JPH09274225A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To separately arrange a Fresnel lens and a reflector in suitable positional relation for light emission and to make them come close to be in a compact state when they are not used by making them come close or separate in accordance with the use or the non-use of a stroboscopic light emission part. SOLUTION: In a state where a lens cover 2 is opened, the Fresnel lens 6 is projected from the lens cover 2 and positioned at a position in an optical axis direction (light emitting position) appropriate to obtain desired light distribution and a desired guide number with respect to the reflector 5. On the other hand, in a state where the lens cover 2 is closed, the lens 6 is moved to come close to the reflector 5 and housed in the lens cover 2. Therefore, the lens cover 2 is made thinner than in the camera in which the Fresnel lens and the reflector are housed in the lens cover while they are fixed at the appropriate positions, so that the camera is made compact when it is carried and the lens cover 2 is prevented from disturbing operation in photographing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a built-in strobe.

[0002]

2. Description of the Related Art A built-in type strobe device is attached to the center or side of the upper part of a camera, and is provided in a retractable manner, that is, it is housed in the outer form of the camera in a housed state, and a light emitting part is lifted up when photographing. It was being done.

By the way, in such a retractable system, the distance between the raised light emitting portion and the optical axis of the photographing lens does not become so large, so in a camera equipped with a high-power zoom lens in recent years, the long focus side is extended and the subject person However, there is a problem that the red-eye phenomenon easily occurs.

Therefore, in order to reduce such a red-eye phenomenon, for example, in Japanese Patent Laid-Open No. 56-87029, the inside of a lens cover rotatably attached in the vertical direction to the upper front edge of the camera body or the like. A flash unit is installed in
When carrying, it can be rotated downward to protect the shooting lens, and when shooting, it can be rotated to the upper side of the camera and the strobe light emitting part should be placed sufficiently away from the lens optical axis. A strobe device capable of doing so has been proposed.

[0005]

However, in the strobe device disclosed in the above publication, the Fresnel lens, the reflecting shade, the fixing member of the Xe tube, etc., which are the components of the strobe light emitting portion, overlap in the thickness direction of the lens cover. There is a problem that the lens cover becomes thick. For this reason, when the lens cover is closed, the entire camera becomes thick and portability deteriorates. Further, when the lens cover is opened, a thick lens cover is present on the upper side of the camera, which is likely to interfere with shooting.

A first object of the present invention is to provide a camera in which the stroboscopic light emitting section can be sufficiently separated from the photographing optical axis and the lens cover and the like for holding the stroboscopic light emitting section can be made thin. is there.

[0007]

In order to achieve the above object, in the first invention of the present application, a camera provided with a stroboscopic light emitting section having a Fresnel lens and a reflecting shade is provided according to whether the stroboscopic light emitting section is used or not. In this way, the Fresnel lens and the reflective shade can be relatively moved toward and away from each other.

That is, when the stroboscopic light emitting section is used as in photographing, the Fresnel lens and the reflection shade are separated so that a predetermined light distribution and a guide number are obtained (light emitting positional relationship), and when the portable device is carried. When the strobe light emitting section is not used as described above, the Fresnel lens and the reflection shade are brought close to each other so that the strobe light emitting section can be stored as compactly as possible.

According to the second aspect of the present invention, when the strobe light emitting portion is held by a strobe holding member such as a lens cover movably attached to the camera body, when the Fresnel lens and the reflection shade come close to each other. Further, the entire strobe light emitting portion is housed in the strobe holding member, and a part of the strobe light emitting portion projects from the strobe holding member when the Fresnel lens and the reflecting shade are separated from each other.

That is, even if the strobe holding member is made thin, it can be completely housed in the strobe holding member by bringing the Fresnel lens and the reflecting shade close to each other, and either the Fresnel lens or the reflecting shade is outside the strobe holding member. By separating them so as to project in, the two can be arranged in a light emitting positional relationship.

Specifically, the reflection shade may be fixed to the strobe holding member, and the Fresnel lens may be held in the strobe holding member so as to be projectable and housed. In this case, the strobe holding member is provided with a biasing member that biases the Fresnel lens in the projecting direction so that when the strobe holding member moves with respect to the camera body, the Fresnel lens is pushed in the housing direction by the camera body. It is desirable to configure it.

When the strobe holding member is attached to the back side of the camera body separately from the lens cover, the Fresnel lens is fixed to the strobe holding member, and the reflection shade can be projected / stored in the strobe holding member. May be held. In this case, the strobe holding member is provided with an urging member for urging the reflecting shade in the projecting direction so that when the strobe holding member moves with respect to the camera body, the reflecting shade is pushed in the housing direction by the camera body. It is desirable to configure it.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIGS. 1 to 6 show a camera according to a first embodiment of the present invention, and FIGS. 1 and 2 show shooting with a lens cover 2 having a built-in strobe light emitting portion opened above the camera. 4 and 5 show a portable state in which the lens cover 2 is closed.

In these figures, 1 is a camera body. A lens cover 2 is attached to the camera body 1 by a hinge 8 so as to be vertically rotatable. A strobe light emitting section 3 is provided at a position apart from the hinge 8 in the lens cover 2. The lens cover 2
Has a hollow structure, and a lead wire (not shown) that connects a battery (not shown) built in the camera 1 and the flash light emitting unit 3 passes through the hinge 8 and the lens cover 2. An unillustrated opening spring that biases the lens cover 2 in the opening direction is housed inside the hinge 8.

A stopper 9 contacts the contact surface 2a of the lens cover 2 which is rotated to a predetermined open position, restricts further rotation of the lens cover 2, and guarantees the light distribution of the strobe. It is a department.

Reference numeral 10 denotes a lens cover lock portion provided in the camera body 1, and has a hook (not shown) which is engageable with a claw 2b provided at the front end of the closed lens cover 2. Reference numeral 10a is a slide type unlocking knob, which is connected to the hook. The lock release knob 10a is urged to the right in the front view of the camera by a spring (not shown), and by manually sliding the lock release knob 10a to the left, the hook is interlocked to release the close lock of the lens cover 2. can do.

Reference numeral 11 denotes a taking lens which is retracted as shown in FIG. 5 while the lens cover 2 is closed and is extended to the taking position as shown in FIGS. 1 and 2 while the lens cover 2 is opened. Reference numeral 12 is a viewfinder objective window, and 13 is a release button.

As shown in detail in FIG. 3, the strobe light emitting section 3 includes a xenon tube 4, a reflecting shade 5, and a Fresnel lens 6.
It consists of. The xenon tube 4 and the reflector 5 are fixed to the lens cover 2.

On the other hand, the Fresnel lens 6 has a lens cover 2
In the open state and the closed state, the photographic lens 11 is held so as to be able to advance and retreat in the optical axis direction, and is urged by a compression coil spring 7 from behind in a direction projecting from the inside of the lens cover 2. The flange portion 6a formed on the outer circumference of the Fresnel lens 6 comes into contact with the inner wall of the lens cover 2 to prevent the Fresnel lens 6 from further projecting. If the xenon tube 4 emits light when the Fresnel lens 6 is located at this protruding position (hereinafter referred to as the light emitting position), a desired light distribution and guide number can be obtained.

When the Fresnel lens 6 is pushed against the urging force of the compression spring 7, the Fresnel lens 6 comes close to the reflection shade 5 and its front surface substantially coincides with the inner surface of the lens cover 2.

Next, the operation of the camera thus constructed will be described. When the lock release knob 10a is operated to release the lock of the lens cover lock portion in the state of being carried (lens cover closed state) shown in FIG. 4, the lens cover 2 moves upward with the hinge 8 as an axis by the opening spring force. Turn to. During this rotation, the taking lens 11 is extended from the retracted state to the taking position.

Further, the Fresnel lens 6, which has been pushed into the lens cover 2 by the camera body 1 until then, projects to the light emitting position by the urging force of the compression spring 7. When the lens cover 2 is rotated to a position where it comes into contact with the stopper portion 9, the flash photographing state (lens cover open state) shown in FIGS. 1 and 2 is obtained.

After photographing, when the lens cover 2 is manually rotated in the closing direction against the hinge-opening spring force, the photographing lens 11 retracts in the middle and is retracted inward from the front surface of the camera body 1. Further, the front surface of the Fresnel lens 6 protruding immediately before the completion of closing the lens cover 2 comes into contact with the camera body 1, and is pushed into the lens cover 2 by the spring force of the compression coil spring 7. Then, the claw 2b of the lens cover 2 enters the lock portion 10 and engages with the hook, so that the lens cover 2 is closed and locked in a state where the inner surface of the lens cover 2 and the front surface of the camera body 1 are in close contact with each other.

As described above, in this embodiment, when the lens cover 2 is opened, the Fresnel lens 6 projects from the lens cover 2 and the proper light for obtaining the desired light distribution and guide number for the reflector 5. Axial position (light emitting position)
On the other hand, when the lens cover 2 is closed, the Fresnel lens 6 moves so as to approach the reflection shade 5 and is completely housed in the lens cover 2.

Therefore, according to the present embodiment, the lens cover can be made thinner than that in which the Fresnel lens and the reflection shade are fixed in proper positions and housed in the lens cover. Can be made compact, and the lens cover can be prevented from becoming an obstacle during shooting.

(Second Embodiment) FIGS. 7 and 8 show a camera according to a second embodiment of the present invention. FIG. 7 shows a photographing state and FIG. 8 shows a portable state. In the present embodiment, the same components as those in the first embodiment will be first described.
It is represented by a code added with the code (numeral) 100 used in the embodiment.

This embodiment is different from the first embodiment in that the stroboscopic light emitting portion 103 is provided on the stroboscopic strut 120 instead of the lens cover. The strobe strut 120 is rotatably attached to the upper rear portion of the camera body 101 via a hinge 108, and in the shooting state, the strobe light emitting unit 10 is provided.
3 is supported at a high position apart from the optical axis of the photographing lens. A Fresnel lens 106 is fixed to the strobe strut 120, and a reflecting shade cover 121, which holds the strobe reflecting shade 105 and the xenon tube 104 inside, is held so as to be movable back and forth in the optical axis direction. Reflective shade cover 12
1 is the Fresnel lens 10 by the compression coil spring 107.
6 is urged in a direction away from (backward in the photographing state), and the brim portion of the reflecting shade cover 121 and the inner surface of the strobe strut 120 having a hollow structure come into contact with each other, so that the reflecting shade cover 121 is further rearwardly moved. Is prevented from protruding. When the reflection shade cover 121 is located at this protruding position (hereinafter, referred to as a light emitting position), a desired light distribution and a guide number can be obtained in the strobe light emitting unit 103.

Then, when the strobe strut 120 is rotated downward about the hinge 108 as an axis, the reflection shade cover 121
The top portion of the reflector comes into contact with the back surface of the camera body 101, and the reflection shade cover 121 is completely housed in the strobe strut 120 against the bias of the compression coil spring 107. Strobe support 1
The claw 120b at the tip of 20 is engaged with a lock portion (not shown) provided on the back surface of the camera body 101 to lock and hold the state of FIG.

By disposing the strobe strut 120 away from the viewfinder eyepiece (not shown), the release button, etc., it is possible to avoid the strobe strut 120 from interfering with photographing as much as possible.

(Relationship Between the Present Invention and Embodiments) In the above embodiment, the Fresnel lenses 6 and 106 are the Fresnel lenses according to the present invention, the reflection shades 5 and 105 are the reflection shades according to the present invention, and the lens cover 2 is used. Also, the strobe strut 120 serves as the strobe holding member according to the present invention, the compression coil spring 7,
107 respectively correspond to the urging member according to the present invention.

The above is the correspondence relationship between each configuration of the present invention and each configuration of the embodiment, but the present invention is not limited to the configuration of these embodiments, and the mechanism or the embodiment shown in the claims. Any structure may be used as long as the function of the structure can be achieved.

Further, the present invention may be used by combining the above-described embodiments and modified examples, or their technical elements as needed.

Further, the present invention can be applied to various forms of cameras such as a single-lens reflex camera, a lens shutter camera, a video camera and the like, and further optical devices other than the camera and other devices, and those cameras and the like. It can also be applied to devices applied to optical devices and other devices or elements constituting these devices.

[0034]

As described above, according to the first invention of the present application, the Fresnel lens and the reflecting shade can be relatively brought close to or apart from each other depending on the use / non-use of the stroboscopic light emitting section. I am configuring. Therefore, according to the present invention, when the stroboscopic light emitting section is used as in the case of photographing, the Fresnel lens and the reflection shade can be separated and arranged in a positional relationship suitable for light emission, while in the case of carrying the apparatus. When the strobe light emitting part is not used, the strobe light emitting part can be compactly housed by bringing the Fresnel lens and the reflection shade close to each other.

Further, in the second aspect of the present invention, when the Fresnel lens and the reflecting shade are close to each other, the entire strobe light emitting portion is housed in the strobe holding member, and when the Fresnel lens and the reflecting shade are separated from each other, the strobe emitting portion is separated. Is configured so that a part thereof protrudes from the strobe holding member. Therefore, according to the present invention, even if the strobe holding member is made thin, it can be completely housed in the strobe holding member by bringing the Fresnel lens and the reflecting shade close to each other. By separating them so as to project outside the strobe holding member, both can be arranged in a positional relationship suitable for light emission. Therefore, a strobe holding member such as a lens cover can be made thin, and it is possible to realize a camera that is compact when being carried and that does not interfere with shooting during shooting.

[Brief description of drawings]

FIG. 1 is a perspective view of a camera (lens cover opened state) according to a first embodiment of the present invention.

FIG. 2 is a side view of the camera.

FIG. 3 is a cross-sectional view of a strobe light emitting portion (projected state) of the camera.

FIG. 4 is a perspective view of the camera (lens cover closed state).

FIG. 5 is a side view of the camera.

FIG. 6 is a cross-sectional view of a strobe light emitting portion (stored state) of the camera.

FIG. 7 is a side view (partial cross section) of a camera (strobe strut up state) according to a second embodiment of the present invention.

FIG. 8 is a side view (partial cross-section) of the camera of the second embodiment (state in which the strobe strut is lowered).

[Explanation of symbols]

 1, 101 ... Camera body 2 ... Lens cover 3, 103 ... Strobe light emitting section 4, 104 ... Xenon tube 5, 105 ... Reflector shade 6, 106 ... Fresnel lens 7, 107 ... Compression coil spring 8, 108 ... Hinge section 120 ... Strobe Prop 121 ... Strobe reflector cover

Claims (8)

[Claims] 1. A camera provided with a strobe light emitting section having a Fresnel lens and a reflecting shade, wherein the Fresnel lens and the reflecting shade move relative to each other depending on whether the strobe emitting section is used or not. Characteristic camera. 2. A camera in which a strobe light emitting portion having a Fresnel lens and a reflecting shade is held by a strobe holding member movably attached to a camera body, wherein the Fresnel lens and the reflecting shade are relatively close to each other. The camera, wherein the strobe light emitting portion is housed in the strobe holding member, and the Fresnel lens and the reflection shade are relatively separated from each other, and the strobe light emitting portion projects from the strobe holding member. 3. The camera according to claim 2, wherein the reflection shade is fixed to the strobe holding member, and the Fresnel lens is held by the strobe holding member so as to be projectable and housed. . 4. The strobe holding member includes a biasing member that biases the Fresnel lens in a protruding direction, and the Fresnel lens is provided when the strobe holding member moves with respect to the camera body. The camera according to claim 3, wherein the camera body is pushed in the storage direction. 5. The camera according to claim 3, wherein the strobe holding member is a lens cover for protecting a photographing lens. 6. The strobe holding member according to claim 2, wherein the Fresnel lens is fixed to the strobe holding member, and the reflecting shade is held by the strobe holding member so as to be capable of projecting and retracting. camera. 7. The strobe holding member includes an urging member that urges the reflecting shade in a protruding direction, and the reflecting shade is provided when the strobe holding member moves with respect to the camera body. 7. The camera according to claim 6, wherein the camera body is pushed in the storage direction. 8. The camera according to claim 6, wherein the strobe holding member is a pillar-shaped member attached to the back side of the camera body.