Latch assembly

Patent metadata

Field	Value
Publication number	US-9290972-B2
Application number	US-201314053675-A
Country	US
Kind code	B2
Filing date	Oct 15, 2013
Priority date	Oct 15, 2013
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

A latch assembly is provided. The latch assembly includes a stator and a mover. Magnets are mounted to the stator and/or the mover. The magnets assist with holding the latch mechanism is in a closed position. A position and orientation of the magnets also assists with shaping the force required to open the latch mechanism.

First claim

What is claimed is:

1. A latch mechanism, comprising:
a stator having a first end portion and a second end portion;
a first magnet positioned at the first end portion of the stator, the first magnet having an outer surface and a central axis;
a second magnet positioned at the second end portion of the stator, the second magnet having an outer surface and a central axis;
a mover having a first end portion and a second end portion;
a third magnet positioned at the first end portion of the mover, the third magnet having an outer surface and a central axis, the outer surface of the third magnet positioned at the outer surface of the first magnet when the latch mechanism is in a closed position, the central axis of the third magnet being offset from and parallel to the central axis of the first magnet when the latch mechanism is in the closed position; and
a fourth magnet positioned at the second end portion of the mover, the fourth magnet having an outer surface and a central axis, the outer surface of the fourth magnet positioned at the outer surface of the second magnet when the latch mechanism is in the closed position, the central axis of the fourth magnet being offset from and parallel to the central axis of the second magnet when the latch mechanism is in the closed position.

2. The latch mechanism of claim 1 , wherein a surface area of the outer surface of the first magnet and a surface area of the outer surface of the second magnet are about equal.

3. The latch mechanism of claim 2 , wherein a surface area of the outer surface of the third magnet and a surface area of the outer surface of the fourth magnet are about equal.

4. The latch mechanism of claim 3 , wherein the surface area of the outer surface of the first magnet, the surface area of the outer surface of the second magnet, the surface area of the outer surface of the third magnet and the surface area of the outer surface of the fourth magnet are about equal.

5. The latch mechanism of claim 1 , wherein the stator includes a first elongated portion and a second elongated portion, the first and second elongated portions of the stator defining an angle α therebetween, the angle α being between about fifty degrees and about seventy degrees.

6. The latch mechanism of claim 5 , wherein the mover includes a first elongated portion and a second elongated portion, the first and second elongated portions of the mover defining an angle β therebetween, the angle β being between about fifty degrees and about seventy degrees.

7. The latch mechanism of claim 1 , further comprising a stator holder that defines a recess and a mover holder, the stator mounted to the stator holder, the mover mounted to the mover holder, the mover holder received within the recess of the stator holder when the latch mechanism is in the closed position.

8. The latch mechanism of claim 7 , wherein the stator and the mover are constructed with steel and the stator holder and mover holder are constructed with plastic.

9. The latch mechanism of claim 1 , wherein the central axis of the first magnet and the central axis of the second magnet define an angle γ therebetween, the angle γ being between about one hundred and ten degrees and about one hundred and thirty degrees.

10. The latch mechanism of claim 1 , wherein the central axis of the third magnet and the central axis of the fourth magnet define an angle δ therebetween, the angle δ being between about one hundred and ten degrees and about one hundred and thirty degrees.

11. A latch assembly, the latch assembly defining a lateral direction and a transverse direction, the lateral and transverse directions being perpendicular to each other, the latch assembly comprising:
a stator having a first end portion and a second end portion, the first and second end portions of the stator being spaced apart from each other along the lateral direction;
a first magnet mounted to the stator at the first end portion of the stator, the first magnet having an outer surface;
a second magnet mounted to the stator at the second end portion of the stator, the second magnet having an outer surface;
a mover having a first end portion and a second end portion, the first and second end portions of the mover being spaced apart from each other along the lateral direction;
a third magnet mounted to the mover at the first end portion of the mover, the third magnet having an outer surface, the outer surface of the third magnet facing and offset from the outer surface of the first magnet when the latch assembly is in a closed position, the outer surface of the third magnet overlapping the outer surface of the first magnet when the latch assembly is in the closed position; and
a fourth magnet positioned at the second end portion of the mover, the fourth magnet having an outer surface, the outer surface of the fourth magnet facing and offset from the outer surface of the second magnet when the latch assembly is in the closed position, the outer surface of the fourth magnet overlapping the outer surface of the second magnet when the latch assembly is in the closed position.

12. The latch assembly of claim 11 , wherein a surface area of the outer surface of the first magnet and a surface area of the outer surface of the second magnet are about equal.

13. The latch assembly of claim 12 , wherein a surface area of the outer surface of the third magnet and a surface area of the outer surface of the fourth magnet are about equal.

14. The latch assembly of claim 13 , wherein the surface area of the outer surface of the first magnet, the surface area of the outer surface of the second magnet, the surface area of the outer surface of the third magnet and the surface area of the outer surface of the fourth magnet are about equal.

15. The latch assembly of claim 11 , wherein a normal line of the outer surface of the first magnet and a normal line of the outer surface of the second magnet define an angle γ therebetween, the angle γ being between about one hundred and ten degrees and about one hundred and thirty degrees.

16. The latch assembly of claim 11 , wherein a normal line of the outer surface of the third magnet and a normal line of the outer surface of the fourth magnet define an angle δ therebetween, the angle δ being between about one hundred and ten degrees and about one hundred and thirty degrees.

Assignees

• Gen Electric

Inventors

• Tarr Ronald Scott
• Mallampalli Srinivas

Classifications

• Y10T292/11

  Magnetic · CPC title

• E05C19/16 Primary

  Devices holding the wing by magnetic or electromagnetic attraction {(E05C17/56 takes precedence)} · CPC title

• D06F58/20

  General details of domestic laundry dryers  (D06F59/00 takes precedence) · CPC title

• D06F58/04

  Details  (controlling or regulating devices D06F34/00) · CPC title

• A47L15/4259

  Arrangements of locking or security/safety devices for doors, e.g. door latches, switch to stop operation when door is open · CPC title