JP3765545B2

JP3765545B2 - Seesaw type switch

Info

Publication number: JP3765545B2
Application number: JP34781895A
Authority: JP
Inventors: 良則服部
Original assignee: Tokai Rika Co Ltd
Current assignee: Tokai Rika Co Ltd
Priority date: 1995-12-16
Filing date: 1995-12-16
Publication date: 2006-04-12
Anticipated expiration: 2015-12-16
Also published as: JPH09167543A

Description

【０００１】
【発明の属する技術分野】
本発明は操作部材としてノブをスイッチケース内部から照明するシーソ型スイッチに関し、特に簡単な構造で洩光を防止することができるシーソ型スイッチに関する。
【０００２】
【従来の技術およびその課題】
従来の照明を有するシーソ型スイッチの一例の構成を図５に示す。函形のスイッチケース１は部材２に取付けられ、その内部には照明用の光源３が配置されている。スイッチケースには部材２に対向する面に、内側が光を導く通路となるノブ取付部４が一体成形により突設されている。ノブ取付部４の対向する両側には回転軸５が突出して同心上に一体成形されている。
ノブ６はノブ取付部４に嵌め込まれる嵌合部７を有し、この嵌合部７を形成する側部にノブ取付部の回転軸５の軸孔６ａが形成されている。そして、ノブ６をノブ取付部４に装着したとき、回転軸５が軸孔６ａに嵌合し、ノブ６はノブ取付部に揺動自在に支持される。ノブを操作すると、ノブの揺動に応じてスイッチケース内に配置されたスイッチが動作する。またノブ６を押圧する側の面には光を透過する指標が設けられており、光源３からの照明光が指標を透過して外部に出射し、指標を視認することができる。
スイッチケース１は金型一体成形で作製されているので、ノブ取付部４の外側に回転軸５を設けるとき、この部分をスイッチケース内側から移動型で成形しなければならない。そのため、スイッチケースのノブ取付部側には金型を抜くための孔部が成形時に形成される。
この孔部を通して、ノブの照明光が外部に洩れるため、孔部を別部品によって閉塞し、洩光を防止していた。その結果部品点数とその組付け工数が増加するとともに、構造が複雑になるという問題があった。
本発明の目的は成形が容易でかつ簡単な構造で洩光を防止することができるシーソ型スイッチを提供することにある。
【０００３】
【課題を解決するための手段】
上記の目的を達成するため、本発明に係るシーソ型スイッチはスイッチを操作するノブを揺動可能に取り付ける回転軸が外側に突出形成されるノブ取付部とケース内部に光源が配置されるスイッチケースとを金型一体成形によって作製されており、ノブ取付部の基部には、回転軸の金型一体成形時に形成される型抜き孔が孔部としてスイッチケースの表面に開口し、該孔部の開口を囲むようにして壁部がスイッチケースとノブ取付部とに一体形成されており、孔部の開口が回転軸の軸心に対して直交するよう対向されていると共に、回転軸に取り付けるノブの軸孔の周囲には下端面が半円形の対向面に形成された遮光部を設け、一方壁部には回転軸の軸心に直交するよう対向している上端面が遮光部の対向面の半円形に合致した形状に形成されており、ノブの軸孔を回転軸に嵌合したとき、ノブに形成された遮光部の対向面が壁部の上端面に近接して配置され、光源の孔部からの漏光を遮蔽することを特徴としている。
本発明によれば、回転軸の金型一体成形時に形成される型抜き孔が孔部としてスイッチケースの表面に開口し、該孔部の開口を囲むようにして壁部がスイッチケースとノブ取付部とに一体形成され、ノブの軸孔を回転軸に嵌合したとき、ノブに形成された遮光部の対向面が壁部の上端面に近接して配置されるので、孔部からノブの照明光の洩光が防止される。
【０００４】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づいて説明する。図１乃至４に一つの実施形態の構成を示す。各図において、図５に示す従来の部分に対応する部分には同一の符号を付しており、その説明は適宜省略する。
スイッチを操作するノブ６を揺動可能に取り付ける回転軸５が外側に突出形成されるノブ取付部４とケース内部に光源３が配置されるスイッチケース１とを金型一体成形によって作製されている。ノブ取付部４の基部には回転軸５の金型一体成形時に形成される型抜き孔が孔部１ａとしてスイッチケース１の表面に開口し、該孔部１ａの開口を囲むようにして壁部１１がスイッチケース１とノブ取付部４とに一体形成されている。孔部１ａの開口が回転軸５の軸心に対して直交するよう対向されている。回転軸５に取り付けるノブ６の軸孔６ａの周囲には下端面が凸状の半円形の対向面１２ａに形成された遮光部１２が設けられている。壁部１１には回転軸５の軸心に直交するよう対向している上端面１１ａが遮光部１２の対向面１２ａの凸状の半円形に合致した形状に形成されている。従って、スイッチケースとノブの回転軸を一体成形したときに設けられる孔部１ａはノブ６をスイッチケース１に組み付けることにより、ノブ６の遮光部１２によって閉塞されるため、光源３から発する光が孔部１ａを通って外部に洩れることが防止できる。
【図面の簡単な説明】
【図１】本発明のシーソ型スイッチの１つの実施形態の構成する分解斜視図である。
【図２】図１のＡ−Ａ線断面図である。
【図３】図１の組立時の外形を示す側面図である。
【図４】図３のＢ−Ｂ線断面図である。
【図５】従来のシーソ型スイッチの一例の構成を示す縦断面図である。
【符号の説明】
１…スイッチケース、１ａ…孔部、３…光源、４…ノブ取付部、５…回転軸、６…ノブ、１１…壁部、１１ａ…ノブ受け面、１２…遮光部、１２ａ…対向面[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seesaw type switch that illuminates a knob as an operation member from the inside of a switch case, and more particularly to a seesaw type switch that can prevent light leakage with a simple structure.
[0002]
[Prior art and problems]
A configuration of an example of a seesaw type switch having a conventional illumination is shown in FIG. The box-shaped switch case 1 is attached to a member 2, and a light source 3 for illumination is disposed inside the case. The switch case is provided with a knob mounting portion 4 on the surface facing the member 2 so as to protrude from the inside by integral molding. Rotating shafts 5 protrude from both opposing sides of the knob mounting portion 4 and are integrally formed concentrically.
The knob 6 has a fitting portion 7 fitted into the knob attaching portion 4, and a shaft hole 6 a of the rotary shaft 5 of the knob attaching portion is formed on a side portion forming the fitting portion 7. When the knob 6 is mounted on the knob mounting portion 4, the rotary shaft 5 is fitted into the shaft hole 6a, and the knob 6 is supported by the knob mounting portion so as to be swingable. When the knob is operated, a switch arranged in the switch case is operated in accordance with the swing of the knob. In addition, an indicator that transmits light is provided on the surface on the side where the knob 6 is pressed, and illumination light from the light source 3 passes through the indicator and is emitted to the outside so that the indicator can be visually recognized.
Since the switch case 1 is manufactured by die-molding, when the rotary shaft 5 is provided outside the knob mounting portion 4, this portion must be molded from the inside of the switch case with a movable mold. Therefore, a hole for removing the mold is formed on the knob mounting portion side of the switch case at the time of molding.
Since the illumination light of the knob leaks to the outside through the hole, the hole is blocked by another part to prevent light leakage. As a result, there is a problem that the number of parts and the number of assembling steps increase and the structure becomes complicated.
An object of the present invention is to provide a seesaw type switch that can be easily molded and can prevent light leakage with a simple structure.
[0003]
[Means for Solving the Problems]
In order to achieve the above object, the seesaw type switch according to the present invention is a switch case in which a rotating shaft that pivotably mounts a knob for operating the switch is formed to protrude outward, and a light source is disposed inside the case. And a die-cutting hole formed at the time of integral molding of the rotary shaft is opened as a hole on the surface of the switch case at the base of the knob mounting portion. A wall portion is formed integrally with the switch case and the knob mounting portion so as to surround the opening, the opening of the hole portion is opposed to be orthogonal to the axis of the rotating shaft, and the knob shaft attached to the rotating shaft A light-shielding portion having a lower end surface formed on a semicircular facing surface is provided around the hole, and an upper end surface facing the axis of the rotating shaft is orthogonal to the wall surface. Formed in a shape that matches the circle When the shaft hole of the knob is fitted to the rotating shaft, the opposing surface of the light shielding portion formed on the knob is arranged close to the upper end surface of the wall portion to shield light leakage from the hole portion of the light source It is characterized by.
According to the present invention, the punching hole formed at the time of integral molding of the rotating shaft opens as a hole on the surface of the switch case, and the wall portion surrounds the opening of the hole so that the switch case, the knob mounting portion, When the shaft shaft hole of the knob is fitted to the rotation shaft, the opposing surface of the light shielding portion formed on the knob is arranged close to the upper end surface of the wall portion, so that the illumination light of the knob is transmitted from the hole portion. Leakage of light is prevented.
[0004]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 show the configuration of one embodiment. In each figure, parts corresponding to those of the conventional part shown in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.
A knob mounting portion 4 in which a rotating shaft 5 for swingably mounting a knob 6 for operating a switch is formed to project outward and a switch case 1 in which a light source 3 is disposed inside the case are manufactured by integral molding. . At the base of the knob mounting portion 4, a punching hole formed at the time of integral molding of the rotary shaft 5 opens as a hole portion 1 a on the surface of the switch case 1, and a wall portion 11 surrounds the opening of the hole portion 1 a. The switch case 1 and the knob mounting portion 4 are integrally formed. The opening of the hole 1a is opposed so as to be orthogonal to the axis of the rotating shaft 5. Around the shaft hole 6a of the knob 6 attached to the rotary shaft 5, a light-shielding portion 12 formed on a semicircular facing surface 12a having a convex lower end surface is provided. The wall 11 is formed with an upper end surface 11 a facing the axis of the rotary shaft 5 so as to be perpendicular to the axis of the rotating shaft 5, so as to match the convex semicircular shape of the facing surface 12 a of the light shielding portion 12. Accordingly, the hole 1a provided when the switch case and the rotary shaft of the knob are integrally molded is closed by the light shielding portion 12 of the knob 6 when the knob 6 is assembled to the switch case 1, so that the light emitted from the light source 3 is emitted. Leakage to the outside through the hole 1a can be prevented.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of one embodiment of a seesaw type switch according to the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a side view showing the outer shape at the time of assembly in FIG. 1;
4 is a cross-sectional view taken along line BB in FIG.
FIG. 5 is a longitudinal sectional view showing a configuration of an example of a conventional seesaw type switch.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Switch case, 1a ... Hole part, 3 ... Light source, 4 ... Knob attachment part, 5 ... Rotating shaft, 6 ... Knob, 11 ... Wall part, 11a ... Knob receiving surface, 12 ... Shading part, 12a ... Opposite surface

Claims

A knob mounting portion in which a rotating shaft for swingably mounting a knob for operating a switch is formed to protrude outwardly and a switch case in which a light source is disposed inside the case are manufactured by die-molding, and the knob mounting portion In the base portion of the rotary shaft, a die-cut hole formed when the rotating shaft is integrally molded is opened as a hole portion on the surface of the switch case, and the wall portion is attached to the switch case and the knob so as to surround the opening of the hole portion. The opening of the hole is opposed so as to be orthogonal to the axis of the rotating shaft, and a lower end surface is formed around the shaft hole of the knob attached to the rotating shaft. A light-shielding portion formed on a semicircular facing surface is provided, while the upper end surface facing the axis of the rotating shaft is perpendicular to the semicircular shape of the facing surface of the light-shielding portion. Formed before and When the shaft hole of the knob is fitted to the rotating shaft, the opposing surface of the light shielding portion formed on the knob is disposed close to the upper end surface of the wall portion to shield light leakage from the hole portion of the light source. A seesaw-type switch characterized by