JPH0531633Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mechanism for inserting and removing a built-in strobe light emitting section of a single-lens reflex camera in which a strobe device is integrated (built-in) into the camera body.

[Conventional technology] Single-lens reflex cameras with interchangeable lenses have
Some cameras have a strobe device integrated (built-in) into the camera body, and the light emitting section is installed in the film rewinding section or the pentaprism section.

Single-lens reflex cameras, particularly single-lens reflex cameras with interchangeable lenses, can photograph objects ranging from very close objects to very distant objects, and are often replaced with lenses of a desired focal length. Especially in recent years, with the improvement in the performance of zoom lenses,
An increasing number of people are regularly using zoom lenses that can cover a wide-angle to medium-telephoto shooting range instead of standard lenses. Generally, with a zoom lens, even if the focal length is adjusted to be short (to a wide-angle shooting range), the overall length of the lens barrel remains the same.

Therefore, when a strobe device is built into a single-lens reflex camera, it is necessary to prevent the strobe light from being eclipsed by the lens barrel.

[Problem to be solved by the invention] However, the light emitting part of the built-in strobe of conventional single-lens reflex cameras of this type projects almost upwards from the camera body, so depending on the lens used, the strobe light may not be emitted. However, due to the lens barrel, vignetting may occur and the entire surface of the subject may not be illuminated.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide an in/out mechanism for a built-in strobe light emitting section in which the strobe light is not obscured by the lens barrel.

[Means for solving the problem] In order to solve the above problem, in the present invention,
A storage chamber provided above the front part of the pentaprism section is equipped with a light emitting section via a lifting mechanism, and a storage position in which the light emitting section is concealed and buried in the storage chamber, and a storage position closer to the subject than this storage chamber, and The light emitting position is moved diagonally forward and upward away from the photographing optical axis.

The lifting mechanism includes a guide plate protruding from both sides of the rear upper part of the storage chamber, and leg levers rotatably supported on both sides of the front upper part of the storage chamber,
A guide pin installed in the rear side of the light emitting part is inserted into a guide groove bored in the guide plate, and the tip of the leg lever can be freely rotated through a pin provided in the middle of the side face of the light emitting part. It was attached to the shaft. A tension spring is attached to the leg lever to rotate and bias the light emitting part in a direction that always raises the light emitting part, and a locking mechanism is further provided to lock the leg lever when the light emitting part is located in the storage chamber.

The locking mechanism includes a locking lever that is swingably supported on a side wall of the storage chamber and has a hook at one end that engages with the pin when the light emitting section is in the storage position, and a locking lever that is attached to the rear surface of the camera body. a slider provided to be slidable up and down, a connecting rod pivotally supported on the inner surface of the pentagonal prism portion to connect the slider and the locking lever, and the hook engaged with the pin. and a spring attached to the connecting rod so as to always bias the locking lever in the direction.

[Function] When the built-in strobe is not in use, the light-emitting part is concealed and buried in the storage chamber and is cut off from the outside world, making it possible to create a structure that does not expose the light-emitting part to the exterior, and also prevents direct collision with objects or It is protected from unforeseen situations such as staining due to dust and raindrops. Furthermore, when using the built-in strobe, the light emitting part rises diagonally forward and upward, away from the photographic optical axis, and moves toward the subject rather than the storage chamber, eliminating vignetting of the strobe light caused by the lens barrel. The height can be lowered.

[Example] An example of the present invention will be described below with reference to the attached drawings.

FIGS. 1 and 2 are center vertical cross-sectional views of the main parts of a single-lens reflex camera to which an embodiment of the present invention is applied, in a vertical plane including the photographing optical axis.

In the figure, 10 is a pentaprism for the finder optical system, which is housed in a pentahouse housing 12. Reference numeral 14 denotes a lamp support as a light-emitting portion having a light source consisting of a xenon tube, a reflecting mirror, and a windshield/dustproof glass (not shown). A storage chamber 16 for the lamp support 14 is provided so as to straddle the central ridgeline on the front upper surface of the pentaprism 10.

The lamp support 14 is supported by the pentahouse housing 12 and, by extension, the camera body, by leg levers 18 (however, only one is shown) located on both sides thereof. That is, one end of the leg lever 18 is
It is rotatably supported by a pin 20 in the middle of the side surface of the lamp support 14 . In addition, the leg lever 18
is rotatably supported on the pentahouse casing 12 by a rotating support shaft 22 slightly inside the other end. At least one of the two leg levers 18 is provided with an engagement protrusion 24 on the opposite side of the pin 26 with the rotation support shaft 20 in between, and this engagement protrusion 24 and the protrusion 26 implanted in the pentahouse housing 12 are connected to each other. A tension spring 28 is stretched between them. This tension spring 28 urges the leg lever 18 to rotate clockwise.

A guide plate 30 extending in the front-rear direction of the camera body is protruded from both sides of the upper rear of the storage chamber 16, and a guide hole (or groove) 32 is formed in this guide plate 30 and elongated in the front-rear direction of the camera. be. Corresponding to this guide groove 32, guide pins 3 that fit into this guide groove 32 are provided on both rear side surfaces of the lamp support body 14.
4 is installed protrudingly. This guide pin 34 is always fitted into the guide hole 32 and slides along the guide hole 32.
Therefore, since the tension spring 28 biases the leg lever 18 to rotate in the counterclockwise direction about the rotation support shaft 22, the lamp support 14 receives a lifting force and a forward force using the leg lever 18 as a lever. A biasing force acts.

A panel 12a is provided on the front surface of the storage chamber 16. The panel 12a cooperates with the lamp support 14 to seal the storage chamber 16 when the lamp support 14 is stored (FIG. 1).

Below the guide plate 30 of the storage chamber 16, a locking lever 38 is rotatably supported on a rotation support shaft 36 implanted in the pentahouse housing 12. At one end of this locking lever 38, the lamp support 14 is attached to the storage chamber 1.
A hook 40 is formed to engage with the pin 20 when housed in the pin 6, and a long hole 42 is formed at the other end.

Further, on the rear inner surface of the pentahouse housing 12, a connecting rod 46 is rotatably supported on a rotation support shaft 44 implanted in the pentahouse housing 12. A pin 48 that fits into the long hole 42 of the locking lever 38 is installed at one end of the connecting rod 46, and a long hole 50 is installed at the other end.
has been formed. The rotation support shaft 44 has a connecting rod 46.
A spring 52 is wound thereon to constantly urge the holder in the counterclockwise direction. Therefore, the spring 52 constantly biases the locking lever 38 via the connecting rod 46 in the clockwise direction, that is, in the direction in which the hook 40 engages with the pin 20.

A slider 54 that slides in the vertical direction is provided on the rear surface of the pentahouse housing 12. A pin 56 that fits into the elongated hole 50 of the connecting rod 46 is implanted inside the upper part of the slider 54, and an operating protrusion 58 that protrudes to the outside from a window provided in the pentahouse housing 12 is provided in the center. be.

The operation of this embodiment having the above configuration will be explained.

When the lamp support 14 is stored in the storage chamber 16, the hook 40 of the locking lever 38 engages with the pin 20 of the lamp support 14, and the lamp support 14 is moved by the biasing force of the tension spring 28. This prevents it from jumping out (see Figure 1).

When the photographer places his fingertip on the operation protrusion 58 and pushes it downward, the slider 54 and pin 56 are pushed down as one, and the connecting rod 46 rotates clockwise against the biasing force of the spring 52. When the connecting rod 46 rotates clockwise, the locking lever 3
8 rotates counterclockwise, hook 40 and pin 20
The leg lever 18 is rotated counterclockwise by the biasing force of the tension spring 28, and the lamp support 14 is ejected diagonally forward and upward from the storage chamber 16 (see FIG. 2).

When storing the lamp support 14, push the front surface of the lamp support 14 in the direction of the arrow, and the lamp support 14 will be stored in the state shown in FIG.

[Effects of the invention] As is clear from the above explanation, according to the raising mechanism of the built-in strobe of the present invention, the light emitting part housed in the pentaprism part can be raised remotely from the outside with a single touch. It is possible to take pictures while looking at the camera without losing the photographic stability. Moreover, this light emitting part does not simply rise, but rises forward, that is, while approaching the subject, so even if the height when rising is lowered, there is no vignetting of the strobe light caused by the lens barrel, and the light emitting part By getting closer to the subject, less light is needed, which reduces battery consumption.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of an embodiment of the present invention showing the strobe in the strobe storage state, and FIG. 2 is a longitudinal cross-sectional view of the same embodiment showing the strobe in the raised state. 10... Pentaprism, 12... Pentahouse housing, 14... Lamp support, 16... Storage chamber, 18... Leg lever, 20... Pin, 22...
Rotation support shaft, 24, 26... Engaging protrusion, 28... Tension spring, 30... Guide plate, 32... Guide groove, 34... Guide pin, 36... Rotation support shaft, 38
...Engagement lever, 40...Hook, 42...Elongated hole, 44...Rotation shaft, 46...Connecting rod, 48...
... Pin, 50 ... Long hole, 52 ... Spring, 5
4...Slider, 56...Pin, 58...Operation protrusion.

Claims (1)

[Claims for Utility Model Registration] (1) A storage chamber 16 provided above the front part of the pentaprism section is equipped with a light emitting section via an in/out mechanism, and this light emitting section is installed at a position stored in the storage chamber 16. The in/out mechanism for moving between the storage chamber 16 and the upper front position of the storage chamber 16 includes a guide plate 30 protruding from both sides of the rear upper part of the storage chamber 16 and
A guide pin 34 embedded in the rear side of the light emitting part is fitted into a guide groove 32 bored in the guide plate 30. , the tip of the leg lever 18 is rotatably attached to the middle of the side surface of the light emitting part via a pin 20, and a tension spring is provided which urges the leg lever 18 to rotate in a direction that constantly raises the light emitting part. 28 is attached to the built-in strobe light emitting unit in a single-lens reflex camera, further comprising a locking mechanism that can be operated with a single touch to lock the leg lever 18 when the light emitting unit is located in the storage chamber 16. entry/exit mechanism. (2) The locking mechanism is pivotably supported on the side wall of the storage chamber 16, and has a hook 40 at one end that engages with the pin 20 when the light emitting section is in the storage position. A lever 38, a slider 54 provided on the rear surface of the camera body so as to be slidable up and down, and a connecting rod pivotably supported on the inner surface of the pentagonal prism section and linking the slider 54 and the locking lever 38. 46 and the hook 4
0 engages with the pin 20, and a spring 52 attached to the connecting rod 46 so as to constantly bias the locking lever 38 in the direction in which the lock lever 38 engages with the pin 20. The in/out mechanism for the built-in strobe light emitting part in a Rex camera.