JPS5945969B2 - Fracture - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elevating device for a flash, and more particularly to an elevating device in which a built-in flash body is set by swinging between a storage position and a light emitting position.

Several cameras with a built-in flash unit, such as a strobe, have been proposed, but in order to prevent so-called red-eye by keeping the photographic optical axis and the strobe optical axis as far apart as possible, conventionally the camera was always placed in the retracted position. In addition, a flash elevating mechanism is used in which the light emitting part of the strobe, which has been stored and oriented, is raised (hopped up) to the light emitting position above the camera during flash photography.

However, this type of conventional flash lifting mechanism
Since the flash body supported on the front side of the camera is simply raised and lowered, in order to ensure a distance between the optical axes that is effective for preventing red-eye (70 to 75 points or more for normal cameras), it is necessary to To require a mechanism,
There is a risk that the entire camera will become larger, and since the light-emitting window on the front of the flash body is always exposed, it can get dirty or scratched, which can reduce the actual amount of light emitted by the strobe, making it difficult to get the correct amount of light. There was a problem that I couldn't get it.

The present invention has been made in view of the above-mentioned conventional problems.
The setting fulcrum of the flash body, which has a light emitting window on the front, is pivoted so that it can swing freely on the camera body side, so that the flash body can tilt its light emitting surface downward, centering on the fulcrum, to prevent scratches etc. when not in use. The camera can be moved to a storage position where it is stored in a storage recess on the camera side, or a light emitting position where it stands up with the light emitting window facing forward. The flash body is made to swing between a storage position and a light emitting position.

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

As shown in FIG. 1, a square box-shaped strobe case 2 having a light-emitting window 1 on the front is equipped with at least a xenon discharge tube and a reflector (not shown) inside, as well as a light-emission control circuit and necessary batteries. etc. are housed in the case 2, on the camera body side, or in a dispersed manner in both.

On the top surface of the camera body (indicated by the two-dot chain line in the figure), there is a storage recess 3 where the strobe case 2 can be stored from the light emitting window 1 side.
(not specifically shown), and fulcrum shafts 4, 4 implanted on both sides of the rear base of the strobe case 2 are swingably supported on the rear upper edge side of the storage recess 3.

That is, the strobe case 2 can be swung around the fulcrum shafts 4, 4 so that it can take either a storage position in which it is stored in the storage recess 3 with the light emitting window 1 looking down, or a light emitting position in which it stands up on the top of the camera body. It's starting to move.

On the other hand, a lifting lever 7 is attached to the camera body below the strobe case 2 and is guided by guide grooves 5, . . . and guide pins 6, . A rising portion 7a rising from the upper end of the lift lever 7 along the left side of the strobe case 2 has a horizontally elongated guide groove (long groove).
8 is bored, and a guide pin 9 implanted near the fulcrum shaft 4 on the left side surface of the strobe case 2 is slidably fitted into the guide groove 8 to allow the lift lever 7 to slide in the downward direction. At this time, the strobe case 2 is swung in the direction of the retracted position via the guide pin 9 about the fulcrum shafts 4, 4, while when the elevating lever 7 is slid in the upward direction, the strobe case 2 is
are linked to swing in the direction of the light emitting position.

In this way, if a support structure is adopted in which the strobe case 2 is swung between the retracted position and a light emitting position, and an elevating structure is adopted in which the strobe case 3 is swung via the guide pin 9 near the fulcrum shaft 4, the above-mentioned conventional As shown in Fig. 3, in the case of a type that moves vertically up and down, the stroke l
Since the strobe case 2 can be set between the light emitting position and the storage position with a short lifting stroke l' of the lifting lever 7, the strobe case 2 can be set to the emitting position and the storage position. can.

A blinding plate 10 is attached to the lower front side of the strobe case 2, with both ends pivotably supported on both side surfaces of the case 2.

When the strobe case 2 is in the light emitting position, the blind plate 10 is swung by a spring member (not shown) and positioned at a substantially right angle, and hides the opening of the storage recess 3 and hides the opening of the strobe case 2. When swinging in the direction of the storage position, it is abutted and stopped by a stopper member (not shown) from the rotating direction, and as shown in FIG. It is stored together with the strobe case 2. Next, the strobe case 2 is automatically swung from the storage position to the light emitting position in conjunction with the switching operation of the EEl flash switching ring 11 toward the flash setting position, and Rocking of the strobe case 2 in which the switching ring 11 can be automatically switched and rotated from the flash setting position to the EE setting position in conjunction with the push-down swing operation of the strobe case 2 in the direction of the storage position. mechanism is adopted.

That is, the switching ring 11 for EE photography and flash photography, which is coaxially and rotatably supported on the lens barrel 11a of the camera, has an A (auto) mark indicating EE photography and an A (auto) mark on the upper outer periphery as shown in FIG. , and the marks indicating flash photography are printed at regular intervals, and in order to match these marks A or this with the ▼ mark on the camera body side, turn knob 12.
The switching ring 11 can be switched and rotated in both directions by operating the switch.

A spring member (not shown) is hooked to the switching ring 11 to constantly urge the switching ring 11 toward the EE setting position.

A coil spring 14 is tensioned between the lower right edge of the lift lever 7 and a pin 13 installed on the upper side of the camera body, so that the strobe case 2 is always swung in the direction of the light emitting position. is affiliated with.

On the other hand, the inverted L-shaped first locking lever 15 has a pin 1 at the center.
The lower arm 15 is pivotably supported at the pin 18 of the camera body, and is biased counterclockwise around the hour hand by the force of a coil spring 17 hooked between the upper arm 15a and the camera body.
It is localized with b being applied and stopped. This lower arm 15
In this normal position, b is in a position where the projection piece 7b provided on the left side edge of the elevating lever 7 of the strobe case 2 in the retracted position can be locked against the spring force of the lever spring 14;
In addition, the cam surface 15c on the lower side edge of the upper arm portion 15a comes into contact with the interlocking pin 19 implanted in the switching ring 11, and the first
The entire locking lever 15 is in a position where it can swing obliquely against the force of the coil spring 17.

Next, the second locking lever 20 is coaxially supported with the first locking lever 15 and pivotably supported by the pin 16.
6, the engaging portion 20a is biased counterclockwise by the spring force of the wire spring 21 wound around the first locking lever 15.
The first locking lever 15 is held against the upper side edge of the locking lever 15 so as to be interlocked with the swinging movement of the first locking lever 15 around the hour hand. The tip of the second locking lever 20 is connected to the cam surface 1 of the first locking lever 15.
5c, the first locking lever 15 is swung around the hour hand by the interlocking pin 19, and the lower arm 15b releases the locking of the protrusion 7b of the lift lever 7. Immediately before this, the locking portion 20b is arranged to lock the interlocking pin 19 from the opposite side of the switching rotation direction, and then the lower arm portion 15b releases the locking of the protrusion 7b.

This unlocked lower arm portion 15b has a cam surface 15c.
The spring force of the coil spring 17 is used to return the protrusion 7b to the locking position and position the protrusion 7b.
When the strobe case 2 is manually swung from the light emitting position toward the retracted position, the protrusion 7b of the elevating lever 7 moves to the lower arm 15a.
The first locking lever 15 is brought into contact with the engaging portion 20a.
When the second locking lever 20 is swung around the hour hand through the
When the lock is released, the protrusion 7b is locked to the lower arm 15a.

In order to use the flash lifting device configured as described above, when switching from the EE shooting state shown in FIGS. When the ring 11 is switched and rotated counterclockwise against the biasing force in the direction of the A mark, the interlocking pin 18 engages the first locking lever 15.
The first locking lever 15 gradually comes into contact with the cam surface 15c of the first locking lever 15.
The entire body is swung diagonally against the force of the coil spring 17.

The interlocking pin 18 that is in the middle of swinging the first locking lever 15 is moved to the second locking lever 2 that protrudes from the cam surface 15c.
0, the lever 20 is slightly swung around the hour hand against the spring force of the wire spring 21,
When the locking portion 20b falls behind the interlocking pin 18, the pin 15 takes a position where it can be locked against the biasing force of the switching ring 11.

After the second locking lever 20 takes the locking position of the interlocking pin 18, the first locking lever 15
When the lifting lever 7 is released from the lock, the coil spring 1
Start sliding in the upward direction with spring force 4.

As the lift lever 7 rises, the rising portion 7a moves the strobe case 2 to the fulcrum shaft 4, via the guide groove 8 and the guide pin 9.
4 to stand up from the storage recess 3, and is positioned at a light emitting position where the light emitting window 1 faces forward.

The blinding plate 10 is swung by the spring force of the spring member and positioned at a position substantially perpendicular to the light emitting window 1, thereby blinding the opening of the storage recess 3. At this time, the switching ring 11 is locked to the second locking lever 20 via the interlocking pin 18, so the 'mark is ▼
Maintains the flash shooting state that matches the mark.

Further, the lower arm portion 15b of the first locking lever 15 is returned to the locking position of the protrusion 7a again by the spring force of the coil spring 17 due to its cam surface 15c. Next, when switching from this flash photography state to EE photography, when the strobe case 2 is manually swung from the light emitting position toward the retracted position, the guide pin 9 is moved through the standing portion 7a. When the elevator lever 7 is lowered against the force of the coil spring 14, the projection 7b of the elevator lever 7 comes into contact with the lower arm 15b of the first locking lever 15, and the lever 15 is moved slightly in the direction of the hour hand. When it is swung, the second locking lever 20 is also swung around the hour hand via the engaging portion 20c, thereby releasing the locking of the interlocking pin 18 that is locked by the locking portion 20b.

As a result, the switching ring 11 is rotated around the hour hand by the biasing force, and automatically switches from the ' mark to the A mark relative to the ▼ mark. By swinging the strobe case 2, the blindfold plate 1
0 is held in the storage recess 3 from the rotating direction and swings so as to be substantially parallel to and opposite to the light emitting window 1.

When the strobe case 2 is in the storage position stored in the storage recess 3, the protrusion 7b of the lift lever 7 is locked to the lower arm 15b of the first locking lever 15, and the strobe case 2 is
is held with the light emitting window 1 facing inward.

In this embodiment, the strobe case 2 is constructed to stand up on the upper side of the camera, but it may be made to stand up on the side of the camera as the case may be.

Furthermore, although the strobe case 2 is moved up and down in conjunction with the switching operation of the switching ring 11, the strobe case 2 is stored and held in the retracted position, and this locking is released by operating the pushbutton. The stored force may swing to the light emitting position. Further, the storage recess 3 does not necessarily have to be a recess, but it is sufficient that the light emitting window 1 of the strobe case 2 faces inward in the storage position, that is, can be covered by the camera body. . As is clear from the above description, the present invention is such that the flash body is swingably attached to the camera body, and when stored, the flash body is stored in the storage recess with the light emitting window facing down, and when the light is emitted, it is placed in the light emitting position. Since the windows are made to stand upright, there is less risk of dirt or scratches on the luminous windows, and since they are not exposed during the day, deterioration due to ultraviolet rays, etc. can be eliminated, and dimming of the luminous windows due to these factors can also be avoided. It can be eliminated.

Furthermore, since the flash body is eccentrically swung to move up and down, it is possible to increase the distance between the photographing optical axis and the flash optical axis, and it is possible to effectively prevent the red-eye effect. In addition, since the swinging point of the elevating member is set near the fulcrum axis of the flasher, it is possible to swing the flasher between the light emitting position and the retracted position with a slight elevating stroke of the elevating member. The entire mechanism can be simplified, and the camera as a whole does not have to be enlarged, so it can produce advantageous effects compared to the conventional hop-up type elevating device. Further, when the flat body is erected, the storage recess can be covered from the outside with a blind plate, so that the appearance can be improved and foreign substances such as dust can be prevented from entering.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a flash lifting device according to the present invention;
Figure 2 is the front view of Figure 1 when the strobe case is stored, and Figure 3 is the front view of Figure 1 when strobe case is stored.
The figure is a side view of FIG. 2. 1... Light emitting window, 2... Strobe case, 3... Storage recess, 4, 4... Fulcrum shaft, 7... Lifting Lever, 7a, 8, 9...
- Interlocking member, 10... Blindfold board.

Claims (1)

[Claims] 1. A hook-shaped flash body with a light-emitting window on the front surface, a recess for housing the flash body provided in the camera body, an elevating member that supports the flash body so that it can freely protrude from the housing recess, and a lid on both sides of the flash body. A fulcrum shaft protruding from the lower corner of the rear side and rotatably supported on the camera body side, and a sliding groove provided at the upper part of the elevating member slidably fit into the sliding groove. It consists of a guide pin that projects from the side of the flash body eccentrically with respect to the fulcrum axis, and is linked so that the flash body swings eccentrically about the fulcrum axis when the flash body is projected. When the flash body is stored in the storage recess with the light emitting window facing downward, it covers the light emitting window, and when the light emitting window is turned forward and stands in the light emitting position, it is located below the light emitting window and covers the storage recess. A flash lifting device characterized by comprising a blindfold plate that covers from above.