JPH03220537A - Stroboscopic device with variable irradiation angle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a variable illumination angle strobe device that can change the illumination angle according to the focal length (angle of view) of a photographic lens or arbitrarily.

"Prior art and its problems" Strobe devices that change the irradiation angle according to the focal length of the photographic lens have conventionally been of the type that changes the distance between the arc tube and reflector and the front lens (Fresnel lens), and the aperture angle of the reflector. It is known that the type changes the

In the former case, the arc tube is moved closer to the condenser lens during wide irradiation (at the maximum irradiation angle), and moved away from the Fresnel lens during tele irradiation (at the minimum irradiation angle). Even though the distance between the Fresnel lens and the arc tube is sometimes close, it is necessary to secure a retreat space behind the arc tube for telephoto irradiation.

Furthermore, during telephoto irradiation, a gap is created between the aperture edge of the reflector and the Fresnel lens, and the light rays incident on this area do not exit from the Fresnel lens, resulting in a decrease in the amount of irradiated light.

The latter is thinner than the former because it does not require a rear evacuation space, as proposed in, for example, JP-A-54-50324, JP-A-62-218949, and JP-A-1-147530. It has the advantage of being able to be formed.

However, all of these basically change the size of the opening by deforming a reflector made of a flexible or elastic material, thereby changing the irradiation angle.

Therefore, the amount and direction of deformation of the reflector is difficult to control.
Furthermore, since the flexibility of flexible materials changes over time, it is difficult to achieve accuracy, making it impractical.

Furthermore, in the variable illumination angle strobe device described in JP-A No. 54-50324, the upper and lower reflectors rotate about the same center of rotation (hinge), so the upper and lower reflectors can be arranged in an efficient shape ( There was a problem in that it was difficult to design a shape close to an ellipse.

Further, one condition for eliminating uneven light distribution of irradiated light and increasing efficiency will be explained with reference to FIG. 5. In this figure, the ideal reflector for 112W wide irradiation, 112T
is the ideal reflector for telephoto irradiation.

Of the light emitted by the arc tube 111, the reflector 112
The light rays emitted from the edge parts 113W, 113T of W, 112T and the light rays reflected by the edge parts 113W, 113T pass through the edge part 1131!1. θ1w
, θ17, reflection angle θ, and 02□ are made to be close to each other as one of the above conditions.

The applicant has already applied for a strobe device of a type that changes the illumination angle by opening and closing the reflector, which is more efficient than a strobe device of the type that simply changes the relative distance between the reflector and the front lens (1999). December 1st
8th patent application).

However, in the case of the type that changes the illumination angle by opening and closing the reflector, the rotation center of the arc tube and reflector is constant and the length of the reflector does not change, so the above emission angle and reflection angle are (for example, tele position), but not at other opening/closing angles. Furthermore, on the telephoto side, the effective range of the Fresnel lens was narrow.

Object of the Invention J An object of the present invention is to provide a variable illumination angle strobe device that enables uniform and efficient illumination at any illumination angle.

"Summary of the Invention" To achieve the above object, the present invention provides a strobe device including a strobe light emitting tube, a front lens, and a reflector body that reflects strobe light emitted by the strobe light emitting tube toward the front lens. , a pair of movable reflector bodies that are arranged to sandwich the arc tube, each of which rotates within a predetermined range about an independent rotation center at the rear to change the irradiation angle;

A reflector opening/closing drive mechanism that drives the pair of movable reflector bodies to open and close, a moving mechanism that changes the relative distance in the optical axis direction between the pair of movable reflectors and the front lens, and the reflector opening/closing drive mechanism and the moving mechanism. It is characterized by providing an interlocking mechanism for interlocking.

According to the above configuration, as the pair of movable reflectors is opened and closed, the distance between the pair of movable reflectors and the front lens changes, and the effective range of the Fresnel lens remains constant at any irradiation angle. This also enables irradiation with less light loss.

Furthermore, in the invention described in claims 4 to 6, since the auxiliary reflector is provided between the front lens and the outside of the movable reflector, the angle and shape of this auxiliary reflector are adjusted to the opening of the ideal reflecting mirror in telephoto mode. If designed to approximate
The above emission angle and reflection angle are almost the same at least at the telephoto end and the wide end, and at any irradiation angle between the telephoto end and the wide end, there is little deviation from the aperture shape of the ideal reflector at that irradiation angle. . Further, since the auxiliary reflector is provided, there is no gap between the front lens and the movable reflector, allowing efficient irradiation.

“Embodiments of the invention” The present invention will be explained below based on illustrated embodiments.

FIG. 2 is an exploded perspective view showing essential parts of an embodiment of the variable illumination angle strobe device of the present invention.

In this strobe device, an arc tube 11 and a pair of upper and lower reflectors 13,15 are held on a base 17. This base body 17 is supported by the camera body 20.

The arc tube 11 has a curved fixed reflector 19 on its back surface.
is held in close contact with the arc tube mounting arm 22 of the base 17 with the trigger plate 21 sandwiched between the back surface of the fixed reflector 19. The arm portion 22 is fixed to a base portion 23 that projects upward from the front end of the base body 17, and extends outward (in the left-right direction in FIG. 2).

A pair of shafts 24 that extend parallel to the longitudinal direction of the arc tube 11 and protrude in opposite directions are provided on the side surfaces of the base 23 . Below the pair of shafts 24, a similar pair of shafts 25 are provided at substantially symmetrical positions with the pair of shafts 24 with the optical axis X of this strobe device in between.

Further, on the lower surface of the base body 17, a projecting piece 26 having a guide hole 26a is provided to protrude almost directly below the base portion 23. Furthermore, a cam follower bin 27 is installed on the lower surface of the base 17, and a pair of guide protrusions 28, each having a guide hole 28a, are installed at a predetermined interval in the optical axis direction.

The pair of reflectors 13, 15 are rotatably supported by the base 17 via an upper reflector support 29 and a lower reflector support 31, respectively. Each reflector support 29, 31 has a U-shaped front face.

The upper reflector support 29 includes a plate-shaped main body part 33 extending parallel to the arc tube 11, and a pair of legs 35. It is equipped with 35. A shaft hole 37 is provided near the base of each leg portion 35 to fit into the pair of upper shafts 24, respectively. One of the leg parts 35 is formed with a sliding surface 36 that makes sliding contact with an interlocking pin 47 of the lower reflector support 31, which will be described later.
A hook portion 38 is formed on which the arc tube holding member 71 is hung.

The lower reflector support 31 includes a main body 41 extending in the longitudinal direction of the arc tube 11, and a pair of legs extending parallel to the rear from both ends of the rear edge of the main body 41 and having U-shaped sides. 43. A shaft hole 45 is provided near the base of each leg portion 43 to fit the pair of lower shafts 25, and a hook portion 46 on which the arc tube holding member 71 is hooked is provided at the tip portion of the leg portion 43. is formed, and between the shaft hole 45 and the hook part 46 is an interlocking pin 4 that projects outward.
7 is provided. And on the outer surface of the main body part 41,
A cam follower protrusion 50 is provided approximately in the middle of the front edge.

The pair of reflector supports 29 and 31 can be formed identically, and in this embodiment, the upper reflector support 29 and the lower reflector 31 are made of the same material. Therefore, although not shown, a bottle protrudes from the other leg 35 of the upper reflector support 29, and the bottle of the leg 35 slides into sliding contact with the other leg 43 of the lower reflector support. A surface is formed.

The pair of reflectors 13 and 15 are formed so that the cross-sectional shape forms a part of a roughly elliptical shape.

The curved shape of this pair of reflectors 13 and 15 is
This strobe device can be irradiated most uniformly or most efficiently at a certain focal length (angle of view) between the shortest focal length (wide end) and longest focal length (tele end) of the photographing lens of the camera to which this strobe device is attached. The settings are as follows.

The upper reflector 13 has a pair of upright pieces 53 on both edges near the rear that are folded upward at a right angle and face each other in parallel.
and protrusions 55 provided on opposing surfaces of the pair of upright pieces 53, respectively. The upper reflector 13 is
The protrusion 55 of the upright piece 53 is fitted into the shaft hole 37 of the upper reflector support 29 so as to sandwich them from the outside, and the back surface is fixed to the main body 33 of the upper reflector support 29, for example, by adhesive.

The lower reflector 15 is formed identically (or symmetrically) to the upper reflector 13, and has a pair of upright pieces 61 on both sides near the rear end, each of which has a protrusion 59 formed on its opposing surface. The lower reflector 15 is fitted into the lower reflector support 31 so that the protrusion 59 of the upright piece 61 is inserted into the shaft hole 45 from the outside, and the back surface is attached to the main body 41 of the lower reflector support 31. For example, it is fixed with adhesive. and these reflector supports 29.
31 is constantly urged to rotate in the opening (wide irradiation) direction by an arc tube holding member 71 made of an elastic member such as rubber. Note that the arc tube holding member 17 is usually made of silicone rubber.

The arc tube holding member 71 has a rectangular front shape.

Both side parts 73 of the arc tube holding member 71 are provided with a U-shaped groove part 74 having a bottom that follows the outer shape of the arc tube 11, and both light ends of the side parts 73 forming this groove part 74 are connected to connecting parts 75, respectively. It is integrally connected to the tip of the other side portion 73 by.

This connecting portion 75 is connected to the reflector support 29.3, respectively.
The hook 1 is hooked onto the part 38, 46 with the side part 73 stretched against its elastic force. In other words, the arc tube holding member 71 supports the arc tube 11 and the reflector support 2.
The hook 9.31 is hooked to part 38.46 in a stretched state against an elastic force. Therefore, the arc tube holding member 71 presses and holds the arc tube 11 against the arm portion 23 by the elastic force of the side portion 73.

The pair of reflector supports 29 and 31 are each urged to rotate in the wide irradiation direction (the direction in which the opening at the tip opens).

In the illustrated embodiment, the arc tube holding member 71 is shown as having a three-dimensional structure, but it may have a planar structure. In other words, it may be in the shape of a so-called rubber band.

Further, when one of the pair of reflector supports 29.31 is prevented from rotating against the biasing force of the arc tube holding member 71, the other reflector support 29.31 also moves against the bottle 47 and the sliding surface 36. Rotation is prevented by contact with. In other words, the pair of reflector supports 29 and 30 are interlocked by the biasing force of the light emitting unit pressing member 71, the bottle 47, and the sliding surface 36.

On the outside of the tips of the pair of upper and lower reflectors 13.15,
It is covered with an auxiliary reflector 76.

The upper and lower reflective surfaces 76a of this auxiliary reflector 76 are formed in accordance with the curved surfaces of the pair of reflectors 13.15, and the left and right reflective surfaces 76b have a substantially ideal curved shape at a certain illumination angle (tele illumination angle). It is formed in a similar shape. A Fresnel lens 77 as a front lens is disposed in front of this auxiliary reflector 76, and these auxiliary reflector 76 and Fresnel lens 77 are connected to the camera body 2.
Fixed to 0.

Further, the shaft hole 26a of the projecting piece 26 has a shaft 81 of the cam plate 82.
is inserted rotatably. The cam plate 82 has a cam surface 82a that makes sliding contact with the cam follower protrusion 50, and a gear 83 is formed on the shaft 81 integrally with the cam plate 82. The cam surface 82a slides on the cam follower protrusion 50 and moves it, that is, the lower reflector support 31, in the downward direction against the biasing force of the arc tube holding member 71.

The gear 83 meshes with a gear 88a of a reduction gear train 88. Since the gear 83 moves in the optical axis direction as described later, the gear A1 is formed to have a length that does not disengage from the gear 88a within its movement range, and so that it slides smoothly in the thrust direction.

A guide rod 84 is inserted through the pair of guide holes 28a. The rear end of the guide rod 84 is attached to the camera body 20.
A compression spring 85 is inserted between the protruding piece 28 on the i side and the camera body 20. Therefore, the base 1
7 is supported movably in the optical axis direction by a guide rod 84, and is always moved forward (forced) by a compression spring 85.Although not shown, the base 17 is supported by the guide rod 84. The part on the opposite side is guided to the camera body 20 so as to be slidable in the optical axis direction.

Further, the cam cylinder 8G is attached to the tip of the guide rod 84 protruding from the front guide hole 28a so as to be rotatable relative to the guide rod 84 so as not to be pulled out. A cam surface 86 a is formed on the rear end surface of the cam cylinder 86 , and the cam surface 86 a abuts against the cam follower bin 27 due to the urging force of the compression spring 85 .

A gear 87 is formed in a negative shape at the tip of the cam cylinder 86, and this gear 87 meshes with a gear 88a of a reduction gear train 88. The reduction gear train 88 is driven by an independently provided motor, a motor of a power zoom mechanism, or an interlocking mechanism that interlocks zooming operations. In the case of a single motor, means for inputting focal length information of the photographic lens;
A detection means for detecting the open/close position (corresponding focal length information) of the reflector 13.15 and a control means for driving and controlling the motor to the open/close position according to the focal length information are provided.

Based on the focal length information, the control means drives the motor to a direction and position where corresponding information is obtained from the opening/closing position detectors F and 9.

Next, the illumination angle changing operation of the above embodiment will be explained.

FIG. 1A shows a wide irradiation state where the irradiation angle is the widest.

In this state, the wide irradiation end W of the cam surface 82a is in contact with the cam follower bin 50, and the open ends of the pair of reflector supports 29, 31 are the most open. Further, the wide irradiation end W, which is the most recessed part of the cam surface 86a, contacts the cam surface 10 and the wabbin 27, and the pair of reflectors 1
3.15 is in the most advanced position.

When the gear 88a rotates in the telephoto irradiation direction from this state,
The cam plate 82 and the cam cylinder 86 each rotate in the telephoto irradiation direction. When the cam plate 82 rotates in the Te1/irradiation end T direction, the cam surface 82a slides against the cam follower protrusion 50 and pushes it up.

Therefore, the lower reflector support 31 rotates in the closing direction against the elastic force of the side portion 73 of the arc tube holding member 71. Further, with the rotation of the lower reflector support 31, the interlocking bin 47 is moved to the upper reflector support 29.
The upper reflector support 29 is moved in the direction of pushing the sliding surface 3G of the arc tube to allow the upper reflector support 29 to rotate in the closing direction against the biasing force of the arc tube holding member 71. Therefore, the upper reflector support 29 is attached to the side portion 73 of the arc tube holding member 71 (=1
Due to the force, it rotates in the closing direction in conjunction with the lower reflector support 31.

On the other hand, when the cam cylinder 86 rotates in the telephoto irradiation direction, the cam surface 86a slides against the cam head 10 and the wabbin 27 and pushes it backward against the force of the compression spring 85.
The pair of reflectors 13 and 15 move rearward, and the effective length of the reflector 1/reflector combined with the auxiliary reflector 7G becomes longer. Therefore, at any irradiation angle, the effective range of the nons 77 can be made constant.

As described above, the pair of reflectors 13, 15 move rearward while closing due to the interlocking rotation of the cam plate 82 and the cam cylinder 8G. Due to this movement of the twisted pair of reflectors 13.15, the pair of reflectors 13.15 and the auxiliary reflector 7G constitute a reflector with a shape closer to the ideal according to the irradiation angle and whose effective range of the Fresnel lens is constant. .

When the cam plate 82 and the cam cylinder 86 rotate to the telephoto irradiation end T, t, the pair of reflectors 13, 15 are closed to the maximum,
When the telephoto irradiation state is the most backward (see FIG. 1B) and the gear 88a rotates toward the wide irradiation end from this telephotoirradiation state, the cam surface 82a and the cam surface 86a move toward the cam follower protrusion 50 and the cam follower pin 27, respectively. move away from. Therefore, the lower reflector support 31 is rotated by the rotation biasing force of the arc tube holding member 71.
the direction in which the cam follower protrusion 50 abuts the cam surface 82a;
In other words, it rotates in the opening direction. Then, the arc tube holding member 7
The interlocking pin 47 comes into sliding contact with the sliding surface 36 by the urging force of 1, and the upper reflector support 29 rotates in the opening direction.

On the other hand, the base body 17 moves in the direction in which the cam follower pin 27 comes into contact with the cam surface 86a, that is, toward the Fresnel lens 77 due to the biasing force of the compression spring 85, which causes the pair of reflectors 13.15 to interlock. As it rotates in the opening direction and approaches the Fresnel lens 77,
The pair of reflectors 13 and 15 become reflectors that approximate the ideal reflector shape at each irradiation angle.

As described above, according to the variable illumination angle strobe device of this embodiment, the pair of reflectors 13 and 15, each having its own rotation center, open and close in conjunction with each other to almost overlap with the ideal reflector according to the illumination angle, and also Since the pair of reflectors 13, 15 move back and forth together with the arc tube 11 in conjunction with the movement, the effective range of the Fresnel lens can be made constant at any irradiation angle.

3A, 3B, and 4 show another embodiment of the variable illumination angle strobe device according to the present invention. This embodiment is characterized in that instead of moving the movable reflector toward and away from the Fresnel lens, the Fresnel lens is moved toward and away from the movable reflector. 1st
Components having the same functions as those in the embodiment shown in FIGS. A, IB, and FIG.

The auxiliary reflector 91 is clamped by claws 92a protruding from the four corners of a Fresnel lens 92 serving as a front lens, and is integrally fixed to the Fresnel lens 92. The integrated auxiliary reflector 91 and Fresnel lens 92 are guided to the camera body 20 by a guide mechanism (not shown) so as to be freely movable in parallel in the optical axis direction.

A bin 92 is located approximately in the center of both side edges of the Fresnel lens 92.
b protrudes, and each of these bins 92b has a drive lever 9 disposed on the side of the Fresnel lens 92.
The elongated hole 93a formed in No. 3 fits therein.

The pair of drive levers 93 are fixed to both ends of the shaft 95 and rotate together. Both ends of the shaft 95 project outward from the pair of drive levers 93, and these projecting parts are rotatably supported by the camera body 20. Therefore, when the drive lever 93 rotates around the shaft 95, the rotational movement is converted into a linear movement of the auxiliary reflector 91 and the Fresnel lens 92 through the long hole 93a and the pin 92b, and the auxiliary reflector 91 and the Fresnel lens 92 move back and forth. move.

Further, a torsion spring 96 is attached to one of the protrusions 95a to bias the drive lever 93 to rotate in the left direction in the figure. One end of the torsion spring 96 is locked to the camera body 20, and the other end is locked to the drive lever 93.

Furthermore, a sliding surface 9 is provided at the lower end of one of the drive levers 93.
4 is formed. This sliding surface 94 comes into sliding contact with a cam surface 98 formed at the end of a cam cylinder 97 that rotates around an axis parallel to the optical axis.

A gear 99 is integrally provided on this cam cylinder 97, and this gear 99 meshes with a reduction gear train 100. The reduction gear train 100 is the reduction gear train 88 of the first embodiment.
It has the same structure and is driven by the same drive mechanism.

Further, the gear 99 includes an intermediate gear 10 that constitutes an interlocking mechanism.
Gears 103 are in mesh with each other via 1 and 102. A cam plate 104 is integrally provided on the gear 103, and a cam follower protrusion 50 of the lower reflector support plate 31 is in sliding contact with a cam surface 105 of the cam plate 104. In other words,
Due to the rotation of this cam plate 104, the lower reflector support 3
1 is rotationally driven, and the upper reflector support 29 rotates in conjunction with the rotation of the lower reflector support 31 of , and the pair of reflectors 13 and 15 open and close.

Next, regarding the illumination angle changing operation of the second embodiment, the third
This will be explained with reference to FIG. A and FIG. 3B. FIG. 3A shows a wide irradiation state. In this wide irradiation state, the wide end W of the cam surface 105 is aligned with the cam follower protrusion 5.
0, the reflector 13.15 is held at its widest illumination angle. Furthermore, the drive lever 93 is
The sliding surface 94 contacts the wide end W of the cam surface 98 to hold the auxiliary reflector 91 and Fresnel lens 92 at the most retracted wide irradiation position.

When the intermediate gears 101 and 102 rotate in the telephoto irradiation direction from the wide irradiation state, the cam cylinder 97 and the cam plate 104 each rotate in the telephoto irradiation direction.

When the cam plate 104 rotates in the telephoto irradiation direction, the lower reflector support 31 rotates in the telephoto irradiation direction by the rotation biasing force of the arc tube holding member 71, and the lower reflector support 31 rotates in the telephoto irradiation direction.
In conjunction with the rotation, the upper reflector support 29 rotates in the telephoto irradiation direction. This closing rotation of the reflectors 13, 15 narrows the illumination angle.

On the other hand, when the cam cylinder 97 rotates in the telephoto irradiation direction, the sliding surface 94 moves while slidingly contacting the cam surface 98 without separating from the cam surface 98 due to the rotation biasing force of the torsion spring 96. In other words, the drive lever 93 is in the telephoto irradiation direction (counterclockwise in the figure).
Rotate to. This rotation moves the elongated hole 93a forward and moves the bin 92b, ie, the auxiliary reflector 91 and Fresnel lens 92, away from the reflector 13.15. This auxiliary reflector 91 and Fresnel lens 9
2, the effective length of the reflector becomes longer and the irradiation angle narrows.

When the intermediate gears 101 and 102 rotate to the telephoto irradiation position, the telephoto irradiation state shown in FIG. 3B is achieved.

Conversely, when the intermediate gears 101 and 102 rotate in the wide irradiation direction, the reflector supports 29 and 31 rotate in the wide direction (opening direction), and the drive lever 93 further rotates in the wide direction, causing the auxiliary reflector 91 and The Fresnel lens 92 moves in the wide direction (rearward), widening the irradiation angle and shortening the effective length of the reflector.

Opening and closing of reflector 13 and 15 above and auxiliary reflector 9
1 and the Fresnel lens 92 move back and forth, the irradiation angle changes almost ideally from wide irradiation to tele irradiation.

As described above, in this embodiment, a pair of upper and lower reflectors 13.
15 and open and close these reflectors 13.
15, the Fresnel lens 77.92, and the auxiliary reflector 76.91, the ideal reflector shape and length can be obtained at any irradiation angle. This enables uniform irradiation at any irradiation angle.

Furthermore, since the auxiliary reflector 76.91 is arranged between the Fresnel lens 77 (92) and the pair of reflectors 13.15, there is no gap between the pair of reflectors and the Fresnel lens even during tele-irradiation, making it easier to use. efficient,
Enables even irradiation.

Also, since the distance between the pair of reflectors 13 and 15 and the Fresnel lens is changed while opening and closing, compared to a type that simply changes the distance between the reflector and the Fresnel lens,
The travel distance is short. Therefore, the rear space can be reduced, and the camera body 20 can be made thinner.

In the illustrated embodiment, auxiliary reflectors 76.91 are provided, but
Even if these are not provided, by opening and closing the pair of reflectors 13.15 and changing the relative distance between these reflectors 13.15 and the Fresnel lens 77.92, the configuration is more ideal than simply opening and closing the reflectors. A reflector with a similar shape can be obtained.

"Effects of the Invention" As described above, the variable illumination angle strobe device of the present invention changes the relative distance between the pair of movable reflectors and the front lens in conjunction with the opening and closing of the pair of movable reflectors each having independent rotation centers. Since the irradiation angle is changed by changing the irradiation angle, the emission angle and reflection angle are almost equal at any irradiation angle, and the effective range of the front lens is constant, allowing for even and efficient irradiation. The front and rear lengths can be shorter than those that change the illumination angle by changing only the distance between the front lens and the front lens.

[Brief explanation of drawings]

1A, 1B, and 2 show a first embodiment of the variable illumination angle strobe device of the present invention.
The figure is a side view showing the main parts in the wide illumination state, Fig. 1B is a side view showing the main parts in the tele-illumination state, Fig. 2 is an exploded perspective view of the main parts, Fig. 3A, Fig. 3B, and FIG. 4 shows a second embodiment of the variable illumination angle strobe device of the present invention, and FIG. 3A is a side view showing the main parts in a wide illumination state.
Fig. 3B is a side view showing the main parts in the tele-irradiation state, Fig. 4 is a perspective view showing the main parts exploded, and Fig. 5 is a diagram for explaining the ideal length and shape of the reflector. . 11... Arc tube, 13... Upper reflector, 15.
... Lower reflector, 17 ... Base, 22 ... Arm part, 23 ... Base, 24. 25 ... Axis, 27 ...
- Cam follower bin, 29... Upper reflector support, 31... Lower reflector support, 33... Main body, 35... Leg, 36... Sliding surface, 37... Shaft hole , 38...Catch is part, 41... Main body part, 43...
・Legs, 45...Shaft hole, 46...Hook part, 47
...Interlocking bottle, 50...Cam follower protrusion, 71.
... Arc tube holding member, 73 ... Side part, 74 ... Groove part, 75 ... Connection part, 91 ... Auxiliary reflector, 92
... Fresnel lens, 93... Drive lever, 94.
...Cam surface, 97...Cam tube, 101°102...
Interlocking gear, 104...cam plate. Figure 1A Figure 1B Figure 3A Figure 3B

Claims (6)

[Claims] (1) A strobe device comprising a strobe light emitting tube, a front lens, and a reflector body that reflects the strobe light emitted by the strobe light emitting tube toward the front lens, the strobe device being disposed across the light emitting tube, a pair of movable reflector bodies, each of which rotates within a predetermined range around an independent rotation center at the rear to change the illumination angle; a reflector opening/closing drive mechanism that drives the pair of movable reflector bodies to open and close; A variable illumination angle strobe device comprising: a moving mechanism that changes the relative distance in the optical axis direction between a reflector and the front lens; and an interlocking mechanism that links the reflector opening/closing drive mechanism and the moving mechanism. (2) The variable illumination angle strobe according to claim 1, wherein the pair of movable reflectors are formed in a shape that substantially matches an ideal reflector at any illumination angle within the variable illumination angle range. Device. (3) The variable illumination angle strobe device according to claim 1 or 2, wherein the moving mechanism moves the movable reflector, the arc tube, and the reflector opening/closing drive mechanism toward and away from the front lens. (4) The variable illumination angle strobe device according to claim 3, further comprising an auxiliary reflector disposed between the front lens and the outside of the pair of movable reflectors. (5) The variable illumination angle strobe device according to claim 1 or 2, wherein the moving mechanism moves the front lens towards and away from the movable reflector. (6) The variable illumination angle strobe device according to claim 5, wherein an auxiliary reflector located outside the movable reflector is fixed to the front lens.