Molded article of pen tip of input pen for coordinate input apparatus, method of molding pen tip and mold therefor
First Claim
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1. A mold for molding a pen tip of an input pen for inputting a mechanical vibration to a coordinate input apparatus, the apparatus detecting coordinates indicated by the input pen by detecting propagation of the mechanical vibration on a mechanical vibration transmitting plate, said mold comprising:
- a mold member having a shape for forming, by molding, a configuration of the pen tip for transmitting the mechanical vibration to the mechanical vibration transmitting plate; and
a gate formed in said mold member, for injecting resin into said mold, said gate being disposed on an axis of said mold member corresponding to a center axis of the pen tip, wherein a mechanical characteristic of the vibration of the pen tip is symmetry with respect to the center axis of the pen tip.
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Abstract
A molded article of a pen tip of an input pen for a coordinate input apparatus for inputting oscillation to an oscillation transmitting plate, detecting oscillation propagating through the oscillation transmitting plate and detecting indicated coordinates is molded by injecting a composition containing at least liquid crystalline resin into a mold member for molding the configuration of the pen tip. In a mold for the pen tip, at least one gate is formed in a molding member such that the gate is disposed at a position symmetric with respect to the center axis of the pen tip.
22 Citations
13 Claims
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1. A mold for molding a pen tip of an input pen for inputting a mechanical vibration to a coordinate input apparatus, the apparatus detecting coordinates indicated by the input pen by detecting propagation of the mechanical vibration on a mechanical vibration transmitting plate, said mold comprising:
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a mold member having a shape for forming, by molding, a configuration of the pen tip for transmitting the mechanical vibration to the mechanical vibration transmitting plate; and
a gate formed in said mold member, for injecting resin into said mold, said gate being disposed on an axis of said mold member corresponding to a center axis of the pen tip, wherein a mechanical characteristic of the vibration of the pen tip is symmetry with respect to the center axis of the pen tip. - View Dependent Claims (2, 3)
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4. A mold for molding a pen tip of an input pen for inputting a mechanical vibration to a coordinate input apparatus, the apparatus detecting coordinates indicated by the input pen by detecting propagation of the mechanical vibration on a mechanical vibration transmitting plate, said mold comprising:
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a mold member having a shape for forming, by molding, a configuration of the pen tip, for transmitting the mechanical vibration to the mechanical vibration transmitting plate; and
a plurality of gates formed in said mold member, for injecting resin into said mold, said gates being disposed at positions at even intervals in a circumferential direction about an axis of said mold member corresponding to a center axis of the pen tip, wherein a mechanical characteristic of the vibration of the pen tip is symmetry with respect to the center axis of the pen tip.
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5. A method of molding a pen tip of an input pen for inputting a mechanical vibration to a coordinate input apparatus, the apparatus detecting coordinates indicated by the input pen by detecting propagation of the mechanical vibration on a mechanical vibration transmitting plate, said method comprising the steps of:
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providing a mold member for forming, by molding, a configuration of the pen tip for transmitting the mechanical vibration to the mechanical vibration transmitting plate, with a gate disposed on an axis of the mold member corresponding to a center axis of the pen tip;
injecting resin into the gate; and
effecting a working treatment of a molded body formed in said injecting step by the mold member into the pen tip, wherein a mechanical characteristic of the vibration of the pen tip is symmetry with respect to the center axis of the pen tip.
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6. A method of molding a pen tip of an input pen for inputting a mechanical vibration to a coordinate input apparatus, the apparatus detecting coordinates indicated by the input pen by detecting propagation of the mechanical vibration on a mechanical vibration transmitting plate, said method comprising the steps of:
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providing a mold member for forming, by molding, a configuration of the pen tip, for transmitting the mechanical vibration to the mechanical vibration transmitting plate, with a plurality of gates formed in the mold member at positions at even intervals in a circumferential direction about an axis of the mold member corresponding to a center axis of the pen tip;
injecting resin into the gates; and
effecting a working treatment of a molded body formed in said injecting step by the mold member into the pen tip, wherein a mechanical characteristic of the vibration of the pen tip is symmetry with respect to the center axis of the pen tip. - View Dependent Claims (7)
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8. A molded pen tip article for a mechanical vibration input pen for a coordinate input apparatus, the apparatus calculating and outputting a coordinate position on a mechanical vibration transmitting plate indicated by the mechanical vibration input pen based on a delay time until elastic wave mechanical vibration input on the mechanical vibration transmitting plate by the mechanical vibration input pen arrives at mechanical vibration detection means, said molded pen tip article transmitting a mechanical vibration generated by a mechanical vibration generation device provided within the mechanical vibration input pen, said molded pen tip article comprising:
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a composition including liquid crystalline resin containing a filler, wherein the composition is injected into a mold member for forming, by molding, a configuration of said pen tip article which transmits the mechanical vibration to a point on the mechanical vibration transmitting plate and which has a symmetric configuration with respect to a center axis of said pen tip article, wherein a mechanical characteristic of the vibration of said pen tip article is symmetry with respect to the center axis of said pen tip article. - View Dependent Claims (9, 10)
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11. A coordinate input apparatus for detecting mechanical vibration propagating through a mechanical vibration transmitting plate and for detecting indicated coordinates, said apparatus comprising:
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an input pen comprising an injection molded pen tip of a composition comprising liquid crystalline resin containing a filler, the pen tip transmitting the mechanical vibration to the mechanical vibration propagation plate and further having a symmetric configuration with respect to a center axis of the pen tip; and
generating means disposed in said input pen for generating mechanical vibration, wherein a mechanical characteristic of the vibration of the pen tip is symmetry with respect to the center axis of the pen tip. - View Dependent Claims (12, 13)
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Specification
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Current AssigneeCanon Kabushiki Kaisha (Canon Inc.)
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Original AssigneeCanon Kabushiki Kaisha (Canon Inc.)
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InventorsTanaka, Atsushi, Sato, Hajime, Kobayashi, Katsuyuki, Yoshimura, Yuichiro, Yanagisawa, Ryozo
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Primary Examiner(s)Saras, Steven
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Assistant Examiner(s)ENGLISH, ALECIA DIANE
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Application NumberUS09/105,995Publication NumberTime in Patent Office1,779 DaysField of Search345/179, 345/169, 345/173, 264/145, 738/62, 528/272US Class Current345/179CPC Class CodesB29C 2045/0027 Gate or gate mark locationsB29C 45/0001 characterised by the choice...B29C 45/0013 using fillers dispersed in ...B29C 45/0025 Preventing defects on the m...B29C 45/0055 ShapingB29K 2105/0079 Liquid crystalsG06F 3/03545 Pens or stylusG06F 3/0433 in which the acoustic waves...
