JP2557912Y2 - Strobe device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a strobe device,
More specifically, the present invention relates to a structure of a light-emitting unit in which light distribution of strobe light is improved.

[0002]

2. Description of the Related Art The present applicant has provided a film unit with a lens "Sharprun Panoramic Hi" (trade name) so that a user can easily take a picture even when he is not carrying a camera. This film unit with a lens uses a wide-angle photographing lens having a focal length of about 25 mm, and exposes the film through a 12 × 36 mm horizontally long aperture. When printing is performed, printing is performed at twice the enlargement ratio of a normal service print, and a horizontally long panoramic print is created. Such a panoramic film unit with a lens is intended to be used outdoors in a bright environment, so it is difficult to perform shooting with an appropriate exposure, for example, for indoor shooting. What is provided is desired.

[0003] By the way, such a panoramic film unit with a lens is required to be as low as possible in cost, so that a strobe device used for this is also required to be of a low cost type, for example, provided by the present applicant. Film unit with lens
It is preferable to incorporate a simple strobe device such as used in "flash" or the like. In this film unit with a lens, the focal length of the photographing lens is about 35 mm, and the screen size is exposed at a normal 24 × 36 mm. Therefore, the photographing range determined in advance by the focal length of the photographing lens and the screen size Has a horizontal angle of view of about 53
°, the vertical angle of view is in the range indicated by about 37 °,
The irradiation range of the built-in flash device is also set to a range that allows the above-described photographing range.

[0004]

However, the shooting range of the film unit with a panoramic lens described above has a horizontal angle of view of 75 ° and a vertical angle of view depending on the focal length of the shooting lens and the screen size. The angle of view is in the range indicated by 24 °. If the conventional strobe device described above is incorporated as it is, the horizontal irradiation angle of the strobe device is obviously not allowed for the horizontal angle of view of the shooting range. There is a drawback that both sides of the screen size are underexposed even when shooting. In addition, since the vertical illumination angle of the above-described strobe device is much larger than the vertical angle of view indicating the imaging range, the strobe device irradiates an area other than the imaging range of the film unit with the panoramic type lens, and illuminates the illumination range. However, there was a drawback that was reduced.

The present invention has been made to solve the above-mentioned drawbacks of the prior art. For example, a strobe having an irradiation angle which can reliably accept a photographing range, such as a film unit with a lens having a wide angle of view in the right and left directions. The purpose is to provide the device at low cost.

[0006]

According to the present invention, in order to achieve the above object, a single plate member cut out so as to place a seam at a portion avoiding a reflection surface which widens a horizontal irradiation angle is provided. A reflector plate is formed by bending, a horizontal irradiation angle is widened by the reflection surface of the reflector, and a vertical irradiation angle is regulated by a diffusion plate.

[0007]

FIG. 2 shows the appearance of a lens-fitted film unit using the present invention. The lens-fitted film unit is used by covering a unit body 10 with a paper box 11. The paper box 11 includes a lens hood 12, a release button 13, a winding knob 14, and a film counter display window 1.
In addition to the holes 5, holes for exposing the finder opening 16, the light emitting unit 17, and the finger clamps 18 and 19 are provided, and the photographing operation can be performed through these holes. In addition,
This film unit with a lens has an aperture size of 12 × 36 m for creating a panoramic photo, compared to a full size 24 × 36 mm of a normal 35 mm film.
m, and the aperture is horizontally long, and since the focal length of the taking lens 41 is 25 mm as described later in detail, the angle of view in the horizontal direction is 75 °, and the angle of view in the vertical direction is 24 °. The shooting range.

The unit main body 10 includes a main body 20, a front cover 21, and a rear cover 22. As shown in FIG. 3, the main body 12 is provided with a film roll chamber 25 and a patrone chamber 24 so as to sandwich an exposure frame formed on the back side thereof. The film drawn from the patrone is stored in a roll in the film roll chamber 25, and a winding knob 14 is provided on the patrone chamber 24.
The film is stored from the film roll chamber 25 into the patrone chamber 24 by rotating the winding knob 14 counterclockwise.

The main body 20 has a sprocket, a kick lever 32, and a counter disk 23, which are partially exposed on the rear surface and engage with the perforations of the film 18.
Is incorporated. When the film is wound up by one frame by rotating the winding knob 14 in the counterclockwise direction, the sprocket is rotated once by the rotation, the counter disk 23 is fed by one scale, and the shutter is charged. Hoisting knob 14
Is locked. Then, when the shutter button 13 is pressed, the tip of the kick lever 32 instantaneously moves rightward in the figure to perform photographing.

On the right side of the front of the main body 20, a strobe board 4 is provided.
0 is placed. A light emitting section 43 is mounted on the front upper portion of the flash substrate 40, a charging switch 45 is provided on the intermediate portion, a battery 47 is provided on the lower portion, and a flash circuit 48 including a main capacitor 44 is provided on the rear surface. The light emitting unit 43 is shown in FIG.
As shown in FIG. 2A, a discharge tube 61 and a reflector 60 are provided, and a diffusion plate 49 is disposed in front of these. As shown in FIG. 4, the reflector 60 is formed by integrally stamping the brilliant aluminum, and forming a left and right reflecting surface 60a, 60b for widening the irradiation angle in the horizontal direction by making a right angle bend from the broken line indicated by the two-dot chain line. And these sides 60f, 60
When curved surface bending is performed between the dotted lines shown in FIG. 5 so that g coincides with sides 60h and 60i of the lower reflecting surface 60c, as shown in FIG.
Left, right, and back reflection surfaces 60d, 60c, 60a, 60
b, 60e are formed. The diffusion plate 49 is shown in FIG.
As shown in (A), a fine groove is formed along the horizontal direction on the back surface of the plastic plate, and the Fresnel lens is designed so as to narrow the irradiation angle in the vertical direction.

An opening 27 for exposure is provided at the center of the main body 20.
The contact pieces 46a and 46b connected to the flash circuit 48 are disposed above the opening 27. These contact pieces 46a and 46b are formed of conductive thin strips and are parallel to each other at a certain interval. The contact piece 46a is located on a movement path of a drive lever 33 described later. One of the contact pieces 46a and 46b has a shorter length than the other contact piece 46a.

A lens holder 28 is fitted into the opening 27. The lens holder 28 includes the second lens 2
9, spacing ring 30, shutter blade 31, shutter cover 3
5, the first lens 37 and the retaining ring 3
These are integrated by fitting the lens 9 over the lens holder 28.

In the center of the spacing ring 30, a stop aperture 30a for determining the aperture diameter of the taking lens 41 is formed, and a step 30b is formed so as to surround the aperture. The step 33 is provided with a notch, through which the shutter blade 31 can enter and exit to open and close the aperture 30a. The shutter blade 31 has a substantially V shape, one end of which is pivotally mounted on a pin 51 protruding from the front surface of the main body 20, and an opening / closing plate 31a for opening and closing the aperture 30a at the other end.
Are integrally formed.

The opening and closing of the shutter blades 31 is performed by a driving lever 33.
Done by The drive lever 33 is pivotally mounted on a pin 57 implanted on the front surface of the main body 12, and is urged counterclockwise by a spring 34. One end 33 of drive lever 33
At a, a pin 33b is implanted at the other end so as to protrude into the movement path of the kicking lever 32. Further, the drive lever 33 has a pressing portion 33c integrally provided on the right side of one end 33a of the drive lever 33. The pin 33b is engaged with a slot 31b formed in a bent portion that forms the shutter blade 31 in a V-shape, and the drive lever 33 is connected to a root portion of the shutter blade 31, that is, a portion from the shaft 51 to the V-shaped bent portion. Overlap. When one end 33a of the drive lever 33 is kicked off in the process of instantaneously moving the kicking lever 32 rightward, the driving lever 33 swings clockwise against the spring 34 and then biases the spring 34 again. To return to the original position.

As described above, when the drive lever 33 makes one reciprocating swing, the shutter blade 31 swings one reciprocating motion about the shaft 51 through the engagement between the pin 33b and the slot 31b, and the open / close plate 31a. The exposure is performed once by opening and closing the aperture 30a. Further, the shutter blade 31 is
When a is released, the pressing portion 33c presses the contact piece 46a, and the contact piece 46a contacts the contact piece 46b. When the shutter blade 31 closes the aperture 30a, the pressing portion c
Retreats upward from the contact piece 46.

A front cover 21 that covers the front surface of the main body 20 has a lens hood 12 provided with an opening for exposing the photographing lens 41, a finder opening 16, a finger catch 18,
19 and the like are provided integrally. The finger clasp 19 is partially cut away, and can be pressed in the front-rear direction by its own elasticity. This cut-out portion serves as a strobe switch 19a.
On the back side of 9a, there is provided a short-circuit plate 52 which contacts the charge switch 45 and short-circuits them.

The operation of the above configuration will be briefly described. When the strobe switch 19a is pressed, the short-circuit plate 52
Short-circuits the charging switches 45a and 45b. Thus, the main capacitor 44 and the trigger capacitor included in the strobe circuit 48 are charged by the current supplied from the battery 47.

Further, when the shutter button 13 is pressed while pressing the strobe switch 19a, the shutter drive mechanism 26 is released, and the kick lever 32 instantaneously moves from the cocking position shown in FIG. 3 to the right. In the course of this movement, the tip of the kick lever 32 kicks one end 33 a of the drive lever 33 and swings the drive lever 33 clockwise against the spring 34. The swing of the drive lever 33 is transmitted to the shutter blade 31 via the pin 33b and the slot 31b, and the opening / closing plate 31a opens the aperture 30a. At the same time when the aperture opening 30a is fully opened, the pressing portion 33c of the drive lever 33 presses the contact piece 46a from above, and bends the contact piece 46a, thereby bending the contact piece 46a.
Contacts the tip of the contact piece 46b.

At this moment, the trigger circuit in the flash circuit 48 is short-circuited, and the electric charge stored in the trigger capacitor is discharged. When the trigger circuit is short-circuited in this way, a trigger signal for light emission is given to the discharge tube in the light emitting section 43, and the discharge tube is discharged by the electric charge stored in the main capacitor 44, and strobe light emission is performed.

The strobe light is illuminated on the subject through a diffusion plate 49. The illumination angle of the illumination light in the vertical direction is narrowed by the diffusion plate 49 as shown in FIG. The irradiation angles in the directions are widened by the left and right reflecting surfaces 60a and 60b as shown in FIG. The irradiation range indicated by such horizontal and vertical irradiation angles can reliably allow a shooting range defined by the focal length of the shooting lens 41 and the size of the aperture. The sides 60h and 60i and the sides 60f and 60g
And the reflection surface 60 for widening the irradiation angle in the horizontal direction.
Since it is bent so as to be located at a position avoiding a and 60b, the amount of light can be increased with respect to irradiation in the horizontal direction. Note that, as shown in FIG.
The opening angle θ of 0b is preferably about 70 to 80 °.

The above description has been made of an example in which the present invention is applied to a film unit with a lens for panoramic photography. However, the present invention is not limited to a film unit with a lens.
The present invention can also be applied to low-cost cameras and the like.

[0022]

[Effect of the Invention] As described above, according to the strobe device of the present invention, the irradiation angle in the horizontal direction is increased by the reflector,
Since the irradiation angle in the vertical direction is regulated by the diffusion plate, the irradiation angle in the vertical or horizontal direction can be freely changed according to the photographing range of the film unit by incorporating the film unit in a panoramic type film unit with a lens, for example. In addition, the reflector is bent and molded so that the seam is located at the part that avoids the reflective surface that widens the horizontal irradiation angle, so the reflectivity is improved by that much and the illuminance in the horizontal direction is improved. Can be achieved.

[Brief description of the drawings]

FIGS. 1A and 1B show a light emitting portion of a strobe device according to the present invention. FIG. 1A is a longitudinal sectional view and FIG. 1B is a transverse sectional view.

FIG. 2 is a perspective view showing the appearance of a film unit with a lens using a strobe device.

FIG. 3 is an exploded perspective view of a main part showing a film unit with a lens.

FIG. 4 is a development view showing a reflector arranged in the light emitting unit.

FIG. 5 is a perspective view showing a reflector arranged in the light emitting unit.

[Explanation of symbols]

 13 Shutter Button 14 Winding Knob 19a Strobe Switch 30a Aperture Opening 31 Shutter Blade 32 Kicking Lever 42 Strobe Board 49 Diffusion Plate 60 Reflector

Claims (1)

(57) [Scope of request for utility model registration] 1. A strobe device for irradiating light from a discharge tube to a subject side through a reflector and a diffusion plate, wherein the reflector has a front surface opened and is behind the discharge tube.
A reflective surface that is bent to surround the
Upper and lower reflective surfaces connected above and below the launch surface,
Left connected to either side of either of the launch surfaces
Single plate die-cut in an expanded shape consisting of
Bend the member along the crease between these surfaces
And part of the outer contour of the left and right reflective surfaces is reflected upward or downward
Outside the upper or lower reflective surface at a position opposite to the crease between
It is designed to fit a part of the shape contour, and it extends to the left along the bent line
The right and left reflective surfaces are bent at right angles to make the left and right reflective surfaces
Restricts the horizontal irradiation angle to the irradiation angle corresponding to the shooting angle of view
And the diffuser plate separates the upper and lower reflecting surfaces and the discharge tube.
Illumination angle corresponding to shooting angle of view
Strobe device characterized by the following restrictions: