JP4274153B2 - Input pen shield structure - Google Patents

Input pen shield structure Download PDF

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JP4274153B2
JP4274153B2 JP2005160007A JP2005160007A JP4274153B2 JP 4274153 B2 JP4274153 B2 JP 4274153B2 JP 2005160007 A JP2005160007 A JP 2005160007A JP 2005160007 A JP2005160007 A JP 2005160007A JP 4274153 B2 JP4274153 B2 JP 4274153B2
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pen
input pen
inner cylinder
shape
control board
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JP2006338171A (en
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健二 川上
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Pentel Co Ltd
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Pentel Co Ltd
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本発明は、タブレット入力装置に使用する信号検出用入力ペンのシールド構造に関するものである。   The present invention relates to a shield structure for a signal detection input pen used in a tablet input device.

タブレット入力装置に使用する信号検出用入力ペンは、ペン先端をタブレットに近づけることで電気信号を検出し、タブレットの座標位置を表示画面上に表示することのできる入力ペンである。
入力ペンは、ペン先で受けた電気信号を入力座標位置として検出するため、外部から(近くにある機械や操作者が受ける、または自身が持っている)電磁ノイズが検出し、電気信号に歪みを与えることがある。入力ペンにノイズが発生するとタブレットの位置情報を狂わせ、タブレットと入力ペンのペン先の位置と表示された座標位置がずれてしまう原因になる。入力ペンは電磁ノイズをシールド(遮へい)するためと、強度を保つため外観に金属の筒(以下 外筒という)とし、検出信号に影響のないようにする構造が一般的に採用されている。入力ペンが受けたノイズは入力ペンの動作を制御する基板(以下 ペン基板という)に接続されたケーブルにより、タブレット本体の制御基板に接続され、タブレット本体の基板よりグランドからアースに逃がす構造を採用している。外筒とペン基板を電気的に接続する方法には、外筒のペン先先端方向内部に設置されたペン基板上の信号グランドからリード線を引き出し、外筒に半田付けする方法やカシメ等により機械的に接続する方法があるが、入力ペンの組立のしやすさを考えた場合、外筒内部形状に合った金属製のインサートリングを外筒に圧入固定し、ペン基板上の信号グランドに半田付けにより接続された金属製で弾性を有するグランド用スプリングに直接押し当て接触させる。またはインサートリングに設置、接触された金属製のガイドリングの内部底面にグランド用スプリングを押し当てて接続し、外筒の後端部のネジにネジが切られた金属金具の尾栓を螺合することで固定でき、電気的に接続することが実用的である。
また、入力ペンのシールド構造として、ペン先近辺にコイル巻回方向に導電ループを形成しない銅箔で覆い磁気シールドする方法が知られている。
特開平5−241715号。
The signal detection input pen used in the tablet input device is an input pen that can detect an electrical signal by bringing the tip of the pen close to the tablet and display the coordinate position of the tablet on the display screen.
Since the input pen detects the electrical signal received at the pen tip as the input coordinate position, it detects electromagnetic noise from the outside (received by the nearby machine or operator or possessed by itself) and distorts the electrical signal. May give. When noise occurs in the input pen, the position information of the tablet is distorted, and the position of the pen tip of the tablet and the input pen deviates from the displayed coordinate position. In general, the input pen is made of a metal cylinder (hereinafter referred to as an outer cylinder) in order to shield electromagnetic noise and keep its strength, so that it does not affect the detection signal. The noise received by the input pen is connected to the control board of the tablet body by a cable connected to the board that controls the operation of the input pen (hereinafter referred to as the pen board), and the structure that escapes from the ground of the tablet body to the ground is adopted. is doing. The method of electrically connecting the outer cylinder and the pen board is to pull out the lead wire from the signal ground on the pen board installed inside the pen tip direction of the outer cylinder and solder it to the outer cylinder or by caulking etc. Although there is a method of mechanical connection, when considering the ease of assembly of the input pen, a metal insert ring that matches the internal shape of the external cylinder is press-fitted and fixed to the external cylinder, and is connected to the signal ground on the pen board. It is directly pressed against a ground spring made of metal and connected by soldering. Alternatively, press and connect the ground spring to the inner bottom surface of the metal guide ring that is installed and contacted with the insert ring, and screw the metal plug tail plug into the screw at the rear end of the outer cylinder. It can be fixed by doing so, and it is practical to connect them electrically.
As a shield structure for an input pen, there is known a method of magnetic shielding by covering with a copper foil that does not form a conductive loop in the coil winding direction in the vicinity of the pen tip.
JP-A-5-241715.

しかしながら上記タブレット入力装置に使用する信号検出用入力ペンのシールド構造においては、リード線は作業性が悪く、分解がしにくい。また、グランド用スプリング使用して、インサートリングならびにガイドリングを使用する場合、スプリングを介するため内部での各部品が動くため組立作業が安定しないことと、外筒を取り付けてから動作確認するため不良が発生した場合に、どの部品の接触が不確実なのかが分かりにくく組立の作業を遅れらせる原因になっていた。また、部品数が多いためコストが上がるという課題があった。   However, in the shield structure of the signal detection input pen used in the tablet input device, the lead wire has poor workability and is difficult to disassemble. Also, when using an insert ring and a guide ring using a spring for grounding, each part inside moves because of the spring, and the assembly work is not stable, and it is defective because the operation is confirmed after the outer cylinder is installed. When this occurs, it is difficult to tell which parts are in contact with each other, which causes the assembly work to be delayed. In addition, there is a problem that the cost increases due to the large number of parts.

本発明は上記の問題点に鑑みなされたもので、タブレット入力装置に使用する信号検出用入力ペンのノイズ防止用シールド構造であって、前記入力ペン内部の制御基板全体を覆う導電性の円筒形状の内筒と、該内筒を覆う導電性の外筒とを備え、前記内筒を、前記入力ペンのペン先側の先端、または後端より、前記制御基板挿入することができる形状、かつ、前記円筒側面に溝を設けることにより前記制御基板を挿入した後にその制御基板の板厚側面に設けたグランドパターン前記溝を介して半田付けできる形状とし、前記円筒形状の一部を2ヵ所以上弾性を有するように折り曲げた形状に成形して前記導電性の外筒に接触させる、前記入力ペンのシールド構造を提案するものである。 The present invention has been made in view of the above problems, and is a shield structure for noise prevention of a signal detection input pen used in a tablet input device, and has a conductive cylindrical shape covering the entire control board inside the input pen. shape an inner cylinder, and a conductive outer cylinder covering the inner cylinder, the inner cylinder, the pen tip side of the tip of the input pen or the rear end, Ru can insert the control board and a shape that can be soldered through the groove to a ground pattern provided on the plate thickness side of the control board after insertion of the control board by Rukoto grooved on the cylindrical shape of the side surface, the cylindrical shape part two positions or more, and formed into a shape bent so as to have a resilient contacting the outer cylinder of the conductive and proposes a shield structure of the input pen.

基板と外観の外筒を確実に接触させる方法として外筒の内側に内筒を設け、内筒と基板を半田で接合し、内筒を外筒に圧入することで基板と外筒を完全に接触させる導電体の金属筒の2重構造とする。上記した構造にすることにより、部品数を減らし、組立、分解が容易な構造とし、確実で安定したシールド効果を得ることができる。   As a method of ensuring contact between the board and the outer cylinder, the inner cylinder is provided inside the outer cylinder, the inner cylinder and the board are joined by soldering, and the inner cylinder is press-fitted into the outer cylinder to completely connect the board and outer cylinder. A double structure of a metal tube of a conductor to be brought into contact is adopted. With the above-described structure, the number of parts can be reduced, the structure can be easily assembled and disassembled, and a reliable and stable shielding effect can be obtained.

ペン基板の入力電気信号を歪ませる作用のある電磁ノイズを外部から受けた場合、外筒で受けたノイズは外筒内面に弾性体で接触した内筒と、ペン基板のグランドを半田で接合することで基板のグランドに上記電磁ノイズを逃がすことがでる。ペン基板よりケーブルを介して本体基板よりアースに逃がすことにより、外部ノイズによる電気信号の歪みを無くすことができ、タブレットと入力ペンの座標位置ズレを防ぐことができる。   When electromagnetic noise that acts to distort the input electrical signal of the pen board is received from the outside, the noise received by the outer cylinder joins the inner cylinder in contact with the inner surface of the outer cylinder with an elastic body and the ground of the pen board with solder. As a result, the electromagnetic noise can be released to the ground of the substrate. By escaping from the pen substrate to the ground via the cable from the main body substrate, distortion of the electric signal due to external noise can be eliminated, and displacement of the coordinate position between the tablet and the input pen can be prevented.

以下、本発明の詳細を添付図面に基づいて説明する。図1は、本発明の一例である入力ペンの各部品構成を表す斜視図である。ペン先10は導電性を有する金属(アルミ、真鍮、鉄、ステンレス等)の軸10aに絶縁樹脂(ABS、POM、PC等)の入力部10bを一体成形し、信号を検出できる構成としている。ペン先10は金属性のチャック11により保持され交換可能な形状としている。チャック11は絶縁樹脂で成形されたホルダ12に保持されバネ13によりペン先10側の先端方向に常に押された状態にある。
ホルダ12はセンサ14、バネ13を保持し、ペン基板15の位置を決めるための溝12aを設けペン基板15を挿入することホルダ12とペン基板15の位置決めができる形状をしている。
Hereinafter, the details of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view showing a component configuration of an input pen as an example of the present invention. The pen tip 10 is configured such that an input portion 10b of an insulating resin (ABS, POM, PC, etc.) is integrally formed on a shaft 10a made of a conductive metal (aluminum, brass, iron, stainless steel, etc.) to detect a signal. The nib 10 is held by a metallic chuck 11 and has a replaceable shape. The chuck 11 is held by a holder 12 formed of an insulating resin and is always pushed by a spring 13 toward the tip of the pen tip 10.
The holder 12 holds the sensor 14 and the spring 13, and is provided with a groove 12 a for determining the position of the pen substrate 15, so that the holder 12 and the pen substrate 15 can be positioned by inserting the pen substrate 15.

ペン先10を押すとチャック11がホルダ12内移動し、チャック11の後端部はセンサ14内に入り込み入力ペン1の動作を開始する。ペン先10を離すとバネ13によりチャック11、ペン先10は元の位置に戻る。バネ13は金属で成形され、ペン基板15に半田で接合されている。ペン基板15には複数の電気信号を処理する回路(図示せず)とグランド(図示せず)が設けてあり、各信号とグランドは信号ケーブル16a、16bと16cによりタブレット21の制御基板22にコネクタ23接続されている。
取付リング17凸部17aの内側は、図2に示すように内筒3後端部3aが隙間無く挿入できる円形状17bとし、溝17cはペン基板15の突起部15aが挿入できる形状をしている。取付リング17凹部17d後端側は柔らかい樹脂(PET、塩ビ等)で成形されたケーブル16の保護用チューブ18と一体成形され、ケーブル16がチューブ内を通る形状としている。尾栓19はチューブ18と取付リング凹部17dが挿入できる円形状19aとし外側に外筒ネジ部2aと螺合するネジ19bが設けてある。
When the pen tip 10 is pressed, the chuck 11 moves into the holder 12, and the rear end of the chuck 11 enters the sensor 14 and starts the operation of the input pen 1. When the pen tip 10 is released, the chuck 11 and the pen tip 10 are returned to their original positions by the spring 13. The spring 13 is formed of metal and joined to the pen substrate 15 with solder. The pen substrate 15 is provided with a circuit (not shown) for processing a plurality of electrical signals and a ground (not shown). Each signal and ground are connected to the control board 22 of the tablet 21 by signal cables 16a, 16b and 16c. It is connected to the connector 23.
As shown in FIG. 2, the inner side of the convex portion 17a of the mounting ring 17 has a circular shape 17b into which the rear end portion 3a of the inner cylinder 3 can be inserted without a gap, and the groove 17c has a shape into which the protruding portion 15a of the pen substrate 15 can be inserted. is doing. The rear end side of the concave portion 17d of the mounting ring 17 is formed integrally with the protective tube 18 of the cable 16 formed of soft resin (PET, PVC, etc.), and the cable 16 has a shape passing through the tube. The tail plug 19 has a circular shape 19a into which the tube 18 and the mounting ring concave portion 17d can be inserted, and a screw 19b that is screwed into the outer cylinder screw portion 2a is provided on the outside.

本発明となる内筒3は金属で成形され、ペン先10側先端を4分割し交互に内側に折り曲げた部分3bがホルダ12を受け、曲げていない部分3cは弾性を有し、外筒内側2bに確実に圧入、接触する。内筒3後端部3aにはホルダ12とペン基板15が挿入できる円形状3dとし、ペン基板15が内筒内で回転することを防止するためペン基板15の突起部15aが挿入できる溝3e
を設け、溝3eの上下に基板側面15bが半田付けできる突起3fを設けた。突起3fの両端を切り欠き3gを設け、半田付けの熱を内筒3全体につたわりにくくした形状とした。
The inner cylinder 3 according to the present invention is formed of metal, and the tip 3 side tip is divided into four parts and alternately bent to the inside 3b receives the holder 12, and the unbent part 3c has elasticity, and the inner side of the outer cylinder Press-fit and contact 2b securely . A circular shape 3d into which the holder 12 and the pen substrate 15 can be inserted is formed in the rear end portion 3a of the inner cylinder 3, and a groove 3e into which the protruding portion 15a of the pen substrate 15 can be inserted in order to prevent the pen substrate 15 from rotating in the inner cylinder.
And a protrusion 3f on which the substrate side surface 15b can be soldered is provided above and below the groove 3e. Both ends of the projection 3f were cut out to form 3g so that the soldering heat was not easily attached to the entire inner cylinder 3.

外筒2は金属の円筒形状とし、先端ペン先10が挿入される側は細く絞られ形状2cとし(図3参照)、ペン先10が可動可能な円形状2dとしている。後端は内筒3が簡単に挿入できる円形状2eとし、取付リング17凸部17aが隙間無く収まる形状とし、内側には尾栓19のネジ部19aが螺合するようにネジ部2aを有する形状とする。   The outer cylinder 2 has a metal cylindrical shape, and the side into which the tip pen tip 10 is inserted is narrowed and formed into a shape 2c (see FIG. 3), and a circular shape 2d in which the pen tip 10 is movable. The rear end has a circular shape 2e into which the inner cylinder 3 can be easily inserted, the mounting ring 17 has a convex portion 17a with no gap, and has a screw portion 2a on the inner side so that the screw portion 19a of the tail plug 19 can be screwed together. Shape.

図1、4を元に外部電磁ノイズに対するシールド構造について説明する。
ホルダ12に取付られたペン基板15の突起部15aを内筒3の両側の溝3eに合わせ、ホルダ12が内筒3の先端方向の曲げ部3bに突き当まで挿入する。ペン基板15凸部15aの凹部15bが、内筒17の突起部3fと位置が合う。基板側面に設けたグランドパターン15cの側面凹部15bに内筒3の外側より半田にて接合できる。
取付リング17の円形状部17bに内筒3後端外径部3aを挿入し、ペン基板15突起部15aを溝17cに挿入する。
A shield structure against external electromagnetic noise will be described with reference to FIGS.
The protrusions 15 a of the pen substrate 15 attached to the holder 12 are aligned with the grooves 3 e on both sides of the inner cylinder 3, and the holder 12 is inserted into the bent part 3 b in the distal direction of the inner cylinder 3 until it abuts. The concave portion 15 b of the pen substrate 15 convex portion 15 a is aligned with the protruding portion 3 f of the inner cylinder 17. It can be joined to the side recess 15b of the ground pattern 15c provided on the side surface of the substrate by soldering from the outside of the inner cylinder 3.
The inner cylinder 3 rear end outer diameter portion 3a is inserted into the circular portion 17b of the mounting ring 17, and the pen substrate 15 protruding portion 15a is inserted into the groove 17c.

外筒2の後端部に設けられている円形状2c(図3参照)寄りに、内筒3の4分割されたペン先10側から挿入し、尾栓19で取付リング凸部17a後端を押し、外筒ネジ部2aに完全に螺合することで、内筒3と取付リング17が外筒2内に固定できる構造となる。
外筒2の先端側内面は絞り形状2bにより先端が細くなり、内筒17の4分割部分が確実に接触する長さと形状とする。4分割部分は弾性があるため比較的軽く尾栓19を螺合でき、確実に外筒2に接触することができる。
Inserted from the pen tip 10 side of the inner cylinder 3 divided into the circular shape 2c (see FIG. 3) provided at the rear end of the outer cylinder 2, and the rear end of the mounting ring convex part 17a by the tail plug 19 The inner cylinder 3 and the mounting ring 17 can be fixed in the outer cylinder 2 by pressing and completely screwing into the outer cylinder screw portion 2a.
The inner surface of the outer cylinder 2 on the front end side is made narrower by the aperture shape 2b, and the length and shape are such that the four divided parts of the inner cylinder 17 are in reliable contact. Since the four-divided portion is elastic, the tail plug 19 can be screwed relatively lightly and can reliably contact the outer cylinder 2.

ペン先10がタブレット上21に触れ、ペン先10を押すと入力ペン1は動作を開始し、タブレット21上の座標21x、21yの位置をペン先10内の金属軸10aが電気信号として感知しチャック11、バネ13に伝わりペン基板15に接続されたバネ13が電気信号としてペン基板15内の回路(図示せず)に伝える。回路(図示せず)で処理された電気信号がケーブル16a、16bを伝わりタブレット基板22にコネクタ23を介して接続される。タブレット制御基板22より表示画面上(図示せず)に入力ペン1の位置を表示する。   When the pen tip 10 touches the top 21 of the tablet and presses the pen tip 10, the input pen 1 starts to operate, and the position of the coordinates 21x and 21y on the tablet 21 is detected by the metal shaft 10a in the pen tip 10 as an electrical signal. The spring 13 transmitted to the chuck 11 and the spring 13 and connected to the pen substrate 15 transmits an electric signal to a circuit (not shown) in the pen substrate 15. Electrical signals processed by a circuit (not shown) are transmitted through the cables 16 a and 16 b and connected to the tablet substrate 22 via the connector 23. The position of the input pen 1 is displayed on the display screen (not shown) from the tablet control board 22.

外部より電磁ノイズの影響がある場合、外筒2で受けたノイズが内筒3の4分割接触カ所を介して内筒溝3eの突起よりペン基板15のグランド15dに逃がすことができる。ペン基板15よりケーブル16cを介してタブレット基板22よりアース25に逃がすことができる。
説明した構成にすることにより外部ノイズをグランドに逃がすことによりペン先10より検出された電気信号と電磁ノイズの伝わりを別にすることで電気信号にノイズの影響を与えないため、電気信号の歪みを無くすことができ、タブレット21と入力ペン1の座標21x、21yの位置ズレを防ぐことができる。
When there is an influence of electromagnetic noise from the outside, the noise received by the outer cylinder 2 can escape to the ground 15d of the pen substrate 15 from the protrusion of the inner cylinder groove 3e through the four-divided contact portion of the inner cylinder 3. The pen substrate 15 can escape from the tablet substrate 22 to the ground 25 via the cable 16c.
By using the configuration described above, the external noise is allowed to escape to the ground, so that the electrical signal detected from the pen tip 10 is separated from the electromagnetic noise so that the electrical signal is not affected by the noise. It is possible to eliminate the positional deviation between the coordinates 21x and 21y of the tablet 21 and the input pen 1.

図で第2の実施例として外筒との接触カ所を上下曲げた形状とし弾性を設けることで組立可能にした、基板上面に半田付けをするカ所を変えた内筒の例を挙げる。   In the figure, as a second embodiment, an example of an inner cylinder in which a place where soldering is performed on the upper surface of the substrate, which can be assembled by making the contact portion with the outer cylinder bent up and down and providing elasticity, will be given.

容量結合式座標検出装置の構成図Configuration diagram of capacitively coupled coordinate detector 本発明の要部斜視図Perspective view of essential parts of the present invention 本発明の要部断面図Main part sectional view of the present invention 本発明の要部断面図Main part sectional view of the present invention 第2の実施例斜視図Second embodiment perspective view

符号の説明Explanation of symbols

1 入力ペン
2 外筒
2a 円形状
2b 絞り内側
2c 絞り外側
2d ペン先挿入部
3 内筒
3a 後端部
3b 曲げ部
3c 曲げなし部
3d 円形状
3e 溝
3f 突起
3g 切り欠き
10 ペン先
10a 金属軸
10b 入力部
11 チャック
12 ホルダ
13 バネ
14 センサ
15 ペン基板
16a 信号ケーブル
16b 信号ケーブル
16c グランドケーブル
17 取付リング
17a 凸部
17b 円形状
17c 溝
17d 凹部
18 チューブ
19 尾栓
19a 円形状
19b ネジ部
21 タブレット
22 制御基板
23 コネクタ
24 コネクタ
25 アース
DESCRIPTION OF SYMBOLS 1 Input pen 2 Outer cylinder 2a Circular shape 2b Diaphragm inner side 2c Diaphragm outer side 2d Pen tip insertion part 3 Inner cylinder 3a Rear end part 3b Bending part 3c Unbending part 3d Circular shape 3e Groove 3f Protrusion 3g Notch 10 Pen tip 10a Metal shaft 10b Input part 11 Chuck 12 Holder 13 Spring 14 Sensor 15 Pen board 16a Signal cable 16b Signal cable 16c Ground cable 17 Mounting ring 17a Protrusion part 17b Circular shape 17c Groove 17d Concave part 18 Tube 19 Tail plug 19a Circular part 19b Screw part 21 Tablet 22 Control board 23 Connector 24 Connector 25 Ground

Claims (1)

タブレット入力装置に使用する信号検出用入力ペンのノイズ防止用シールド構造であって、前記入力ペン内部の制御基板全体を覆う導電性の円筒形状の内筒と、該内筒を覆う導電性の外筒とを備え、前記内筒を、前記入力ペンのペン先側の先端、または後端より、前記制御基板挿入することができる形状、かつ、前記円筒側面に溝を設けることにより前記制御基板を挿入した後にその制御基板の板厚側面に設けたグランドパターン前記溝を介して半田付けできる形状とし、前記円筒形状の一部を2ヵ所以上弾性を有するように折り曲げた形状に成形して前記導電性の外筒に接触させることを特徴とする、前記入力ペンのシールド構造。 A shield structure for preventing noise of a signal detection input pen used in a tablet input device, comprising a conductive cylindrical inner cylinder covering the entire control board inside the input pen, and a conductive outer cover covering the inner cylinder and a cylinder, said inner cylinder, the pen tip side of the tip of the input pen or the rear end, in shape Ru can be inserted said control board, and Ru is provided a groove in the cylindrical shape of the side surface folding a shape that can be soldered through the groove to a ground pattern provided on the plate thickness side of the control board after insertion of the control board by a portion of the cylindrical two positions or more, so as to have elasticity shape molded into the constitution contacting the outer cylinder of said conductive shield structure of the input pen.
JP2005160007A 2005-05-31 2005-05-31 Input pen shield structure Expired - Fee Related JP4274153B2 (en)

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Publication number Priority date Publication date Assignee Title
WO2013187024A1 (en) * 2012-06-12 2013-12-19 パナソニック株式会社 Electronic pen and image display system provided with electronic pen
WO2017134920A1 (en) * 2016-02-01 2017-08-10 株式会社ワコム Electronic pen

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