JP2005338227A - Film unit with lens - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a film unit with lens in which the following problem is not caused; a shrink film is heated in stroboscopic light emission, shrinks and whitens, whereby the light intensity of a strobe decreases. <P>SOLUTION: In the film unit with lens with a built-in simple photographing mechanism and a preliminarily loaded unexposed photo film, a part or the whole of an outer packing member which covers the photographing mechanism and a stroboscopic panel which transmits and emits at least stroboscopic light are covered with a shrink film in such a way that a predetermined gap is left between the stroboscopic panel and the shrink film. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a film unit with a lens that incorporates a simple photographing mechanism and is pre-loaded with an unexposed film.

  A lens-equipped film unit in which a simple photographing mechanism is built in and an unexposed film is loaded in advance is widely used for easy photographing.

  When a user takes a picture using a lens-equipped film unit, the development and printing are requested to a photo shop or a DPE shop. At these stores, the requested lens-equipped film unit is sent to a laboratory. In the lab, the rear cover is removed, the film is taken out, and the development process is performed. Usable units and parts are reused for newly produced lens-equipped film units (reuse), and unusable units and parts are dismantled and crushed, then re-molded into pellets (recycled) )doing.

  Some lens-equipped film units have a built-in strobe, so that images can be taken well even in low-brightness conditions indoors or at night.

Furthermore, some or all of the lens-attached film units are covered with a shrink film to improve dustproofness and dripproofness, and improve reuse properties (see, for example, Patent Documents 1 to 3).
JP-A-5-265141 JP-A-9-61969 Japanese Utility Model Publication No. 3-60342

  In a film unit with a lens that has a built-in strobe, a strobe panel that covers and protects the xenon tube and the reflector is also provided outside while transmitting the strobe light emitted from the xenon tube and reflected by the reflector. .

  If you want to improve the dust resistance, drip-proof property, or reusability by covering a part or the whole of the film unit with a built-in lens with a shrink film, the strobe panel is also covered with the shrink film. Will do.

  In this case, the air in the space substantially sealed by the strobe panel and the reflector is heated by the heat generated from the xenon tube during strobe light emission. As a result, the strobe panel is also heated. Therefore, when the strobe panel and the shrink film are in close contact with each other, the shrink film is also heated, which causes the shrink film to shrink and whiten, resulting in a problem that the amount of light of the strobe decreases.

  The present invention has been made in view of such problems. When a part or the whole of a film unit with a built-in lens and at least a strobe panel is covered with a shrunk film, the shrunk film is heated and shrunk at the time of strobe light emission. It is an object of the present invention to provide a lens-fitted film unit that does not cause a problem of whitening and a reduction in the amount of light of a strobe.

  The above object is achieved by the following means.

  In a film unit with a lens having a simple photographing mechanism and pre-loaded with an unexposed film, a part or the whole of an exterior member that covers the photographing mechanism and a strobe panel that transmits at least a strobe light A film unit with a lens, wherein the film unit is covered with a shrink film, and a predetermined gap is provided between the strobe panel and the shrink film.

  According to the lens-attached film unit of the first and second aspects, the shrink film is not in close contact with the strobe panel, and the predetermined gap is provided. Such a problem that the shrink film shrinks and whitens and the amount of light of the strobe is reduced does not occur.

  According to the film unit with a lens according to claims 3 and 4, since the predetermined through hole is provided in the portion of the shrink film facing the strobe panel, air between the strobe panel and the shrink film escapes to the outside, Furthermore, the shrink film is rarely heated.

  An embodiment of a film unit with a lens according to the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a lens-fitted film unit coated with a shrink film, and FIG. 2 is a cross-sectional view of a strobe light emitting unit.

  In FIG. 1, a photographing lens 1, a finder objective lens window 2, a strobe panel 3, and a strobe button 4 are arranged on the front surface, and a release button 5, an indexer window 6, and a charging display window 7 are arranged on the top surface. A winding knob 8 is arranged on the side. And an unexposed film is loaded in advance in the production process.

  During normal shooting, the film is rolled up with the winding knob 8 and the shutter is charged. The subject is viewed from the finder eyepiece window (not shown) through the finder objective lens window 2, the composition is set, and the release button 5 is pressed. A light image of the subject is formed on the film by the taking lens 1. Then, the number of frames to be photographed can be confirmed with the indexer window 6.

  At the time of flash photography, if the flash button 4 is pressed, charging of the flash starts, and when charging is completed, the charging display window 7 is turned on. Similarly, when the release button 5 is pressed, the strobe light emitted from the internal xenon tube 21 shown in FIG. 2 and reflected by the reflector 22 passes through the strobe panel 3 and irradiates the subject. Appropriate exposure can be obtained even in the state of brightness. In addition, the strobe panel 3 covers and protects the internal xenon tube 21 and the reflector 22 so that the strobe light that cannot be reflected by the reflector 22 and diffuses outside the angle of view is condensed within the angle of view. It is formed into a Fresnel lens shape.

  Charging continues even if the hand is released from the strobe button 4. Thereafter, when the battery is fully charged, the charging is naturally stopped. However, if the flash photography is not performed, the charging voltage is lowered. Therefore, in order to perform flash photography at this time, the flash button 4 may be pressed again.

  Various simple photographing mechanisms that perform such operations are housed inside, and these photographing mechanisms are covered with an exterior member 10, and the exterior member 10 and the like are further covered with a shrink film 11. The shrink film 11 has a property of shrinking due to heat, and after covering the exterior member 10, the shrink film 11 is contracted by applying heat to adhere to the exterior member 10. The shrink film 11 covers the entire exterior member 10 and at least the strobe panel 3.

  A portion of the shrink film 11 facing the photographing lens 1, finder objective lens window 2, finder eyepiece window (not shown), strobe button 4, release button 5, index window 6, charging display window 7 and winding knob 8. Since these are perforated, they will not interfere with their operation.

  Further, since the shrink film 11 is colored in advance with a predetermined color, holes and depressions provided in the exterior member 10 for production reasons, sink marks in the exterior member 10, parting lines, weld lines, two parts The unsightly places such as the gaps between the contact parts and the screw heads screwed with the internal parts are hidden.

  Further, the shrink film 11 is given a predetermined design and printed together with a product name and a description of a simple photographing method.

  Therefore, the paper cover and the label provided in the conventional film unit with a lens are unnecessary.

  It should be noted that a colorless and transparent material is used for the shrink film 11 so that a portion facing the finder objective lens window 2, the finder eyepiece window, the indexer window 6, the charging display window 7 and the like is not perforated and is visible as it is. It may be.

  By covering the shrink film 11 on the exterior member 10 as described above, the shrink film 11 is in close contact with the exterior member 10, and the dust resistance and drip resistance can be improved as compared with the related art. As a result, the internal parts and units are less damaged, the number of reusable parts and units is increased, and the reusability is improved. In addition, since only a part of the exterior member is conventionally covered with a paper cover or a label, there are many exterior members that cannot be reused due to wrinkles or the like by the user. However, the entire exterior member 10 is covered with the shrink film 11. By coating, wrinkles by the user are greatly reduced and reusability is improved.

  Here, since the reflector 22 including the xenon tube 21 is sealed by the strobe panel 3, the air in the space substantially sealed by the strobe panel 3 and the reflector 22 by the heat generated from the xenon tube 21 when the strobe emits light. Is heated. As a result, the strobe panel 3 is also heated.

  However, in the present embodiment, since the strobe panel 3 and the shrink film 11 are not in close contact with each other and have a predetermined gap D, the heat of the strobe panel 3 is difficult to be transmitted to the shrink film 11. The gap D is desirably 0.5 mm or more and 4 mm or less. If the gap D is 0.5 mm or less, the heat of the strobe panel 3 is easily transmitted to the shrink film 11. The thickness of the film becomes thick, which is not preferable for commercial purposes.

  Further, as shown in FIG. 3, a plurality of through holes 11a may be provided in the portion of the shrink film 11 facing the strobe panel 3, so that heat between the strobe panel 3 and the shrink film 11 can be released to the outside. The total area of the through holes 11a with respect to the area of the portion of the shrink film 11 facing the strobe panel 3 is desirably 5% or more and 20% or less.

  In addition, if it is 5% or less, the heat dissipation effect is low, and there is a possibility of shrinkage / whitening. In the experiment, whitening occurred at 3%. Moreover, since the ratio of a through-hole will increase that it is 20% or more, the effect of dust-proof and drip-proof cannot be expected.

  In some cases, the entire exterior member 10 may not necessarily be covered with the shrink film 11, and there may be a portion that is not covered on a part of the side surface, the back surface, or the bottom surface.

  In consideration of removing the shrink film 11 at the time of reuse, a string such as that provided at the takeout port of the transparent sheet covering the cigarette box is provided in a place where the user's hand is difficult to touch such as the bottom surface. Also good. By pulling the string, the shrink film 11 can be easily broken.

It is a perspective view of a film unit with a lens which covered a shrink film. It is sectional drawing of a strobe light emission part. It is the elements on larger scale of the shrink film which provided the several through-hole.

Explanation of symbols

3 Strobe panel 10 Exterior member 11 Shrink film 11a Through hole 21 Xenon tube 22 Reflector umbrella D Gap

Claims (4)

In a film unit with a lens that has a simple shooting mechanism and is pre-loaded with unexposed film,
Covering a part or the whole of the exterior member that covers the photographing mechanism, and at least a strobe panel that transmits and emits strobe light with a shrink film,
A film unit with a lens, wherein a gap is provided between the strobe panel and the shrink film. The film unit with a lens according to claim 1, wherein the gap is 0.5 mm or more. The film unit with a lens according to claim 1 or 2, wherein a predetermined through-hole is provided in a portion of the shrink film facing the strobe panel. The film unit with a lens according to claim 3, wherein the total area of the through holes with respect to the area of the portion of the shrink film facing the strobe panel is 5% or more and 20% or less.

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