JPH03188431A - 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" Conventional strobe devices that change the irradiation angle according to the focal length of the photographic lens are of the type that changes the distance between the arc tube and reflector and the condensing lens, and the type that changes the aperture angle of the reflector. The type is known.

The former moves the arc tube closer to the condensing lens when wide.
During telephoto mode, the arc tube is moved away from the condensing lens. Therefore, even though the distance between the condenser lens and the arc tube becomes closer during wide-angle mode, it is necessary to secure a retreat space behind the arc tube for telephoto mode.
During telephoto mode, a gap is created between the opening edge of the reflector and the condensing lens, and the light rays incident on this portion do not exit from the condensing lens, resulting in a decrease in the amount of irradiated light.

The latter is a public book that does not require a rear evacuation space compared to the former, 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 form.

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-54-50324, the upper and lower reflectors rotate about the same rotation center (hinge), so the upper and lower reflectors are arranged in an efficient shape (elliptical). ) was difficult to design.

``Object of the Invention'' The present invention provides a variable illumination angle strobe device of a type that changes the angle of a reflector, which can control the angle of the reflector with a simpler mechanism and is easy to manufacture and assemble. Another object of the present invention is to provide a variable illumination angle strobe device that can perform more efficient and highly accurate illumination by increasing the degree of freedom in designing the shape of a movable reflector.

"Summary of the Invention" In order to achieve the above object, the present invention provides a strobe device including a movable reflector main body that reflects strobe light emitted by a strobe light emitting tube toward a subject, which is arranged to sandwich the light emitting tube, a pair of movable reflector bodies that each rotate within a predetermined range around independent rotation centers at the rear; a reflector opening/closing drive mechanism that drives the pair of movable reflector bodies to open and close; It is characterized by comprising an arc tube holding member that holds the center of rotation of the reflector body relative to the base body which is pivotally supported, and elastically urges the pair of movable reflector bodies to rotate in a certain direction. .

According to the above configuration, since the arc tube and the reflector main body are not moved back and forth, the rear space can be reduced.

In addition, since the arc tube holding member can fix the arc tube and rotate the reflector, the configuration is simple, the number of parts is small, and the assembly work is easy. Since no retreat space is required, the entire device can be constructed thinner, and there is less light loss, which increases the guide number especially during tele-irradiation.

The invention as set forth in claim 7 provides a pair of movable reflectors that rotate about independent rotation centers, each having a cross-sectional shape between a maximum irradiation angle (wide irradiation) and a minimum irradiation angle (tele irradiation). This variable irradiation angle strobe device is characterized by being formed into a shape that provides good irradiation efficiency or irradiation effect at a certain irradiation angle.

According to this configuration, a variable illumination angle strobe device that can perform efficient (and uniform) illumination in all illuminations from wide illumination to telephoto illumination can be obtained.

Furthermore, the invention according to claim 8 sets the rotational center of the pair of movable reflectors, each of which rotates around an independent rotational center, at an arbitrary irradiation angle between the maximum irradiation angle and the minimum irradiation angle. This variable illumination angle strobe device is characterized in that it is set at a position where ideal reflectors at each illumination angle overlap on average.

According to this configuration, if the movable reflector is formed into an ideal shape (ellipse) at a certain irradiation angle, uniform irradiation is possible at any irradiation angle.

Moreover, as described in claim 9, if the position of the rotation center is determined so that the pair of movable reflectors overlaps the ideal reflector at the maximum irradiation angle and the minimum irradiation angle, even at the irradiation angle between them, Since it inevitably overlaps with the ideal reflector at each irradiation angle, the shape of the reflector is almost ideal at any irradiation angle.

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

FIG. 1 is an exploded perspective view showing essential parts of an embodiment of a 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. Note that this base body 17 is fixed to a camera body (not shown). The arc tube 11 has a curved fixed reflector 19 in close contact with its back surface, and is further attached to the arc tube mounting arm portion 2 of the base 17 with a trigger plate 21 sandwiched between the back surface of the fixed reflector 19.
3. The arm portion 23 is fixed to a base portion 25 that projects upward from the front end of the base body 17, and extends outward (in the left-right direction in FIGS. 2 and 3).

The base portion 25 is further provided with a pair of shafts 27 that are parallel to the longitudinal direction of the arc tube 11, spaced apart from each other by a predetermined distance, and protrude outward from each other. Below the pair of shafts 27, a similar pair of shafts 28 are provided at substantially symmetrical positions in the vertical direction with the optical axis X of this strobe device in between.

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 33 extending in the longitudinal direction of the arc tube 11, and a pair of legs 35 extending rearward in parallel from both ends of the main body 33 and having U-shaped side surfaces. .35. A shaft hole 37 into which the pair of upper shafts 27 are respectively fitted is provided near the base of each leg portion 35 . One or both of the legs 35 is formed with a sliding surface 36 that comes into 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 hook can be hung. Furthermore, locking recesses 39 are provided on both sides of the tip of the main body portion 33 .

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. At the base of each leg 43, a shaft hole 45 into which the pair of lower shafts 28 are respectively fitted is provided, and at the tip of the leg 43 there is a hook 46 on which the arc tube holding member 71 is hooked. is formed, and between the shaft hole 45 and the hook portion 46 is an interlocking pin 4 that projects outward.
7 is provided. Locking recesses 49 are provided on both sides of the tip edge of the main body portion 41 .

A cam follower protrusion 50 is provided on the outer surface of the main body 41 at a position approximately in the middle of the front edge. Note that the pair of reflectors 13 and 15 and the reflector support 2
9.31 constitute a pair of movable reflector bodies.

The pair of reflectors 13.15 are formed so that the cross-sectional shape forms part of an ellipse. The curved shape of both reflectors 13 and 15 corresponds to the shortest focal length (wide end) of the camera lens to which this strobe device is attached.
The setting is such that the most uniform or most efficient irradiation can be achieved at a certain focal length between the maximum focal length and the maximum focal length (telephoto end).

The upper reflector 13 is provided with claw parts 51 that are folded upward and then folded back again on both sides of the tip edge, and claw parts 51 that are folded upward at a right angle and are opposed in parallel to each other on both edges near the rear part. A pair of upright pieces 53 and this pair of upright pieces 53
It has protrusions 55 protruding from each of the opposing surfaces. The claw portion 51 is fitted into the locking recess 39 of the upper reflector support 29, and the protrusion 55 of the upright piece 53 is inserted into the shaft hole 39.
It is fitted and fixed from the outside so as to sandwich them.

The lower reflector 15 is formed identically (or symmetrically) to the upper reflector 13, and has a pair of claws 57 on both sides of the tip edge, and protrusions 6 on opposing surfaces on both sides near the rear end.
1 is formed. This lower reflector 15 is attached to the lower reflector support 31.
The claw portion 57 is fitted into the engagement recess 49, and the protrusion 61 of the upright piece 59 is fitted and fixed into the shaft hole 45 so as to sandwich them from the outside. These reflector supports 29 and 31 are constantly urged to rotate in the open (wide irradiation) direction by an arc tube holding member 71 made of an elastic member such as rubber.

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

Both sides 73 of the arc tube holding member 71 are provided with U-shaped grooves 74 having bottoms that follow the outer shape of the arc tube 11, and the image tips of the side parts 73 forming the grooves 74 are connected by connecting portions 7E5, respectively. It is integrally connected to the tip of the other side portion 73.

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 36.46 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, and also holds the pair of reflector supports 29 and 31 in the wide irradiation direction (the tip (in the direction in which the opening opens).

In the illustrated embodiment, the arc tube holding member 71 is shown three-dimensionally, but it may also be a planar member. 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 to the pin 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 holding member 71, the pin 47, and the sliding surface 36. In addition, in FIG. 1A and FIG. 1B, 7
7 is a Fresnel lens.

Further, below the lower reflector support 31, a cam mechanism including a cam plate 81 and a drive mechanism 85 is provided as a reflector opening/closing drive mechanism for driving the pair of reflector supports 29, 31 to open and close. The cam plate 81 has a cam surface 82 that comes into sliding contact with the cam follower protrusion 50, and a sector gear portion 8.
3, and rotates around a shaft 84. The cam surface 82 is
It has a contour that corresponds to the zoom lens focal length (tele, wide) and macro mechanism. That is, W is the wide irradiation position, T is the tele irradiation position, and M is the macro irradiation position. A reduction gear train of a drive mechanism 85 meshes with this sector gear portion 83 .

In addition, the power source of the drive mechanism 85 may be a motor provided independently (or a motor of a power zoom mechanism, or an interlocking mechanism linked to the zooming operation. In the case of a single motor, the focal length information of the photographing lens An input means, 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 distance information, the motor is driven to a direction and position where corresponding information is obtained from the opening/closing position detection means.

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

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

In this state, the wide portion W of the cam surface 82 contacts the cam follower protrusion 50, and the pair of reflector supports 29.3
The opening end of No. 1 is the most open. When the cam plate 81 rotates from here in the direction of the telephoto end T, the cam surface 82 pushes up the cam follower protrusion 50 while slidingly contacting it. Therefore, the lower reflector support 31 rotates in the closing direction against the elastic biasing force of the side portion 73 of the arc tube holding member 71.

Further, as the lower reflector support 31 rotates, the interlocking pin 47 moves in the direction of pushing the sliding surface 36 of the upper reflector support 29, and the upper reflector support 29 is moved by the biasing force of the arc tube holding member 71. It is allowed to rotate in the closing direction against the resistance.

Therefore, the upper reflector support 29 is moved to the lower reflector support 3 by the biasing force of the side portion 73 of the arc tube holding member 71.
Rotates in the closing direction in conjunction with 1.

When the cam plate 81 rotates to the telephoto end T, the state shown in FIG. 1B is reached. Furthermore, when the cam plate 81 rotates in the wide end W direction from this state, the cam surface 82 moves in a direction away from the cam follower protrusion 50, so that the lower reflector support 31 is rotated by the rotation biasing force of the arc tube holding member 71. The cam follower protrusion 50 rotates in the direction in which it contacts the cam surface, that is, in the open direction.Then, the interlocking pin 47 contacts the sliding surface 36.
The upper reflector support 29 is rotated in the opening direction by the biasing force of the arc tube holding member 71. As a result of the above operations, the pair of reflectors 13 and 15 are rotated in conjunction with each other, and their aperture angles change in a predetermined relationship, thereby changing the irradiation angle.

When assembling this embodiment, first, the pair of reflectors 13 and 15 are attached to the corresponding reflector supports 29.
．． Attach to 31. Then, the holes 37.45 of these reflector supports 29.31 are connected to the shafts 27.2, respectively.
8 and attach it to the base body 17. Then, after placing the arc tube 11 in a predetermined position, hooking the connecting portion 75 of the arc tube holding member 71 onto the hook portion 38, 46, and hooking the U groove portion 74 onto the arc tube, the assembly of the main parts is completed. do.

The cam plate 81 and the drive device 85 may be attached to the camera body, or may be attached integrally with the board 17 and then attached to the camera body.

FIG. 4A, FIG. 4B, FIG. 5, and FIG. 6 show the main parts of a variable illumination angle strobe to which another embodiment of the arc tube holding member is applied, corresponding to FIGS. 1 to 3. , members having the same functions as those in the first embodiment are given the same reference numerals.

The arc tube holding member 91 includes a pair of side parts 93 provided with a hole 92 into which the arc tube 11 is fitted, a connecting part 94 connecting the pair of side parts 93, and an engaging part provided approximately in the center of the connecting part 94. An engaging piece 96 having a matching hole 95 is provided.

The upper reflector support 29 is the same as the first embodiment except that an engagement protrusion 32 is provided upwardly projecting from the rear edge of the main body 33 at approximately the center.

In the arc tube holding member 91, the holes 92 are fitted into both ends of the arc tube 11, the connecting part 94 is hooked to the hook part 46 with the side part 93 stretched, and the engaging piece 96 is hooked onto the hook part 46. Upper reflector support 29 in the stretched state
It is fitted into the engaging protrusion 32 of. Therefore, the arc tube holding member 91 biases and holds the arc tube 11 in the direction of pressing against the arm portion 23, rotates and biases the lower reflector support 31 in the direction of opening, and presses the arc tube 11 against the arm portion 23. The upper reflector support body 29 is urged to rotate in the direction of approaching the connecting portion 94, that is, in the direction of opening the upper reflector support body 29.

Next, regarding the illumination angle changing operation of this second embodiment, the fourth
This will be explained with reference to FIG. A and FIG. 4B. In the lower reflector support 31, the cam follower protrusion 50 is always pressed against the cam surface 82 by the biasing force of the side portion 93 of the arc tube holding member 91.
It is open to the position where it touches the. Furthermore, the upper reflector support 29 is opened until the sliding surface 36 of the leg 35 comes into contact with the interlocking pin 47 of the lower reflector support 31 due to the urging force of the connecting portion 94 and the engaging piece 96 of the arc tube holding member 91. ing. Therefore, in a state where the cam follower protrusion 50 is in contact with the wide end W of the cam surface 82, the pair of reflectors 13, 15 are in the most open wide illumination state (see FIG. 4A).

When the cam plate 81 rotates in the direction of the telephoto end T from this wide state, the cam surface 82 slides into contact with the cam follower protrusion 50 and pushes the cam follower protrusion 50 up, so that the lower reflector support 31 resists the biasing force of the arc tube holding member 91. and rotate in the closing direction.

Furthermore, as the lower reflector support 31 rotates,
The interlocking pin 47 slides on the sliding surface 36 and interlocks and rotates the upper reflector support 29 in the closing direction against the biasing force of the arc tube holding member 91. That is, the upper reflector 13 and the lower reflector 15 are rotated in conjunction with each other in the closing direction to narrow the irradiation angle. Then, when the cam plate 81 rotates to the telephoto end T, the irradiation angle becomes the narrowest telephoto irradiation state (see FIG. 4B).

The assembly of the second embodiment is as follows, similar to the first embodiment described above. First, a pair of reflectors 13
．． 15 and corresponding reflector supports 29 and 31, respectively.
Attach against. Then, the reflector supports 29.31 are attached to the base body 17 by fitting the holes 37.45 into the shafts 27.28, respectively. After placing the arc tube 11 in a predetermined position, the connecting portion 95 of the arc tube holding member 81 is hooked onto the hook portion 46, the hole 92 is hooked onto the arc tube 11, and the engagement hole 95 is connected to the engagement projection. 32, assembly of the main parts is completed.

As described above, according to the arc tube holding member 81 of the second embodiment,
A portion (side portion 93) that presses the arc tube 11 and a portion (engaging piece 96) that rotationally biases the reflector support 29.31 are dynamically independent. Therefore, by arbitrarily setting the shape, thickness, width, etc. of the side portions 93 and the engaging pieces 96, the force for pressing the luminous tube 1 can be strengthened, and at the same time, the opening direction of the reflector support 29, 31 can be increased. Its power is weak and can be set arbitrarily.

Further, according to the second embodiment, the arc tube 11 or the reflector 13.15 does not have to be moved back during telephoto irradiation, so the length in the front and back direction can be shortened and the device can be made compact.

Further, since the arc tube 11 is held against the base 17 by one arc tube holding member 71.91, and the upper reflector support 29 and the lower reflector support 31 are rotated in a predetermined direction, the parts The number of points is reduced, and the number of assembly steps is also reduced, making assembly work easier.

Furthermore, since the cam plate 81 is brought into sliding contact with the cam follower protrusion 50 provided at a position away from the center of rotation (shaft 28) of the reflector support 31, the positional accuracy of the reflector 13, 15 can be increased.

In the above embodiment, the arc tube holding member 71 is formed integrally, but it may be formed as a separate body on a pair of sides. In this case, each side portion is provided with a portion that fits into the arc tube 11 and a hook portion. Further, in this embodiment, the reflector supports 29 and 31 are biased in the opening direction, but they may be biased in the closing direction.

Next, the shape and configuration of the pair of reflectors will be explained based on FIGS. 7 and 8.

The reflectors 13W and 15W have the most preferable curvature for wide irradiation, and the reflectors 13T and 15
T is a reflector with the most preferable (ideal) curvature during tele-irradiation. The reflectors 13N and 15N have curvatures that are most suitable for a certain focal length between wide illumination and telephoto illumination. And upper reflector 1
3N is rotated about a point O3 that almost overlaps the reflector 13W in the wide-angle state and 13T in the telephoto state. Similarly, the lower reflector 15N is rotated about a point 02 so that it almost overlaps with the reflector 13T in the wide-angle state and with the reflector 15T in the telephoto state. In addition, point 0
1, O* is not necessarily on the optical axis X.

In this way, if the pair of reflectors 13N and 15N are rotated around the point 010□, they will approximate reflectors 13W and 15W during wide irradiation, and reflectors 13T and 15W during tele irradiation, so that A good irradiation effect can be obtained at any irradiation position during tele-irradiation.

Note that the shape of the pair of reflectors 13N and 15N is not an ideal shape at any irradiation angle (but may be an approximate shape).

In addition, in the embodiment shown in FIG. 7, the upper and lower reflectors are arranged along one continuous ellipse, and the arc tube 11 is arranged at the focal point of the ellipse in order to increase the irradiation efficiency. As shown, the arc tube 11 is arranged at a position offset by a distance a from the optical axis
They may be rotated about points OII and Oo, respectively. By offsetting in this way, the pair of reflectors 13
Even at positions where n and 15n are from telephoto illumination to wide illumination, vignetting in the amount of light due to the arc tube 11 itself is reduced, and a better illumination effect can be obtained.

The reflectors shown in FIGS. 1 to 6 are of the offset type shown in FIG. 8.

``Effects of the Invention'' As described above, the present invention changes the illumination angle by opening and closing a pair of movable reflectors each having an independent rotation center, so the space required in the front and back direction is small, the camera body can be made thinner, and the camera body can be made more compact. It is possible to aim for Furthermore, the variable illumination angle strobe device of the present invention has a simple structure, reduces assembly steps, and facilitates assembly because the arc tube and movable reflector are held and rotated in a fixed direction by the same elastic member. Become.

Further, in the variable illumination angle strobe device according to claim 7, the pair of movable reflectors are formed in a shape corresponding to a certain illumination angle between the maximum illumination angle and the minimum illumination angle. Efficient irradiation is possible over the entire irradiation range.

In the variable illumination angle strobe device according to claim 8, the center of rotation of the pair of movable reflectors is set so that the center of rotation of the pair of movable reflectors almost overlaps the reflector corresponding to the ideal wide illumination during wide illumination, and almost overlaps the ideal reflector for telescopic illumination during the telescopic illumination. Since they are set to overlap, efficient irradiation is possible over the entire range from wide irradiation to tele irradiation.

[Brief explanation of drawings]

1A, 1B, 2 and 3 show a first embodiment of the variable illumination angle strobe device of the present invention,
Figure 1A is a side view showing the main parts in the wide irradiation state, Figure 1B
The figure is a side view showing the main part in the telephoto irradiation state, Fig. 2 is a perspective view showing the appearance of the main part, Fig. 3 is a perspective view showing the main part exploded, Fig. 4A, Fig. 4B, Fig. 5 The figure and FIG. 6 show a second embodiment of the variable illumination angle strobe device of the present invention.
Figure 4A is a side view showing the main parts in the wide irradiation state, Figure 4B
The figure is a side view showing the main part in the tele irradiation state, Fig. 5 is a perspective view showing the external appearance of the main part, Fig. 6 is an exploded perspective view of the main part, and Figs. 7 and 8 are the irradiation state. FIG. 2 is a schematic side view for explaining an invention related to a reflector used in a variable angle strobe device. 11... Arc tube, 13... Upper reflector, 15.
...Lower reflector, 17...Base 17.23...
Arm part, 25... Base, 27.28... Axis, 29
... Upper reflector support, 31... Lower reflector support, 32... Engagement protrusion, 33... Main body, 3
5... Leg portion, 36... Sliding surface, 37... Shaft hole, 3
8... Hooking part, 39... Locking recess, 41...
Main body part, 43... Leg part, 45... Shaft hole, 46...
Hook part, 47... Interlocking pin, 50... Cam follower protrusion, 53... Upright piece, 57... Claw part, 61...
...Protrusion, 71...Earth tube holding member, 73...Side portion, 74...Groove portion, 75...Connecting portion, 91...Earth tube holding member, 92...Hole, 93...・Side part, 94・・
- Connecting portion, 95...Engagement hole, 96...Engagement piece.

Claims (10)

[Claims] (1) A strobe device equipped with a reflector body that reflects strobe light emitted by a strobe light emitting tube toward the subject, which are arranged across the light emitting tube, each pivoting around an independent rotation center at the rear. a pair of movable reflector bodies that rotate within a predetermined range; a reflector opening/closing drive mechanism that drives the pair of movable reflector bodies to open and close; and a base on which the rotation center of the pair of movable reflector bodies is pivotally supported to support the arc tube. A variable illumination angle strobe device comprising: an arc tube holding member that holds the movable reflector bodies against each other and elastically biases the pair of movable reflector bodies to rotate in a certain direction. (2) In claim 1, the movable reflector main body:
A pair of reflector supports each rotating around an independent rotation center, and a reflector attached to each of the pair of reflector supports, the pair of reflector supports being positioned vertically on the base body. What is claimed is: 1. A variable illumination angle strobe device, characterized in that the strobe device is rotatably supported via a shaft provided with a staggered position. (3) In claim 2, the pair of reflector supports are in sliding contact with a pin provided on one reflector support and the pin provided on the other reflector support to maintain the pair of reflector supports at a certain level. The arc tube holding member is comprised of an elastic member that elastically biases the pair of reflectors to rotate in a direction in which the pin and the sliding surface are always in contact with each other. A variable beam angle strobe device featuring: (4) In claim 3, a cam follower contact portion is formed on the one pair of reflector supports, and the reflector opening/closing drive mechanism is a cam mechanism including a cam that slides into contact with the cam follower contact portion; The variable illumination angle strobe device is characterized in that the arc tube holding member rotates and biases the one reflector support in a direction in which its cam follower contact portion constantly contacts the cam. (5) In any one of claims 2 to 4, the arc tube holding member includes a pair of grooves that fit near both ends of the arc tube, and two parts forming both sides of each of the pair of grooves. A variable illumination angle strobe device comprising: a connecting portion that connects each of the two portions to the corresponding other portion and is engaged with the pair of reflector supports. (6) In any one of claims 2 to 4, the arc tube holding member connects a pair of side parts provided with holes that fit near both ends of the arc tube, and connects the pair of side parts to the Irradiation characterized by comprising: a connecting portion that is engaged with one of the pair of reflector supports; and an engaging portion that is provided on the connecting portion and that is engaged with the other of the pair of reflector supports. Variable angle strobe device. (7) A strobe device equipped with a reflector that reflects strobe light emitted by a strobe light emitting tube toward the subject, which are arranged across the light emitting tube, each of which is positioned at a predetermined position around an independent rotation center at the rear. In a variable illumination angle strobe device equipped with a pair of movable reflectors that rotate within a range of A variable illumination angle strobe device, characterized in that it is formed to correspond to any illumination angle between. (8) A strobe device equipped with a reflector that reflects strobe light emitted by a strobe light emitting tube toward the subject, which are arranged across the light emitting tube, each of which is positioned at a predetermined position around an independent rotation center at the rear. In a variable illumination angle strobe device equipped with a pair of movable reflectors that rotate within a range of A variable illumination angle strobe device characterized in that the rotation centers of the pair of movable reflectors are determined so that the pair of movable reflectors overlap on average with the ideal shape reflector at the illumination angle. (9) According to claim 8, the center of rotation of the movable reflector is set at a position that substantially overlaps the ideal shape of the reflector at each of the maximum and minimum illumination angles. Variable strobe device. (10) In any one of claims 1, 7, and 8, the pair of movable reflectors has a cross-sectional shape that is a shape that provides good irradiation efficiency at a certain irradiation angle between a maximum irradiation angle and a minimum irradiation angle, or A variable illumination angle strobe device characterized in that it is formed into a similar shape.