JPH08220699A - Stroboscope built-in type film unit equipped with lens - Google Patents

Abstract

PURPOSE: To incorporate a stroboscopic device having optimum light distribution with a unit main body irrespective of the size of the unit main body by forming a rising part which projects stepwise on a part of the unit main body and covering the strobe light emitting part with the rise part. CONSTITUTION: The depth of the unit main body 31 is narrower than the depth of the stroboscopic device 20, then, when the stroboscopic device 20 is incorporated with the unit main body 31, the front part of the strobe light emitting part 22 projects over the surface of a front cover 34. The projecting part is covered with the rising part 43 installed on the front cover 34, the surface of a diffusion plate is exposed outside the unit main body 31. When an object is irradiated with the strobe light, the strobe light emitting part 22 projects over the surface, the depth of a reflector is satisfactorily secured, then, the strobe light is efficiently condensed and the optimum light quantity can be given.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens-fitted film unit incorporating a strobe device for emitting strobe light.

[0002]

2. Description of the Related Art A film unit with a lens is manufactured and sold by the applicant of the present invention so that a photograph can be enjoyed easily at any time. The film unit with a lens is a unit in which a shooting mechanism such as a shooting lens and a shutter device is incorporated, and the photo film is built in advance. It is widely used because it is convenient to put it in a store. Some such film units with lenses are, for example,
Some flash devices (such as "Flash") are equipped with a strobe device to enable shooting at night or indoors.

In order to improve portability, various attempts have been made to reduce the size of the lens-fitted film unit. As an example of a small-sized film unit with a lens, a part of the unit main body with a built-in patrone is projected in a semi-cylindrical shape following the outer diameter of the patrone, and the part with the taking lens is set as the focal length of the taking lens. The present applicant has proposed that the thickness of the cartridge is equal to or less than the outer diameter of the cartridge except that the cartridge is projected to the corresponding position. According to this, not only can the appearance be considerably thinned as compared with the conventional one, but it can be easily put in the pocket when not in use.

FIG. 5 shows an example of a lens-fitted photo film unit having a built-in strobe device (hereinafter referred to as a strobe built-in type photo film unit with lens). The unit main body 11 is mainly made of plastic and is entirely covered with the exterior body 12. The exterior body 12 is for making the appearance of the lens-fitted film unit clean, and a paper box or the like having a printed surface is used. The exterior lens 12 has a required portion for exposing the taking lens 13, the viewfinder objective window 14, the shutter button 15, the winding knob 16, the counter window 17, the strobe charging switch 18, and the strobe light emitting portion 22 of the strobe device to the outside. An opening is provided, and this exterior body 12 is attached to the unit main body 1
The shooting operation can be performed with the camera 1 still covered.

As shown in FIG. 6, the strobe device 20 is
It is composed of a printed circuit board 21 on which a control circuit for charging or discharging is formed, and a strobe light emitting section 22 for emitting strobe light. Strobe light emission unit 22
Is a discharge tube 24 for emitting strobe light to the inside rear side of the housing 23, and a reflector 25 that covers the back side of the discharge tube 24 and reflects the light emitted from the discharge tube 24 forward. And a diffusing plate 26 is attached to the open front surface of the housing 23. Reflective umbrella 2
The aperture width H of 5 is determined by the focal length of the taking lens 13 and the size of the subject screen, and the diffusion plate 26 is formed larger than the aperture of the reflector 25. In addition, the unit body 11
On the back side of the stroboscopic light emitting section 22, a main capacitor 27 for stroboscopic light emission, which has the largest volume among various electronic components arranged on the printed circuit board 21, is formed so as not to make useless space inside. It is placed sideways.
The strobe device 20 is arranged so that the surface of the diffusion plate 26, which is the stroboscopic light emitting surface, is exposed to the outside of the unit main body 11.

[0006]

It is desired to reduce the size of such a film unit with a built-in strobe lens as well. As for the above-described lens-equipped film unit 10 with a built-in strobe, in which the main condenser 27 is arranged on the back side of the strobe light emitting portion 22, the storage space of the strobe light emitting portion 22 is reduced as the size is reduced. Become. However, as described above, the opening width H of the reflecting umbrella 25 is predetermined depending on the size of the subject screen. Therefore, if the depth D of the stroboscopic light emitting section 22 is made shallow without changing the opening width H, the reflecting umbrella 25 is not reflected. The aperture angle of 25 becomes large and the amount of stroboscopic light diffused to the outside of the subject screen increases, which causes a problem that a sufficient amount of stroboscopic light cannot be given to the subject. For this reason, it has been very difficult to achieve downsizing, particularly thinning, in the film unit with a built-in strobe lens.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a film unit with a built-in strobe lens which can be downsized without deteriorating the distribution of strobe light. And

[0008]

In order to achieve the above object, a lens-equipped film unit with a built-in strobe according to the present invention is provided with a front surface and an upper surface of a unit main body in order to cover a stroboscopic light emitting section incorporated in the unit main body. , And side 3
A ridge protruding from the corner of the surface with a step, and a front surface forming the corner of the unit body;
An exposed opening for projecting the raised portion is formed over each of the covering surfaces of the exterior body covering the upper surface and the side surface.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a lens-equipped film unit 30 with a built-in strobe according to the present invention. Members common to those shown in FIGS. 5 and 6 are designated by the same reference numerals. Is attached. The unit body 31 is mainly made of plastic and is covered with a paper box 32 whose surface is printed to make its appearance beautiful. At a required portion of the paper box 32, the photographing lens 13,
Viewfinder objective window 14, shutter button 15, winding knob 16, counter window 17, strobe charging switch 1
8 and an opening for exposing the stroboscopic light emitting section 22 to the outside are provided.

As shown in the exploded view of FIG. 2, the unit main body 31 includes a main body 33, a front cover 34 which covers the upper surface, front surface, and left and right side surfaces thereof, and the main body 33.
And a rear cover 35 that covers the back surface of the. The main body portion 33 is integrally formed with a cartridge chamber 37 for accommodating the cartridge 36 and a film roll chamber 39 for accommodating the photographic film 38 drawn out from the cartridge 36. On the front surface of the main body 33, the exposure unit 4 in which the taking lens 13 and the shutter mechanism are assembled.
No. 0 and the strobe device 20 are attached to the upper side, and are sandwiched between the front cover 34 and the rear cover 35.
The unit body 31 is configured so that its average thickness is equal to or less than the outer diameter of the cartridge 36.
The part in which the exposure unit 40 and the strobe device 20 are assembled is slightly projected.

A shutter button 15 and a counter window 17 are integrally formed on the upper surface of the front cover 34. A finder objective window 14 is integrally formed on the front surface, and a semi-cylindrical bulging portion 41 following the outer wall shape of the cartridge chamber 37 formed in the main body portion 33 and a raised portion protruding in a stepped shape are formed. 42 and 43 are formed. Bulge 4
Reference numeral 1 covers the outer wall of the cartridge chamber 37 and is also used as a grip when using the strobe built-in type lens-fitted film unit 30. The raised portion 42 covers the peripheral portion of the taking lens 13 assembled to the exposure unit 40, and the raised portion 43 covers the front portion of the strobe device 20. A finder eyepiece window 44 is formed on the rear cover 35.

The strobe device 20 is a unit in which a strobe circuit for controlling charging and discharging is mounted on a printed circuit board 21 to form a unit, and a strobe light emitting portion 22 for emitting strobe light and a charge for strobe light emission. A cylindrical main capacitor 27 for accumulating, a battery holder 46 for holding a battery 45 for a power source, and a synchro contact 47 for activating a discharge circuit when short-circuited by the shutter mechanism of the exposure unit 40. There is. The main capacitor 27 is soldered horizontally on the back side of the strobe light emitting section 22. Further, on the front surface of the printed circuit board 21, a printed contact 49 for activating the charging circuit when short-circuited by the contact piece 48 is provided.

As shown in FIG. 3, since the depth D2 of the unit main body 31 is shallower than the depth D1 of the strobe device 20, when the strobe device 20 is incorporated in the unit main body 31, the stroboscopic light emitting portion 22 will be exposed. The front part projects beyond the surface of the front cover 34. The projecting portion is covered by the raised portion 43 provided on the front cover 34, and the surface of the diffusion plate 26 is exposed to the outside of the unit main body 31.

FIG. 4 is an exploded view of the paper box 32 covering the unit main body 31 having the above-described structure.
The paper box 32 includes a rear cover part 51 and an upper cover part 5 in order to wrap each side of the box-shaped unit main body 31.
2, a front cover part 53, a bottom cover part 54, and left and right side cover parts 55, 56. Further, a glue margin piece 57 is continuously provided on the top surface cover portion 52, the bottom surface cover portion 54, and the left and right side surface cover portions 55 and 56.

Openings 61, 62, 63 are formed in the back cover portion 51 and the top cover portion 52. The finder eyepiece window 44 is opened through the opening 61, the shutter button 15 is opened through the opening 62, and the counter window is opened through the opening 63. Expose 17 respectively. Further, a notch 64 is formed from the back cover part 51 to the top cover part 52, and the winding knob 16 is projected from this.

An exposure opening 65 is formed over the three surfaces of the upper surface cover portion 52, the front surface cover portion 53, and the right side surface cover portion 56. A protruding portion 43 that covers the stroboscopic light emitting portion 22 is projected from the exposure opening 65. Further, openings 66, 67, 68 are formed in the front cover portion 53, and a pair of cuts 69 are provided at a position serving as a boundary between the top cover portion 52 and the bottom cover portion 54. The notch 69 is for bending the paper box 32 so as to follow the surface shape of the semi-cylindrical bulging portion 41, and reaches the left side surface cover portion 55 from a position corresponding to the right end of the bulging portion 41. There is. The raised portions 42, the viewfinder objective window 14, and the strobe charging switch 18 are exposed through the openings 66, 67, and 68, respectively.

The paper box 32 is assembled into a box shape by folding along a mountain fold line indicated by a dot-dash line and a valley fold line indicated by a broken line, and a part surrounded by a pair of notches 69 and a valley fold line is formed. It is bent in a semi-cylindrical shape so as to project to the surface side. When the unit main body 31 is housed inside, the glue margin piece 57 is glued.

The film unit with a built-in strobe lens 30 has a thin overall structure, except that a portion in which the cartridge 36, the photographing lens 13, and the strobe light-emitting portion 22 are housed is slightly projected, and the film unit with a lens is also provided. Since the ratio of each protrusion to the whole 30 is small, a considerably thin appearance can be achieved.

When purchasing this photo film unit 30 with a built-in strobe lens and taking a picture, the photographer first rotates the winding knob 16 until the rotation is locked and charges the shutter to take a photograph. Prepare.

When the flash photographing is performed, when the strobe charging switch 18 exposed on the front surface of the lens-fitted film unit 30 with a built-in strobe is pressed, the contact piece 48 is pressed to short-circuit the print contact 49. As a result, the charging circuit operates and the electric charge supplied from the battery 45 is accumulated in the main capacitor 27.

After that, when the photographer frames the subject to an appropriate position and presses the shutter button 15, the shutter blades are opened and closed, and the synchro contact 47 is short-circuited with the opening operation of the shutter blades. As a result, the discharge circuit operates and the discharge tube 24 emits light due to the electric charge accumulated in the main capacitor 27, and strobe light is emitted toward the subject. At this time, the stroboscopic light emitting portion 22 projects from the surface of the lens-fitted film unit 30 with a built-in strobe, and the depth of the reflector 25 is sufficiently secured, so that the stroboscopic light emitted from the discharge tube 24 is within the subject screen. It is possible to give a proper amount of stroboscopic light to the subject by condensing light without waste.

In the above embodiment, the example in which the strobe device is incorporated in the thinned unit main body so that the front portion of the stroboscopic light emitting portion is projected is described. However, the raised portion covering the stroboscopic light emitting portion is provided in the unit main body. By forming it so that it straddles the top surface and side surfaces so that the upper part or side part of the strobe light emitting part also projects from the unit body, it is suitable even for a lens-fitted film unit with a reduced width or height. It is possible to incorporate a strobe device having a good light distribution property. Even in this case,
Since the proportion of the protrusions to the entire lens-fitted film unit is small, the overall compact image is not impaired. Since the paper box described in the above embodiment is already formed with the exposure opening so as to straddle the upper surface cover portion and the right side surface cover portion, the paper box is used as it is to form the raised portion on the upper surface or the side surface. The unit body can be covered.

Further, in the above embodiment, an example in which the main capacitor is arranged behind the strobe light emitting part has been described, but the main capacitor is arranged at another position, for example, a place for accommodating the battery for the power source, and the strobe light emitting part is arranged. A battery may be arranged behind the. Of course, you may arrange | position circuit components other than a battery.

[0024]

As described above, according to the present invention, a stepped projecting portion is formed in a part of the unit body, and the strobe light emitting portion is covered by this raised portion, so that the strobe light emitting portion storage space is provided. The size of the unit body can be reduced without reducing the size. As a result, a strobe device having an appropriate light distribution can be incorporated regardless of the size of the unit main body, and a sufficient amount of strobe light can be condensed in the subject screen without waste. In addition, since the proportion of the ridges to the entire lens-fitted film unit is small, the compact image of the entire lens-fitted film unit is not impaired.

Further, since the exposed opening for projecting the raised portion is formed so as to extend over the respective covering surfaces of the exterior body which covers the front surface, the upper surface and the side surface of the unit body, the thickness, width, and In addition, the stroboscopic light emitting unit can be made compact in all directions of height, and the storage space for the stroboscopic light emitting unit is given a degree of freedom, so that a more accurate stroboscopic light emitting unit can be configured without being restricted in size. It becomes possible.

[Brief description of drawings]

FIG. 1 is an external view of a film unit with a built-in strobe lens of the present invention.

FIG. 2 is an exploded perspective view of the unit main body shown in FIG.

FIG. 3 is a cross-sectional view of the main parts of the unit body shown in FIG.

FIG. 4 is a development view of the paper box shown in FIG.

FIG. 5 is an external view of a conventional film unit with a built-in strobe lens.

6 is a cross-sectional view of a main part of the unit main body shown in FIG.

[Explanation of symbols]

10,30 Film unit with built-in strobe lens 11,31 Unit body 12,32 Paper box 20 Strobe device 22 Strobe light emitting part 24 Discharge tube 25 Reflector 27 Main capacitor 42,43 Raised part 65 Exposed opening

Claims (1)

[Claims] 1. A unit main body incorporating a photographic film and a photographing mechanism, and a strobe device having a stroboscopic light emitting portion including a discharge tube, a reflector and a diffuser, and an exterior body covering the surface of the unit main body. Consists of
In a film unit with a built-in strobe lens capable of performing a photographing operation through an opening formed in a required portion of an exterior body, a front surface, an upper surface, and a side surface of the unit main body for covering a stroboscopic light emitting unit incorporated in the unit main body. The protrusions are provided at the corners formed by the three surfaces with a step, and the protrusions are straddled over the respective covering surfaces of the exterior body that covers the front surface, the upper surface, and the side surfaces forming the corners of the unit body. A film unit with a built-in strobe lens, which is formed with an exposed opening for projecting.