Magnetically actuated restraining mechanisms

Patent metadata

Field	Value
Publication number	US-9997286-B2
Application number	US-201615141696-A
Country	US
Kind code	B2
Filing date	Apr 28, 2016
Priority date	Sep 28, 2015
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

Some embodiments can include a retention mechanism having a first component including a first clasping surface and a first magnet having a first polarity as well as a second component having a second clasping surface configured to be alignable to and to coordinate with the first clasping surface. The second component can have a magnetic assembly having an effective polarity that varies in accordance with a electric current pulse received at the magnetic assembly, where a magnetic circuit is formed between the first magnet and the magnetic assembly, and where when the effective polarity of the magnetic assembly is the first polarity, the magnetic circuit is repulsive causing the first and second clasping surfaces to separate otherwise, the magnetic circuit is attractive causing the clasping surfaces to come together.

First claim

What is claimed is:

1. An electronic device comprising:
a first component comprising:
a retention portion that includes a first magnet having a first polarity, and a second magnet having a second polarity opposite the first polarity; and

a second component comprising:
a restraining component configured to be alignable to and to coordinate with the retention portion, the restraining component including:
a third magnet having a third polarity and located at a first position, and
a magnetic assembly having an effective polarity that varies in accordance with an electric current pulse received at the magnetic assembly,

wherein a magnetic circuit is formed between the third magnet and the magnetic assembly, and
wherein when the effective polarity of the magnetic assembly is switched to the third polarity of the third magnet, the magnetic circuit is repulsive causing the third magnet to actuate to a second position causing the retention portion to separate from the restraining component, otherwise, the magnetic circuit is attractive maintaining the third magnet in the first position causing the retention portion and the restraining component to come together.

2. The electronic device of claim 1 , wherein the magnetic assembly is an electro-permanent magnet.

3. The electronic device of claim 1 , wherein the first polarity is the same as the third polarity.

4. The electronic device of claim 1 , wherein the second polarity is the same as the third polarity.

5. The electronic device of claim 1 , wherein the first component is a laptop lid and the second component is a laptop base.

6. The electronic device of claim 5 , wherein the third magnet moves laterally between the first position and the second position within the laptop base.

7. A portable electronic assembly, comprising:
an electronic device including a base portion;
a lid configured to be retained to the base portion of the electronic device;
a retention portion comprising a first magnet having a first polarity; and
a restraining component comprising a magnetic assembly having a variable effective polarity and a base magnet having a second polarity that magnetically interacts with the first magnet of the retention portion;
wherein the effective polarity of the magnetic assembly selectively switches in response to receiving an electric current pulse; and
wherein switching the effective polarity of the magnetic assembly alters the magnetic interaction between the retention portion and the restraining component via the first magnet and the base magnet, which moves the lid either:
(i) from a locked state to an unlocked state with respect to the base portion; or
(ii) from the unlocked state to the locked state with respect to the base portion.

8. The portable electronic assembly of claim 7 , wherein the magnetic assembly is an electro-permanent magnet.

9. The portable electronic assembly of claim 7 , wherein the retention portion and the restraining component are configured to mechanically lock with each other.

10. The portable electronic assembly of claim 7 , wherein the retention portion is arranged in the lid and the restraining component is arranged in the base portion of the electronic device.

11. The portable electronic assembly of claim 10 , wherein when the effective polarity of the magnetic assembly is selectively switched to match the second polarity of the base magnet, the magnetic interaction between the retention portion and the restraining component is repulsive causing the retention portion and the restraining component to repel each other otherwise, the magnetic interaction between the retention portion and the restraining component is attractive causing the retention portion and the restraining component to attract each together.

12. The portable electronic assembly of claim 7 , wherein the lid is rotatably attached by a hinge to an end of the base portion of the electronic device.

13. The portable electronic assembly of claim 7 , wherein the first magnet is embedded in the lid and the base magnet is embedded in the base portion.

Assignees

• Apple Inc

Inventors

• Herman David S

Classifications

• H01F7/0205 Primary

  Magnetic circuits with PM in general · CPC title

• H01F7/20

  without armatures (cores H01F3/00; coils H01F5/00 {; shaping metal by applying magnetic forces B21D26/14; electromagnets specially adapted for NMR applications G01R33/381}) · CPC title

• H01F7/0252 Primary

  PM holding devices (H01F7/021, H01F7/0215, H01F7/0226 take precedence) · CPC title