Packaging structure for depression switches
A packaging structure for depression switches includes an electronic substrate containing at least one switch electrode, a push-on switch located on the electronic substrate to connect the switch electrode to generate a command signal and a sealing member. The push-on switch and the electronic substrate form a first air chamber between them. The sealing member has a fastening portion to seal the push-on switch on the electronic substrate and a second air chamber formed with the electronic substrate to communicate with the first air chamber. By depressing the push-on switch to connect the switch electrode, air held in the first air chamber is squeezed and flows to the second air chamber without escaping.
1. A packaging structure for depression switches, comprising:
an electronic substrate which has at least one switch electrode;
a push-on switch located on the electronic substrate to connect the switch electrode to generate a command signal and form a first air chamber with the electronic substrate; and
a sealing member which has a fastening portion to seal the push-on switch on the electronic substrate and a second air chamber formed with the electronic substrate to communicate only with the first air chamber;
wherein connection of the switch electrode through the push-on switch causes the first air chamber to be squeezed and air in the first air chamber to flow into the second air chamber.
2. The packaging structure of claim 1 , wherein the second air chamber is located in the fastening portion.
3. The packaging structure of claim 1 , wherein the second air chamber is formed in a size proximate to the first air chamber.
4. The packaging structure of claim 1 , wherein the fastening portion and the electronic substrate form a bounding surface which has an adhesive layer located thereon.
5. The packaging structure of claim 1 , wherein the fastening portion is bonded to the electronic substrate and push-on switch at a bonding surface with an adhesive layer formed thereon.
6. The packaging structure of claim 1 , wherein the fastening portion has a depressing zone encasing the push-on switch.
7. An electronic device comprises the packaging structure of claim 1 .
8. The electronic device of claim 7 , wherein the electronic device is selectively an IC card or a RFID tag.
9. The packaging structure of claim 1 , wherein the second air chamber is not formed over a switch.