JPH0434423A - Stroboscopic device - Google Patents

Abstract

PURPOSE:To shorten the movement distance of a reflecting umbrella holding member, etc., and to reduce the size of the whole shape of the device by varying the angle of lighting irradiation by shifting a reflecting umbrella in position about a Fresnel lens and a flash discharge tube in position about the reflecting umbrella associatively with each other. CONSTITUTION:When a motor 17 is driven to transmits its power to a gear 21 through a pinion gear 19, a driving shaft 20 is rotated. A spiral groove 22 which engages projections of the reflecting umbrella holding member 6 is formed in the driving shaft 20, and consequently the turning force of the motor 17 is transmitted to the reflecting umbrella holding member 6 through the spiral groove 22, etc. The reflecting umbrella holding member 6 is energized as shown by an arrow Da to move in the same direction. Consequently, the movement distance of the reflecting umbrella holding member, etc., can be shortened, the whole shape of the stroboscopic device is reducible in size, and light distribution characteristics in the right-left direction can be controlled sufficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a strobe device that can vary the angle of light emission, and in particular can vary the position of the reflector with respect to the Fresnel lens and the position of the flash discharge tube with respect to the reflector. There is something about strobe devices.

BACKGROUND OF THE INVENTION Various strobe devices that can vary the angle of light emission have been proposed or put into practical use.If we look at the principle of changing the angle of light emission in these devices, we can see Figures 4 (a), (b), and (c).
) are well known.

FIG. 4(a) shows a light emitting unit 3 consisting of a reflector 1 and a flash discharge tube 2 placed in front and back along the light emitting axis with respect to a fixed Fresnel lens 4, that is, as indicated by arrow A in the figure. Means for moving in the indicated direction is shown. (Japanese Unexamined Patent Application Publication No. 60-83921, etc.) ・The figure (b) shows that the Fresnel lens 4 is attached to the light emitting unit 3 which is fixed in the opposite direction to the above-mentioned means in the front and back direction along the light emitting axis (arrow B direction). (Japanese Unexamined Patent Publication No. 53-10424, etc.) Figure (C) shows the flash discharge tube 2 in the front and back direction along the light emitting axis (direction of arrow C) with respect to the fixed reflector 1 and Fresnel lens 4. It shows the means to move it. (Japanese Unexamined Patent Publication No. 55-129326, etc.) Although not shown, there is also a known method for moving a reflector in the front and back direction along the optical axis with respect to a fixed flash discharge tube or Fresnel lens. .

Problems to be Solved by the Invention As mentioned above, various means for changing the angle of light emitting light in strobe devices are known, and when necessary, the light emitting angle can be adjusted manually or automatically in conjunction with switching the angle of view of the photographing lens of the camera. A variable operation of the corner will be performed.

However, the light emitting irradiation angle variable means shown in FIGS. 4(a) and 4(b) requires movement of the light emitting unit 3 or Fresnel lens 4 in order to obtain the desired irradiation angle on the wide-angle side or the telephoto side. The distance becomes long, and therefore, when considered as a strobe device, the overall shape becomes large.

On the other hand, with the means shown in FIG.
Although it can be made shorter than the previous example, and the device shape can be made smaller,
It is not possible to sufficiently control the light distribution characteristics in the left and right direction, and there is still a problem in terms of effective use of light emission.

The present invention was made in consideration of the above-mentioned disadvantages.
It is an object of the present invention to provide a strobe device that can vary the light emission angle by interlockingly varying both the position of the reflector with respect to the Fresnel lens and the position of the flash discharge tube with respect to the reflector.

Means for Solving the Problems The strobe device of the present invention includes a Fresnel lens disposed in front of a light emitting part mold, a reflective umbrella, and
a reflective umbrella holding member attached to the light emitting part mold so as to be able to change its position with respect to the Fresnel lens; a movable long groove; a flash discharge tube holding member for holding the flash discharge tube; and the flash discharge tube holding member is interlocked with movement of the reflector holding member so that the flash discharge tube moves within the long groove. It is configured to include a discharge tube movement control mechanism for moving the discharge tube, and a drive mechanism for moving the reflector holding member within the light emitting part mold.

Operation Since the strobe device according to the present invention is configured as described above, when the position of the reflector with respect to the Fresnel lens is varied by the movement of the reflector holding member by the driving member, the flash discharge tube also changes in conjunction with this movement. I will have to move.

That is, in the strobe device according to the present invention, the light emission angle is varied by interlocking the position of the reflector relative to the Fresnel lens and the flash discharge tube position relative to the reflector. It is possible to shorten the moving distance of the reflector holding member, etc., which is necessary for changing the flash, and the overall shape of the strobe device can be made smaller.
This means that the light distribution characteristics in the left and right directions can be sufficiently controlled.

Embodiments Hereinafter, embodiments of the strobe device of the present invention will be described.

FIG. 1 is an exploded perspective view of essential parts of an embodiment of a strobe device according to the present invention, and the same reference numerals as in FIG. 4 indicate the same functional configurations.

As is clear from FIG. 1, the reflector 1 is provided with a pair of long grooves 5 on both side surfaces 1a and lb, into which the flash discharge tube 2 can be inserted and moved.

Further, the reflector 1 is held by being accommodated in the storage recess 6a of the reflector holding member 6.

The reflective umbrella holding member 6 has a pair of long grooves 7 similar to those of the previous reflective umbrella 1 on both side surfaces 6b and 6c, and has an insertion hole 8a in the lower surface 6d into which a sliding rod 16, which will be described later, is inserted. A pair of protrusions 8 are provided. That is, the reflector holding member 6 is attached to the light emitting part mold 15 via the pair of projections 8 and the sliding rod 16 so as to be movable in the direction of the arrow.

The lower surface 6d of the reflector holding member 6 is further provided with a protrusion 9 that engages with a drive shaft 20 (described later) and transmits the rotational driving force of the motor 17.

On the other hand, on the upper surface 6e is a flash discharge tube holding member 1, which will be described later.
A pair of stepped bosses 10 are provided with a control member 23 for controlling the movement of the flash discharge tube holding member 11, and both ends of the upper surface 6e are connected to side portions 1 of a flash discharge tube holding member 11, which will be described later.
The side surface portion 6b fits into the sliding groove 13 formed in the portions 1a and llb.

It is formed to protrude from 6c.

The flash discharge tube holding member 11 includes a holding hole 12 into which the flash discharge tube 2 is inserted and an upper surface 6e of the reflective umbrella holding member 6 described above.
The sliding groove 13 that fits with both ends is connected to both side surfaces 11a, l.
I am preparing for lb. Further, the upper surface 11c is provided with a cam pin 14 which is fitted into a revolving cam groove 24 of a control member 23 which will be described later.

The light emitting part mold 15 has a mounting hole 15a1 for fixing the sliding rod 16, a fixing hole 15b1 for fixing the motor 17 which is a drive source with a screw 18, and a pinion gear 19 provided on the rotating shaft of the motor 17 inside. an insertion hole 15c through which it is inserted, and a gear 21 that meshes with the pinion gear 19;
It has a mounting hole 15d for mounting the drive shaft 20 in which the spiral groove 22 is formed. Further, the side surface portion 15e has an inclined wall 15f into which an inclined groove 26 provided in a control member 23, which will be described later, is inserted.

The control member 23 is the upper surface 11c of the flash discharge tube holding member 11.
A cam groove 24 into which the cam pin 14 provided on the reflector holding member 6 is fitted, an insertion groove 25 into which the pair of stepped bosses 10 provided on the upper surface 6e of the reflector holding member 6 are fitted, and a light emitting part mold 1
It is provided with an inclined groove 26 which is fitted into the inclined wall 15f of No. 5, and is attached to the stepped boss 10 provided on the upper surface 6e of the reflective umbrella holding member 6 with a screw 27.

Hereinafter, regarding the operation of one embodiment of the strobe device according to the present invention having the above-described configuration, FIGS. 2 and 3 consisting of a top view (a) and a schematic side sectional view (, b) showing the operating state will be explained. Refer to and explain.

FIGS. 2(a) and 2(b) show a state in which the reflector holding member 6 is located on the motor 17 side, as is clear from the drawings.

It is also clear from the drawings that the positional relationship of the flash discharge tube holding member 11, control member 23, etc. with respect to the light emitting part mold 15 and the reflector holding member 6 is as follows.

That is, the control member 23 has an inclined groove 26 located at the left end of the inclined wall 15f of the light emitting part mold 15 in the drawing, and a screw 27 attached to the stepped boss 10 of the reflective umbrella holding member 6.
are located on the end 25a side of the insertion groove 25, and the cam pin 14 on the upper surface 11c of the flash discharge tube holding member 11 is located on the end 24a side of the cam groove 24, and the flash discharge tube 2 is held in the long groove. 5 and is positioned on the end 5a side of 5.

Now, when the motor 17 is driven in the above state and its rotational force is transmitted to the gear 21 via the pinion gear 19, the drive shaft 20 is rotated. A helical groove 22 is formed which is engaged with the protrusion 9 of the member 6. As a result, the rotational force of the motor 17 is transferred to the pinion gear 19 and the helical groove 22.
2 and the like to the reflector holding member 6.

Therefore, the reflective umbrella holding member 6 is biased in the direction determined by the relationship between the spiral groove 22 and the protrusion 9, and in this case, it is biased in the direction of the arrow Da force, and the reflective umbrella holding member 6 is biased in the same direction. will be forced to move to

Therefore, although not shown, the light emitting part mold 15
The positional relationship of the reflector 1 with respect to the Fresnel lens disposed in front of the lens, that is, on the right side in the drawing, is changed, and by changing this positional relationship, the light emission angle is of course changed.

At the same time, the control member 23 attached to the reflector holding member 6 via the screw 27 and the stepped boss 10 is also moved in the direction of the force indicated by the arrow Da in conjunction with the movement.

However, the movement of the control member 23 is limited to its inclined groove 2.
6 and the inclined wall 15f of the side surface portion 15e of the light emitting portion mold 15.
3 moves in the direction of the force indicated by the arrow Da and at the same time moves in the direction of the arrow E, so that the end 25b of the insertion groove 25 approaches the stepped boss 10.

Furthermore, by moving the control member 23 in the direction of the arrow E, the cam groove 24 is aligned with the upper surface 11 of the flash discharge tube holding member 11.
This will push the cam pin 14 provided at c. On the other hand, the flash discharge tube holding member 11 is provided so as to be movable relative to the reflecting umbrella holding member 6 due to the relationship between the sliding groove 13 and the end of the reflecting umbrella holding member 6.
Due to the above-described suppression, the flash discharge tube holding member 11 moves based on the relationship determined by the cam groove 24 and the cam pin 14.

Specifically, the movement of the flash discharge tube holding member 11 in conjunction with the movement of the control member 23 in the direction of the arrow E -5 appears to be a movement in which the cam bin 14 approaches the end 24b of the cam groove 24. In other words, the moving operation is in the direction of the arrow Da force, which is the same direction as the moving direction of the reflective umbrella holding member 6. On the other hand,
If the flash discharge tube 2 is considered as the center, the movement will be in the direction of the right end in the long groove 5 in the drawing.

Therefore, the positional relationship of the flash discharge tube 2 with respect to the reflector 1 is also varied in conjunction with the movement of the reflector holding member 6, and the light emission angle is also controlled by such variable operation.

That is, in the strobe device according to the present invention, the light emission angle can be varied by simultaneously varying the position of the reflector with respect to the Fresnel lens and the position of the flash discharge tube with respect to the reflector.

Now, as the reflector holding member 6 and the like continue to be moved by the rotation of the motor 17 as described above, and when the control member 23 reaches the right end of the inclined surface 26 in the drawing, it becomes as shown in FIG. 3(a).
, the state shown in (b) is obtained.

As is clear from the drawings, in this state, the positional relationship of the flash discharge tube holding member 11 and the control member 23 with respect to the light emitting part mold 15 etc. is as shown in FIGS. 2(a) and 2(b) described above. Everything is the opposite of what it was before.

That is, the control member 23 is positioned such that its inclined groove 26 is positioned at the right end of the inclined wall 15f of the light emitting part mold 15 in the drawing, and the cam groove 25 is positioned such that its end 25b side contacts the screw 27, so that the flash The cam pin 14 on the upper surface 11C of the discharge tube holding member 11 is connected to the end 24b of the cam groove 24.
The flash discharge tube 2 is positioned on the end 5b side of the long groove 5.

When the motor 17 is rotated in the opposite direction from the previous case in this state, the rotational force is transferred to the pinion gear 19 and the gear 2.
1. The signal is transmitted to the reflector holding member 6 via the drive shaft 20, the spiral groove 22, and the protrusion 9, and therefore the reflector holding member 6, the flash discharge tube holding member 11, and the control member 23 are in the opposite direction, that is, in the direction of arrow Db and Db, respectively.
It moves in the force direction F until the states shown in FIGS. 2(a) and 2(b) are obtained.

In other words, the illustrated embodiment of the strobe device according to the present invention can obtain the states shown in FIGS. 3(a) and 3(b) from the states shown in FIGS. 2(a) and (b). The light emission angle is controlled based on the positional relationships between the reflector 1 and the Fresnel lens, and between the reflector 1 and the flash discharge tube 2.

Effects of the Invention As described above, in the strobe device according to the present invention, the light emission angle can be varied by interlocking the position of the reflector with respect to the Fresnel lens and the position of the flash discharge tube with respect to the reflector. It is possible to shorten the moving distance of the reflector holding member, etc., which is necessary to change the light emission angle, and to reduce the overall size of the strobe device, as well as to be able to sufficiently control the light distribution characteristics in the left and right directions. have.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of essential parts showing an embodiment of a strobe device according to the present invention, FIGS. 2(a), (b), and 3(a).
), (b) are a top view (a), a schematic side sectional view (b), and FIG. 4 (a) showing the operating state of the embodiment shown in FIG. 1, respectively.
(b) and (C) show the principle of varying the irradiation angle of a conventionally known irradiation angle variable device;
It is a diagram showing an example disclosed in Publication No.-129326 and the like. DESCRIPTION OF SYMBOLS 1...Reflector, 2...Flash discharge tube, 5.7...Long groove, 6...Reflector holding member, 8...Protrusion part, 9...
-Protrusion, 10...Stepped boss, 11...Flash discharge tube holding member, 12...Holding hole, 13...Sliding groove, 14
...Cam pin, 15...Light-emitting part mold, 16...
・Sliding rod, 17...Motor, 18...Screw, 19.
... Pinion gear, 20... Drive shaft, 21... Gear, 22... Spiral groove, 23... Control member, 24...
Cam groove, 25... Insertion groove, 26... Inclined groove, 27 Name of Kawa Neji's agent Patent attorney Shigetaka Awano Haka 1 Figure

Claims (1)

[Claims] A Fresnel lens placed in front of the light emitting mold,
a reflective umbrella holding member attached to the light emitting part mold so as to hold the reflective umbrella and change its position with respect to the Fresnel lens; The discharge tube is inserted,
and a movable long groove, a flash discharge tube holding member for holding the flash discharge tube, and the flash discharge tube holding member is interlocked with movement of the reflector holding member so that the flash discharge tube moves within the long groove. a discharge tube movement control mechanism for moving the discharge tube;
A strobe device comprising: a drive mechanism for moving the reflector holding member within the light emitting mold; and controlling the positions of the reflector holding member and the flash discharge tube relative to the Fresnel lens in conjunction with each other.