KR20060112054A - A fabrication method of key-pad - Google Patents

Abstract

A fabrication method of a key-pad is provided to remarkably reduce the number of operation processes by marking a number and a letter of the key-pad as processing the number and letter in a button shape. A fabrication method of a key-pad includes the following steps of: processing a number or a letter in a button shape as marking the number or letter on the board through one of press, etching, and laser methods(S100); multi-coating the processed board to show a variety of colors according to a view angle(S200); forming the number and letter on a silicon pad(S400); and attaching the silicon pad to a rear side of the board(S500).

Description

Keypad manufacturing method {A fabrication method of Key-pad}

1 is a schematic process flow diagram of a conventional keypad manufacturing method.

Figure 2 is a plan view showing a schematic configuration of a conventional keypad.

Figure 3 is a schematic process flow diagram of a keypad manufacturing method according to the present invention.

Figure 4 is a schematic plan view of a keypad for a mobile phone manufactured by the keypad manufacturing method according to the present invention.

5 is a schematic plan view of a keypad for a notebook manufactured by the keypad manufacturing method according to the present invention.

Figure 6 is a state showing a state in which the plate and the silicon pad is manufactured by the keypad manufacturing method according to the present invention.

7 is a cross-sectional view of a keypad manufactured by the keypad manufacturing method according to the present invention.

Explanation of symbols on the main parts of the drawings

100. Plate 120. Button

140. Cutting part 200.Silicone pad

220. Print film 240. EL sheet

260. Metal foil 300. Keypad

S100. Button forming step S200. Multi coating step

S300. Surface coating step S400. Silicone Pad Molding Step

S500. Silicon Pad Attachment Step

The present invention relates to a manufacturing method, and more particularly, a keypad for attaching a silicone pad formed by processing numbers, letters, and button shapes on a metal or plastic sheet and multi-coating and processing numbers and letters on the back of the sheet. It relates to a manufacturing method.

In general, an information terminal refers to a mobile phone, a PDA, an electronic notebook, a notebook, and the like used in a general home or office, and can be easily carried and used.

All of the information terminals have a key pad as a switch device for signal generation, and the keypad is inserted into a hole provided in the housing while being located on a printed circuit board having a contact, so that a part of the button is moved out of the housing. Assembled in a protruding structure.

A dome switch having elasticity and a restoring force is positioned between the keypad and the printed circuit board. The dome switch generates a signal by contacting a contact provided on the printed circuit board for operation of a button constituting the keypad. It is supposed to be.

On the other hand, the keypad has been proposed to meet the functional aspect according to the shape of the information terminal and the design aspect according to the taste or pattern of the consumer, these are generally a relatively small size of the buttons of the keypad It is a situation that is made very precisely by being made.

Figure 1 shows a schematic process flow diagram of a conventional keypad manufacturing method, Figure 2 shows a schematic configuration of a conventional keypad in a plan view.

As shown in these figures, first, the injection molding step (S10) of molding an injection molded article having each button shape through a mold corresponding to each button 2 of the keypad 1 is performed. After the injection molding step S10, the button 2 of the injection molded product is cut as a separate punching device, and each rib 2, which connects each button 2, is cut into one independent button ( 2) to go through the rib cutting step (S20) to form.

In addition, a coating step of applying a color to the surface of the button 2 by fixing each of the buttons 2 cut in this way to a jig (not shown) in which a key groove is formed in the same way as the keypad 1 arrangement ( S30 is performed, and after the painting step S30 is performed, a coating for preventing scratches and imprinting of each plated button 2 and emitting light on the surface of the button 2 is performed. Coating) surface coating step (S40) is carried out.

Subsequently, a marking step S50 for marking the button 2 by marking numbers and letters on the upper surface of the button 2 with a laser is performed, and the marking step S50 is performed. After the end of the button attaching step (S60) proceeds to apply the adhesive to each button 2 to the silicone pad (not shown) made to meet the specifications of the keypad (1).

The button attaching step S60 is a process of attaching each of the 22 to 23 buttons 2 constituting the keypad 1 to the silicon pad one by one, and after the button attaching step S60 is finished, In order to prevent the removal of the button 2 attached to the silicon pad, a fusion step (S70) of fusion is performed with a fusion machine (not shown), thereby completing the manufacturing method of the keypad 1.

However, in manufacturing the keypad 1 as described above, the keypad in the prior art by molding the number and function buttons into an injection molded product using an injection molding method, and then cutting the buttons 2 one by one one by one. Since manufacturing (1) produces not only the manufacturability and productivity notably remarkably but also the defect rate of the keypad 1 becomes high.

In addition, in the related art, the structural problems of the injection molded article, that is, the corresponding button 2 must be molded by using a plurality of molds according to each button shape, respectively, not only increases the manufacturing cost but also the button 2 is informed. The thickness of the information terminal is increased by being protruded into the housing of the terminal, and the ribs 3 connecting the button 2 and the button 2 are narrowly and narrowly formed so that they are easily broken or distorted during manufacturing or handling. There is this.

In addition, the keypad 1 made of silicone rubber among the conventional keypads is not mechanically stable due to bending due to the characteristics of the silicone material, and numbers or letters printed on the surface of the button 2 are painted when used for a long time. In addition to peeling off, there is a problem that the discernment is slowed down due to discoloration and scratches.

Therefore, an object of the present invention for solving the above problems, the multi-coating by processing the numbers and letters and button shapes on the metal or plastic sheet material and attaching the silicone pad formed by processing the numbers and letters on the back of the plate To provide a keypad manufacturing method.

Keypad manufacturing method according to the present invention for achieving the above object comprises a button forming step of processing into a button shape while displaying numbers and letters on the plate using any one method of pressing, etching, laser; A multi-coating step of coating a plurality of layers so that colors appear according to the viewing angle on the plate which has undergone the button forming step; A silicon pad molding step of processing numbers and letters on the silicon pad; And a silicon pad attaching step of attaching the silicon pad undergoing the silicon pad molding step to the back surface of the plate subjected to the multi-coating step.

The multi-coating step is characterized in that the coating of silicon dioxide (SiO ₂ ) and titanium dioxide (TiO ₂ ) alternately in a vacuum.

Titanium dioxide (TiO ₂ ) of the multi-coating step is characterized in that the fluorine (F) is further coated to protect the multi-coating layer.

After the multi-coating step, a surface coating step of coating a UV or urethane on the surface of the plate to protect the multi-coating layer of the plate is characterized in that it is added.

The silicon pad of the silicon pad molding step is characterized in that the printing film is provided so that various colors can be displayed.

The silicon pad of the silicon pad forming step is characterized in that the EL (Electro Luminescence) sheet of the thin film for emitting light is provided.

The silicon pad of the silicon pad molding step is characterized in that the metal sheet is provided to block the electromagnetic waves.

The button forming step is characterized by cutting the remaining three surfaces except for one surface of the four surfaces constituting the button.

The plate member in the button forming step is characterized in that made of metal or plastic.

According to the present invention having such a configuration, there is an advantage that the thickness of the keypad becomes thin and the design is gorgeous.

Hereinafter, a preferred embodiment of the keypad manufacturing method according to the present invention as described above will be described in detail with reference to the accompanying drawings.

Figure 3 shows a schematic process flow diagram of a keypad manufacturing method according to the present invention, Figure 4 shows a schematic plan view of a portable keypad manufactured by the keypad manufacturing method according to the present invention.

And, Figure 5 is a schematic plan view of a keypad for a notebook manufactured by the keypad manufacturing method according to the present invention is shown, Figure 6 shows a state in which the plate and silicon pad manufactured by the keypad manufacturing method according to the present invention is combined. A state diagram is shown and FIG. 7 is a cross-sectional view of a keypad manufactured by the keypad manufacturing method according to the present invention.

As shown in these drawings, the keypad manufacturing method according to the present invention is any one of a method of pressing, etching, laser on the plate 100 having a thickness of about 0.1cm ~ 0.3cm. Starting from the button forming step (S100) for processing into a button shape while displaying the numbers and letters, etc. integrally using.

The method of using a press in the button forming step (S100) is to produce a mold engraved with the numbers and letters and buttons 120 displayed on the plate 100 and produced by punching them continuously as a high-speed press (Punching) The method of using etching means a method of corroding the plate 100 with a number and letters displayed on the plate 100 and a line in the shape of a button 120 as a chemical that can corrode the plate 100. The method of using a laser is a flat plate 100 by inputting and commanding the numbers and letters of the plate 100 and the dimensions of the button 120 shape as coordinate values to a laser machine (not shown). Refers to a method for forming a cutting line in the.

The plate 100 in the button forming step (S100) may use a flat plate 100 made of any one material of metal or plastic, and in the button forming step (S100) of the plate 100 By cutting the three surfaces except for one surface of the four surfaces constituting the button 120 (cutting) to form a cutting unit 140, as shown in Figs. 4 and 5, the button 120 having various functions is integrated. Is formed.

After the button forming step (S100) is progressed, the multi-coating step (S200) to display the number and letters, etc. and coating in several layers so that the color appears in accordance with the viewing angle on the plate 100, the button 120 is formed Proceed.

The multi-coating step (S200) is a method of plating colors in a vacuum state, and may be referred to as multi-layer coating by coating with several layers, and is deposited on the surface of the plate material 100 using various colors as desired. Is performed.

For example, multi-coating layers can be formed by vacuum evaporation of silicon dioxide (SiO ₂ ) and titanium dioxide (TiO ₂ ) in very thin layers of 27 layers alternately to produce two colors (red and blue), and finally fluorine By further vacuum-depositing (F), the above-described effects can be produced, and the surface coating step (S300) performed for the surface protection described below can be omitted.

Therefore, the multi-coating layer is a color change depending on the angle of light is to produce two or more colors to be able to not only make the surface of the plate 100 gorgeous but also luxury.

In addition, titanium dioxide (TiO ₂ ) of the material added in the multi-coating step (S200) is a photocatalytic reaction that causes a catalytic reaction upon receiving light, thereby acting to change various pollutants into harmless materials, thereby contaminating As well as the prevention effect, the air purification effect, sterilization effect, odor removal effect, etc. will appear incidentally.

After the multi-coating step (S200) is in progress, the surface of the plate 100 to coat the UV (Ultra Violet) or urethane (Urethane) to protect the multi-coating layer of the plate 100 according to the order of the consumer Coating step (S300) may be added.

That is, the UV coating is a method of coating a coating material using a coating cured in a short time by irradiation of ultraviolet rays, and the urethane coating is a surface of the plate 100 with polyurethane (Poly Urethane). In the coating method and curing using the thermal energy, the surface coating step (S300) made of this method is to protect the multi-coating layer of the multi-coating step (S200) and smooth the surface of the plate 100 as well as the plate ( In order to prevent the occurrence of scratches or stamps on the surface of the 100).

After the process as described above, the silicon pad molding step (S400) of integrally processing numbers and letters on the silicon pad 200 attached to the back of the plate 100 is in progress. The silicon pad molding step (S400) is to precisely fit the numbers and letters formed on the plate 100 using a mold on the silicon pad 200 of the size corresponding to the size of the plate 100 to match the position. Processing step.

The silicon pad 200 in the silicon pad molding step S400 is provided with a print film 220 to display various colors on the plate 100, and under the print film 220. EL (Electro Luminescence) sheet 240 of the thin film for emitting light is provided.

Therefore, when the EL sheet 240 emits light, the light passing through the printing film 220 passes through the cut portion 140 and the button of the plate 100 according to the color of the printing film 220. The light is displayed to the outside through the numerals and letters of 120, so as to facilitate the use of the keypad 300 at night or in a dark place, the appearance of the keypad 300 is more colorful.

In addition, a lower portion of the silicon pad 200 is further provided with a metal thin plate 260 that is generated from a printed circuit board (not shown) to block the electromagnetic waves harmful to the human body. The metal thin plate 260 may be used as long as it can block electromagnetic waves generated from the printed circuit board. However, the metal thin plate 260 uses a lot of stainless steel (SUS).

Here, between the silicon pad 200 and the print film 220, between the print film 220 and EL sheet 240, between the EL sheet 240 and the silicon pad 200 and the silicon pad Primers (not shown) are applied between the 200 and the metal thin plate 260.

The primer is a kind of adhesive for strengthening the adhesion between the components made of different materials, such as the printing film 220, EL sheets 240, metal thin plate 260, such as heterogeneous materials It is to serve to strengthen the bonding force inside and outside the silicon pad 200 is provided with the component.

After the silicon pad forming step S400 is performed, the plate 100 having undergone the multi-coating step S200 or the surface coating step S300 and the silicon pad 200 having the silicon pad forming step S400 are attached. The silicon pad attaching step S500 is performed.

Therefore, as shown in FIG. 7, when the silicon pad 200 having the metal thin plate 260, the EL sheet 240, and the printing film 220 is attached to the back surface of the plate 100, a mobile phone or The keypad 300 of the information terminal such as a notebook, a PDA, an electronic notebook is completed, and the keypad manufacturing method according to the present invention is completed.

The scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention may be made by those skilled in the art within the above technical scope.

As described in detail above, in the method for manufacturing a keypad according to the present invention, a silicon pad formed by processing numbers, letters, and buttons on a metal or plastic sheet is multi-coated and processed by numbers and letters, and is attached to the back of the sheet. .

Therefore, in the prior art, the process of molding the number and function buttons into an injection molded product by injection molding and then cutting the buttons one by one is manufactured by manufacturing the plate integrally by pressing, etching, or laser. And the effect that the productivity can be significantly improved is expected.

In addition, by processing the button shape integrally while displaying the numbers and letters of the keypad, the work process is significantly reduced compared to the conventional keypad manufacturing process is expected to reduce the manufacturing cost.

In addition, since the buttons of the keypad are flat, the thickness of the information terminal becomes thinner than the conventional button protrusion type, and light passes through the cutting part, numbers, and letters of the keypad to facilitate the use of the information terminal at night or in the dark. The effect is expected.

In addition, by multi-coating the surface of the keypad, the color of the keypad changes color depending on the angle of light, the design is gorgeous, and the surface coating with UV or urethane to protect the multi-coating layer, such as stamping or scratching This prevents the appearance of the keypad to be smoother.

Claims (9)

A button forming step of processing a button shape while displaying numbers and letters on a plate by using any one method of pressing, etching, and laser; A multi-coating step of coating a plurality of layers so that colors appear according to the viewing angle on the plate which has undergone the button forming step; A silicon pad molding step of processing numbers and letters on the silicon pad; And a silicon pad attaching step of attaching the silicon pad subjected to the silicon pad molding step to the back surface of the plate which has been subjected to the multi-coating step. The method of claim 1, wherein the multi-coating step includes coating silicon dioxide (SiO ₂ ) and titanium dioxide (TiO ₂ ) alternately in a vacuum. The method of claim 2, wherein the titanium dioxide (TiO ₂ ) of the multi-coating step is further coated with fluorine (F) to protect the multi-coating layer. According to claim 1, After the multi-coating step, Keypad manufacturing method characterized in that the surface coating step of coating a UV (UV) or urethane on the surface of the plate to protect the multi-coating layer of the plate. The method of claim 1, wherein the silicon pad forming step comprises a printing film for displaying various colors. The method of claim 1, wherein the silicon pad of the silicon pad forming step is provided with an EL (Electro Luminescence) sheet having a thin film to emit light. The method of claim 1, wherein the silicon pad forming step of the silicon pad is characterized in that the keypad is provided with a metal foil to block the electromagnetic waves. The keypad manufacturing method of claim 1, wherein the button forming step cuts the remaining three surfaces except for one surface among the four surfaces forming the button. The keypad manufacturing method of claim 1, wherein the plate member in the button forming step is made of metal or plastic.

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