CA2611764A1 - An electronic stylus with a force re-directing coupling - Google Patents

An electronic stylus with a force re-directing coupling Download PDF

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Publication number
CA2611764A1
CA2611764A1 CA002611764A CA2611764A CA2611764A1 CA 2611764 A1 CA2611764 A1 CA 2611764A1 CA 002611764 A CA002611764 A CA 002611764A CA 2611764 A CA2611764 A CA 2611764A CA 2611764 A1 CA2611764 A1 CA 2611764A1
Authority
CA
Canada
Prior art keywords
force
sensor assembly
bearing member
load bearing
assembly according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002611764A
Other languages
French (fr)
Other versions
CA2611764C (en
Inventor
Paul Lapstun
Kia Silverbrook
Matthew John Underwood
Tobin Allen King
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Silverbrook Research Pty Ltd
Original Assignee
Silverbrook Research Pty Ltd
Paul Lapstun
Kia Silverbrook
Matthew John Underwood
Tobin Allen King
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2005904511A external-priority patent/AU2005904511A0/en
Application filed by Silverbrook Research Pty Ltd, Paul Lapstun, Kia Silverbrook, Matthew John Underwood, Tobin Allen King filed Critical Silverbrook Research Pty Ltd
Publication of CA2611764A1 publication Critical patent/CA2611764A1/en
Application granted granted Critical
Publication of CA2611764C publication Critical patent/CA2611764C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/16Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force
    • G01L5/161Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using variations in ohmic resistance
    • G01L5/162Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using variations in ohmic resistance of piezoresistors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K23/00Holders or connectors for writing implements; Means for protecting the writing-points
    • B43K23/08Protecting means, e.g. caps
    • B43K23/12Protecting means, e.g. caps for pens
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K23/00Holders or connectors for writing implements; Means for protecting the writing-points
    • B43K23/08Protecting means, e.g. caps
    • B43K23/12Protecting means, e.g. caps for pens
    • B43K23/126Protecting means, e.g. caps for pens with clips
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K25/00Attaching writing implements to wearing apparel or objects involving constructional changes of the implements
    • B43K25/02Clips
    • B43K25/022Clips attached to a pen cap
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K29/00Combinations of writing implements with other articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K29/00Combinations of writing implements with other articles
    • B43K29/003Combinations of writing implements with other articles with optical equipment, e.g. magnifier, viewer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K29/00Combinations of writing implements with other articles
    • B43K29/004Combinations of writing implements with other articles with more than one object
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K29/00Combinations of writing implements with other articles
    • B43K29/08Combinations of writing implements with other articles with measuring, computing or indicating devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K29/00Combinations of writing implements with other articles
    • B43K29/08Combinations of writing implements with other articles with measuring, computing or indicating devices
    • B43K29/093Combinations of writing implements with other articles with measuring, computing or indicating devices with calculators
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K29/00Combinations of writing implements with other articles
    • B43K29/10Combinations of writing implements with other articles with illuminating devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K7/00Ball-point pens
    • B43K7/005Pen barrels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K7/00Ball-point pens
    • B43K7/02Ink reservoirs; Ink cartridges
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00Measuring force or stress, in general
    • G01L1/26Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/0304Detection arrangements using opto-electronic means
    • G06F3/0317Detection arrangements using opto-electronic means in co-operation with a patterned surface, e.g. absolute position or relative movement detection for an optical mouse or pen positioned with respect to a coded surface
    • G06F3/0321Detection arrangements using opto-electronic means in co-operation with a patterned surface, e.g. absolute position or relative movement detection for an optical mouse or pen positioned with respect to a coded surface by optically sensing the absolute position with respect to a regularly patterned surface forming a passive digitiser, e.g. pen optically detecting position indicative tags printed on a paper sheet
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03545Pens or stylus

Abstract

A force sensor particularly suited for use in an electronic stylus that senses an applied force on its nib for recording pen strokes and handwriting recognition. The sensor has a load bearing member for receiving an input force to be sensed and associated circuitry for converting the input force into an output signal indicative of the input force. A coupling at least partially transmits the applied force to be the input force acting on the load bearing member. The force transfer coupling transferring the forces so that the applied force and the input force are not co-linear.

Claims (20)

1. A force sensor assembly comprising:
a load bearing member for receiving an input force;
a sensor circuit for converting the input force into a signal indicative of the input force; and, a force transfer coupling for receiving an applied force and at least partially transferring it to the load bearing member as the input force; wherein, the applied force and the input force are not co-linear.
2. A force sensor assembly according to claim 1 wherein the force transfer coupling is an element configured for elastic deformation in a direction skew to the applied force.
3. A force sensor assembly according to claim 2 wherein the element is a double bowed section that bows outwardly when axially compressed by the applied force.
4. A force sensor assembly according to claim 3 wherein the load bearing member engages one of the bowed sections at its mid point such that the input force is perpendicular to the applied force.
5. A force sensor assembly according to claim 4 wherein the bowed section that does not contact the load bearing member is constrained against lateral displacement in order to stiffen the other bowed section.
6. A force sensor assembly according to claim 5 wherein the bowed sections have an arcuate lateral cross section to reduce contact friction with the load bearing member and the lateral constraint.
7. A force sensor assembly according to claim 3 wherein the load bearing member a rounded protrusion for contacting the bowed section of the force transfer coupling.
8. A force sensor assembly according to claim 1 wherein the force transfer coupling is a hydraulic element that uses the applied force to create hydraulic pressure acting on the load bearing member.
9. A force sensor assembly according to claim 8 wherein the hydraulic pressure acts such that the input force is perpendicular to the applied force.
10. A force sensor assembly according to claim 9 wherein the hydraulic fluid has low viscosity and low shear forces.
11. A force sensor assembly according to claim 10 wherein the hydraulic fluid is silicon gel.
12. A force sensor assembly according to claim 11 wherein the hydraulic fluid is contained in a reservoir at least partially defined by a flexible membrane such that the applied force acts on the hydraulic fluid via the flexible membrane.
13. A force sensor assembly according to claim 12 wherein the hydraulic fluid acts directly on the load bearing member.
14. A force sensor assembly according to claim 1 wherein the circuitry is a piezoresistive bridge circuit.
15. An electronic stylus comprising:
an elongate body;
a nib extending from one end of the elongate body;
a load bearing member for receiving an input force;
a sensor circuit for converting the input force into a signal indicative of the input force; and, a force transfer coupling for receiving an applied force caused by contact on the nib, and at least partially transferring it to the load bearing member as the input force;
wherein during use, the applied force and the input force are not co-linear.
16. An electronic stylus according to claim 15 wherein the nib of the electronic stylus is a ball point writing nib with a tubular ink cartridge extending from the nib toward the load bearing member such that the end of the cartridge opposite the nib transmits the applied force to the hydraulic coupling.
17. An electronic stylus according to claim 15 wherein the output signal from the circuitry support a hand writing recognition facility.
18. An electronic stylus according to claim 15 wherein the circuitry is an integrated circuit (IC) mounted on a PCB (printed circuit board), the plane of the PCB being parallel to the longitudinal axis of the elongate body.
19. An electronic stylus according to claim 15 wherein the load bearing member can move up to 100 microns relative to the elongate body.
20. An electronic stylus according to claim 15 wherein the output signal from the circuitry support a hand writing recognition facility.
CA2611764A 2005-08-19 2006-07-31 An electronic stylus with a force re-directing coupling Expired - Fee Related CA2611764C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU2005904511 2005-08-19
AU2005904511A AU2005904511A0 (en) 2005-08-19 Methods, systems and apparatus (NPS112PAU)
PCT/AU2006/001066 WO2007019600A1 (en) 2005-08-19 2006-07-31 An electronic stylus with a force re-directing coupling

Publications (2)

Publication Number Publication Date
CA2611764A1 true CA2611764A1 (en) 2007-02-22
CA2611764C CA2611764C (en) 2011-12-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2611764A Expired - Fee Related CA2611764C (en) 2005-08-19 2006-07-31 An electronic stylus with a force re-directing coupling

Country Status (4)

Country Link
US (7) US7523672B2 (en)
EP (1) EP1915600A4 (en)
CA (1) CA2611764C (en)
WO (1) WO2007019600A1 (en)

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