KR100458433B1 - Structure for keypad of mobile and manufacturing method thereof - Google Patents

Abstract

Disclosed are a key button structure of a mobile phone and a method for manufacturing the same.

According to the present invention, a key button structure mounted on the front panel of a mobile phone, comprising: a key injection material of acrylic material holding the key button; A protruding layer for printing a protruding logo of an opaque color corresponding to a unique number of a corresponding key button to an upper side of the key injection product; A shield for blocking the light source transmission to a portion which is printed on the rear surface of the key injection product corresponding to the projected logo, and in which the inverted logo set to be larger than the size of the projected logo and the inverted character for displaying the characters of the key button are excluded. layer; And a diffusing layer for providing a translucent color of the inverted character and diffusing the color of the inverted logo, printed between the shielding layer and the back side of the key injection product on the back side of the key injection product corresponding to the protruding logo, An inverted logo set to be larger than the size of the logo and a background layer for providing a background color for the character of the key button may be further included.

The present invention having such a configuration, the mold injection of a large number of key injections with a flat plate of transparent acrylic material, and at this time to print the protrusion logo corresponding to the number of the keypad on the upper side of each key button, and corresponds to the protrusion logo Form the inverted logo and inverted letters to the back position of the key button, and induce the background color of the key button to the remaining parts except the inverted logo and the inverted letters, and simultaneously print the background layer and the shielding layer to block the light source. Print a diffusion layer to diffuse the colors of the inverted letters and the inverted logo, but enlarge the inverted logo by about 0.2mm compared to the protruding logo, and the protruding logo is reflected by the light source of the light emitting diode or inorganic EL which is turned on when using the mobile phone. Display in three-dimensional shape makes it easy to operate the keypad regardless of the ambient illuminance, highlighting the beauty of the mobile phone It provides the effect of upgrading the visual image of the mobile phone design pattern.

Description

Key button structure of mobile phone and method for manufacturing same {STRUCTURE FOR KEYPAD OF MOBILE AND MANUFACTURING METHOD THEREOF}

The present invention relates to a mobile phone keypad, and more particularly, a key button structure of a mobile phone that can increase the visual effect of the mobile phone design pattern by allowing a number or letter printed on the front of the mobile phone keypad to be displayed in three dimensions when the pilot lamp is turned on. And to a method for producing the same.

In general, the keypad is used as a switch device for signal generation by using a communication device such as a mobile phone, and the switch device has a key printed with numbers or letters, and the key is provided in a hole provided in the front housing of the communication device. And part of which is assembled into the structure protruding outside the front housing.

The key constituting the keypad is formed with a printed surface on which numbers or letters are displayed as described above, and checks the numbers or characters displayed on the printed surface and presses a desired key. A light source made up of LEDs is installed outside the bottom of the key so that the printed surface can be checked at night, and when the light is irradiated from the light source, the user can recognize the number printed on the key by the backlighting effect. .

1 shows a keypad used in a conventional mobile phone, the key 101 constituting the keypad of the mobile phone is a base 107, a key top 105 protruding upward from the base 107, It has the protrusion 113 formed in the center part of the bottom face of this key top 105. As shown in FIG. The base 107 and the key top 105 is connected to the connection portion 121 is formed integrally, the connection portion 121 to have a thickness thinner than the base 107 to facilitate the operation of the key 101. The upper surface of the key top 105 is formed with a printed surface 103 in which numbers or letters are engraved using a silk screen printing or laser marking machine.

And the bottom of the base 107 is provided with a groove 109 of a constant size, the groove 109 is located on the printed circuit board 119 LED 111 is located even when using a mobile phone in a dark place The printing surface 103 can be confirmed by the user. A dome switch 117 having a predetermined elastic force is positioned below the protrusion 113, and a fixed contact 115 protruding from the dome switch 117 is formed on the printed circuit board 119. This is located.

When the keypad opens a folder or flip of a mobile phone (not shown) in order to use the mobile phone, power is applied to the LED 111 to provide backlighting to the keypad while emitting light, so that the printing surface 103 formed on the key top 105 even in a dark place. ) Can be seen. After using the mobile phone, if the folder or flip is closed, the power applied to the LED 111 is cut off and backlighting is stopped.

The backlighting of the mobile phone is not only a functional means but also an important factor in determining the aesthetics of the mobile phone. In recent years, the surface of the keypad is designed to satisfy various design taste patterns and visual effects of users while increasing the added value of the keypad. Keypads with so-called plating keys are applied to products that are coated with metal or metal-based materials.

However, such a conventional keypad has been developed with a focus on a design that can emphasize the beauty of the appearance, so that the functional problem that the printed surface is not clearly seen because the illuminance generated from the LED is not maintained as it is. Is being discovered.

The present invention has been made to solve the above problems, and an object of the present invention is to display the characters on the printed surface in three dimensions when the backlight of the mobile phone keypad, so that the user can easily operate the keypad at night, and also the appearance of the mobile phone It is to provide a key button structure of a mobile phone and a method for manufacturing the same that can maximize the added value of the product by emphasizing the beauty of.

1 is a cross-sectional view showing a keypad of a conventional mobile phone.

2 is a perspective view showing a key injection product of the mobile phone keypad according to the present invention.

3 is a flowchart illustrating a printing method of a key button according to the present invention.

4 is a configuration diagram illustrating a printing method according to FIG. 3 for each layer.

FIG. 5 is a cross-sectional view illustrating a print layer for each layer of FIG. 4.

<Description of Symbols for Main Drawings>

200: key injection 201: frame

203: rib 205: key button

401: protruding layer 402: background layer 403: first shielding layer 405: second shielding layer 407: third shielding layer 409: diffusion layer 411: protruding logo 413: inverted logo 415: shielded layer 417: inverted letter a: gap

Key button structure of a mobile phone according to the first aspect of the present invention for achieving the above object, the key injection material of acrylic material holding the key button; A protruding layer for printing a protruding logo of an opaque color corresponding to a unique number of a corresponding key button to an upper side of the key injection product; A shield for blocking the light source transmission to a portion which is printed on the rear surface of the key injection product corresponding to the projected logo, and in which the inverted logo set to be larger than the size of the projected logo and the inverted character for displaying the characters of the key button are excluded. layer; And a diffusion layer for providing a translucent color of the inverted character and diffusing the color of the inverted logo, wherein the acrylic material is any one of polycarbonate, acrylic, and ABS, and has a light transmittance. Maintain 85% to 91%.

Preferably, between the shielding layer and the back surface of the key ejection printed on the back surface of the key injection corresponding to the projected logo, to provide a background color for the character of the key button and the reverse logo set to be larger than the size of the projected logo The acrylic material may be any one of polycarbonate, acrylic, and ABS, and has a light transmittance of 85% to 91%. do.

In addition, the inverted logo is characterized in that less than 0.2mm tolerance in the figure amplified 0.2mm than the size of the protruding logo.

In addition, the shielding layer is characterized in that the shielding layer is a print layer made of silver pigment, or a printing layer in which more than 10% of the mir ink is mixed with a general color pigment.

The shielding layer may include a first shielding layer for printing a color of a white system, a second shielding layer for printing a color of a black system to an upper end of the first shielding layer, and a white system to an upper end of the second shielding layer. And a third shielding layer for printing color.

In addition, the shielding layer is characterized by consisting of a first shielding layer for printing the color of the gray system and a second shielding layer for printing the color of the black system to the top of the first shielding layer.

Logo printing method of a mobile phone key button according to a second aspect of the present invention for achieving the above object, a) of the opaque color corresponding to the unique number of the key button on the upper side of the key injection holding the key button Printing an extruded logo; b) shielding for blocking the light source transmission to a portion excluding the inverted logo set to be larger than the size of the projected logo to the rear position of the key injection product corresponding to the projected logo and the inverted character for displaying the characters of the key button; Printing a layer; c) printing a diffusion layer for providing a translucent color of the inverted character and diffusing the color of the inverted logo; and d) a drying step of completely curing the printed state of the key button using ultraviolet (UV) light. Characterized in that.

Preferred embodiments of the present invention having such features will be described in detail with reference to the accompanying drawings. 2 illustrates a key injection product 200 made of polycarbonate, acrylic, ABS, etc., injected into a key mold of a mobile phone on an acrylic flat panel having a predetermined shape. The key injection material 200 is a general acrylic material having a thickness of 1 mm and preferably no deformation due to heat resistance (-40 ° C. to 135 ° C.), and maintains a light transmittance of 85% to 91%, and is used for silk screen printing. Make it possible. In particular, the key injection product 200 used in the present invention allows the rear gate portion to remain flat without irregularities, so that the refractive index of the light source is low.

The key injection product 200 is integrated by connecting a frame 201 having a predetermined shape to accommodate a plurality of key buttons 205 used in a mobile phone, and the frame 201 and the plurality of key buttons 205. Ribs 203 for each key button 205 for forming the injection mold are formed. In addition, the key injection 200 has an injection mold process that can be mass produced on a flat acrylic panel.

3 is a flow chart for explaining the printing process to the key injection in accordance with the present invention. 4 is a configuration diagram for explaining a printing layer painted on a key injection product. First, in step S301, a mold injection of a flat acrylic material such as polycarbonate, ABS resin, and acrylic resin of transparent material is performed based on a mold according to the key shape of the mobile phone. At this time, the flat acrylic material is a transparent material, so that the light transmittance of 85% ~ 91% is maintained, and a general-purpose acrylic material or polycarbonate without deformation with heat resistance of -40 ℃ ~ 135 ℃ is preferred.

As such, a large amount of the key injection product 200 injected into the mold is seated with a silk screen jig (JIG), and fixedly installed with each other with a minimum error. The key injection product 200 fixed with each installation is mounted on another jig (JIG). Is fixed without flow.

Each of the film work and the engraving process for the logo and the letter to be printed with the large amount of the key injection 200 is performed. The film work is a film designed for each layer printed on the top surface and the back surface of the key injection product 200, and performs each engraving process through the film for each layer. That is, as shown in FIG. 4, each plate making process for printing the shielding layer 415 to the back surface of the protruding logo 411 and the back of the key button 205 is performed. First, a film is prepared based on a predetermined design, that is, the design of the protruding logo 411 and the separation process for each layer for each predetermined color for forming the shielding layer 415.

The engraving process uses polyester mesh, nylon mesh and sus mesh for 300-350 neck or more for the accuracy of the printed logo, and then applies an emulsion onto the mesh, followed by drying. The film is placed on the dried mesh and scanned with ultraviolet (U.V.) rays to remove the graphic shapes corresponding to the graphics and logos for each layer. Each screen thus manufactured is subjected to film removal by spraying high pressure water through a spray gun. Therefore, graphics formed for each layer are generated in inverted form on each screen.

When the plate making operation is completed as described above, the process proceeds to step S303 to seat the film on the upper side of the key injection product 200, and then prints the protruding logo 411 for each of the key buttons 205 corresponding to the design of the film. do. In addition, the background layer 402 is printed through the step S304 and the film is seated on the bottom surface of the key injection product 200 through the steps S315 and S311, and then the shielding layer 415 and the diffusion layer corresponding to the design of the film ( 409).

Wherein the shielding layer 415 is to block the light source of the light emitting diode (LED) or the organic EL mounted on the bottom of the keypad, it is possible to print a silver color pigment or chrome pigment to a predetermined thickness, if necessary, white color After printing the first shielding layer 403 (S305) and the second shielding layer 405 of the black color (S307) and the third shielding layer 407 of the white color (S309) by printing the light source Can increase the efficiency. Of course, each shielding layer may use a color other than the above-described color, even if a single or two or more colors overlapping shielding layer formed by a black color or a gray color can be obtained the effect of the present invention, of course. . In addition, the shielding layer 415 may be printed with a predetermined thickness by mixing a general color pigment and a mir ink.

On the other hand, the shielding layer 415 has a subsidiary function to make the background color of the key button 205 by substituting the background layer 402 of the key button 205, and the protruding layer 401 Protrudes to the light source to the logo 411. That is, the protruding logo 411 and the inverted logo shape are printed to each shielding layer at a position corresponding to the protruding logo 411. This is to shield the remaining portion except for the inverted logo 413, a part of the light source provided from the light emitting diode (LED) or the organic EL is passed through the inverted logo 413 of the shielding layer 415 ( 411). Here, the inverted logo 413 is configured to have a shape enlarged by about 0.2mm than the size of the protruding logo 411, but has an error range of less than 0.2mm, and the ground color printing by the shielding layer 415 is for light blocking effect. Silk screen printing with solvent ink is preferred.

Through this process, each number corresponding to the keypad on the upper side of the key injection product 200 is printed with the protruding logo 411 of the opaque color, and each corresponding to the keypad on the bottom surface of the key injection product 200 The background color is printed except for the inverted character 417 and the inverted logo 413 including the characters and symbols of.

Thereafter, the inverted characters 417 and the inverted logo 413 formed on the bottom surface of the key injection product 200 are printed with colors for displaying each logo to the position shown. This allows a three-dimensional effect to be obtained by the inverted logo 413 of the diffusion layer 409 which prints the protruding logo 411 on the back side. That is, as shown in FIG. 5, after the protruding logo 411 is printed on the upper side of the key button 205, the background layer 402 and the plurality of shielding layers 415 are formed on the back of the key button 205. ), But each shielding layer 415 excludes the inversion logo 413 and the inversion character 417. The inversion logo 413 and the protrusion logo 411 amplify the shape of the inversion logo 413 to have a gap a of about 0.2 mm. Thereafter, the inversion logo 413 prints the diffusion layer 409 so as to visually diffuse through light divergence. The diffusion layer 409 is capable of silk printing including diffusion ink, and in order to manufacture a rubber base (not shown) for fixing and bonding each key button 205 as necessary, a fluorescent pigment with rubber material Since the phosphorus diffusion ink is chemically mixed to produce a fluorescent effect, printing of the diffusion layer 409 may be omitted.

On the other hand, the diffusion layer 409 corresponding to the inverted character 417, the printing process of the predetermined color to the position corresponding to the inverted character 417 in order to have a predetermined color to end the printing process.

Thereafter, the rib of the key injection product 200 is cut. Cutting is laser cutting using a predetermined jig, and using this laser cutting machine can remove the foreign material layer more completely while minimizing damage to the key. Then, a predetermined amount of adhesive is discharged onto each rear surface of the key button 205 through an adhesive discharging device, and a pre-fabricated silicon or film insert base (not shown) is manufactured through a keypad manufacturing process, which is a separate process. The assembling step of adhering to the key button 205 is performed.

The key button 205 completed through the printing process performs a complete curing drying through UV scanning for UV coating on the upper side and the rear side of the coverton 205 in step S313. At this time, the drying condition is preferably 65 ℃ / 1 minute, through the drying conditions, the pattern printed on the upper side and the back of the key button 205 is not erased, so as not to scratch.

In the structure of the mobile phone key configured as described above, the light emitting diode (LED) or the light source of the organic EL, which are turned on when the mobile phone is operated, is scanned into the shielding layer 415 through the diffusion layer 409 or the base including the diffusion ink. . The light source penetrating the shielding layer 415 is scanned into the protruding logo 411 through the key button 205 made of acrylic material, and a part of the light source is reflected by the protruding logo 411 to reflect the inverted logo 413. Again, diffuse reflection occurs. As a result, the brightness of the inverted logo 413 is increased and the contrast with the protruding logo 411 is enhanced to generate an optical illusion in which the protruding logo 411 protrudes a predetermined value.

As described above, the key button structure of the mobile phone according to the present invention and a method for manufacturing the same are just one embodiment, and the present invention is not limited to the above-described embodiment, as claimed in the following claims. Without departing from the gist of the present invention, anyone of ordinary skill in the art will have the technical spirit of the present invention to the extent that various modifications can be made.

As described above, the mold injection of a large number of key injections with a flat plate made of a transparent acrylic material, and at this time to print the protrusion logo corresponding to the number of the keypad on the upper side of each key button, the key button corresponding to the protrusion logo Form a reverse logo and inverted letters to the rear position of, induce the background color of the key button to the remaining parts except the inverted logo and inverted letters, and at the same time print a background layer and a shielding layer to block the light source, Print a diffusion layer to diffuse the color of the inverted logo, but enlarge the inverted logo by about 0.2mm compared to the protruding logo, and the protruding logo is projected by the light source of the light emitting diode or inorganic EL which is turned on when using a mobile phone. The display makes it easy to operate the keypad regardless of the ambient light level. It provides the visual effect of upgrading the image of the design pattern.

Claims (21)

delete In the key button structure mounted on the front panel of the mobile phone, An acrylic key injection product having the key button; A protruding layer for printing a protruding logo of an opaque color corresponding to a unique number of a corresponding key button to an upper side of the key injection product; A shield for blocking the light source transmission to a portion which is printed on the rear surface of the key injection product corresponding to the projected logo, and in which the inverted logo set to be larger than the size of the projected logo and the inverted character for displaying the characters of the key button are excluded. layer; And A diffusion layer for providing a translucent color of the inverted character and diffusing the color of the inverted logo, The acrylic material is, Any one of polycarbonate, acrylic, and ABS, and has a light transmittance of 85% to 91% of the key button structure of the mobile phone. 3. The background color of the characters of the key button and the inverted logo printed on the back surface of the key injection product corresponding to the protruding logo between the shielding layer and the back surface of the key injection, and set to be larger than the size of the protruding logo. Key button structure of a mobile phone, characterized in that it further comprises a background layer for providing. The key button structure of a mobile phone according to claim 2, wherein the inverted logo has a tolerance of less than 0.2 mm as a figure amplified by 0.2 mm than the size of the protruding logo. The key button structure of a mobile phone according to claim 2, wherein the shielding layer is a printing layer made of silver pigment or a printing layer in which more than 10% of the mir ink is mixed with a general color pigment. According to claim 2, wherein the shielding layer is a first shielding layer for printing the color of the white system, the second shielding layer for printing the color of the black system to the top of the first shielding layer and the top of the second shielding layer The key button structure of the mobile phone, characterized in that consisting of a third shielding layer for printing the color of the white system. The key of a mobile phone according to claim 2, wherein the shielding layer comprises a first shielding layer for printing gray color and a second shielding layer for printing black color on top of the first shielding layer. Button structure. The key button of claim 2, wherein the shielding layer is formed of a single layer of a black color or a first shielding layer and a second shielding layer of the same color such that the color of the black system overlaps. rescue. delete In the key button structure mounted on the front panel of the mobile phone, A key injection holding said key button; A protruding layer for printing a protruding logo of an opaque color corresponding to a unique number of a corresponding key button to an upper side of the key injection product; A shielding layer for blocking the light source transmission to a portion in which the inverted logo set to be larger than the size of the projected logo and the inverted character for displaying the characters of the key button to the rear position of the key injection product corresponding to the projected logo; A diffusion layer for providing a translucent color of the inverted character; And Chemically includes a diffusion ink for diffusing the light source projected to the inverted logo, and made of a rubber base for fixing the key button to each specific position, The acrylic material is, Any one of polycarbonate, acrylic, and ABS, and has a light transmittance of 85% to 91% of the key button structure of the mobile phone. 12. The background color of the character of the key button and the reverse logo printed on the back surface of the key injection product corresponding to the protruding logo between the shielding layer and the back surface of the key injection, and set to be larger than the size of the protruding logo. Key button structure of a mobile phone, characterized in that it further comprises a background layer for providing. 11. The key button structure of a mobile phone according to claim 10, wherein the inverted logo has a tolerance less than 0.2 mm as a figure amplified by 0.2 mm than the size of the protruding logo. delete A method for printing a logo of a mobile phone key button manufactured in claim 2 or 10, a) printing a protruding logo of an opaque color corresponding to a unique number of the corresponding key button to an upper side of the key injection product holding the key button; b) shielding for blocking the light source transmission to a portion excluding the inverted logo set to be larger than the size of the projected logo to the rear position of the key injection product corresponding to the projected logo and the inverted character for displaying the characters of the key button; Printing a layer; c) printing a diffusion layer to provide a translucent color of the inverted character and to diffuse the color of the inverted logo; And d) logo printing method of a mobile phone key button, characterized in that it comprises a drying step of completely curing the printing state of the key button by using ultraviolet (U.V). 15. The method according to claim 14, further comprising a background layer printing step for providing a background color for a character of the key button and the reverse logo set to be larger than the size of the protruding logo between steps a) and b). How to print the logo of the mobile phone key button. 15. The method of claim 14, wherein the drying step has a drying time of 1 minute at 65 ℃ mobile phone key button logo printing method. 15. The method of claim 14, wherein the inverted logo is 0.2 mm larger than the size of the protruding logo. 15. The method of claim 14, wherein b) is a printing process using a silver pigment or a printing process in which a mir ink is mixed with at least 10% of a general color pigment. 15. The method of claim 14, wherein b) comprises: b-1) printing the color of the white system; b-2) printing the color of the black system after the completion of the step b-1); 2) printing the color of the white system after the end of step b-3) logo printing method of a mobile phone key button. 15. The method of claim 14, wherein the step b) comprises b-1) printing the color of the gray system and b-2) printing the color of the black system after the completion of the step b-1). How to print the logo on the mobile key button. 15. The mobile phone key according to claim 14, wherein the step b) is performed by printing the color of the black system as a single layer or by printing the first and second shielding layers of the same color so that the colors of the black system overlap. How to print the logo on the button.