Crystal for a telephone watch

• US 20010014618A1
• Filed: 01/24/2001
• Published: 08/16/2001
• Est. Priority Date: 02/02/2000
• Status: Active Grant

• Current Assignee: Asulab SA (The Swatch Group AG)
• Original Assignee: Asulab SA (The Swatch Group AG)
• Inventors: Mignot, Jean-Pierre, Dubugnon, Dominique, Martin, Jean-Claude
• Granted Patent: US 7,167,689 B2
• Time in Patent Office: Days
• US Class Current: 455/575.1
• CPC Class Codes: G04G 21/04 using radio waves radio-controlled time-pieces G04R
• CPC Class Codes: G04G 21/08 Touch switches specially adapted for time-pieces
• CPC Class Codes: H04B 1/385 Transceivers carried on the body, e.g. in helmets

Abstract

The telephone watch includes a crystal (1) including a keyboard (2) formed in particular of a plurality of capacitive sensors (3) disposed under the crystal. This crystal includes a thick zone (4) at its center and a thinned zone (5) at its periphery. The keyboard (2) is deposited under the thinned zone (5).

Claims

1. A crystal in particular for a telephone watch including a keyboard formed in particular of a plurality of capacitive sensors disposed under a lower face of the crystal, said crystal including a thick zone and a thinned zone, the keyboard being deposited in the thinned zone.

2. A crystal according to

claim 1

, wherein the thinned zone is arranged on the side of the crystal lower face.

3. A crystal according to

claim 1

or

2

, wherein the thick zone is disposed at its centre and in that the thinned zone is disposed at its periphery.

4. A crystal according to

claim 1

,

2

or 3, wherein it is round and wherein the thinned zone forms a ring under which the keyboard is deposited.

5. A crystal according to

claim 1

, wherein the keyboard includes a first decorative opaque layer formed of numbers and signs and deposited directly under the thinned zone, and a second layer deposited under the first and formed of a plurality of conductive pads, a conductive pads corresponding to each number or sign, said conductive pads being individually connected to a printed circuit.

6. A crystal according to

claim 1

, wherein it is secured onto a bezel including an inner reinforcement extending under the thinned zone of the crystal, the keyboard being sandwiched between said thinned zone and said reinforcement.