Electronic quartz resonator module provided with shock resistant securing means

Patent metadata

Field	Value
Publication number	US-9429915-B2
Application number	US-201313939737-A
Country	US
Kind code	B2
Filing date	Jul 11, 2013
Priority date	Jul 16, 2012
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

The electronic module ( 1 ) includes a quartz or MEMS resonator ( 3 ), which is confined within a resonator case ( 5 ), which is provided with electrical contact pads ( 15 ) over at least one external surface for the electrical connection of the resonator. A printed circuit board ( 6 ) is also provided for carrying the resonator case ( 5 ) and it includes electrical connection terminals ( 18 ) for connection to the electrical connection pads ( 15 ) of the resonator case. The resonator case ( 5 ) is fixedly held inside a case structure ( 6, 9 ) of the electronic module ( 1 ), via at least one mechanical shock damping element ( 7 ). The damping element 7 ) may be an elastomer element, which includes metal wires ( 17 ) for the electrical connection of the resonator case ( 5 ) across the printed circuit board ( 6 ).

First claim

What is claimed is:

1. An electronic module with a quartz or MEMS resonator, said module comprising:
the quartz or MEMS resonator confined within a resonator case, which is provided with electrical contact pads over at least one external surface of the resonator case, for the electrical connection of the resonator,
a printed circuit board for carrying the resonator case and including electrical connection terminals for connection to the electrical contact pads of the resonator case,
wherein the resonator case is fixedly held in a case structure of the electronic module, sandwiched between two elements for damping mechanical shocks, and wherein the damping elements hold the resonator case and are compressed between two internal walls of the case structure of the electronic module,
wherein the electrical contact pads of the resonator case are secured straight to the electrical connection terminals of the printed circuit board which is flexible,
wherein the resonator case fixed to the flexible printed circuit board is fixedly held in the case structure of the electronic module sandwiched between the two damping elements, the first damping element of which is in contact with an inner surface of a base of the case structure, and the second damping element of which is in contact with an inner surface of a cover of the case structure, which is secured to the base,
wherein the electrical connection terminals of the printed circuit board are positioned on a top surface of the printed circuit board between the top surface of the printed circuit board and a bottom surface of the resonator case,
wherein the first damping element is in contact with a bottom surface of the printed circuit board opposite to the top surface of the printed circuit board,
wherein the flexible printed circuit board is connected to another rigid printed circuit board carrying other electronic components, and
wherein the flexible printed circuit board and the rigid printed circuit board form a single part with the flexible printed circuit having a smaller thickness than the rigid printed circuit board, wherein a connection portion of the flexible and rigid printed circuit boards is disposed in a passage between two cavities of the case structure.

2. The electronic module according to claim 1 , wherein the damping elements are formed by one or more elastomer elements.

3. The electronic module according to claim 2 , wherein a first elastomer element is in contact across an entire bottom surface of the resonator case, and wherein a second elastomer element is in contact across an entire top surface of the resonator case.

4. The electronic module according to claim 1 , wherein the two damping elements are elastomer elements which are compressed between the inner surface of the base and the inner surface of the cover.

5. The electronic module according to claim 1 , wherein the resonator case and the damping elements are disposed inside the first cavity of the case structure of the electronic module, and wherein one or several electronic components connected across the printed circuit board are disposed inside the second cavity of the case structure of the electronic module.

6. The electronic module according to claim 1 , wherein the resonator case includes the quartz or MEMS resonator and an integrated timepiece circuit.

7. An electronic module with a quartz or MEMS resonator, said module comprising:
the quartz or MEMS resonator confined within a resonator case, which is provided with electrical contact pads over at least one external surface of the resonator case, for the electrical connection of the resonator,
at least one flexible printed circuit board for carrying the resonator case and including electrical connection terminals for connection to the electrical contact pads of the resonator case,
wherein the resonator case is fixedly held in a case structure of the electronic module, sandwiched between two elements for damping mechanical shocks, and wherein the damping elements hold the resonator case and are compressed between two internal walls of the case structure of the electronic module,
wherein the electrical contact pads of the resonator case are secured straight to the electrical connection terminals of the printed circuit board which is flexible,
wherein the resonator case fixed to the flexible printed circuit board is fixedly held in the case structure of the electronic module sandwiched between the two damping elements, the first damping element of which is in contact with an inner surface of a base of the case structure, and the second damping element of which is in contact with an inner surface of a cover of the case structure, which is secured to the base,
wherein the electrical connection terminals of the printed circuit board are positioned on a top surface of the printed circuit board between the top surface of the printed circuit board and a bottom surface of the resonator case,
wherein the first damping element is in contact with a bottom surface of the circuit board opposite to the top surface of the printed circuit hoard,
wherein the flexible printed circuit board is connected to another rigid printed circuit board carrying other electronic components, said flexible printed circuit board having a smaller thickness than the rigid printed circuit board,
wherein the resonator case and the damping elements are disposed inside a first cavity of the case structure of the electronic module, and
wherein the rigid printed circuit board with electronic components are disposed inside a second cavity of the case structure of the electronic module, wherein a connection portion of the flexible and rigid printed circuit boards is disposed in a passage between the two cavities of the case structure.

8. The electronic module according to claim 7 , herein the flexible printed circuit hoard and the rigid printed circuit board form a single part.

Assignees

• Eta Sa Mft Horlogere Suisse

Inventors

• Klopfenstein Francois

Classifications

• G04B17/00 Primary

  Mechanisms for stabilising frequency {(for setting frequency G04B18/00; magnetic G04C5/005; in striking mechanisms G04B21/06; stopping and regulating of the running G04B23/023; electrically driven mechanical regulation G04C3/165; electrical and thermo-electric regulating mechanisms G04C5/00)} · CPC title

• G04F5/063 Primary

  Constructional details · CPC title

• G04G17/06

  Electric connectors, e.g. conductive elastomers · CPC title

• G04F5/06

  using piezoelectric resonators · CPC title

• H03B5/36

  active element in amplifier being semiconductor device ({H03B5/323, H03B5/326} , H03B5/38 take precedence) · CPC title