# US 11,026,485 B2 · Wrist-worn device clasp

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- Number: US 11,026,485 B2
- Document ID: US11026485B2
- Status: Granted
- Kind: B2
- Application number: 16/037,806
- Filed: 2018-07-17
- Published: 2018-11-08
- Granted: 2021-06-08
- Earliest claimed: 2013-08-19
- Assignees: ARM IP Limited
- Applicants: ARM IP Limited
- Inventors: Steven James Ogborne; Hugo John Martin Vincent; Gabor Balint
- Web page: https://patentgrep.com/patent/US11026485B2

## CPC

- A44C 5/14: characterised by the way of fastening to a wrist-watch or the like
- A44C 5/2066: {Fasteners with locking means acting parallel to the main plane of the fastener and perpendicularly to the direction of the fastening}
- G01D 5/142: {using Hall-effect devices (measuring magnetic variables using Hall-effect or other galvanomagnetic devices G01R33/06)}
- G04B 37/1486: {Arrangements for fixing to a bracelet (building watches into bracelets (montre marquise) G04B37/12; arrangements for hanging pocket- or other watches on chains G04B37/1446)}
- G06F 21/34: involving the use of external additional devices, e.g. dongles or smart cards
- G06F 21/88: Detecting or preventing theft or loss
- G07C 9/00: Individual registration on entry or exit
- H01F 7/0263: {Closures, bags, bands, engagement devices with male and female parts}
- A44D 2203/00: Fastening by use of magnets
- A44C: PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G04B: MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS (spring- or weight-driven mechanisms in general F03G; electromechanical clocks or watches G04C; electromechanical clocks with attached or built-in means operating any device at pre-selected times or after predetermined time intervals G04C23/00; clocks or watches with stop devices G04F7/08)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G07C: TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- A44D: INDEXING SCHEME RELATING TO BUTTONS, PINS, BUCKLES OR SLIDE FASTENERS, AND TO JEWELLERY, BRACELETS OR OTHER PERSONAL ADORNMENTS

## Abstract

A wrist-worn device clasp that secures a strap of the wrist-worn device. A first mechanical part of the wrist worn device interlocks with a second mechanical part by motion in a first plane in order to resist motion perpendicular to said first plane. The first mechanical part also inhibits a first securing part and a second securing part being separated by tension along the strap substantially perpendicular to the first plane when the first mechanical part and second mechanical part are engaged with each other. The first securing part and the second securing part inhibit separation of the first mechanical part and the second mechanical part by motion parallel to the first plane when they are engaged with each other by motion perpendicular to the first plane.

## Claims

### Claim 1

A wrist-worn device clasp having a first side and a second side, configured to secure a strap, the wrist-worn device clasp comprising:
a mechanical interlocking mechanism comprising a first mechanical part on said first side and a second mechanical part on said second side, said first mechanical part being configured to interlock with said second mechanical part by motion in a first plane to resist motion perpendicular to said first plane and inhibit a first securing part and a second securing part being separated by tension along said strap substantially perpendicular to said first plane when said first mechanical part and second mechanical part are engaged with each other; and
a securing mechanism comprising said first securing part on said first side and said second securing part on said second side, wherein said first securing part comprises a first magnet located within a first central region of said first mechanical part, wherein said first central region is substantially parallel to said first plane and wherein said second securing part comprises a second magnet located within a second central region of said second mechanical part, wherein said second central region is substantially parallel to said first plane, and
wherein said first magnet and said second magnet are configured, when magnetically engaged with each other by motion perpendicular to said first plane, to inhibit separation of said first mechanical part and said second mechanical part by motion parallel to said first plane.

### Claim 2 (depends on 1)

A wrist-worn device clasp according to claim 1,
wherein said securing mechanism is additionally configured to inhibit separation of said first securing part and said second securing part.

### Claim 3 (depends on 1)

A wrist-worn device clasp according to claim 1, further comprising
a cover disposed over said securing mechanism and configured to protect said securing mechanism from exposure.

### Claim 4 (depends on 1)

A wrist-worn device clasp according to claim 1,
wherein one of said first mechanical part and second mechanical part is an inner mechanical part and the other one of said first mechanical part and second mechanical part is an outer mechanical part;
wherein said outer mechanical part comprises at least one channel for receiving at least a part of said inner mechanical part at an entrance point.

### Claim 5 (depends on 4)

A wrist-worn device clasp according to claim 4,
wherein said entrance point is larger than said inner mechanical part; and
wherein a part of said at least one channel decreases in size away in a direction away from said entrance point towards a second point.

### Claim 6 (depends on 5)

A wrist-worn device clasp according to claim 5,
wherein said second point is substantially the same size as said inner mechanical part.

### Claim 7 (depends on 5)

A wrist-worn device clasp according claim 5,
wherein said part of said at least one channel continuously decreases in size in a direction away from said entrance point towards said second point.

### Claim 8 (depends on 4)

A wrist-worn device clasp according to claim 4,
wherein said at least one channel is splayed; and
wherein said first mechanical part and said second mechanical part are configured to be disengaged by a rotation in said first plane.

### Claim 9 (depends on 1)

A wrist-worn device clasp according to claim 1,
wherein at least a part of said clasp is made from anodised aluminium.

### Claim 10 (depends on 1)

A wrist-worn device clasp according to claim 1,
wherein said first side is a part of a face of a watch.

### Claim 11 (depends on 1)

A wrist-worn device clasp according to claim 1,
wherein said first side is a part of said strap.

### Claim 12

A method of securing a strap of a wrist-worn device by use of a clasp having a first side and a second side, the method comprising the steps:
a mechanical interlocking step of moving a first mechanical part on said first side relative to a second mechanical part on said second side in a first plane in order to interlock said first mechanical part and said second mechanical part and thereby resist motion perpendicular to a first plane and inhibit a first securing part and a second securing part being separated by tension along said strap substantially perpendicular to said first plane when said first mechanical part and second mechanical part are engaged with each other, wherein said first securing part comprises a first magnet located within a first central region of said first mechanical part, wherein said first central region is substantially parallel to said first plane and wherein said second securing part comprises a second magnet located within a second central region of said second mechanical part, wherein said second central region is substantially parallel to said first plane; and
a securing step of moving said first securing part on said first side relative to said second securing part on said second side in a plane perpendicular to said first plane, in order to magnetically engage said first magnet and said second magnet, to inhibit separation of said first mechanical part and said second mechanical part by motion parallel to said first plane.