A dome module with high temperature resistant buttons and its production process

Abstract

The invention discloses a dome module for high-temperature resistant buttons, comprising a PET film, a dome spring adhered to one side of the PET film by double-sided tape, and a convex point pressed on the other side of the PET film, wherein the convex point faces the center of the dome spring point. The dome module of the invention can withstand a high temperature of up to 300°C, and the dome mold base adopts a modular design, which is convenient for production and precise assembly. By arranging convex points on the outer side of the PET film, the convex points are first pressed to deform the middle part of the dome spring point and then trigger the connection of the circuit. This design can improve the accuracy of button pressing and avoid the failure to trigger the spring point deformation due to inaccurate pressing position. The invention also discloses a production process for producing the dome module for high-temperature resistant buttons, comprising: pre-treating a release film A, pre-treating the double-sided tape, pre-treating the high-temperature PET film, pre-pressing the convex points, pressing the convex points, first compounding, second compounding, attaching the dome spring point, and cutting the shape. The dome module processed by the production process of the invention has stable quality, low scrap rate and good uniformity.

Description

Technical field

[0001] The present invention relates to a dome module with high-temperature resistant buttons and also relates to a production process of the dome module. [Background Technology]

[0002] The existing key module includes a dome module composed of three dome springs and terminals for mounting the dome springs and a circuit board. The existing dome module generally fails when the temperature exceeds 120°C and is difficult to be used in an environment with a temperature of 300°C.

[0003] The present invention is proposed in view of the deficiencies in the prior art. [Summary of the invention]

[0004] To solve the above technical problems, the present invention provides a dome module for high-temperature resistant buttons, comprising a PET film, a dome spring adhered to one side of the PET film by double-sided tape, and a convex point pressed onto the other side of the PET film, wherein the convex point faces the center of the dome spring point.

[0005] In the dome module with a high-temperature resistant button as described above, the PET film is a high-temperature resistant PET film.

[0006] In the dome module for high-temperature-resistant buttons as described above, the protrusions are cylindrical, and the thickness of the protrusions is 0.10 mm to 1.00 mm, and the diameter of the protrusions is 0.3 mm to 3.0 mm.

[0007] In the above-mentioned dome module for high-temperature-resistant buttons, the protrusions are made of PET material.

[0008] The present invention also provides a production process for producing the above-mentioned dome module, comprising the following steps:

[0009] S01: Pretreatment, which includes: pretreatment of release film A, pretreatment of double-sided tape and pretreatment of high-temperature PET film, among which,

[0010] Pre-treating the release film A: first, laminating the protective film A on the silicone oil side of the release film A, then using a die-cutting machine to cut side holes and dome positioning holes on the edge of the release film A, and then laminating the protective film B on the non-silicone oil side of the release film A to obtain a semi-finished product A;

[0011] Pre-process the double-sided tape by first using a die-cutting machine to cut out side holes on the double-sided tape, then cutting the edge of the double-sided tape, and then cutting the positioning holes all over the double-sided tape to obtain semi-finished product B;

[0012] Pre-treating the high-temperature PET film: First, select transfer film A and punch out edge holes on transfer film A. Then, use a die-cutting machine to punch out the edges from the release film surface of transfer film A, ensuring that transfer film A is not cut through. Then, remove the release film from transfer film A, and laminate the high-temperature PET film onto the adhesive surface of transfer film A. Finally, punch out positioning holes on the high-temperature PET film and transfer film A to obtain semi-finished product C.

[0013] S02: Pre-pressing the bumps. A fully automatic dotting machine is used to first position the bumps on a jig. Then, the high-temperature PET film of semi-finished product C faces downward and is pressed using a press machine. The bumps are pressed onto the bottom of the high-temperature PET film of semi-finished product C to obtain semi-finished product D.

[0014] S03: Pressing the bumps: Using an FPC pressing machine, press the bumps on the semi-finished product D for the second time to obtain a semi-finished product E;

[0015] S04: First lamination: first, the semi-finished product E is positioned on the jig with the convex point facing downwards, and then the semi-finished product B with the thin release film removed is pasted on the semi-finished product E to obtain the semi-finished product F;

[0016] S05: Second lamination, first remove the thick release film on the semi-finished product F, take the release film A on the semi-finished product A, then align the semi-finished product F with the thick release film removed and the semi-finished product A with the release film A removed, and then laminarize to obtain a semi-finished product G;

[0017] S06: attaching the dome shrapnel, first remove the release film B on the semi-finished product G, then accurately attach the dome shrapnel to the semi-finished product G, ensuring that the dome shrapnel is located in the dome positioning hole (102), and then attach the dome shrapnel composite protective film D to the semi-finished product G to obtain the semi-finished product H;

[0018] S07: Cut the shape. According to the design drawing, punch out the shape of the semi-finished product H. It is required that the release film A is not cut. After the waste is discharged, the surface of the product is covered with the transfer film B to obtain the finished product.

[0019] In the production process of the dome module as described above, in step S02, when cutting the edge of the double-sided tape, ensure that the thin release film of the double-sided tape is cut off from the double-sided tape, and the thick release film of the double-sided tape is retained.

[0020] In the production process of the dome module as described above, in step S04, the pressing temperature is 185° C. to 195° C., the pressing pressure is 0.15 MPa to 0.25 MPa, the pre-pressing is 9 seconds to 11 seconds, and the holding pressure is 14 seconds to 16 seconds.

[0021] In the production process of the dome module as described above, in step S05, the pressing temperature is 185°C to 195°C, the pressing pressure is 135 to 145 kg, the pre-pressing is 9 seconds to 11 seconds, the holding pressure is 145 seconds to 155 seconds, the curing temperature is 155°C to 165°C, and the curing duration is 55 minutes to 65 minutes.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The dome module of the present invention uses a PET film as its base, and the dome spring is attached to the PET film with double-sided tape. This design can withstand temperatures up to 300°C. In addition, the dome mold base adopts a modular design, which facilitates production and precise assembly. By providing raised points on the outer side of the PET film, pressing the raised points first deforms the middle part of the dome spring and then triggers the circuit to be connected. This design can improve the accuracy of key pressing and avoid inaccurate pressing positions that fail to trigger spring deformation.

[0024] 2. The dome modules processed by the production process of the present invention have stable quality, low scrap rate and good uniformity.

Brief Description of the Drawings

[0025] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0026] Figure 1 This is a schematic diagram of the dome module structure of the present invention;

[0027] Figure 2 This is an exploded schematic diagram of the dome module of the present invention;

[0028] Figure 3 is a full cross-sectional schematic diagram of the dome module of the present invention;

[0029] Figure 4 A schematic structural diagram of a finished product produced using the production process of the present invention;

[0030] Figure 5 This is a schematic diagram of an exploded view of a finished product produced using the production process of the present invention. [Specific implementation method]

[0031] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] like Figures 1 to 3As shown, a dome module 1000 for a high-temperature resistant button in this embodiment includes a PET film 1, a dome spring 3 attached to one side of the PET film 1 by double-sided tape 2, and a protrusion 4 pressed on the other side of the PET film 1, wherein the protrusion 4 is directly opposite to the center of the dome spring 3, and the PET film 1 is a high-temperature resistant PET film. The dome module of the present invention uses a PET film as a base, and the dome spring is attached to the PET film by double-sided tape. This design can withstand temperatures of up to 300°C, and the dome mold base adopts a modular design, which is easy to produce and accurately assemble. By setting a protrusion on the outside of the PET film, pressing the protrusion first to deform the middle part of the dome spring and then triggering the circuit to be connected, this design can improve the accuracy of button pressing and avoid inaccurate pressing position that fails to trigger spring deformation.

[0033] In this embodiment, the bumps 4 are made of PET material, are cylindrical, have a thickness of 0.10 mm to 1.00 mm, and have a diameter of 0.3 mm to 3.0 mm.

[0034] This embodiment also discloses a production process for producing the above-mentioned dome module, comprising the following steps:

[0035] S01: Pretreatment, which includes: pretreatment of release film A5, pretreatment of double-sided tape 2 and pretreatment of high-temperature PET film 1, wherein:

[0036] Pre-treat release film A5. Select a 75 μm thick, blue release film A. First, laminate protective film A onto the silicone oil side of release film A5. Protective film A can be 60100# orange protective film. Then, use a die-cutting machine to cut side holes 101 and dome positioning holes 102 on the edge of release film A5. Then, laminate protective film B onto the non-silicone oil side of release film A5. Protective film B can be 6060# protective film. This yields semi-finished product A.

[0037] Pre-process double-sided tape 2. Select gold double-sided tape with a thickness of 0.035 mm. First, use a die-cutting machine to cut out edge holes on double-sided tape 2. Then, cut the edge lines of double-sided tape 2. Finally, cut the positioning holes all over double-sided tape 2 to obtain semi-finished product B.

[0038] Pre-treating the high-temperature PET film 1: First, select a transfer film A with a thickness of 75 μm and punch out edge holes on the transfer film A. Then, use a die-cutting machine to punch out the edge lines from the release film surface of the transfer film A, ensuring that the transfer film A is not cut through. Then, remove the release film from the transfer film A, and laminate a high-temperature PET film with a thickness of 25 μm on the adhesive surface of the transfer film A. Then, punch out positioning holes on the high-temperature PET film and the transfer film A. After the punched positioning holes, wipe the surface of the high-temperature PET film with alcohol to obtain a semi-finished product C.

[0039] S02: Pre-pressing the bumps 4, using a fully automatic dotting machine, first positioning the bumps 4 on a jig, then placing the high-temperature PET film of semi-finished product C facing downwards, and pressing using a press machine, so that the bumps 4 are pressed against the bottom of the high-temperature PET film of semi-finished product C, to obtain semi-finished product D;

[0040] S03: Pressing the bump 4, using an FPC pressing machine, presses the bump 4 on the semi-finished product D for the second time to obtain a semi-finished product E;

[0041] S04: First lamination: first, the semi-finished product E is positioned on the jig with the bump 4 facing downwards, and then the semi-finished product B with the thin release film removed is pasted on the semi-finished product E to obtain the semi-finished product F;

[0042] S05: Second lamination, first remove the thick release film on the semi-finished product F, take the release film A on the semi-finished product A, then align the semi-finished product F with the thick release film removed and the semi-finished product A with the release film A removed, and then laminarize to obtain a semi-finished product G;

[0043] S06: attaching the dome spring 3. First, remove the release film B on the semi-finished product G. Then, accurately attach the dome spring 3 to the semi-finished product G, ensuring that the dome spring 3 is located in the dome positioning hole 102. Then, attach the composite protective film D7 of the dome spring 3 to the semi-finished product G to obtain the semi-finished product H.

[0044] S07: Cut the shape. According to the design drawing, the semi-finished product H is punched out. Cutting the shape means cutting the excess PET film and double-sided tape to meet the shape requirements of the dome module. When cutting the shape, the release film A5 is not cut. After the waste is discharged, the surface of the product is covered with the transfer film B6 to obtain the finished product. The dome module is located between the release film A and the transfer film B to facilitate the subsequent assembly of the dome module. The finished product is as follows: Figure 4 and Figure 5 shown.

[0045] The dome modules processed by the production process of the present invention have stable quality, low scrap rate and good uniformity.

[0046] In this embodiment, in step S02 , when cutting the edge of the double-sided adhesive tape 2 , ensure that the thin release film of the double-sided adhesive tape 2 is cut off from the double-sided adhesive tape, and retain the thick release film of the double-sided adhesive tape 2 .

[0047] In this embodiment, in step S04, the pressing temperature is 185° C. to 195° C., the pressing pressure is 0.15 MPa to 0.25 MPa, the pre-pressing is 9 seconds to 11 seconds, and the holding pressure is 14 seconds to 16 seconds.

[0048] In this embodiment, in step S05, the pressing temperature is 185°C to 195°C, the pressing pressure is 135 to 145 kg, the pre-pressing is 9S to 11S, the holding pressure is 145S to 155S, the curing temperature is 155°C to 165°C, and the curing duration is 55min to 65min.

[0049] The above examples are merely provided to further illustrate the technical content of the present invention for easier understanding by the reader, but do not limit the embodiments of the present invention to these examples. Any extension or re-creation of the technology based on the present invention is protected by the present invention. The scope of protection of the present invention shall be determined by the claims.

Claims

1. A production process for a dome module (1000) with a high temperature resistant key, characterized in that It comprises a PET film (1), a dome shrapnel (3) adhered to one side of the PET film (1) by a double-sided adhesive tape (2), and a convex point (4) pressed on the other side of the PET film (1), wherein the convex point (4) faces the center of the dome shrapnel (3); The following steps are included: S01: Pretreatment, the pretreatment includes: pretreatment of release film A (5), pretreatment of double-sided adhesive tape (2) and pretreatment of high-temperature PET film (1), wherein, Pre-treating the release film A (5), firstly laminating the protective film A on the silicone oil surface of the release film A (5), then using a die-cutting machine to cut out a side hole (101) and a dome positioning hole (102) on the edge of the release film A (5), and then laminating the protective film B on the non-silicone oil surface of the release film A (5) to obtain a semi-finished product A; Pre-processing the double-sided adhesive tape (2), first using a die-cutting machine to cut a side hole on the double-sided adhesive tape (2), then cutting the side line of the double-sided adhesive tape (2), and then fully cutting the positioning hole on the double-sided adhesive tape (2) to obtain a semi-finished product B; Pre-treating the high-temperature PET film (1), first selecting a transfer film A and punching a side hole on the transfer film A, then using a die-cutting machine to punch a side line from the release film surface of the transfer film A, ensuring that the transfer film A is not cut through, then removing the release film on the transfer film A, laminating the high-temperature PET film on the adhesive surface of the transfer film A, and then punching positioning holes on the high-temperature PET film and the transfer film A to obtain a semi-finished product C; S02: Pre-pressing the convex point (4) using a fully automatic dotting machine, first positioning the convex point (4) on the jig, then placing the high-temperature PET film of the semi-finished product C downwards, and pressing it using a pressing machine so that the convex point (4) is pressed on the bottom of the high-temperature PET film of the semi-finished product C, thereby obtaining a semi-finished product D; S03: Pressing the bumps (4), using an FPC pressing machine, presses the bumps (4) on the semi-finished product D for a second time to obtain a semi-finished product E; S04: First composite, first, the convex point (4) of the semi-finished product E is positioned downward on the jig, and then the semi-finished product B with the thin release film removed is pasted on the semi-finished product E to obtain the semi-finished product F; S05: Second lamination, first remove the thick release film on the semi-finished product F, take the release film A on the semi-finished product A, then align the semi-finished product F with the thick release film removed and the semi-finished product A with the release film A removed, and then laminarize to obtain a semi-finished product G; S06: attaching the dome shrapnel (3), first remove the release film B on the semi-finished product G, then accurately attach the dome shrapnel (3) to the semi-finished product G, ensuring that the dome shrapnel (3) is located in the dome positioning hole (102), and then attach the dome shrapnel (3) and the composite protective film D (7) to the semi-finished product G to obtain the semi-finished product H; S07: Cut the shape. Punch the shape of the semi-finished product H according to the design drawing. It is required that the release film A (5) is not cut. After the waste is discharged, the surface of the product is covered with the transfer film B (6) to obtain the finished product.

2. The production process of a dome module for high temperature resistant buttons according to claim 1, characterized in that The PET film (1) is a high-temperature resistant PET film.

3. The production process of a dome module for high temperature resistant buttons according to claim 1, characterized in that The convex point (4) is cylindrical, and the thickness of the convex point (4) is 0.10mm-1.00mm, and the diameter of the convex point (4) is 0.3mm-3.0mm.

4. The production process of a dome module for high temperature resistant buttons according to claim 3, characterized in that The protrusions (4) are made of PET material.

5. The production process of a dome module for high temperature resistant buttons according to claim 1, characterized in that In step S02, when cutting the edge of the double-sided adhesive tape (2), ensure that the thin release film of the double-sided adhesive tape (2) is cut off from the double-sided adhesive tape, and retain the thick release film of the double-sided adhesive tape (2).

6. The production process of a dome module for high temperature resistant buttons according to claim 1, characterized in that In step S04 , the pressing temperature is 185° C. to 195° C., the pressing pressure is 0.15 MPa to 0.25 MPa, the pre-pressing is 9 seconds to 11 seconds, and the holding pressure is 14 seconds to 16 seconds.

7. The production process of a dome module for high temperature resistant buttons according to claim 1, characterized in that In step S05 , the pressing temperature is 185° C. to 195° C., the pressing pressure is 135 to 145 kg, the pre-pressing time is 9 seconds to 11 seconds, the holding time is 145 seconds to 155 seconds, the curing temperature is 155° C. to 165° C., and the curing time is 55 minutes to 65 minutes.

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