 passes through a hole 26 formed in the keyboard chassis l and comes into contact with a belt-shaped upper limit stopper 27 made of felt or the like provided on the dot surface of the keyboard chassis l, thereby reaching a predetermined initial position (upper limit). position 2i).

The lower end of the side plate 24 of the black key 6 comes into contact with the upper surface of the wI board chassis l above the upper limit stopper 27, thereby forming a band-shaped lower limit stopper 28 made of felt or the like for regulating the lower limit l of the black key 6. is provided. On the front top surface of the keyboard chassis l, the vertical movement and horizontal vibration of the black key 6 are recorded.
A key guide 29 is provided to guide the key in the stopped state.

In this w1@ device, when the black key 6 is pressed against the elastic force of the flexible part 7 and the elastic force of the rubber switch 22, the switch pressing protrusion 21 presses the rubber switch 22, and this suppression causes the rubber The switch 22 is elastically deformed and turned on, and a musical tone is generated. pressed black key 6
When the key pressing force is released, the black key 6 is returned to its original initial position by the elastic restoring force of the flexible portion 7 and the elastic restoring force of the rubber switch 22, and at the same time, the rubber switch 2
2 also elastically returns to switch off.

By the way, this keyboard device has a synthetic resin keyboard chassis l and a lower case? and the console panel 4 are integrally molded through the flexible portion 3.5, and the black key 6 is integrally molded onto the console panel 4 through the flexible portion 7, so the number of parts and assembly man-hours are considerably reduced. However, it is possible to considerably reduce the cost, and also to improve the positioning accuracy between the respective parts and the arrangement accuracy of the black l16.

The white keys are not shown, but they are black! As in the case of I6, the white key may be integrally molded on the console panel 4 via a thin flexible part, or, for example, as in the case of the second embodiment described later, the white key may be formed as a separate part. key to keyboard chassis
Alternatively, only the white keys may be integrally molded to the console panel 4 via a thin flexible part.
A black key as a separate part may be attached to the wI board chassis l.

Next, FIG. 2 shows the main parts of a keyboard device according to a second embodiment of the present invention. In this figure, parts with the same names as those in FIG.

In the keyboard device of this second embodiment, 111g1 chassis 1
, the lower W case 2 and the console panel 4 are integrally molded from synthetic resin, and the black key 6 and white key 1131 are separate parts. Among these, the black key 6 is mounted on a common mounting plate 32 with a length corresponding to, for example, one octave, and each thin flexible part 33
Five black keys, C#, D#, F#, G#, and A#, are integrally molded via the black key unit, thereby forming a black key unit.

The white w131 is attached to a common mounting plate 34 with a length corresponding to 1 octa-1 minute through thin flexible parts 35 to C and D.
, E, F, G, A, and B are integrally molded to form a white key unit.

When assembling the key unit as described above, first align and place the common mounting plate 32 of the black key unit on the predetermined upper surface of the keyboard chassis l, then place the common mounting plate 32 of the white key unit. 34 are aligned and overlapped on the upper surface of the common mounting plate 32 of the black key unit. In this superimposed state, the black key 6 and white 1I31 for l octa-1 are
are arranged in parallel as expected, and screw insertion holes (not shown) formed in each common mounting plate 32, 34 are aligned with each other. Then, insert the screws 36 into the screw insertion holes that match each other, and screw the inserted screws 36 into the screw holes (not shown) formed in the keyboard chassis l.
A black key 6 and a white key 31 for octa-1 are attached to the keyboard chassis 1.

In this keyboard device, black key 6 and white ll31 are placed on the keyboard chassis! After attaching the console panel 4 to the l11 part of the keyboard chassis l, black W16 and white #f1
The portions of the common mounting plates 32 and 34 of 31 are covered by the console panel 4, so that the appearance can be improved without using a special key blinding member.

In addition, when a push button switch is provided on the console panel 4 of this keyboard device, since the flexible circuit board 23 is arranged on the keyboard chassis l below the console panel 4, the rubber switch can be placed on the upper surface of the flexible circuit board 23. A bar-shaped push button 42 for suppressing the rubber switch 41 is provided on the console panel 4.
A push button switch can be provided on the console panel 4 by arranging it in a guide member 43 provided therein and in an opening 44 formed in the console panel 4 so as to be movable up and down while being prevented from being pulled out. If you do this, this W'll
Since the rubber switch 22 is provided at one end of one flexible circuit board 23 that constitutes the electronic circuit of the device, and the rubber switch 41 is provided at the other end, no special electrical connection member is required, and the circuit The configuration can be simplified.

[Effects of IJJ] - As explained above, according to the invention according to claim 1 or 2, the keyboard chassis and the console panel or the lower case are integrally molded from synthetic resin through the flexible part. Therefore, the number of parts and assembly man-hours are reduced, and costs can be reduced.

Further, according to the third aspect of the invention, the keyboard chassis and the console panel are integrally molded with synthetic resin through the flexible part, and the console panel and the key are integrally molded with the synthetic resin through the flexible part. Since the body is molded from resin, the number of parts and assembly man-hours are significantly reduced, making it possible to significantly reduce costs.

Furthermore, according to the invention as set forth in claim 4, the keyboard chassis, the console panel, and the lower case are each integrally molded with synthetic resin through the flexible portion, and the console panel and the key are connected through the flexible portion.

Since it is integrally molded from synthetic resin, the number of parts and assembly man-hours are further reduced, making it possible to further reduce costs and improving the alignment accuracy between each part and the placement accuracy of the key. can.

! ...Keyboard chassis, 2...Lower case, 3.5.7...11T +a i'FII
, a... Console panel, 6...
・Black key.

Claims (1)

[Scope of Claims] (1) A keyboard device characterized in that a keyboard chassis and a console panel are integrally molded from synthetic resin via a flexible portion. (2) A keyboard device characterized in that the keyboard chassis and the lower case are integrally molded from synthetic resin via a flexible portion. (3) The keyboard chassis and the console panel are integrally molded from synthetic resin through a flexible portion, and the console panel and the key are integrally molded from synthetic resin through the flexible portion. A keyboard device. (4) The keyboard chassis, console panel, and lower case are integrally molded from synthetic resin through flexible parts, and the console panel and the key are integrally molded from synthetic resin through flexible parts. A keyboard device featuring: (5) The keyboard device according to claim 3 or 4, wherein the keys are white keys. (8) The keyboard device according to claim 3 or 4, wherein the keys are black keys. (7) The keyboard device according to claim 3 or 4, wherein the keys are white keys and black keys.