Claims
- 1. A method for manufacturing a push button switch cover, comprising the steps of:
providing a cover substrate having a front surface with at least one key top and a rear surface with at least one pressing projection that corresponds to said key top; applying an adhesive to said pressing projection to form an adhesive section on said pressing projection; carrying said cover substrate to a dish-shaped metal spring feed position while keeping said pressing projection facing up; and pressing a dish-shaped metal spring onto said pressing projection corresponding thereto while aligning a central portion of said pressing projection with an apex of said dish-shaped metal spring, whereby said dish-shaped metal spring is bonded to said pressing projection through said adhesive section.
- 2. A method for manufacturing a push button switch cover as defined in claim 1, wherein said adhesive comprises an elastic adhesive having an elongation of 75 to 700% in an amount of 2 to 7 mg.
- 3. A method for manufacturing a push button switch cover as defined in claim 2, wherein said elastic adhesive has an elongation of 75 to 250%.
- 4. A method for manufacturing a push button switch cover as defined in claim 2, wherein said elastic adhesive has an initial viscosity of 20 to 150 Pa's.
- 5. A method for manufacturing a push button switch cover as defined in claim 4, wherein said elastic adhesive has an initial viscosity of 30 to 100 Pa's.
- 6. A method for manufacturing a push button switch cover as defined in claim 2, wherein said elastic adhesive is constituted of 100 parts by weight of a main adhesive ingredient and 5 to 50 parts by weight of a silicone adhesive ingredient.
- 7. A method for manufacturing a push button switch cover as defined in claim 2, wherein said cover substrate is made of silicone rubber having a Shore A hardness of 40 to 70;
said pressing projection is integrally formed on said cover substrate; and said elastic adhesive section has a Shore A hardness of 20 to 90.
- 8. A method for manufacturing a push button switch cover as defined in claim 2, wherein said pressing projection is integrally formed on said rear surface of said cover substrate; and
said key top is integrally formed on said front surface of said cover substrate.
- 9. A method for manufacturing a push button switch cover as defined in claim 2, wherein said pressing projection is integrally formed on said rear surface of said cover substrate; and
said key top is made of a resin material and bonded to said front surface of said cover substrate.
Priority Claims (2)
Number |
Date |
Country |
Kind |
10-364919 |
Dec 1998 |
JP |
|
11-84941 |
Mar 1999 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present application is a divisional of U.S. patent application Ser. No. 09/436,412 filed Nov. 9, 1999, the disclosure of which is hereby incorporated by reference herein.
Divisions (1)
|
Number |
Date |
Country |
Parent |
09436412 |
Nov 1999 |
US |
Child |
09851756 |
May 2001 |
US |