KR101128357B1 - Pressing projections forming method of keypad - Google Patents

Pressing projections forming method of keypad Download PDF

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Publication number
KR101128357B1
KR101128357B1 KR1020110018759A KR20110018759A KR101128357B1 KR 101128357 B1 KR101128357 B1 KR 101128357B1 KR 1020110018759 A KR1020110018759 A KR 1020110018759A KR 20110018759 A KR20110018759 A KR 20110018759A KR 101128357 B1 KR101128357 B1 KR 101128357B1
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KR
South Korea
Prior art keywords
sheet
forming
sheet member
pressing
resin layer
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KR1020110018759A
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Korean (ko)
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곽영갑
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주식회사 마그마
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Priority to KR1020110018759A priority Critical patent/KR101128357B1/en
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Publication of KR101128357B1 publication Critical patent/KR101128357B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/88—Processes specially adapted for manufacture of rectilinearly movable switches having a plurality of operating members associated with different sets of contacts, e.g. keyboards
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/14—Operating parts, e.g. push-button
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/48—Snap-action arrangements depending upon deformation of elastic members using buckling of disc springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/704—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by the layers, e.g. by their material or structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Manufacture Of Switches (AREA)
  • Push-Button Switches (AREA)

Abstract

PURPOSE: A pressurization protrusion formation method of a key pad is provided to reliably transfer pressurization force on a peak part of a movable terminal while maintaining flexibility of a sheet member, thereby maintaining good click feeling. CONSTITUTION: A forming sheet(15) includes a penetration hole(15a). The forming sheet is arranged on the surface of a sheet member(13). A pressurization protrusion(14) is arranged on the surface of the sheet member. A silicon resin layer(14a) is arranged on the surface of the forming sheet. The silicon resin layer and the forming sheet are cut from the pressurization protrusion. The cut silicon resin layer and the forming sheet are separated from the sheet member.

Description

키패드의 가압돌기 형성방법{PRESSING PROJECTIONS FORMING METHOD OF KEYPAD}PRESSING PROJECTIONS FORMING METHOD OF KEYPAD}

본 발명은 버튼부의 누름력을 돔형상 가동단자의 정점부에 집중시켜 스위치 동작이 정확하게 이루질 수 있고, 클릭감을 양호한 상태로 유지시킬 수 있도록 하는 키패드의 가압돌기 형성방법에 관한 것이다.The present invention relates to a method of forming a pressing protrusion of a keypad which concentrates the pressing force of the button portion at the apex of the dome-shaped movable terminal so that the switch operation can be made accurately and the click feeling can be maintained in a good state.

일반적으로 휴대폰과 같은 휴대용 단말기에 사용되는 키패드는 도 1에 도시된 바와 같이, 상판(1) 및 하판(2)과, 상기 하판(2) 상에 배치되고 상면에 복수개의 고정단자(4)가 형성된 기판(3)과, 상기 기판(3) 상에 배치되어 복수개의 고정단자(4)를 전기적으로 접속 또는 개방하는 것에 의해 스위치동작을 수행하는 돔형상의 가동단자(5)와, 상기 기판(3) 상에 구비되어 가동단자(5)를 유지하는 스페이서(6)와, 상기 스페이서(6) 상에 위치되는 시트부재(7)로 구성된다.In general, a keypad used in a portable terminal such as a mobile phone has an upper plate 1 and a lower plate 2, and a plurality of fixed terminals 4 disposed on the lower plate 2, as shown in FIG. 1. A dome-shaped movable terminal 5 arranged on the substrate 3 and a plurality of fixed terminals 4 electrically connected or opened to perform a switch operation, and the substrate 3 It is composed of a spacer (6) provided on the) to hold the movable terminal (5), and a seat member (7) located on the spacer (6).

따라서, 사용자가 상판(1)에 형성된 버튼부(1a)를 눌렀다가 놓는 동작에 의해 가동단자(5)의 정정부가 오목하게 탄성 변형하여 복수개의 고정단자(4)에 접속 촉 또는 이격하는 것에 의해 스위치기능이 이루어지도록 되어 있다.Therefore, by the user pressing and releasing the button portion 1a formed on the upper plate 1, the correcting portion of the movable terminal 5 is concave and elastically deformed so as to contact or spaced apart from the plurality of fixed terminals 4. The switch function is made.

또한, 가동단자(5)의 상부에 배치되는 시트부재(7)에는 가동단자(5)의 정점부 위치마다 가압돌기(7a)가 형성되고, 이 가압돌기(7a)는 버튼부(1a)의 누름력을 가동단자(5)의 정점부에 집중시켜 가동단자(5)를 확실하게 탄성 변형시킴으로써 스위치 동작이 정확하게 이루어지고 클릭감을 좋은 상태로 유지시키는 기능을 수행한다.In addition, the sheet member 7 disposed above the movable terminal 5 is provided with a pressing projection 7a for each position of the apex of the movable terminal 5, and the pressing projection 7a is formed of the button portion 1a. By concentrating the pressing force on the apex of the movable terminal 5, the movable terminal 5 is elastically deformed reliably to perform a switch operation accurately and maintain a good click feeling.

상기와 같은 가압돌기(7a)를 시트부재(7)에 형성하기 위한 종래의 방법으로는, 가압돌기(7a)를 형성하기 위한 홈이 형성된 금형(도시하지 않음)에 시트부재(7)를 장착한 후, 시트부재(7)와 금형 사이에 액상 실리콘수지를 주입시켜 경화시키는 사출성형방법이 있다. 그러나, 이러한 사출성형방법으로 가압돌기(7a)를 형성하는 경우, 도 1에 도시된 바와 같이 시트부재(7) 표면에 가압돌기(7a)와 함께 실리콘수지층(7b)이 형성된다.In the conventional method for forming the pressing protrusion 7a on the sheet member 7, the sheet member 7 is mounted in a mold (not shown) in which a groove for forming the pressing protrusion 7a is formed. Thereafter, there is an injection molding method in which a liquid silicone resin is injected and cured between the sheet member 7 and the mold. However, when the pressing projection 7a is formed by the injection molding method, as shown in FIG. 1, the silicone resin layer 7b is formed on the surface of the sheet member 7 together with the pressing projection 7a.

그러나, 상기 실리콘수지층(7b)은 시트부재(7)의 표면 전체에 형성되는 것이므로 시트부재(7)의 두께를 두껍게 하여 유연성을 저하시킬 뿐만 아니라 무게를 증가시키는 단점이 있고, 특히 가압돌기(7a)의 주위가 두꺼워짐에 따라 버튼부(1a)의 누름력을 가동단자(5)의 정점부에 집중시키는 기능이 약화되어 가동단자(5)를 정확하게 탄성 변형시키기 어렵고 클릭감을 저하시키는 문제가 발생한다.However, since the silicone resin layer 7b is formed on the entire surface of the sheet member 7, the thickness of the sheet member 7 is thickened, thereby reducing the flexibility and increasing the weight. As the circumference of 7a) becomes thicker, the function of concentrating the pressing force of the button portion 1a at the apex of the movable terminal 5 is weakened, which makes it difficult to accurately elastically deform the movable terminal 5 and lowers the feeling of click. Occurs.

또한 다른 방법으로서 도시하지는 않았지만, 가압돌기(7a)를 별도로 제작한 후, 시트부재(7)에 접착제로 직접 부착하는 방법이 있다. 이 방법은 시트부재(7)의 표면에 실리콘수지층이 형성되지 않아 상기한 문제를 해소할 수 있지만, 작은 가압돌기(7a)를 지정된 위치에 부착하기 위한 작업이 매우 번거로워 생산성을 저하시키고, 또한 공정을 자동화하기 위한 비용을 상승시키는 문제가 있다.In addition, although not illustrated as another method, there is a method of directly attaching the pressing protrusion 7a to the sheet member 7 with an adhesive. This method can solve the above problem because no silicone resin layer is formed on the surface of the sheet member 7, but the work for attaching the small pressing projection 7a to a designated position is very cumbersome, which leads to lower productivity. There is a problem of increasing the cost for automating the process.

본 발명은 상기와 같은 종래의 문제점을 해결하기 위한 것으로, 그 목적은 시트부재의 표면에 실리콘수지층이 형성되지 않도록 하면서 가압돌기를 형성함으로써 시트부재의 유연성을 유지함과 동시에 가동단자의 정점부에 누름력을 확실하게 전달하여 클릭감을 유지할 수 있으며, 또한 가압돌기의 형성공정이 간단하여 생산성을 향상시키고 제조비용을 낮출 수 있는 키패드의 가압돌기 형성방법을 제공하는데 있다. The present invention is to solve the above conventional problems, the object is to maintain the flexibility of the sheet member and at the same time at the vertex of the movable terminal by forming a pressing projection while preventing the silicone resin layer is formed on the surface of the sheet member The present invention provides a method of forming a pressurized protrusion of a keypad that can securely deliver a pressing force, thereby maintaining a feeling of click, and a process of forming a pressurized protrusion is simple, thereby improving productivity and lowering manufacturing cost.

상기의 목적을 달성하기 위한 본 발명은, 키패드의 돔형상 가동단자 상부에 위치하는 시트부재 표면에 형성되어 돔형상 가동단자의 정점부에 누름력을 집중시키는 키패드의 가압돌기 형성방법에 있어서, 상기 가압돌기를 형성하기 위한 관통구멍을 가지는 성형시트를 형성하는 제1 공정과, 상기 가압돌기를 형성하기 위한 시트부재 표면에 상기 성형시트를 얹어놓는 제2 공정과, 상기 성형시트 표면에 실리콘수지를 사출성형하여 관통구멍을 통해 시트부재 표면에 가압돌기를 형성함과 동시에 성형시트 표면에 실리콘수지층을 형성하는 제3 공정과, 상기 제3 공정에서 형성된 가압돌기의 주위를 커터로 커팅하여 가압돌기로부터 실리콘수지층과 성형시트를 절단하는 제4 공정과, 상기 절단된 실리콘수지층과 성형시트를 시트부재로부터 분리하는 제5 공정으로 이루어진 키패드의 가압돌기 형성방법에 특징이 있다.In the present invention for achieving the above object, in the method of forming a pressing projection of the keypad is formed on the surface of the seat member located above the dome-shaped movable terminal of the keypad to concentrate the pressing force on the vertex of the dome-shaped movable terminal, A first step of forming a molded sheet having a through hole for forming a pressing projection, a second step of placing the molded sheet on a surface of a sheet member for forming the pressing projection, and a silicone resin on the surface of the molded sheet The third step of forming a pressurized protrusion on the surface of the sheet member through injection molding and forming a silicone resin layer on the surface of the molded sheet, and cutting the periphery of the pressurized protrusion formed in the third process with a cutter to pressurize the pressurized protrusion. A fourth step of cutting the silicone resin layer and the molding sheet from the sheet; and a fifth step of separating the cut silicone resin layer and the molding sheet from the sheet member. It is characterized in the pressing method of forming the projection made of keypad information.

이때, 본 발명은, 상기 제1 공정에서 성형시트의 저면에 점착층을 더 형성하고, 제2 공정에서 상기 점착층을 이용하여 성형시트를 시트부재 표면에 부착하는 것이 바람직하다. At this time, it is preferable that the present invention further form an adhesive layer on the bottom surface of the molding sheet in the first step, and attach the molding sheet to the sheet member surface using the adhesive layer in the second step.

본 발명에 의한 키패드의 가압돌기 형성방법에 의하면, 가압돌기를 형성하기 위한 관통구멍이 형성된 성형시트를 개재하여 시트부재의 표면에 가압돌기를 사출성형하고, 사출성형에 의해 성형시트 표면에 형성된 실리콘수지층을 성형시트와 함께 시트부재로부터 분리하는 것에 의해 실리콘수지층이 없는 가압돌기를 시트부재 표면에 형성할 수 있다.According to the method for forming the pressing protrusion of the keypad according to the present invention, the pressing protrusion is formed on the surface of the sheet member through the molding sheet having a through hole for forming the pressing protrusion, and the silicon formed on the surface of the molding sheet by injection molding. By separating the resin layer from the sheet member together with the molded sheet, the pressurized projection without the silicone resin layer can be formed on the sheet member surface.

따라서 시트부재의 두께를 증가시키지 않아 유연성을 유지할 수 있음과 동시에 무게가 증가하는 것을 방지할 수 있으며, 가압돌기의 주위 두께가 시트부재의 두께로 유지됨에 따라 돔형상 가동단자의 정점부에 누름력을 집중시키는 기능을 정상적으로 수행할 수 있고, 이로써 가동단자의 정점부를 정확하게 탄성 변형시켜 스위치기능과 클릭감을 유지할 수 있다. 또한 가압돌기의 제조공정이 매우 간단하여 생산성을 향상시키고 제조비용을 낮출 수 있는 유용한 발명인 것이다.Therefore, it is possible to maintain flexibility by not increasing the thickness of the sheet member and to prevent the weight from increasing. The pressing force at the apex of the dome-shaped movable terminal is maintained as the thickness of the pressing protrusion is maintained at the thickness of the sheet member. The function of concentrating can be performed normally, thereby accurately elastically deforming the vertex of the movable terminal, thereby maintaining a switch function and a feeling of click. In addition, the manufacturing process of the pressurizing protrusion is very simple, it is a useful invention that can improve the productivity and lower the manufacturing cost.

도 1은 일반적인 키패드의 구성을 나타낸 단면도.
도 2는 본 발명의 방법으로 가압돌기를 형성한 시트부재와 돔형상 가동단자의 조립상태를 나타낸 분리 사시도.
도 3은 본 발명에 따른 키패드의 가압돌기 형성방법을 나타낸 공정도.1 is a cross-sectional view showing the configuration of a general keypad.
Figure 2 is an exploded perspective view showing the assembled state of the seat member and the dome-shaped movable terminal forming the pressing projection by the method of the present invention.
Figure 3 is a process chart showing a pressing projection forming method of the keypad according to the present invention.

이하, 본 발명에 따른 바람직한 실시예를 첨부도면에 의거하여 상세하게 설명한다. 도 2에 도시된 바와 같이 본 발명은 키패드의 스페이서(11)에 설치된 돔형상 가동단자(12)의 상부에 위치하는 시트부재(13) 표면에 형성되어 돔형상 가동단자(12)의 정점부에 누름력을 집중시키는 키패드의 가압돌기(14)를 형성하기 위한 방법으로, 도 3에 도시된 바와 같이 제1 내지 제5 공정으로 이루어진다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. As shown in FIG. 2, the present invention is formed on the surface of the seat member 13 located above the dome-shaped movable terminal 12 installed in the spacer 11 of the keypad, and is located at the apex of the dome-shaped movable terminal 12. As a method for forming the pressing protrusion 14 of the keypad for concentrating the pressing force, as shown in FIG. 3, the first to fifth processes are performed.

먼저 제1 공정에서는, 도 3의 (a)에서와 같이 상기 가압돌기(14)를 형성하기 위한 관통구멍(15a)을 가지는 성형시트(15)를 형성한다. 성형시트(15)는 합성수지재의 얇은 판형상으로 형성되고 시트부재(13)와 동일한 크기로 형성하는 것이 바람직하며, 관통구멍(15a)은 돔형상 가동단자(12)의 정점부와 일치하는 부분에 각각 형성한다.First, in the first step, as shown in Fig. 3 (a), the forming sheet 15 having a through hole 15a for forming the pressing projection 14 is formed. Forming sheet 15 is preferably formed in a thin plate shape of the synthetic resin material and the same size as the sheet member 13, the through hole 15a is in a portion corresponding to the apex of the dome-shaped movable terminal 12 Form each.

제2 공정에서는, 도 3의 (b)에서와 같이 상기 가압돌기(14)를 형성하기 위한 시트부재(13) 표면에 상기 성형시트(15)를 중첩시켜 놓는다.In the second step, the molding sheet 15 is superposed on the surface of the sheet member 13 for forming the pressing projection 14 as shown in FIG.

제3 공정에서는, 도 3의 (c)에서와 같이 상기 성형시트(15) 표면에 실리콘수지를 사출성형하여 관통구멍(15a)을 통해 시트부재(13) 표면에 가압돌기(14)를 형성한다. 이때 제3 공정의 사출성형은 공지의 기술로서 가압돌기(14)를 형성하기 위한 홈이 형성된 금형(도시하지 않음)에 성형시트(15)를 중첩시킨 시트부재(13)를 장착한 후, 성형시트(15)와 금형 사이에 액상 실리콘수지를 주입시켜 경화시킴으로써 이루어지고, 이러한 사출성형에 의해 성형시트(15)의 표면에는 얇은 실리콘수지층(14a)이 형성된다.In the third step, as shown in FIG. 3 (c), the silicone resin is injection molded on the surface of the molding sheet 15 to form the pressing protrusions 14 on the surface of the sheet member 13 through the through holes 15a. . At this time, the injection molding of the third step is a known technique, after mounting the sheet member 13 having the molding sheet 15 superimposed on a mold (not shown) in which a groove for forming the pressing protrusion 14 is formed, and then molding. It is made by injecting and curing a liquid silicone resin between the sheet 15 and the mold, and a thin silicone resin layer 14a is formed on the surface of the molding sheet 15 by this injection molding.

제4 공정에서는, 도 3의 (d)에서와 같이 상기 제3 공정에서 형성된 가압돌기(14)의 주위를 커터(C)로 커팅하여 가압돌기(14)로부터 실리콘수지층(14a)과 성형시트(15)를 절단한다. In the fourth step, as shown in Fig. 3D, the periphery of the pressing protrusion 14 formed in the third step is cut by the cutter C to cut the silicone resin layer 14a and the molding sheet from the pressing protrusion 14. Cut 15.

제5 공정에서는, 상기 제4 공정에서 절단된 실리콘수지층(14a)과 성형시트(15)를 시트부재(13)로부터 분리하는 것으로, 시트부재(13) 표면에 가압돌기(14)만 남게 되어 시트부재(13) 표면에 실리콘수지층(14a)이 없는 가압돌기(14)를 형성할 수 있게 된다.In the fifth step, by separating the silicone resin layer 14a and the molding sheet 15 cut in the fourth step from the sheet member 13, only the pressing projections 14 remain on the surface of the sheet member 13. It is possible to form the pressing projection 14 without the silicone resin layer 14a on the sheet member 13 surface.

한편, 본 발명은, 상기 제1 공정에 있어서 도 3의 (a)에서와 같이 성형시트(15)의 저면에 점착층(16)을 더 형성하고, 제2 공정에서는 도 3의 (b)에서와 같이 상기 점착층(16)을 이용하여 성형시트(15)를 시트부재(13) 표면에 부착하는 것이 바람직하다. 점착층(16)은 성형시트(15) 저면에 점착제를 얇게 도포하여 형성되는 것으로, 점착제의 끈적끈적한 점성을 이용하여 성형시트(15)를 시트부재(13)에 부착할 수 있고, 또한 제5 공정에서 성형시트(15)를 시트부재(13)로부터 분리할 때 쉽게 떼어낼 수 있다.On the other hand, in the first step, the present invention further forms an adhesive layer 16 on the bottom of the molding sheet 15 as shown in Fig. 3A, and in the second step in Fig. 3B. As described above, it is preferable to attach the molding sheet 15 to the surface of the sheet member 13 by using the adhesive layer 16. The adhesive layer 16 is formed by applying a thin adhesive on the bottom surface of the molding sheet 15, and can attach the molding sheet 15 to the sheet member 13 using the sticky viscosity of the adhesive. When the molding sheet 15 is separated from the sheet member 13 in the process, it can be easily removed.

이와 같이 본 발명은, 매우 간단한 방법에 의해 시트부재(13) 표면에 실리콘수지층이 없는 가압돌기(14)를 형성할 수 있고, 가압돌기(14)를 형성하는 공정이 매우 간단하여 생산성을 향상시키고 제조비용을 절감할 수 있다. As described above, according to the present invention, the pressing protrusion 14 without the silicone resin layer can be formed on the surface of the sheet member 13 by a very simple method, and the process of forming the pressing protrusion 14 is very simple, thereby improving productivity. Can reduce the manufacturing cost.

지금까지 설명된 실시예는 본 발명의 바람직한 실시예를 설명한 것에 불과하고, 본 발명의 권리범위는 설명된 실시예에 한정되는 것은 아니며, 본 발명의 기술적 사상과 특허청구범위 내에서 이 분야의 당업자에 의하여 다양한 변경, 변형 또는 치환이 가능할 것이며, 그와 같은 실시예들은 본 발명의 범위에 속하는 것으로 이해되어야 한다.It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to be illustrative of the present invention and not to be construed as limiting the scope of the present invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

12 : 가동단자 13 : 시트부재
14 : 가압돌기 14a : 실리콘수지층
15 : 성형시트 15a : 관통구멍
16 : 점착층12: movable terminal 13: sheet member
14: pressing projection 14a: silicone resin layer
15: forming sheet 15a: through hole
16: adhesion layer

Claims (2)

키패드의 돔형상 가동단자 상부에 위치하는 시트부재 표면에 형성되어 돔형상 가동단자의 정점부에 누름력을 집중시키는 키패드의 가압돌기 형성방법에 있어서,
상기 가압돌기를 형성하기 위한 관통구멍을 가지는 성형시트를 형성하는 제1 공정과,
상기 가압돌기를 형성하기 위한 시트부재 표면에 상기 성형시트를 얹어놓는 제2 공정과,
상기 성형시트 표면에 실리콘수지를 사출성형하여 관통구멍을 통해 시트부재 표면에 가압돌기를 형성함과 동시에 성형시트 표면에 실리콘수지층을 형성하는 제3 공정과,
상기 제3 공정에서 형성된 가압돌기의 주위를 커터로 커팅하여 가압돌기로부터 실리콘수지층과 성형시트를 절단하는 제4 공정과,
상기 절단된 실리콘수지층과 성형시트를 시트부재로부터 분리하는 제5 공정으로 이루어지는 것을 특징으로 하는 키패드의 가압돌기 형성방법.In the method of forming a pressing projection of the keypad is formed on the surface of the seat member located above the dome-shaped movable terminal of the keypad to concentrate the pressing force on the vertex of the dome-shaped movable terminal,
A first step of forming a molded sheet having a through hole for forming the pressing protrusion;
A second step of placing the molding sheet on a surface of a sheet member for forming the pressing protrusion;
A third step of forming a silicone resin layer on the surface of the molded sheet while simultaneously forming a pressing protrusion on the surface of the sheet member through a through hole by injection molding the silicone resin on the surface of the molded sheet;
A fourth step of cutting the silicone resin layer and the molding sheet from the pressure protrusion by cutting the periphery of the pressure protrusion formed in the third process with a cutter;
And a fifth step of separating the cut silicon resin layer and the molded sheet from the sheet member. 제 1 항에 있어서, 상기 제1 공정에서 성형시트의 저면에 점착층을 더 형성하고, 제2 공정에서 상기 점착층을 이용하여 성형시트를 시트부재 표면에 부착하는 것을 특징으로 하는 키패드의 가압돌기 형성방법.2. The keypad as claimed in claim 1, further comprising: forming an adhesive layer on the bottom surface of the molding sheet in the first step, and attaching the molding sheet to the sheet member surface using the adhesive layer in the second step. Formation method.
KR1020110018759A 2011-03-03 2011-03-03 Pressing projections forming method of keypad KR101128357B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210109388A (en) * 2020-02-27 2021-09-06 주식회사 시노펙스 A method of manufacturing the boss film of dom switch

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Publication number Priority date Publication date Assignee Title
KR200407209Y1 (en) * 2005-11-16 2006-01-25 주식회사 신화엠에스 cellular phone keypad
KR200407211Y1 (en) * 2005-11-16 2006-01-25 주식회사 신화엠에스 cellular phone keypad
KR20080004654U (en) * 2007-04-11 2008-10-15 (주)유비엠메카트로닉 Key pad assembly having sheet formed of pressing projections on top of dome switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200407209Y1 (en) * 2005-11-16 2006-01-25 주식회사 신화엠에스 cellular phone keypad
KR200407211Y1 (en) * 2005-11-16 2006-01-25 주식회사 신화엠에스 cellular phone keypad
KR20080004654U (en) * 2007-04-11 2008-10-15 (주)유비엠메카트로닉 Key pad assembly having sheet formed of pressing projections on top of dome switch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210109388A (en) * 2020-02-27 2021-09-06 주식회사 시노펙스 A method of manufacturing the boss film of dom switch
KR102622090B1 (en) 2020-02-27 2024-01-09 주식회사 시노펙스 A method of manufacturing the boss film of dom switch

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