KR100906120B1 - Manufacturing method of dome sheet having actuator for portable phone keypad - Google Patents

Abstract

The present invention relates to an actuator integrated dome sheet for a mobile phone keypad and a method of manufacturing the same.

The present invention includes a top sheet having a plurality of embossed actuators protruded on an upper surface thereof and an adhesive layer formed on the lower surface thereof; An adhesive layer is formed on a lower surface of the top sheet to be attached on the main circuit board of the mobile phone, and a plurality of arrangement holes are formed for the arrangement of the dome switch, which will be described later, and an air passage formed between the arrangement holes; ; It is characterized in that it provides an actuator-integrated dome sheet for a mobile phone keypad is provided with a single-piece dome switch that is individually positioned in the placement hole of the base sheet attached and fixed by an adhesive layer formed on the bottom surface of the top sheet.

In addition, the present invention comprises the steps of injecting a UV-curing resin or a thermosetting resin of a transparent material into a mold having a molding hole; Mounting a transparent film having an adhesive layer formed on one surface of the ultraviolet curing resin or the thermal curing resin, wherein the adhesive layer is disposed upward; Bonding to the transparent film while pressing the resin by pressing with a squeeze or hot plate while the transparent film is seated on the resin; Irradiating ultraviolet rays or heat to the resin and the transparent film bonded by the pressing step to dry and fix the resin; Separating the top sheet having a configuration in which an actuator and an adhesive layer are provided above and below the mold when the drying process is completed; Forming a guide hole on an outer side of the top sheet on which the actuator is formed; Attaching an actuator protective tape to a corresponding surface on which an actuator of the top sheet is formed; Laminating a base sheet provided with a plurality of arrangement holes formed on the lower side of the top sheet having the actuator to which the actuator protection tape is attached through an adhesive layer, air passages formed between the arrangement holes, and an adhesive layer formed on a lower surface thereof; It provides a method for manufacturing an actuator integrated dome sheet for a mobile phone keypad comprising the step of attaching and fixing a single dome switch on the lower surface of the top sheet through the hole of the base sheet in the laminated state of the top sheet and the base sheet from which the actuator protective tape is removed. It is done.

Keypad, Dome Sheet, Actuator Integrated, Single Unit Dome Switch, Adhesive Layer

Description

MANUFACTURING METHOD OF DOME SHEET HAVING ACTUATOR FOR PORTABLE PHONE KEYPAD}

The present invention relates to a mobile phone keypad, and more particularly, to improve the uniformity and reliability of the backlight function, to increase the ON operation efficiency of the switching signal according to the key input, and to improve the production yield. The present invention relates to a method for manufacturing an actuator integrated dome sheet for a keypad.

In general, a mobile phone keypad has a concept of a switching device as a key button assembly which is applied to a communication terminal such as a mobile phone to perform a switching function for generating various signals.

Referring to the configuration of a conventional mobile phone keypad including a backlight member, as shown in Figure 1, the key top pad 10 of the PC material or metal plate formed a partitioned partition of the key input by the hole processing, and the key top The electroluminescent (EL) part 20 which is printed on the bottom surface of the pad 10 and functions as a backlight, and the protrusion 31 which is formed to correspond to the hole of the key top pad 10 and is inserted therein is formed on the top surface of the pad 10. The contact signal is provided to the printed circuit board to generate a switching signal corresponding to a key input of the plunger pad 30 made of silicon or urethane material which protrudes a plurality of dome switch pressurizing actuators 32 and the key top pad 10. It consists of a configuration including a dome sheet 40 having a plurality of dome switches 41.

On the other hand, the mobile phone keypad including a conventional backlight member, as shown in Fig. 2, the key top pad 10 of the PC material or metal plate formed a partitioned partition of the key input by hole processing, and the hole of the key top pad 10 And a plunger pad 30 made of silicone or urethane, in which a plurality of dome switch pressurizing actuators 32 are formed on the upper surface and protruded from the lower surface of the key top pad 10. A dome sheet 40 having a plurality of dome switches 41 for providing a contact signal to a printed circuit board to generate a switching signal corresponding to a key input, and between the plunger pad 30 and the dome sheet 40. It is also composed of a configuration including an electroluminescent (EL) sheet or a light guide sheet 50 is disposed to serve the backlight function.

However, in assembling and manufacturing a cellular phone keypad having a conventional configuration as described above, the plunger pad 30 having the actuator 32 is formed in a structure in which the plunger pad 30 is in close contact with the key top pad 10. There is a problem in that the light is splashed or shaded in the portion formed with the 32), there is a problem that the uniformity of the backlight is worse, the EL sheet 50 as shown in Figure 2 is pressed in the actuator 32 of the plunger pad 30 In this case, since the bending due to the pressurization of the actuator 32 is formed in the EL sheet 50, there is a problem of lowering the uniformity and reliability of the backlight.

In addition, conventionally, the actuator 32 of the plunger pad 30 is arranged in a downwardly protruding structure and is provided separately from the dome seat 40 having the dome switch 41, and the protruding actuator 32 has a dome shape. Contact with the upper surface of the dome switch 41 of the dome switch 41 is pressurized and pressurized because the actuator 32 and the dome switch 41 is not the same position on the center line of the correct position is generated In this case, there was a problem such that the ON operation of the switching signal according to the key input was not executed properly, and there was a significant difficulty point such as the accuracy of the assembly in order to solve the assembly eccentricity, and there was a problem that the defective rate was high during mass production.

Furthermore, in the prior art, a plurality of processes are provided by assembling the plunger pad 30 having the actuator 32 positioned on the bottom surface of the key top pad 10 and positioned above the dome sheet 40. Since the process takes a separate process to form the plunger pad 30 having the actuator 32 and the manufacturing cost is increased, there is a problem that increases the manufacturing cost, and the vacuum when forming the actuator 32 of the plunger pad 30 There was a high problem of the occurrence of defective molding due to the molding.

It is an object of the present invention to provide a method for manufacturing an actuator integrated dome sheet for a mobile phone keypad, in which the actuator for pressurizing the dome switch is integrally formed with the dome switch.

In addition, the present invention can improve the uniformity and reliability of the backlight function and improve the ON operating efficiency of the switching signal according to the key input through the configuration of the seat integrating the actuator with the dome switch, and the assembly eccentricity It is an object of the present invention to provide a method of manufacturing an actuator integrated dome sheet for a mobile phone keypad that can solve the problem and expect an improvement in production yield, as well as reduce manufacturing costs.

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The present invention comprises the steps of injecting a UV curing resin or a thermosetting resin of a transparent material into a mold having a molding hole; Mounting a transparent film having an adhesive layer formed on one surface of the ultraviolet curing resin or the thermal curing resin, wherein the adhesive layer is disposed upward; Bonding to the transparent film while pressing the resin by pressing with a squeeze or hot plate while the transparent film is seated on the resin; Irradiating ultraviolet rays or heat to the resin and the transparent film bonded by the pressing step to dry and fix the resin; Separating the top sheet having a configuration in which an actuator and an adhesive layer are provided above and below the mold when the drying process is completed; Forming a guide hole on an outer side of the top sheet on which the actuator is formed; Attaching an actuator protective tape to a corresponding surface on which an actuator of the top sheet is formed; Laminating a base sheet provided with a plurality of arrangement holes formed on the lower side of the top sheet having the actuator to which the actuator protection tape is attached through an adhesive layer, air passages formed between the arrangement holes, and an adhesive layer formed on a lower surface thereof; It provides a method for manufacturing an actuator integrated dome sheet for a mobile phone keypad comprising the step of attaching and fixing a single dome switch on the lower surface of the top sheet through the hole of the base sheet in the laminated state of the top sheet and the base sheet from which the actuator protective tape is removed. It is done.

The present invention provides an actuator-integrated dome sheet for a mobile phone keypad comprising a dome switch pressurization actuator previously provided separately and integrated with the dome switch, so that the assembly of the keypad assembly can be easily performed, and the actuator is moved upward from the downward protrusion structure. As the structure is improved by the protrusion structure, the ON operation efficiency of the switching signal according to the key input can be improved, and the problem of the existing assembly eccentricity and the difficulty of the assembly work can be solved.

In addition, the present invention can increase the uniformity and reliability for the backlight function by minimizing the actuator and integrally with the dome switch, and can improve the production yield and minimize the defect rate, as well as reduce the assembly process and manufacturing cost.

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

3 and 4, in the actuator integrated dome sheet 100 for a mobile phone keypad according to an embodiment of the present invention, a plurality of embossed actuators 111 are projected on an upper surface thereof, and an adhesive layer 112 is formed on the lower surface thereof. An adhesive layer 121 is formed on the top sheet 110 and a bottom surface of the top sheet 110 to be attached to the main circuit board of the mobile phone, and an arrangement hole for arranging the dome switch 130 described below. A plurality of 122 are formed and the base sheet 120 having an air passage 123 formed between the arrangement holes 122 and the base sheet 120 are individually positioned in the arrangement holes 122 of the base sheet 120 to form the top sheet 110. It consists of a configuration including a dome switch 130 of a single piece attached and fixed by the adhesive layer 112 formed on the lower surface.

Here, a protective tape (not shown) is provided below the adhesive layer 121 of the base sheet 120 to remove and use the protective tape when the keypad is assembled.

The top sheet 110 having the actuator 111 on the upper surface is preferably made of a transparent material so that the attachment of the single-piece dome switch 130 disposed downward can be easily confirmed.

At this time, the top sheet 110 is formed in a thickness of 0.01 ~ 0.5mm, the actuator 111 is protruding in the embossed form is formed to protrude to a thickness of 0.01 ~ 3mm from the top surface of the top sheet 110, such as a circular or triangular or square It can be configured in the shape of a polygon.

The base sheet 120 may be formed to a thickness of 0.01 ~ 0.5mm the same as the top sheet 110, the air passage 123 is smooth operation during switching of the dome switch 130 by inducing air flow And a configuration for improving a feeling of click.

The manufacturing process of the actuator integrated dome sheet according to the embodiment of the present invention having such a configuration will be described below with reference to FIGS. 5A to 5I.

First, as shown in FIG. 5A, a UV-curable resin or a thermosetting resin 1 of a transparent material is introduced into a mold M having a molding hole of 0.01 to 3 mm.

The transparent film 2 formed on one surface of the adhesive layer 2a made of a material such as PET, PC, PVC, PE or the like is seated on the ultraviolet curing resin or the thermal curing resin 1.

At this time, the transparent film 2 is disposed so that the adhesive layer (2a) is located on the upper side to be seated on the resin (1), attach a protective tape (not shown) on the adhesive layer (2a), sometimes the adhesive film is not formed with an adhesive layer It can also be used to seat, but in the case of applying this is a process of forming the adhesive layer is made in a post-process.

Here, the transparent film having an adhesive layer or the transparent film without the adhesive layer is used having a thickness of 0.01 ~ 0.5mm.

Subsequently, as shown in FIG. 5C, the transparent film 2 is pressed while using the squeeze S or the hot plate HP while the transparent film 2 is seated on the resin 1 to pressurize the resin 1. Combine with

At this time, the resin (1) is combined with the transparent film (2) while the unnecessary amount is removed by pressing, and when the hot plate (HP) is used, the resin is compressed by attaching urethane (U) to the lower surface of the hot plate to perform compression. (1) It is preferable to prevent the occurrence of bubbles between the transparent film (2) bonded thereto, and may be applied differently depending on the material used for the transparent film, but 3 seconds at a temperature of 50 ~ 70 ℃ It is preferable to carry out the compression during the process.

The resin (1) and the transparent film (2) bonded by the pressing as shown in Figure 5d, is fixed by irradiating with ultraviolet or heat to dry treatment.

When the drying process is completed, as shown in FIG. 5E, the top sheet 110 of the transparent film having the actuator 111 and the adhesive layer 112 made of resin from the mold M is separated.

At this time, the actuator 111 is formed to a thickness of 0.01 ~ 3mm corresponding to the molding hole of the mold (M).

As illustrated in FIG. 5F, a guide hole H1 is formed on the outer side of the top sheet 110 on which the actuator 111 is formed.

Subsequently, the actuator protective tape 3 is laminated on the corresponding surface on which the actuator 111 of the top sheet 110 is formed as shown in FIG. 5G.

At this time, the actuator protective tape (3) is to use a hard one having a thickness equal to or greater than the actuator forming thickness, if using a transparent film without an adhesive layer to form an adhesive layer on the lower surface of the transparent film Will be additionally required here.

A plurality of arrangement holes 122 are formed on the lower side of the top sheet 110 having the actuator 111 on which the actuator protection tape 3 is laminated through the adhesive layer 112, and an air passage (B) between the arrangement holes 122 is provided. 123 is formed and the base sheet 120 provided to form the adhesive layer 121 on the lower surface is laminated.

At this time, the lamination of the top sheet 110 and the base sheet 120, as shown in Figure 5h, it is preferable to perform the lamination using the fixing jig (J) and the roller (R) so that no bubbles are generated, the base sheet 120 ) And the top sheet 110 having the actuator 111 on which the actuator protective tape 3 is laminated on the base sheet 120 while the fixing pin is inserted into the guide pin GP of the fixing jig J, and the roller R Rolling process

In addition, the base sheet 120 may be one that does not have a lower adhesive layer 121.

Here, as the hard actuator protective tape 3 is laminated and used, it is possible to protect the actuator 111 protruding during the rolling process without being crushed or the like.

Subsequently, the dome switch 130 of the single piece is formed on the lower surface of the top sheet 110 through the arrangement hole 122 of the base sheet 120 in the state where the top sheet 110 and the base sheet 120 where the actuator protection tape 3 is removed. Attach and secure) to complete.

At this time, as shown in Fig. 5i, the top sheet 110 and the base sheet 120 in the state of lamination of the actuator protection tape (3) is removed, the fixed portion of the device (T) in which the dome switch 130 of the unit is aligned The dome switch 130 of the single piece is fixed to the lower surface of the top sheet 110 through the arrangement hole 122 of the base sheet 120 in the fixed state.

In addition, as shown in FIG. 6, the actuator integrated dome sheet 200 for a mobile phone keypad according to another embodiment of the present invention has a plurality of embossed actuators 211 protruded on the upper surface thereof and an air passage 213 on the lower surface thereof. The plunger sheet 210 having the adhesive layer 212 formed thereon, and the dome switch 220 of a single piece which are individually positioned and fixed to the adhesive layer 212 positioned on the lower line of the actuator 211 formed on the plunger sheet 210 are fixed. It is made to include.

In this case, the plunger sheet 210 having the actuator 211 on the upper surface is preferably made of a transparent material so that the attachment and fixation of the one-piece dome switch 220 attached and fixed to the lower side can be easily confirmed.

In addition, the plunger sheet 210 is formed in a thickness of 0.01 ~ 0.5mm, the actuator 211 is protruded in the embossed form protruding to form a thickness of 0.01 ~ 3mm from the upper surface of the plunger sheet 210 and round or triangular It can be configured in the shape of a polygon such as a square.

The manufacturing process of the actuator integrated dome sheet according to another embodiment of the present invention having such a configuration will be described below with reference to FIGS. 7A to 7I.

First, as shown in FIG. 7A, a UV-curable resin or a thermosetting resin 1 of a transparent material is introduced into a mold M having a molding hole of 0.01 to 3 mm.

The transparent film 2 made of a material such as PET, PC, PVC, PE, or the like is seated on the ultraviolet curing resin or the thermal curing resin 1 as shown in FIG. 7B.

Here, the transparent film is used having a thickness of 0.01 ~ 0.5mm.

Subsequently, as shown in FIG. 7C, the transparent film 2 is pressed while using the squeeze S or the hot plate HP while the transparent film 2 is seated on the resin 1 to pressurize the resin 1. Combine with

At this time, the resin (1) is combined with the transparent film (2) while the unnecessary amount is removed by pressing, and when the hot plate (HP) is used, the resin is compressed by attaching urethane (U) to the lower surface of the hot plate to perform compression. (1) It is preferable to prevent the occurrence of bubbles between the transparent film (2) bonded thereto, and may be applied differently depending on the material used for the transparent film, but 3 seconds at a temperature of 50 ~ 70 ℃ It is preferable to carry out the compression during the process.

The resin (1) and the transparent film (2) bonded by the pressing as shown in Figure 7d, is fixed by irradiating ultraviolet rays or heat to dry.

When the drying process is completed, as shown in FIG. 7E, the plunger sheet 210 of the transparent film having the actuator 211 made of resin is separated from the mold M. Referring to FIG.

At this time, the actuator 211 is formed to a thickness of 0.01 ~ 3mm corresponding to the molding hole of the mold (M).

As shown in FIG. 7F, a guide hole H1 is formed on the outer side of the plunger sheet 210 in which the actuator 211 is formed.

Subsequently, the actuator protection tape 3 is attached to the corresponding surface on which the actuator 211 of the plunger sheet 210 is formed, as shown in FIG. 7G.

At this time, the actuator protective tape 3 is preferably used to use a hard one having a thickness equal to or greater than the thickness of the actuator.

Here, as the hard actuator protective tape 3 is laminated and used, it is possible to protect the actuator 211 protruded during silk screen printing without damaging such as crushing.

Through the silkscreen printing on the lower surface of the plunger sheet 210 having the actuator 211 to which the actuator protective tape 3 is attached, as shown in FIG. 7H, the adhesive layer 212 having the air passage 213 is 0.01 to ~. It is formed to a thickness of 0.1mm.

Thereafter, as shown in FIG. 7I, the dome switch 120 of the single piece is attached and fixed to the lower surface of the adhesive layer 212 of the plunger sheet 210 having the actuator 211 with the actuator protective tape 3 removed.

In other words, the adhesive layer formed on the plunger sheet 210 in a state where the plunger sheet 210 from which the actuator protective tape 3 has been removed is fixed on the fixing part of the device T in which the single dome switch 120 is aligned. The dome switch 130 of a single piece is fixed to the lower surface of the 212.

On the other hand, Figures 8 and 9 is a cross-sectional view of the keypad assembly showing an application example of the actuator integrated dome sheet according to an embodiment of the present invention, Figure 8 is an exemplary view to which an embodiment of the present invention is applied, Figure 9 is a view of the present invention It is an exemplary figure to which another embodiment was applied.

Referring to FIG. 8, the dome sheet 100 having the structure according to the embodiment of the present invention is printed on the bottom surface of the key top pad 310 formed by integrally printing the backlight layer 311 by the EL layer or the light guide layer. The mobile phone keypad assembly 300a is simplified by attaching using the double-sided tape 320 and attaching the dome sheet 100 through the adhesive layer 121 of the base sheet 120 on the main circuit board 330 of the PCB or FPC. Will be able to assemble.

9, the bottom surface of the key top pad 310 is formed by integrally printing the backlight layer 311 formed by the EL layer or the light guide layer on the bottom surface of the dome sheet 200 having the structure according to another embodiment of the present invention. To the mobile phone keypad assembly 300b by attaching the dome sheet 200 through the adhesive layer 212 of the plunger sheet 210 on the main circuit board 330 of the PCB or FPC. It will be easy to assemble.

Therefore, when the actuator integrated dome sheet 100 and 200 according to the present invention is applied to the keypad assembly, the actuators 111 and 211 are formed under the backlight sheet or the backlight layer, so that light uniformity is improved and the key is emitted. The input feeling can be improved, and the actuators 111 and 211 make surface contact with the dome switches 130 and 220, thereby increasing the efficiency of switching ON and increasing the efficiency of the dome. Since the contact with the switch is not degraded, the convenience and the defective rate of the assembly work can be improved.

In addition, the present invention is to create a structure for placing the backlight member under the key top pad, and the effect of removing the thickness of the plunger pad having an existing actuator is generated, not only to provide the effect of increasing the brightness but also to configure the actuator integrally to the dome sheet By doing so, it is possible to eliminate the existing manufacturing process, reduce manufacturing costs, and simplify the assembly process.

In addition, the present invention can eliminate the bending formed by the existing backlight member is clicked with the dome switch to improve the operating characteristics and reliability, it is possible to simplify the assembly process and minimize the defective rate to improve the production yield.

1 is a cross-sectional view showing an embodiment of a conventional cellular phone keypad.

Figure 2 is a cross-sectional view showing another embodiment of a conventional mobile phone keypad.

3 and 4 are an exploded perspective view and a cross-sectional view showing an actuator integrated dome sheet for a mobile phone keypad according to an embodiment of the present invention.

Figures 5a to 5i is a process diagram showing the manufacturing process of the actuator integrated dome sheet according to an embodiment of the present invention.

Figure 6 is a cross-sectional view showing an actuator integrated dome sheet for a mobile phone keypad according to another embodiment of the present invention.

Figures 7a to 7i is a process diagram showing the manufacturing process of the actuator integrated dome sheet according to another embodiment of the present invention.

8 and 9 are cross-sectional views of the keypad assembly showing an application example of the actuator integrated dome sheet according to the embodiment of the present invention.

Claims (7)

delete delete delete delete delete Injecting a UV curing resin or a thermosetting resin of a transparent material into a mold having a molding hole; Mounting a transparent film having an adhesive layer formed on one surface of the ultraviolet curing resin or the thermal curing resin, wherein the adhesive layer is disposed upward; Bonding to the transparent film while pressing the resin by pressing with a squeeze or hot plate while the transparent film is seated on the resin; Irradiating ultraviolet rays or heat to the resin and the transparent film bonded by the pressing step to dry and fix the resin; Separating the top sheet having a configuration in which an actuator and an adhesive layer are provided above and below the mold when the drying process is completed; Forming a guide hole on an outer side of the top sheet on which the actuator is formed; Attaching an actuator protective tape to a corresponding surface on which an actuator of the top sheet is formed; Laminating a base sheet provided with a plurality of arrangement holes formed on the lower side of the top sheet having the actuator to which the actuator protection tape is attached through an adhesive layer, air passages formed between the arrangement holes, and an adhesive layer formed on a lower surface thereof; Method of manufacturing an actuator integrated dome sheet for a mobile phone keypad comprising the step of attaching and fixing a single dome switch on the bottom surface of the top sheet through the arrangement hole of the base sheet in the laminated state of the top sheet and the base sheet from which the actuator protective tape is removed. . Injecting a UV curing resin or a thermosetting resin of a transparent material into a mold having a molding hole; Mounting a transparent film on the ultraviolet curing resin or the thermal curing resin; Bonding to the transparent film while pressing the resin by pressing with a squeeze or hot plate while the transparent film is seated on the resin; Irradiating ultraviolet rays or heat to the resin and the transparent film bonded by the pressing and drying and fixing the resin and the transparent film; Separating the plunger sheet of the transparent film having the actuator by the resin from the mold when the drying process is completed; Forming a guide hole on an outer side of the plunger sheet on which the actuator is formed; Attaching an actuator protective tape to a corresponding surface on which an actuator of the plunger sheet is formed; Forming an adhesive layer having an air passage through silkscreen printing on a lower surface of the plunger sheet having an actuator to which the actuator protective tape is attached; A method of manufacturing an actuator integrated dome sheet for a mobile phone keypad comprising the step of attaching and fixing a single dome switch to a lower surface of an adhesive layer of a plunger sheet having an actuator in a state where the actuator protective tape is removed.

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