JP4289004B2

JP4289004B2 - Switch operating device

Info

Publication number: JP4289004B2
Application number: JP2003121708A
Authority: JP
Inventors: 勝仁梅沢
Original assignee: Nippon Seiki Co Ltd
Current assignee: Nippon Seiki Co Ltd
Priority date: 2003-04-25
Filing date: 2003-04-25
Publication date: 2009-07-01
Anticipated expiration: 2023-04-25
Also published as: JP2004327286A

Description

【０００１】
【発明の属する技術分野】
本発明は、押しボタン式スイッチが配置される回路基板に押しボタン式スイッチを押圧操作する操作部材を装着したスイッチ操作装置に関するものである。
【０００２】
【従来の技術】
例えば車両用の計器装置に用いられるスイッチ操作装置を図６および図７を用いて説明する。図６はスイッチ操作装置の部分断面図であり、図７はスイッチ操作装置における操作部材の装着過程を示す説明図である。図示しないが、計器装置には車両の走行距離（トータルおよびトリップ）や燃費，外気温などを表示する例えば液晶表示素子と、この液晶表示素子の表示を切り替えるスイッチ操作装置を備えている。
【０００３】
スイッチ操作装置は、押しボタン式スイッチ１００と、この押しボタン式スイッチ１００を押圧操作する操作部材１０１を備えており、押しボタン式スイッチ１００は、復帰可能に保持された可動部１０２とハウジング１０３を有し、硬質な回路基板１０４の前面側に配置されて回路基板１０４に半田付されている。操作部材１０１は合成樹脂からなり、操作部１０５と、押しボタン式スイッチ１００の可動部１０２を押圧作動させる押圧部１０６と、操作部１０５の周囲に突き出した円板状の突出部１０７と、この突出部１０７から回路基板１０４側に延び係止爪１０８を有する弾性変形可能な２個の係止片１０９と、押圧部１０６周囲の突出部１０７に設けられた円筒部１１０とを有している。１１１は、円筒部１１０周囲の突出部１０７と回路基板１０４との間に配置され、操作部材１０１を反押圧側（反押しボタン式スイッチ１００側）に反撥付勢させるコイルバネである。
【０００４】
操作部材１０１を回路基板１０４へ装着する際は以下のようにして行う。円筒部１１０にコイルバネ１１１を装着した状態で回路基板１０４に設けてある係止孔１１２に係止片１０９の下端を挿入するようにする。すると、図７に示す様に傾斜面１１３が係止孔１１２の端（角部１１４）に当接する。この状態で更に操作部１０５を下方へ押すと、係止片１０９が矢印方向（押しボタン式スイッチ１００側）に撓みながら下方に移動し、係止爪１０８が係止孔１１２の下端（角部１１４Ａ）を外れた時点で係止片１０９が元の位置に戻り、係止爪１０８が回路基板１０４の裏面側の係止孔１１２端縁に係止されて回路基板１０４に装着される。
【０００５】
押しボタン式スイッチ１００の押圧操作は以下のようにする。操作部１０５を下方へ押すことによって押圧部１０６が下がり可動部１０２を押圧するようになる。この可動部１０２が押圧作動されることによって、前述した様な液晶表示素子の表示が切り替わる（例えば、トータル走行距離とトリップ走行距離の表示切替、あるいはトリップ走行距離のゼロセット）ものである。なお、操作部１０５の下方への押し操作を止めることにより、操作部材１０１はコイルバネ１１１の反撥力で元の位置に戻るよう（係止爪１０８が回路基板１０４の裏面側の係止孔１１２端縁に係止された状態、すなわち図６に示す状態）になっている。
【０００６】
【発明が解決しようとする課題】
しかしながら、回路基板１０４の係止孔１１２に係止片１０９の下端を挿入しようとする際、図７に示す様に傾斜面１１３が係止孔１１２の角部１１４に当接する。この状態で更に操作部１０５を下方へ押そうとするが、傾斜面１１３が角部１１４に引っ掛かった状態となることがある。傾斜面１１３の角度αが４５度位、又はそれ以下であると、係止片１０９が矢印方向へスムーズに撓まない。この点を解消するために、傾斜面１１３の角度αを大きく（例えば６０〜７０度）すれば、係止片１０９は容易に撓み、係止爪１０８が係止孔１１２に入り易くなる。しかし、傾斜面１１３の角度αを大きくする程、係止爪１０８の長さＬが長くなってしまう。すると、例えば回路基板１０４の裏面側を覆う部材がある場合は、回路基板１０４から離さなければならず、計器装置が大きくなってしまう。
【０００７】
また、回路基板１０４に設けてある係止孔１１２に係止片１０９の下端を挿入しようとする際、係止孔１１２が小さいために狙いを定めにくく、挿入性が悪い。つまり、回路基板への操作部材の装着がスムーズに行かないことがある。係止孔１１２を大きくできない理由は、係止孔１１２が大きいと係止爪１０８が係止孔１１２端縁に係止されなかったり、回路基板１０４に対する操作部材１０１の位置が定まりにくいためである。
【０００８】
本発明はこの様な点に鑑みなされたもので、回路基板への操作部材の装着が良好であるスイッチ操作装置を提供することを目的とする。
【０００９】
【課題を解決するための手段】
本発明は前記課題を解決するため、ケースに保持された表示素子と可動部を有する押しボタン式スイッチとが配置される回路基板と、前記可動部を押圧することによって前記表示素子の表示切替を行う操作部材とを備え、前記操作部材に、先端側に係止部を有する弾性変形可能な係止片を設け、この係止片を撓ませながら前記回路基板に設けた孔部に前記係止部を挿入して前記孔部の端縁に前記係止部を係止するようにしたスイッチ操作装置において、少なくとも前記係止部を設けた側の前記孔部周縁の前記回路基板上に、前記孔部の縁に向かって傾斜する傾斜面を有するガイド部を前記ケースと一体に設け、前記ガイド部の内縁を前記孔部の縁と一致させるか、または前記孔部の縁より径小としたものである。
【００１１】
【発明の実施の形態】
本発明のスイッチ操作装置を適用した車両用の計器装置を実施形態として説明する。図１〜図５に本発明の実施形態を示す。図１は速度計１と回転計２を備えた計器装置の正面図である。図２はスイッチ操作装置を含む速度計１の断面図（図１におけるＡ−Ａ断面）である。図３はスイッチ操作装置の正面図（但し、回路基板を除いた状態），図４はスイッチ操作装置の断面図（図３におけるＢ−Ｂ断面）であり、図５は操作部材の装着過程を示す説明図である。なお、図１に於いて速度計１および回転計２の表示部は記載を省略してある。
【００１２】
車両用計器装置は、硬質な回路基板３と、この回路基板３の裏面側に回路基板３と導通状態で装着され、回路基板３を貫通して前方に延びる回動軸４を有する計器本体５と、回動軸４の先端側に固着された指針６と、この指針６の後方に配置され指針６の動作に対応する表示部（図示せず）を施した表示板７と、この表示板７と回路基板３との間に配置され、表示板７を保持する白色の合成樹脂からなる保持部材８と、回路基板３上に実装され指針６や表示板７を背後から照明する光源としての発光ダイオード９，９Ａと、回路基板３の裏面側を覆うカバー１０と、表示板７の前方側に配置され表示板７の可視領域を定める開口部１１を有する覆い部材１２と、指針６や表示板７などの前方側を被う無色透明の透視板１３を備えている。
【００１３】
また、計器装置には車両の走行距離（トータルおよびトリップ）や燃費，外気温，時刻などの情報を表示する情報表示器Ｘと、情報表示器Ｘの表示を切り替えるスイッチ操作装置Ｙを備えている。
【００１４】
情報表示器Ｘは、速度計１内に配置され、前述した各種情報を表示する例えば液晶表示素子１４と、この液晶表示素子１４が保持される合成樹脂製のケース１５と、速度計１や回転計２の計器本体５を駆動させる電子部品（図示せず）や前述した発光ダイオード９，９Ａが実装された回路基板３上に実装され、液晶表示素子１４を背後から照明する光源としての発光ダイオード９Ｂなどを有している。なお、液晶表示素子１４と回路基板３とは、図示しないが導電性の金属端子で繋がれている。また、表示板７には窓部１６が形成され、この窓部１６から液晶表示素子１４の表示が視認されるようになっている。
【００１５】
スイッチ操作装置Ｙは、例えばシリコーンゴムなどのゴム弾性体からなる押しボタン式スイッチ１７と、この押しボタン式スイッチ１７が配置される硬質な回路基板３と、押しボタン式スイッチ１７を押圧操作する合成樹脂製の操作部材１８と、後述するガイド部１９を備えている。回路基板３は速度計１や回転計２の計器本体５や情報表示器Ｘが装着された基板である。
【００１６】
押しボタン式スイッチ１７は、可動部２０およびラッパ状の脚部２１を有しており、可動部２０の回路基板３側には可動接点２２が設けてある。また、可動部２０の中心には貫通孔２３が設けてある。
【００１７】
操作部材１８は、押しボタン式スイッチ１７の可動部２０上に当接し、可動部２０を押圧する円板状の押圧部２４と、透視板１３に形成した穴２５を貫通して外部まで延び、押圧部２４を作動操作するための円柱状の操作軸２６と、押圧部２４の周縁からＬ字状に回路基板３側に延び、先端側に係止部２７を有する弾性変形可能な２個の係止片２８を有している。この係止部２７は回路基板３に設けてある角形の孔部２９の裏面側の端縁に係止される。また、押圧部２４の中心から回路基板３側に延びる軸部３０を有しており、この軸部３０は押しボタン式スイッチ１７の貫通孔２３と回路基板３に設けられた軸孔３１を貫通している。
【００１８】
回路基板３に設けてある孔部２９の周囲には、孔部２９を囲むように合成樹脂からなるガイド部１９が配置されている。本実施形態におけるガイド部１９は、液晶表示素子１４が保持されたケース１５と一体に設けられ、押しボタン式スイッチ１７側を除いた回路基板３上に、孔部２９の縁（角部３２）に向かって傾斜する３箇所の傾斜面３３，３３Ａを有するものである（係止部２７を設けた側を傾斜面３３とする）。ガイド部１９の内縁３４は孔部２９の縁と一致しているか、または孔部２９の縁より径小としてある（内縁３４が孔部２９の中心側に僅かに出ている状態）。回路基板３に設けてある軸孔３１の周囲には固定接点３５が印刷形成してある。
【００１９】
なお、ガイド部１９に傾斜面３３を設けてあるため、係止部２７には傾斜面を必ずしも設ける必要はないが、回路基板３の孔部２９の断面に沿って係止部２７が下方へ移動する際の抵抗を少なくする（接触面積を小さくする）ようにするためにも、本実施形態においては従来例と同等角（４０〜４５度）の傾斜面が係止部２７に設けてある。また、係止部２７側の傾斜面３３の角度βは、従来例における傾斜面１１３の角度αより大きく（５０〜７０度）してある。
【００２０】
操作部材１８を回路基板３へ装着する際は以下のようにして行う。操作部材１８の軸部３０に押しボタン式スイッチ１７の可動部２０を嵌めた状態で係止片２８の下端側を傾斜面３３，３３Ａを有するガイド部１９内に挿入するようにする。すると、図５に示す様に係止部２７が傾斜面３３に当接する。この状態で更に操作軸２６を下方へ押すと、係止片２８が矢印方向（押しボタン式スイッチ１７側）に撓み、係止部２７が傾斜面３３に沿いながら下方に移動し、係止部２７が回路基板３の孔部２９の下端（角部３２Ａ）を外れた時点で係止片２８が元の位置に戻り、係止部２７が回路基板３の裏面側の孔部２９端縁に係止されて回路基板３に装着される。
【００２１】
押しボタン式スイッチ１７の押圧操作は以下のようにする。操作軸２６を下方へ押すことによって押しボタン式スイッチ１７の脚部２１が変形しながら可動部２０が下方へ押し下げられ、可動接点２２が固定接点３５に接することによって電気的な導通がされ、前述した様な液晶表示素子の表示が切り替わる（例えば、トータル走行距離とトリップ走行距離の表示切替、あるいはトリップ走行距離のゼロセット）ものである。なお、操作軸２６の下方への押し操作を止めることにより、可動部２０は脚部２１の弾性力で元の状態に復帰し、可動接点２２が固定接点３５から離れるとともに、操作部材１８も元の位置に戻る。すなわち、図４に示す状態になる。
【００２２】
この様に、可動部２０を有する押しボタン式スイッチ１７が配置される回路基板３と、可動部２０を押圧する操作部材１８とを備え、操作部材１８に、先端側に係止部２７を有する弾性変形可能な係止片２８を設け、この係止片２８を撓ませながら回路基板３に設けた孔部２９に係止部２７を挿入して孔部２９の端縁に係止部２７を係止するようにしたスイッチ操作装置において、係止部２７を設けた側の孔部２９周縁の回路基板３上に、孔部２９の縁（角部３２）に向かって傾斜する傾斜面３３を有するガイド部１９を配置したことにより、係止部２７に傾斜角の大きい傾斜面を設けなくとも、係止片２８が押しボタン式スイッチ１７側へスムーズに撓み、回路基板３への操作部材１８の装着が良好であるとともに、係止部２７の高さＨが低くて済み、他の障害とはならない。
【００２３】
また、係止片２８の挿入側である回路基板３上に配置したガイド部１９に傾斜面３３，３３Ａを設けたことにより、この傾斜面３３，３３Ａが係止部２７（係止片２８）の誘い込みとなって、操作部材１８を回路基板３に装着する際の作業性が良い。なお、ガイド部１９には１個の孔部２９に対して３箇所の傾斜面３３，３３Ａを設けたが、少なくとも係止部２７を設けた側に傾斜面３３が有れば良い。但し、実施形態の様に、３方向に傾斜面３３，３３Ａがあった方が、前述した様に作業性が良い。
【００２４】
また、ケース１５に保持された液晶表示素子１４の表示切替を行うスイッチ操作装置において、ガイド部１９をケース１５と一体に設けたことにより、前述した効果に加え、別体の部材（ガイド部）を用いる必要がない。
【００２５】
なお、本実施形態においては、押しボタン式スイッチ１７の脚部２１の弾性力で操作部材１８が元の位置に戻るものであるが、従来例の様にコイルバネを用いても良い。あるいは、操作部材１８と一体の弾性片を設けてコイルバネ代わりとしても良い。また、ゴム弾性体からなる押しボタン式スイッチ１７としたが、従来例と同様なスイッチとしても良い。
【００２６】
また、操作部材１８の軸部３０に押しボタン式スイッチ１７の可動部２０を嵌めた後、係止片２８の下端側をガイド部１９内に挿入して、係止部２７が回路基板３の孔部２９端縁に係止された時点で押しボタン式スイッチ１７が回路基板３に配置されることになるが、押しボタン式スイッチ１７を予め回路基板３に固着（配置）しておくようにしても良い。この様にすることによって、軸部３０を廃止しても良い。また、操作部材１８は、例えば操作軸２６と操作軸２６以外の部分が分割してあっても良い。
【００２７】
また、ガイド部１９を液晶表示素子１４を保持するケース１５と一体としたが、保持部材８と一体であっても良いし、ケース１５や保持部材８とは別の単体部材を用いても良い。さらに、孔部２９の全周に傾斜面を有するガイド部であっても良い。
【００２８】
【発明の効果】
以上詳述したように、本発明によれば、回路基板への操作部材の装着が良好であるスイッチ操作装置を提供することができる。
【図面の簡単な説明】
【図１】本発明の実施形態を示すスイッチ操作装置を適用した車両用計器装置の正面図。
【図２】同実施形態を示すスイッチ操作装置の断面図（図１におけるＡ−Ａ断面）。
【図３】同実施形態を示すスイッチ操作装置の正面図。
【図４】同実施形態を示すスイッチ操作装置の断面図（図３におけるＢ−Ｂ断面）。
【図５】同実施形態のスイッチ操作装置における操作部材の装着過程を示す説明図。
【図６】従来例を示すスイッチ操作装置の断面図。
【図７】同スイッチ操作装置における操作部材の装着過程を示す説明図。
【符号の説明】
３回路基板
１５ケース
１７押しボタン式スイッチ
１８操作部材
１９ガイド部
２０可動部
２７係止部
２８係止片
２９孔部
３３，３３Ａ傾斜面[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a switch operating device in which an operation member for pressing a push button switch is mounted on a circuit board on which the push button switch is arranged.
[0002]
[Prior art]
For example, a switch operating device used in a vehicle instrument device will be described with reference to FIGS. FIG. 6 is a partial cross-sectional view of the switch operating device, and FIG. 7 is an explanatory diagram showing a mounting process of the operating member in the switch operating device. Although not shown in the drawings, the instrument device includes, for example, a liquid crystal display element that displays the travel distance (total and trip) of the vehicle, fuel consumption, outside temperature, and the like, and a switch operation device that switches the display of the liquid crystal display element.
[0003]
The switch operating device includes a push button type switch 100 and an operation member 101 for pressing the push button type switch 100. The push button type switch 100 includes a movable portion 102 and a housing 103 held so as to be resettable. It is disposed on the front side of the hard circuit board 104 and soldered to the circuit board 104. The operation member 101 is made of synthetic resin, and includes an operation unit 105, a pressing unit 106 that presses and operates the movable unit 102 of the pushbutton switch 100, a disk-shaped projecting unit 107 that protrudes around the operation unit 105, There are two elastically deformable locking pieces 109 having locking claws 108 extending from the protruding portion 107 toward the circuit board 104, and a cylindrical portion 110 provided on the protruding portion 107 around the pressing portion 106. . Reference numeral 111 denotes a coil spring that is disposed between the protruding portion 107 around the cylindrical portion 110 and the circuit board 104 and repels and biases the operation member 101 toward the counter-pressing side (the counter-pressing button type switch 100 side).
[0004]
The operation member 101 is mounted on the circuit board 104 as follows. The lower end of the locking piece 109 is inserted into the locking hole 112 provided in the circuit board 104 with the coil spring 111 attached to the cylindrical portion 110. Then, as shown in FIG. 7, the inclined surface 113 comes into contact with the end (corner portion 114) of the locking hole 112. When the operation unit 105 is further pushed downward in this state, the locking piece 109 moves downward while being bent in the arrow direction (the push button type switch 100 side), and the locking claw 108 is moved to the lower end (corner portion) of the locking hole 112. 114A), the locking piece 109 returns to its original position, and the locking claw 108 is locked to the edge of the locking hole 112 on the back surface side of the circuit board 104 and attached to the circuit board 104.
[0005]
The pressing operation of the push button switch 100 is as follows. By pressing the operation unit 105 downward, the pressing unit 106 is lowered and presses the movable unit 102. When the movable portion 102 is pressed, the display of the liquid crystal display element as described above is switched (for example, display switching between the total travel distance and the trip travel distance, or zero set of the trip travel distance). The operation member 101 is returned to its original position by the repulsive force of the coil spring 111 by stopping the downward pressing operation of the operation unit 105 (the engagement claw 108 is connected to the end of the engagement hole 112 on the back surface side of the circuit board 104). It is in a state of being locked to the edge, that is, a state shown in FIG.
[0006]
[Problems to be solved by the invention]
However, when the lower end of the locking piece 109 is to be inserted into the locking hole 112 of the circuit board 104, the inclined surface 113 comes into contact with the corner portion 114 of the locking hole 112 as shown in FIG. In this state, the operation unit 105 is further pushed downward, but the inclined surface 113 may be caught by the corner 114. When the angle α of the inclined surface 113 is about 45 degrees or less, the locking piece 109 does not bend smoothly in the direction of the arrow. In order to eliminate this point, if the angle α of the inclined surface 113 is increased (for example, 60 to 70 degrees), the locking piece 109 can be easily bent and the locking claw 108 can easily enter the locking hole 112. However, as the angle α of the inclined surface 113 is increased, the length L of the locking claw 108 is increased. Then, for example, when there is a member covering the back side of the circuit board 104, it must be separated from the circuit board 104, and the instrument device becomes large.
[0007]
Further, when trying to insert the lower end of the locking piece 109 into the locking hole 112 provided in the circuit board 104, the locking hole 112 is small, so that it is difficult to aim and the insertion property is poor. That is, the operation member may not be smoothly attached to the circuit board. The reason why the locking hole 112 cannot be made large is that if the locking hole 112 is large, the locking claw 108 is not locked to the edge of the locking hole 112 or the position of the operation member 101 with respect to the circuit board 104 is difficult to be determined. .
[0008]
The present invention has been made in view of these points, and an object of the present invention is to provide a switch operating device in which the operation member is well mounted on the circuit board.
[0009]
[Means for Solving the Problems]
Since the present invention is to solve the above problems, a circuit board in which a push-button switch is disposed with a display element and a movable portion held in the case, the display switching of the display device by pressing the movable portion An operation member to be provided, and an elastically deformable locking piece having a locking portion on a distal end side is provided on the operation member, and the locking member is bent in the hole provided in the circuit board while bending the locking piece. In the switch operating device in which the locking portion is locked to the edge of the hole portion by inserting a portion, at least on the circuit board on the periphery of the hole portion on the side where the locking portion is provided, A guide part having an inclined surface inclined toward the edge of the hole part is provided integrally with the case, and the inner edge of the guide part is made to coincide with the edge of the hole part or smaller in diameter than the edge of the hole part. Is.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
A vehicle instrument device to which a switch operation device of the present invention is applied will be described as an embodiment. 1 to 5 show an embodiment of the present invention. FIG. 1 is a front view of an instrument device including a speedometer 1 and a tachometer 2. FIG. 2 is a cross-sectional view of the speedometer 1 including a switch operating device (cross section AA in FIG. 1). 3 is a front view of the switch operating device (however, the circuit board is removed), FIG. 4 is a cross-sectional view of the switch operating device (cross section BB in FIG. 3), and FIG. It is explanatory drawing shown. In FIG. 1, the display portions of the speedometer 1 and the tachometer 2 are not shown.
[0012]
The vehicle instrument device includes a rigid circuit board 3, and an instrument body 5 having a rotating shaft 4 that is attached to the circuit board 3 on the back side of the circuit board 3 in a conductive state and extends forward through the circuit board 3. A pointer 6 fixed to the distal end side of the rotating shaft 4, a display plate 7 provided behind the pointer 6 and provided with a display unit (not shown) corresponding to the operation of the pointer 6, and the display plate 7 and a circuit board 3, a holding member 8 made of white synthetic resin for holding the display board 7, and a light source mounted on the circuit board 3 to illuminate the pointer 6 and the display board 7 from behind. Light emitting diodes 9 and 9A, a cover 10 that covers the back side of the circuit board 3, a cover member 12 that is disposed on the front side of the display board 7 and that has an opening 11 that defines the visible area of the display board 7, a pointer 6 and a display A colorless and transparent see-through plate 13 covering the front side of the plate 7 or the like is provided.
[0013]
In addition, the instrument device includes an information display X that displays information such as the vehicle travel distance (total and trip), fuel consumption, outside temperature, and time, and a switch operation device Y that switches the display of the information display X. .
[0014]
The information display X is arranged in the speedometer 1 and displays, for example, the liquid crystal display element 14 that displays the various information described above, a synthetic resin case 15 that holds the liquid crystal display element 14, the speedometer 1 and the rotation. A light-emitting diode as a light source that is mounted on an electronic component (not shown) for driving a total of two meter bodies 5 and the circuit board 3 on which the above-described light-emitting diodes 9 and 9A are mounted, and illuminates the liquid crystal display element 14 from behind. 9B etc. The liquid crystal display element 14 and the circuit board 3 are connected by a conductive metal terminal (not shown). Further, a window portion 16 is formed on the display plate 7 so that the display of the liquid crystal display element 14 can be visually recognized from the window portion 16.
[0015]
The switch operating device Y is composed of, for example, a push button switch 17 made of a rubber elastic body such as silicone rubber, a hard circuit board 3 on which the push button switch 17 is arranged, and a push button switch 17 for pressing operation. An operation member 18 made of resin and a guide portion 19 described later are provided. The circuit board 3 is a board on which the instrument body 5 of the speedometer 1 and the tachometer 2 and the information display X are mounted.
[0016]
The push button switch 17 includes a movable portion 20 and a trumpet-shaped leg portion 21, and a movable contact 22 is provided on the circuit board 3 side of the movable portion 20. A through hole 23 is provided at the center of the movable portion 20.
[0017]
The operating member 18 abuts on the movable part 20 of the push button switch 17 and extends to the outside through a disk-like pressing part 24 that presses the movable part 20 and a hole 25 formed in the see-through plate 13. A cylindrical operation shaft 26 for operating the pressing portion 24, and two elastically deformable pieces extending from the periphery of the pressing portion 24 to the circuit board 3 side in an L shape and having a locking portion 27 on the tip side. A locking piece 28 is provided. The locking portion 27 is locked to the edge on the back side of the square hole portion 29 provided in the circuit board 3. Moreover, it has the axial part 30 extended from the center of the press part 24 to the circuit board 3 side, and this axial part 30 penetrates the through-hole 23 of the pushbutton type switch 17, and the axial hole 31 provided in the circuit board 3. FIG. is doing.
[0018]
Around the hole 29 provided in the circuit board 3, a guide portion 19 made of synthetic resin is disposed so as to surround the hole 29. The guide portion 19 in the present embodiment is provided integrally with the case 15 that holds the liquid crystal display element 14, and the edge (corner portion 32) of the hole portion 29 is formed on the circuit board 3 except the push button type switch 17 side. The three inclined surfaces 33, 33A are inclined toward the surface (the side on which the locking portion 27 is provided is referred to as an inclined surface 33). The inner edge 34 of the guide portion 19 coincides with the edge of the hole portion 29 or has a smaller diameter than the edge of the hole portion 29 (a state in which the inner edge 34 slightly protrudes toward the center side of the hole portion 29). A fixed contact 35 is printed around the shaft hole 31 provided in the circuit board 3.
[0019]
In addition, since the inclined surface 33 is provided in the guide part 19, it is not always necessary to provide the inclined surface in the locking part 27, but the locking part 27 is downward along the cross section of the hole 29 of the circuit board 3. In order to reduce the resistance when moving (to reduce the contact area), in this embodiment, an inclined surface having the same angle (40 to 45 degrees) as that of the conventional example is provided in the locking portion 27. . Further, the angle β of the inclined surface 33 on the locking portion 27 side is larger (50 to 70 degrees) than the angle α of the inclined surface 113 in the conventional example.
[0020]
When the operation member 18 is mounted on the circuit board 3, it is performed as follows. The lower end side of the locking piece 28 is inserted into the guide portion 19 having the inclined surfaces 33 and 33A in a state where the movable portion 20 of the push button switch 17 is fitted to the shaft portion 30 of the operation member 18. Then, as shown in FIG. 5, the locking portion 27 comes into contact with the inclined surface 33. When the operating shaft 26 is further pushed downward in this state, the locking piece 28 bends in the direction of the arrow (on the push button type switch 17 side), and the locking portion 27 moves downward along the inclined surface 33. When 27 is removed from the lower end (corner portion 32A) of the hole 29 of the circuit board 3, the locking piece 28 returns to its original position, and the locking part 27 is at the edge of the hole 29 on the back side of the circuit board 3. Locked and attached to the circuit board 3.
[0021]
The pressing operation of the push button switch 17 is as follows. By pushing the operating shaft 26 downward, the leg portion 21 of the push-button switch 17 is deformed and the movable portion 20 is pushed downward. The display of such a liquid crystal display element is switched (for example, display switching of the total travel distance and trip travel distance, or zero set of trip travel distance). By stopping the downward pushing operation of the operation shaft 26, the movable portion 20 is restored to the original state by the elastic force of the leg portion 21, the movable contact 22 is separated from the fixed contact 35, and the operation member 18 is also restored. Return to position. That is, the state shown in FIG. 4 is obtained.
[0022]
As described above, the circuit board 3 on which the push button switch 17 having the movable portion 20 is arranged and the operation member 18 that presses the movable portion 20 are provided, and the operation member 18 has the locking portion 27 on the distal end side. An elastically deformable locking piece 28 is provided, and the locking part 27 is inserted into a hole 29 provided in the circuit board 3 while the locking piece 28 is bent, and the locking part 27 is attached to the edge of the hole 29. In the switch operating device to be locked, an inclined surface 33 inclined toward the edge (corner portion 32) of the hole 29 is formed on the circuit board 3 around the hole 29 on the side where the locking portion 27 is provided. Since the guide portion 19 is provided, the locking piece 28 smoothly bends toward the push button type switch 17 side without providing the locking portion 27 with an inclined surface having a large inclination angle, and the operation member 18 to the circuit board 3 is provided. Is mounted well and the height H of the locking portion 27 is Kutezumi, not a other disorders.
[0023]
Further, the inclined surfaces 33 and 33A are provided on the guide portion 19 disposed on the circuit board 3 on the insertion side of the engaging piece 28, so that the inclined surfaces 33 and 33A are engaged with the engaging portion 27 (the engaging piece 28). The workability when the operation member 18 is mounted on the circuit board 3 is good. In addition, although the three inclined surfaces 33 and 33A were provided in the guide part 19 with respect to one hole part 29, the inclined surface 33 should just exist in the side which provided the latching | locking part 27 at least. However, as described above, workability is better when the inclined surfaces 33 and 33A are provided in three directions as in the embodiment.
[0024]
Further, in the switch operating device for switching the display of the liquid crystal display element 14 held in the case 15, the guide portion 19 is provided integrally with the case 15, so that in addition to the above-described effects, a separate member (guide portion) is provided. Need not be used.
[0025]
In the present embodiment, the operation member 18 is returned to the original position by the elastic force of the leg portion 21 of the push button switch 17, but a coil spring may be used as in the conventional example. Alternatively, an elastic piece integral with the operation member 18 may be provided to replace the coil spring. Further, although the push button switch 17 made of a rubber elastic body is used, a switch similar to the conventional example may be used.
[0026]
Further, after the movable portion 20 of the push button switch 17 is fitted to the shaft portion 30 of the operation member 18, the lower end side of the locking piece 28 is inserted into the guide portion 19, and the locking portion 27 is connected to the circuit board 3. The push button type switch 17 is arranged on the circuit board 3 when it is locked to the edge of the hole 29. The push button type switch 17 is fixed (arranged) on the circuit board 3 in advance. May be. By doing so, the shaft portion 30 may be eliminated. Further, the operation member 18 may be divided, for example, at portions other than the operation shaft 26 and the operation shaft 26.
[0027]
Further, although the guide portion 19 is integrated with the case 15 that holds the liquid crystal display element 14, it may be integrated with the holding member 8, or a single member different from the case 15 and the holding member 8 may be used. . Furthermore, a guide portion having an inclined surface around the entire circumference of the hole portion 29 may be used.
[0028]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to provide a switch operating device in which the operation member is well mounted on the circuit board.
[Brief description of the drawings]
FIG. 1 is a front view of a vehicle instrument device to which a switch operation device according to an embodiment of the present invention is applied.
FIG. 2 is a cross-sectional view of the switch operating device showing the embodiment (cross section AA in FIG. 1).
FIG. 3 is a front view of the switch operating device showing the embodiment;
FIG. 4 is a cross-sectional view of the switch operating device showing the embodiment (cross section BB in FIG. 3).
FIG. 5 is an explanatory view showing a mounting process of the operation member in the switch operation device of the embodiment.
FIG. 6 is a cross-sectional view of a switch operating device showing a conventional example.
FIG. 7 is an explanatory view showing a mounting process of an operation member in the switch operation device.
[Explanation of symbols]
3 Circuit board 15 Case 17 Push button type switch 18 Operation member 19 Guide part 20 Movable part 27 Locking part 28 Locking piece 29 Hole 33, 33A Inclined surface

Claims

Comprising a circuit board in which a push-button switch is disposed with a display element and a movable portion held in the casing, an operating member for performing display switching of the display device by pressing the movable part, the operating member An elastically deformable locking piece having a locking portion on the front end side is provided, and the locking portion is inserted into a hole provided in the circuit board while bending the locking piece, and an end of the hole is formed. In the switch operating device in which the locking portion is locked to the edge, an inclination inclined toward the edge of the hole portion on the circuit board at the periphery of the hole portion at least on the side where the locking portion is provided A switch operating device characterized in that a guide portion having a surface is provided integrally with the case, and an inner edge of the guide portion is made to coincide with an edge of the hole portion or smaller in diameter than an edge of the hole portion.