KR200407211Y1 - cellular phone keypad - Google Patents

Abstract

The present invention relates to a method for manufacturing a keypad for a mobile phone and a keypad for a mobile phone, and in particular, to a keypad for a mobile phone that is beautiful in appearance, robust in structure, and capable of mass production in terms of production.

In particular, the keypad for a mobile phone according to the present invention comprises a keypad frame made of a metal material, and attaches a plurality of synthetic resin keys thereto, and relates to a keypad for a mobile phone in which a metal key frame and a synthetic resin key are integrally formed.

The manufacturing process of the present invention includes a metal plate preparation step, a surface processing molding step of forming a metal plate using a mechanical machine such as a forming machine or a press machine, or forming a keyed hole for attaching a hole or a synthetic resin key to the surface by a chemical corrosion process;

 It has a pretreatment process that selectively performs the pretreatment process such as plating, surface polishing, anticorrosion treatment, gloss treatment, etc.

 A key formation process of forming a synthetic resin key by inserting a metal keyframe into a mold and injecting a synthetic resin solution into the synthetic resin key attachment hole;

It has a coating process for coloring the surface of the synthetic resin key, and then has a character forming process of forming letters, numbers, symbols, etc. on the colored synthetic resin key,

 A surface protection process of forming a uv coating film to protect the surface of the synthetic resin jackie;

The keypad for mobile phones is manufactured by attaching a protective pad to the bottom of the metal keyframe and attaching a protective cover plate on the surface.

Its structure is a metal plate through a mechanical processing machine or chemical corrosion process to form holes or key presses on the surface, and the synthetic resin solution is injected into the key presses to form a synthetic resin key connected to the metal key frame, and on the surface of the synthetic resin key The present invention relates to a keypad for a mobile phone having a color protection, forming letters, numbers, symbols, and the like on a colored surface and forming a uv coating film for protecting the same, and having a bottom protective pad on the bottom of a metal keyframe and a protective pad on the surface.

Cell Phones, Keypads for Mobile Phones

Description

Cellular keypad

1 is a perspective view of a metal plate to be processed in the present invention.

Figure 2 is a perspective view showing an example of a metal key frame showing that the perforated surface of the metal plate in the present invention to form a hole or cut grooves.

Figure 3 is a schematic perspective view showing that the synthetic resin key integrally molded on the metal keyframe in the present invention.

Figure 4 is an exploded perspective view showing the surface plate and the bottom protective plate attached to the key frame molded the synthetic resin key in the present invention.

5 is a cross-sectional view of the process of the present invention

5A is a cross-sectional view of a metal sheet

Fig. 5B is a cross sectional view of a metal keyframe in which holes in the surface of the metal plate are formed to form holes, cutouts and the like.

5C is a cross-sectional view showing the pretreatment of the metal keyframe.

Figure 5D is a cross-sectional view showing that the metal keyframe is put into the mold and the synthetic resin key is integrally formed on the surface.

Fig. 5E is a sectional view showing a colored surface formed on a synthetic resin key formed on a metal keyframe.

Fig. 5F is a sectional view showing that the colored surface on the surface of the synthetic resin key is peeled off with a laser to form letters, numbers, symbols and the like.

Fig. 5G is a sectional view showing coating of UV coating on the surface of synthetic resin key.

Fig. 5H is a cross-sectional view showing that the protective pad on the metal keyframe surface and the bottom protective pad on the bottom.

6 is a cross-sectional view showing that the metal keyframe is charged into a mold and a synthetic resin key is integrally formed on a surface of the present invention.

7 is a process chart of the present invention.

The present invention relates to a method for manufacturing a keypad for a mobile phone and a keypad for a mobile phone, and more particularly, to quickly and easily manufacture a keypad, to provide a keypad manufacturing process capable of producing a large amount in a short time, and for a mobile phone having a solid and beautiful appearance. To get a keypad.

In general, it can be seen that a mobile phone has a keypad as a switching means for performing a dial function for making a call and an additional function for inputting new data or retrieving input data into the mobile phone.

The structure and shape of the keypad for general mobile phones can be seen the key-integrated keypad which is made by protruding the key (button) with the same material as the synthetic resin plate on the flexible synthetic resin plate that is free to bend. You will see a keyed keypad that attaches keys to form a keypad.

When the mobile phone keypad is attached to the mobile phone case body, a key protruding from the surface is coupled to a key hole formed on the surface of the mobile phone case, and the key coupled to the key hole is equal to the surface of the case or slightly higher than the surface of the case. Will have

In addition, between the keypad and the circuit board has a dome switch for the keypad to have a resilient and resilient force to actuate the contacts of the circuit board by pressing a key formed on the keypad surface.

In addition, the bottom of the keypad is provided with a light emitting device, it can be seen that the number or letters, etc. represented on the keypad or keypad in a dark place to emit light.

In such a keypad for a mobile phone, the key (button) integral keypad has the advantage that the production process is simple and mass production, but the design is not excellent.

In addition, the key-type keypad is difficult to mass-produce due to the need to attach a plurality of keys on a thin synthetic resin board, the key is hard and has a good feel and beautiful appearance.

Key-in keypad is applied to a non-folding type mobile phone because the key usually protrudes on the surface of the phone case, and a keyed keypad is mainly used for folding or sliding cell phone with folding cover. can see.

In the production of key-type keypad, print the surface of the key injected with plastic to form numbers or letters, remove unnecessary parts (ribs) around the key, eject the key, separate each key from the frame, and then The bottom of the key is inserted into the groove of the lower mold (jig) manufactured to have the arrangement of the keys so that the bottom of the key is protruded, and the adhesive is applied to the bottom of the key, and then the synthetic resin plate having a plurality of protrusions is adhered thereon. After that, put the upper frame on it again and press it with a press to attach the key on the synthetic resin board integrally, and then remove the upper and lower molds to finally complete the keypad.

The keyed keypad manufactured by the above process has a process of separating the key injected into the plastic from the frame one by one, and it is difficult to mass-produce because it has to go through the manual process to insert the separated plastic key into the mold one by one. As it takes a lot of people, you can see that the production rate is not high.

The present invention has been devised to solve this problem in consideration of the disadvantages of the conventional keypad, and the keypad production according to the present invention is not a method of attaching a key to a synthetic resin plate which is free of bending as shown in the conventional keypad. Key forming holes are formed through mechanical machining processes such as forming processing, punching press processing, or chemical corrosion processes such as chemical corrosion, and synthetic resin keys (buttons) are integrally formed by trans-molding process on the key attachment holes. After coloring, peel off the colored surface with a laser processing machine to form letters, numbers, symbols, etc., and form a UV coating film on it to protect the surface of the synthetic resin key.Silicone rubber, urethane rubber, etc. Bottom pad and surface with multiple key shovels for inserting synthetic resin keys The manufacturing process as with a protective deotpan having holes uniformly and relates to a person ililyi assembly to be mass-produced in a short period of time as possible to automatically produce a mechanical keypad production method and hence the cellular phone keypad that is produced by.

In particular, the present invention is an improvement and development of the "method for manufacturing a mobile phone keypad and a mobile phone keypad manufactured by the same" filed with the utility model application Nos. 10-2005-20580 and 10-2005-20504.

The conventional mobile phone keypad separates the key injected into the mold from the rib, and the work process takes a lot of time by man's manual work by arranging the separated key pieces on the keyboard by hand. There are many, which causes a problem of low production efficiency.

In addition, when each key is placed in the assembly frame, if one key is not properly placed in place, a bad key is manufactured. When applying the adhesive on the bottom of the key, there is a fear of separation when the amount of adhesive is small. If the amount of adhesive is too large, the key operation is not smooth.

In addition, the adhesive is attached to the bottom of the key, and the synthetic resin tube is reapplied on it, and the upper frame is overlaid on it, and the press is pressed with a press to integrally attach the plastic key and the synthetic resin tube, and then remove the upper and lower molds to manufacture the keypad. The conventional method for manufacturing a keypad for a mobile phone has been proposed in view of the fact that the production efficiency is not high due to the manual process performed by human hands, and the present invention is an iron plate, an aluminum plate, a stainless steel plate, or a copper alloy plate. The metal plate is perforated by a mechanical machine such as a laser processing machine, a forming machine, or a punching press, or a metal keyframe having holes or key presses on the surface through a chemical corrosion process, and the metal plate is loaded into a mold. Apply synthetic resin solution to form synthetic resin key integrally on metal key frame. After coloring the surface of the resin key, the colored surface is peeled off with a laser machine to form letters, numbers, and symbols.The bottom of the metal frame is covered with a rubber bottom cover, and the surface is covered with a surface plate. In one, the metal processing frame is produced in a continuous metal processing process and put into the mold, and the synthetic resin key is integrally formed, and a line of processes for attaching the protective plate to the surface and the bottom is produced by an automated line. The keypad for mobile phones can be mass-produced.

Referring to the manufacturing process of the mobile phone keypad according to the present invention step by step.

First, the metal plate 11 is prepared.

As the metal plate 11 used in the present invention, almost any metal plate such as iron plate, stainless steel plate, aluminum plate or copper alloy plate can be used, and a stainless steel plate or a copper alloy plate having a constant strength and hardness of 0.05 to 0.3 mm thickness is appropriate.

The metal plate 11 is formed by using a mechanical processing machine such as a forming machine or a press machine, or by forming a hole 22 on the surface, a synthetic resin key attachment hole 23 and a notch groove 24 on the edge thereof through a chemical corrosion process. A metal keyframe molding process is performed.

Thereafter, the metal keyframe 21 is optionally subjected to a surface pretreatment process such as plating, anticorrosion treatment, or gloss treatment to form a surface protective film 27,

The metal keyframe 21, which has undergone the pretreatment process, is charged into the mold 71, and the synthetic resin key 31 molding process is performed by injecting a transparent synthetic resin solution to protrude to a predetermined height into the synthetic resin key attachment hole 23.

A coating process for coloring the surface of the transparent synthetic resin key 31 is carried out, and the colored surface 33 of the surface of the synthetic resin key 31 is peeled off with a laser processing machine to form characters 35 such as letters, numbers, and symbols. Performing the forming process,

Thereafter, a UV coating process for applying a UV coating layer 32 to protect the surface of the synthetic resin key 31 is performed, and a bottom protection pad 41 made of urethane or silicone is attached to the bottom of the metal keyframe 21. ,

Thereafter, a keypad for a mobile phone is manufactured by a step of attaching a surface protective plate 51 having a plurality of key coupling holes 52 for coupling the synthetic resin keys 31 protruding from the surface of the metal keyframe 21. will be.

 In the method of attaching the synthetic resin key 31 to the metal key frame 21, the metal key frame 21 is charged into the mold 71 and the synthetic resin solution is inserted into the synthetic resin key attachment hole 23 by a transfer molding method. By administering to form a synthetic resin key (31).

The present invention produced by such a process will be described in more detail and at the same time as follows.

 The present invention forms a key, which is a push button of a keypad for a mobile phone, on a metal frame, and includes a hole 22 or a synthetic resin key attachment hole 23 on a surface of a metal plate 11 such as an iron plate, a stainless steel plate, an aluminum plate, or a copper alloy plate. The metal keyframe 21 is formed through the hole, and the synthetic resin solution is injected into the synthetic resin key attachment hole 23 to form the synthetic resin key 31 integrated with the metal keyframe 21.

As the metal plate 11, a metal plate of almost any material can be used, but a stainless steel plate or a copper alloy plate having a thickness of 0.05-0.3 mm and elasticity is appropriate.

The metal plate 11 having the thickness is formed using a mechanical machine such as a forming machine, a punching press, a laser processing machine, or the like, or a hole 22 or a synthetic resin key attachment hole 23 on the surface of the metal plate 11 through a chemical corrosion process. It is processed to form a notch groove 24 or a synthetic resin buried projection 26 in the edge.

Thus, the synthetic resin key attachment hole 23 in which the synthetic resin key 31 is formed in the metal plate 11 and the hole 22 to which the notch groove 24 and another key are coupled so that the synthetic resin key 31 can be easily pressed. Forming the metal key frame 21 and selectively performs a surface treatment process such as plating process, anticorrosive treatment process, gloss process.

When the surface treatment process is performed, the metal keyframe 21 is formed with a thin surface protective film 27 that prevents rust or maintains gloss of the surface.

Thereafter, the metal keyframe 21 is charged into the mold 71, and then a synthetic resin solution is injected into the synthetic resin key attachment hole 23 of the metal key frame 21 by a transfer molding molding method to insert the synthetic resin key attachment hole 23. Synthetic resin jack 31 is formed integrally with each other.

The synthetic resin key 31 formed in the synthetic resin key attachment hole 23 of the metal keyframe 21 is made of a transparent or translucent resin liquid that transmits light, and after the synthetic resin liquid administered to the mold 71 is hardened, After removing the metal keyframe (21) from the mold, color the colored paint on the surface of the synthetic resin key (31) and peel off the colored surface (33) on the surface of the synthetic resin key (31) with a laser processing machine. After forming the letters 35, such as (figure), a UV coating process for protecting the surface and forming a UV coating film 32 to block ultraviolet rays is performed.

Thereafter, a bottom protective pad 41 made of silicone rubber or urethane rubber is attached to the bottom of the metal keyframe 21.

The bottom protective pad 41 serves as a protective film to prevent moisture or foreign matter from entering into the mobile phone and has a protrusion 42 for pressing a key contact inside the mobile phone.

The surface protection pad 51 having a plurality of key coupling holes 52 is coupled to the surface of the metal keyframe 21.

The surface protective pad 51 attached to the metal keyframe 21 and the bottom protective pad 41 attached to the bottom of the metal keyframe 21 are adhered to each other by adhesive bonding.

The plurality of key coupling holes 52 formed in the surface protection plate 51 are combined with a synthetic resin key 31 which is attached to protrude on the surface of the metal keyframe 21, and the height of the synthetic resin jack 31 is increased. When the height is greater than the height of the key coupling hole 52, the synthetic resin key 31 protrudes from the surface protective plate 51, and the height of the synthetic key 31 is greater than that of the key coupling hole 52 of the surface protective plate 51. In the low case, the synthetic resin key 31 is positioned inside the keying hole 52.

In the above, when the height of the synthetic resin key 31 is lower than the height of the key engagement hole 52, the edge of the key engagement hole 52 interferes with the finger, and it is easy to grasp without looking at the key position, and the key is wrong. It provides a keypad for a mobile phone without fear of pressing malfunction.

Most of the keypad for a conventional mobile phone can be seen that the key-type keypad attached to the plastic button corresponding to the key on the thin synthetic resin plate free to bend is mainly used.

Such a keypad with a key-type mobile phone takes a lot of work because of a lot of manual manufacturing process, high failure rate, it can be seen that mass production is difficult.

On the contrary, the keypad for a mobile phone according to the present invention has rigidity by using a thin metal plate instead of using a conventional thin flexible resin plate.

In particular, the metal plate is formed by forming, pressing, laser processing, or corroding to form a keying hole in the metal keyframe, thereby forming a synthetic resin key integral with the metal frame, and putting the metal keyframe into the mold and molding the synthetic resin solution into the mold. It forms a synthetic key that is made of metal keyframe ingot by injecting it into a uniform keypad.The uniform keypad is uniformly mass-produced.The key surface is colored in color, and then the surface is peeled off with a laser processing machine. After forming letters, etc., the surface is protected and UV coating film is formed to protect the key surface.

Such a key manufacturing process for mobile phones can be mass-produced through an automatic assembly production line rather than manual production, which allows mass production of a keypad at low cost.

In addition, the keypad manufactured by the present invention is a very useful design to provide an effect that can reduce the thickness of the mobile phone is thinner than the conventional keypad.

Claims (2)

 A metal plate 11, such as a stainless steel plate or a copper alloy plate, having a constant strength and hardness of 0.05 to 0.3 mm in thickness, is processed to form a hole 22 on the surface, a hole for attaching the synthetic resin key 23, and a notch groove 24 on the edge thereof. It has a metal key frame 21 having a,  Has a synthetic resin key 31 protruding to a certain height in the synthetic resin key attachment hole 23 of the metal key frame 21,  The surface of the synthetic resin key 31 is colored with a colored paint and has a character 35 such as letters, numbers and symbols formed by peeling off the colored surface 33, Has a UV coating film 32 to protect the surface of the synthetic resin key 31, Has a bottom protective pad 41 having a plurality of pressing projections 42 on the bottom surface of the metal keyframe 21,  A keypad for a mobile phone, characterized in that a surface protective plate 51 having a plurality of key coupling holes 52 for coupling a synthetic resin key 31 on a surface of a metal keyframe 21 is attached. The synthetic resin key (31) according to claim 1, wherein the height of the synthetic resin key (31) which is integrally attached to the metal key frame (21) and protrudes above the surface is lower than that of the key coupling hole (52) of the surface protective plate (51). The keypad for a mobile phone, characterized in that the key combination hole 52 is located inside.

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