WO2002093351A1 - Writing instrument for writing discriminating system - Google Patents
Writing instrument for writing discriminating system Download PDFInfo
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- WO2002093351A1 WO2002093351A1 PCT/JP2002/004751 JP0204751W WO02093351A1 WO 2002093351 A1 WO2002093351 A1 WO 2002093351A1 JP 0204751 W JP0204751 W JP 0204751W WO 02093351 A1 WO02093351 A1 WO 02093351A1
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- WIPO (PCT)
- Prior art keywords
- writing
- core
- piezoelectric vibrator
- brush
- electrode
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input 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
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/043—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
- G06F3/0433—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves in which the acoustic waves are either generated by a movable member and propagated within a surface layer or propagated within a surface layer and captured by a movable member
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K8/00—Pens with writing-points other than nibs or balls
- B43K8/22—Pens with writing-points other than nibs or balls with electrically or magnetically activated writing-points
Definitions
- the present invention relates to a writing instrument for a writing discrimination system applicable to signature authentication and the like, and in particular, utilizes a vibrator provided in the writing core and utilizing the fact that the vibration of the writing core during writing is unique to the writer.
- Writing implement for performing writing discrimination Background art
- FIG. 9 shows an example in which the writing implement 70 is configured as a ballpoint pen.
- a cylindrical piezoelectric vibrator 74 is mounted on the rod-shaped brush lead 72 such that the brush lead 72 is inserted into a through hole of the piezoelectric vibrator 74.
- the piezoelectric vibrator 74 is fixed to the brush lead 72 by an adhesive uniformly and thinly applied to the inner surface of the through hole.
- the brush lead 72 is fixed to the outer cylinder 78 via an annular support fixture 76. With such a configuration, the piezoelectric vibrator 74 vibrates the brush lead 72 in the longitudinal direction by a voltage applied from the outside.
- the piezoelectric vibrator 74 is vibrated by a self-excited oscillation circuit (not shown), and the vibration of the piezoelectric vibrator 74 can be detected based on a signal of the self-excited oscillation circuit.
- the pattern of vibration change of the writing lead 72 during writing depends on the writer. It turns out to be different. This is because the contact state (for example, pressing force, contact angle, etc.) between the writing core 72 and the writing medium (not shown) during writing and its change (for example, pen speed) have characteristics unique to the writer. It is thought to be. Therefore, Writing detection can be performed by detecting the vibration of the brush core 72 during excitation and comparing this with a unique vibration pattern registered in advance.
- the piezoelectric vibrator was fixed to the pen core with an adhesive applied to the inner surface of the through hole.
- the mounting state of the piezoelectric vibrator for each writing instrument that is, the longitudinal direction of the brush core or Individual differences in the mounting position in the radial direction, or the mounting posture relative to the brush core, occurred, and this was the cause of the variation in the vibration characteristics (ie, resonance frequency, vibration mode, etc.) of each writing instrument. Disclosure of the invention
- a pair of a pen tip supported by a writing instrument main body and a vibrator provided on an outer peripheral surface of the pen tip so as to face each other with a center axis of the pen tip being interposed therebetween. are provided. According to such a configuration, the bonding surface of the vibrator with the brush core is exposed to the outside. For example, when these are bonded and fixed, a more uniform adhesive layer can be formed. Variations in the state of attachment of the vibrator to the brush lead can be suppressed as compared with the related art.
- FIG. 1 is a perspective view (partially sectional view) of a writing instrument for a writing discrimination system according to an embodiment of the present invention
- FIG. 2 is a perspective view showing a piezoelectric vibrator of a writing instrument for a writing discrimination system according to the first embodiment of the present invention
- FIG. 3 is an equivalent circuit diagram of a piezoelectric vibrator of a writing instrument for a writing discrimination system according to the first embodiment of the present invention
- FIG. 4 is a circuit diagram of a self-excited oscillation circuit incorporating a piezoelectric vibrator of a writing instrument for a writing discrimination system according to the first embodiment of the present invention
- FIG. 5 shows a piezoelectric vibrator of a writing instrument for a writing discrimination system according to the second embodiment of the present invention.
- Perspective view showing a moving element
- FIG. 6 is a perspective view showing a piezoelectric vibrator of a writing instrument for a writing discrimination system according to a third embodiment of the present invention.
- FIG. 7 is an equivalent circuit diagram of a piezoelectric vibrator of a writing instrument for a writing discrimination system according to the third embodiment of the present invention.
- FIG. 8 is a circuit diagram of a self-excited oscillation circuit incorporating a piezoelectric vibrator of a writing instrument for a writing discrimination system according to a third embodiment of the present invention
- FIG. 9 is a perspective view (partially sectional view) of a conventional writing instrument for a writing discrimination system.
- FIG. 1 is a schematic configuration diagram of a writing implement 10 according to the present embodiment
- FIG. 2 is a perspective view of a piezoelectric vibrator 20 used in the writing implement 10
- FIG. 3 is an equivalent circuit diagram of the piezoelectric vibrator 20
- FIG. 4 is a circuit diagram of a self-excited oscillation circuit 30 that performs excitation and vibration detection of a brush lead.
- the writing implement 10 is configured as a ballpoint pen.
- a rod-shaped brush lead 12 that is, an ink shaft
- the brush core 12 has one or more (one in the present embodiment) pairs of flat portions 12 at positions facing the center axis C of the brush core 12 on the outer peripheral surface thereof.
- a p-shaped piezoelectric vibrator 20 (20a, 20b) is fixed to the flat portion 12p by, for example, an adhesive. This piezoelectric vibrator 20 is incorporated in a self-excited oscillation circuit 30 (FIG. 4; described later), and vibrates the brush lead 12.
- the piezoelectric vibrator 20 is provided so that the center thereof is located at a distance of 1/4 of the length of the brush lead 12 in the longitudinal direction from the end 12 a on the non-contact side of the brush lead 12. Further, the support fixture 14 is provided at a position spaced apart by 1/4 of the length of the brush lead 12 in the longitudinal direction from the end 12b on the contact side of the brush lead 12. When the piezoelectric vibrator 20 vibrates, the brush lead 12 vibrates most strongly in a standing wave vibration mode in which the length of the brush lead 12 is one wavelength.
- These installation positions that is, positions separated from the longitudinal ends (12a, 12b) of the brush core 12 in the longitudinal direction by 1/4 of the length of the brush core 12, respectively) are In the section is there.
- both ends (12a, 12b) in the longitudinal direction and the center position in the longitudinal direction of the brush lead 12 are antinodes of vibration.
- the piezoelectric vibrator 20 includes a ceramic substrate 22 configured as a strip-shaped thin plate (a rectangular parallelepiped), and a pair of ceramic substrates 22 formed on the entire front and back surfaces of the ceramic substrate 22, respectively. (Positive electrode 24a, negative electrode 24b). A lead wire 26 is connected to the electrode (positive electrode) 24 a on the front side.
- the piezoelectric vibrator 20 can be manufactured more easily and with higher precision by making the piezoelectric vibrator 20 a flat plate.
- a DC voltage is applied to a pair of electrodes (24a, 24b) of the piezoelectric vibrator 20 under predetermined conditions, and the piezoelectric vibrator 20 is polarized.
- the piezoelectric vibrator 20 is polarized in a direction perpendicular to the front surface and the back surface, and the polarization direction is from the front surface to the back surface or from the back surface to the front surface.
- the piezoelectric vibrator 20 having been subjected to the above polarization treatment has an inductance component L, a capacitance component C, and a resistance component between the positive electrode 24a and the negative electrode 24b. This is equivalent to a circuit having R in series and further having a braking capacity component C d in parallel with them.
- the paired piezoelectric vibrators 20 are desirably provided on the outer peripheral wall of the brush lead 12 so as to vibrate while deforming in a shape symmetrical with respect to the central axis C. In this way, the brush lead 12 itself vibrates while deforming into a shape symmetrical with respect to the central axis C. If only one piezoelectric vibrator is provided on the outer peripheral wall of the brush core, the brush core expands and contracts (vibrates) around the position where the piezoelectric vibrator is provided, so that bending vibration or abnormal oscillation is likely to occur.
- each of the plane portions 12 p formed in parallel and forming a pair has a piezoelectric vibrator (20 a, 2 O b).
- Negative electrode (electrode to which negative voltage was applied during polarization) 24 b is joined.
- the polarization directions of the paired piezoelectric vibrators 20 are all directed from the radially inner side to the outer side of the brush lead 12, and they are symmetric with respect to each other with the center axis C of the brush lead 12 interposed therebetween. Become. Further, these pairs of piezoelectric vibrators 20 are provided electrically in parallel. Specifically, as shown in FIG. 4, the electrodes (that is, the negative electrodes) 24 b on the plane portion 12 p side are connected to each other, and the positive electrodes 24 a on the opposite side are connected.
- the piezoelectric vibrator 20 expands and contracts in the polarization direction according to the applied voltage. Piezoelectric vibrators thus provided and connected in parallel
- the pair 20 vibrates while being deformed into a shape symmetrical about the central axis C of the brush lead 12.
- the piezoelectric vibrator 20 expands and contracts in the longitudinal direction according to the Poisson's ratio, the piezoelectric vibrator 20 is long in the longitudinal direction of the brush core 12, so that the brush core 12 mainly has the longitudinal direction. Longitudinal vibration occurs.
- At least a part of the surface of the outer wall 12 w (at least the plane portion 12 p) of the brush core 12 as an ink axis is configured as a conductor (for example, an aluminum alloy or the like), and a pair of piezoelectric vibrations It is in communication with the electrode (here, the negative electrode) 24 b on the brush core 12 of the child 20.
- a conductor for example, an aluminum alloy or the like
- the electrode here, the negative electrode
- the self-excited oscillation circuit 30 includes an amplification circuit 32, a pair of piezoelectric vibrators 20 (20a, 2Ob), and a filter circuit 34.
- the filter circuit 34 has an action of suppressing the influence of unnecessary vibration (spurious) of the piezoelectric vibrator 20.
- the center frequency is substantially equal to the center frequency of the piezoelectric vibrator 20.
- the positive electrode 24 a of the piezoelectric vibrator 20 is connected to the input terminal of the filter circuit 34, and the negative electrode 24 b of the piezoelectric vibrator 20 is an amplifier circuit
- Each output terminal is connected.
- the output terminal of the filter circuit 34 is connected to the conductor (outer wall 12 w) of the brush core 12 described above.
- This conductor is connected to the output terminal of the amplifier circuit 32 and the piezoelectric vibrator 2. It will be interposed between the negative electrode 24 b of 0.
- a change over time in the frequency of the writing lead 12 during writing is detected as a change over time in the frequency of the signal of the self-excited oscillation circuit 30, and the detected data is registered in advance. By comparing with the registered data of the change over time of the frequency for each writer and each written (for example, signature), the written judgment can be performed.
- FIG. 5 is a perspective view of the piezoelectric vibrator 40.
- the piezoelectric vibrator 40 includes a ceramic substrate 42 configured as a strip-shaped thin plate (a rectangular parallelepiped), and a pair of electrodes 4 respectively formed on the front and back surfaces of the ceramic substrate 42. 4 (positive electrode 44a, negative electrode 44b).
- a conductor film 44 c communicating with the electrode 44 b on the back surface is formed on the side surface and the front surface of the ceramic substrate 42.
- the piezoelectric vibrator 40 is closely fixed to the brush lead 12 such that the back surface and the outer peripheral surface of the brush lead 12 are in contact with each other. A voltage can be more easily applied to the electrode (here, the negative electrode 44 b) on the side of the brush core 12 that is not exposed in contact with the brush core 12.
- the positive electrode 44a and the conductor film 44c are insulated by the separation band 44d in which the thin film of the metal conductor is not formed on the surface.
- the area of the positive electrode 44a be larger than the area of the conductive film 44c.
- a lead wire 46a is connected to the positive electrode 44a, and a lead wire 46b is connected to the conductor film 44c.
- the negative electrode 44b is formed on the entire back surface. This piezoelectric vibrator 40 is also subjected to polarization processing in the same manner as in the above embodiment.
- the piezoelectric vibrator 50 is a three-terminal type, and accordingly, the self-excited oscillation circuit 60 has a different configuration from the self-excited oscillation circuit 30 according to the first and second embodiments.
- other configurations are the same as those in the first and second embodiments.
- the piezoelectric vibrator 50 and the self-excited oscillation circuit 60 according to the present embodiment will be described, and detailed description of other configurations will be omitted.
- 6 is a perspective view of the piezoelectric vibrator 50
- FIG. 7 is an equivalent circuit diagram of the piezoelectric vibrator 50
- FIG. 8 is a circuit diagram of the self-excited oscillation circuit 60.
- the piezoelectric vibrator 50 includes a ceramic substrate 52 configured as a strip-shaped thin plate (a rectangular parallelepiped).
- the surface of the ceramic substrate 52 has two electrodes ( A first electrode [drive electrode] 54a and a third electrode [return electrode] 54c) are formed, and one electrode (second electrode [ground electrode] 54b) is formed on the back surface.
- a conductive film 54d that is electrically connected to the back electrode (second electrode 54b) is formed on the side and front surfaces of the ceramic substrate 52.
- the first electrode 54a, the third electrode 54c, and the conductor film 54d are arranged in this order, and the gap between them is insulated by the separators 54e, 54f, respectively. ing.
- the area of the first electrode 54a is preferably larger than the total area of the third electrode 54c and the conductor film 54d for the same reason as in the second embodiment.
- Lead wires (56a, 56b, 56c) are connected to the first, third and conductor films (54a, 54c, 54d), respectively.
- a second electrode 54b is formed on the entire back surface.
- the piezoelectric vibrator 50 having such a configuration is fixed to the brush lead 12 so that the back surface and the outer peripheral surface of the brush lead 12 are in contact with each other, instead of the piezoelectric vibrator 20 of FIG. As shown in FIG.
- the piezoelectric vibrator 50 that has been subjected to the above-described polarization treatment has an inductance component L and a capacitance component C between the first electrode 54a and the third electrode 54c. And a resistance component R in series, a braking capacitance component C d 1 between the first electrode 54 a and the second electrode 54 b, and a second electrode 54 b and a third electrode 54 This is equivalent to a circuit having a braking capacity component C d 2 between the circuit and the circuit c.
- the self-excited oscillation circuit 60 is configured by connecting an amplifier circuit 32, a pair of piezoelectric vibrators 50, and a filter circuit 34 in series in this order. Is done.
- the first electrode 54a is connected to the input terminal of the filter circuit 34
- the third electrode 54c is connected to the output terminal of the amplifier circuit 32
- the second electrode 54b is connected to the ground. It is connected it.
- the writing implement according to the present invention can suppress variations in the mounting state of the vibrator with respect to the brush lead, and can suppress bending vibration or abnormal oscillation due to unbalanced deformation of the brush lead. can do. Therefore, it is suitable for use in a handwriting discrimination system for performing signature authentication.
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Abstract
In a writing instrument having a vibrator in the core, variations in the state of the vibrator mounted on the core among individual are suppressed. A writing instrument (10) comprises a core (12) supported by an outer sleeve (16), and a pair of vibrators (20) disposed on the outer peripheral surface of the core (12) in opposed relation to each other with the center line (C) of the core (12) located therebetween. With such arrangement, since the plane of contact of the vibrators (20) with the core (12) is exposed outward, a more uniform adhesive agent layer can be formed when these are adhesively fixed, and variations in the mounted state of the vibrators (20) among individuals can be suppressed.
Description
明 細 書 筆記判別システム用筆記具 技術分野 Description Writing instrument for writing discrimination system Technical field
本発明は、 署名認証などに適用可能な筆記判別システム用筆記具に関し、 特に、 その筆芯に振動子を備え、 運筆時における筆芯の振動が筆記者固有の特徴を有す ることを利用して筆記判別を行うための筆記具、 に関する。 背景技術 The present invention relates to a writing instrument for a writing discrimination system applicable to signature authentication and the like, and in particular, utilizes a vibrator provided in the writing core and utilizing the fact that the vibration of the writing core during writing is unique to the writer. Writing implement for performing writing discrimination. Background art
出願人は、 振動子によって筆芯を加振した状態で筆記具を運筆したときに筆芯 の振動が筆記者毎に異なることに着目し、 この性質を利用した筆記判別システム について研究開発を行っている。 この筆記判別システムについて、 出願人は、 こ れまでに、 日本国特許出願、 特願 2 0 0 0— 4 2 9 3 6および特願 2 0 0 0 - 5 9 5 2 6を行った。 ここで、 図面を参照して、 この筆記判別システム用の筆記具 の構成および動作について説明する。 The applicant paid attention to the fact that the vibration of the writing lead differs for each writer when the writing implement was operated while the writing lead was vibrated by the vibrator, and conducted research and development on a writing discrimination system using this property. I have. So far, the applicant has filed a Japanese patent application, Japanese Patent Application No. 2000-42893, and Japanese Patent Application No. 2000-59526 with respect to this writing discrimination system. Here, with reference to the drawings, the configuration and operation of a writing instrument for this writing discrimination system will be described.
図 9は、 筆記具 7 0をボールペンとして構成した例を示す。 棒状の筆芯 7 2に は、 円筒状の圧電振動子 7 4が、 圧電振動子 7 4の貫通穴に筆芯 7 2が挿入され る形で装着されている。 圧電振動子 7 4は、 貫通穴の内面に一様に薄く塗布した 接着剤によって筆芯 7 2に固定される。 また筆芯 7 2は、 環状の支持固定具 7 6 を介して外筒 7 8に固定されている。 このような構成により、 圧電振動子 7 4は、 外部より印加される電圧により筆芯 7 2を長手方向に加振する。 圧電振動子 7 4 は、 図示しない自励発振回路によって加振されており、 この自励発振回路の信号 により圧電振動子 7 4の振動を検出することができる。 FIG. 9 shows an example in which the writing implement 70 is configured as a ballpoint pen. A cylindrical piezoelectric vibrator 74 is mounted on the rod-shaped brush lead 72 such that the brush lead 72 is inserted into a through hole of the piezoelectric vibrator 74. The piezoelectric vibrator 74 is fixed to the brush lead 72 by an adhesive uniformly and thinly applied to the inner surface of the through hole. The brush lead 72 is fixed to the outer cylinder 78 via an annular support fixture 76. With such a configuration, the piezoelectric vibrator 74 vibrates the brush lead 72 in the longitudinal direction by a voltage applied from the outside. The piezoelectric vibrator 74 is vibrated by a self-excited oscillation circuit (not shown), and the vibration of the piezoelectric vibrator 74 can be detected based on a signal of the self-excited oscillation circuit.
そしてこれまでの研究により、 このような筆記具 7 0を用いて筆芯 7 2が加振 された状態で筆記を行う場合、 筆記中の筆芯 7 2の振動変化のパターンが筆記者 に応じて異なることが判明している。 これは、 筆記中における筆芯 7 2と筆記媒 体 (図示せず) との接触状態 (例えば押圧力、 接触角度等) およびその変化 (例 えば運筆速度等) が筆記者固有の特徴を有するためと考えられる。 したがって、
加振中の筆芯 7 2の振動を検出してこれを予め登録しておいた固有の振動パ夕一 ンと比較することで筆記判別を行うことができる。 According to previous research, when writing with such a writing implement 70 and the writing lead 72 is vibrated, the pattern of vibration change of the writing lead 72 during writing depends on the writer. It turns out to be different. This is because the contact state (for example, pressing force, contact angle, etc.) between the writing core 72 and the writing medium (not shown) during writing and its change (for example, pen speed) have characteristics unique to the writer. It is thought to be. Therefore, Writing detection can be performed by detecting the vibration of the brush core 72 during excitation and comparing this with a unique vibration pattern registered in advance.
上記筆記具では、 貫通穴内面に塗布した接着剤によって圧電振動子を筆芯に固 定していた。 しかしながら、 このような構成では、 接着剤の層に含まれる気泡な どにより、 均一な接着剤の層を得るのが難しく、 筆記具毎に圧電振動子の装着状 態 (すなわち筆芯の長手方向あるいは径方向の装着位置、 または筆芯に対する相 対的な装着姿勢) の個体差が生じ、 ひいてはこれが筆記具毎の振動特性 (すなわ ち共振周波数、 振動モード等) のばらつきの要因となっていた。 発明の開示 In the above-mentioned writing implement, the piezoelectric vibrator was fixed to the pen core with an adhesive applied to the inner surface of the through hole. However, in such a configuration, it is difficult to obtain a uniform adhesive layer due to bubbles contained in the adhesive layer, and the mounting state of the piezoelectric vibrator for each writing instrument (that is, the longitudinal direction of the brush core or Individual differences in the mounting position in the radial direction, or the mounting posture relative to the brush core, occurred, and this was the cause of the variation in the vibration characteristics (ie, resonance frequency, vibration mode, etc.) of each writing instrument. Disclosure of the invention
本発明にかかる筆記判別システム用筆記具では、 筆記具本体に支持される筆芯 と、 前記筆芯の外周表面上に筆芯の中心軸を挟んで対向するように設けられた振 動子の対と、 を備える。 このような構成によれば、 振動子の筆芯との接合面が外 方に露出するため、 例えばこれらを接着して固定する場合にはより均一な接着剤 層を形成することができる等、 従来に比して筆芯に対する振動子の装着状態のば らっきを抑制することができる。 さらに本発明では、 振動子の対を筆芯の中心軸 を挟んで対向するように設けることで、 筆芯の非対称な変形に伴う屈曲振動ある いは異常発振などが抑制される。 図面の簡単な説明 In a writing instrument for a writing discrimination system according to the present invention, a pair of a pen tip supported by a writing instrument main body and a vibrator provided on an outer peripheral surface of the pen tip so as to face each other with a center axis of the pen tip being interposed therebetween. , Are provided. According to such a configuration, the bonding surface of the vibrator with the brush core is exposed to the outside. For example, when these are bonded and fixed, a more uniform adhesive layer can be formed. Variations in the state of attachment of the vibrator to the brush lead can be suppressed as compared with the related art. Further, in the present invention, by providing a pair of vibrators so as to face each other with the center axis of the brush core interposed therebetween, bending vibration or abnormal oscillation due to asymmetric deformation of the brush core is suppressed. BRIEF DESCRIPTION OF THE FIGURES
図 1は、 本発明の実施形態にかかる筆記判別システム用筆記具の斜視図 (一部 断面図)、 FIG. 1 is a perspective view (partially sectional view) of a writing instrument for a writing discrimination system according to an embodiment of the present invention;
図 2は、 本発明の第一の実施形態にかかる筆記判別システム用筆記具の圧電振 動子を示す斜視図、 FIG. 2 is a perspective view showing a piezoelectric vibrator of a writing instrument for a writing discrimination system according to the first embodiment of the present invention,
図 3は、 本発明の第一の実施形態にかかる筆記判別システム用筆記具の圧電振 動子の等価回路図、 FIG. 3 is an equivalent circuit diagram of a piezoelectric vibrator of a writing instrument for a writing discrimination system according to the first embodiment of the present invention,
図 4は、 本発明の第一の実施形態にかかる筆記判別システム用筆記具の圧電振 動子を組み込んだ自励発振回路の回路図、 FIG. 4 is a circuit diagram of a self-excited oscillation circuit incorporating a piezoelectric vibrator of a writing instrument for a writing discrimination system according to the first embodiment of the present invention,
図 5は、 本発明の第二の実施形態にかかる筆記判別システム用筆記具の圧電振
動子を示す斜視図、 FIG. 5 shows a piezoelectric vibrator of a writing instrument for a writing discrimination system according to the second embodiment of the present invention. Perspective view showing a moving element,
図 6は、 本発明の第三の実施形態にかかる筆記判別システム用筆記具の圧電振 動子を示す斜視図、 FIG. 6 is a perspective view showing a piezoelectric vibrator of a writing instrument for a writing discrimination system according to a third embodiment of the present invention,
図 7は、 本発明の第三の実施形態にかかる筆記判別システム用筆記具の圧電振 動子の等価回路図、 FIG. 7 is an equivalent circuit diagram of a piezoelectric vibrator of a writing instrument for a writing discrimination system according to the third embodiment of the present invention,
図 8は、 本発明の第三の実施形態にかかる筆記判別システム用筆記具の圧電振 動子を組み込んだ自励発振回路の回路図、 FIG. 8 is a circuit diagram of a self-excited oscillation circuit incorporating a piezoelectric vibrator of a writing instrument for a writing discrimination system according to a third embodiment of the present invention,
図 9は、 従来の筆記判別システム用筆記具の斜視図 (一部断面図) である。 発明を実施するための最良の形態 FIG. 9 is a perspective view (partially sectional view) of a conventional writing instrument for a writing discrimination system. BEST MODE FOR CARRYING OUT THE INVENTION
以下、 本発明の第一の実施の形態について図面を参照して説明する。 図 1は、 本実施形態にかかる筆記具 1 0の概略構成図、 図 2は、 筆記具 1 0に用いられる 圧電振動子 2 0の斜視図、 図 3は、 圧電振動子 2 0の等価回路図、 図 4は、 筆芯 の加振および振動検出を行う自励発振回路 3 0の回路図である。 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a writing implement 10 according to the present embodiment, FIG. 2 is a perspective view of a piezoelectric vibrator 20 used in the writing implement 10, FIG. 3 is an equivalent circuit diagram of the piezoelectric vibrator 20, FIG. 4 is a circuit diagram of a self-excited oscillation circuit 30 that performs excitation and vibration detection of a brush lead.
本実施形態では筆記具 1 0はボールペンとして構成される。 図 1に示すように、 棒状の筆芯 1 2 (すなわちインク軸) は、 環状の支持固定具 1 4を介して円筒状 の外筒 1 6に固定されている。 この筆芯 1 2には、 その外周面上の筆芯 1 2の中 心軸 Cを挟んで対向する位置に一つまたは複数 (本実施形態では一つ) の対をな す平面部 1 2 pが形成され、 この平面部 1 2 pに、 それそれ平板状の圧電振動子 2 0 ( 2 0 a , 2 0 b ) が、 例えば接着剤によって貼付固定されている。 この圧 電振動子 2 0が自励発振回路 3 0 (図 4 ;後述) に組み込まれ、 筆芯 1 2を加振 する。 In the present embodiment, the writing implement 10 is configured as a ballpoint pen. As shown in FIG. 1, a rod-shaped brush lead 12 (that is, an ink shaft) is fixed to a cylindrical outer cylinder 16 via an annular support fixture 14. The brush core 12 has one or more (one in the present embodiment) pairs of flat portions 12 at positions facing the center axis C of the brush core 12 on the outer peripheral surface thereof. A p-shaped piezoelectric vibrator 20 (20a, 20b) is fixed to the flat portion 12p by, for example, an adhesive. This piezoelectric vibrator 20 is incorporated in a self-excited oscillation circuit 30 (FIG. 4; described later), and vibrates the brush lead 12.
圧電振動子 2 0は、 その中心が、 筆芯 1 2の非接触側の端部 1 2 aから長手方 向に筆芯 1 2の長さの 1 / 4離間した位置となるように設けられ、 また支持固定 具 1 4は、 筆芯 1 2の接触側の端部 1 2 bから長手方向に筆芯 1 2の長さの 1 / 4離間した位置に設けられている。 圧電振動子 2 0が振動すると、 筆芯 1 2は、 筆芯 1 2の長さを一波長とする定常波の振動モードで最も強く振動する。 これら の設置位置 (すなわち筆芯 1 2の長手方向両端 ( 1 2 a , 1 2 b ) から長手方向 にそれそれ筆芯 1 2の長さの 1 / 4内側に離間した位置) は、 この定常波の節で
ある。 すなわち、 筆芯 1 2は筆記具本体としての外筒 1 6に節の位置で支持され るため、 外筒 1 6の応力変化あるいは変形等により筆芯 1 2の振動が変化するの を抑制することができる。 ちなみに、 上記定常波では、 筆芯 1 2の長手方向両端 ( 1 2 a , 1 2 b ) および長手方向中央位置が振動の腹となる。 The piezoelectric vibrator 20 is provided so that the center thereof is located at a distance of 1/4 of the length of the brush lead 12 in the longitudinal direction from the end 12 a on the non-contact side of the brush lead 12. Further, the support fixture 14 is provided at a position spaced apart by 1/4 of the length of the brush lead 12 in the longitudinal direction from the end 12b on the contact side of the brush lead 12. When the piezoelectric vibrator 20 vibrates, the brush lead 12 vibrates most strongly in a standing wave vibration mode in which the length of the brush lead 12 is one wavelength. These installation positions (that is, positions separated from the longitudinal ends (12a, 12b) of the brush core 12 in the longitudinal direction by 1/4 of the length of the brush core 12, respectively) are In the section is there. In other words, since the brush core 12 is supported at the position of the node by the outer cylinder 16 as the writing implement body, it is necessary to suppress a change in vibration of the brush core 12 due to a stress change or deformation of the outer cylinder 16. Can be. Incidentally, in the above standing wave, both ends (12a, 12b) in the longitudinal direction and the center position in the longitudinal direction of the brush lead 12 are antinodes of vibration.
図 2に示すように、 圧電振動子 2 0は、 短冊状の薄板 (直方体) として構成さ れるセラミヅク基板 2 2と、 該セラミヅク基板 2 2の表面および裏面の全面にそ れそれ形成された一対の電極 (正極 2 4 a, 負極 2 4 b ) とを備える。 表面側の 電極 (正極) 2 4 aには、 リード線 2 6が接続されている。 本実施形態では圧電 振動子 2 0を平板状とすることで、 より容易にかつより高精度にこれを製作する ことができる。 圧電振動子 2 0の一対の電極 (2 4 a, 2 4 b ) には所定の条件 下で直流電圧が印加され、 これにより圧電振動子 2 0が分極処理される。 すなわ ち圧電振動子 2 0は、 表面および裏面に垂直な方向に分極され、 その分極方向は、 表面側から裏面側または裏面側から表面側である。 なお図 3に示すように、 上記 分極処理の施された圧電振動子 2 0は、 正極 2 4 aと負極 2 4 bとの間に、 イン ダク夕ンス成分 L、 キャパシタンス成分 C、 および抵抗成分 Rを直列に備え、 さ らにこれらと並列に制動容量成分 C dを備えた回路と、 等価である。 As shown in FIG. 2, the piezoelectric vibrator 20 includes a ceramic substrate 22 configured as a strip-shaped thin plate (a rectangular parallelepiped), and a pair of ceramic substrates 22 formed on the entire front and back surfaces of the ceramic substrate 22, respectively. (Positive electrode 24a, negative electrode 24b). A lead wire 26 is connected to the electrode (positive electrode) 24 a on the front side. In the present embodiment, the piezoelectric vibrator 20 can be manufactured more easily and with higher precision by making the piezoelectric vibrator 20 a flat plate. A DC voltage is applied to a pair of electrodes (24a, 24b) of the piezoelectric vibrator 20 under predetermined conditions, and the piezoelectric vibrator 20 is polarized. That is, the piezoelectric vibrator 20 is polarized in a direction perpendicular to the front surface and the back surface, and the polarization direction is from the front surface to the back surface or from the back surface to the front surface. As shown in FIG. 3, the piezoelectric vibrator 20 having been subjected to the above polarization treatment has an inductance component L, a capacitance component C, and a resistance component between the positive electrode 24a and the negative electrode 24b. This is equivalent to a circuit having R in series and further having a braking capacity component C d in parallel with them.
対をなす圧電振動子 2 0は、 筆芯 1 2の外周壁に中心軸 Cに対して互いに対称 な形状に変形しながら振動するように設けられるのが望ましい。 こうすることで 筆芯 1 2自体も中心軸 Cに対して対称な形状に変形しながら振動する。 圧電振動 子を筆芯の外周壁に一箇所のみ設けた場合、 筆芯は圧電振動子を設けた位置を中 心として伸縮 (振動) するため、 屈曲振動あるいは異常発振が生じやすくなる。 これに対し、 筆芯 1 2の外周壁に中心軸 Cに対して互いに対称な形状に変形しな がら振動するように設けることで、 圧電振動子 2 0および筆芯 1 2の屈曲振動や 異常発振等の発生を抑制し、 圧電振動子 2 0の駆動エネルギのロスを低減するこ とができる。 このような振動を得るため、 本実施形態では、 図 1に示すように、 平行に形成され対を成す平面部 1 2 pのそれぞれに、 各圧電振動子 (2 0 a , 2 O b ) の負極 (分極処理時に負電圧を印加した電極) 2 4 bが接合される。 これ により、 対をなす圧電振動子 2 0の分極方向は、 いずれも筆芯 1 2の径方向の内 側から外側に指向し、 それらは互いに筆芯 1 2の中心軸 Cを挟んで対称となる。
また、 これら対をなす圧電振動子 2 0は電気的に並列に設けられる。 具体的には、 図 4に示すように、 平面部 1 2 p側の電極 (すなわち負極) 2 4 b同士が接続さ れ、 反対側の正極 2 4 a同士が接続される。 ここで圧電振動子 2 0は印加電圧に 応じて分極方向に伸縮する。 このように設けられかつ並列接続された圧電振動子The paired piezoelectric vibrators 20 are desirably provided on the outer peripheral wall of the brush lead 12 so as to vibrate while deforming in a shape symmetrical with respect to the central axis C. In this way, the brush lead 12 itself vibrates while deforming into a shape symmetrical with respect to the central axis C. If only one piezoelectric vibrator is provided on the outer peripheral wall of the brush core, the brush core expands and contracts (vibrates) around the position where the piezoelectric vibrator is provided, so that bending vibration or abnormal oscillation is likely to occur. On the other hand, by providing the outer peripheral wall of the brush lead 12 so as to vibrate while deforming in a shape symmetrical with respect to the center axis C, bending vibration and abnormal Oscillation and the like can be suppressed, and loss of driving energy of the piezoelectric vibrator 20 can be reduced. In order to obtain such vibrations, in the present embodiment, as shown in FIG. 1, each of the plane portions 12 p formed in parallel and forming a pair has a piezoelectric vibrator (20 a, 2 O b). Negative electrode (electrode to which negative voltage was applied during polarization) 24 b is joined. As a result, the polarization directions of the paired piezoelectric vibrators 20 are all directed from the radially inner side to the outer side of the brush lead 12, and they are symmetric with respect to each other with the center axis C of the brush lead 12 interposed therebetween. Become. Further, these pairs of piezoelectric vibrators 20 are provided electrically in parallel. Specifically, as shown in FIG. 4, the electrodes (that is, the negative electrodes) 24 b on the plane portion 12 p side are connected to each other, and the positive electrodes 24 a on the opposite side are connected. Here, the piezoelectric vibrator 20 expands and contracts in the polarization direction according to the applied voltage. Piezoelectric vibrators thus provided and connected in parallel
2 0の対は、 筆芯 1 2の中心軸 Cについて対称な形状に変形しながら振動する。 なお、 圧電振動子 2 0は、 ポアソン比に応じて長手方向にも伸縮するが、 圧電振 動子 2 0は筆芯 1 2の長手方向に長いので、 筆芯 1 2には主として長手方向の縦 振動が生じる。 The pair 20 vibrates while being deformed into a shape symmetrical about the central axis C of the brush lead 12. Although the piezoelectric vibrator 20 expands and contracts in the longitudinal direction according to the Poisson's ratio, the piezoelectric vibrator 20 is long in the longitudinal direction of the brush core 12, so that the brush core 12 mainly has the longitudinal direction. Longitudinal vibration occurs.
本実施形態では、 インク軸としての筆芯 1 2の外壁 1 2 w (少なくとも平面部 1 2 p ) 表面の少なくとも一部は導体 (例えばアルミ合金等) として構成されて おり、 対をなす圧電振動子 2 0の筆芯 1 2側の電極 (ここでは負極) 2 4 bと導 通している。 このような構成により、 筆芯 1 2に接触して露出しない筆芯 1 2側 の電極 2 4 bに対し、 筆芯 1 2の導体部を介してより容易に電圧を印加すること ができる。 In this embodiment, at least a part of the surface of the outer wall 12 w (at least the plane portion 12 p) of the brush core 12 as an ink axis is configured as a conductor (for example, an aluminum alloy or the like), and a pair of piezoelectric vibrations It is in communication with the electrode (here, the negative electrode) 24 b on the brush core 12 of the child 20. With such a configuration, it is possible to more easily apply a voltage to the electrode 24 b on the side of the brush core 12 that is not exposed in contact with the brush core 12 via the conductor of the brush core 12.
また図 4に示すように、 本実施形態にかかる自励発振回路 3 0は、 増幅回路 3 2、 対をなす圧電振動子 2 0 ( 2 0 a , 2 O b ), およびフィル夕回路 3 4をこ の順に直列に接続して構成される。 このうちフィルタ回路 3 4は、 圧電振動子 2 0の不要振動 (スプリアス) の影響を抑制する作用を有する。 またその中心周波 数は、 圧電振動子 2 0の中心周波数にほぼ等しい。 圧電振動子 2 0の正極 2 4 a はフィル夕回路 3 4の入力端子に、 また圧電振動子 2 0の負極 2 4 bは増幅回路 As shown in FIG. 4, the self-excited oscillation circuit 30 according to the present embodiment includes an amplification circuit 32, a pair of piezoelectric vibrators 20 (20a, 2Ob), and a filter circuit 34. Are connected in series in this order. Among them, the filter circuit 34 has an action of suppressing the influence of unnecessary vibration (spurious) of the piezoelectric vibrator 20. The center frequency is substantially equal to the center frequency of the piezoelectric vibrator 20. The positive electrode 24 a of the piezoelectric vibrator 20 is connected to the input terminal of the filter circuit 34, and the negative electrode 24 b of the piezoelectric vibrator 20 is an amplifier circuit
3 2の出力端子に、 それそれ接続される。 また、 フィル夕回路 3 4の出力端子は 上記した筆芯 1 2の導体部 (外壁 1 2 w ) に接続されており、 この導体部は、 増 幅回路 3 2の出力端子と圧電振動子 2 0の負極 2 4 bとの間に介在することにな る。 このような構成において、 筆記中に筆芯 1 2の振動数の経時変化を、 この自 励発信回路 3 0の信号の周波数の経時変化として検出し、 検出デ一夕を予め登録 しておいた筆記者毎および筆記 (例えば署名) 毎の振動数の経時変化の登録デ一 夕と比較することにより、 筆記判別を行うことができる。 32 Each output terminal is connected. The output terminal of the filter circuit 34 is connected to the conductor (outer wall 12 w) of the brush core 12 described above. This conductor is connected to the output terminal of the amplifier circuit 32 and the piezoelectric vibrator 2. It will be interposed between the negative electrode 24 b of 0. In such a configuration, a change over time in the frequency of the writing lead 12 during writing is detected as a change over time in the frequency of the signal of the self-excited oscillation circuit 30, and the detected data is registered in advance. By comparing with the registered data of the change over time of the frequency for each writer and each written (for example, signature), the written judgment can be performed.
次に本発明の第二の実施形態について図面を参照して説明する。 本実施形態に かかる筆記具は、 圧電振動子 2 0に替えて圧電振動子 4 0を備える点以外、 上記
第一の実施形態と同じ構成を備える。 このため、 ここでは本実施形態にかかる圧 電振動子 4 0について説明し、 他の構成についての詳細な説明は省略する。 図 5 は、 圧電振動子 4 0の斜視図である。 Next, a second embodiment of the present invention will be described with reference to the drawings. The writing instrument according to the present embodiment is different from the writing instrument according to the first embodiment in that a piezoelectric vibrator 40 is provided instead of the piezoelectric vibrator 20. It has the same configuration as the first embodiment. For this reason, here, the piezoelectric vibrator 40 according to the present embodiment will be described, and detailed description of the other components will be omitted. FIG. 5 is a perspective view of the piezoelectric vibrator 40.
図 5に示すように、 圧電振動子 4 0は、 短冊状の薄板 (直方体) として構成さ れるセラミヅク基板 4 2と、 該セラミヅク基板 4 2の表面および裏面にそれそれ 形成された一対の電極 4 4 (正極 4 4 a, 負極 4 4 b ) とを備える。 本実施形態 では、 このセラミック基板 4 2の側面および表面に、 前記裏面の電極 4 4 bと導 通する導体膜 4 4 cが形成される。 この圧電振動子 4 0は、 裏面と筆芯 1 2の外 周表面とが接触するように筆芯 1 2に密着固定されるため、 本実施形態では、 導 体膜 4 4 cを介して、 筆芯 1 2に接触して露出しない筆芯 1 2側の電極 (ここで は負極 4 4 b ) に、 より容易に電圧を印加することができる。 このため、 筆芯 1 2に導体部を設ける必要は無い。 表面側では、 金属導体の薄膜が表面に形成され ていない分離帯 4 4 dにより、 正極 4 4 aと導体膜 4 4 cとが絶縁されている。 このとき正極 4 4 aの面積を導体膜 4 4 cの面積より大きくするのが望ましい。 この正極 4 4 aの面積が大きいほど、 圧電振動子 4 0はより広い領域で変形する ため、 屈曲振動および異常発振が抑制される。 正極 4 4 aにはリード線 4 6 aが、 また導体膜 4 4 cにはリード線 4 6 bが、 それそれ接続される。 また裏面側では 全面に負極 4 4 bが形成されている。 この圧電振動子 4 0についても上記実施形 態と同様に分極処理が施される。 As shown in FIG. 5, the piezoelectric vibrator 40 includes a ceramic substrate 42 configured as a strip-shaped thin plate (a rectangular parallelepiped), and a pair of electrodes 4 respectively formed on the front and back surfaces of the ceramic substrate 42. 4 (positive electrode 44a, negative electrode 44b). In the present embodiment, a conductor film 44 c communicating with the electrode 44 b on the back surface is formed on the side surface and the front surface of the ceramic substrate 42. The piezoelectric vibrator 40 is closely fixed to the brush lead 12 such that the back surface and the outer peripheral surface of the brush lead 12 are in contact with each other. A voltage can be more easily applied to the electrode (here, the negative electrode 44 b) on the side of the brush core 12 that is not exposed in contact with the brush core 12. For this reason, it is not necessary to provide a conductor portion on the brush lead 12. On the front surface side, the positive electrode 44a and the conductor film 44c are insulated by the separation band 44d in which the thin film of the metal conductor is not formed on the surface. At this time, it is desirable that the area of the positive electrode 44a be larger than the area of the conductive film 44c. As the area of the positive electrode 44a is larger, the piezoelectric vibrator 40 is deformed in a wider area, so that bending vibration and abnormal oscillation are suppressed. A lead wire 46a is connected to the positive electrode 44a, and a lead wire 46b is connected to the conductor film 44c. The negative electrode 44b is formed on the entire back surface. This piezoelectric vibrator 40 is also subjected to polarization processing in the same manner as in the above embodiment.
次に本発明の第三の実施形態について図面を参照して説明する。 本実施形態で は、 圧電振動子 5 0は三端子型であり、 それに伴い自励発振回路 6 0も上記第一 および第二の実施形態にかかる自励発振回路 3 0とは異なる構成となっているが、 それ以外の構成については、 上記第一および第二の実施形態と同様である。 この ため、 ここでは本実施形態にかかる圧電振動子 5 0および自励発振回路 6 0につ いて説明し、 他の構成についての詳細な説明は省略する。 図 6は、 圧電振動子 5 0の斜視図、 図 7は、 圧電振動子 5 0の等価回路図、 また図 8は、 自励発振回路 6 0の回路図である。 Next, a third embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the piezoelectric vibrator 50 is a three-terminal type, and accordingly, the self-excited oscillation circuit 60 has a different configuration from the self-excited oscillation circuit 30 according to the first and second embodiments. However, other configurations are the same as those in the first and second embodiments. For this reason, here, the piezoelectric vibrator 50 and the self-excited oscillation circuit 60 according to the present embodiment will be described, and detailed description of other configurations will be omitted. 6 is a perspective view of the piezoelectric vibrator 50, FIG. 7 is an equivalent circuit diagram of the piezoelectric vibrator 50, and FIG. 8 is a circuit diagram of the self-excited oscillation circuit 60.
図 6に示すように、 圧電振動子 5 0は、 短冊状の薄板 (直方体) として構成さ れるセラミヅク基板 5 2を備える。 セラミヅク基板 5 2の表面には二つの電極 (
第一電極 [駆動電極] 5 4 aおよび第三電極 [帰還電極] 5 4 c ) が形成され、 裏面には一つの電極 (第二電極 [接地電極] 5 4 b ) が形成される。 またセラミ ック基板 5 2の側面および表面には、 裏面の電極 (第二電極 5 4 b ) と導通する 導体膜 5 4 dが形成される。 表面側では、 第一電極 5 4 a、 第三電極 5 4 cおよ び導体膜 5 4 dがこの順に配置され、 これらの間はそれそれ、 分離帯 5 4 e, 5 4 f によって絶縁されている。 このとき、 第一電極 5 4 aの面積は、 上記第二の 実施形態の場合と同様の理由により、 第三電極 5 4 cおよび導体膜 5 4 dの合計 面積より大きくするのが望ましい。 また、 第一、 第三および導体膜 ( 5 4 a , 5 4 c , 5 4 d ) にはそれそれ、 リード線 (5 6 a , 5 6 b , 5 6 c ) が接続され る。 また裏面側では全面に第二電極 5 4 bが形成されている。 このような構成の 圧電振動子 5 0が、 図 1の圧電振動子 2 0に替えて、 裏面と筆芯 1 2の外周表面 とが接触するように筆芯 1 2に密着固定される。 なお図 7に示すように、 上記分 極処理を施された圧電振動子 5 0は、 第一電極 5 4 aと第三電極 5 4 cとの間に、 インダク夕ンス成分 L、 キャパシタンス成分 C;、 および抵抗成分 Rを直列に備え、 第一電極 5 4 aと第二電極 5 4 bとの間に制動容量成分 C d 1を備え、 また第二 電極 5 4 bと第三電極 5 4 cとの間に制動容量成分 C d 2を備える回路と、 等価 である。 As shown in FIG. 6, the piezoelectric vibrator 50 includes a ceramic substrate 52 configured as a strip-shaped thin plate (a rectangular parallelepiped). The surface of the ceramic substrate 52 has two electrodes ( A first electrode [drive electrode] 54a and a third electrode [return electrode] 54c) are formed, and one electrode (second electrode [ground electrode] 54b) is formed on the back surface. Further, on the side and front surfaces of the ceramic substrate 52, a conductive film 54d that is electrically connected to the back electrode (second electrode 54b) is formed. On the front side, the first electrode 54a, the third electrode 54c, and the conductor film 54d are arranged in this order, and the gap between them is insulated by the separators 54e, 54f, respectively. ing. At this time, the area of the first electrode 54a is preferably larger than the total area of the third electrode 54c and the conductor film 54d for the same reason as in the second embodiment. Lead wires (56a, 56b, 56c) are connected to the first, third and conductor films (54a, 54c, 54d), respectively. A second electrode 54b is formed on the entire back surface. The piezoelectric vibrator 50 having such a configuration is fixed to the brush lead 12 so that the back surface and the outer peripheral surface of the brush lead 12 are in contact with each other, instead of the piezoelectric vibrator 20 of FIG. As shown in FIG. 7, the piezoelectric vibrator 50 that has been subjected to the above-described polarization treatment has an inductance component L and a capacitance component C between the first electrode 54a and the third electrode 54c. And a resistance component R in series, a braking capacitance component C d 1 between the first electrode 54 a and the second electrode 54 b, and a second electrode 54 b and a third electrode 54 This is equivalent to a circuit having a braking capacity component C d 2 between the circuit and the circuit c.
また図 8に示すように、 本実施形態にかかる自励発振回路 6 0は、 増幅回路 3 2、 対をなす圧電振動子 5 0、 およびフィル夕回路 3 4をこの順に直列に接続し て構成される。 この場合、 第一電極 5 4 aはフィル夕回路 3 4の入力端子に、 ま た第三電極 5 4 cは増幅回路 3 2の出力端子に、 また第二電極 5 4 bは接地側に、 それそれ接続される。 産業上の利用可能性 As shown in FIG. 8, the self-excited oscillation circuit 60 according to the present embodiment is configured by connecting an amplifier circuit 32, a pair of piezoelectric vibrators 50, and a filter circuit 34 in series in this order. Is done. In this case, the first electrode 54a is connected to the input terminal of the filter circuit 34, the third electrode 54c is connected to the output terminal of the amplifier circuit 32, and the second electrode 54b is connected to the ground. It is connected it. Industrial applicability
以上説明したように、 本発明にかかる筆記具は、 筆芯に対する振動子の装着状 態のばらつきを抑制することができるとともに、 筆芯のアンバランスな変形に伴 う屈曲振動あるいは異常発振などを抑制することができる。 このため、 署名認証 を行うための筆記判別システムに用いるのに適している。
As described above, the writing implement according to the present invention can suppress variations in the mounting state of the vibrator with respect to the brush lead, and can suppress bending vibration or abnormal oscillation due to unbalanced deformation of the brush lead. can do. Therefore, it is suitable for use in a handwriting discrimination system for performing signature authentication.
Claims
1 . 筆記具本体に支持される筆芯と、 1. A brush core supported by the writing instrument body,
前記筆芯の外周表面上に筆芯の中心軸を挟んで対向するように設けられた振動 子の対と、 を備えた筆記判別システム用筆記具。 A writing instrument for a writing discrimination system, comprising: a pair of vibrators provided on the outer peripheral surface of the brush core so as to face each other across the central axis of the brush core.
2 . 筆芯の外周表面上に筆芯の中心軸を挟んで対向するように対をなす平面が形 成され、 2. A pair of planes is formed on the outer peripheral surface of the brush lead so as to face each other with the central axis of
前記振動子が平板状に形成され、 前記平面上に固定されることを特徴とする請 求の範囲第 1項に記載の筆記判別システム用筆記具。 2. The writing instrument for a writing discrimination system according to claim 1, wherein the vibrator is formed in a flat plate shape and is fixed on the flat surface.
3 . 前記振動子の対は、 板状の基板を備え、 該基板.の表裏両面に形成された電極 対により分極処理され、 3. The vibrator pair includes a plate-shaped substrate, and is polarized by electrode pairs formed on both front and back surfaces of the substrate.
前記振動子の対は、 各分極方向が筆芯の中心軸に対して対称となるよう設けら れることを特徴とする請求の範囲第 1項に記載の筆記判別システム用筆記具。 2. The writing implement for a writing discrimination system according to claim 1, wherein the pair of transducers are provided such that each polarization direction is symmetric with respect to a central axis of the writing core.
4 . 前記振動子は、 板状の基板を備え、 該基板の表裏両面に形成された電極対に より分極処理され、 また該基板の裏面と前記筆芯外周表面とが当接するよう筆芯 に固定され、 4. The vibrator includes a plate-shaped substrate, is polarized by electrode pairs formed on both front and back surfaces of the substrate, and is attached to the brush lead so that the back surface of the substrate comes into contact with the brush lead outer peripheral surface. Fixed,
前記基板の側面および/または表面に、 前記裏面の電極と導通する導体膜が形 成されることを特徴とする請求の範囲第 1項に記載の筆記判別システム用筆記具 (
On the side and / or the surface of the substrate, writing determination system for a writing instrument according to claim 1, wherein a conductive film electrically connected to the back electrode are made form (
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JP2002589960A JPWO2002093351A1 (en) | 2001-05-16 | 2002-05-16 | Writing implement for writing discrimination system |
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JP2001-145957 | 2001-05-16 | ||
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2024054549A1 (en) * | 2022-09-08 | 2024-03-14 | Microchip Technology Incorporated | Coding data into a handwritten sample |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5165832A (en) * | 1974-12-05 | 1976-06-07 | Matsushita Electric Ind Co Ltd | JOHONYURYO KUPEN |
JPS58121481A (en) * | 1982-01-14 | 1983-07-19 | Nippon Telegr & Teleph Corp <Ntt> | Handwritten information input pen |
US5111004A (en) * | 1991-05-23 | 1992-05-05 | Kumahira Safe Co., Inc. | Stylus for handwriting identification |
JP2001249761A (en) * | 2000-03-03 | 2001-09-14 | Axiom Co Ltd | System for judging writing and writing tool for judging writing and method for judging writing |
-
2002
- 2002-05-16 WO PCT/JP2002/004751 patent/WO2002093351A1/en active Application Filing
- 2002-05-16 JP JP2002589960A patent/JPWO2002093351A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5165832A (en) * | 1974-12-05 | 1976-06-07 | Matsushita Electric Ind Co Ltd | JOHONYURYO KUPEN |
JPS58121481A (en) * | 1982-01-14 | 1983-07-19 | Nippon Telegr & Teleph Corp <Ntt> | Handwritten information input pen |
US5111004A (en) * | 1991-05-23 | 1992-05-05 | Kumahira Safe Co., Inc. | Stylus for handwriting identification |
JP2001249761A (en) * | 2000-03-03 | 2001-09-14 | Axiom Co Ltd | System for judging writing and writing tool for judging writing and method for judging writing |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024054549A1 (en) * | 2022-09-08 | 2024-03-14 | Microchip Technology Incorporated | Coding data into a handwritten sample |
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