KR100762172B1 - A base for keypad and a keypad for cellular phone with the base - Google Patents

Abstract

A base for a keypad and a cellular phone keypad using the same are provided to reduce power consumption and improve durability by reducing the number of lighting units. A base for a keypad includes a body(10), a plurality of bosses(20), and a plurality of reflecting units. The body(10) corresponds to the keypad, and has a lighting unit installed at the side to provide light. The plural bosses(20) are formed to be integrally protruded on the bottom of the body(10), and correspond to a metal dome installed on a PCB(Printed Circuit Board) installed in the body(10). The plural reflecting units are formed to be integrally protruded around each boss(20), and are composed of a plurality of protruded reflection patterns(32) for receiving the light emitted from the lighting unit to reflect and refract the light upwardly.

Description

A base for keypad and a keypad for cellular phone with the base}

1 is a rear perspective view showing a keypad according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along line II-II of FIG. 1.

3 is a rear perspective view showing a keypad according to a second embodiment of the present invention;

4 is an enlarged cross-sectional view taken along the line IV-IV of FIG. 3.

5 is a rear perspective view of the base according to the third embodiment of the present invention;

6 is an enlarged cross-sectional view taken along line VI-VI of FIG. 5.

Figure 7 is an enlarged cross-sectional view showing a keypad for a mobile phone having a base according to the present invention.

8 is a perspective view schematically showing a gravure printing method for forming the base of FIG.

Figure 9 is an enlarged perspective view showing another embodiment of the reflection pattern of the base of the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

10, 40, 70: main body 20, 50, 60: boss

30, 60, 90: Reflector 110: Base

120: support plate 130: key plate

The present invention relates to a keypad base and a keypad for a mobile phone using the base, and more particularly, to a base having a reduced thickness, easy to manufacture, and excellent backlighting effect, and employing such a base to improve the thickness of the keypad. The present invention relates to a keypad for a mobile phone which can reduce the size of a mobile phone by optimizing it and optimize the touch sense of a key.

Generally, but not limited to, a mobile phone or a mobile phone is provided with a plurality of keys each having various functions, each of which is integrally formed by a keypad. Of course, each key is slightly protruded outward so that the user or caller can select and press the required key to communicate or obtain necessary information.

On the other hand, the keypad of most mobile phones or mobile phones are made of a material such as transparent or silver polyurethane, silicone, PET, P.C, metal. In addition, most mobile phones or mobile phones are provided with a light source made of a light emitting element such as an LED on the outside of the bottom of the key so that the key can be accurately identified and pressed at night. It can recognize and use numbers or letters printed on keys by lighting effect.

However, such a conventional mobile phone or mobile phone has been shown to cause some problems. First, since backlighting for identification of a keypad or a key is required to install a plurality of LEDs, there is a problem that the structure becomes complicated, manufacturing cost increases, power consumption is excessive, and service life is shortened.

In addition, due to the installation of a plurality of LEDs, the manufacturing process is complicated, the structure is complicated, as well as to secure the installation space, in particular, there is a problem that the thickness of the entire mobile phone is thick.

Accordingly, the present invention has been invented to solve the above-described problems, and a small number of LEDs can provide sufficient light diffusion or backlighting effect, achieve slimming, and provide a base for keypads with excellent touch feeling.

Another object of the present invention is to provide a keypad for a mobile phone which can achieve the slimming of the entire mobile phone and has an excellent backlighting effect.

These objects, in the base for the keypad to provide backlighting by diffusing the light emitted from the plurality of light emitting means is built into the body of the mobile phone and installed on the printed circuit board with a metal dome, is formed corresponding to the keypad, A main body provided with means to provide light; A plurality of bosses integrally formed on the bottom of the main body and corresponding to the metal dome provided in the printed circuit board embedded in the mobile phone main body; And a plurality of reflection parts integrally formed around each boss, the plurality of reflection parts including a plurality of protruding reflection patterns for receiving light emitted from the light emitting means and reflecting and refracting upwards. Can be achieved by

Such objects also include a base; A support plate disposed to maintain a predetermined interval so that an air layer for light reflection is formed on the base, and a support plate formed of silicon so as not to be adhered to the base; And a key plate which is integrally disposed on the support plate and includes a key plate formed with a plurality of keys for pressing by the user to receive a predetermined function.

In addition, the same purpose is formed in the base for the keypad to provide backlighting by diffusing the light emitted from the plurality of light emitting means built in the body of the mobile phone and installed on the printed circuit board with a metal dome, corresponding to the keypad, A main body provided with light emitting means at a side thereof to provide light; A plurality of bosses integrally formed on the bottom of the main body and corresponding to the metal dome provided in the printed circuit board embedded in the mobile phone main body; And a plurality of reflection parts integrally formed around each boss, the reflection parts including a plurality of negative reflection patterns for receiving light emitted from the light emitting means and reflecting and refracting upwards. Can be achieved by

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a rear perspective view showing a base for a keypad according to a first embodiment of the present invention, Figure 2 is an enlarged cross-sectional view according to line II-II of Figure 1, Figure 3 is a keypad according to a second embodiment of the present invention 4 is an enlarged cross-sectional view taken along the line IV-IV of FIG. 3, FIG. 5 is a back perspective view of the base according to the third embodiment of the present invention, and FIG. 6 is a line VI of FIG. 5. 7 is an enlarged cross-sectional view according to -VI, Figure 7 is a cross-sectional view showing a keypad for a mobile phone having a base according to the present invention, Figure 8 is a perspective view schematically showing a gravure printing method for forming the base of FIG.

First, referring to FIGS. 1 and 2, the base according to the present invention includes a rectangular main body 10 formed of a thin film.

The main body 10 is preferably formed of a polycarbonate (PC) film having a different property from that of silicon in order to avoid temporary contact with a support plate formed of silicon of a mobile phone keypad, which will be described later.

Optionally, one, two or more receiving grooves 12 may be formed in the upper, lower side, each side, or corner portion of the main body 10 so that light emitting means such as an LED may be connected or inserted. In the present exemplary embodiment, the receiving groove 12 is formed on the upper side of the one side and the lower side of the other side, but the position and number thereof may be changed according to the size of the base and the structure of the keypad or the circuit board. .

The rear side of the main body 10 is integrally provided with a boss 20 projecting downward at a position corresponding to the position of each key provided in the key top of the cellular phone keypad to be described later.

Of course, each boss 20 is formed so as to be able to press the corresponding portion of the circuit board (not shown) embedded in the main body of the mobile phone as described below, it is also preferably formed at the same time when forming the main body 10. .

In particular, the base according to the first embodiment of the present invention includes a light reflecting portion 30 for reflecting light supplied from the side of the main body 10 to provide backlighting to the keypad.

Each light reflection portion 30 is preferably formed of a plurality of reflective patterns 32 formed in a suitable shape around each boss 20 protruding from the lower surface of the main body 10.

In addition, it is preferable that each reflection pattern 32 forming each of these light reflection portions is formed by a gravure printing method. Each of the reflective patterns 32 is formed of a transparent ink or paint, and more preferably, it is formed of an ink for gravure printing which is excellent in transmittance and refractive index and can be easily cured by ultraviolet (UV).

In addition, each reflective pattern formed by printing in a gravure method is reflected in a relatively large angle of light entering the main body such as a semi-circle, dome, cone, square cone, hexagon cone, linear, and hemispherical shape, resulting in backlighting of the keypad or key plate. It is preferably formed to.

Optionally, in the present embodiment, although the light reflection part 30 is illustrated as having a plurality of reflective patterns embossed and protruded around each boss 20 protruding from the lower surface of the main body 10, the lower part of the light reflecting part 30 protrudes. It may be formed in a form that is engraved from the surface of the face. In this case, the engraved shape of the reflective pattern 32 'may be formed in various shapes such as a semicircle, a dome, a cone, a square pyramid, a hexagonal pyramid, a linear, a hemisphere, and the like. In this case, each reflective pattern is opposite to the gravure printing method, that is, as shown in FIG. 9, the main body (using the roller R 'of the pattern protruding pattern P' on the surface). The reflective pattern 32 ′ may be formed on the rear surface of the base 10.

On the other hand, the base according to the second embodiment of the present invention shown in Figures 3 and 4 has a structure similar to the base according to the first embodiment described above, the difference that the boss and the light reflecting portion is formed by gravure printing at the same time to be.

That is, the base according to the second embodiment basically has a rectangular main body 40.

The main body 40 is preferably formed of a polycarbonate (PC) film having a different property from that of silicon in order to avoid temporary contact with a key plate formed of silicon of a keypad of a mobile phone, which will be described later.

Optionally, one, two or more receiving grooves 42 may be formed in the upper, lower side, each side, or corner portion of the main body 40 so that light emitting means such as an LED may be connected or inserted.

In particular, the back of the main body 40, the boss 50 is formed integrally with the boss 50 protruding downward at a position corresponding to the position of each key provided on the key top of the mobile phone keypad to be described later, the boss 50 is It is preferable to form integrally by the gravure method.

That is, each of these bosses 32 is preferably formed of a transparent ink which has a high transmittance and a refractive index by a gravure printing apparatus and can be easily cured by ultraviolet rays.

In addition, at the same time as the boss 50 is formed, the light reflection portion 60 for reflecting the light supplied from the side of the main body 40 to provide backlighting to the keypad is provided in the gravure printing method. It is formed integrally by

Of course, each of the light reflection portion 60 is preferably formed of a plurality of reflective patterns 62 formed in a suitable shape around each boss 20 protrudingly printed on the lower surface of the main body 10.

In addition, each of the reflective patterns 62 is formed of transparent ink or paint, such as the boss 50, and is particularly formed of transparent ink having high transmittance and refractive index, and each of the reflective patterns has a hemispherical shape, a dome shape, a cone shape, a linear shape, It is preferable that the light entering the main body, such as a quadrangular pyramid, is reflected at a relatively large angle to consequently backlight the keypad.

Meanwhile, the base for the mobile phone keypad according to the third embodiment of the present invention as shown in FIGS. 5 and 6 is formed similarly to the base according to the first and second embodiments described above, but the main body, the boss and the light reflection. The difference is that the addition is printed and formed by a single gravure method.

That is, the base according to the third embodiment of the present invention preferably has a rectangular main body 70, the base 80, and the reflector 90 integrally formed on the release film 100 by one-time gravure printing. Do. Of course, it is preferable that the main body 70, the base 80 and the reflecting portion 90 are all formed of a transparent gravure printing ink.

Of course, one or two receiving grooves 72 are formed on the upper, lower side, each side, or corner of the main body 70 so that light emitting means such as an LED can be connected or inserted, and the boss 80 is formed. ) Is protruded downward at a position corresponding to the position of each key provided on the key top of the mobile phone keypad, the light reflecting portion 90 protrudes around each boss 80 protruded to the lower surface of the main body 70 In the hemispherical, dome, linear, square pyramid, cone, etc., the light entering the main body is composed of a plurality of reflective patterns 92 for reflecting at a relatively large angle.

On the other hand, the base according to each embodiment as described above is preferably printed by the printing unit (P) which can be engraved in various forms on the roller (R), as shown in FIG. Of course, the printing portion (P) is formed by various etching or engraving on the surface of the roller (R) according to the shape of the base, each printing portion (P) is a method that is transferred to the main body or the release film after receiving the transparent ink Printing is in progress. Since the gravure printing method and the system are well known to those skilled in the art, the detailed description is omitted for clarity.

Hereinafter, a backlight for a cellular phone keypad having a base configured as described above and a keypad for the cellular phone will be described in detail.

First, as illustrated in FIG. 7, the keypad for a mobile phone having a base according to the present invention is provided on a printed circuit board S mounted on a main body of a mobile phone so as to execute a function corresponding to each key described below. The base 110 having the main body 10; 40; 70 as described above, which is provided with a corresponding boss (20; 50; 80) to press the metal dome (D) is installed.

Here, the LED (L) is installed at the appropriate position of the printed circuit board (S) to provide light in the receiving grooves (12; 42; 72) formed in the main body (10; 40; 70) of each base 110 Is received to provide the LED light from the main body (10; 40; 70) of each base.

The support plate 120 is installed at an upper portion of the base 110 at a predetermined interval, i.e., a position at which the air layer A is formed at a predetermined interval so that the light propagating inside the base 110 is immediately reflected upon contact with the air. . The support plate 120 is made of silicon. Here, the base 110 is formed of polycarbonate, so that when the user presses a key, the support plate 120 is not temporarily bonded to the base 110 so that a reflective layer of stable light, that is, an air layer A may be maintained at all times. will be.

Optionally, the lower portion of the support plate 120 may be provided with a protrusion protruding to correspond to the boss (20; 50; 80) protruding from the lower portion of the main body (10; 40; 70) of the base 110; . Each protrusion serves to press each boss 20; 50; 80 of the base 110 so that the boss 20; 50; 80 presses the corresponding metal dome D.

The key plate 130 is integrally provided on the support plate 120. The key plate 130 is formed in a flat plate shape, preferably formed of polycarbonate or polyethylene.

The key plate 130 is actually provided with a plurality of keys 132 for pressing by the user to receive a predetermined function. Of course, each key 132 is formed at a position corresponding to each boss (20; 50; 80) of the base 110 described above, each key 132 has a letter, number, Codes and the like are formed by processes such as printing, indexing, stamping, piercing, laser marking, and the like.

As such, when the user is turning on the mobile phone or manipulating the keys while the keypad having the base 10; 40; 70 is mounted on the mobile phone, a sufficient and effective light is provided to each key or the keypad as a whole. Appeared.

That is, when the user uses a mobile phone, opens a flip to check a window, or opens a cover, the LED L emits light. At this time, the light emitted from the AD (L) is transmitted from the side of the main body (10; 40; 70) of the base 110 to the inside, some of the light is transmitted toward the other side and the other part of the light is diffused at different angles .

Here, the light of some of the light emitted at different angles is immediately reflected in contact with the air layer A in contact with the upper and lower surfaces of the main body 10; 40; 70 of the base 110, as indicated by the arrows in FIG. 7. And refraction, such reflection and refraction are continuously and repeatedly performed.

In particular, the light reaching each of the reflective patterns 32; 62; 92 of the reflecting portions 30; 60; 90 by reflection or refraction directly from the LED L is reflected at an obtuse angle or almost vertically to support the keypad. Through 120, each key 132 of the keyplate 130 or the periphery of the key 132 is emitted, and the backlighting of the corresponding key 132 is performed, whereby the user is indexed to the corresponding key 132. The marker can be effectively and easily identified to operate the phone.

Therefore, even if a small number of light emitting means such as LEDs are installed in the main body of the mobile phone, the marking of each key can be recognized brightly and clearly by the intensive backlighting and illumination of the corresponding key.

As a result, according to the keypad base according to the present invention and a keypad for a mobile phone having the base, only a light emitting means such as a few LEDs can provide a sufficient backlighting effect on the keypad or each key, There is an effect that improves the productability.

In addition, the number of light emitting means can be reduced to reduce power consumption, extend the service life, and in particular, to reduce the overall thickness of the keypad can reduce the overall thickness of the mobile phone can be made slimmer and compact There is an advantage.

While a preferred embodiment according to the present invention has been described above, it will be understood by those skilled in the art that various modifications and changes can be made without departing from the scope of the appended claims.

Claims (7)

In the base for the keypad to provide backlighting by diffusing light emitted from a plurality of light emitting means installed in the body of the mobile phone and provided on the printed circuit board with a metal dome, A main body formed to correspond to the keypad and provided with light emitting means disposed on a side thereof; A plurality of bosses integrally formed on the bottom of the main body and corresponding to the metal dome provided on the printed circuit board embedded in the mobile phone main body; And A base for a keypad, which is integrally formed around each boss and includes a plurality of reflecting portions formed of a plurality of projecting reflection patterns for receiving light emitted from the light emitting means and reflecting and refracting upwards. . The keypad base according to claim 1, wherein the main body is made of polycarbonate, the light emitting means is an LED, and a receiving groove into which the LED is inserted is formed at a side of the main body. The method of claim 1, wherein each of the boss is formed integrally with the main body, the reflection pattern of each of the reflecting portion is characterized in that the gravure printing of transparent ink around the boss is formed integrally. Base for keypad. The keypad base according to claim 1, wherein the main body is made of polycarbonate, and the reflective patterns of the respective bosses and the respective reflecting portions are simultaneously formed by gravure printing with transparent ink. The keypad base of claim 1, wherein the main body, the boss, and the reflector are integrally formed on the release film at the same time with transparent ink. A base according to any one of claims 1 to 5; A support plate disposed to maintain a predetermined price such that an air layer for light reflection is formed on the base, and formed of silicon so as not to adhere to the base; And The keypad for a mobile phone, characterized in that it is integrally disposed on the support plate, a key plate formed with a plurality of keys for the user to press a predetermined function provided. In the base for the keypad to provide backlighting by diffusing light emitted from a plurality of light emitting means installed in the body of the mobile phone and provided on the printed circuit board with a metal dome, A main body formed to correspond to the keypad and provided with light to the light emitting means; A plurality of bosses integrally formed on the bottom of the main body and corresponding to the metal dome provided on the printed circuit board embedded in the mobile phone main body; And A base for a keypad, which is integrally formed around each boss and includes a plurality of reflective portions formed by a plurality of negative reflective patterns for receiving light emitted from the light emitting means and reflecting and refracting upwards. .

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