JPS6215525A - Variable focus camera with strobe - Google Patents

Abstract

PURPOSE:To obtain a variable focus camera with a strobe which has superior operability by providing an operation member for switching the focal length of a photographic lens between a short-focus side, and a strobe irradiation angle switching means interlocking with the operation member. CONSTITUTION:An annular guide groove 1a is formed in the center of the front surface of the camera body 1 at an inner side from the front surface and an engagement projection part 4a which is provided in an L-sectioned shape to the peripheral edge part of the operation member 4 in a bottomed cylindrical shape and also formed annularly engages the guide groove 1a turnably. A long-focus lens 6 are arranged on the front surface of the operation member 4 at an equal angle to the center. Further, the 1st lens plate 7 for forming the same angle of strobe irradiation as the field angle of the short-focus lens 6 is fixed to the tip part of the 1st arm part 4b of the operation member 4 and the 2nd lens plate 8 for forming the same angle of strobe irradiation as the field angle of the long-focus lens 5 is fixed to the top part of the 2nd arm part 4c.

Description

Detailed Description of the Invention (a) Technical Field The present invention relates to a variable-focus camera with a strobe, and more specifically, it relates to a variable-focus camera with a strobe, and more specifically, a camera that integrates a photographing lens whose focal length can be changed in multiple stages and a strobe. This relates to a camera built into the.

(b) Prior Art In recent years, cameras have become significantly more compact, and photographic lenses whose focal lengths can be changed by operating the barrel have come to be incorporated into camera bodies.

This type of photographic lens has multiple stages of short focal length and long focal length by operating a switching button on the camera body.
For example, it is possible to switch between combinations such as wide-angle lens/telephoto lens, wide-angle lens/standard lens, and monk lens/telephoto lens.

In addition, the Sl-robo device also has its circuit components, such as D
As C/DC converters, main capacitors, etc. become smaller and more sophisticated, they are increasingly being incorporated into cameras incorporating the above-mentioned photographic lenses.

In such a conventional camera with a variable focus camera, the illumination angle of the robot device is a constant angle regardless of the switching of the focal length of the photographing lens.
~There is a problem that Robohikari is not being used effectively. In other words, if the illumination angle of the robot device is uniformly set to include the angle of view when the shooting I-nons is switched to the short focus side, when the shooting lens is switched to the short focus side. Although it is sometimes possible to make effective use of the S1-Robo light, when the photographic lens is switched to the long focus side, the angle of view becomes narrower, resulting in wasted S1-Robo light that does not contribute to the actual shooting. A large guide number that can be obtained when the S1/Robo irradiation angle is set to correspond to the angle of view on the focal point side cannot be obtained, and the possible shooting distance for S1/Robo is shortened.

Also, in general, the aperture f-number of a shooting lens becomes larger when the shooting lens is switched to the long focal length side, so when using a variable focus camera like the one mentioned above,
There is also a problem in that the distance at which one stroke of three strokes can be photographed on the long focal length side is even shorter than that described above than on the short focal length side. On the other hand, there are cameras with variable focal length strobe light emitting windows only on the short focal length side where robot photography is frequently performed, but such cameras are extremely inconvenient.

Furthermore, the illumination angle of the strobe device can be set to correspond to when the photographing lens is switched to the short focus side, which is often used for shooting, and the strobe light emitting A condensing lens plate is attached externally to the front surface of the camera to narrow the irradiation angle. but,
Although such devices make effective use of strobe light, there is a problem in that the operability is extremely poor.

(c) Purpose The Kyo invention was made in view of the above circumstances, and its purpose is to utilize strobe light emitting windows and to
To provide a variable focus camera with a robot capable of changing a strobe irradiation angle in conjunction with switching the focal length of a photographic lens.

(d) Configuration In order to achieve the above object, the present invention provides a camera in which a photographic lens whose focal length can be switched in multiple stages and a camera lens that can change the focal length in multiple stages, and a camera that integrates a photographic lens, An operating member for switching the distance between the short focus side and the long focus side, and in conjunction with this operating member, when the operating member is operated to the short focus side, the strobe illumination angle corresponds to the angle of view on the short focus side. and a robot illumination angle switching means for making the strobe illumination angle correspond to the angle of view on the long focus side when the operating member is operated to the long focus side. It is something to do.

Hereinafter, the present invention will be specifically described based on embodiments shown in the accompanying drawings.

- First, a first embodiment of the present invention will be described using FIGS. 1 and 2. In this embodiment, the variable focus camera with a strobe is equipped with a first lens plate located in front of the strobe light emitting window so that a wide strobe illumination angle is formed when the photographing lens is switched to the short focal length side. The second lens plate is positioned in front of the strobe light emission window so that a narrow strobe irradiation angle is formed when the lens is switched to the long focal length side.

That is, the camera body 1 is provided with a finder 2, and within the finder 2, an image frame on the short focus side and an image frame on the long focus side are formed by appropriate means. A light emitting window 3, which is an aperture for irradiating light from a strobe device, is formed at a corner of the front surface of the camera body 1. In the center of the front surface of the camera body 1, an annular guide groove 1a is formed at the back from the front surface, and in this guide groove 1a, a bottomed cylindrical operation member 4 is formed.
An engaging protrusion 4a, which is formed in an annular shape and is connected to the peripheral edge of the engagement protrusion 4a in a cross-sectional shape, is rotatably fitted therein.

A long focal length lens 5 and a short focal length lens 6 are disposed on the front surface of the operating member 4 and are arranged at equal angles with respect to the center thereof. Further, the operating member 4 is provided with a first arm portion 4b and a second arm portion 4c that are arranged at equal angles with respect to the center thereof and extend outward. This first arm portion 4b
A first lens plate 7 for forming a strobe irradiation angle that is approximately the same angle as the angle of view of the short focus lens 6 is fixed to the tip of the lens. Furthermore, a second lens plate 8 for forming a strobe irradiation angle that is approximately the same angle as the angle of view of the long focus lens 5 is fixed to the tip of the second arm 4c.

Note that the figure shows a state in which the short focus lens 6 is aligned with the photographing optical axis and the first lens plate 7 is aligned with the light emitting window 3.

Therefore, when performing wide-angle photography in this state,
The first lens plate 7 performs strobe photography using the short focus lens 6.
This can be done with a wide strobe irradiation angle.

On the other hand, when performing telephoto shooting with the long focal length lens 5, when the operating member 4 is rotated through an angle of 180 degrees clockwise or counterclockwise, the engaging protrusion 4a of the operating member 4 is moved to the camera body. The short focal length lens 6 is retracted from the photographing optical axis, and the long focal length lens 5 is aligned with the photographing optical axis. At the same time, the first lens plate 7 is retracted from the front surface of the light emitting window 3, and the second lens plate 8 is positioned in front of the light emitting window 3.

Therefore, strobe photography can be performed with a narrow strobe irradiation angle corresponding to the angle of view of the long focus lens 5 formed by the second lens plate 8. In this case, since the strobe irradiation angle is narrowed, the guide number of the strobe becomes larger than in the case of wide-angle photography, so movement of the operating member 4 can be detected by a switch (not shown) or the like to adjust the exposure. Furthermore, since the operating member 4, which has both a lens holding function and a lens plate holding function, can be integrally molded from plastic or the like, the number of component parts of the strobe-equipped variable focus camera can be significantly reduced.

Note that in the first embodiment described above, the first lens plate 7
The second lens plate 8 alone forms the strobe irradiation angle for wide-angle photography, and the second lens plate 8 alone forms the strobe irradiation angle for telephoto photography, but the lens plate is fixedly provided in front of the light emitting window 3. , the same lens plate and the first or second lens plate 7, 8
A desired strobe irradiation angle may be obtained by

In addition, in the first embodiment described above, the lens plate that does not correspond to the light emitting window 3, that is, the first or second lens plate 7 or 8 that does not contribute to photography when not in use, is located at the lower corner of the camera body 1. Since it is exposed, there is a risk of damaging it or accidentally rotating the operating member 4. To prevent this, a cover 10 may be provided at the lower corner of the camera body 1 to cover the first or second lens plates 7, 8 when not in use, as shown in FIG. - Next, a second embodiment of the present invention will be described using FIG. 4.

The variable focus camera with a strobe in this embodiment has a lens plate fixed on the light emitting window so that the desired narrow strobe illumination angle can be obtained when the photographing lens is switched to the long focal length side, and the photographing lens is switched to the short focal length side. An additional lens plate is selectively positioned in front of the light emitting window so that a desired wide strobe irradiation angle can be obtained when switching to the side.

That is, a camera body 1 is provided with a finder 2 similar to that described above, and a support shaft 11 is fixed to the center of the camera body. This support shaft 11 rotatably supports the center of an operating member 12 in the shape of a short cylinder with a bottom. A long focal length lens 5 and a short focal length lens 6 are supported on the front surface of the operating member 12 with an angular difference of about 30 degrees. Further, on the bottom surface of the operating member 12, an annular band-shaped drive member 12a that protrudes inward (to the opening side of the short cylinder with a bottom) is extended, and a tooth surface 12b is formed on the outer surface of the drive member 12a. has been done. This tooth surface 1.2b meshes with a tooth surface 1.3a formed on the driven member 13, which is movable in a straight line. A lens plate 14 is fixed to the tip of the driven member 13 for widening the strobe irradiation angle.

Also, in the corner of the camera body 1 there is a light emitting window 3 for a strobe device.
A lens plate 15 is fixedly provided in front of the light emitting window 3 to form a strobe irradiation angle corresponding to the field angle of the long focus lens 5.

Reference numerals 1.6 and 1.7 are stoppers for regulating the rotational position of the drive member 12a, and the state shown in the figure is such that the long focal length lens 5 is aligned with the photographing optical axis and the lens plate 14 is shows a state in which the lens plate 15 does not overlap with the lens plate 15.

Therefore, when performing telephoto shooting in this state,
Strobe photography using the long focus lens 5 can be performed with a narrow strobe irradiation angle using the lens plate 15.

On the other hand, when wide-angle photography is performed using the short focus lens 6, when the operating member 12 is rotated clockwise, the tooth surface 12b
, 1.3a moves the driven member 13 to the right,
Along with this, the lens plate 14 is superimposed on the lens plate ]5. At the same time, the short focal length lens 6 coincides with the photographing optical axis.

Therefore, strobe photography can be performed with a wide strobe irradiation angle corresponding to the angle of view of the short focus lens 6 formed by the lens plate 14 and the lens plate 15.

In this case, since the strobe irradiation angle is widened, the guide number of the strobe becomes smaller than in the case of telephoto shooting, so movement of the operating member 12 can be detected by a switch or the like (not shown) and exposure adjustment can be performed.

Next, a third embodiment of the present invention will be described using FIG. 5.

Similar to the second embodiment, this embodiment uses a fixed lens plate for telephoto shooting, and superimposes another lens plate on top of the lens plate for wide-angle shooting. In addition, the viewing angle of the finder can be changed in conjunction with switching between the short focus side and the long focus side of the photographing lens.

That is, a light emitting window 3 and a lens plate 15 are fixedly provided at the corner of the camera body 1, as in the second embodiment described above, and a light emitting window 3 and a lens plate 15 are fixedly provided on the front side of the camera body 1. An operating member 12 is provided which is rotatable. This operating member 12
, a long focus lens 5 and a short focus lens 6 are fixed with an angular difference of about 45 degrees, and a first objective lens 2 which forms a finder field of view for a short focus and a finder field of view for a long focus are fixed. The second objective lens 22 forming a corner also has a diameter of about 4
They are fixed with an angle difference of 5 degrees.

A tooth surface 12b is formed on the peripheral surface of this operating member 12,
A tooth surface 1.3a of the driven member 13 meshes with this tooth surface 12b via an intermediate gear 23. This driven member I
3 is supported so as to be movable in a straight line relative to the camera body 1, and a lens plate 14 similar to that described above is fixed to the tip of this member 13.

Note that the figure shows a state in which the long focal length lens 5 coincides with the photographing optical axis and the lens plates 14 and 15 do not overlap. Therefore, when performing telephoto shooting in this state, strobe photography using the long focal length lens 5 can be performed with a narrow strobe irradiation angle using only the lens plate 15, and at the same time, it can be performed using the long focal length finder viewing angle using the second objective lens 22. be able to.

On the other hand, when wide-angle photography is performed using the short focal length lens 6, the operating member 12 is rotated approximately 45 degrees clockwise. Then,
The intermediate gear 23 rotates counterclockwise, the driven member 13 moves upward, and the lens plate 14 is superimposed on the lens plate 15. Therefore, the strobe light emitted from the light emitting window 3 has a wide strobe irradiation angle corresponding to the field angle of the short focus lens 6 due to the lens action combined by the lens plates 14 and 15. In this case, the strobe irradiation angle is widened and the strobe guide number is lowered, so exposure adjustment can be performed in the same manner as described above.

Next, a fourth embodiment of the present invention will be described using FIG. 6.

In this embodiment, the movement of the photographic lens between the short focal length side and the long focal length side is performed by an operating member that slides in a straight line, and the strobe irradiation angle is switched in substantially the same manner as in the above-mentioned second embodiment. It is.

That is, the camera body 1 is provided with a finder 2, a light emitting window 3, and a lens plate 15 similar to those described above. Further, an operating member 32 is provided in the center of the camera body 1 and is slidable by the left and right movement of the focal length switching button 31.
A long focal length lens 5 and a short focal length lens 6 are fixed at a predetermined interval. Further, the operating member 32 has a rod-shaped arm 33 connected thereto, and a lens plate 14 similar to that described above is fixed to the distal end thereof.

Note that the figure shows a state in which the long focal length lens 5 coincides with the photographing optical axis and the lens plates 14 and 15 do not overlap. Therefore, when performing telephoto photography in this state, strobe photography using the long focal length lens 5 can be performed with a narrow irradiation angle from lens plate 15 alone.

On the other hand, when performing wide-angle photography with the short focal length lens 6, the operating member 32 is slid. Then.

Along with this, the lens plate 14 is superimposed on the lens plate 15. Therefore, the strobe light emitted from the light emitting window 3 has a wide strobe irradiation angle corresponding to the field angle of the short focus lens 6 due to the lens action combined by the lens plates 14 and 15.

In this case, the strobe irradiation angle is widened and the strobe guide number is lowered, so exposure adjustment can be performed in the same manner as described above.

Next, a fifth embodiment of the present invention will be described using a seventh embodiment.

In this embodiment, the lens plate 14 in the above-mentioned fourth embodiment,
15 is removed and a rotary lens plate is provided in its place.

That is, a tooth surface 33a is formed on the arm portion 33 similar to that described above, and this tooth surface 33a is connected to the support shaft 3 fixed to the camera body 1.
The first gear 35 meshes with a rotatable gear 35. The first lens plate 36 has a first lens plate 36 for obtaining a strobe irradiation angle corresponding to the angle of view of the long focus lens 5, and a first lens plate 36 for obtaining a strobe irradiation angle corresponding to the angle of view of the short focus lens 6. A rotary lens plate 40 that is integrated with a second lens plate 37 for obtaining a corresponding strobe irradiation angle is fixed.

=16- Note that the figure shows a state in which the long focal length lens 5 is aligned with the photographing optical axis and the first lens plate 36 is aligned with the light emitting window S.

Therefore, when performing telephoto shooting in this state,
The first lens plate 3 performs strobe photography using the long focal length lens 5.
This can be done with a narrow strobe irradiation angle according to 6.

On the other hand, when performing wide-angle photography with the short focal length lens 6, when the operating member 32 is slid to the right while holding the focal length switching button 31, the long focal length lens 5 is retracted from the photographing optical axis. The short focal length lens 6 coincides with the photographing optical axis. At the same time, the gear 35 rotates counterclockwise, the first lens plate 36 is retracted from the front surface of the light emitting window 3, and the second lens plate 37 is positioned in front of the light emitting window 3. Therefore, strobe photography can be performed with a wide irradiation angle of the second lens plate '37.

On the other hand, in the embodiment shown in FIG. 6 described above, the long focus lens 5 and the short focus lens 6 each constitute an independent optical system, but as shown in FIG. A focusing lens 5 optical system is formed, and this main lens 5
A short focus lens optical system may be formed by adding an auxiliary lens 6' to '.

(e) Effects As described above, according to the present invention, all the conventional problems can be solved, and the efficiency of using strobe light is high.
It is possible to obtain a variable focus camera with a strobe that has excellent operability.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view showing a variable focus camera with strobe according to the first embodiment of the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. FIG. 4 is a schematic front view showing a variable focus camera with strobe according to the second embodiment of the present invention, and FIG. 5 is a schematic front view showing a modified example.
FIG. 6 is a schematic front view showing the fourth embodiment, FIG. 7 is a schematic front view showing the fifth embodiment, and FIG. 8 is a schematic front view showing the fourth embodiment. It is a schematic front view showing a modification of . 5...Long focus lens, 6...Short focus lens, 4. 1.2.32...Operating member, 7.8,1.
4, 15, 36. 37... Lens vi. Figure 1 Figure 2 National policy
3 Figure b Figure 4M Figure 5 Figure 6 @ Figure 7 Figure 8

Claims (4)

[Claims] (1) In a camera that integrates a photographic lens that can switch the focal length in multiple stages and a strobe, there is an operating member for switching the focal length of the photographic lens between a short focal length side and a long focal length side; In addition to being linked to the operating member, when the operating member is operated to the short focus side, the strobe irradiation angle corresponds to the angle of view on the short focus side, and when the operating member is operated to the long focus side, the strobe irradiation angle corresponds to the angle of view on the short focus side. A variable focus camera with a strobe, comprising: a strobe irradiation angle switching means for adjusting the angle of view to a long focal length side. (2) Operation in which a first lens forming part or all of the long focus side optical system and a second lens forming part or all of the short focus side optical system are attached to a rotating or sliding member. The variable focus camera with a strobe according to claim 1, characterized in that the variable focus camera is a member. (3) When a lens plate corresponding to the angle of view on the short focus side or long focus side of the photographic lens is fixedly provided in the strobe light irradiation aperture, and the photographic lens is switched to the long focus side or short focus side. 2. The variable focus camera with a strobe according to claim 1, wherein the strobe irradiation angle switching means is provided with a separate lens plate superimposed on the lens plate. (4) A first lens plate corresponding to the angle of view on the short focal length side of the photographing lens and a second lens plate corresponding to the angle of view on the long focal length side of the photographing lens are provided, so that the photographing lens has a short focal length. When the photographing lens is switched to a long focus position, the first lens plate is positioned at the strobe light irradiation aperture, and when the photographic lens is switched to a long focal length, the second lens plate is positioned at the strobe light irradiation aperture. The variable-focus camera with a strobe according to claim 1, characterized in that it is a strobe irradiation angle switching means.