KR100627971B1 - Unity type el keypad of portable appliance and thereof manufacturing method - Google Patents

Abstract

The present invention provides a soft film 61 to which a key K is bonded, a hard film 62 laminated to the soft film 61, and a base 63 attached to the hard film 62 and having a boss 63a. The pad P can be completed, thereby maximizing the adhesion to the key K and actively protecting the EL lamp layer 64 while improving the click and touch feeling by the key top KT. In addition, it is possible to ensure the convenience of the manufacturing process together, to make it thinner, and also to provide the EL lamp layer 64 for backlighting, thereby eliminating the mounting process of the lamp L on the circuit board H. The present invention relates to an integrated EL keypad for a portable terminal and a method for manufacturing the same, which can further reduce the size of the EL lamp layer 64 and provide a primer layer 65 under the EL lamp layer 64 to maximize adhesion to the base 63.

Description

Unit type EL keypad for portable terminal and manufacturing method thereof {UNITY TYPE EL KEYPAD OF PORTABLE APPLIANCE AND THEREOF MANUFACTURING METHOD}

1 is a perspective view showing a product to which a keypad for a general portable terminal is applied.

2 is a cross-sectional view of a dome switch and a circuit board showing a keypad for a portable terminal according to the prior art.

Figure 3 is a process chart showing a manufacturing method of a keypad for a portable terminal according to the prior art.

4 is a cross-sectional view of a dome switch and a circuit board to which an integrated EL keypad for a portable terminal according to the present invention is applied.

5a to 5c is a process chart showing a manufacturing method of an integrated EL keypad for a portable terminal according to the present invention.

     ≡ * ≡ Explanation of symbols for the main parts of the drawing ≡ * ≡

KP: Keypad K: Key

K1: Font KT: Key Top

P: Pad D: Dome Switch

F: Front housing H: Circuit board

H1: contact 61: soft film

62: hard film 63: base

63a: boss 64: EL lamp layer

65 primer layer 66 adhesive

The present invention relates to an integrated EL keypad for a portable terminal and a method of manufacturing the same. More particularly, a soft film to which a key is attached, a hard film laminated to the soft film, and a base attached to the hard film and having a boss are clicked on. The present invention relates to an integrated EL keypad for a portable terminal for providing a key top for a sense and a touch feeling, and a method of manufacturing the same.

In general, a keypad for a portable terminal is applied to a portable terminal including a home telephone, a PDA, a cellular phone, and the like, and is used as a switching member for generating a signal in association with a circuit board.

The keypad for the portable terminal introduced below will be described as an example for the convenience of the keypad for a cellular phone, and the present invention is not limited thereto.

1 is a perspective view showing a product to which a keypad for a general mobile terminal is applied, and FIG. 2 is a cross-sectional view of a dome switch D and a circuit board H showing a keypad for a mobile terminal according to the prior art.

As shown in FIGS. 1 and 2, a keypad 50 for a portable terminal according to the prior art is basically provided in a front housing F having a lamp L for providing a point light source, and is placed on a dome switch D. The pad 20 is placed and a key 10 having a font 11a engraved with symbols, letters, numbers, and the like on the key top 11 so as to be identified by each function such as a dial key or a function key.

The pad 20 is provided with a protrusion 21 protruded to touch the contact point H1 of the circuit board H while being interlocked with the elasticity of the dome switch D, and the key 10 is the key top 11. The font 11a is provided and completed by printing, spraying, or laser processing on it.

3 is a process chart showing a method for manufacturing a keypad for a portable terminal according to the prior art.

In the method of manufacturing a keypad for a portable terminal according to the prior art, as shown in FIG. 3, a plastic solution is added to a key groove 31 of a lower mold 30, and then hardened by pressing the mold 40 with a plastic injection molding. The key top 11 is prepared (S1), the top surface of the key top 11 is spray-coated, and then laser-marked to produce the key 10 (S2), and the protrusions 20 are provided on the pad 20. The key 10 is attached to the keypad 50 to complete the process (S3).

By the way, the keypad for the portable terminal according to the prior art has a problem that the pad 20 is too thick so that a feeling of click or touch is inferior and the adhesive force with the key 10 is weak, thereby easily detaching.

 In addition, the lamp (L) for providing a light source for backlining is provided on the circuit board (H) has a disadvantage that not only requires a separate mounting process additionally, but also affects the size of the circuit board (H).

The present invention has been made in order to solve the above problems, the object is to complete the pad as a base having a soft film to which the key is bonded, a hard film laminated to the soft film, and a hard film attached to the hard film It maximizes the adhesive strength with the key and actively protects the EL lamp layer while improving the click and touch feeling by the key top and the convenience of the manufacturing process. An integrated EL keypad for a terminal and a method of manufacturing the same are provided.

The present invention for achieving the above object,

A keypad comprising a key and a pad, wherein the pad includes a soft film to which the key is attached, a hard film laminated to the soft film, an EL lamp layer provided under the hard film, and a bottom of the EL lamp layer. In the integrated EL keypad for a mobile terminal comprising a primer layer and a base attached to the primer layer having a boss,
Including the key top protruding in the portion where the key is seated is a basic feature of the technical configuration.

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The present invention for achieving the above object,

A keypad comprising a key and a pad, the pad comprising (a) laminating a soft film and a hard film, (b) applying an EL lamp layer under the hard film, and (c) the EL lamp In the method of manufacturing an integrated EL keypad for a mobile terminal, comprising the step of providing a primer layer under the layer, and (d) forming a base having a boss under the primer layer.
The step (d) is characterized in that it comprises a step of forming the base having the boss together with the hard film, the EL lamp layer, and the primer layer so that a key top is formed at a portion where the key is seated. .

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Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings, and through these embodiments, the objects, features, and advantages of the present invention can be more easily understood.

4 is a sectional view including a dome switch (D) and a circuit board (H) to which an integrated EL keypad for a portable terminal according to the present invention is applied.

The integrated EL keypad for a portable terminal according to the present invention includes a pad P provided in the front housing F and placed on the dome switch D, and a key provided with a font K1 utilized as a dial key or a function key. K) is basically included.

The pad P is attached to the soft film 61 to which the key K is adhered, the hard film 62 laminated to the soft film 61, and the hard film 62, and the boss 63a. It has a base (Base) 63.

The soft film 61 may be made of a soft material such as polyurethane or silicone, and has a soft property to improve adhesion to the key K and minimize impact or stress when the key K is touched. Actively protects the lamp layer (Electro Luminescence Lamp Layer) 64, the hard film 62 may be made of a hard material such as PET (PolyEthylene Terephthalate resin) or PEN (PolyEthylene Naphthalate resin) When the pad P is made of only the soft film 61, it overcomes the disadvantage of inevitably declining the click feeling or the touch feeling, and provides the convenience of the manufacturing process by maintaining the overall frame when the pad P is manufactured. .

In this case, the soft film 61 and the hard film 62 may be defined as a thin film type rather than a plate type having a thickness.

On the other hand, the integrated EL keypad for a portable terminal according to the present invention may be applied to the lamp (L) for providing a point light source as in the prior art for backlighting, it is possible to eliminate the mounting process of the lamp (L) on the circuit board (H) And an EL lamp layer 64 providing a surface light source under the hard film 62 so that the size thereof can be further reduced.

The EL lamp layer 64 may be made of an organic low molecular material or an organic polymer material and an electrode that emits light energy by a voltage difference, and exhibits high brightness, fast response speed, excellent durability, and wide operating temperature characteristics. It can be applied more advantageously, not only can be driven by extremely low voltage, but also has the property of being able to bend itself freely, and its thickness can be made thinner, more specifically, to transmit light to the font K1. It emits light energy from the surface light source.

Then, a primer layer (65) is provided below the EL lamp layer 64 to maximize the adhesive force with the base 63.

The primer layer 65 allows for close adhesion between the EL lamp layer 64 and the base 63, and preferably, completely removes dust and other contaminants remaining on the EL lamp layer 64 and sufficiently drys them. After the primer is applied by a brush, roller, air gun or printing method, the base 63 is formed to form a pad P.

On the other hand, the integrated EL keypad for a portable terminal according to the present invention may further include a key top (KT) protruding in the portion where the key (K) is seated.

The key top KT is only slightly protruded from the surroundings, but when the key K is clicked, the key top KT can be very useful in that a feeling of clicking or touching the dome switch D can be greatly improved.

And on this key top KT, the adhesive 66 for adhesion with the key K is provided.

Since the surface area of the lower surface of the key K is small, the soft film 61 made of soft material can maximize the adhesive force, and at the same time, when the adhesive 66 is applied to the key top KT, the key K and the soft The bonding force between the films 61 can be doubled, which is preferable.

5A to 5C are process charts illustrating a method of manufacturing an integrated EL keypad for a portable terminal according to the present invention.

The method of manufacturing an integrated EL keypad for a portable terminal according to the present invention comprises a process of completing a keypad KP as a key K and a pad P.

The pad P is laminated with the soft film 61 and the hard film 62 as shown in FIG. 5A (a), and the EL lamp layer 64 is provided below the hard film 62 to provide the keypad KP. The overall thickness of the thin film (b) can be made thinner (b), the primer layer 65 is provided under the EL lamp layer 64 (c), and the base having the boss 63a under the primer layer 65 ( 63) to form and complete (d).

At this time, the soft film 61 and the hard film 62 may be understood as a thin film type rather than a plate type having a thickness, among which the soft film 61 is made of a soft material such as polyurethane or silicon. Maximizes the adhesive force with the key (K) and minimizes the impact or stress when touching the key (K) to actively protect the EL lamp layer 64, the hard film 62 is hard, such as PET or PEN It can be made of a material, and if the pad (P) is made of only the soft film 61, overcome the inevitability that the click or touch will be significantly reduced, and maintain the overall frame during the production of the pad (P) convenience in the manufacturing process Will be provided together.

On the other hand, the step (d) and the hard film 62, EL lamp layer 64 and the primer layer 65 so that the key top (KT) is formed in the portion where the key (K) is seated, as shown in FIG. In addition, it can proceed to the process of forming the base 63 having the boss (63a), more specifically injecting a synthetic resin (silicon resin) to the lower mold not shown, and then press the upper mold to the boss (63a) and the key top ( It proceeds to the process of forming so that KT) may be formed.

Then, the outline is cut to meet the specifications of the keypad KP (e), and the adhesive 66 is applied on the key top KT as shown in FIG. 5C (f), and then the key ( K) is attached to complete as keypad KP (g).

When manufacturing the keypad KP, the soft film 61 and the hard film 62 may be manufactured in accordance with the standard from the beginning, as well as when the soft film 61 and the hard film 62 are more relaxed. The process can be followed, and the soft cushion of the soft film 61 and the adhesive force by the adhesive 66 can further maximize the bonding force with the key (K).

In the integrated EL keypad for a portable terminal according to the present invention having the above-described configuration and process, light is transmitted by the surface light source of the EL lamp layer 64 when the user identifies the font K1 and presses the key K. At the same time, the boss 63a formed on the bottom surface of the pad P overcomes the elastic force of the dome switch D and generates a signal by contacting the contact H1 of the circuit board H.

Subsequently, when the signal is generated and the hand is released from the key K, the dome switch D returns to its original position by its own elasticity.

As described above, in the present invention, the soft film 61 to which the key K is attached, the hard film 62 laminated to the soft film 61, and the hard film 62 are attached to the boss 63a. By allowing the pad P to be completed as the base 63 having, the adhesive force with the key K can be maximized and the EL lamp layer 64 can be actively protected while the feeling of clicking by the key top KT is achieved. And it is possible to further ensure the convenience in the manufacturing process along with the improvement of the touch feeling and there is an effect that becomes thinner.

In addition, the integrated EL keypad for a portable terminal according to the present invention can be provided with an EL lamp layer 64 for backlighting, thereby eliminating the mounting process of the lamp L on the circuit board H, and reducing the size thereof. There is this.

In addition, the primer layer 65 may be provided under the EL lamp layer 64 to maximize adhesion to the base 63.

In addition, the integrated EL keypad for a mobile terminal according to the present invention is further provided with a key top KT protruding in a portion where the key K is seated so that it protrudes finer than its periphery, so that the click and touch feeling of the key K are particularly felt. There is an advantage that can be improved.

As can be seen from the above object, structure and effect of the present invention, the present invention provides a soft film 61 to which a key K is bonded, a hard film 62 laminated to the soft film 61, and a hard film. The key technology is attached to the base 62 having a boss (63a) and the key top for the click and touch feeling to complete the pad (P), and other changeable processes and configurations These can be understood as the number of various cases, the present invention includes all of the number of possible changes, and the interpretation of the claims are also to be equivalent.

Claims (9)

Key pad K and pad (P) comprising a pad (P), the pad (P) is a soft film 61 to which the key (K) is bonded, the hard film laminated to the soft film (61) It adheres to the film 62, the EL lamp layer 64 provided below the hard film 62, the primer layer 65 provided below the EL lamp layer 64, and the primer layer 65. In the integrated EL keypad for a mobile terminal comprising a base (63) having a boss (63a), The integrated EL keypad for a mobile terminal, characterized in that it comprises a key top (KT) protruding in the portion where the key (K) is seated. The method of claim 1, The integrated EL keypad for a mobile terminal, characterized in that the key (K) is attached to the adhesive (66) on the key top (KT). The method according to claim 1 or 2, The soft film 61 is polyurethane or silicone, The hard film 62 is an integrated EL keypad for a mobile terminal, characterized in that PET or PEN. A keypad K with a key K and a pad P, wherein the pad P comprises (a) laminating the soft film 61 and the hard film 62; and (b) the hard film. Providing the EL lamp layer 64 under the film 62; (c) applying the primer layer 65 under the EL lamp layer 64; and (d) the primer layer 65. In the manufacturing method of an integrated EL keypad for a portable terminal, comprising the step of forming a base 63 having a boss 63a below. In step (d), the boss 63a together with the hard film 62, the EL lamp layer 64, and the primer layer 65 are formed so that the key top KT is formed at the portion where the key K is seated. A method of manufacturing an integrated EL keypad for a portable terminal, characterized in that it comprises a step of forming the base (63) having. The method of claim 4, wherein The method of manufacturing an integrated EL keypad for a portable terminal, characterized in that it comprises a step (e) of cutting the outline to meet the standard of the keypad (KP). The method of claim 4, wherein Step (f) of applying an adhesive (66) on the key top (KT), And a step (g) of attaching the key (K) on the adhesive (66) to complete the keypad (KP). The method according to any one of claims 4 to 6, The soft film 61 is polyurethane or silicone, The hard film 62 is a method of manufacturing an integrated EL keypad for a mobile terminal, characterized in that PET or PEN. delete delete

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