JPH04119437U - strobe device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a low-cost type strobe device with an illumination angle that covers the shooting range of a panoramic type camera. [Structure] The light emitting section of the strobe device includes a discharge tube 61, a reflector 60, and a diffuser plate 49.
The reflector 60 is integrally formed by bending die-cut bright aluminum, and is formed so that the seam is located at a position that avoids the left and right reflective surfaces 60a and 60b, and has the effect of widening the horizontal beam angle. . Further, the diffuser plate 49 has fine grooves formed along the horizontal direction on the back side, and has the function of regulating the irradiation angle in the vertical direction.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a strobe device, and more specifically, the present invention improves the light distribution of strobe light. This relates to the structure of the light emitting section.

0002

[Conventional technology]

Now you can easily enjoy taking photos even when you don't have a camera with you , a film unit with a lens from the applicant "Utsurun desu Panoramic Hi" (Product name) is provided. This lens-equipped film unit has a focal length of A wide-angle photographic lens of about 25 mm is used, and a horizontally long aperture of 12 x 36 mm is used. The film is exposed through a . Then, when printing, the normal service Print at twice the magnification rate of a sprint to create a horizontally long panoramic print. be done. This kind of panoramic type lens-equipped film unit is suitable for use in bright rooms. Since it is intended to be used outdoors, for example, when shooting indoors, it is necessary to use the appropriate exposure. It is difficult to take pictures with It is.

0003 By the way, it is possible to use such a panoramic type film unit with a lens. Since it is necessary to keep the cost as low as possible, the strobe device used for this is also low cost. For example, the lens-attached film provided by the applicant A simple strobe like the one used in the unit “Utsurun Desu Flash” etc. Preferably, the device is built-in. This lens-equipped film unit is compatible with photographic lenses. The focal length of the lens is about 35mm, and the screen size is normal 24 x 36mm for exposure. This is determined in advance by the focal length and screen size of the photographic lens. The shooting range is approximately 53° horizontally and approximately 37° vertically. The irradiation range of the built-in strobe device is also the shooting range mentioned above. The scope was set to allow for.

0004

[Problem that the idea aims to solve]

However, when shooting with the panoramic type lens-equipped film unit described above, The shadow range has a horizontal angle of view of 75° depending on the focal length of the photographic lens and screen size. , the vertical angle of view is 24°. In addition to the conventional stroke If the camera device is built in as is, it is obvious that the horizontal angle of view of the shooting range is Because the horizontal beam angle of the robot equipment does not allow for this type of lens-equipped fi Even when shooting with flash using the flash unit, both sides of the screen size are underexposed. There is a drawback that it becomes. Also, the vertical irradiation angle of the strobe device mentioned above is The angle of view in the vertical direction, which indicates the shooting range, is far greater than that of the panoramic type. Illuminates areas other than the shooting range of the film unit with lens, reducing the illuminance of the shooting range. There were some drawbacks.

[0005] The present invention was made to solve the drawbacks of the conventional technology, for example, Reliably accepts the shooting range of film units with lenses that have a wide left and right angle of view. The purpose of the present invention is to provide a strobe device with a high irradiation angle at a low cost.

[0006]

[Means to solve the problem]

In order to achieve the above purpose, this invention avoids reflective surfaces that widen the horizontal beam angle. A die-cut single plate member is bent so that the seam is located at the to form a reflector plate, and the reflective surface of the reflector widens the irradiation angle in the horizontal direction, The vertical irradiation angle is regulated by a diffuser plate.

[0007]

【Example】

In FIG. 2 showing the appearance of a lens-fitted film unit using the present invention, this The lens-fitted film unit is used by covering the unit body 10 with a paper box 11. . This paper box 11 includes a lens hood 12, a release button 13, and a winding knob 14. , a film counter display window 15, etc., a finder opening 16, a light emitting section 17, Holes were opened to expose finger grips 18 and 19, and photographs were taken through these holes. It is ready for operation. Please note that this film unit with lens is compatible with panoramic The aperture size can be adjusted to the full size of a regular 35mm film for photo creation. The size is 24 x 36 mm, and the aperture is wide at 12 x 36 mm. Also, as will be described in detail later, the focal length of the photographic lens 41 is 25 mm. Therefore, the shooting range has a horizontal angle of view of 75° and a vertical angle of view of 24°. Ru.

[0008] The unit main body 10 includes a main body part 20, a front cover 21, and a rear cover 22. . As shown in FIG. 3, the main body 12 has an exposure frame formed on the back side thereof. A film roll chamber 25 and a cartridge chamber 24 are provided. film row In the film chamber 25, the film pulled out from the cartridge is stored in the form of a roll. A winding knob 14 is provided above the cartridge chamber 24, and the winding knob 14 is By rotating the film clockwise, the film is removed from the film roll chamber 25. storage room 24.

[0009] The main body part 20 has a perforated film 18 partially exposed on its back surface. It includes a sprocket that engages with the suspension, a kicking lever 32, and a counter disc 23. A shutter drive mechanism 26 is incorporated therein. Then turn the winding knob 14 counterclockwise. When the film is wound up by one frame by rotating in the counterclockwise direction, the above-mentioned sprocket is The cartridge rotates once, and the counter disc 23 is advanced by one scale, and the shutter is opened. The winding knob 14 is locked. And the shutter button When you press 13, the tip of the kick lever 32 momentarily moves to the right in the figure. Filming is about to take place.

0010 A strobe board 40 is arranged on the front right side of the main body section 20. This strobe board 40 has a light emitting unit 43 at the top of the front, a charging switch 45 at the middle, and a battery 4 at the bottom. 7. A strobe circuit 48 including a main capacitor 44 is installed on the back. There is. The light emitting section 43 includes a discharge tube 61 and a reflector 60 as shown in FIG. 1(A). A diffusion plate 49 is arranged in front of these. The reflector 60 is a light Cut the bright aluminum into one piece as shown in Figure 4, and cut it at right angles from the crease indicated by the two-dot chain line. Left and right reflective surfaces 60a and 60b that widen the horizontal irradiation angle by bending are formed, and these sides 60f and 60g are connected to sides 60h and 60i of the lower reflective surface 60c. When curved surfaces are bent between the dotted lines shown in the figure to match each other, the result shown in Figure 5 is As shown, upper, lower, left, right, and rear reflective surfaces 60d and 60c surround the discharge tube 61. , 60a, 60b, and 60e are formed. Further, the diffusion plate 49 is shown in FIG. 1(A). By forming fine grooves horizontally on the back of the plastic plate, It is a Fresnel lens designed to narrow the beam angle.

[0011] An exposure opening 27 is provided in the center of the main body 20. Contact pieces 46a and 46b connected to the strobe circuit 48 are arranged above. Ru. These contact pieces 46a, 46b are made of conductive thin strips, and are spaced apart from each other by a certain distance. The contact pieces 46a are parallel to each other with a distance between them, and the contact pieces 46a are arranged in parallel with each other with a distance between them. Located on the road. One of the contact pieces 46a and 46b is a contact piece 46b. has a shorter length than the other contact piece 46a.

0012 A lens holder 28 is fitted into the opening 27. This lens holder 28 are the second lens 29, the spacing ring 30, the shutter blade 31, the shutter cover 35, and the second lens 29. 1 lens 37, and finally the retaining ring 39 is placed on the lens holder 28. These are integrated by fitting.

[0013] At the center of the spacing ring 30 is a diaphragm aperture 30 that determines the aperture diameter of the photographing lens 41. A is formed, and a stepped portion 30b is formed to surround this. This step 3 3 is provided with a notch, through which the shutter blade 31 enters and exits. The aperture aperture 30a can be opened and closed. The shutter blade 31 has a substantially V-shape. One end is pivoted to a pin 51 protruding from the front surface of the main body 20, and the other end has an aperture opening. An opening/closing plate 31a for opening and closing 30a is integrally formed.

[0014] The shutter blade 31 is opened and closed by a drive lever 33. Drive lever 33 is pivoted on a pin 57 implanted in the front of the main body 12, and is rotated counterclockwise by a spring 34. biased in the direction. The kick lever 3 is attached to one end 33a of the drive lever 33. 2, and a pin 33b is implanted at the other end. In addition, the drive lever The bar 33 includes a pressing portion 33c integrally provided on the right side of one end 33a thereof. ing. The pin 33b is formed into a bent portion that makes the shutter blade 31 V-shaped. The drive lever 33 is engaged with the slot 31b at the base of the shutter blade 31. , that is, the portion extending from the shaft 51 to the V-shaped bent portion. stop During the instantaneous movement of the kick lever 32 to the right, one of the drive levers 33 When the end 33a was kicked off, the drive lever 33 swung clockwise against the spring 34. Thereafter, it returns to its original position by the force of the spring 34.

[0015] When the drive lever 33 makes one reciprocating swing in this way, the pin 33b and the slot 3 1b, the shutter blade 31 swings back and forth once around the shaft 51 and opens. The closing plate 31a opens and closes the diaphragm aperture 30a to perform one exposure. Further shutter When the blade 31 opens the diaphragm opening 30a, the pressing portion 33c presses the contact piece 46a. Then, the contact piece 46a contacts the contact piece 46b. Further, the shutter blade 31 is connected to the aperture aperture 3. When 0a is closed, the pressing portion c is retracted upward from the contact piece 46.

[0016] The front cover 21 that covers the front surface of the main body 20 has an opening that exposes the photographing lens 41. lens hood 12, finder opening 16, finger rests 18, 19, etc. are integrated. Also, a part of the finger lever 19 is cut out. Due to its own elasticity, it can be pressed in the front and rear directions. This cut out part It is a strobe switch 19a, and on the back side of this switch 19a, the above-mentioned A shorting plate 52 is provided that contacts the charging switch 45 and short-circuits them.

[0017] The effect of the above configuration will be briefly explained. Press the strobe switch 19a Then, the shorting plate 52 short-circuits the charging switches 45a and 45b. This results in , the main capacitor 44 and the strobe circuit 4 are connected by the current supplied from the battery 47. The trigger capacitor included in 8 is charged.

[0018] Furthermore, press the shutter button 13 while pressing the strobe switch 19a. Then, the shutter drive mechanism 26 is released, and the kick lever 32 is activated as shown in FIG. Momentarily moves to the right from the cocking position. In the process of this movement, the lever is kicked away. The tip of the -32 kicks off one end 33a of the drive lever 33, pushing the drive lever 33 away from the bar. 34 in a clockwise direction. The swinging of this drive lever 33 is The signal is transmitted to the shutter blade 31 via the pin 33b and the slot 31b, and the opening/closing plate 31 a opens the diaphragm aperture 30a. At the same time as the diaphragm aperture 30a is fully opened, the drive lever is The pressing part 33c of the bar 33 presses the contact piece 46a from above and bends it. The contact piece 46a contacts the tip of the contact piece 46b.

[0019] At this moment, the trigger circuit in the strobe circuit 48 is short-circuited, and the trigger capacitor The charge stored in is discharged. If the trigger circuit is short-circuited in this way, the light emitting section A trigger signal for light emission is given to the discharge tube in 43, and the discharge tube is connected to the main capacitor 44. The electric charge stored in the flash discharges and emits strobe light.

[0020] The strobe light is illuminated on the subject via the diffuser plate 49, but the vertical direction of this illumination light is The irradiation angle in the direction is narrowed by the diffuser plate 49 as shown in FIG. The irradiation angle in the square direction is determined by the left and right reflective surfaces 60a and 60b as shown in FIG. 1(B). can be expanded. The irradiation range indicated by such horizontal and vertical irradiation angles is , the photographing range determined by the focal length of the photographing lens 41 and the size of the aperture. This makes it possible to reliably allow the surrounding area. In addition, the sides 60h, 60i and the sides 60f, 6 The seam with 0g avoids reflective surfaces 60a and 60b that widen the horizontal beam angle. Since it is bent to fit in the same position, the amount of light can be increased for horizontal irradiation The plan is to In addition, as shown in FIG. 1(B), the opening angle of the reflective surfaces 60a and 60b It is preferable that θ is about 70 to 80 degrees.

[0021] The above is an example of using the present invention in a film unit with a lens for panoramic photography. As explained above, this invention is applicable not only to film units with lenses, but also to low-speed film units. It can also be applied to a strike-type camera, etc.

[0022]

[Effect of the idea]

As explained above, according to the strobe device of the present invention, the reflector can be used to The beam angle is widened, and the vertical beam angle is controlled by the diffuser, so for example For example, this can be achieved by incorporating it into a panoramic type film unit with a lens. The vertical or horizontal illumination angle can be changed depending on the shooting range. In addition, refre The joint is located in the area that avoids reflective surfaces that widen the horizontal beam angle. Because it is bent and molded to The illuminance can be improved.

[Brief explanation of drawings]

FIG. 1 shows a light emitting section of a strobe device according to the present invention, with FIG. 1(A) being a longitudinal sectional view and FIG. 1(B) being a horizontal sectional view.

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

FIG. 3 is an exploded perspective view of essential parts of the lens-equipped film unit.

FIG. 4 is a developed view showing a reflector arranged in a light emitting part.

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

[Explanation of symbols]

13 Shutter button 14 Winding knob 19a Strobe switch 30a Aperture aperture 31 Shutter blade 32 Kick lever 42 Strobe board 49 Diffusion plate 60 reflector

Claims (1)

[Scope of utility model registration request] 1. In a strobe device that irradiates light from a discharge tube to a subject side via a reflector and a diffuser plate, the reflector has a seam located in a portion avoiding a reflective surface that widens the irradiation angle in the horizontal direction. 1 cut out like this
What is claimed is: 1. A strobe device formed by bending a plate member, wherein the reflective surface widens the horizontal irradiation angle, and the diffuser plate regulates the vertical irradiation angle.