JPS632030A - Lens shutter type zoom lens camera - Google Patents

Abstract

PURPOSE:To vary a visual field, and also, to make an irradiation angle of a stroboscopic device variable by providing a cam groove for moving a variable power lens group and a light emitting tube, on a single movable plate which has been provided on the upper part of a finder optical system and the stroboscopic type, and allowing the cam plate to interlock with zooming. CONSTITUTION:A cam plate 53 is positioned on the upper part of a finder device 8 and a stroboscopic device 9 and slidable in the right and left directions, and the cam plate 53 is provided with a variable power cam groove 55 for the finder device 8, a parallax correcting cam groove 56, and a stroboscope can groove 57 for the stroboscopic device 9. On guide projections 66a-68a, driven pins 69-71 are provided vertically, respectively, and these driven pins are fitted to the variable power groove 55, the parallax correcting cam groove 56 and the stroboscope can groove 57, respectively. Accordingly, when the cam plate 53 moves to the right and left, a variable power lens frame 66, a deflection angle prism operating plate 67, and a stroboscope case 68 move forward and backward, respectively, in accordance with a shape of these cam grooves 55-57.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a lens-shutter camera equipped with an autofocus function, and in particular uses a motor-driven zoom lens system as a photographing optical system, and also uses a motor-driven zoom lens system as a photographing optical system. The present invention relates to a triple zoom camera in which a flash system and a strobe device cooperate in accordance with operations such as magnification change.

"Prior Art and its Problems" Many autofocus lens-shutter cameras have been known in the past, but conventional products generally cannot change the focal length of the J11 shadow optical system. In the - part, there are also known bifocal length lens shutter cameras in which a focal length changing lens can be inserted and removed within the photographic optical system. Only two focal lengths can be used and no intermediate focal length can be covered. For this reason, the reality is that drawing using a zoom lens is limited to -eye reflex cameras. However, the -eye reflex camera
Compared to lens-shutter cameras, they are more expensive and less expensive.
It is also heavy and a burden for beginners or intermediate users to use. Particularly for travelers who want to minimize the weight of their mobile phones, such as when traveling outside of a DJ, or for female users, even if eye reflex cameras are recognized for their excellent depiction, they are avoided due to their large size and heavy weight. There is a side to it. In such a case, the user will select a lens-shutter camera that is lightweight and compact, but whose focal length cannot be changed or whose focal length can be changed in only two steps.

In other words, it is common knowledge that in current lens-shutter cameras, the focal length cannot be changed, or can only be changed in two steps, and users accept this and use lens-shutter cameras. I'm looking for it. However, if a lens-shutter camera equipped with a zoom lens were to be put into practical use, it would have a great impact on society, and it is expected that it would be able to attract even more users. In other words, users who think that eye reflex cameras are too large and current lens-shutter cameras are unsatisfactory.

``Object of the Invention J The present invention is based on the above-mentioned analysis of the current situation regarding eye reflex cameras and lens-shutter cameras, and is an autofocus lens-shutter camera equipped with a zoom lens, which is a compact lens-shutter camera with zooming power. An object of the present invention is to obtain a camera with a simple structure, in particular, since the field of view of a finder optical system and the irradiation angle of a strobe device are changed in conjunction with changes in the focal length of a zoom lens system. The purpose is to obtain a device that operates reliably.

"Summary of the Invention" The present invention comprises a distance measuring device, a photographing optical system driven in response to a distance signal from the distance measuring device, and a finder optical system comprising an optical system separate from the photographing optical system. In a lens-shutter camera equipped with a strobe device, the photographing optical system is a focus + Jr! It consists of a zoom lens system that has a movable variable magnification lens group that continuously changes the grass, and the Faida optical system has a movable variable magnification lens group that continuously changes the Faida field of view according to the focal length of the zoom lens system. In addition to the variable magnification viewfinder optical system, the strobe device consists of a variable illumination angle strobe device that has a movable arc tube that changes the strobe illumination angle according to the focal length of the zoom lens system, and further includes a variable magnification lens group of the zoom lens system. A zoom motor that moves the zoom finder optical system and a variable illumination angle strobe device so as to be movable in the left and right directions, and is moved in conjunction with the zoom movement of the zoom lens system by the zoom sensor. With a single cam plate:
The variable magnification lens group of the variable magnification finder optical system and the driven pin provided integrally with the arc tube of the variable illumination angle strobe device; The variable magnification cam groove formed on the cam plate into which both driven pins fit, and the strobe. The variable magnification cam groove and strobe cam groove change the field of view of the variable magnification finder optical system and the strobe illumination angle of the variable illumination angle strobe device in conjunction with changes in the focal length of the zoom lens system. The feature is that it is made to do.

“Embodiment J of the invention The invention will now be described with reference to illustrated embodiments.

The lens shutter camera of the present invention, as shown schematically in FIG. 1, includes a lens barrel block 1 of a zoom lens,
Finder and strobe block (hereinafter simply referred to as finder block) 2) Distance measuring device (includes a light emitting unit 3 and a light receiving unit 4 of an AP display device, and a zoom motor 5 for zooming. These elements are used to fix the camera body. It is fixed on a base plate 6 (see FIGS. 2 to 4) which serves as a section.

That is, the base plate 6 is a lens barrel support plate portion 6 that is perpendicular to the optical axis.
a, a horizontal support plate portion 6b formed by bending the upper end of the lens barrel support plate portion 6a at a right angle, and a motor support plate portion 6c forming a right angle to the horizontal support plate portion 6b. The lens barrel block 1 is supported by the support plate portion 6a. Further, a zoom motor 5 located at the center of the upper part of the lens barrel block 1 is fixed to the motor support plate part 6c, and a light emitting part 3 and a light receiving part 4 fixed to the horizontal support plate part 6b are arranged on both sides of the zoom motor 5. is located. The finder block 2 is fixed to the front right side of the horizontal support plate portion 6b. 6e is a gear train support plate fixed to the motor support plate portion 6c via a spacer 6f.

First, the structure of the lens barrel block 1 driven by the zoom motor 5 will be explained with reference to FIGS. 6 to 8.

This lens barrel block l is used for macro [2] in addition to zooming.
It has a function.

A rear fixing plate 11 is fixed to the lens barrel support plate portion 6a of the base plate 6 via a fixing screw 1o. Four guide rods 12 are fixed to the rear fixing plate 11 and are located parallel to and around the optical axis, and a front fixing plate 13 is fixed to the tips of the guide rods 12. The above is lens barrel block 1
is the main fixed element of

A cam ring 14 is located between the rear fixing plate 11 and the front fixing plate 13.
is rotatably supported, and a gear 15 that engages with the pinion 7 fixed to the drive shaft 5a of the zoom motor 5 directly or through a gear train is fixed to the outer periphery of the cam ring 14 with a fixing screw 15a (Fig. 6). has been done. This gear 15
is a sector gear that covers the rotation range of the cam ring 14. Cam ring 14 is for the front group? Zooming cam grooves 20 and 21 for the tz group are cut.

FIG. 7 is a developed view of the zooming cam groove 20.21, and the zooming cam groove 21 for the rear group has a wide-angle end fixed section 21a, a variable power section 21b, and a telephoto end fixed section 21c. On the other hand, the zooming cam groove 20 for the front group has a barrier opening/closing section 20a that opens and closes the barrier 31 of the barrier block 30.
, lens storage section 20b, wide-angle end fixed section 20c, zooming section 20d, telephoto end fixed section 20e, macro feed section 2
0f, and a mouth end fixed section 20g. The rotation angle of each of these sections is such that the total angle θl of the barrier opening/closing section 20a, the lens storage section 20b, and the wide-angle end fixing section 20c of the zooming cam groove 20 is equal to the angle θl of the wide-angle end fixing section 21a of the zooming cam groove 21. are the same,
The angle θ2 of the variable magnification section 20d and the variable magnification section 211) is the same, the telephoto end fixed section 20e, the macro feed section 20f,
The total angle θ3 of the macro fixed section 20g is the same as the angle θ3 of the telephoto end fixed section 21c. The specific zooming range of this example is 35III11 to 70m.
It is 1.

These zooming cam grooves 20 and 21
In this case, the n "Gunsui 1" is movably fitted on the guide rod 12.
6 and the roller 19 of the rear group frame 18 are fitted. A decorative frame 22 is attached to the front group frame 16 via a fixing screw 2'2a.
is fixed, and further a shutter block 23 is fixed. The correction group lens frame 24 holding the BE lens L1 is connected to the shutter block 23 and the helicoid 25.
It also has an arm 24a that engages with the lens extension lever 23a of the shutter block 23. Therefore, when the lens feeding lever 23a rotates in the circumferential direction and the front group lens frame 24 rotates accordingly, the front group lens frame 24 moves along the helicoid 25 in the optical axis direction. The rear group lens L2 is directly fixed to the rear RT frame 18.

The shirt tab block 23 itself is well known. A built-in pulse motor rotates the lens extension lever 23a by an angle corresponding to a distance measurement signal from a distance measurement device having a light emitting section 3 and a light receiving section 4, and further closes the closed shutter (sector) 23b for a predetermined period of time. After opening and closing again,
The lens extension lever 23a is returned to its original position.

The present invention uses the zoom motor 5 not only as a driving source for zooming, but also as a driving source for driving the finder device 8 and strobe device 9 of the finder block 2 in conjunction with zooming. That is, as shown in FIG. 1, the finder device 8 and strobe device 9 included in the finder block 2 change the viewfinder field of view in conjunction with changes in the focal length of the lens barrel block 1, and change the illumination angle of the strobe. (light intensity).

A pinion 50 different from the pinion 7 is meshed with the gear 15 of the cam ring 14, and this pinion 5C1
:ll1i11+51 is extended in the direction tangential to the base plate 6, and a speed reduction gear train 52 is provided at its rear end. A final gear 52a of the reduction gear train 52 meshes with a rack 53a of the cam plate 53. The cam plate 53 is located above the finder device 8 and the strobe device 9 and is movable in the left and right directions, and the tip (lower end) of the downwardly bent portion 53b at the rear end.
A rack 53a is integrally provided in the. Reduction gear train 5
2 is for decelerating the rotation of the gear 15, reducing the movement of the cam ring 14, and applying it to the cam plate 53. Cam plate 5
3 is provided with a variable magnification cam groove 55 for the finder device 8, a parallax correction cam groove 56, and a strobe cam groove 57 for the strobe device 9.

The lens system of the finder device 8 is basically as follows.

Fixed object side lens group L3 and eyepiece lens group L4,
and a movable variable magnification lens group L5, and further includes a deflection prism P1 for macro photography. The variable magnification lens group L5 interferes with the photographic screen by the variable magnification operation of the lens barrel block 1 and the field of view by the finder device 8, and the deflection prism PI moves onto the optical axis only during macro photography and is particularly useful for Correct parallax. In other words, in a lens-shutter camera, variation is unavoidable, and the amount of variation increases the closer you shoot, but the zoom lens camera of this embodiment has a macro effect! 19 JJ2 is possible.

At this time, the amount of vararax increases, so only during macro photography, a wedge-shaped deflection prism PI with a thicker bottom and a thinner upper part is inserted into the optical path to bend the optical path in the direction of F to capture the part closer to the photographed area. I'm making it observable. FIG. 16 schematically shows the optical path when the deflection prism P1 is inserted.

In addition, the strobe device 9 narrows down the irradiation angle as the focal length of the photographing lens becomes longer, that is, as the lens extends.
During macro photography, the illumination angle is widened to reduce the amount of light hitting the subject. Therefore, in this embodiment, the Fresnel lens L6 is fixed, and the reflective shade 59 holding the xenon lamp 58 is moved in the optical axis direction.

FIGS. 9 to 16 show specific structural examples for imparting the above-described movements to the finder device 8 and strobe device 9. A finder main plate 60 is fixed on the finder block 54 fixed to the base plate 6, and a guide pin 62 that fits into the linear guide groove 61 of the cam plate 53 is fixed to the finder main plate 60. The cam plate 53 includes the linear guide groove 61 and the guide pin 62, as well as a finder main plate 60 that suppresses the front part of the cam plate 53 from rising up.
With the restraining guide 60a formed as a cut and raised piece,
The snake regulates the direction of movement to the left and right (Figures 9 and 10).

A variable magnification lens guide groove 63 in the surface direction, a declination prism guide groove 64, and a strobe guide groove 65 are cut in the finder main plate 60, and the variable magnification lens guide groove 63 has a variable magnification lens group L5. The guide protrusion 66a of the supported variable magnification lens frame 66 is fitted, the guide protrusion 67a of the IQ angle prism operating plate 67 is fitted into the declination prism guide groove 64, and the reflector 59 is fixed to the strobe guide groove 65. The guide protrusion 68a of the strobe case 68 is fitted,
The movement direction of the stiff oath is regulated in the front-back direction. Driven pins 69, 70, and 71 are implanted in the guide protrusions 66a, 67a, and 68a, respectively, and these driven pins are connected to the variable magnification cam groove 55, the variax correction cam groove 56, and the variax correction cam groove 56, respectively. It fits into the strobe cam groove 57. Therefore, when the cam plate 53 moves left and right, the variable magnification lens frame 66, deflection prism operating plate 67, and strobe case 68 move according to the shapes of these cam grooves 55, 56, and 57, respectively. It will move to t<.

Each section of the variable power cam groove 55, balax correction cam groove 56, and strobe cam groove 57 is shown in the cam ring 1 in FIG.
This corresponds to each section described for the zooming cam grooves 20 and 21 of No. 4. That is, the variable magnification cam groove 55 has a wide-angle end fixed section 55a, a variable magnification section 55b, and a telephoto end fixed section groove 55c, and the angle θ[, θ2 of each of these sections is
) θ3 corresponds to FIG. On the other hand, the balax correction cam groove 56 has a non-protruding section 56a.

It has a protrusion movement section (macro delivery section) 56b and a protrusion position fixed section (mouth end fixed section) 56C. The strobe cam groove 57 includes a wide-angle end fixed section 57a, a variable power section 57b,
It has a telephoto end fixed section 57c, a macro feeding section 57d, and a macro mouth end fixed section 57e.

The variable magnification lens frame 66 supporting the variable magnification lens group L5 has a first
As shown in FIG. 3, it is movably supported in a suspended manner on a guide 54a of the finder block 54. When this moves according to the variable magnification cam groove 55, the subject side lens group 3, the eyepiece lens group L4, and the variable magnification lens group L
The magnification of the finder optical system including 5 changes, and the photographing range by the lens barrel block 1 and the finder field of view almost match. Such an optical system can be obtained using simple lens design techniques.

The deflection prism P1 is operated by a deflection prism actuating plate 67 as shown in FIGS. 14 to 16. First, the deflection prism P1 made of synthetic resin is rotatably supported by the finder block 54 at fulcrum pins 74 at its lower ends on both sides. A biasing torsion spring 75 is hooked and rotated on the fulcrum pin 74, and one end of this torsion spring 75 is stopped by a position regulating piece 76 fixed to the side surface of the deflection prism P1. is normally biased so that it is located within the optical path of the subject-side lens group 3 to variable magnification lens group L5. Location regulation! 9176 is located within the arc-shaped escape groove 79 formed in the finder block 54. Further, the deflection prism actuating plate 67 is fixed between the finder block 54 and a guide plate 80 fixed thereto, and the guide pin 81 implanted on the side surface of the declination prism actuating plate 67 is inserted into the linear guide groove 82 formed in the finder block 54. It's stuck.

Position guide: The v1 piece 76 can engage with a rotation prevention surface 77 and a rotation surface 78 of the deflection prism operating plate 67. When the driven pin 70 is in the non-protruding section 56a of the balax correction cam groove 56, the deflection prism actuating plate 67 brings its rotation prevention surface 77 into contact with the position regulating piece 76, and resists the force of the torsion spring 75. The deflection prism P1 is resisted and retreated from the optical path, but when the driven pin 70 reaches the protruding movement section 56b, the position of the rotating surface 78 is restricted! Make it compatible with F176.

Then, the deflection prism P1 rotates into the optical path due to the force of the torsion spring 75, and its position regulating piece 76 moves toward the rotation surface 7.
8, it gradually protrudes into the optical path as shown in FIGS. 15 and 16, bends the finder optical path as shown in the same figure, and brings the object below into the field of view. In other words, it reduces variation during macro photography.

As shown in FIG. 18, on the side surface of the strobe case 68, there is a linear guide groove 84 formed in the guide plate 80 in the front and rear direction.
A guide block 85 is provided which fits into the guide block 85. Moreover, height adjustment ribs 86 (FIG. 11, FIG. 17) long in the front-rear direction are provided on the upper and lower sides of the strobe case 68 to prevent the strobe case 68 from falling down. Therefore, this strobe case 68 follows the shape of the strobe cam groove 57 when the cam plate 53 moves left and right. &do. The variable magnification section 57b of the strobe cam groove 57 is a section in which the xenon lamp 58 is retreated with respect to the Fresnel lens L6. This acts to substantially increase the guide number that is not available. The other macro feeding section 57d
In contrast, the illumination angle is widened and the guide number in the macro Ill shadow is made substantially smaller.

The distance measuring device (AP device) will be explained as follows with reference to FIGS. 19 to 22. Various types of distance measuring devices having a light emitting section 3 and a light receiving section 4 are conventionally known, but in the present invention, a position detecting element (for example, P
A type based on the triangulation principle using SD) is used.

FIG. 19 is a conceptual diagram thereof, in which the light emitting section 3 is equipped with a light source such as an LED [
3a and a light projecting lens 3b, the light receiving section 4 includes a light source 3a and a light projecting lens 3b.
The PSD 4a, which is separated by the baseline length, and the light receiving lens 4
It is equipped with b. While the COD consists of a large number of light receiving elements, the PSD4a is a single elongated light receiving element as is well known, and has - common terminals (cathode) C and two terminals with different polarities from the common terminal C. (Anode) Has A and B.

In this distance measuring device, when the light source 3a emits light and the reflected light reflected by the object is incident on the PSD 4a, the position of the light hitting the light receiving surface varies depending on the distance to the object 0, and the terminal A
, B, a photocurrent is generated corresponding to the position of the light spot. Therefore, by measuring this photocurrent, the distance to the subject can be determined.

The above is the distance measurement principle of triangulation distance measurement using the PSD4a.

Based on this ranging data, the shutter unit 23 described above
By applying an operation signal to the camera, automatic focusing can be performed in the entire zooming range. That is, when a drive pulse based on distance measurement data is applied to the pulse motor of the shutter unit 23, the lens sand release lever 23a rotates by an angle corresponding to the pulse.
The group lens frame 24 is rotated together. Therefore, by the helicoid 25, the front group lens frame 24 (front group lens Ll)
The lens moves in the optical axis direction so that it is in focus.

The distance measuring accuracy of the distance measuring device based on the triangular distance measuring principle depends on the distance between the light emitting section 3 and the light receiving section 4, that is, the base line length. Therefore, it is preferable to make the distance between the two as large as possible. In this embodiment, this base line length is increased, and a zoom motor 5 is disposed between the light emitting section 3 and the light receiving section 4 that result from the increased length.

As described above, the lens shutter type camera of the present invention has a zooming cam groove 20f in the cam ring 14 that moves the front group lens L1 further in a rectangular direction from the telephoto end (extends a).
is provided. During this macro photography, if the distance measuring device using the light emitting section 3 and the light receiving section 4 is operated as is, the reflected light from the subject at the close position will not enter the PSD 4a. That is, since distance measurement is not possible, a drive signal (distance measurement data) cannot be given to the shutter block 23. The distance measuring device of this embodiment has a novel configuration for correctly detecting the subject position even during macro photography. The distance measuring device used during macro photography will be explained with reference to FIGS. 20 to 22.

On the front of the light receiving unit 4 of the distance measuring device, there is a
A short distance correction optical element 4e consisting of a prism 4C having two total reflection surfaces and a mask 4d advances. The prism 4C has the effect of optically extending the base line length of the distance measuring device and the effect of refracting light rays. The mask 4d is for blocking light other than the necessary optical path, and has an aperture 4f on the subject side,
It has an opening 4g on the side of the light receiving lens 4b. The aperture 4f is opened in the shape of a slit at a distance f41 on the side away from the optical axis of the light emitting lens 3b with respect to the optical axis of the light receiving lens 4b, and the aperture 4g is located at the optical axis position of the light receiving lens 4b. A corresponding slit is opened.

According to this configuration, during close-up photography, as shown in FIG. 21, the effect of the prism 4C causes the optical axis of the light-receiving lens 4b of the distance measuring device to be translated by 2 in the direction of the baseline length, and at a finite distance, The optical axis of the light receiving lens 4b and the optical axis of the light projecting lens 3b can be made to intersect.

In this way, according to the present short distance correction device which not only refracts the distance measuring beam but also moves it in parallel by 1 in the direction of the baseline length, the PS for the subject distance is calculated by setting the baseline length to L+42.
While increasing the amount of deviation of the spot image on DJa,
Angle δ of prism 4C! By appropriately setting the refractive index, etc., the correct subject distance can be detected.

Therefore, based on this distance measurement data, the shutter block 23
By driving the camera, it is possible to obtain a photograph with correct focus even in macro TLL shadows.

As shown in FIGS. 1 to 4, this short-distance correction optical element 4e is fixed to one end of an arm 42 pivotally connected to the base plate 6 by a shaft 41 located below the light receiving section 4.
An interlocking protrusion 43 is integrally provided at the other end of the arm 42 . This arm 42 maintains its linearity when no external force is applied to it, but has the flexibility to elastically deform when an external force is applied to it. Also, the short distance correction optical element 4e
is normally biased to rotate in a direction to retreat from the front of the light receiving section 4 by a tension spring 46 .

The cam ring 14 is provided with an advancing protrusion 44 that engages with the interlocking protrusion 43 to advance the short distance correction optical element 4e to the front surface of the light receiving section 4 when the cam ring 14 rotates to the third position of the macro 1. There is. The protrusion protrusion 44 extends from the optical element 4e.
Although the position and shape are determined so as to rotate the light receiving part 4 more than the m1 plane, the short distance correction optical element 4e
The end of rotation caused by the advancing protrusion 44 is regulated by the side surface of the gear support plate 6e integrated with the base plate 6, and the overcharge caused by the advancing protrusion 44 is absorbed by the flexibility of the arm 42.

According to the above structure, when the cam ring 14 rotates to the macro photography position, the short distance correction optical element 4e can be automatically positioned in front of the light receiving section 4.

A drive signal from the distance measuring device having the light emitting section 3 and the light receiving section 4 to the shutter block 23 is sent via a flexible printed circuit board (FP (J$ board), not shown).

This flexible printed circuit board is bent and arranged inside the cam ring 14 so that it can be extended and folded with sufficient margin in the entire movement range of the front group lens L1 and the rear group lens L2.

"Effects of the Invention" As described above, the present invention configures the photographing lens system from a zoom lens system, powers the zooming, and
In a lens-shutter zoom lens camera with a variable magnification finder optical system and variable illumination angle strobe device that are linked to zooming, the finder optical system and strobe device can be positioned above the finder optical system and strobe device and moved in the left and right direction. with a single cam plate,
This cam plate is provided with cam grooves for moving the variable magnification lens group of the variable magnification finder optical system and the light emitting tube of the variable illumination angle strobe device, and the cam plate is also moved left and right in conjunction with zooming. It is something. Therefore, with a simple configuration using a single cam plate, the field of view of the finder optical system can be changed in conjunction with zooming.
Moreover, the irradiation angle of the strobe device can be changed.

In addition, the cam plate is equipped with a rack at the lower bent part of its rear end, and by meshing this rack with the zooming gear train, space can be used effectively. A lightweight lens-shutter zoom lens camera can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a conceptual perspective view of the main elements showing an embodiment of the lens-shutter camera of the present invention. 3 is a plan view of FIG. 2, FIGS. 4 and 5 are sectional views taken along lines rV-■ and V-V of FIG. 2, respectively. Figure 6 is a vertical sectional view of the lens barrel block, Figure 7 is a developed view of the cam ring's cam groove for the rear group and the cam groove for the rear group, Figure 8 is an exploded perspective view of the lens barrel block, and Figure 9 is the finder block. Fig. 10 is a cross-sectional view taken along x-x4;t in Fig. 9;
The figure is a rear view of Fig. 9, Fig. 12 is a plan view of Fig. 9 with the cam plate and finder main plate removed, Fig. 13 is a sectional view taken along the xtn-xm line of Fig. 9, and Fig. 14 The figure is a sectional view taken along the XTV-XTV line in Fig. 13, Fig. 15 is a sectional view in a different operating state from Fig. 14, and Fig. 16 is a sectional view of the deflection prism in Fig. 15 with the operating plate removed. Fig. 17 is a front view similar to Fig. 13 showing the state when the angle prism is inserted; Fig. 18 is a sectional view taken along the line X-xvm in Fig. 17; Figure 19 is a conceptual diagram of a distance measuring device based on the triangulation principle, Figure 20 is a conceptual diagram of the distance measuring device of Figure 9 with a short distance correction optical element inserted, and Figure 21 is a conceptual diagram of the distance measuring device of Figure 20. An enlarged view of the distance correction optical element, and FIG. 22 is a front view thereof. DESCRIPTION OF SYMBOLS 1... Lens barrel block, 2... Finder and strobe block, 3... Light emitting section, 4... Light receiving section, 5...
... Zoom motor, 6... Base plate, 6a... Lens barrel support plate section, 6b... Horizontal support plate section, 6C... Motor support plate, 7... Pinion, 8-... Change Double finder optical system, 9... Variable illumination angle strobe device, 14... Cam ring, 16... Front group frame, 18... Rear group frame, 20.2
1... Zooming cam groove, 23... Shutter block, 25... Helicoid, 53-... Cam plate, 53a
. . . downward bending portion, 53b . . . rack, 55 . . . variable magnification cam groove, 54 .
... Strobe cam groove, 58-- Reflector shade, 59... Luminous tube, 69.70.71... Follower pin, L 5-...
Variable magnification lens group. Figure 2 Figure 3 Figure 4 Figure 5 1-01÷62+63- ( Figure 7 Figure 8 Figure 11 Figure 12 Figure 13 figure

Claims (2)

[Claims] (1) A distance measuring device, a photographing optical system driven according to a distance signal from the distance measuring device, a finder optical system consisting of an optical system different from the photographing optical system, and a strobe device. In the lens-shutter type camera, the photographing optical system is composed of a zoom lens system having a movable variable magnification lens group that continuously changes the focal length, and the finder optical system adjusts the field of view according to the focal length of the zoom lens system. The strobe device consists of a variable magnification finder optical system having a movable variable magnification lens group that continuously changes the focal length of the zoom lens system. a strobe device, further comprising a zoom motor for moving the variable magnification lens group of the zoom lens system; a zoom motor disposed above the variable magnification finder optical system and the variable illumination angle strobe device so as to be movable in the left-right direction; A single cam plate that is moved in conjunction with the magnification changing operation of the zoom lens system is provided integrally with the variable magnification lens group of the variable magnification finder optical system and the arc tube of the variable illumination angle strobe device. and a variable power cam groove and a strobe cam groove formed on the cam plate into which both of the driven pins fit, and the variable power cam groove and the strobe cam groove respond to changes in the focal length of the zoom lens system. A lens-shutter zoom lens camera configured to change the field of view of a variable magnification finder optical system and the strobe irradiation angle of a variable irradiation angle strobe device in conjunction with each other. (2) In claim 1, the cam plate has a rack extending in the left-right direction on a downwardly bent portion formed at its rear end, and the zoom lens A lens-shutter zoom lens camera that is linked to the system.