JP2007025249A - Illuminator for camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve the high performance and miniaturization of an illuminator by correctly setting the relative positional relation between the optical member and the light source means to designed positions according to the invention, since there is a defect that it is impossible to achieve the design values of the functions of the illuminator, such as an illumination angle and a target distance because the relative positional relation between the optical member and the light source means is determined only via a reflection shade when miniaturization of the illuminator is designed. <P>SOLUTION: The illuminator for a camera which emits a luminous flux from the light source means forward as illuminating light with a predetermined illumination angle via the reflecting shade and the optical member, is constituted so that a positioning means that restricts the positions of the light source means and reflecting shade in a predetermined direction is integrally formed with the optical member, and a pressing member for pressing the light source means against the reflecting shade is disposed in a direction almost perpendicular to the predetermined direction, so that the light source means and reflecting shade are positioned with respect to the same holding member. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an illuminating device for a camera, and more particularly to a illuminating device for a camera that irradiates a light beam from a light source means forward as irradiation light having a predetermined irradiation angle via an optical member.

  A conventional lighting device of this type will be described with reference to FIG. In this figure, 21 is an optical member made of a transparent resin such as acrylic, 22 is a light source means made of a flash discharge tube such as a xenon tube, and 23 is a reflective shade made of a material such as bright aluminum. On the inner side of the reflective shade 23, a protrusion 23a that projects toward the light source means 22 is integrally formed. Further, both end portions of the reflective shade 23 are locked to locking portions 21 a formed on the optical member 21. Reference numeral 24 denotes a holding member that has an approximately L-shaped cross section and holds both the optical member 21 and the reflective shade 23.

Here, the light source means 22 is urged toward the reflecting shade 23 by an unillustrated elastic member and comes into contact with the protrusion 23a. However, although there is a positioning (locking portion 21a) between the optical member 21 and the reflective shade 23, there is no particular positioning between the optical member 21 and the light source means 22, and the relative relationship between the two. The positional relationship was determined only via the reflective shade 23.
JP 2001-005063 A

  However, in the above conventional example, the relative positional relationship between the optical member and the light source means has a drawback that it largely fluctuates due to a deviation at the time of assembly and a dimensional tolerance of parts. Therefore, as the design of the illuminating device becomes smaller, the relative position relationship between the optical member and the light source means is determined only via the reflective shade. There was a drawback that it could not be completed as designed.

  An object of the present invention is to accurately arrange the relative positional relationship between the optical member and the light source means at a position as designed, thereby achieving high performance and downsizing of the lighting device.

  The present invention regulates the positions of the light source means and the reflective shade in a predetermined direction in a camera illumination device that irradiates the light flux from the light source means forward as illumination light having a predetermined illumination angle via the reflective shade and the optical member. And a biasing member for biasing the light source means in the direction of the reflective shade in a direction substantially orthogonal to the predetermined direction, the light source means and the reflective shade being the same. It is characterized by being positioned with respect to the holding member.

  As described above, according to the present invention, the relative positional relationship between the optical member and the light source means can be accurately arranged at the position as designed, and the performance and size of the lighting device can be improved.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a longitudinal sectional view of the lighting device of the present invention, and FIG. 2 is a perspective view of the assembled lighting device of the present invention. In both figures, 1 is an optical member made of a transparent resin such as acrylic, 2 is a light source means such as a xenon tube, 3 is a reflecting shade for condensing and reflecting light from the light source means 2, and 4 is the optical member 1 And a holding member having a substantially L-shaped cross section for holding the reflective shade 3. Reference numeral 5 denotes an integral rubber band-shaped elastic member for bringing the light source means 2 into contact with the reflective shade 3, and in FIG. 1, the light source means 2 is brought into contact with the reflective shade 3 side (right direction in FIG. 1). Is energized. Here, since the rear end portion of the elastic member 5 is locked to a part of the holding member 4, as a result, the light source means 2 and the reflective shade 3 are integrated with each other on the holding member 4 side (right direction in FIG. 1). It is energized. 4 a is a receiving portion of the reflective shade 3 formed integrally with the holding member 4. 1 a is a concave reflecting shade position restricting portion formed integrally with the optical member 1. Reference numeral 1b denotes a substantially U-shaped light source position restricting portion which is formed integrally with the optical member 1 in the same manner. Reference numeral 1c denotes a rib formed integrally with the optical member 1, which is fitted in a not-shown concave portion of the holding member 4 to position the optical member 1 in the irradiation optical axis direction.

  In the description of the present embodiment, the light source means 2 is urged toward the reflecting shade 3 by the elastic member 5 in the form of an integral rubber band. There is no change in the embodiment of the present invention. Further, the cover member shown in the figure is fixed to the holding member 4 so as to be electrically insulated from the outside of the lighting unit.

  By setting it as the said structure, the position of the light source means 2 with respect to the optical member 1 is decided in the perpendicular direction (up-down direction of FIG. 1) of an illuminating device. Further, the position of the reflecting shade 3 is determined with respect to the optical member 1 by the position restricting portion 1a in the horizontal direction of the illumination device (left and right direction in FIG. 1). The light source means 2 is pressed against the contact portion 2 a of the reflective shade 2 by the elastic member 5 and is pressed against the contact portion 4 a of the holding member 4. Since the positions of the reflective shade 3 and the light source means 2 are uniquely determined with respect to the optical member 1, even if the entire lighting device is downsized, the positional accuracy does not deteriorate.

1 is a longitudinal sectional view of a light emitting device according to a first embodiment of the present invention. The perspective view of the assembly state of the light-emitting device which concerns on the 1st Example of this invention. The longitudinal cross-sectional view of the light-emitting device which concerns on the prior art example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical member 2 Light source means 3 Reflecting shade 4 Holding member 5 Elastic member

Claims (2)

  In a camera illumination device that irradiates a light beam from a light source means forward as irradiation light having a predetermined irradiation angle via a reflective shade and an optical member, positioning means for regulating positions of the light source means and the reflective shade in a predetermined direction is provided. A biasing member that is integrally formed with the optical member and biases the light source means in the direction of the reflective shade in a direction substantially orthogonal to the predetermined direction is provided, and the light source means and the reflective shade are attached to the same holding member. An illumination device for a camera, characterized by being positioned. 2. The camera irradiation apparatus according to claim 1, wherein the positioning unit also serves as positioning in the left-right direction toward the irradiation direction of the reflecting shade. 3.

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