JP7013053B2

JP7013053B2 - Drip-proof structure of electronic parts

Info

Publication number: JP7013053B2
Application number: JP2021064291A
Authority: JP
Inventors: 吉晴塚原; 敏桑原; 直紀林
Original assignee: 帝国通信工業株式会社
Priority date: 2016-12-27
Filing date: 2021-04-05
Publication date: 2022-01-31
Anticipated expiration: 2037-12-18
Also published as: JP2021101435A; JP6868281B2; JP2018107127A

Description

本発明は、ケース内に回路基板と導光体とを収納してカバーで覆った電子部品を防滴するのに用いて好適な電子部品の防滴構造に関するものである。 The present invention relates to a drip-proof structure of an electronic component suitable for accommodating a circuit board and a light guide in a case and drip-proofing the electronic component covered with a cover.

従来、回転式電子部品の中には、例えば特許文献１に示す回転式電子部品（１）のように、回転つまみ（１００）と回路基板（１５０）を第１，第２ケース（１０，５０）内に収納し、回転つまみ（１００）の外周部分の一部を第１，第２ケース（１０，５０）に設けた開口から外部に露出し、回転つまみ（１００）の前記開口から露出した部分を指等で回転操作することで摺動子（１３０）を駆動し、この摺動子（１３０）が摺接する回路基板（１５０）上の摺接パターン（１５３）の検出出力を変化させる構造のものがある。 Conventionally, among the rotary electronic components, for example, as in the rotary electronic component (1) shown in Patent Document 1, a rotary knob (100) and a circuit board (150) are included in the first and second cases (10, 50). ), And a part of the outer peripheral portion of the rotary knob (100) was exposed to the outside through the openings provided in the first and second cases (10, 50), and was exposed from the opening of the rotary knob (100). A structure that drives the slider (130) by rotating the portion with a finger or the like, and changes the detection output of the sliding contact pattern (153) on the circuit board (150) to which the slider (130) is in sliding contact. There is a thing.

また上記回転式電子部品（１）においては、回路基板（１５０）の前記摺接パターン（１５３）を形成した反対側の面上に発光素子（１５５ａ）を設置し、その上に導光体（２００）を取り付け、前記発光素子（１５５ａ）から発射された光を、導光体（２００）内に導入して回転つまみ（１００）の裏面側等の所望の位置に導いて、回転つまみ（１００）等を照明する構成とされている。 Further, in the rotary electronic component (1), a light emitting element (155a) is installed on the surface of the circuit board (150) on the opposite side of the circuit board (150) on which the sliding contact pattern (153) is formed, and a light guide body (155a) is placed on the light emitting element (155a). 200) is attached, and the light emitted from the light emitting element (155a) is introduced into the light guide body (200) and guided to a desired position such as the back surface side of the rotary knob (100), and the rotary knob (100) is attached. ) Etc. are illuminated.

また上記回転式電子部品（１）においては、導光体（２００）によって回路基板（１５０）の発光素子（１５５ａ）等を設置した側の面を覆う構造とすることで、前記第１，第２ケース（１０，５０）に設けた開口から浸入した液体の前記発光素子（１５５ａ）等への付着を防止している。 Further, in the rotary electronic component (1), the light guide body (200) covers the surface of the circuit board (150) on the side where the light emitting element (155a) or the like is installed, so that the first and first revolutionary electronic components (1) are covered with the light guide body (200). The liquid infiltrated through the openings provided in the two cases (10, 50) is prevented from adhering to the light emitting element (155a) or the like.

特開２０１５－１０６５１４号公報Japanese Unexamined Patent Publication No. 2015-106514

しかし、例えばこの回転式電子部品（１）を、自動車の車内に設置し、この車内をスチーム洗浄したような場合は、その蒸気が前記第１，第２ケース（１０，５０）に設けた開口から浸入し、浸入した蒸気が、さらに前記回路基板（１５０）とこれを覆っている導光体（２００）の当接面の間の僅かな隙間を通過してその内側に入り込み、内部で結露して水滴になり、発光素子（１５５ａ）等の電子部品に不具合を生じさせる虞があった。 However, for example, when the rotary electronic component (1) is installed in a car and the inside of the car is steam-cleaned, the steam of the rotary electronic component (1) is provided in the first and second cases (10, 50). The vapor that has infiltrated from the circuit board (150) further passes through a slight gap between the contact surface between the circuit board (150) and the light guide body (200) that covers the circuit board (200) and enters the inside thereof, and dew condensation is formed inside the circuit board (150). Then, it becomes water droplets, which may cause a defect in electronic parts such as a light emitting element (155a).

本発明は上述の点に鑑みてなされたものでありその目的は、簡単な構造で、効果的な防滴を行うことができる電子部品の防滴構造を提供することにある。 The present invention has been made in view of the above points, and an object of the present invention is to provide a drip-proof structure of an electronic component capable of effectively drip-proofing with a simple structure.

本発明は、一方の面側に収納部を形成してなるケースと、前記ケースの収納部に収納される回路基板と、前記回路基板上に設置され、前記回路基板に取り付けた発光素子から発射された光を導入して所望の位置に設けた光出射面から出射させる導光体と、前記回路基板と導光体を収納した収納部を覆うカバーと、を有する電子部品であって、前記導光体の前記カバー側を向く背面に、当該背面を伝ってくる液体を排水方向にガイドする排水ガイド突起を設け、当該排水ガイド突起は、前記導光体の光出射面を設けた反対面側の一方の角部を挟む両側の辺に至ることで、当該角部を他の部分から仕切る形状に形成されていることを特徴としている。
なお、さらに、前記ケースの基部の収納部を設けた反対面側に第２収納部を設け、この第２収納部に回転つまみを収納すると共に、前記ケースの基部に設けた挿通部を介して前記回路基板と回転つまみの間に検出手段を設置し、前記回転つまみを回動することでこの検出手段の出力信号を変化させるようにして回転式電子部品を構成しても良い。 The present invention emits light from a case having a storage portion formed on one surface side, a circuit board housed in the storage portion of the case, and a light emitting element installed on the circuit board and attached to the circuit board. An electronic component comprising a light guide body that introduces the light and emits light from a light emitting surface provided at a desired position, and a cover that covers the circuit board and the storage portion that houses the light guide body. A drainage guide protrusion for guiding the liquid traveling on the back surface in the drainage direction is provided on the back surface of the light guide body facing the cover side, and the drainage guide protrusion is the opposite surface provided with the light emitting surface of the light guide body. It is characterized in that it is formed in a shape that partitions the corner portion from the other portion by reaching both sides sandwiching one corner portion on the side.
Further, a second storage portion is provided on the side opposite to the storage portion of the base of the case, and the rotary knob is stored in the second storage portion, and the rotary knob is stored in the second storage portion, and the rotary knob is stored in the second storage portion. A rotary electronic component may be configured by installing a detection means between the circuit board and the rotary knob and changing the output signal of the detection means by rotating the rotary knob.

本発明によれば、収納部内に浸入した液体や蒸気の内、導光体の背面側に浸入した液体や蒸気を、所望の排水方向に導くことができ、効果的な防滴を図ることができる。 According to the present invention, among the liquids and vapors that have entered the storage portion, the liquids and vapors that have entered the back side of the light guide can be guided in a desired drainage direction, and effective drip-proofing can be achieved. can.

また本発明は、前記排水ガイド突起が、前記導光体の背面を伝う液体を、前記回路基板に電気的に接続されるコネクタの設置位置から離れる方向に導く形状に形成されていることを特徴としている。
これによって、回路基板に接続したコネクタへの液体の付着も、効果的に防止することができる。 Further, the present invention is characterized in that the drainage guide protrusion is formed in a shape that guides the liquid traveling on the back surface of the light guide body in a direction away from the installation position of the connector electrically connected to the circuit board. It is supposed to be.
As a result, it is possible to effectively prevent the liquid from adhering to the connector connected to the circuit board.

また本発明は、前記ケースに、前記カバーの爪部を係止して取り付ける被係止部を設け、当該被係止部の設置位置は、前記排水ガイド突起によって排水方向にガイドされた液体が、当該被係止部と前記カバーの爪部を係止した隙間から排出される位置であることを特徴としている。 Further, in the present invention, the case is provided with a locked portion for locking and attaching the claw portion of the cover, and the installation position of the locked portion is such that the liquid guided in the drainage direction by the drainage guide protrusion is used. It is characterized in that the position is such that the locked portion and the claw portion of the cover are discharged from the locked gap.

本発明によれば、簡単な構造で、効果的な防滴を行うことができる。 According to the present invention, effective drip-proofing can be performed with a simple structure.

回転式電子部品１の斜視図である。It is a perspective view of the rotary electronic component 1. 回転式電子部品１を別の角度から見た斜視図である。It is a perspective view which looked at the rotary electronic component 1 from another angle. 回転式電子部品１の概略断面図（図１のＡ－Ａ概略断面図）である。It is a schematic cross-sectional view (AA schematic cross-sectional view of FIG. 1) of a rotary electronic component 1. FIG. 回転式電子部品１から第３カバー３００と防滴部材２５０と第１カバー２２０と第２カバー７０を分解して示す分解斜視図である。It is an exploded perspective view which shows the 3rd cover 300, the drip-proof member 250, the 1st cover 220, and the 2nd cover 70 disassembled from the rotary electronic component 1. 図４を別の角度から見た分解斜視図である。FIG. 4 is an exploded perspective view of FIG. 4 viewed from another angle. 第３カバー３００とパッキン２５０と第１カバー２２０と第２カバー７０を除く回転式電子部品１の他の部品の分解斜視図である。It is an exploded perspective view of the other parts of the rotary electronic component 1 except the 3rd cover 300, the packing 250, the 1st cover 220 and the 2nd cover 70. 図６を別の角度から見た分解斜視図である。FIG. 6 is an exploded perspective view of FIG. 6 viewed from another angle. 導光体１９０の斜視図である。It is a perspective view of the light guide body 190. 導光体１９０の斜視図である。It is a perspective view of the light guide body 190. 回転式電子部品１から第３カバー３００と第１カバー２２０と導光体１９０と回路基板１６０と端子ユニット１４０とを除いた残りの部分を示す斜視図である。It is a perspective view which shows the rest except the 3rd cover 300, the 1st cover 220, the light guide body 190, the circuit board 160, and the terminal unit 140 from the rotary electronic component 1. 回転式電子部品１から第３カバー３００を取り外した状態を示す分解斜視図である。It is an exploded perspective view which shows the state which the 3rd cover 300 was removed from the rotary electronic component 1.

以下、本発明の１実施形態に係る防滴構造を用いて構成した回転式電子部品１を、図面を参照して詳細に説明する。図１は回転式電子部品１の斜視図、図２は回転式電子部品１を別の角度から見た斜視図、図３は回転式電子部品１の概略断面図（図１のＡ－Ａ概略断面図）、図４は回転式電子部品１から第３カバー３００と防滴部材（以下「パッキン」という）２５０と第１カバー２２０と第２カバー７０を分解して示す分解斜視図、図５は図４を別の角度から見た分解斜視図、図６は第３カバー３００とパッキン２５０と第１カバー２２０と第２カバー７０を除く回転式電子部品１の他の部品の分解斜視図、図７は図６を別の角度から見た分解斜視図である。なお、回転つまみ１００の操作部１０１を露出する面側を前面、その反対側を後面といい、また図１に表示している第３カバー３００の上を向いている面側を「上」、その反対側を「下」といい、また前後方向と上下方向の両方向に直交する水平方向を左右方向ということとする。 Hereinafter, the rotary electronic component 1 configured by using the drip-proof structure according to the embodiment of the present invention will be described in detail with reference to the drawings. 1 is a perspective view of the rotary electronic component 1, FIG. 2 is a perspective view of the rotary electronic component 1 as viewed from another angle, and FIG. 3 is a schematic cross-sectional view of the rotary electronic component 1 (schematic AA of FIG. 1). Sectional view), FIG. 4 is an exploded perspective view showing the third cover 300, the drip-proof member (hereinafter referred to as “packing”) 250, the first cover 220, and the second cover 70 from the rotary electronic component 1 in an exploded manner. 4 is an exploded perspective view of FIG. 4 viewed from another angle, FIG. 6 is an exploded perspective view of other parts of the rotary electronic component 1 excluding the third cover 300, the packing 250, the first cover 220, and the second cover 70. FIG. 7 is an exploded perspective view of FIG. 6 as viewed from another angle. The surface side of the rotary knob 100 that exposes the operation unit 101 is referred to as a front surface, the opposite side thereof is referred to as a rear surface, and the surface side facing upward of the third cover 300 shown in FIG. 1 is referred to as “upper”. The opposite side is referred to as "downward", and the horizontal direction orthogonal to both the front-back direction and the up-down direction is referred to as the left-right direction.

これらの図に示すように、回転式電子部品１は、ケース２０と、第２カバー７０と、一対の摺動子１３０を取り付けた回転つまみ１００と、端子ユニット１４０と、回路基板１６０と、導光体１９０と、第１カバー２２０と、パッキン２５０と、第３カバー３００とを具備して構成されている。 As shown in these figures, the rotary electronic component 1 includes a case 20, a second cover 70, a rotary knob 100 to which a pair of sliders 130 are attached, a terminal unit 140, a circuit board 160, and a guide. It includes a light body 190, a first cover 220, a packing 250, and a third cover 300.

ケース２０は非透明材料からなる合成樹脂の一体成形品であり、例えば図６，図７に示すように、略平板状の基部２０Ａの上下の辺に、左右方向に延びる側壁部２０Ｂ、２０Ｃを設けることで、基部２０Ａの一方の面側に第１収納部２５を形成し、他方の面側に第２収納部２３を形成している。基部２０Ａの前方には側壁部２０Ｂ、２０Ｃが形成されていない。また、基部２０Ａの後方には、略箱型に突出するコネクタ部（コネクタ）２０Ｄが形成されている。そして、基部２０Ａには、第２収納部２３側に向かって突出する略円筒状の軸受部２１が設けられている。軸受部２１の中央は、基部２０Ａを貫通する挿通部２２となっている。また、側壁部２０Ｂ，２０Ｃの第２収納部２３側の部分には、下記する第２カバー７０の爪部７９を係止する矩形状の貫通孔からなる一対の被係止部２７が設けられている。また側壁部２０Ｂ，２０Ｃの第１収納部２５側の部分には、下記する第１カバー２２０の爪部２２３を係止する矩形状の貫通孔からなる一対の被係止部２９が形成されている。また側壁部２０Ｂ，２０Ｃの外面の前記両被係止部２７，２９の間の位置には、下記する第３カバー３００の被係止部３０９を係止する爪状の一対の係止部３０が形成されている。基部２０Ａの第１収納部２５側の面の外周近傍部分を囲む部分は、下記する導光体１９０の外周先端面１９４を当接する当接面となっている。 The case 20 is an integrally molded product of a synthetic resin made of a non-transparent material. For example, as shown in FIGS. 6 and 7, side wall portions 20B and 20C extending in the left-right direction are provided on the upper and lower sides of a substantially flat base portion 20A. By providing the base portion 20A, the first storage portion 25 is formed on one surface side, and the second storage portion 23 is formed on the other surface side. The side wall portions 20B and 20C are not formed in front of the base portion 20A. Further, behind the base portion 20A, a connector portion (connector) 20D projecting in a substantially box shape is formed. The base portion 20A is provided with a substantially cylindrical bearing portion 21 that projects toward the second storage portion 23 side. The center of the bearing portion 21 is an insertion portion 22 penetrating the base portion 20A. Further, a pair of locked portions 27 composed of rectangular through holes for locking the claw portions 79 of the second cover 70 described below are provided on the portions of the side wall portions 20B and 20C on the second storage portion 23 side. ing. Further, a pair of locked portions 29 formed of rectangular through holes for locking the claw portion 223 of the first cover 220 described below are formed in the portions of the side wall portions 20B and 20C on the first storage portion 25 side. There is. Further, at a position between the both locked portions 27 and 29 on the outer surface of the side wall portions 20B and 20C, a pair of claw-shaped locking portions 30 for locking the locked portion 309 of the third cover 300 described below. Is formed. The portion surrounding the outer peripheral portion of the surface of the base portion 20A on the first storage portion 25 side is a contact surface that abuts the outer peripheral tip surface 194 of the light guide body 190 described below.

一方、コネクタ部２０Ｄは、矩形箱型に突出するコネクタ本体部４３を有し、このコネクタ本体部４３の後方の面を開放することで、凹状の外部コネクタ挿入部４５を形成している。またコネクタ部２０Ｄは、第１収納部２５側に向かって開口する略Ｌ字状で凹状の端子ユニット収納部３１も有している。外部コネクタ挿入部４５と端子ユニット収納部３１は連通している。そして端子ユニット収納部３１に下記する端子ユニット１４０を挿入することで、端子ユニット１４０の後方側を向く端子１４１の部分が前記外部コネクタ挿入部４５内に収納され、コネクタ部２０Ｄが形成される。このコネクタ部２０Ｄには、外部コネクタ挿入部４５にその後方から外部コネクタが挿入され、外部コネクタに設けたメス側の各端子が前記各端子１４１に接続される。 On the other hand, the connector portion 20D has a connector main body portion 43 protruding in a rectangular box shape, and by opening the rear surface of the connector main body portion 43, a concave external connector insertion portion 45 is formed. Further, the connector portion 20D also has a substantially L-shaped and concave terminal unit storage portion 31 that opens toward the first storage portion 25 side. The external connector insertion portion 45 and the terminal unit storage portion 31 communicate with each other. Then, by inserting the terminal unit 140 described below into the terminal unit storage portion 31, the portion of the terminal 141 facing the rear side of the terminal unit 140 is housed in the external connector insertion portion 45, and the connector portion 20D is formed. An external connector is inserted into the connector portion 20D from behind the external connector insertion portion 45, and each terminal on the female side provided in the external connector is connected to each of the terminals 141.

また前記軸受部２１の円弧状外周面の一部分と、その左右両側壁部２０Ｂ、２０Ｃの第２収納部２３側の前方の辺は、パッキン搭載面３３（３３ａ～３３ｃ）となっている。また基部２０Ａの第１収納部２５側の面の中央付近（下記する回路基板１６０の各ガイド部１７３に対向する位置）には、一対の棒状に突出する基板ガイド部３５が形成されている。また側壁部２０Ｂ、２０Ｃの第１収納部２５側に突出している部分の前方近傍部分の外面側には、左右方向に向かって伸びる平板状の突出部３７とその後方の凹部３９とが形成されている。さらに凹部３９の後方の側壁部２０Ｂ、２０Ｃの先端面には、小穴からなる挿入部４１が形成されている。また図示はしていないが、第２収納部２３内の軸受部２１を設けた根元部分の面（下記するクリック用ボール１２７に対向する位置）には、円弧状方向（クリック用ボール１２７の移動する円弧方向）に向かって凹凸するクリック係合部が形成されている。 Further, a part of the arcuate outer peripheral surface of the bearing portion 21 and the front side of the left and right side wall portions 20B and 20C on the second storage portion 23 side are packing mounting surfaces 33 (33a to 33c). Further, a pair of rod-shaped projecting substrate guide portions 35 are formed near the center of the surface of the base portion 20A on the first accommodating portion 25 side (positions facing each guide portion 173 of the circuit board 160 described below). Further, on the outer surface side of the portion near the front of the portion of the side wall portions 20B and 20C protruding toward the first storage portion 25, a flat plate-shaped protruding portion 37 extending in the left-right direction and a recess 39 behind the flat plate-shaped protruding portion 37 are formed. ing. Further, an insertion portion 41 made of a small hole is formed on the tip surfaces of the side wall portions 20B and 20C behind the recess 39. Although not shown, the movement of the click ball 127 in the arcuate direction (movement of the click ball 127) on the surface of the root portion (position facing the click ball 127 described below) where the bearing portion 21 is provided in the second storage portion 23. A click engaging portion that is uneven toward the arc direction) is formed.

第２カバー７０は、非透明材料からなる合成樹脂を一体成形して構成されており、略平板矩形状のケース本体部７１と、ケース本体部７１から回転つまみ１００側に向けて突出する円板状のつまみ支持部７３とを具備して構成されている。つまみ支持部７３の外周にはケース側に向けて突出する円筒状の外側壁７４が設けられ、その内側には同心円状に突出する有底円筒状の突出部７５が設けられている。ケース本体部７１の上下両側辺からは、回転つまみ１００側に向けて一対の係止爪７７が突出している。係止爪７７は平板状であり、その先端近傍の両外側位置に爪部７９を設けている。またケース本体部７１の外周の一部は、下記するパッキン２５０を当接するパッキン搭載面８１となっている。 The second cover 70 is formed by integrally molding a synthetic resin made of a non-transparent material, and has a substantially flat plate rectangular case main body 71 and a disk protruding from the case main body 71 toward the rotary knob 100 side. It is configured to include a knob support portion 73 having a shape. A cylindrical outer wall 74 projecting toward the case side is provided on the outer periphery of the knob support portion 73, and a bottomed cylindrical projecting portion 75 projecting concentrically is provided inside the cylindrical outer wall 74. A pair of locking claws 77 project from the upper and lower sides of the case main body 71 toward the rotary knob 100 side. The locking claw 77 has a flat plate shape, and claw portions 79 are provided at both outer positions near the tip thereof. Further, a part of the outer periphery of the case main body 71 is a packing mounting surface 81 that abuts the packing 250 described below.

回転つまみ１００は合成樹脂の成形品であり、透明材料と非透明材料からなる二色成形品である。回転つまみ１００は略円板形状であり、その外周面が操作部１０１となっている。回転つまみ１００の第２カバー７０側を向く面には、円形の凹部１０３が設けられ、凹部１０３内には、２つの筒状の突出部１０５，１０７が同心円状に突設されている。両突出部１０５，１０７の間の円形の凹部は、前記第２カバー７０の突出部７５を挿入する挿入部１０９となっている。また突出部１０７中央の凹部の底面は、略円錐凹状の光反射面１１０（図３参照）となっている。回転つまみ１００のケース２０側を向く面の中央からは、略円柱形状の軸部１１１が突出している。軸部１１１の上面には、一対の摺動子１３０が取り付けられており、さらにその中央位置からは円錐台形状の導光用突起１１５が突出している。導光用突起１１５の先端面は光入射面１１７になっている。両摺動子１３０は同一形状であり、基部１３１から円弧状のアーム部１３３を突出して基部１３１上に折り返し、アーム部１３３の中央位置に接点部１３５を形成して構成されている。軸部１１１の周囲には、リング状の防滴用凹部１２３が形成されている。また回転つまみ１００のケース２０側を向く面の外周部分には、有底円形の穴からなるクリック機構収納部１２４が形成されている。クリック機構収納部１２４には、コイルバネ１２５とクリック用ボール１２７とが収納される。 The rotary knob 100 is a molded product of synthetic resin, and is a two-color molded product made of a transparent material and a non-transparent material. The rotary knob 100 has a substantially disk shape, and its outer peripheral surface serves as an operation unit 101. A circular recess 103 is provided on the surface of the rotary knob 100 facing the second cover 70 side, and two cylindrical protrusions 105 and 107 are concentrically projected in the recess 103. The circular recess between the protruding portions 105 and 107 is an insertion portion 109 into which the protruding portion 75 of the second cover 70 is inserted. The bottom surface of the recess in the center of the protrusion 107 is a substantially conical concave light reflecting surface 110 (see FIG. 3). A substantially cylindrical shaft portion 111 projects from the center of the surface of the rotary knob 100 facing the case 20 side. A pair of sliders 130 are attached to the upper surface of the shaft portion 111, and a truncated cone-shaped light guide projection 115 projects from the center position thereof. The tip surface of the light guide projection 115 is a light incident surface 117. Both sliders 130 have the same shape, and are configured by projecting an arcuate arm portion 133 from the base portion 131 and folding it back onto the base portion 131 to form a contact portion 135 at the center position of the arm portion 133. A ring-shaped drip-proof recess 123 is formed around the shaft portion 111. Further, a click mechanism accommodating portion 124 having a bottomed circular hole is formed on the outer peripheral portion of the surface of the rotary knob 100 facing the case 20 side. The coil spring 125 and the click ball 127 are stored in the click mechanism storage unit 124.

また上述のように、回転つまみ１００は、２種類の樹脂Ａ１，Ａ２（図３参照）を一体成形することによって構成されている。一方の樹脂Ａ１は透明な樹脂であり、もう一方の樹脂Ａ２は不透明な樹脂である。透明な樹脂Ａ１は、その全体がつまみ用導光部Ａ１を構成し、この回転つまみ１００の軸部１１１と操作部１０１の間を光学的につないでおり、操作部１０１の外周面と、導光用突起１１５の光入射面１１７間を光学的に結ぶように成形されている。光入射面１１７は円形の平面状に形成されている。つまみ用導光部Ａ１は、略円板状の導光本体部Ａ１１と、導光本体部Ａ１１の中心から軸部１１１側に垂直に突出して軸部１１１の中心部分を構成する導光軸部Ａ１３とを具備している。導光本体部Ａ１１の導光軸部Ａ１３とは反対側の面の中央に、前記光反射面１１０が形成されている。また前記両突出部１０５，１０７も導光本体部Ａ１１の一部を構成している。一方、樹脂Ａ２は、導光本体部Ａ１１の光反射面１１０側の面の操作部１０１の裏面側の部分と、導光本体部Ａ１１の軸部１１１側の面略全体の部分とに形成されており、軸部１１１の導光軸部Ａ１３を除く部分と、防滴用凹部１２３とを構成している。 Further, as described above, the rotary knob 100 is configured by integrally molding two types of resins A1 and A2 (see FIG. 3). One resin A1 is a transparent resin, and the other resin A2 is an opaque resin. The transparent resin A1 as a whole constitutes a light guide portion A1 for a knob, and optically connects between the shaft portion 111 and the operation portion 101 of the rotary knob 100, and guides the outer peripheral surface of the operation portion 101. It is formed so as to optically connect between the light incident surfaces 117 of the light projection 115. The light incident surface 117 is formed in a circular planar shape. The light guide unit A1 for the knob has a substantially disk-shaped light guide main body A11 and a light guide shaft portion that projects vertically from the center of the light guide main body A11 toward the shaft portion 111 to form the central portion of the shaft portion 111. It is equipped with A13. The light reflecting surface 110 is formed in the center of the surface of the light guide main body A11 opposite to the light guide shaft portion A13. Further, both the protruding portions 105 and 107 also form a part of the light guide main body portion A11. On the other hand, the resin A2 is formed on a portion on the back surface side of the operation portion 101 on the surface of the light guide main body A11 on the light reflecting surface 110 side and a portion of substantially the entire surface of the light guide main body A11 on the shaft portion 111 side. It constitutes a portion of the shaft portion 111 excluding the light guide shaft portion A13 and a drip-proof recess 123.

端子ユニット１４０は、６本の金属板製の端子１４１を、略矩形状の成形樹脂製の第１端子保持部材１４３と、略四角棒状の第２端子保持部材１４４内にインサート成形して構成されている。各端子１４１はその途中の２か所でほぼ直角に屈曲することで、その一端は後方に向かって１列に６本突出し、他端は一側面側を向いて１列に６本突出している。 The terminal unit 140 is configured by insert molding six metal plate terminals 141 into a substantially rectangular first terminal holding member 143 made of molded resin and a substantially square bar-shaped second terminal holding member 144. ing. Each terminal 141 is bent at two points in the middle at a substantially right angle, so that one end thereof protrudes rearward in a row of six and the other end protrudes toward one side surface in a row of six. ..

回路基板１６０は、硬質で略矩形状の板からなる絶縁基板１６１の所定位置に、円形の貫通する挿通部１６３を設け、この挿通部１６３の周囲の回転つまみ１００を向く面側に、前記摺動子１３０の接点部１３５を摺接させる摺接パターン１６５を形成し、また絶縁基板１６１の後方の外周辺近傍に一列に前記端子１４１の一端を挿入する６つの小孔からなる端子挿入孔１６７を形成し、また絶縁基板１６１の前記摺接パターン１６５を設けた反対の面側の所定位置に発光素子１６９と他の各種電子部品１７１とを取り付け、さらに前記ケース２０の各基板ガイド部３５に対向する位置にこれらを挿入する小孔からなるガイド部１７３を形成して構成されている。絶縁基板１６１上には、図示しない回路パターンが形成されており、前記摺接パターン１６５や発光素子１６９や各種電子部品１７１や前記端子挿入孔１６７に取り付けられる端子１４１間を電気的に接続する。摺接パターン１６５としては、スイッチパターンや抵抗体パターン等の種々のパターンが適用できる。 The circuit board 160 is provided with a circular penetrating insertion portion 163 at a predetermined position of an insulating substrate 161 made of a hard and substantially rectangular plate, and the sliding portion 163 is provided on the surface side facing the rotary knob 100 around the insertion portion 163. A terminal insertion hole 167 consisting of six small holes for forming a sliding contact pattern 165 for sliding contact with the contact portion 135 of the mover 130 and inserting one end of the terminal 141 in a row near the outer periphery behind the insulating substrate 161. The light emitting element 169 and various other electronic components 171 are attached to a predetermined position on the opposite surface side of the insulating substrate 161 provided with the sliding contact pattern 165, and further attached to each substrate guide portion 35 of the case 20. A guide portion 173 composed of small holes for inserting these into the facing positions is formed and configured. A circuit pattern (not shown) is formed on the insulating substrate 161 to electrically connect the sliding contact pattern 165, the light emitting element 169, various electronic components 171 and the terminals 141 attached to the terminal insertion holes 167. As the sliding contact pattern 165, various patterns such as a switch pattern and a resistor pattern can be applied.

導光体１９０は、透明な合成樹脂を、回路基板１６０側の面が解放された略矩形箱型に一体成形して構成されている。図８，図９は、それぞれ導光体１９０を拡大して別の角度から見た斜視図である。これらの図に示すように、導光体１９０の回路基板１６０側を向く面は凹状の基板収納部１９１となっており、その底面の所定位置から円柱状の光導出部１９３が突出している。基板収納部１９１は、前記回路基板１６０全体を収納して覆う形状に形成されていて、その外周側壁の内周面の根元にはこれを囲むように、段状の基板当接面１９２が形成されている。また導光体１９０の外周側壁の先端面は、その全体が同一平面とされた外周先端面１９４となっている。光導出部１９３は前記回路基板１６０の挿通部１６３に挿入できる寸法に形成されており、その先端面は光出射面１９５となっている。光出射面１９５は円形の平面状に形成されており、前記回転つまみ１００の光入射面１１７と同一の外径寸法に形成されている。また導光体１９０の第３カバー３００側の外周面（前面）も光出射面１９７となっている。また、導光体１９０の第１カバー２２０側の面（背面）には、光出射面１９５，１９７方向に光を反射させる光反射面１９９と、この導光体１９０の背面上を伝って、コネクタ部２０Ｄ側に液体や蒸気が浸入するのを防止する排水ガイド突起２０５が形成されている。光反射面１９９は、導光体１９０の背面のほぼ中央（前記回路基板１６０に取り付けた発光素子１６９に対向する位置）に形成される複数の傾斜面（水平面も含む）によって形成されており、発光素子１６９から発射されて導光体１９０内に導入された光を、光出射面１９５と光出射面１９７に向けて反射する形状に形成されている。 The light guide body 190 is formed by integrally molding a transparent synthetic resin into a substantially rectangular box shape in which the surface on the circuit board 160 side is open. 8 and 9 are perspective views of the light guide body 190 as viewed from different angles. As shown in these figures, the surface of the light guide body 190 facing the circuit board 160 side is a concave substrate storage portion 191, and a columnar light lead-out portion 193 projects from a predetermined position on the bottom surface thereof. The substrate accommodating portion 191 is formed in a shape that accommodates and covers the entire circuit board 160, and a stepped substrate contact surface 192 is formed at the base of the inner peripheral surface of the outer peripheral side wall thereof so as to surround the substrate accommodating portion 191. Has been done. Further, the tip surface of the outer peripheral side wall of the light guide body 190 is an outer peripheral tip surface 194 whose entire surface is the same plane. The optical lead-out portion 193 is formed to have a size that allows it to be inserted into the insertion portion 163 of the circuit board 160, and its front end surface is a light emission surface 195. The light emitting surface 195 is formed in a circular planar shape, and is formed to have the same outer diameter as the light incident surface 117 of the rotary knob 100. Further, the outer peripheral surface (front surface) of the light guide body 190 on the third cover 300 side is also a light emitting surface 197. Further, on the surface (rear surface) of the light guide body 190 on the first cover 220 side, a light reflecting surface 199 that reflects light in the light emitting surfaces 195 and 197 directions and a light reflecting surface 199 that propagates on the back surface of the light guide body 190. A drainage guide protrusion 205 is formed on the connector portion 20D side to prevent liquid or steam from entering. The light reflecting surface 199 is formed by a plurality of inclined surfaces (including a horizontal plane) formed at substantially the center of the back surface of the light guide body 190 (position facing the light emitting element 169 attached to the circuit board 160). The light emitted from the light emitting element 169 and introduced into the light guide body 190 is formed in a shape of being reflected toward the light emitting surface 195 and the light emitting surface 197.

排水ガイド突起２０５は、長尺な線状の突起であり、導光体１９０の背面の後方の一方の角部付近に形成され、この角部の両側の辺にわたって、この角部を他の部分から仕切るように（分離するように）、形成されている。また前記ケース２０の両側壁部２０Ｂ、２０Ｃに対向する導光体１９０の左右両外周面（側面）であって、前記光出射面１９７に近い側の部分からは、一対の防滴用張り出し部２０１が腕状に突出している。防滴用張り出し部２０１は、矩形状の平板であって、導光体１９０の左右両外側面からほぼ垂直外方に向けて突出している。防滴用張り出し部２０１は導光体１９０に接続されるその一辺が、導光体１９０の外側面の幅（厚み）と同一幅を有していてその幅方向を向いており、従って前記導光体１９０の外側面の上下まで至っている。また導光体１９０の基板収納部１９１の底面の、前記ケース２０の各基板ガイド部３５に対向する位置には、これらを挿入する有底の小穴からなるガイド部挿入部２０３が形成されている。 The drainage guide protrusion 205 is a long linear protrusion, which is formed near one corner behind the back surface of the light guide 190, and extends over both sides of this corner to the other portion. It is formed so as to partition (separate) from. Further, a pair of drip-proof overhanging portions are formed from the left and right outer peripheral surfaces (side surfaces) of the light guide body 190 facing the side wall portions 20B and 20C of the case 20 and close to the light emitting surface 197. 201 protrudes like an arm. The drip-proof overhanging portion 201 is a rectangular flat plate, and protrudes substantially vertically outward from both the left and right outer surfaces of the light guide body 190. One side of the drip-proof overhanging portion 201 connected to the light guide body 190 has the same width (thickness) as the width (thickness) of the outer surface of the light guide body 190 and faces the width direction. It reaches above and below the outer surface of the light body 190. Further, at a position on the bottom surface of the substrate storage portion 191 of the light guide body 190 facing each substrate guide portion 35 of the case 20, a guide portion insertion portion 203 composed of bottomed small holes into which these are inserted is formed. ..

第１カバー２２０は、非透明な合成樹脂を略平板矩形状に成形して構成されており、前記ケース２０の第１収納部２５を略覆う外形形状に形成されている。第１カバー２２０の上下両側辺からは、ケース２０側に向けて一対の係止爪２２１を突出している。係止爪２２１は平板状であり、その先端近傍の両外側位置に爪部２２３を設けている。また第１カバー２２０の前面側の辺（前端辺）は、略Ｖ字状に形成され、その両端部分には直線部分が形成されている。この第１カバー２２０の前端辺は、ケース２０側に向けて適宜突出しているが、その突出形状は、第１収納部２５内に収納される導光体１９０の上面の形状に合わせてこれらに当接する形状に形成されている。また第１カバー２２０の前面側付近のケース２０側を向く面には、前記ケース２０の凹部３９に挿入される形状のガイド突起２２５と、前記ケース２０の挿入部４１に挿入される形状のガイド突起２２７が形成されている。 The first cover 220 is formed by molding a non-transparent synthetic resin into a substantially flat plate rectangular shape, and is formed in an outer shape that substantially covers the first storage portion 25 of the case 20. A pair of locking claws 221 project from the upper and lower sides of the first cover 220 toward the case 20 side. The locking claw 221 has a flat plate shape, and claw portions 223 are provided at both outer positions near the tip thereof. Further, the front side side (front end side) of the first cover 220 is formed in a substantially V shape, and straight lines are formed at both ends thereof. The front end side of the first cover 220 appropriately protrudes toward the case 20 side, and the protruding shape thereof matches the shape of the upper surface of the light guide body 190 housed in the first storage portion 25. It is formed in a shape that abuts. Further, on the surface of the first cover 220 near the front surface side facing the case 20, a guide protrusion 225 having a shape inserted into the recess 39 of the case 20 and a guide having a shape inserted into the insertion portion 41 of the case 20. The protrusion 227 is formed.

パッキン２５０は、エラストマー等の弾性体を、横断面円形で略矩形のリング状に形成し、３辺を直線状に、もう１つの辺を円弧状に湾曲した形状として構成されている。 The packing 250 is formed by forming an elastic body such as an elastomer in a ring shape having a circular cross section and a substantially rectangular shape, with three sides linearly curved and the other side curved in an arc shape.

第３カバー３００は、合成樹脂の成形品であり、ケース２０側が解放された略矩形箱型に成形して構成されており、これによって収納部３０１を形成している。第３カバー３００の前面（以下「化粧面」という）３０３の前記回転つまみ１００に対向する位置には、回転つまみ１００の操作部１０１の一部を露出する開口３０５が形成され、また前記導光体１９０の光出射面１９７に対向する位置には、照光部３０７が形成されている。照光部３０７は、第３カバー３００を構成する透明な成形樹脂の表面に塗布した不透光性の塗装を、所望の文字や記号等の形状にレーザー等によって切り欠くことで形成されているが、他の種々の方法によって形成しても良い。第３カバー３００の対向する上下両側面の所定位置には、それぞれ前記ケース２０の係止部３０に係止される矩形状の貫通孔からなる被係止部３０９が形成されている。 The third cover 300 is a molded product of synthetic resin, and is formed by molding into a substantially rectangular box shape in which the case 20 side is open, thereby forming the storage portion 301. An opening 305 that exposes a part of the operation portion 101 of the rotary knob 100 is formed at a position of the front surface (hereinafter referred to as “decorative surface”) 303 of the third cover 300 facing the rotary knob 100, and the light guide is provided. An illuminated portion 307 is formed at a position facing the light emitting surface 197 of the body 190. The illuminated portion 307 is formed by cutting out a translucent coating applied to the surface of the transparent molding resin constituting the third cover 300 into a desired shape such as a character or a symbol by a laser or the like. , May be formed by various other methods. Locked portions 309 formed of rectangular through holes locked to the locking portions 30 of the case 20 are formed at predetermined positions on both upper and lower surfaces of the third cover 300 facing each other.

次に、回転式電子部品１を組み立てるには、まず予め、回転つまみ１００の防滴用凹部１２３内に、防滴用のグリスＧ（図３参照）を充填し、且つこの回転つまみ１００に一対の摺動子１３０を取り付けておく。一方、端子ユニット１４０の側方に向かって突出する各端子１４１の先端を、回路基板１６０の各端子挿入孔１６７に挿入し、その反対側において回路基板１６０上の回路パターンに半田によって固定しておく。 Next, in order to assemble the rotary electronic component 1, first, the drip-proof recess 123 of the rotary knob 100 is filled with the drip-proof grease G (see FIG. 3), and the rotary knob 100 is paired with the rotary knob 100. Slider 130 is attached. On the other hand, the tip of each terminal 141 protruding toward the side of the terminal unit 140 is inserted into each terminal insertion hole 167 of the circuit board 160, and fixed to the circuit pattern on the circuit board 160 on the opposite side by soldering. deep.

そして、ケース２０の第２収納部２３内に、前記摺動子１３０を取り付け且つコイルバネ１２５とクリック用ボール１２７をクリック機構収納部１２４に収納した回転つまみ１００を収納し、その際、回転つまみ１００の軸部１１１を、ケース２０の軸受部２１内に回動自在に挿入し、軸支する。このとき、回転つまみ１００のグリスＧを充填した防滴用凹部１２３内に、ケース２０の軸受部２１が挿入されることで、防滴処理部が形成される。次に、前記回転つまみ１００の側面を覆うように、第２カバー７０を取り付け、係止爪７７の爪部７９をケース２０の被係止部２７に係止し、これによって回転つまみ１００を挟んだ状態で第２カバー７０をケース２０に取り付ける。このとき、第２カバー７０のつまみ支持部７３が回転つまみ１００の側面を覆い、その突出部７５が回転つまみ１００の挿入部１０９に挿入される。このときの状態を、図１０に示す。但し図１０ではさらにパッキン２５０を装着した状態を示しているが、この実施形態では下記するようにパッキン２５０は第３カバー３００側に装着する（この段階で装着しても良い）。図１０からも明らかなように、摺動子１３０は、ケース２０の挿通部２２内から、基部２０Ａの第１収納部２５側に露出する。 Then, the rotary knob 100 having the slider 130 attached and the coil spring 125 and the click ball 127 stored in the click mechanism storage portion 124 is stored in the second storage portion 23 of the case 20, and at that time, the rotary knob 100 is stored. The shaft portion 111 of the above is rotatably inserted into the bearing portion 21 of the case 20 to support the shaft. At this time, the bearing portion 21 of the case 20 is inserted into the drip-proof recess 123 filled with the grease G of the rotary knob 100 to form the drip-proof treatment portion. Next, a second cover 70 is attached so as to cover the side surface of the rotary knob 100, and the claw portion 79 of the locking claw 77 is locked to the locked portion 27 of the case 20, thereby sandwiching the rotary knob 100. In this state, the second cover 70 is attached to the case 20. At this time, the knob support portion 73 of the second cover 70 covers the side surface of the rotary knob 100, and the protruding portion 75 is inserted into the insertion portion 109 of the rotary knob 100. The state at this time is shown in FIG. However, although FIG. 10 shows a state in which the packing 250 is further attached, in this embodiment, the packing 250 is attached to the third cover 300 side (may be attached at this stage) as described below. As is clear from FIG. 10, the slider 130 is exposed from the inside of the insertion portion 22 of the case 20 to the first storage portion 25 side of the base portion 20A.

次に、前記端子ユニット１４０を取り付けた回路基板１６０と導光体１９０とを、ケース２０の第１収納部２５内に収納し、さらにその上から第１カバー２２０を被せる。そして第１カバー２２０の各爪部２２３を、ケース２０の各被係止部２９に係止する。このときケース２０の一対の基板ガイド部３５が、回路基板１６０の各ガイド部１７３を貫通して更に導光体１９０の各ガイド部挿入部２０３に挿入され、これら各部材が位置決めされる。またこのとき、第１カバー２２０のガイド突起２２５がケース２０の凹部３９に挿入され、第１カバー２２０のガイド突起２２７がケース２０の挿入部４１に挿入される。このときの状態を、図１１に示す（但し、このときは図１１に示すパッキン２５０は装着されていない）。このとき、回路基板１６０を収納した導光体１９０は、その外周の外周先端面１９４がケース２０の基部２０Ａに当接することで、回路基板１６０を囲む空間は防滴され、回路基板１６０への液体の浸入が防止される。またこのとき、導光体１９０の光出射面１９７側の部分は、ケース２０の基部２０Ａと第１カバー２２０の間に形成される開口部Ｋ（図１０に示す第１収納部２５の開口部Ｋ、但し図１０では第１カバー２２０を被せていないが、第１カバー２２０を被せて開口部Ｋが形成される）に露出し、さらに導光体１９０の前記一対の防滴用張り出し部２０１は、前記開口部Ｋの内周縁よりも外方に向けて延出している。 Next, the circuit board 160 to which the terminal unit 140 is attached and the light guide body 190 are housed in the first storage portion 25 of the case 20, and the first cover 220 is further covered from above. Then, each claw portion 223 of the first cover 220 is locked to each locked portion 29 of the case 20. At this time, the pair of board guide portions 35 of the case 20 penetrate each guide portion 173 of the circuit board 160 and are further inserted into each guide portion insertion portion 203 of the light guide body 190, and these members are positioned. At this time, the guide protrusion 225 of the first cover 220 is inserted into the recess 39 of the case 20, and the guide protrusion 227 of the first cover 220 is inserted into the insertion portion 41 of the case 20. The state at this time is shown in FIG. 11 (however, at this time, the packing 250 shown in FIG. 11 is not attached). At this time, in the light guide body 190 accommodating the circuit board 160, the outer peripheral tip surface 194 of the outer periphery thereof abuts on the base 20A of the case 20, so that the space surrounding the circuit board 160 is drip-proof and the circuit board 160 is contacted. The ingress of liquid is prevented. At this time, the portion of the light guide body 190 on the light emitting surface 197 side is an opening K formed between the base 20A of the case 20 and the first cover 220 (the opening of the first storage portion 25 shown in FIG. 10). K, however, in FIG. 10, the first cover 220 is not covered, but the first cover 220 is covered to form the opening K), and the pair of drip-proof overhangs 201 of the light guide body 190 are further exposed. Extends outward from the inner peripheral edge of the opening K.

またこのとき、回路基板１６０の摺接パターン１６５には、摺動子１３０の接点部１３５が当接する。また、端子ユニット１４０は、端子ユニット収納部３１内に収納される。またこのとき、導光体１９０は回路基板１６０を覆っていて且つ回路基板１６０の発光素子１６９を設置した側の面の外周部分は導光体１９０の基板当接面１９２に当接している。また導光体１９０の光導出部１９３は、回路基板１６０の挿通部１６３に挿入され、その先端の光出射面１９５は回転つまみ１００の光入射面１１７に接近して対向している。 At this time, the contact portion 135 of the slider 130 comes into contact with the sliding contact pattern 165 of the circuit board 160. Further, the terminal unit 140 is housed in the terminal unit storage unit 31. At this time, the light guide body 190 covers the circuit board 160, and the outer peripheral portion of the surface of the circuit board 160 on the side where the light emitting element 169 is installed is in contact with the substrate contact surface 192 of the light guide body 190. Further, the light lead-out portion 193 of the light guide body 190 is inserted into the insertion portion 163 of the circuit board 160, and the light emission surface 195 at the tip thereof approaches and faces the light incident surface 117 of the rotary knob 100.

次に、パッキン２５０を、第３カバー３００のケース本体収納部３０１内に挿入して、第３カバー３００の開口３０５の裏側を囲む位置に設けたパッキン搭載面３１１（図３参照）に当接・設置する（図１１ではパッキン２５０をケース２０側に取り付けた状態を示しているが、この例の場合は第３カバー３００側にまず装着する）。そして、このパッキン２５０を取り付けた第３カバー３００を、前記ケース２０の回転つまみ１００を露出する側の部分に、その上から被せるように取り付ける。その際、各係止部３０を、第３カバー３００の各被係止部３０９に係止し、これによって図１、図２に示す回転式電子部品１の組み立てが完了する。なお上記組立手順はその一例であり、他の各種異なる組立手順を用いて組み立てても良いことはいうまでもない。 Next, the packing 250 is inserted into the case body storage portion 301 of the third cover 300 and abuts on the packing mounting surface 311 (see FIG. 3) provided at a position surrounding the back side of the opening 305 of the third cover 300. -Install (Fig. 11 shows the state where the packing 250 is attached to the case 20 side, but in this example, it is first attached to the third cover 300 side). Then, the third cover 300 to which the packing 250 is attached is attached so as to cover the portion of the case 20 on the exposed side of the rotary knob 100 so as to cover it. At that time, each locking portion 30 is locked to each locked portion 309 of the third cover 300, whereby the assembly of the rotary electronic component 1 shown in FIGS. 1 and 2 is completed. The above assembly procedure is an example thereof, and it goes without saying that the assembly may be performed using various other different assembly procedures.

このとき、図１，図２に示すように、回転つまみ１００の操作部１０１の一部は、開口３０５から露出する。また第３カバー３００の照光部３０７の裏面に対向する位置に、導光体１９０の光出射面１９７が配置される。またこのとき、パッキン２５０は、第３カバー３００のパッキン搭載面３１１と、前記ケース２０及び第２カバー７０のパッキン搭載面３３（３３ａ～３３ｃ），８１との間で挟持され、密閉される。 At this time, as shown in FIGS. 1 and 2, a part of the operation unit 101 of the rotary knob 100 is exposed from the opening 305. Further, the light emitting surface 197 of the light guide body 190 is arranged at a position facing the back surface of the illuminated portion 307 of the third cover 300. At this time, the packing 250 is sandwiched and sealed between the packing mounting surface 311 of the third cover 300 and the packing mounting surfaces 33 (33a to 33c) and 81 of the case 20 and the second cover 70.

以上のようにして組み立てられた回転式電子部品１において、回転つまみ１００を回転すると、摺動子１３０の接点部１３５が回路基板１６０の摺接パターン１６５上を摺動し、これによって各端子１４１間の検出出力が変化する。 In the rotary electronic component 1 assembled as described above, when the rotary knob 100 is rotated, the contact portion 135 of the slider 130 slides on the sliding contact pattern 165 of the circuit board 160, whereby each terminal 141. The detection output during that time changes.

一方、発光素子１６９を発光すれば、その光は図３に一点鎖線で示すように、導光体１９０内に導入される。導光体１９０内に導入された光の一部は、光反射面１９９で反射されることで前記光出射面１９７に向かい、その面から放出され、前記第３カバー３００の照光部３０７をその裏面側から明るく照らし出す。一方、発光素子１６９から導光体１９０内に導入された光の一部は、光反射面１９９で反射されることで、前記光出射面１９５に向かい、その面から放出され、回転つまみ１００の光入射面１１７からつまみ用導光部Ａ１内に導入される。つまみ用導光部Ａ１内に導入された光は、導光軸部Ａ１３内を進み、光反射面１１０等で反射されることで、導光本体部Ａ１１内を進み、操作部１０１の外周面に導かれ、操作部１０１を明るく照らし出す。 On the other hand, when the light emitting element 169 emits light, the light is introduced into the light guide body 190 as shown by the alternate long and short dash line in FIG. A part of the light introduced into the light guide body 190 is reflected by the light reflecting surface 199 toward the light emitting surface 197, and is emitted from the surface, and the illuminated portion 307 of the third cover 300 is used. Brightly illuminate from the back side. On the other hand, a part of the light introduced into the light guide body 190 from the light emitting element 169 is reflected by the light reflecting surface 199 and directed toward the light emitting surface 195, and is emitted from the surface of the rotary knob 100. It is introduced into the light guide unit A1 for a knob from the light incident surface 117. The light introduced into the light guide portion A1 for the knob travels inside the light guide shaft portion A13 and is reflected by the light reflecting surface 110 or the like, so that it travels inside the light guide main body portion A11 and the outer peripheral surface of the operation unit 101. Guided by, the operation unit 101 is illuminated brightly.

一方、この回転式電子部品１は、図示しない電子機器の操作パネルに装着され、その際、第３カバー３００の化粧面３０３が、操作パネルの外部に露出する。そしてこの操作パネルの外部に露出した化粧面３０３に液体や蒸気がかかることがある。かかった液体は、第３カバー３００の開口３０５からその内部に浸入するが、浸入した液体は、パッキン２５０によって、その内側への浸入が阻止される。しかし、かかった液体（特に蒸気、以下「蒸気等」という）の一部は、パッキン２５０による防水を通過して、基部２０Ａと第１カバー２２０の間の前方側に形成された開口部Ｋから第１収納部２５内に入り込むことがある。第１収納部２５内に蒸気等が入り込むと、入り込んだ蒸気等がさらに回路基板１６０の発光素子１６９等を設置した面（電子部品搭載面）側に入り込んで結露したり、その後方にある端子１４１に付着し結露して電気的な不具合を生じる虞がある。前記開口部Ｋから第１収納部２５内に入り込んだ蒸気等が回路基板１６０の電子部品搭載面や端子１４１に入り込む理由には以下のようなものがある。即ち、導光体１９０の外周先端面１９４は基部２０Ａの面に当接しているので、基本的には回路基板１６０の周囲は覆われ、前記開口部Ｋから入り込んだ蒸気等は導光体１９０の背面側に入っても、回路基板１６０の電子部品搭載面側には入ってこないが、前記導光体１９０の外周先端面１９４と基部２０Ａが当接している全周の内の所定部分に微細な隙間が生じていたような場合はその隙間から蒸気等が入り込む虞があり、また基部２０Ａの後方に設けた凹状の端子ユニット収納部３１上を導光体１９０の外周先端面１９４が通過する部分は密閉されていないので、この部分から回路基板１６０側や端子ユニット１４０側に蒸気等が入り込む虞がある。 On the other hand, the rotary electronic component 1 is attached to an operation panel of an electronic device (not shown), and at that time, the decorative surface 303 of the third cover 300 is exposed to the outside of the operation panel. Then, liquid or vapor may be applied to the decorative surface 303 exposed to the outside of the operation panel. The applied liquid penetrates into the inside through the opening 305 of the third cover 300, but the infiltrated liquid is prevented from entering into the inside by the packing 250. However, a part of the applied liquid (particularly steam, hereinafter referred to as "steam") passes through the waterproofing by the packing 250 and passes through the opening K formed on the front side between the base 20A and the first cover 220. It may get inside the first storage unit 25. When steam or the like enters the first storage unit 25, the vapor or the like that has entered further enters the surface (electronic component mounting surface) side of the circuit board 160 on which the light emitting element 169 or the like is installed to cause dew condensation, or a terminal behind the terminal. There is a risk that it will adhere to 141 and cause electrical problems due to dew condensation. The reasons why steam or the like that has entered the first storage portion 25 through the opening K enters the electronic component mounting surface of the circuit board 160 or the terminal 141 are as follows. That is, since the outer peripheral tip surface 194 of the light guide body 190 is in contact with the surface of the base portion 20A, the periphery of the circuit board 160 is basically covered, and the steam or the like that has entered through the opening K is the light guide body 190. Even if it enters the back side of the circuit board 160, it does not enter the electronic component mounting surface side of the circuit board 160, but it is located on a predetermined portion of the entire circumference where the outer peripheral tip surface 194 of the light guide body 190 and the base 20A are in contact with each other. If there is a minute gap, steam or the like may enter through the gap, and the outer peripheral tip surface 194 of the light guide body 190 passes over the concave terminal unit storage portion 31 provided behind the base 20A. Since the portion to be used is not sealed, there is a possibility that steam or the like may enter the circuit board 160 side or the terminal unit 140 side from this portion.

これに対して本実施形態の場合、例えば図１１に示すように、導光体１９０に、基部２０Ａと第１カバー２２０の間に形成される開口部Ｋの内周縁よりも外方に延出する防滴用張り出し部２０１を設けているので、前記開口部Ｋに浸入しようとする蒸気等の内の一部を外方、即ち図１１に矢印で示すように、開口部Ｋから離れる方向（ケース２０の両側壁部２０Ｂ、２０Ｃと第３カバー３００の間の隙間）に向けて誘導する（引き離す）ことができ、開口部Ｋへの浸入を防止（抑制）することができる。これによって回路基板１６０の電子部品搭載面や、その後方に位置する端子ユニット１４０への蒸気等の付着を抑制できる。しかも防滴用張り出し部２０１は導光体１９０の一部として形成されるので、部品点数が増加することはなく、構造も簡単である。 On the other hand, in the case of the present embodiment, for example, as shown in FIG. 11, the light guide body 190 extends outward from the inner peripheral edge of the opening K formed between the base portion 20A and the first cover 220. Since the drip-proof overhanging portion 201 is provided, a part of the steam or the like that is about to enter the opening K is outward, that is, in the direction away from the opening K as shown by an arrow in FIG. It can be guided (pulled apart) toward the side wall portions 20B and 20C of the case 20 and the third cover 300, and can prevent (suppress) intrusion into the opening K. As a result, it is possible to suppress the adhesion of steam or the like to the electronic component mounting surface of the circuit board 160 and the terminal unit 140 located behind the electronic component mounting surface. Moreover, since the drip-proof overhanging portion 201 is formed as a part of the light guide body 190, the number of parts does not increase and the structure is simple.

一方、防滴用張り出し部２０１によっても防止しきれずに、基部２０Ａと第１カバー２２０の間に形成される開口部Ｋから浸入した蒸気等の内、導光体１９０の背面側に浸入した蒸気等は、この背面に形成された排水ガイド突起２０５によって、所望の排水方向、即ちこの実施形態の場合はコネクタ部２０Ｄの設置位置から離れる方向にガイドされ、これによって効果的な防滴（端子ユニット収納部３１から浸入する蒸気等による端子１４１への液体の付着防止等）を図ることができる。なお蒸気等は、例えばケース２０の下側の側壁部２０Ｃに設けた被係止部２９の爪部２２３を係止した隙間から排出される。 On the other hand, among the steam that has entered from the opening K formed between the base 20A and the first cover 220, the steam that has entered the back side of the light guide body 190 cannot be completely prevented by the drip-proof overhanging portion 201. Etc. are guided by the drainage guide protrusion 205 formed on the back surface in a desired drainage direction, that is, in a direction away from the installation position of the connector portion 20D in the case of this embodiment, thereby effectively drip-proof (terminal unit). It is possible to prevent the liquid from adhering to the terminal 141 due to the vapor or the like infiltrating from the storage portion 31). Note that steam or the like is discharged from, for example, a gap in which the claw portion 223 of the locked portion 29 provided on the lower side wall portion 20C of the case 20 is locked.

以上本発明の実施形態を説明したが、本発明は上記実施形態に限定されるものではなく、特許請求の範囲、及び明細書と図面に記載された技術的思想の範囲内において種々の変形が可能である。なお直接明細書及び図面に記載がない何れの形状や構造や材質であっても、本願発明の作用・効果を奏する以上、本願発明の技術的思想の範囲内である。例えば、上記実施形態では、防滴用張り出し部を、導光体の左右両側から一対突出させたが、導光体の全周から突出させても良いし、他の一部から突出させても良い。全周から突出させれば、最も効果的に蒸気等の開口部への浸入を抑制できる。また排水ガイド突起を、コネクタの設置位置から離れる方向に導く形状に形成したが、コネクタ以外の所望の部分（例えば他の電気的な機能部）から離れる方向に導く形状に形成しても良い。また本発明は、回転式電子部品以外の各種電子部品に適用してもよい。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications may be made within the scope of claims and the technical ideas described in the specification and drawings. It is possible. It should be noted that any shape, structure or material not directly described in the specification or drawings is within the scope of the technical idea of the present invention as long as the action and effect of the present invention are exhibited. For example, in the above embodiment, a pair of drip-proof overhanging portions are projected from the left and right sides of the light guide body, but the light guide body may be projected from the entire circumference or may be projected from other parts. good. If it is projected from the entire circumference, it is possible to most effectively suppress the infiltration of steam or the like into the opening. Further, although the drainage guide protrusion is formed in a shape that guides the drainage guide protrusion in a direction away from the installation position of the connector, it may be formed in a shape that guides the drainage guide protrusion in a direction away from a desired portion other than the connector (for example, another electrical functional part). Further, the present invention may be applied to various electronic components other than rotary electronic components.

また、上記記載及び各図で示した実施形態は、その目的及び構成等に矛盾がない限り、互いの記載内容を組み合わせることが可能である。また、上記記載及び各図の記載内容は、その一部であっても、それぞれ独立した実施形態になり得るものであり、本発明の実施形態は上記記載及び各図を組み合わせた一つの実施形態に限定されるものではない。 In addition, the above description and the embodiments shown in each figure can be combined with each other as long as there is no contradiction in the purpose, configuration, and the like. Further, the above description and the description contents of each figure can be independent embodiments even if they are a part thereof, and the embodiment of the present invention is one embodiment in which the above description and each figure are combined. Not limited to.

１回転式電子部品（電子部品）
２０ケース
２０Ａ基部
２０Ｄコネクタ部（コネクタ）
２５第１収納部（収納部）
１６０回路基板
１６９発光素子
１９０導光体
１９４外周先端面
１９５，１９７光出射面
２０１防滴用張り出し部
２０５排水ガイド突起
２２０第１カバー（カバー）
Ｋ開口部
1 Rotary electronic components (electronic components)
20 Case 20A Base 20D Connector (Connector)
25 First storage section (storage section)
160 Circuit board 169 Light emitting element 190 Light guide body 194 Outer peripheral tip surface 195, 197 Light emitting surface 201 Drip-proof overhang part 205 Drainage guide protrusion 220 First cover (cover)
K opening

Claims

A case with a storage section on one side,
The circuit board stored in the storage part of the case and
A light guide that is installed on the circuit board and introduces light emitted from a light emitting element attached to the circuit board and emits light from a light emitting surface provided at a desired position.
A cover that covers the storage unit that houses the circuit board and the light guide,
It is an electronic component that has
A drainage guide protrusion for guiding the liquid flowing through the back surface in the drainage direction is provided on the back surface of the light guide body facing the cover side.
The drainage guide protrusion is formed in a shape that partitions the corner portion from the other portion by reaching both sides of the corner portion on the opposite surface side provided with the light emitting surface of the light guide body. The drip-proof structure of electronic parts is characterized by that.

The drip-proof structure of the electronic component according to claim 1.
The drainage guide protrusion is an electronic component characterized in that it is formed in a shape that guides a liquid traveling on the back surface of the light guide body in a direction away from the installation position of a connector electrically connected to the circuit board. Drip-proof structure.

The drip-proof structure of the electronic component according to claim 1 or 2.
The case is provided with a locked portion for locking and attaching the claw portion of the cover.
The installation position of the locked portion is characterized in that the liquid guided in the draining direction by the drain guide protrusion is discharged from the gap where the locked portion and the claw portion of the cover are locked. Drip-proof structure of electronic parts.