KR20040063108A - A keyboard pad and the manufacturing method therefor - Google Patents

Abstract

PURPOSE: A keyboard pad and a manufacturing method therefor are provided to have fine external appearance as well as an excellent function. CONSTITUTION: A pad original plate is obtained by blending a silicon rubber material and a pigment. A plurality of whole tone keyboard portions and semitone keyboard portions are classified and molded on the surface of the pad original plate by pressing the pad original plate. A silicon ink with the first color is coated on one of the whole tone keyboard portions and the semitone keyboard portions. The first color printing portion is dry. A silicon ink with the second color is coated on the other. The second color printing portion is dry.

Description

Keyboard pad and the manufacturing method therefor {A keyboard pad and the manufacturing method therefor}

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a keyboard pad and a method for producing the same, and more particularly, to a key pad having a superior appearance as well as a beautiful appearance and a method for producing the same.

In more detail, it can also be called invention regarding the upper pad which comprises the said keyboard pad, and its manufacturing method.

Due to the development of the electronic industry, various electronic organs have been developed in the sense of supplementing or eliminating the shortcomings of the piano or organ, which has been representative of heavyweight instruments in the past.

In the field of pure music, the old heavy wooden piano or organ is still recognized for its value, but in the area that emphasizes other hobbies and commercials, the electronic organs have a great advantage of being portable because of their small size and light weight. It has secured an overwhelming advantage.

On the other hand, the human desire for miniaturization and lightening has repeatedly improved or modified electronic organs, and in recent years has come to produce keyboard instruments in the form of scrolls.

The scroll-type portable keyboard musical instrument (hereinafter referred to as a "portable keyboard musical instrument") includes a main body portion including a memory chip to which electronic sounds of various musical instruments including a piano are input, and connected to the main body portion thereof. It is configured to include a flexible keyboard pad engraved with a key on the surface.

In other words, the sound of the scale is ringed from the speaker in the main body part as the key is pressed on the surface of the keyboard pad, and the performance is performed. After the performance is finished, the keyboard is rolled up like a roll. There are possible features.

FIG. 1 is a perspective view showing a general shape of the portable keyboard musical instrument. As described above, a keyboard pad 10 engraved with a conventional piano keyboard, a circuit board (not shown) and an electrical circuit in the keyboard pad 10 are provided. It is configured to include a main body 20 having an electronic device connected therein.

As shown in FIG. 2, the keyboard pad 10 includes an upper pad 11 having respective keys engraved thereon, and a lower pad 13 bonded to each other with a slight space between the upper pad 11 and the upper pad 11. ) And a flexible circuit board 12 accommodated between the upper and lower pads 11 and 13.

On the other hand, the keyboard pad 10 should have enough flexibility to be easily wound, for this purpose it is usually made of silicon rubber (silicon rubber).

Other synthetic resins such as urethane may be considered, but silicone resins are recognized as optimal materials in terms of key functions as keys, including restoration characteristics.

However, there has been a problem to be fundamentally solved when manufacturing the keyboard pad 10 using the silicone rubber as a material.

That is, as a method problem for distinguishing and displaying the on-tone keyboard (a) and the semi-tone keyboard (b) on the upper pad 11 constituting the surface of the keyboard pad 10, a warm tone keyboard (a) which is usually white and The conventional method for expressing the black semitone keyboard (b) in each color is as follows.

First, by mixing a milky white silicone rubber material and an appropriate amount of pigment in a roller mixer, a pad negative disc of a warm tone key index white is produced, and a press process is performed to produce a white primary key pad. A separate piece of black plate is placed on the area of the semitone keyboard, and then placed in a separate, hot mold to heat-bond between the primary keyboard pad and the black plate, ie, fusion of two silicone rubber plates, to produce a white or other warm tone. An example is the case of completing a single keyboard pad in which a keyboard and a black rhythm key are combined.

In order to obtain the pieces of the black plate for the semitone keyboard, it is a matter of course that a separate pigment blending process similar to the process of producing the white pad disc should be involved.

As another method, a method of painting with black ink, paint, or the like on the corresponding portion of the semitone keyboard on the pad disc obtained through the compounding process with the white pigment is mentioned.

According to the fusion method as a first example, there is a problem that the boundary between colors is considerably blurred as mutual mixing occurs while the two-color silicone rubber sheet is welded.

In addition to the boundaries between the colors, the phenomenon that the original vivid color itself due to the mixing is also unavoidable.

According to the painting method as the second example, there is a problem of producing a rough feeling as a color tone mismatch occurs between a white key as a silicone rubber portion and a black key as an ink or paint painted portion.

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and it is an object of the present invention to provide a key pad having a beautiful appearance as well as maintaining an excellent function as a key pad possessed by silicone rubber.

In other words, a key pad having a functional condition to be provided as a pad of a portable keyboard musical instrument, that is, having sufficient flexibility to be easily wound, as well as an overall beautiful appearance, and a method of manufacturing the same.

1 is a perspective view showing a typical portable keyboard musical instrument,

2 is a perspective view showing a keyboard pad constituting the keyboard musical instrument;

3 is a perspective view showing a keyboard pad of an embodiment of the present invention;

4 is a cross-sectional view showing a keyboard pad manufacturing method of an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10, 20: keyboard pad 11, 21: upper pad

12, 22: flexible circuit board 12, 22: lower pad

A: 1st color printing part B: 2nd color printing part

In order to achieve the above object, the key pad of the present invention is a key pad including the upper pad, the lower pad, and the flexible circuit board having the structure described above, wherein the first pad is formed on the surface of the upper pad. The entire keyboard arrangement is characterized by the silicon ink printing section and the second color silicon ink printing section.

The first color silicon ink printing portion represents an ontone keyboard and the second color silicon ink printing portion represents a semitone keyboard, respectively, and the respective colors are not particularly limited to white or black.

Further, a method for manufacturing a keyboard pad according to the present invention comprising the upper pad having an overall keyboard arrangement composed of a first color silicon ink printing portion and a second color silicon ink printing portion on its surface is provided. In the step, by pressing the pad disc obtained by the blending of the silicone rubber material and the pigment, the diatonic and semitone keyboard portions are separately molded on the surface thereof, and then the first color and the semitone keyboard portions are formed in the first color and the semitone keyboard portions. There is a feature comprising the step of applying two colors of silicone ink separately.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A key pad according to an embodiment of the present invention and a manufacturing method thereof will be described in detail with reference to the accompanying drawings.

FIG. 3 is a perspective view showing a keyboard pad according to the present invention, which is similar in appearance to the conventional keyboard pad of FIG. 2 in that it has a recording arrangement composed of a whole tone keyboard and a semitone keyboard.

However, in the present invention, since the whole tone keyboard and the semitone keyboard are formed of two color silicon ink printing portions, the first color silicon ink printing portion A is made on the same appearance as that of FIG. And each keyboard portion in the form of the second color silicon ink printing portion (B).

That is, according to the present invention, the upper pad 21 having each key engraved thereon, the lower pad 23 bonded to each other with a little space between the upper pad 21, and these upper and lower pads In the keyboard pad 20 including a flexible circuit board 23 accommodated between (21, 23), the first color silicon ink printing portion (A) formed on the surface of the upper pad 21 and The overall keyboard arrangement is constituted by the second color silicon ink printing section B. FIG.

As mentioned above, these first color silicon ink printing portions A and second color silicon ink printing portions B are formed by separately applying, i.e., printing two colors of silicone ink onto the surface of the silicon disc. .

In this way, by applying a silicon ink other than the usual ink on the surface of the silicon disc, it is possible to obtain the sufficient flexibility as a keyboard pad and to make the most of the material properties of the silicone rubber having a slight glossiness. The upper pad of the beautiful appearance which is flexible enough to be wound up and a moderate glossiness, and also the keyboard pad of this invention comprised this upper pad is completed.

In other words, at least in terms of color clarity or overall aesthetics, it was found to be remarkably superior to the conventional keyboard pad described above.

On the other hand, it is preferable that the first color and the second color be white and black as the same as the keyboard arrangement structure on a general keyboard musical instrument, but may be other colors as necessary.

Subsequently, the method for manufacturing a keyboard pad according to the embodiment of the present invention will be described with reference to the process diagram of FIG. 4, the steps of manufacturing the upper pad, the lower pad, and the flexible circuit board, respectively, and the flexible circuit board in the space between the upper pad and the lower pad. In the key pad manufacturing method comprising the step of joining these upper pads and lower pads in a immersed state, the upper pad manufacturing step is a step of obtaining a pad disc by blending a silicone rubber material and pigment, and the pad Pressing a disc to form a plurality of diatonic keys and semicircle keyboard portions on the surface thereof, applying a silicon ink of a first color to one of the diatonic keyboard portions or the semitone keyboard portions, and placing them in a drying furnace. Drying the first color printing unit and applying a second color silicone ink to the remaining one portion of the keyboard; And drying the second color printing unit in the drying furnace again.

As the printing method, it is safe to use ordinary screen printing, and it is preferable to use commercially available silicone ink as the ink.

Considering the affinity and overall aesthetics of the pad disc surface of the silicon material, the silicon ink containing the same raw material was found to be optimal rather than other inks or paints.

In addition, in drying the said 1st or 2nd color printing part, what is necessary is just to pass the inside of a drying furnace which has an internal temperature of about 200 degreeC for about 5 minutes.

On the other hand, the present invention is not only put the point in the manufacturing process of the upper pad in the manufacture of the keyboard pad for portable keyboard instruments, but also the manufacturing process of the lower pad and the flexible circuit board is the same as the conventional, Detailed description will be omitted.

The keyboard pad of the present invention and its manufacturing method have been described in detail above based on the illustrated embodiment, but the overall keyboard arrangement is constructed by painting silicon inks of different colors on the upper pad surface of the keyboard pad. It is to be understood that minor changes or modifications, which are based on the basic intention, also fall within the technical scope of the present invention.

As described above, according to the present invention, a key pad having a beautiful appearance as well as maintaining an excellent function as a key pad possessed by a silicone rubber can be obtained.

As mentioned at the outset, given the trend toward miniaturization and lightweighting throughout the industry, at least in the field of realizing various colors on silicon plates, it is worth referring to the silicon ink painting methods mentioned herein. It is considered that there is enough.

Claims (3)

Between the upper pad 21 in which each key is engraved, the lower pad 23 bonded to each other with a little space between the upper pad 21, and between these upper and lower pads 21 and 23. In the keyboard pad 20 comprising a flexible circuit board 22 accommodated, Key pad (20) characterized in that the overall keyboard arrangement is configured by the first color silicon ink printing portion (A) and the second color silicon ink printing portion (B) applied and formed on the surface of the upper pad (21). Manufacturing the upper pad 21, the lower pad 23, and the flexible circuit board 23, respectively, and inserting the flexible circuit board 22 into the space between the upper pad 21 and the lower pad 23. In the key pad manufacturing method comprising the step of bonding these upper pads 21 and lower pads 23, The step of preparing the upper pad 21 includes the steps of obtaining a pad disc by blending a silicone rubber material and a pigment, and separately forming a plurality of warm sound keys and semicircle key portions on the surface by pressing the pad disc. Applying a silicon ink of a first color to either one of the whole-tone keyboard part or the half-tone keyboard part, and putting it in a drying furnace to dry the first color printing part, and the second ink of the second color to the other keyboard part. And applying a step of drying, and drying the second color printing unit in the drying furnace. 3. The method of claim 2, wherein said drying step is accomplished by passing through an interior of a drying furnace having an internal temperature of about 200 < 0 > C.