Touch pad structure

Patent metadata

Field	Value
Publication number	US-2021151267-A1
Application number	US-202016905921-A
Country	US
Kind code	A1
Filing date	Jun 19, 2020
Priority date	Nov 20, 2019
Publication date	May 20, 2021
Grant date	—

Abstract

A touch pad structure includes a touch pad, a dome switch, and a buffer film. The touch pad includes a fulcrum end and a moving end opposite to the fulcrum end, and the touch pad has an outer surface and an inner surface opposite to the outer surface. The dome switch is disposed at the moving end and connected to the inner surface of the touch pad. The dome switch includes a switch body and a convex portion protruding from the switch body. The buffer film is attached to the inner surface of the touch pad and the dome switch. The buffer film covers the dome switch and has a perforation, and the convex portion of the dome switch is located inside the perforation.

First claim

What is claimed is:

1 . A touch pad structure, comprising:
a touch pad, comprising a fulcrum end and a moving end opposite to the fulcrum end, the touch pad having an outer surface and an inner surface opposite to the outer surface; a dome switch, disposed at the moving end and connected to the inner surface of the touch pad, the dome switch comprising a switch body and a convex portion protruding from the switch body; and a buffer film, attached to the inner surface of the touch pad and the dome switch and covering the dome switch, wherein the buffer film has a perforation, and the convex portion of the dome switch is located inside the perforation.

2 . The touch pad structure according to claim 1 , wherein the switch body has a surface facing away from the touch pad, the convex portion protrudes from the surface, and the buffer film is attached to and covers the surface.

3 . The touch pad structure according to claim 1 , wherein the convex portion penetrates the perforation.

4 . The touch pad structure according to claim 1 , wherein the buffer film comprises an adhesive layer and a buffer layer connecting the adhesive layer, the adhesive layer is attached to the inner surface of the touch pad and the dome switch, and the adhesive layer is located between the dome switch and the buffer layer.

5 . The touch pad structure according to claim 1 , wherein the buffer film further has at least one through slot, and the at least one through slot is located on a side of the perforation.

6 . The touch pad structure according to claim 5 , wherein the at least one through slot surrounds the perforation.

7 . The touch pad structure according to claim 5 , wherein the at least one through slot is connected to the perforation.

8 . The touch pad structure according to claim 1 , further comprising:
a trigger boss, facing the inner surface of the touch pad, the trigger boss being aligned to the convex portion of the dome switch.

9 . The touch pad structure according to claim 8 , wherein the trigger boss contacts the convex portion of the dome switch.

10 . The touch pad structure according to claim 1 , wherein the buffer film comprises a first portion and a second portion, the first portion surrounds the second portion, the first portion is attached to the inner surface of the touch pad, the second portion is attached to and covers the dome switch, and the perforation penetrates the second portion.

Assignees

• Acer Inc

Inventors

• Pai Ting-Wen
• Tai Wen-Chieh
• Ling Cheng-Nan
• Liu Chih-Chun
• Su Hung-Jen

Classifications

• H01H2215/02

  Reversed domes · CPC title

• H01H2221/05

  Force concentrator; Actuating dimple · CPC title

• G06F3/03547 Primary

  Touch pads, in which fingers can move on a surface · CPC title

• H01H2231/002

  Calculator, computer · CPC title

• H01H21/18 Primary

  Movable parts; Contacts mounted thereon · CPC title