JP2005352399A - Irradiation angle variable electronic flash apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stabilize the operation of an electronic flash apparatus which makes an irradiation angle variable according to the focal length of a taking lens of camera. <P>SOLUTION: The electronic flash apparatus is mounted with a holding member having a light emitting section and a reflection parasol slidably with components of the camera and is made variable in the irradiation angle by the movement of the holding member. The holding member has a V-shaped groove disposed approximately parallel to the moving direction and is adapted to engage an elastic member having a plurality of projecting parts in the groove. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、カメラの撮影レンズの焦点距離に応じて照射角を可変とするストロボ装置の作動を安定させる構造に関するものである。   The present invention relates to a structure that stabilizes the operation of a strobe device that changes an irradiation angle according to the focal length of a photographing lens of a camera.

従来より、カメラのストロボ装置で、キセノン管と反射笠と、そのホルダーからなる発光部ユニットと、フレネルレンズを備えた前面パネルとの距離を変化させて、ストロボ光の照射角を可変とした、照射角可変ストロボ装置が知られている。特に、本出願人による、特開２００３−０２１８６１号公報に開示されているプリズムのような光学部材を用いたストロボ装置で、このようなストロボを構成しようとすると、その発光部ユニットと光学部材の位置関係の精度、ズーム作動時の間隔変化の精度を高精度に保たないと、照射角やガイドナンバーがばらつくと言う問題があった。この発光部ユニットと光学部材の位置精度を高める方法として、本出願人による特開２００３−０５７７３１号公報に開示されているような、ストロボ発光部をバーを用いて保持する方法が知られている。
特開２００３−０２１８６１号公報 特開２００３−０５７７３１号公報 Conventionally, in the strobe device of a camera, the distance between the xenon tube and the reflective shade, the light emitting unit consisting of its holder, and the front panel equipped with the Fresnel lens was changed to make the irradiation angle of strobe light variable. An irradiation angle variable strobe device is known. In particular, in a strobe device using an optical member such as a prism disclosed in Japanese Patent Application Laid-Open No. 2003-021861 by the present applicant, when such a strobe is configured, the light emitting unit and the optical member If the accuracy of the positional relationship and the accuracy of the interval change during zoom operation are not kept high, there is a problem that the irradiation angle and guide number vary. As a method for improving the positional accuracy of the light emitting unit and the optical member, a method of holding the strobe light emitting unit using a bar as disclosed in Japanese Patent Application Laid-Open No. 2003-057331 by the present applicant is known. .
JP 2003-021861 A JP 2003-057331 A

しかし、このようにバーを用いた従来の方式は、発光部ユニットのガタを除去するためにバーとの篏合部を長く取らなければならず、スペースを必要とする。また、発光部ユニットをズーム動作させる構造として、摺動するカム板に設けられたカム溝と、発光部ユニットから突出したピンとを係合させ、カム板を撮影レンズの作動に連動させて摺動させ、発光部ユニットと光学部材との間隔を変化させる構造が一般的だが、このピンとカム溝のガタで、発光部ユニットと光学部材との間隔が変化してしまうのを防ぐには、片寄せバネ等を備えなければならず、これもまたスペースを要し、カメラの小型化を阻む要因となっていた。   However, the conventional method using the bar as described above requires a long space with the bar in order to remove the play of the light emitting unit, and requires a space. Also, as a structure for zooming the light emitting unit, the cam groove provided on the sliding cam plate and the pin protruding from the light emitting unit are engaged, and the cam plate slides in conjunction with the operation of the photographic lens. In order to prevent the gap between the light emitting unit and the optical member from changing due to the backlash between the pin and the cam groove, it is generally necessary to shift the gap between the light emitting unit and the optical member. A spring or the like had to be provided, which also required space and hindered miniaturization of the camera.

本発明では、発光部と反射笠を備えた保持部材が、カメラの構成部材に摺動可能に取り付けられ、該保持部材の移動によって照射角を可変とするストロボ装置において、
該保持部材は、移動方向と略平行に設けられたＶ字状の溝を備え、該溝に複数の突起部を備えた弾性部材を係合させるようにしたことを特徴とする。 In the present invention, in the strobe device in which the holding member including the light emitting unit and the reflective shade is slidably attached to the constituent member of the camera and the irradiation angle is variable by the movement of the holding member.
The holding member includes a V-shaped groove provided substantially parallel to the moving direction, and an elastic member including a plurality of protrusions is engaged with the groove.

本発明によれば、板バネに設けた複数の突起部と、発光部のホルダーに設けたＶ字状の溝とを係合させると言う簡単な構造で、発光部ユニットと、光学部材の位置関係の精度、ズーム作動時の間隔変化の精度を高精度に保ちつつ、小型でスペースを要しない照射角可変ストロボ装置を提供できる。   According to the present invention, the light emitting unit and the position of the optical member have a simple structure in which a plurality of protrusions provided on the leaf spring and the V-shaped groove provided on the holder of the light emitting unit are engaged. It is possible to provide an irradiation angle variable strobe device that is small and does not require a space while maintaining high accuracy of the relationship and accuracy of interval change during zoom operation.

（実施例１）
図１乃至図４により、本発明の実施例を説明する。 Example 1
An embodiment of the present invention will be described with reference to FIGS.

図１は本発明のストロボ装置の背面斜視図、図２はその分解斜視図、図３及び図４はその断面を示すもので、１は発光部であるキセノン管、２は反射笠、３はホルダーで、キセノン管取り付けゴム４によって、キセノン管１と反射笠２はホルダー３に取り付けられて発光部ユニットを構成している。５は地板で、ホルダー３に４ヶ所設けられた足部３ａと、地板５に設けられたリブ部５ａとが係合することにより、ホルダー３は脱落することなく、前後方向に摺動可能に地板５に取り付けられている。６はライトガイドのような光学部材で、地板５の２個の突起部５ｂに取り付けられ、前述の発光部ユニットの発光光を集光する機能を有している。７はカム板で地板５の下面に設けられた足部５ｃと係合し、図横方向に摺動可能に取り付けられ、カム板７の上面には複数のカム溝７ａが形成され、ホルダー３のピン３ｂと係合し、カム板７が図横方向に摺動することによって、発光部ユニットが前後に摺動する構成となっている。８は板バネで、地板５の台座部５ｄにビス９で取り付けられ、その先端部には球状の突起部８ａが２個設けられており、取り付け状態で板バネ８は変形し、突起部８はホルダー３の後方のＶ字状の溝３ｃと係合しつつ、ホルダー３を図下面方向に押し付けている。   1 is a rear perspective view of the strobe device of the present invention, FIG. 2 is an exploded perspective view thereof, FIGS. 3 and 4 are cross-sectional views thereof, 1 is a xenon tube as a light emitting portion, 2 is a reflective shade, The xenon tube 1 and the reflective shade 2 are attached to the holder 3 by the xenon tube attaching rubber 4 at the holder to constitute a light emitting unit. Reference numeral 5 denotes a base plate, and the holder 3 can be slid in the front-rear direction without falling off by engaging the foot portions 3a provided at four places on the holder 3 with the rib portions 5a provided on the base plate 5. It is attached to the main plate 5. An optical member 6 such as a light guide is attached to the two protrusions 5b of the base plate 5 and has a function of condensing the light emitted from the light emitting unit. Reference numeral 7 denotes a cam plate which is engaged with a foot portion 5c provided on the lower surface of the base plate 5 and is slidably attached in the lateral direction in the figure. A plurality of cam grooves 7a are formed on the upper surface of the cam plate 7, and the holder 3 The light emitting unit is slid back and forth by engaging with the pin 3b and the cam plate 7 sliding in the horizontal direction in the figure. A leaf spring 8 is attached to the pedestal portion 5d of the base plate 5 with screws 9, and two spherical protrusions 8a are provided at the tip thereof. The leaf spring 8 is deformed in the attached state, and the protrusion 8 Engages with the V-shaped groove 3c on the rear side of the holder 3 and presses the holder 3 toward the bottom of the figure.

次に上記構成の動作について説明する。図３はワイド状態を示し、図示しないカメラのズームレンズがワイド状態からテレ状態にズーム動作すると、それと連動して、カム板７が図１の右方向（図３の断面図では図面後方）に摺動する。すると、カム溝７ａがホルダー３のピン３ｂを押して、ホルダー３を後方に作動させ、テレ状態となる。図４は、テレ状態を示す断面図である。   Next, the operation of the above configuration will be described. FIG. 3 shows a wide state. When a zoom lens of a camera (not shown) zooms from the wide state to the tele state, the cam plate 7 moves in the right direction in FIG. 1 (rear in the drawing in the sectional view of FIG. 3). Slide. Then, the cam groove 7a pushes the pin 3b of the holder 3 to actuate the holder 3 rearward, and the tele state is obtained. FIG. 4 is a cross-sectional view showing a tele state.

板バネ８の作用について説明すると、２個の突起部８ａがホルダー３の溝３ｃと係合することにより、まずホルダー３と地板５との係合で、横方向のガタが発生しても、突起部８ａの球面が溝３ｃの斜面を押すことにより横方向の分力が発生し、横方向のガタが押さえられる。次に作動時については球状の突起部８ａが２個あることにより、横方向の回転が規制され、前後方向の作動では一定の軌跡を通る。さらに、板バネ８はホルダー３を下方向に押し付けることにより摩擦力が発生し、ホルダー３のピン３ｂとカム板７のカム溝７ａとのガタが存在しても、例えばカメラを下向きにしたときなどにストロボユニットが、ピン３ｂとカム溝７ａとのガタ分動いてしまうといった不具合が発生することがない。   The action of the leaf spring 8 will be described. When the two protrusions 8a are engaged with the groove 3c of the holder 3, first, even when the play between the holder 3 and the ground plate 5 is generated, When the spherical surface of the protrusion 8a pushes the inclined surface of the groove 3c, a lateral component force is generated and the lateral play is suppressed. Next, at the time of operation, since there are two spherical protrusions 8a, the rotation in the lateral direction is restricted, and in the operation in the front-rear direction, a fixed trajectory is passed. Further, the leaf spring 8 generates a frictional force by pressing the holder 3 downward. Even if there is play between the pin 3b of the holder 3 and the cam groove 7a of the cam plate 7, for example, when the camera is turned downward Thus, there is no problem that the strobe unit moves by the backlash between the pin 3b and the cam groove 7a.

本発明の一実施例を示す、背面斜視図。The rear perspective view which shows one Example of this invention. 図１の分解斜視図。The exploded perspective view of FIG. 図１の断面図で、ワイド状態を示す図。The figure which shows a wide state in sectional drawing of FIG. 図１の断面図で、テレ状態を示す図。The figure which shows a tele state in sectional drawing of FIG.

符号の説明Explanation of symbols

１ キセノン管
２ 反射笠
３ ホルダー
３ｃ Ｖ字状の溝
５ 地板
７ カム板
８ 板バネ
８ａ 突起部 1 Xenon tube 2 Reflecting shade 3 Holder 3c V-shaped groove 5 Ground plate 7 Cam plate 8 Leaf spring 8a Protrusion

Claims (2)

発光部と反射笠を備えた保持部材が、カメラの構成部材に摺動可能に取り付けられ、該保持部材の移動によって照射角を可変とするストロボ装置において、
該保持部材は、移動方向と略平行に設けられた略Ｖ字状の溝を備え、該溝に複数の突起部を備えた弾性部材を係合させるようにしたことを特徴とする照射角可変ストロボ装置。 In a strobe device in which a holding member including a light emitting unit and a reflective shade is slidably attached to a component member of a camera, and an irradiation angle is variable by movement of the holding member,
The holding member includes a substantially V-shaped groove provided substantially in parallel with the moving direction, and an elastic member having a plurality of protrusions is engaged with the groove. Strobe device. 前記発光部の前面に光学部材を配置し、該光学部材と発光部の距離が変わることにより照射角を変化させるようにしたことを特徴とする請求項１記載の照射角可変ストロボ装置。   2. An irradiation angle variable strobe device according to claim 1, wherein an optical member is disposed in front of the light emitting unit, and an irradiation angle is changed by changing a distance between the optical member and the light emitting unit.

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