JPH03194529A - Stroboscope attaching structure for camera - Google Patents

Abstract

PURPOSE:To obtain sufficient emission light quantity which is appropriate for long- distance photographing and short-distance photographing at the narrow irradiation angle of emission light by using a small-capacity capacitor by supporting a stroboscope in a camera main body so that it can be freely rocked with respect to a photographing lens part by interlocking with the focusing ring of the photographing lens part. CONSTITUTION:When the focusing ring 17 rotates in an approaching direction, the stroboscope 13 is made to rock to the photographing lens barrel 12 side centering around a shaft 14 by a cam follower 16 and a cam 18, and when the focusing ring 17 rotates in a long-distance photographing direction, the stroboscope 13 is made to rock in an opposite direction to the photographing lens barrel 12 centering around the shaft 14 by the cam follower 16 and the cam 18. Since the stroboscope 13 is made to rock from right to left by interlocking with the focusing ring 17, both of short- distance photographing and long-distance photographing can be covered at the narrower irradiation angle than that of the emission light in the case of long-distance photographing as usual, the stroboscope 13 is miniaturized, and the sufficient emission light quantity which is appropriate photographing circumstances is obtained even by using the small-capacity capacitor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a strobe mounting structure for cameras such as still cameras and electronic still cameras.

[Summary of the Invention] The present invention provides a strobe mounting structure for a camera such as a still camera, in which a strobe is supported on the camera body so as to be swingable relative to the photographic lens section in conjunction with a focus ring of the photographic lens section. This makes it possible to obtain a light amount (brightness) suitable for each shooting situation, such as long-distance photography and close-up photography, even with a small (low output) strobe.

[Prior Art] For example, a strobe used in a still camera uses a discharge tube filled with xenon gas to which a high voltage charge stored in a capacitor is applied, causing the tube to emit light instantaneously. Also,
The amount of light emitted is determined by the amount of charge stored in the capacitor if the efficiency of the discharge tube is the same, and furthermore, by charging the capacitor, it can be used repeatedly. Nowadays, small strobes built into camera bodies have become popular due to their ease of use. The usage state of this conventional strobe will be explained in detail with reference to FIG. 4. In FIG. 4, numeral 1 is a photographing lens section, and numeral 2 is a strobe. The strobe 2 should be placed as far away from the photographic lens section 1 as possible to prevent so-called red-eye. However, the flash illumination angle that you want to cover with strobe 2 during shooting changes depending on the distance of the subject. For example, when shooting at a long distance (M), the flash illumination angle (α14') of strobe 2 is narrowed, ), change the flash irradiation angle (αNo) of strobe 2 to a wider range), and if the strobe 2 is of a fixed type, adjust the flash irradiation angle of strobe 2 to the wide-angle flash irradiation angle (αHo). That's what I was doing.

It was true.

SUMMARY OF THE INVENTION Therefore, the present invention provides a camera strobe mounting structure that uses a small-capacity condenser and can obtain a sufficient amount of light emitted at a narrow illumination angle suitable for both long-distance photography and close-up photography. be.

[Problems to be Solved by the Invention] However, if the strobe 2 is of a fixed type, if you try to make the brightness of the strobe 2 the same for long-distance (M) shooting and short-distance (N) shooting, the above-mentioned problem will occur. This had the disadvantage that electrical parts such as capacitors had to be larger, making the strobe and camera larger accordingly.

To deal with this, a method has been considered in which the strobe light 2 can be slid forward and backward to change the strobe light emission angle, but a narrow light emission angle can be used for both long-distance photography and close-up photography. In order to cover this, the distance the strobe must move in the front and back direction becomes large, making it difficult to downsize the camera [Means to solve the problem] is swingably supported with respect to the photographing lens section.

[Function] Since the strobe is oscillated relative to the photographic lens section in conjunction with the focusing of the photographic lens section, the direction of the strobe can be changed depending on long-distance photography or close-up photography, making it compact and compact. Even with a strobe, the amount of light (brightness) of emitted light suitable for each shooting situation of long-distance shooting and short-distance shooting can be obtained.

Since the strobe can be made smaller in this way, the entire camera can be made even more compact.

[Example] Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1.2, 10 is a camera body of a still camera, and a photographing lens mirror rtJ (photographing lens section) 12 is fixed to a mounting portion 11 standing up on the front side of the top surface of the camera body through a predetermined means. Further, on the front side of the upper surface of the camera body 10, a strobe 13 is rotatably supported via a shaft 14 at a predetermined distance apart from the photographing lens barrel 12. The upper surface of the strobe 13 on the side of the photographing lens barrel 12 is supported by a pair of brackets 15.15 erected on the upper surface of the camera body 10 so as to be movable back and forth between the photographing lens barrel 12 and the strobe 13. One end 16a side of the rod-shaped cam follower 16 is pivotally supported by a pin. A focus ring 17 of the photographic lens barrel 12 is located at a position facing the other end 16b of the cam follower 16. A ring-shaped cam 18 of a predetermined shape and thickness is fixed to the outer circumferential surface of the focus ring 17, with which the other end 16b of the cam follower 16 comes into contact.

The cam follower 16 is always urged toward the cam 18 by a tension coil spring 19 interposed between the central portion 16c of the cam follower 16 and one bracket 15 on the photographing lens barrel 12 side.

When the focus ring 17 rotates in the close-up direction (near-distance shooting direction), the strobe 13 swings about the axis 14 toward the photographic lens barrel 12 side by the cam follower 16 and cam 18, and the focus ring 1
When the lens 7 rotates in the long-distance photographing direction, the strobe 13 swings about the axis 14 in the opposite direction to the photographing lens barrel 12 by the cam follower 16 and cam 18. In the figure, 20 is an imager provided at the rear of the photographic lens barrel 12.

According to the strobe mounting structure of the still camera of the embodiment described above, the strobe 13 moves as shown in the two-dot chain line in FIG. As shown in FIG.
(M), the strobe 13 swings in the opposite direction to the photographing lens barrel 12.

In this way, by making the strobe 13 swing left and right in conjunction with the focus ring 17 of the photographing lens barrel 12, the light emission angle (α
M. ) With a narrower irradiation angle (α0), it is possible to cover both close-up and long-distance shooting, and the strobe 13 can be made smaller using a small-capacity condenser (not shown).
Even if the strobe 13 is used, a sufficient amount of light (brightness) suitable for each photographing situation can be obtained by the strobe 13.

Furthermore, as mentioned above, even if the strobe 13 is made smaller, there will be no problem in short-range and long-distance shooting, so the charging capacitor (not shown) built into the strobe 13 can be made smaller. Charging time can be shortened.

Furthermore, since the strobe 13 can be made smaller, the overall structure of the camera can be made smaller accordingly.

Incidentally, although the above embodiments have been described with respect to a still camera, the present invention is not limited to this and can of course be applied to various cameras such as an electronic still camera.

Furthermore, the means for moving the strobe light is not limited to the combination of a cam and a link mechanism, and various design changes are possible.

[Effects of the Invention] As described above, according to the present invention, since the strobe is oscillated relative to the photographic lens section in conjunction with the focusing of the photographic lens section, The direction of the strobe can be changed, and even a small strobe can provide the appropriate brightness for each of the above-mentioned shooting situations. Furthermore, since the strobe can be made smaller, the entire camera can be made even smaller.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of the main parts of a still camera showing an embodiment of the present invention, FIG. 2 is a schematic plan view of the main parts, FIG. The figure is a schematic explanatory diagram showing how a conventional strobe is used. DESCRIPTION OF SYMBOLS 10... Camera body, 12... Taking lens barrel (taking lens part), 13... Strobe, 18... Focus ring.

Claims (1)

[Claims] (1) A strobe mounting structure for a camera, characterized in that a strobe is supported on the camera body so as to be swingable relative to the photographic lens section in conjunction with a focus ring of the photographic lens section.