JP2016081818A - Capacitance type input device - Google Patents

Capacitance type input device Download PDF

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JP2016081818A
JP2016081818A JP2014214190A JP2014214190A JP2016081818A JP 2016081818 A JP2016081818 A JP 2016081818A JP 2014214190 A JP2014214190 A JP 2014214190A JP 2014214190 A JP2014214190 A JP 2014214190A JP 2016081818 A JP2016081818 A JP 2016081818A
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electrode
conductive
circuit board
light
plate
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JP6193201B2 (en
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健正 渋井
Kensho Shibui
健正 渋井
松本　周三
Shuzo Matsumoto
周三 松本
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Shin Etsu Polymer Co Ltd
Shin Etsu Chemical Co Ltd
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Shin Etsu Polymer Co Ltd
Shin Etsu Chemical Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a capacitance type input device having little possibility of deteriorating durability of electrodes, even if high temperatures are applied to an operation switch.SOLUTION: This capacitance type input device includes a circuit board 10 built in the casing 2 of an electromagnetic cooker, and an operation switch 20 provided on the top plate 3 of the casing 2 and touch-operated by a finger 50, and the circuit board 10 is placed face to face with the top plate 3 with a gap kept between. Electrodes 11 are formed on the surface of the circuit board 10 facing the top plate 3, a conductive connection body 30 having heat resistance of at least not less than 180°C is interposed in the gap between the electrode 11 and the top plate 3, elasticity is given to the electrode facing part 32 of the conductive connection body 30, which at least faces the electrode 11, and a plate facing part 33 brought into facing contact with the top plate 3, at least a part of the electrode facing part 32 is connected to the electrode 11 of the circuit board 10, and the plate facing part 33 is placed so as to face the operation switch 20.SELECTED DRAWING: Figure 1

Description

本発明は、電磁調理器等からなる加熱機器の操作に利用される静電容量型入力装置に関するものである。   The present invention relates to a capacitance-type input device used for operation of a heating device including an electromagnetic cooker or the like.

近年、コイルに流れる電流により、所定の金属からなる調理器具を自己発熱させる加熱用の電磁調理器（ＩＨ調理器とも、ＩＨクッキングヒータとも呼ばれる）が注目されている。この電磁調理器は、ガスや火を使用せず、電力のみで動作し、しかも、加熱管理の制御が簡単かつ容易であるので、実に便利である（特許文献１、２参照）。   2. Description of the Related Art In recent years, an electromagnetic cooker for heating (also referred to as an IH cooker or an IH cooking heater) has been attracting attention in which a cooking utensil made of a predetermined metal is self-heated by a current flowing through a coil. This electromagnetic cooker is very convenient because it does not use gas or fire, operates only with electric power, and control of heating management is simple and easy (see Patent Documents 1 and 2).

この種の電磁調理器１は、図７や図８に示すように、例えば調理台に設置されて調理器具を搭載する大型の筺体２と、この筺体２に配設される静電容量型入力装置とを備え、この静電容量型入力装置が操作体である指５０でタッチ操作されることにより、加熱機能、自動調理機能、保温機能、タイマー機能等を発揮する。   As shown in FIGS. 7 and 8, this type of electromagnetic cooker 1 is, for example, a large case 2 installed on a cooking table and equipped with a cooking utensil, and a capacitance-type input disposed on the case 2. The capacitance type input device is touch-operated with a finger 50 as an operating body, thereby exhibiting a heating function, an automatic cooking function, a heat retaining function, a timer function, and the like.

筺体２は、その上部に絶縁性の平坦なトッププレート３が装着され、このトッププレート３に複数の加熱搭載領域４が配列形成されており、各加熱搭載領域４が所定の金属からなる鍋等の調理器具を搭載する。筺体２の内部には図示しないが、各加熱搭載領域４の直下に位置し、高周波交流電力により磁界を発生させるコイルと、商用電源を整流して直流パルス電力に変換し、この直流パルス電力を２０〜３０ｋＨｚの高周波電力に変換してコイルに給電するインバータ回路と、このインバータ回路を制御する制御手段とがそれぞれ内蔵されている。   The casing 2 is provided with an insulating flat top plate 3 on the top, and a plurality of heating mounting areas 4 are arranged on the top plate 3, and each heating mounting area 4 is made of a predetermined metal. Equipped with cooking utensils. Although not shown in the inside of the housing 2, it is located immediately below each heating mounting area 4, a coil that generates a magnetic field by high-frequency AC power, and a commercial power source is rectified and converted to DC pulse power. An inverter circuit that converts the high frequency power into 20 to 30 kHz and supplies power to the coil, and a control unit that controls the inverter circuit are incorporated therein.

筺体２のトッププレート３は、耐久性、耐熱性、誘電特性、絶縁性を確保し、かつ磁束透過プレートして機能するため、公知の強化ガラスが利用される。このトッププレート３の筺体２正面寄りの前部左右方向には、静電容量型入力装置が液晶表示部等と共に配設されている。   Since the top plate 3 of the casing 2 ensures durability, heat resistance, dielectric properties, and insulation and functions as a magnetic flux transmission plate, known tempered glass is used. In the front left and right directions of the top plate 3 near the front of the housing 2, a capacitive input device is disposed together with a liquid crystal display unit and the like.

静電容量型入力装置は、図７や図８に示すように、電磁調理器１の筺体２に内蔵されてトッププレート３に隙間をおいて対向する回路基板１０と、トッププレート３の前部表面に積層されて複数の加熱搭載領域４に対応し、指５０でタッチ操作される複数の操作スイッチ２０とを備え、これら回路基板１０と複数の操作スイッチ２０とがトッププレート３を介して対向し、このトッププレート３の裏面には、各操作スイッチ２０用の複数の電極１１がＩＴＯやカーボンペースト等により直接印刷されている（特許文献１参照）。   As shown in FIG. 7 and FIG. 8, the capacitance-type input device includes a circuit board 10 that is built in the housing 2 of the electromagnetic cooker 1 and faces the top plate 3 with a gap, and a front portion of the top plate 3. A plurality of operation switches 20 stacked on the surface and corresponding to the plurality of heating mounting regions 4 and touch-operated with a finger 50 are provided, and the circuit board 10 and the plurality of operation switches 20 face each other with the top plate 3 therebetween. A plurality of electrodes 11 for each operation switch 20 are directly printed on the back surface of the top plate 3 with ITO, carbon paste, or the like (see Patent Document 1).

回路基板１０とトッププレート３の複数の電極１１とには、屈曲変形可能な板バネ１４が介在して接続され、各板バネ１４の接続により、回路基板１０と複数の電極１１とが電気的に導通する。また、各操作スイッチ２０は、加飾された複数のスイッチ部２２を並べ備え、各スイッチ部２２の表面やその周縁部付近に、電磁調理器１の諸機能（例えば、電源切／入等）を示す意匠が施されており、各スイッチ部２２の裏面に、電磁調理器１の機能に対応する電極１１がトッププレート３を介して対向する。   The circuit board 10 and the plurality of electrodes 11 of the top plate 3 are connected via a plate spring 14 that can be bent and deformed, and the circuit board 10 and the plurality of electrodes 11 are electrically connected by the connection of each plate spring 14. Conducted to. In addition, each operation switch 20 includes a plurality of decorated switch portions 22 arranged, and various functions of the electromagnetic cooking device 1 (for example, power off / on, etc.) on the surface of each switch portion 22 and its peripheral portion. The electrode 11 corresponding to the function of the electromagnetic cooker 1 is opposed to the back surface of each switch part 22 via the top plate 3.

上記において、例えば所定の加熱搭載領域４に搭載した調理器具を加熱するため、操作スイッチ２０のスイッチ部２２を指５０でタッチ操作すると、コイルに高周波電流が流れ、このコイルを取り巻くように磁力線が発生し、この磁力線の発生により、調理器具の底部に渦電流が流れる（電磁誘導現象）。   In the above, for example, in order to heat the cooking utensil mounted in the predetermined heating mounting area 4, when the switch portion 22 of the operation switch 20 is touch-operated with the finger 50, a high-frequency current flows through the coil, and magnetic lines of force surround the coil. The eddy current flows to the bottom of the cooking utensil due to the generation of the magnetic field lines (electromagnetic induction phenomenon).

この際、操作スイッチ２０のスイッチ部２２に指５０が接触すると、電極１１と指５０との間にトッププレート３を挟むキャパシタが形成されて静電容量が変化し、この静電容量の変化が変換回路で電圧に変換され、制御手段のアナログデジタルコンバータでデジタルデータに変換される。変換されたデジタルデータは、制御手段のＣＰＵの制御プログラムにより閾値と比較され、スイッチのＯＮ、ＯＦＦ状態が判断される。   At this time, when the finger 50 comes into contact with the switch portion 22 of the operation switch 20, a capacitor that sandwiches the top plate 3 is formed between the electrode 11 and the finger 50, and the capacitance changes. The voltage is converted into voltage by the conversion circuit, and converted into digital data by the analog-digital converter of the control means. The converted digital data is compared with a threshold value by the control program of the CPU of the control means, and the ON / OFF state of the switch is determined.

調理器具の底部に渦電流が流れると、調理器具の金属には電気抵抗があるので、ジュール熱が発生し、調理器具の底部（磁性体）が加熱されて調理が可能となる（誘導加熱現象）。この際、調理には燃焼を伴わないので、着衣に火がついたり、立ち消えの心配がなく、室内の空気汚染を招くこともない。   When an eddy current flows through the bottom of the cooking utensil, the metal of the cooking utensil has electrical resistance, so Joule heat is generated and the bottom (magnetic body) of the cooking utensil is heated to allow cooking (induction heating phenomenon) ). At this time, since cooking does not involve combustion, there is no fear that the clothes will catch fire, disappear, and indoor air pollution will not occur.

特開２００６‐３１８７３５号公報JP 2006-318735 A 特開２００８‐１９２３３６号公報JP 2008-192336 A

従来における静電容量型入力装置は、以上のように構成され、トッププレート３に電極１１がＩＴＯやカーボンペースト等を用いて単に印刷されているので、操作スイッチ２０に高温が作用すると、電極１１の耐久性が低下するおそれがある。この点について説明すると、例えばトッププレート３の加熱搭載領域４から操作スイッチ２０付近に天ぷら調理直後の高温の調理器具がずれてその底部が置かれると、トッププレート３と電極１１間の熱膨張収縮差により電極１１の耐久性が低下し、その結果、電極１１が熱劣化して剥離し、導通に支障を来すおそれがある。   The conventional capacitance-type input device is configured as described above, and the electrode 11 is simply printed on the top plate 3 using ITO, carbon paste, or the like. There is a risk that the durability of the material may be reduced. Explaining this point, for example, when a high-temperature cooking utensil immediately after tempura cooking is shifted from the heating mounting area 4 of the top plate 3 in the vicinity of the operation switch 20 and the bottom thereof is placed, the thermal expansion and contraction between the top plate 3 and the electrode 11 is performed. Due to the difference, the durability of the electrode 11 decreases, and as a result, the electrode 11 may be thermally deteriorated and peeled off, which may hinder conduction.

また、従来における電磁調理器１は、優れた特徴を有するが、操作スイッチ２０を照光させることができれば、安全性等にさらに資することができる。この点について説明すると、電磁調理器１は、ガスコンロに比べ、安全ではあるものの、作動しているか否かを明瞭に把握することができないという特質がある。また、電磁調理器１のトッププレート３は、放熱性に劣る強化ガラスが多用される関係上、調理後、暫くは一部の領域が高温であり、高温の領域を正確に認識することも容易ではない。   Moreover, although the conventional electromagnetic cooker 1 has the outstanding characteristic, if the operation switch 20 can be illuminated, it can contribute further to safety etc. When this point is explained, although it is safer than the gas stove, the electromagnetic cooker 1 has a characteristic that it cannot clearly grasp whether or not it is operating. Moreover, the top plate 3 of the electromagnetic cooking device 1 has a high temperature in a part of the area for a while after cooking due to the fact that tempered glass with poor heat dissipation is often used, and it is easy to accurately recognize the high temperature area. is not.

この点に鑑み、電磁調理器１の作動中やトッププレート３の温度が高い間、操作スイッチ２０の少なくとも一部、例えばスイッチ部２２やその周縁を照光させることができれば、使用者の注意を視覚的に喚起することが可能となる。使用者の注意を喚起することができれば、使用者がその場から離れるのを防いだり、誤操作を防いだり、薄暗い環境での操作が可能となり、電磁調理器１の安全性や操作性をさらに向上させることができるので、非常に有意義である。   In view of this point, if at least a part of the operation switch 20, for example, the switch unit 22 or its periphery can be illuminated while the electromagnetic cooker 1 is operating or the temperature of the top plate 3 is high, the user's attention is visually recognized. Can be aroused. If the user's attention can be alerted, the user can be prevented from leaving the site, erroneous operation can be prevented, and operation in a dim environment is possible, further improving the safety and operability of the electromagnetic cooker 1. This is very meaningful.

本発明は上記に鑑みなされたもので、例えプレートの操作スイッチに高温が作用しても、電極の耐久性が低下するおそれが少ない静電容量型入力装置を提供することを目的としている。また、操作スイッチを照光させて加熱機器の性能を向上させることを他の目的としている。   The present invention has been made in view of the above, and an object of the present invention is to provide a capacitance-type input device that is less likely to deteriorate the durability of an electrode even when a high temperature acts on an operation switch of a plate. Another object is to improve the performance of the heating device by illuminating the operation switch.

本発明においては上記課題を解決するため、加熱機器に内蔵される回路基板と、加熱機器の筺体のプレートに設けられて操作体に操作される操作スイッチとを備え、回路基板と筺体のプレートとを隙間をおいて対向させた装置であって、
回路基板のプレートに対向する対向面に電極を形成し、回路基板の電極とプレートとの隙間に、少なくとも１８０℃以上の耐熱性を有する導電接続体を介在し、この導電接続体の少なくとも電極に対向する電極対向部とプレートに対向接触するプレート対向部とに弾性をそれぞれ付与し、導電接続体の電極対向部の少なくとも一部分を回路基板の電極に接続するとともに、導電接続体のプレート対向部を操作スイッチに対向させるようにしたことを特徴としている。 In order to solve the above-described problems, the present invention includes a circuit board built in the heating device, and an operation switch that is provided on the housing plate of the heating device and is operated by the operation body. Is a device that faces each other with a gap,
An electrode is formed on the surface facing the plate of the circuit board, and a conductive connector having a heat resistance of at least 180 ° C. is interposed in the gap between the electrode of the circuit board and the plate, and at least the electrode of the conductive connector Elasticity is imparted to the opposing electrode opposing portion and the opposing plate opposing portion to the plate, and at least a part of the electrode opposing portion of the conductive connector is connected to the electrode of the circuit board. It is characterized by facing the operation switch.

なお、加熱機器を電磁加熱機器とし、この電磁加熱機器の筺体のプレートを磁束透過プレートとすることができる。
また、プレートに光透過性を付与し、導電接続体に、回路基板方向の光源から操作スイッチ方向に光線を透過させる光線透過部を設けることができる。
また、回路基板の電極に中空部を形成し、導電接続体を導電ゴムとし、この導電ゴムに、電極の中空部に連通する連通孔を設け、この導電ゴムの連通孔を光線透過部とすることができる。 The heating device may be an electromagnetic heating device, and the casing plate of the electromagnetic heating device may be a magnetic flux transmission plate.
Further, the plate can be provided with a light transmission property, and the conductive connection body can be provided with a light transmission portion that transmits light in the operation switch direction from the light source in the circuit board direction.
Further, a hollow part is formed in the electrode of the circuit board, the conductive connecting body is made of conductive rubber, a communication hole communicating with the hollow part of the electrode is provided in the conductive rubber, and the communication hole of the conductive rubber is used as a light transmitting part. be able to.

また、回路基板の電極に中空部を形成し、導電接続体を導電ゴムとし、この導電ゴムに、電極の中空部に連通する複数の連通孔を設け、この複数の連通孔を光線透過部として各連通孔の幅を電極の中空部の幅よりも狭くすることもできる。
また、回路基板の電極に中空部を形成し、導電接続体を導電ゴムとし、この導電ゴムに、電極の中空部に連通する連通孔を設けるとともに、この導電ゴムの連通孔に光透過性のエラストマーを設け、この光透過性のエラストマーを光線透過部とすることもできる。 Further, a hollow part is formed in the electrode of the circuit board, the conductive connecting body is made of conductive rubber, a plurality of communication holes communicating with the hollow part of the electrode are provided in the conductive rubber, and the plurality of communication holes are used as a light transmitting part. The width of each communication hole can be made narrower than the width of the hollow portion of the electrode.
In addition, a hollow portion is formed in the electrode of the circuit board, the conductive connecting body is made of conductive rubber, and the conductive rubber is provided with a communication hole communicating with the hollow portion of the electrode. An elastomer can be provided, and this light-transmitting elastomer can be used as a light transmission part.

また、回路基板の電極に中空部を形成し、導電接続体を、導電ゴムと光透過性の絶縁ゴムとが交互に並んだ電気コネクタとし、この電気コネクタの絶縁ゴムを電極の中空部に対向させて光線透過部とすることが可能である。
また、回路基板の電極に中空部を形成し、導電接続体を、絶縁エラストマーの中央部付近に、電極の中空部に連通する連通孔を設けるとともに、この連通孔を光線透過部とし、絶縁エラストマーの中央部付近以外の箇所に、厚さ方向に伸びる導電ワイヤ、導電ピン、又は導電メッシュを埋め設けることで構成することが可能である。 Also, a hollow part is formed in the electrode of the circuit board, and the conductive connector is an electric connector in which conductive rubber and light-transmissive insulating rubber are alternately arranged, and the insulating rubber of this electric connector is opposed to the hollow part of the electrode. It is possible to make it a light transmission part.
In addition, a hollow portion is formed in the electrode of the circuit board, and the conductive connector is provided with a communication hole that communicates with the hollow portion of the electrode in the vicinity of the central portion of the insulating elastomer. It is possible to constitute by embedding a conductive wire, a conductive pin, or a conductive mesh extending in the thickness direction at a location other than the vicinity of the central portion of the.

また、回路基板の電極に中空部を形成し、導電接続体を金属ブロックとし、この金属ブロックの中央部付近に、電極の中空部に連通する連通孔を設けるとともに、この連通孔を光線透過部とし、金属ブロックの両端面に、圧縮変形可能な導電エラストマーをそれぞれ取り付け、これらの導電エラストマーを電極対向部とプレート対向部とすることも可能である。   In addition, a hollow portion is formed in the electrode of the circuit board, the conductive connection body is a metal block, a communication hole communicating with the hollow portion of the electrode is provided near the central portion of the metal block, and the communication hole is formed as a light transmitting portion. It is also possible to attach conductive elastomers that can be compressed and deformed to both end faces of the metal block, and to use these conductive elastomers as electrode facing portions and plate facing portions.

ここで、特許請求の範囲における加熱機器には、少なくともコンロ、電磁加熱機器、ホットプレート等が含まれ、電磁加熱機器には、例えば電磁調理器、電磁フライヤー、電磁グリドル等が含まれる。また、回路基板の電極や操作スイッチは、単数複数を特に問うものではない。回路基板には、電極の中空部内に位置する光源を設置することができる。電極は、必要に応じ、平面リング形や枠形等に形成することができる。   Here, the heating device in the claims includes at least a stove, an electromagnetic heating device, a hot plate, and the like, and the electromagnetic heating device includes, for example, an electromagnetic cooker, an electromagnetic fryer, an electromagnetic griddle, and the like. Further, the circuit board electrodes and operation switches are not particularly limited. A light source located in the hollow part of the electrode can be installed on the circuit board. The electrode can be formed into a planar ring shape, a frame shape, or the like as required.

プレートは、光透過性が要求される場合には、透明、半透明、白色等でも良い。このプレートには光拡散部材を積層して導電接続体に対向させ、光拡散部材により、回路基板方向からの光線を操作スイッチ方向に拡散させることができる。また、操作スイッチは、プレートの表面あるいは裏面に印刷したり、貼り着けることが可能である。さらに、導電接続体については、使用時の温度上昇に対して十分な耐熱性を有する材料により、柱形やブロック形等に形成し、ゴム部分あるいは絶縁エラストマー部分のＪＩＳ Ｋ６２５３に基づくショアＡ硬度を、Ａ２０〜Ａ８０の範囲とすることができる。   The plate may be transparent, translucent, white, etc. if light transparency is required. A light diffusing member is laminated on the plate so as to face the conductive connector, and the light diffusing member can diffuse light rays from the circuit board direction in the operation switch direction. The operation switch can be printed on or attached to the front or back surface of the plate. Furthermore, the conductive connector is formed into a column shape, a block shape, or the like with a material having sufficient heat resistance against temperature rise during use, and has a Shore A hardness based on JIS K6253 of the rubber portion or the insulating elastomer portion. , A20 to A80.

本発明によれば、加熱機器の操作スイッチが操作体で操作されると、回路基板の電極と操作体との間にプレートを挟むキャパシタが形成され、静電容量が変化する。電極の形成箇所が、筺体を構成するプレートではなく、プレートから離れた回路基板なので、例えプレートの操作スイッチ付近に高温の金属磁性体等が位置しても、プレートと電極間の熱膨張収縮差により、電極が熱劣化するおそれが少ない。   According to the present invention, when the operation switch of the heating device is operated by the operating body, a capacitor is formed that sandwiches the plate between the electrode of the circuit board and the operating body, and the capacitance changes. Since the electrode is formed not on the plate constituting the housing but on the circuit board separated from the plate, even if a high-temperature metallic magnetic body is located near the operation switch on the plate, the thermal expansion / contraction difference between the plate and the electrode Therefore, there is little possibility that the electrode is thermally deteriorated.

本発明によれば、回路基板のプレートに対向する対向面に電極を形成し、この電極とプレートの隙間に、少なくとも１８０℃以上の耐熱性を有する導電接続体を介在するので、例えプレートの操作スイッチに高温が作用しても、電極の耐久性が低下するおそれが少ないという効果がある。   According to the present invention, the electrode is formed on the surface facing the plate of the circuit board, and the conductive connector having a heat resistance of at least 180 ° C. is interposed in the gap between the electrode and the plate. Even if high temperature acts on the switch, there is an effect that the durability of the electrode is less likely to be lowered.

請求項２記載の発明によれば、操作スイッチを照光させ、使用者の注意を喚起することができるので、加熱機器の使用者がその場から離れるのを防いだり、操作スイッチの操作の適正化を図ったり、暗い環境での操作を実現することができる。したがって、加熱機器の安全性や操作性を向上させることができる。   According to the second aspect of the present invention, the operation switch can be illuminated to alert the user, so that the user of the heating device can be prevented from leaving the place or the operation switch can be operated appropriately. And can be operated in a dark environment. Therefore, the safety and operability of the heating device can be improved.

請求項３記載の発明によれば、導電接続体を導電ゴムとするので、例えばアッセンブル工程の省力化や量産性の向上が期待できる。また、導電接続体を、弾性特性や圧縮永久歪み特性に優れる導電性のシリコーンゴムとすれば、スプリング機能の耐久性等を向上させることができる。   According to the invention described in claim 3, since the conductive connecting member is made of conductive rubber, for example, labor saving in the assembly process and improvement in mass productivity can be expected. Further, if the conductive connector is made of conductive silicone rubber having excellent elastic characteristics and compression set characteristics, the durability of the spring function can be improved.

請求項４記載の発明によれば、導電ゴムの連通孔に光透過性のエラストマーを設けるので、誘電率を向上させ、静電容量を増大させることが可能となる。また、光透過性のエラストマーにより、操作スイッチ方向に光線を照射する光源を保護したり、導電接続体の構成の多様化を図ることが可能になる。   According to the fourth aspect of the present invention, since the light transmitting elastomer is provided in the communicating hole of the conductive rubber, the dielectric constant can be improved and the electrostatic capacity can be increased. In addition, the light-transmitting elastomer can protect the light source that emits light in the direction of the operation switch, and can diversify the configuration of the conductive connector.

請求項５記載の発明によれば、導電接続体を導電ゴムと絶縁ゴムとが交互に並んだ電気コネクタとし、回路基板の電極やプレートに対する接触範囲を拡大するので、接続が安定して接続不良を抑制することができる。また、回路基板の電極やプレートに対するランダム接続も可能になる。   According to the invention described in claim 5, the conductive connector is an electrical connector in which conductive rubber and insulating rubber are alternately arranged, and the contact range with respect to the electrodes and the plate of the circuit board is expanded. Can be suppressed. Also, random connection to the electrodes and plates of the circuit board is possible.

本発明に係る静電容量型入力装置の実施形態を模式的に示す断面説明図である。It is a section explanatory view showing typically an embodiment of a capacitance type input device concerning the present invention. 本発明に係る静電容量型入力装置の実施形態における導電接続体を模式的に示す斜視説明図である。It is a perspective explanatory view showing typically the conductive connection object in the embodiment of the capacitive input device according to the present invention. 本発明に係る静電容量型入力装置の第２の実施形態を模式的に示す断面説明図である。It is a section explanatory view showing typically a 2nd embodiment of a capacitance type input device concerning the present invention. 本発明に係る静電容量型入力装置の第３の実施形態を模式的に示す断面説明図である。It is a section explanatory view showing typically a 3rd embodiment of a capacitance type input device concerning the present invention. 本発明に係る静電容量型入力装置の第４の実施形態における導電接続体を模式的に示す断面説明図である。It is a section explanatory view showing typically the conductive connection object in a 4th embodiment of the capacity type input device concerning the present invention. 本発明に係る静電容量型入力装置の第５の実施形態における導電接続体を模式的に示す断面説明図である。It is a section explanatory view showing typically the conductive connection object in a 5th embodiment of the capacity type input device concerning the present invention. 電磁調理器を模式的に示す全体説明図である。It is whole explanatory drawing which shows an electromagnetic cooker typically. 従来における静電容量型入力装置を示す断面説明図である。It is sectional explanatory drawing which shows the electrostatic capacitance type input device in the past.

以下、図面を参照して本発明の好ましい実施の形態を説明すると、本実施形態における静電容量型入力装置は、図１や図２、図７に示すように、大型の電磁調理器１の筺体２に内蔵される回路基板１０と、筺体２のトッププレート３に積層されて導電性の操作体である指５０にタッチ操作される操作スイッチ２０とを備え、指５０のタッチ操作に伴う静電容量の変化を検出する装置であり、回路基板１０に形成した複数の電極１１と透明のトッププレート３との隙間に、耐熱性を有する複数の導電接続体３０を介在し、各導電接続体３０に、操作スイッチ２０に光線を透過させる光線透過部３５を設けるようにしている。   Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. A capacitive input device according to the present embodiment is a large-sized electromagnetic cooker 1 as shown in FIGS. 1, 2, and 7. A circuit board 10 incorporated in the housing 2 and an operation switch 20 stacked on the top plate 3 of the housing 2 and operated to touch a finger 50 which is a conductive operation body. A device for detecting a change in electric capacity, and a plurality of conductive connecting members 30 having heat resistance are interposed in a gap between a plurality of electrodes 11 formed on the circuit board 10 and the transparent top plate 3, and each conductive connecting member 30 is provided with a light transmission part 35 that transmits light to the operation switch 20.

電磁調理器１の筺体２は、その上部に平坦な絶縁性のトッププレート３が装着され、このトッププレート３の表面左右方向に複数の加熱搭載領域４が所定の間隔で並べて配列形成されており、各加熱搭載領域４が平面円形に区画形成されて所定の金属からなる鍋等の調理器具を搭載する。筺体２の内部には従来例同様、コイル、インバータ回路、及び制御手段がそれぞれ内蔵される。また、各加熱搭載領域４は、調理時に高温になるので、使用者に注意を促す観点から、必要に応じ、操作スイッチ２０のタッチ操作に連動して点灯したり、点滅するよう構成される。   The casing 2 of the electromagnetic cooker 1 has a flat insulating top plate 3 mounted on the top thereof, and a plurality of heating mounting regions 4 are arranged in a row at a predetermined interval on the surface of the top plate 3 in the lateral direction. Each heating mounting region 4 is sectioned and formed in a plane circle, and a cooking utensil such as a pan made of a predetermined metal is mounted. As in the conventional example, the casing 2 contains a coil, an inverter circuit, and control means. Moreover, since each heating mounting area | region 4 becomes high temperature at the time of cooking, from a viewpoint of calling a user's attention, it is comprised so that it may be lighted in connection with the touch operation of the operation switch 20, or may blink as needed.

トッププレート３は、耐久性、耐熱性、誘電特性、絶縁性、光透過性を確保し、かつ磁束透過プレートとして機能する観点から、厚さ３〜５ｍｍの強化ガラス、具体的には温度変化に伴う膨張や収縮量がきわめて小さい耐熱低膨張結晶化ガラス等が利用され、下方の回路基板１０に熱による悪影響を及ぼさないよう断熱用の隙間をおいて上方から対向する。このトッププレート３の筺体２正面寄りの前部表面の左右方向には、静電容量型入力装置が液晶表示部等と共に配設される。   The top plate 3 is a tempered glass having a thickness of 3 to 5 mm, specifically a temperature change, from the viewpoint of ensuring durability, heat resistance, dielectric properties, insulation, light transmission and functioning as a magnetic flux transmission plate. A heat-resistant and low-expansion crystallized glass or the like with a very small amount of expansion or contraction is used, and it is opposed from above with a gap for heat insulation so as not to adversely affect the lower circuit board 10 due to heat. In the left-right direction of the front surface of the top plate 3 near the front surface of the housing 2, a capacitive input device is disposed together with a liquid crystal display unit and the like.

回路基板１０は、例えばプリント配線基板からなり、トッププレート３の裏面に対向する表面に複数の電極１１がＩＴＯ、カーボンペースト、銀ペーストを用いてスクリーン印刷等で配列形成されており、各電極１１が指５０の大きさに配慮した平面枠形の薄膜に形成されてその中央が平面矩形の中空部１２を区画形成する。回路基板１０は、指５０のタッチ操作時の静電容量を適正に変化させ、上方のトッププレート３からの熱伝導を防ぐ観点から、トッププレート３との間に４〜６ｍｍ、好ましくは４．５〜５．５ｍｍ、より好ましくは５ｍｍ前後の隙間を区画形成する。   The circuit board 10 is made of, for example, a printed wiring board, and a plurality of electrodes 11 are arranged on the surface facing the back surface of the top plate 3 by screen printing or the like using ITO, carbon paste, or silver paste. Is formed in a flat frame-shaped thin film in consideration of the size of the finger 50, and the center of the thin film defines a flat rectangular hollow portion 12. From the viewpoint of appropriately changing the capacitance when the finger 50 is touched and preventing heat conduction from the upper top plate 3, the circuit board 10 is 4 to 6 mm, preferably 4. A gap of about 5 to 5.5 mm, more preferably about 5 mm is formed.

回路基板１０には、各電極１１の中空部１２内に位置する複数の光源１３、例えば単色発光あるいは二色発光するＬＥＤが装着され、各光源１３が操作スイッチ２０に連動して点灯し、操作スイッチ２０方向に矢印で示す光線を照射するよう機能する。また、各電極１１の周縁部には、例えば細長い線条の導電ラインが電気的に接続され、この導電ラインが静電容量の変化を電圧に変換する変換回路に電気コネクタを介し電気的に接続される。   A plurality of light sources 13 located in the hollow portion 12 of each electrode 11, for example, LEDs that emit monochromatic light or two-color light, are mounted on the circuit board 10, and each light source 13 is lit in conjunction with the operation switch 20 and operated. It functions to irradiate a light beam indicated by an arrow in the direction of the switch 20. In addition, for example, an elongated conductive line is electrically connected to the peripheral portion of each electrode 11, and this conductive line is electrically connected to a conversion circuit that converts a change in capacitance into a voltage via an electrical connector. Is done.

操作スイッチ２０は、例えばトッププレート３の前部表面に形成されて所定の加熱搭載領域４に対応する操作パネル２１と、この操作パネル２１に一体的に配列形成される複数のスイッチ部２２を備える。これら操作パネル２１と複数のスイッチ部２２とは、金属、顔料、染料等が蒸着、印刷、塗装、転写されることにより、加飾層に形成される。   The operation switch 20 includes, for example, an operation panel 21 formed on the front surface of the top plate 3 and corresponding to a predetermined heating mounting area 4, and a plurality of switch portions 22 that are integrally formed on the operation panel 21. . The operation panel 21 and the plurality of switch units 22 are formed in the decorative layer by depositing, printing, painting, or transferring metal, pigment, dye, or the like.

各スイッチ部２２は、指５０の大きさに配慮した平面矩形に形成され、表面やその周縁部付近に、電磁調理器１の諸機能（例えば、電源切／入、メニュー、時間、分、＋、−、三角記号等）を示す意匠が施されており、裏面に電磁調理器１の機能に対応する電極１１と光源１３とがトッププレート３を介して対向する。   Each switch part 22 is formed in a plane rectangle in consideration of the size of the finger 50, and various functions of the electromagnetic cooking device 1 (for example, power off / on, menu, time, minute, + ,-, Triangular symbols, etc.) are applied, and the electrode 11 and the light source 13 corresponding to the function of the electromagnetic cooking device 1 are opposed to each other with the top plate 3 on the back surface.

複数の導電接続体３０は、回路基板１０の複数の電極１１にそれぞれ対向して接続され、光源１３を包囲しており、黒色に形成されて遮光機能を発揮することにより、光源１３から隣接する操作スイッチ２０に対して光線が漏洩するのを有効に防止する。各導電接続体３０は、所定の耐熱性を有する弾性の導電ゴム３１からなり、下部が平坦な電極対向部３２に形成されて回路基板１０の電極１１に導電接着剤等で対向接着されており、上部が平坦なプレート対向部３３に形成されてトッププレート３の裏面に下方から対向圧接するとともに、操作スイッチ２０のスイッチ部２２に対向する。   The plurality of conductive connecting members 30 are connected to the plurality of electrodes 11 of the circuit board 10 so as to face each other, surround the light source 13, and are formed in black and exhibit a light shielding function, thereby being adjacent to the light source 13. It effectively prevents light from leaking to the operation switch 20. Each conductive connector 30 is made of an elastic conductive rubber 31 having a predetermined heat resistance, and is formed in an electrode facing portion 32 having a flat lower portion and is oppositely bonded to the electrode 11 of the circuit board 10 with a conductive adhesive or the like. The upper portion is formed in a flat plate facing portion 33 so as to be pressed against the back surface of the top plate 3 from below and opposed to the switch portion 22 of the operation switch 20.

導電接続体３０の材質としては、使用時の温度上昇に対して十分な耐熱性を有する材料であれば、特に限定されるものではないが、少なくとも最も高温の調理、例えば天ぷら料理を考慮し、１８０℃以上、好ましくは２２０℃以上、より好ましくは２２５℃以上の耐熱性を有する圧縮変形可能な導電性のシリコーンゴム、エチレンプロピレンジエンゴム（ＥＰＤＭ）、フッ素ゴム等があげられる。これらの中でも、耐熱性、難燃性、弾性特性、圧縮永久歪み特性等に優れる導電性のシリコーンゴムの採用が最適である。導電性のシリコーンゴムとしては、例えば安価なカーボンブラック、導電性亜鉛等の金属粒子が配合されたタイプ、絶縁性のシリコーンゴムの表面がメッキ処理されたタイプ等があげられる。   The material of the conductive connector 30 is not particularly limited as long as the material has sufficient heat resistance against temperature rise during use, but at least the highest temperature cooking, for example, tempura cooking, Examples thereof include conductive silicone rubber, ethylene propylene diene rubber (EPDM), fluorine rubber, etc. having heat resistance of 180 ° C. or higher, preferably 220 ° C. or higher, more preferably 225 ° C. or higher. Among these, it is optimal to use conductive silicone rubber having excellent heat resistance, flame retardancy, elastic characteristics, compression set characteristics, and the like. Examples of the conductive silicone rubber include a type in which metal particles such as inexpensive carbon black and conductive zinc are blended, and a type in which the surface of the insulating silicone rubber is plated.

導電接続体３０は、回路基板１０とトッププレート３との隙間に対応するため、電極対向部３２からプレート対向部３３までの高さが４〜６ｍｍ、好ましくは４．５〜５．５ｍｍ、より好ましくは５ｍｍ前後の角柱形に形成される（図２参照）。この導電接続体３０の大きさは、電極１１やスイッチ部２２同様、指５０の大きさに配慮して決定される。   Since the conductive connection body 30 corresponds to the gap between the circuit board 10 and the top plate 3, the height from the electrode facing portion 32 to the plate facing portion 33 is 4 to 6 mm, preferably 4.5 to 5.5 mm. Preferably, it is formed in a prismatic shape of about 5 mm (see FIG. 2). The size of the conductive connection body 30 is determined in consideration of the size of the finger 50 like the electrode 11 and the switch unit 22.

導電接続体３０の電極対向部３２とプレート対向部３３の端面には、接続や位置決めを容易にする複数の目印や突部が必要に応じて形成される。プレート対向部３３に目印や突部を形成することができない場合には、トッププレート３の裏面にプレート対向部３３用の嵌合位置決め部が適宜形成される。また、導電接続体３０の中央部厚さ方向には、電極１１の中空部１２に連通する丸い連通孔３４が貫通して穿孔され、この連通孔３４が回路基板１０の光源１３からトッププレート３方向に光線を透過させる光線透過部３５として機能する。   A plurality of marks and protrusions that facilitate connection and positioning are formed on the end faces of the electrode facing portion 32 and the plate facing portion 33 of the conductive connector 30 as necessary. When a mark or protrusion cannot be formed on the plate facing portion 33, a fitting positioning portion for the plate facing portion 33 is appropriately formed on the back surface of the top plate 3. Further, in the thickness direction of the central portion of the conductive connection body 30, a round communication hole 34 communicating with the hollow portion 12 of the electrode 11 is penetrated and drilled, and the communication hole 34 extends from the light source 13 of the circuit board 10 to the top plate 3. It functions as a light transmission part 35 that transmits light in the direction.

導電接続体３０のＪＩＳ Ｋ６２５３に基づくショアＡ硬度は、Ａ２０〜Ａ８０、好ましくはＡ６０〜Ａ８０、より好ましくはＡ６０〜Ａ７５に調整される。これは、導電接続体３０のショアＡ硬度がＡ２０〜Ａ８０の範囲、特にＡ６０〜Ａ７５の範囲であれば、導電接続体３０の過剰な圧縮変形に伴う誤操作を防止することができるからである。また、絶縁性のシリコーンゴムにカーボンブラックや金属粒子を配合しても、良好な導電性を確保することができるからである。   The Shore A hardness based on JIS K6253 of the conductive connector 30 is adjusted to A20 to A80, preferably A60 to A80, more preferably A60 to A75. This is because if the Shore A hardness of the conductive connector 30 is in the range of A20 to A80, particularly in the range of A60 to A75, it is possible to prevent an erroneous operation associated with excessive compression deformation of the conductive connector 30. Further, even if carbon black or metal particles are blended with insulating silicone rubber, good conductivity can be ensured.

導電接続体３０のＪＩＳ Ｋ６９１１に準拠して測定する体積抵抗値は、特に限定されるものではないが、導電ゴム３１がカーボン系シリコーンゴムの場合、シリコーンゴムの特性を維持する観点から、５×１０−３〜６×１０−２Ω・ｍ、好ましくは５×１０−３〜５．５×１０−２Ω・ｍ、より好ましくは１×１０−２〜５×１０−２Ω・ｍが最適である。また、導電ゴム３１がカーボン系ではなく、金属微粒子や金属被覆樹脂微粒子を配合するタイプの場合、５×１０−９〜１×１０−６Ω・ｍ、好ましくは１×１０−８〜５×１０−５Ω・ｍ、より好ましくは１×１０−８〜１×１０−５Ω・ｍが最適である。 The volume resistance value measured according to JIS K6911 of the conductive connector 30 is not particularly limited. However, when the conductive rubber 31 is a carbon-based silicone rubber, it is 5 × from the viewpoint of maintaining the characteristics of the silicone rubber. 10 −3 to 6 × 10 −2 Ω · m, preferably 5 × 10 −3 to 5.5 × 10 −2 Ω · m, more preferably 1 × 10 −2 to 5 × 10 −2 Ω · m. Is optimal. Further, when the conductive rubber 31 is not a carbon type and is a type in which metal fine particles or metal-coated resin fine particles are blended, 5 × 10 −9 to 1 × 10 −6 Ω · m, preferably 1 × 10 −8 to 5 × 10 −5 Ω · m, more preferably 1 × 10 −8 to 1 × 10 −5 Ω · m is optimal.

上記構成において、所定の加熱搭載領域４に搭載した調理器具を加熱するため、操作スイッチ２０のスイッチ部２２を指５０でタッチ操作すると、電極１１と指５０との間にトッププレート３を挟むキャパシタが形成されて静電容量が変化し、電極１１がＯＮ状態となり、電磁調理器１が作動してコイルに高周波電流が流れる。   In the above configuration, a capacitor that sandwiches the top plate 3 between the electrode 11 and the finger 50 when the switch unit 22 of the operation switch 20 is touched with the finger 50 in order to heat the cooking utensil mounted in the predetermined heating mounting region 4. Is formed, the capacitance is changed, the electrode 11 is turned on, the electromagnetic cooker 1 is activated, and a high-frequency current flows through the coil.

この際、スイッチ部２２を指５０でタッチ操作し、導電接続体３０の内外周面が幅方向に過剰に膨張すると、指５０と隣接するスイッチ部２２用の電極１１や導電接続体３０との間にキャパシタが形成され、静電容量が誤って変化するおそれがある。しかしながら、導電接続体３０のショアＡ硬度がＡ６０〜Ａ７５の範囲内であれば、導電接続体３０が過剰に膨張することがないので、静電容量の誤った変化を有効に防止することができる。また、導電接続体３０が適切な範囲で変形するので、導電接続体３０の光線透過部３５が潰れることもない。   At this time, when the switch unit 22 is touched with the finger 50 and the inner and outer peripheral surfaces of the conductive connector 30 are excessively expanded in the width direction, the electrode 11 for the switch unit 22 adjacent to the finger 50 and the conductive connector 30 are connected. Capacitors may be formed between them, and the capacitance may change accidentally. However, if the Shore A hardness of the conductive connection body 30 is within the range of A60 to A75, the conductive connection body 30 will not be excessively expanded, so that an erroneous change in capacitance can be effectively prevented. . In addition, since the conductive connector 30 is deformed within an appropriate range, the light transmission part 35 of the conductive connector 30 is not crushed.

電極１１がＯＮ状態になり、電磁調理器１が作動すると、電極１１内の光源１３が点灯して光線を照射し、光線が導電接続体３０の光線透過部３５とトッププレート３とを順次通過して操作スイッチ２０の操作されたスイッチ部２２を照光し、このスイッチ部２２の照光に伴い、使用者の注意が視覚的に喚起される。   When the electrode 11 is turned on and the electromagnetic cooker 1 is activated, the light source 13 in the electrode 11 is turned on to emit light, and the light passes through the light transmitting part 35 and the top plate 3 of the conductive connector 30 in sequence. Then, the switch unit 22 operated by the operation switch 20 is illuminated, and the user's attention is visually evoked along with the illumination of the switch unit 22.

コイルに高周波電流が流れると、このコイルを取り巻くように磁力線が発生するとともに、この磁力線の発生により、調理器具の底部に渦電流が流れ、従来例と同様にジュール熱が発生し、調理器具の底部が加熱されることにより、調理が可能になる。この調理の際、放熱性に劣るトッププレート３ではなく、トッププレート３に対向する回路基板１０に電極１１が印刷形成されるので、例えトッププレート３の加熱搭載領域４から操作スイッチ２０付近に高温の調理器具がずれてその底部が位置しても、電極１１が熱劣化してクラックが発生し、電極１１の剥離を招くおそれがない。   When a high-frequency current flows through the coil, magnetic field lines are generated so as to surround the coil, and due to the generation of the magnetic field lines, eddy currents flow to the bottom of the cooking utensil, generating Joule heat as in the conventional example, Cooking is enabled by heating the bottom. In this cooking, the electrode 11 is printed on the circuit board 10 facing the top plate 3 instead of the top plate 3 having poor heat dissipation. Even if the cooking utensil is displaced and its bottom portion is located, the electrode 11 is thermally deteriorated, cracks are generated, and there is no possibility of causing peeling of the electrode 11.

上記構成によれば、トッププレート３から離れた回路基板１０に電極１１が形成されるので、導通に支障を来すおそれを有効に排除し、指５０のタッチ操作による入力作業を確実に実施することができる。また、光源１３の点灯により、使用者の注意を視覚的に喚起することができるので、使用者がその場から離れたり、誤操作するのを防ぎ、しかも、薄暗い環境での操作が容易となる。したがって、電磁調理器１の安全性、操作性、意匠性をより向上させることができる。   According to the above configuration, since the electrode 11 is formed on the circuit board 10 away from the top plate 3, it is possible to effectively eliminate the possibility of hindering conduction and to reliably perform the input operation by the finger 50 touch operation. be able to. In addition, since the user's attention can be visually evoked by turning on the light source 13, the user is prevented from leaving the site or performing an erroneous operation, and the operation in a dim environment is facilitated. Therefore, the safety | security, operativity, and designability of the electromagnetic cooker 1 can be improved more.

また、回路基板１０の光源１３とトッププレート３との間に従来の板バネ１４等が介在せず、光線の照射が阻害されることがないので、スイッチ部２２の照光に何ら悪影響を及ぼすことがない。また、導電接続体３０が１８０℃以上、好ましくは２２０℃以上の耐熱性を有するので、例え電磁調理器１のトッププレート３が高温になっても、長期に亘って連続使用することが可能になる。   In addition, since the conventional leaf spring 14 or the like is not interposed between the light source 13 and the top plate 3 of the circuit board 10 and the irradiation of light rays is not hindered, the illumination of the switch unit 22 is adversely affected. There is no. Further, since the conductive connector 30 has a heat resistance of 180 ° C. or higher, preferably 220 ° C. or higher, even if the top plate 3 of the electromagnetic cooking device 1 becomes high temperature, it can be used continuously for a long time. Become.

また、例えトッププレート３に沈降や変形が生じ、トッププレート３と回路基板１０の電極１１との距離が多少変化しても、導電接続体３０が追従して変形し、トッププレート３と導電接続体３０との間に空気層が介在することがないので、安定した感度を得ることができる。また、導電接続体３０が弾性の導電ゴム３１なので、操作時の振動を吸収し、騒音を防ぐことも可能となる。さらに、導電接続体３０が簡易な構成なので、製造の容易化を実現し、量産性を向上させることも可能となる。   In addition, even if the top plate 3 is settled or deformed, and the distance between the top plate 3 and the electrode 11 of the circuit board 10 is slightly changed, the conductive connector 30 is deformed following the top plate 3 and is electrically connected to the top plate 3. Since there is no air layer between the body 30 and the body 30, stable sensitivity can be obtained. Further, since the conductive connecting member 30 is an elastic conductive rubber 31, it is possible to absorb vibration during operation and prevent noise. Furthermore, since the conductive connector 30 has a simple configuration, it is possible to facilitate the manufacture and improve the mass productivity.

次に、図３は本発明の第２の実施形態を示すもので、この場合には、回路基板１０の各電極１１を平面枠形の薄膜に形成してその中央に中空部１２を区画形成し、各導電接続体３０を角柱形の導電ゴム３１とし、この導電ゴム３１の中央部に、電極１１の中空部１２に連通する連通孔３４を穿孔するとともに、この連通孔３４に光透過性のエラストマー３６を充填して硬化させ、この光透過性のエラストマー３６を光源１３用の光線透過部３５とするようにしている。   Next, FIG. 3 shows a second embodiment of the present invention. In this case, each electrode 11 of the circuit board 10 is formed in a flat frame-shaped thin film, and a hollow portion 12 is formed in the center thereof. Each conductive connector 30 is a prismatic conductive rubber 31, and a communication hole 34 communicating with the hollow portion 12 of the electrode 11 is drilled in the central portion of the conductive rubber 31. The light-transmitting elastomer 36 is used as a light-transmitting portion 35 for the light source 13.

光透過性のエラストマー３６としては、特に限定されるものではないが、スイッチ部２２の照光性を確保する観点から、例えば透明のＥＰＤＭやフッ素ゴム等があげられる。その他の部分については、上記実施形態と同様であるので説明を省略する。   The light-transmitting elastomer 36 is not particularly limited, and examples thereof include transparent EPDM and fluororubber from the viewpoint of ensuring the illumination of the switch unit 22. The other parts are the same as those in the above embodiment, and the description thereof is omitted.

本実施形態においても上記実施形態と同様の作用効果が期待でき、しかも、導電ゴム３１の連通孔３４内を空気層とするのではなく、光透過性のエラストマー３６を設けるので、誘電率を向上させ、指５０のタッチ操作時の静電容量を増大させることができるのは明らかである。また、光透過性のエラストマー３６により光源１３を保護したり、導電接続体３０の構成の多様化を図ることもできる。   Also in this embodiment, the same effect as the above embodiment can be expected, and the dielectric constant is improved because the inside of the communication hole 34 of the conductive rubber 31 is not an air layer but a light-transmitting elastomer 36 is provided. Obviously, the capacitance at the time of the touch operation of the finger 50 can be increased. Further, the light source 13 can be protected by the light-transmitting elastomer 36 and the configuration of the conductive connection body 30 can be diversified.

次に、図４は本発明の第３の実施形態を示すもので、この場合には、回路基板１０の各電極１１を平面枠形の薄膜としてその中央に平面矩形の中空部１２を区画形成し、各導電接続体３０を、弾性を有する導電ゴム３１と光透過性の絶縁ゴム３７とが交互に並んで積層接着された電気コネクタ３８とし、この電気コネクタ３８の絶縁ゴム３７の少なくとも一部を電極１１の中空部１２に対向させて光源１３用の光線透過部３５とするようにしている。   Next, FIG. 4 shows a third embodiment of the present invention. In this case, each electrode 11 of the circuit board 10 is a flat frame-shaped thin film, and a flat rectangular hollow portion 12 is formed in the center of the thin film. Each conductive connector 30 is an electrical connector 38 in which conductive rubber 31 having elasticity and light-transmissive insulating rubber 37 are alternately laminated and bonded, and at least a part of the insulating rubber 37 of the electrical connector 38 is used. Is made to be opposed to the hollow portion 12 of the electrode 11 to form a light transmitting portion 35 for the light source 13.

電気コネクタ３８の複数の導電ゴム３１と絶縁ゴム３７とは、共に薄い板形やブロック形に成形され、導電ゴム３１と絶縁ゴム３７の硬度が異なるよう調整される。例えば、導電ゴム３１のショアＡ硬度がＡ６３〜６７の場合、絶縁ゴム３７のショアＡ硬度はＡ６５〜７３等に設定される。   The plurality of conductive rubbers 31 and the insulating rubber 37 of the electrical connector 38 are both formed into a thin plate shape or block shape, and are adjusted so that the hardnesses of the conductive rubber 31 and the insulating rubber 37 are different. For example, when the Shore A hardness of the conductive rubber 31 is A63 to 67, the Shore A hardness of the insulating rubber 37 is set to A65 to 73 or the like.

導電ゴム３１は、例えばカーボンブラック、導電性亜鉛、金、銀、真鍮、チタン、ニッケル、ベリリウム銅、パラジウム等が配合されたシリコーンゴムタイプが使用され、下部が平坦な電極対向部３２として回路基板１０の電極１１に接着されており、上部が平坦なプレート対向部３３としてトッププレート３の裏面に密接するとともに、操作スイッチ２０のスイッチ部２２に対向する。また、絶縁ゴム３７は、例えば誘電率が低く、光線透過率７０％以上の透明のシリコーンゴムが使用されたり、半透明のシリコーンゴムが用いられる。その他の部分については、上記実施形態と同様であるので説明を省略する。   As the conductive rubber 31, for example, a silicone rubber type in which carbon black, conductive zinc, gold, silver, brass, titanium, nickel, beryllium copper, palladium, or the like is blended is used, and a circuit board is used as an electrode facing portion 32 with a flat bottom. 10 is adhered to the electrode 11, and is in close contact with the back surface of the top plate 3 as a flat plate facing portion 33 at the top, and is opposed to the switch portion 22 of the operation switch 20. The insulating rubber 37 is made of, for example, a transparent silicone rubber having a low dielectric constant and a light transmittance of 70% or more, or a translucent silicone rubber. The other parts are the same as those in the above embodiment, and the description thereof is omitted.

本実施形態においても上記実施形態と同様の作用効果が期待でき、しかも、導電接続体３０を、矩形の導電ゴム３１と絶縁ゴム３７とが横方向に交互に並んだ電気コネクタ３８とし、面接触の範囲を拡大するので、接続が安定して接続不良になりにくいのは明らかである。また、回路基板１０の電極１１とトッププレート３とのランダム接続も可能になる。   In this embodiment, the same effect as that of the above embodiment can be expected, and the conductive connector 30 is an electric connector 38 in which rectangular conductive rubber 31 and insulating rubber 37 are alternately arranged in the lateral direction, and surface contact is made. It is clear that the connection is stable and is unlikely to cause a connection failure. Further, random connection between the electrode 11 of the circuit board 10 and the top plate 3 is also possible.

次に、図５は本発明の第４の実施形態を示すもので、この場合、各導電接続体３０は、回路基板１０の電極１１とトッププレート３との隙間に介在する角柱形の絶縁ゴム３７を備え、この絶縁ゴム３７の中央部に、電極１１の中空部１２に連通する連通孔３４を穿孔するとともに、この連通孔３４を光源１３用の光線透過部３５とし、絶縁ゴム３７の中央部以外の箇所には、上下厚さ方向に伸びる複数本の導電ワイヤ３９を埋設するようにしている。   Next, FIG. 5 shows a fourth embodiment of the present invention. In this case, each conductive connector 30 is a prismatic insulating rubber interposed in the gap between the electrode 11 of the circuit board 10 and the top plate 3. 37, a communication hole 34 communicating with the hollow portion 12 of the electrode 11 is drilled in the central portion of the insulating rubber 37, and the communication hole 34 is used as a light transmissive portion 35 for the light source 13. A plurality of conductive wires 39 extending in the vertical thickness direction are embedded in places other than the portions.

絶縁ゴム３７としては、特に制約されるものではないが、例えば硬度の低い（例えば、ショアＡ硬度Ａ２０〜Ａ５０、好ましくはＡ２０〜Ａ４０等）シリコーンゴムスポンジやシリコーンゴム等があげられる。また、各導電ワイヤ３９は、例えばＣｕ、Ａｕ、Ｎｉ、Ａｇ、Ｔｉ、Ｐｄ、Ｗ製の屈曲可能な極細線が使用され、上下両端部が絶縁ゴム３７の上下両端面からそれぞれ露出しており、下端部が電極対向部３２として回路基板１０の電極１１に接続されるとともに、上端部がプレート対向部３３としてトッププレート３に接触する。この導電ワイヤ３９は、必要に応じ、屈曲したり、絶縁ゴム３７の内外方向に傾斜して埋設される。その他の部分については、上記実施形態と同様であるので説明を省略する。   The insulating rubber 37 is not particularly limited, and examples thereof include silicone rubber sponge and silicone rubber having low hardness (for example, Shore A hardness A20 to A50, preferably A20 to A40). Each conductive wire 39 is made of, for example, a bendable fine wire made of Cu, Au, Ni, Ag, Ti, Pd, or W, and its upper and lower ends are exposed from the upper and lower ends of the insulating rubber 37, respectively. The lower end portion is connected to the electrode 11 of the circuit board 10 as the electrode facing portion 32, and the upper end portion is in contact with the top plate 3 as the plate facing portion 33. The conductive wire 39 is bent or embedded so as to incline in and out of the insulating rubber 37 as necessary. The other parts are the same as those in the above embodiment, and the description thereof is omitted.

本実施形態においても上記実施形態と同様の作用効果が期待でき、しかも、比較的小さな力で電極１１とトッププレート３とを接続することができる。また、導電ワイヤ３９として金属細線を使用すれば、低抵抗の安定した接続を実現することができる。さらに、導電ワイヤ３９を屈曲させたり、あるいは傾斜させれば、導電ワイヤ３９の座屈等を抑制防止し、長期に亘って繰り返し使用することが可能になる。   In this embodiment, the same effect as that of the above embodiment can be expected, and the electrode 11 and the top plate 3 can be connected with a relatively small force. Further, if a thin metal wire is used as the conductive wire 39, a stable connection with low resistance can be realized. Furthermore, if the conductive wire 39 is bent or inclined, buckling or the like of the conductive wire 39 can be suppressed and used repeatedly over a long period of time.

次に、図６は本発明の第５の実施形態を示すもので、この場合には、各導電接続体３０を、回路基板１０の電極１１とトッププレート３との隙間に介在する角柱形の金属ブロック４０とし、この金属ブロック４０の中央部に、電極１１の中空部１２に連通する連通孔３４を穿孔するとともに、この連通孔３４を光源１３用の光線透過部３５とし、金属ブロック４０の上下両端面に、圧縮変形可能な導電ゴム３１をそれぞれ貼着し、これらの導電ゴム３１を電極対向部３２とプレート対向部３３として利用するようにしている。   Next, FIG. 6 shows a fifth embodiment of the present invention. In this case, each conductive connector 30 has a prismatic shape interposed between the electrode 11 of the circuit board 10 and the top plate 3. A metal block 40 is formed, and a communication hole 34 communicating with the hollow portion 12 of the electrode 11 is drilled in the center of the metal block 40, and the communication hole 34 is used as a light transmissive portion 35 for the light source 13. A conductive rubber 31 that can be compressed and deformed is attached to both upper and lower end faces, and these conductive rubbers 31 are used as the electrode facing portion 32 and the plate facing portion 33.

金属ブロック４０としては、限定されるものではないが、少なくとも１８０℃以上、好ましくは２２０℃以上の耐熱性を有する鉄、銅、銅合金、真鍮、チタン、ニッケル、ベリリウム銅、パラジウム製のブロック等が用いられる。各導電ゴム３１は、少なくとも１８０℃以上の耐熱性を有する導電性のシリコーンゴム、エチレンプロピレンジエンゴム、フッ素ゴム等により、平面枠形や幅狭の柱形等に形成される。その他の部分については、上記実施形態と同様であるので説明を省略する。   The metal block 40 is not limited, but is a block made of iron, copper, copper alloy, brass, titanium, nickel, beryllium copper, palladium having heat resistance of at least 180 ° C. or more, preferably 220 ° C. or more. Is used. Each conductive rubber 31 is formed into a flat frame shape, a narrow column shape, or the like by using conductive silicone rubber having heat resistance of at least 180 ° C., ethylene propylene diene rubber, fluorine rubber, or the like. The other parts are the same as those in the above embodiment, and the description thereof is omitted.

本実施形態においても上記実施形態と同様の作用効果が期待でき、しかも、導電接続体３０の全てを導電ゴム３１とすることができない場合に、導電接続体３０の構成を容易に変更することができる。   Also in this embodiment, the same effect as the above-described embodiment can be expected, and the configuration of the conductive connector 30 can be easily changed when not all of the conductive connector 30 can be the conductive rubber 31. it can.

なお、上記実施形態ではトッププレート３のフラットな前部表面に静電容量型入力装置の操作スイッチ２０を配設したが、トッププレート３の前部を下方に傾斜させ、この傾斜した前部表面に静電容量型入力装置を配設しても良い。また、必要に応じ、トッププレート３の後部や側部に操作スイッチ２０を設けても良い。また、操作スイッチ２０の操作パネル２１と複数のスイッチ部２２とを、ポリカーボネート、ポリアセタール、ポリブチレンテレフタレート、ＡＢＳ樹脂、ポリプロピレン、アクリル樹脂製の薄いシートにより一体成形しても良い。   In the above embodiment, the operation switch 20 of the capacitive input device is disposed on the flat front surface of the top plate 3, but the front portion of the top plate 3 is inclined downward, and the inclined front surface is inclined. An electrostatic capacitance type input device may be provided in the case. Moreover, you may provide the operation switch 20 in the rear part or side part of the top plate 3 as needed. Further, the operation panel 21 and the plurality of switch portions 22 of the operation switch 20 may be integrally formed with a thin sheet made of polycarbonate, polyacetal, polybutylene terephthalate, ABS resin, polypropylene, or acrylic resin.

また、トッププレート３の裏面に光拡散性のシリコーンゴムやフィルム等の光拡散部材を積層して導電接続体３０に対向させ、光源１３からの光線を拡散させても良い。また、光源１３を光拡散性のキャップ等からなる光拡散部材により被覆し、光源１３からの光線を拡散させることができる。また、スイッチ部２２のタッチ操作時に光源１３を点滅させ、操作スイッチ２０方向に光線を照射することができる。また、回路基板１０に、電極１１の中空部１２と導電接続体３０の光線透過部３５とに連通する貫通孔を穿孔し、この貫通孔の下方に光源１３を配置することができる。   Alternatively, a light diffusing member such as a light diffusing silicone rubber or a film may be laminated on the back surface of the top plate 3 so as to face the conductive connector 30, and the light from the light source 13 may be diffused. Further, the light source 13 can be covered with a light diffusing member made of a light diffusing cap or the like to diffuse the light from the light source 13. Moreover, the light source 13 can be blinked at the time of touch operation of the switch part 22, and a light beam can be irradiated to the operation switch 20 direction. Further, a through hole communicating with the hollow portion 12 of the electrode 11 and the light transmitting portion 35 of the conductive connector 30 can be drilled in the circuit board 10, and the light source 13 can be disposed below the through hole.

また、導電接続体３０をカーボンブラック等の導電フィラーにより黒色として遮光機能を確保したが、導電接続体３０に光線を反射する白色を着色し、遮光機能を確保することもできる。また、導電接続体３０は、多角形の柱形の他、円筒形等に形成することが可能である。また、回路基板１０の電極１１に導電接続体３０の電極対向部３２を導電接着剤で接着したが、回路基板１０の電極１１に導電接続体３０の電極対向部３２を導電粘着テープで粘着しても良いし、回路基板１０の電極１１に導電接続体３０の電極対向部３２の一部分を接続することも可能である。   Further, although the conductive connecting member 30 is black with a conductive filler such as carbon black and the light blocking function is secured, the conductive connecting member 30 can be colored white to reflect light to secure the light blocking function. The conductive connector 30 can be formed in a cylindrical shape in addition to a polygonal column shape. In addition, the electrode facing portion 32 of the conductive connection body 30 is adhered to the electrode 11 of the circuit board 10 with a conductive adhesive, but the electrode facing portion 32 of the conductive connection body 30 is adhered to the electrode 11 of the circuit board 10 with a conductive adhesive tape. Alternatively, it is possible to connect a part of the electrode facing portion 32 of the conductive connector 30 to the electrode 11 of the circuit board 10.

さらに、静電容量型入力装置の組立作業を容易にするため、トッププレート３の裏面に導電接続体３０のプレート対向部３３を押し付けて密接させても良いが、プレート対向部３３を導電接着剤や導電粘着テープ等で接続することも可能である。   Further, in order to facilitate the assembly operation of the capacitance type input device, the plate facing portion 33 of the conductive connector 30 may be pressed and brought into close contact with the back surface of the top plate 3. It is also possible to connect with a conductive adhesive tape or the like.

本発明に係る静電容量型入力装置は、電磁調理器、ガスコンロ、ホットプレート等からなる家電製品等の製造分野で使用される。   The capacitance-type input device according to the present invention is used in the field of manufacturing home appliances such as an electromagnetic cooker, a gas stove, and a hot plate.

１ 電磁調理器（加熱機器）
２ 筺体
３ トッププレート（プレート）
１０ 回路基板
１１ 電極
１２ 中空部
１３ 光源
２０ 操作スイッチ
２１ 操作パネル
２２ スイッチ部
３０ 導電接続体
３１ 導電ゴム
３２ 電極対向部
３３ プレート対向部
３４ 連通孔
３５ 光線透過部
３６ エラストマー
３７ 絶縁ゴム
３８ 電気コネクタ
３９ 導電ワイヤ
４０ 金属ブロック
５０ 指（操作体） 1 Electromagnetic cooker (heating equipment)
2 Housing 3 Top plate (plate)
DESCRIPTION OF SYMBOLS 10 Circuit board 11 Electrode 12 Hollow part 13 Light source 20 Operation switch 21 Operation panel 22 Switch part 30 Conductive connection body 31 Conductive rubber 32 Electrode facing part 33 Plate facing part 34 Communication hole 35 Light transmission part 36 Elastomer 37 Insulating rubber 38 Electrical connector 39 Conductive wire 40 Metal block 50 Finger (operation body)

Claims (5)

加熱機器に内蔵される回路基板と、加熱機器の筺体のプレートに設けられて操作体に操作される操作スイッチとを備え、回路基板と筺体のプレートとを隙間をおいて対向させた静電容量型入力装置であって、
回路基板のプレートに対向する対向面に電極を形成し、回路基板の電極とプレートとの隙間に、少なくとも１８０℃以上の耐熱性を有する導電接続体を介在し、この導電接続体の少なくとも電極に対向する電極対向部とプレートに対向接触するプレート対向部とに弾性をそれぞれ付与し、導電接続体の電極対向部の少なくとも一部分を回路基板の電極に接続するとともに、導電接続体のプレート対向部を操作スイッチに対向させるようにしたことを特徴とする静電容量型入力装置。 Capacitance provided with a circuit board built in the heating device and an operation switch provided on the casing plate of the heating device and operated by the operating body, with the circuit board and the casing plate facing each other with a gap. A mold input device,
An electrode is formed on the surface facing the plate of the circuit board, and a conductive connector having a heat resistance of at least 180 ° C. is interposed in the gap between the electrode of the circuit board and the plate, and at least the electrode of the conductive connector Elasticity is imparted to the opposing electrode opposing portion and the opposing plate opposing portion to the plate, and at least a part of the electrode opposing portion of the conductive connector is connected to the electrode of the circuit board. A capacitance-type input device characterized by facing an operation switch. プレートに光透過性を付与し、導電接続体に、回路基板方向の光源から操作スイッチ方向に光線を透過させる光線透過部を設けた請求項１記載の静電容量型入力装置。   2. The capacitance-type input device according to claim 1, wherein the plate is provided with a light transmission property, and the conductive connection body is provided with a light transmission part that transmits light in the operation switch direction from the light source in the circuit board direction. 回路基板の電極に中空部を形成し、導電接続体を導電ゴムとし、この導電ゴムに、電極の中空部に連通する連通孔を設け、この導電ゴムの連通孔を光線透過部とした請求項２記載の静電容量型入力装置。   A hollow part is formed in the electrode of the circuit board, the conductive connecting body is made of conductive rubber, a communication hole communicating with the hollow part of the electrode is provided in the conductive rubber, and the communication hole of the conductive rubber is used as a light transmission part. 2. The capacitive input device according to 2. 回路基板の電極に中空部を形成し、導電接続体を導電ゴムとし、この導電ゴムに、電極の中空部に連通する連通孔を設けるとともに、この導電ゴムの連通孔に光透過性のエラストマーを設け、この光透過性のエラストマーを光線透過部とした請求項２記載の静電容量型入力装置。   A hollow part is formed in the electrode of the circuit board, and the conductive connecting member is made of conductive rubber. In this conductive rubber, a communication hole communicating with the hollow part of the electrode is provided, and a light transmissive elastomer is formed in the communication hole of the conductive rubber. The capacitance-type input device according to claim 2, wherein the light-transmitting elastomer is provided as a light-transmitting portion. 回路基板の電極に中空部を形成し、導電接続体を、導電ゴムと光透過性の絶縁ゴムとが交互に並んだ電気コネクタとし、この電気コネクタの絶縁ゴムを電極の中空部に対向させて光線透過部とした請求項２記載の静電容量型入力装置。   A hollow part is formed in the electrode of the circuit board, and the conductive connecting member is an electric connector in which conductive rubber and light-transmissive insulating rubber are alternately arranged, and the insulating rubber of the electric connector is opposed to the hollow part of the electrode. The capacitive input device according to claim 2, wherein the capacitive input device is a light transmission part.
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