KR970011120B1 - Strobo for zoom camera - Google Patents

Abstract

A strobe apparatus of a zoom camera which controls a reflecting angle of a reflecting kat when zooming a photographing lens is disclosed. In the apparatus, an optical member is located in a front surface of an light emitting means. A reflecting kat focuses an emitted light on the optical member. The reflecting kat interlocks with an operation of the zoom lens. A reflecting kat angle control member(7) is located at an outer peripheral surface of the reflecting surface. The control member moves perpendicular to the optical member and changes a reflecting angle of the reflecting kat.

Description

Stroboscope of the zoom camera

1 is a front sectional view showing a stroboscope apparatus of a zoom camera according to the present invention.

Figure 2 is a front sectional view for explaining the operating state of the strobe device of the present invention.

3 is a view for explaining the irradiation angle of the light according to the change of the reflector according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Fresnel lens 3: Xenon tube

5: reflection shade 5a, 5b: lower and upper reflection shade

7: reflection angle adjustment member 7a: hole

[Industrial use]

The present invention relates to a strobe device of a zoom camera, and more particularly, by adjusting an angle of reflection of a reflection shade during zooming operation of a photographing lens, so that the amount of light irradiated to a subject from a wide shooting state to a tele shooting state can be adjusted appropriately. It relates to a camera strobe device.

[Prior art]

In general, a zoom camera maintains the photographing lens at the same time as the focal length varies linearly from the wide to the tele state depending on the selective operation of the zoom switch. The finder device and the strobe device are linked to the zoom gear for driving the move barrel, or by separate driving means linked to the movement of the move barrel.

Therefore, the finder magnification is changed according to the selective variation of the photographing lens, and the light irradiated from the light source of the strobe device is shined on the subject in a good state according to the variation of the photographing lens, thereby realizing a good subject image. .

As described above, in a zoom camera, a strobe device is simultaneously disclosed in the same direction as zooming of a photographing lens, as disclosed in US Patent No. 4,944,030 (name: lens shutter camera including a zoom lens). The location of the light source with respect to the focal length of the Fresnel lens is determined by increasing and decreasing the distance from the means.

In addition, Japanese Patent Application Laid-Open No. 5-66464 (name; flashing illumination device of variable irradiation angle, publication date; March 19, 1993) has a light emitting means interlocking with the first and second optical members when zooming the photographing lens. The second optical member having a condensing or diverging function is shifted before and afterwards, so that the divergence angle of the light varies according to the wide angle or telephoto shooting position, so that a proper amount of light is irradiated to the subject to realize a good subject image. It is.

And as disclosed in Japanese Patent Application Laid-Open No. 60-52831 (name; flashing device, publication date; March 26, 1985), each optical member is interlocked in accordance with the zooming operation of the photographing lens to irradiate light emitted from the light emitting means. By varying the angle, the irradiation amount of the subject is appropriately adjusted in accordance with the zooming operation of the photographing lens, thereby achieving a good subject image.

[Problem to Solve Invention]

Such a prior art can realize the subject image of a good image by appropriately irradiating the irradiation angle of the light irradiated to the subject side by interlocking the first, second optical members or the light emitting means of the stroboscope according to the zooming operation of the photographing lens. The space occupied by the stroboscopic device as the distance between the first and second optical members or the light emitting means of the stroboscopic device (for example, when the zoom ratio is 2.5 is about 10 mm) depends on the zooming operation of the photographing lens. It is not possible to realize compactness due to its many features, and it is disadvantageous to secure space. It is caused by interference of electric wires to connect power when interlocking light emitting means, and interlocking irregularly without interlocking parallel with optical axis when moving forward and backward. That is, a problem that is interlocked with zigzag results.

In addition, since the shape of the Fresnel lens, which is the first and second optical members, and the reflection shade of the light emitting means is fixed, the surrounding light is not irradiated to the subject and blocked inside the frame or the camera in a tele shooting state in which it is necessary to focus the light. There is a problem inherent in that a phenomenon occurs that a clear subject image due to a loss of light quantity cannot be obtained.

The present invention has been made to solve the problems of the prior art as described above, an object of the present invention by selectively adjusting the reflection angle of the reflector of the light emitting means during the zooming operation of the photographing lens, the tele-photographing state in a wide shooting state The present invention provides a stroboscopic device for a zoom camera capable of adjusting the amount of light irradiated to a subject appropriately, as well as ensuring space, to realize compactness.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a zoom including a strobe device fixed to a frame and an optical member for switching the direction of light irradiated from the light emitting means, and a stroboscopic device interlocked with the finder device. A camera comprising: a reflection shade installed on an outer circumferential surface of the light emitting means to reflect light emitted to the optical member; It provides a strobe device for a zoom camera, characterized in that further comprising a reflection shade adjustment member for contacting the outer peripheral surface of the reflection shade to vary the reflection angle of the reflection shade.

The reflection shade is composed of an upper and a lower reflection shade having an elastic material, characterized in that configured to maintain a state in which both sides constant height of both reflection shades always overlap.

In addition, the reflection shade adjusting member is interlocked with the finder device, and a hole having a diameter smaller than the outer diameter of the reflection shade is formed so that the angle of the reflection shade can be changed even during a short distance transfer to contact the inner circumferential surface of the hole and the outer circumferential surface of the reflection shade. Characterized in that the.

[Action]

In the stroboscope apparatus of the zoom camera of the present invention, when the photographer operates the selector switch to zoom the photographing lens, the zoom gear is operated to move the move barrel holding the photographing lens so that the photographing lens is wide or tele-photographed. The magnification is determined by shifting to the position of the state and at the same time, the finder and stroboscopic device are interlocked by the zoom gear or the moving barrel to change the magnification of the finder according to the shift of the photographing lens, and irradiates an optimal light to the subject to obtain a good subject image. When the photographing lens is zoomed to the tele photographing position, the reflection shade adjusting member which cooperates with the finder device is linearly guided to the frame of the strobe device to be advanced.

Therefore, the reflection shade of the light emitting means is further overlapped with the upper reflection shade by the hole of the reflection angle adjusting member, and the reflection angle thereof is changed, so that a good object image can be obtained by reflecting light suitable for the tele shooting state.

That is, direct light or reflected light in a tele (or telephoto) photographing state is reflected from a light source of the light emitting means to the Fresnel lens to irradiate the subject.

At this time, since the size of the Fresnel lens is made to match the wide state, a clear subject image can be obtained because the light irradiated from the light source is not lost and the whole is irradiated to the subject.

In this state, when the photographing lens is switched to the wide photographing state, the finder device is linked with the rotation of the move barrel to determine the finder magnification suitable for the variation of the wide photographing state, and at the same time, the reflection shade adjusting member of the stroboscopic device interlocking with the finder device. By retreating, the retracted reflector is restored to its initial state, that is, a wide (or wide-angle) photographing state, by its elastic force to preserve the reflection angle.

That is, the direct light or the reflected light in the wide photographing state is reflected from the light source of the light emitting means to the Fresnel lens to irradiate the subject, thereby realizing a good subject image.

EXAMPLE

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

1 is a front sectional view showing a stroboscopic apparatus for a zoom camera according to the present invention, wherein reference numeral 1 denotes an optical member such as a Fresnel lens.

The Fresnel lens 1 is fixed to the subject side and serves to switch the direction of the light irradiated from the light emitting means, and the size of the Fresnel lens 1 matches that of the zoom camera in the wide angle shooting state (Wide shooting state). In the telephoto photographing state (Tele photographing state), it is possible to implement a clear subject image by preventing light loss.

The light emitting means fixed to the frame (not shown) of the strobe device at a predetermined distance away from the Fresnel lens 1 is a xenon tube (3) which emits light when xenon gas is filled in the discharge tube and instantaneously ionized by high current supply. ) And a reflector 5 for reflecting light emitted from the light source toward the Fresnel lens 1 side, and the light emitted from the xenon tube 3 is reflected by the Fresnel lens 1 by the reflector 5. Will be irradiated to the side.

The reflector 5 of the light emitting means comprises an upper reflector 5b and a lower reflector 5a so that the light emitted from the light source is irradiated to the Fresnel lens 1 side without being lost, and in the initial state, both reflector 5a, 5b is overlapped with a constant width D on both sides, in order to prevent the light source from flowing out of the reflection shade 5.

In addition, the reflection shade 5 is formed of an elastic material so that the angle adjustment is well realized by the reflection shade adjustment member described later and restored to the initial state.

The reflection shade adjustment member 7 is interlocked with the finder device which is interlocked by a transfer means for zooming the photographing lens (not shown) according to the operation of the zoom gear (not shown) and converting the rotational force of the zoom gear into linear motion. And a hole 7a formed smaller than the outer diameter of the reflector 5 is formed to emit light even for short distance conveyance of the reflector adjustment member 7 (for example, a distance of 5 mm moved back and forth in case of a zoom ratio of 2.5). The angle of the reflector 5 of the means is adapted.

The hole 7a of the reflection shade adjusting member 7 is formed in an arc shape so as to coincide with the outer circumferential surface so that the correct operation of the reflection shade 5 is performed during the zooming operation of the photographing lens.

In the strobe device of the zoom camera of the present invention configured as described above, when the photographer operates the selection switch to zoom the photographing lens, the zoom gear is operated to move the barrel barrel (not shown) that holds the photographing lens, thereby photographing. The lens is transported to the wide or tele shooting position to determine the variation, and at the same time, the finder and stroboscope are linked by the zoom gear or move barrel to change the magnification of the finder according to the variation of the shooting lens, and to provide the optimum light to the subject. When the photographing lens is zoomed to the tele photographing position, the reflector adjusting member 7 which cooperates with the finder device is placed on the frame of the stroboscopic apparatus as shown in FIG. It is linearly guided and advanced toward the reflector 5.

Therefore, the reflection shade 5 of the light emitting means is pressed by the hole 7a of the reflection shade adjustment member 7 and at the same time both side portions of the upper and lower reflection shades 5b and 5a overlap more than the initial state, and the reflection angle By being variable, it is possible to obtain a good subject image by reflecting light suitable for the tele-photographing state.

That is, the direct light 9a, 9b or the reflected light 11a, 11b by the reflector 5 in the tele (or telephoto) photographing state as shown by the dotted line in FIG. 3 from the light source of the light emitting means is Fresnel. The subject is irradiated through the lens 1.

At this time, since the size of the Fresnel lens 1 is made to correspond to the wide state, a clear subject image can be obtained because the light irradiated from the light source is not lost and the whole is irradiated to the subject.

In this state, when the photographing lens is switched to the wide photographing state, the finder device is linked with the rotation of the move barrel to determine the finder magnification suitable for the variation of the wide photographing state, and at the same time, the reflection shade adjusting member of the stroboscopic device interlocking with the finder device. By retreating as shown in FIG. 1 in the state shown by (7) in FIG. 2, an initial state, i.e., a wide (or wide-angle) photographing state, is caused by the self-elastic force of the retracted both reflection shades 5a and 5b To preserve the reflection angle.

That is, the direct light 13a, 13b or the reflected light 15a, 15b in the wide photographing state is reflected by the Fresnel lens 1 as shown by the solid line of FIG. 3 from the light source of the light emitting means. By irradiating, a good subject image is realized.

[effect]

As described above, the strobe device of the zoom camera of the present invention selectively varies the reflection angle of the reflection shade by a reflection shade adjusting member interlocked with a finder device that is linked with the zooming operation of the photographing lens, thereby preventing the subject from being lost through the Fresnel lens. Because it can be properly irradiated to the target, a good image of the subject can be realized, and in particular, the space can be advantageously controlled by shortening the transport distance of the reflection angle adjusting member interlocked with the finder device and selectively changing the reflection angle of the reflection shade. In addition, the strobe device can be made compact, and since the light emitting means is fixedly installed in the frame, the light emitting means can be prevented from being inclined because the light emitting means is not interfered with the wires connected to the power source. It is an invention.

Claims (4)

A zoom camera having a light emitting means fixed to a frame and an optical member for switching the direction of light emitted from said light emitting means, and having a built-in stroboscopic device interlocking with a finder device. An optical member for changing the direction is located on the front surface of the light emitting means, the reflector is provided on the outer peripheral surface of the light emitting means to collect the light emitted to the optical member surface so that the angle can be adjusted In response to the operation of the zoom lens, the reflection shade is interlocked up and down, and the reflection shade angle adjusting member positioned on the outer circumferential surface of the reflective surface and in contact with the outer circumferential surface linearly moves in a direction perpendicular to the optical member in conjunction with the zoom lens operation. While being made of a control member for varying the reflection angle of the reflection shade Strobe unit of the zoom camera of Jing. The stroboscopic apparatus of claim 1, wherein an inside of the reflector is made of a material having high reflectivity and elasticity, and both sides of the reflector are always overlapped. The method of claim 1, wherein the reflection shade adjustment member is made of a hole formed in a space smaller than the distance connecting the top and bottom of the reflection shade so as to change the angle of the reflection shade in conjunction with the finder moving device and a short distance transfer, the inner circumferential surface of the hole and the reflection shade Strobing device of the zoom camera, characterized in that configured to adjust the angle in contact with the outer peripheral surface. The method according to claim 1, wherein the reflecting member is operated by an elastic force of a reflecting shade material in acting in a direction in which the reflecting angle is narrowed and widened by the reflector angle adjusting member. Strobing device of zoom camera.