JPH07120885A - Film unit with lens - Google Patents

Abstract

PURPOSE:To prevent an exposure unit from being separated from a main body part even when a film unit with a lens is shocked from the outside. CONSTITUTION:A pin 53 and a pin paired with the pin 53 are integrally formed inside a front cover 17. When the front cover 17 is locked on the main body part 15, the pin 53 and the other pin abut on the locking part 31 and the other locking part of the exposure unit 25, respectively. Thus, the exposure unit 25 locked on the main body part 15 through a catch is held between the main body part 15 and the pin 53 and the other pin. Since the unit 25 is not separated from the main body part 15 even when the unit main body is shocked, the inside of the main body part 15 is kept lighttight, thereby film loaded inside is prevented from being exposed by external light.

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 having excellent impact resistance.

[0002]

2. Description of the Related Art In order to make it easy to take a picture even if the camera is not carried,
(Product Name)] and other film units with lenses are provided. This lens-fitted film unit is disclosed in, for example, Japanese Patent Publication No. 2-332615.
An unexposed film is built in advance in a main body part in which a simple photographing lens and a film winding mechanism are incorporated, and a front cover and a rear cover are attached thereto. This lens-fitted film unit is widely used because it is possible to take a picture immediately on the spot of purchase and simply send it to a photofinishing shop even after the picture is taken.

By the way, the lens-fitted film unit is sent from a developing shop to a developing station. At the photo lab, the film cartridge with the photographed film is taken out from the film unit with lens and developed and printed. The negative film and the printed photograph are returned to the user, and the lens-fitted film unit from which the cartridge has been taken out is discarded.

Recently, due to the problems of reduction of industrial waste and environmental protection, recycling such as reuse of collecting and reusing the main body of the lens-fitted film unit has been carried out. In order to improve the reuse efficiency of the parts at the time of this recycling, in the lens-fitted film unit, the parts are being unitized, and the units are detachably assembled. For example, in an exposure unit in which a simple photographing lens, a film winding mechanism, and the like are unitized, the main body is fixed with a claw.

[0005]

However, the above-described conventional lens-fitted photo film unit releases the pawls between the exposure unit and the main body when it receives an impact due to a drop or the like during delivery or during photographing. However, there is a possibility that a gap is formed between them and the film is exposed by the external light entering the inside of the main body through the gap.

The present invention has been made in order to solve such a problem, and is an inexpensive unit that prevents the exposure unit from being separated from the main body when an external impact such as a drop is applied. It is to provide a film unit with a lens.

[0007]

To achieve the above object, in the lens-fitted photo film unit of the present invention, a protrusion is provided inside the front cover, and when the front cover is locked to the main body, the protrusion is provided. The portion is brought into contact with the exposure unit locked to the front surface of the main body, and the exposure unit is sandwiched between the projection and the main body.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 6 shows a lens-fitted film unit in which either a standard photographing mode or a panoramic photographing mode can be selected at the time of photographing. The lens-fitted film unit 2 is a resin unit body 3
And a paper box 4 for packaging this. On the front surface of the unit main body 3, a photographing lens 5, an operation knob 6 which is operated when switching a photographing mode, a viewfinder objective aperture 7 for defining a full size field of view having the same aspect ratio as a full size exposure screen, and this viewfinder objective aperture 7 A panoramic field of view 8 for defining a panoramic field of view having the same aspect ratio as a panoramic exposure screen to be inserted and removed, a strobe light emitting section 9, a charging switch 10, and a release button 11, a remaining frame number display window 12, and neon on the upper surface. Each tube lighting display window 13 is provided. Reference numeral 14 indicates a winding knob. In addition, paper box 4
Since a plurality of openings are formed in each of the openings and the taking lens 5 and the like are exposed from each opening, the lens-fitted film unit 2 carries out the shooting with the paper box 4 still attached.

The unit body 3 is composed of a body portion 15, a rear cover 16 and a front cover 17 shown in FIGS. The main body portion 15 includes an exposure frame 18 at the center, a cartridge chamber 19 and a film chamber 20 provided at both ends of the exposure frame 18. As shown in FIG. 4, a cartridge 21 is provided in the cartridge chamber 19, and a cartridge 21 is provided in the film chamber 20.
The unexposed photographic film 22 which has been pulled out from the roll and has been rolled is stored. Exposure frame 1 of the cartridge chamber 19
A protruding surface 19a is formed on the 8 side as shown in FIG. 5, and this protruding surface 19a is fitted to a rib 25a of an exposure unit 25 described later to shield the side surface of the exposure unit 25 from light and Performs vertical positioning.

A locking claw 24 is provided on the front side of the exposure frame 18.
And a locking claw 23 shown in FIG. 2 is formed, and the pair of locking claws 23 and 24 connect the exposure unit 25 to the main unit 1.
Claw it to 5. The exposure unit 25 includes a winding stop unit 26, an objective lens 27, and an eyepiece lens 28 (see FIG. 7).
A finder unit 29 having a two-piece structure is incorporated. In this exposure unit 25, a U-shaped rib 25a that engages with the outer periphery of the projecting surface 20a is attached to the side face of the cartridge chamber, and the locking claw 23 is engaged to the side face of the film chamber as shown in FIG. The plate-shaped locking portions 30 are integrally formed. A cylindrical locking portion 31 with which the locking claw 24 is engaged is integrally formed on the upper portion of the exposure unit 25.

After the exposure unit 25 is clamped, the printed circuit board 32 holding the strobe light emitting section 9 is locked to the front surface of the main body section 15. The printed circuit board 32 includes a main capacitor 33, a synchro switch 34, and a dry battery 3
Electrical contact pieces 36 and 37 that come into contact with both electrodes of No. 5 are attached. Reference numerals 5a and 29a denote the optical axis of the taking lens 5 and the optical axis of the finder, respectively.

As shown in FIG. 3, the front cover 17 includes a front cover main body 40 and a cover plate 41 which is fixed to the front surface by a claw.
And the panoramic visual field frame 8 incorporated between them. In the panoramic field frame 8, the operation knobs 6,
An opening 43 having an aspect ratio of 1: 2.8, a triangular mark 44 formed on the lower edge of the opening 43, a pair of notches 45 and 46, and a cam plate 47 are integrally formed.

A storage space 48 for storing the panoramic field frame 8 slidably in the direction of the arrow is formed in the front cover body 40. At the lower edge of this storage space 48,
A pair of click claws 5 fitted in the notches 45 and 46.
0, 51 are formed. When the operation knob 6 is slid and the click claw 50 is fitted into the notch 45, the panoramic view frame 8 is inserted into the viewfinder objective opening 7 and the click claw 51 is fitted into the notch 46. Then, the panoramic field frame 8 is click-stopped at the normal photographing position retracted to the outside of the finder objective aperture 7.

Inside the front cover body 40, as shown in FIG. 4, a pair of pins 52 and 53 are integrally formed.
The pins 52 and 53 are provided on the front cover main body 40 by the main body 15
When it is mounted on the
The exposure unit 25 is pressed against the main body 15. Further, the cover plate 41 has a finder objective aperture 7 and an operation knob 6.
And a slot 55 for exposing the outside to the outside.
When the operation knob 6 is slid from the left to the right in the slot 55 with the cover plate 41 attached to the front cover body 40, the panoramic view frame 8 slides from the normal photographing position to the panoramic photographing position and from the right to the left. Then, the panoramic field frame 8 moves from the panoramic shooting position to the normal shooting position.

In FIG. 7 showing the exposure screen size switching mechanism, the cam plate 47 is provided with an intermediate lever 60 provided above the finder unit 29 while the panoramic field frame 8 is being moved from the normal photographing position to the panoramic photographing position. Press. By this pressing, when the intermediate lever 60 is rotated counterclockwise against the bias of the spring 61, the rotatable crank lever 63 inserted inside from the side surface of the exposure chamber 62.
Rotate clockwise.

Inside the exposure chamber 62, a rotatable upper light-shielding plate 64 and a lower light-shielding plate 65 are mounted via shafts. The upper light-shielding plate 64 has an arm 67 having a pin 66 formed at the tip thereof, and the lower light-shielding plate 65 has the pin 6 formed thereon.
Arms 69 with which 6 abuts are respectively provided. Further, a spring 70 for biasing the upper light shielding plate 64 and the lower light shielding plate 65 in the opening direction is hooked on the arms 67 and 69. This spring 70 also includes the crank lever 63 and the cam plate 4.
The panoramic field frame 8 is urged via 7 in the direction of moving to the normal photographing position.

The crank lever 63 has an upper light-shielding plate 6
When the crank lever 63 is pivoted clockwise as described above, the upper light-shielding plate 64 is moved from the full-size position shown in FIG. 8 against the bias of the spring 70. It moves toward the panoramic position shown in FIG. At the same time, the lower light-shielding plate 65 is moved from the full-size position toward the panoramic position via the pin 66.

The upper light-shielding plate 64 is used for the taking lens 5,
A plurality of light shielding grooves 72 having a sawtooth cross section are integrally formed along the film feeding direction so that light passing through a shutter opening (not shown) is not internally reflected. Further, as shown in FIG. 7, the lower light-shielding plate 65 has a curved shape along the bottom surface of the exposure chamber 62 in order to reliably prevent flare due to internal reflection, and the edge 73 is L-shaped upward. It has a bent cross-sectional shape. As shown in FIG. 4, the edge 73 and the edge 74 of the upper light shielding plate are curved in the same direction as the film supporting surface of the rear cover 16 along the horizontal direction.

Next, the operation of this embodiment will be described. In the assembly line of the factory, the exposure unit 25 is placed in front of the exposure frame 18.
When the above is incorporated, the locking claw 23 is locked to the locking portion 30, and the locking claw 24 is locked to the locking portion 31, so that the exposure unit 25 is fixed to the main body portion 15. At this time, the exposure unit 25
The protruding surface 19a of the cartridge chamber 19 is fitted to the rib 25a of the. The printed circuit board 32 is placed in the film chamber 2
When it is attached to the front surface of 0, the assembly of the main body portion 15 is completed.

After the main body 15 is assembled, when the front cover 17 is locked to the main body 15, the pin 52 contacts the locking portion 30 and the pin 53 contacts the locking portion 31. As a result, the exposure unit 25 comes to be sandwiched between the main body 15 and the pins 52 and 53, and the rib 25a of the exposure unit 25 is fitted with the projecting surface 19a of the cartridge chamber 19 as described above. Since it is worn, the exposure unit 25
The connection between the main body 15 and the main body 15 becomes stronger. Therefore, even if an impact such as a drop is applied to the unit main body 3, the pawl stop between the exposure unit 25 and the main body 15 is not released.

After that, the cartridge 21 and the unexposed photographic film 22 pulled out from the cartridge 15 are loaded into the main body portion 15, and the rear cover 16 is attached, whereby the assembly of the unit main body 3 is completed. When the unit body 3 is loaded into the paper box 4, the lens-fitted film unit 2 is completed. The lens-fitted film unit 2 is shipped from the factory in a panoramic shooting mode in which the panoramic field frame 8 is inserted into the viewfinder objective aperture 7.

As described above, the lens-fitted film unit 2 shipped from the factory is sold to the user through the store and is used for photographing, but the lens is used during the delivery from the factory to the store and during photographing. Even if an object is dropped onto the attached film unit 2 from the top or the lens-attached film unit 2 is dropped and the unit body 3 is impacted, the exposure unit 25 and the body portion 15 are claw-stopped. Will not be released and the combined state of these will not deteriorate. Therefore, in the lens-fitted film unit 2, for example, external light enters through the gap between the exposure unit 25 and the main body 15 to expose the photographic film 22 stored in the main body 15, or the exposure unit 25. Due to the poor meshing with the main body portion 15, the feeding of the film does not deteriorate.

Such a lens-fitted film unit 2
Then, the shooting is performed as follows. The photographer who has purchased the lens-fitted film unit 2 first performs a film winding operation. Shutter charging is performed in conjunction with the film winding operation, the release button 11 can be pressed, and shooting preparation is completed. Here, the photographer selects either the standard photographing mode or the panoramic photographing mode. When shooting in the panoramic shooting mode, the release button 11 may be pressed as it is. When shooting in the standard shooting mode,
The operation knob 6 at the panoramic photographing position shown in (1) is pushed leftward and slid in the slot 55.

By this pressing, the click connection between the notch 46 and the click claw 51 is released, and the panoramic view frame 8
Moves from right to left in the storage space 48. By this movement, the intermediate lever 60 releases the pressing of the cam plate 47, and is rotated clockwise in FIG. 7 by the bias of the springs 61 and 70. The rotation of the intermediate lever 60 releases the pressing of the intermediate lever 60, and the crank lever 63 is rotated counterclockwise by the bias of the spring 70. When the crank lever 63 is rotated in this manner, the upper light shield 64
The lower light-shielding plate 65 and the lower light-shielding plate 65 respectively rotate in the opening direction by the bias of the spring 70.

When the operation knob 6 is further pressed to move the panoramic field frame 8 to the middle of the finder objective aperture 7,
The engagement between the intermediate lever 60 and the cam plate 47 is completely released. As a result, the intermediate lever 60 is moved by the springs 61, 70, and the crank lever 63, the upper light-shielding plate 64, and the lower light-shielding plate 65 are moved by the spring 70 so that they move in the standard photographing position direction and the full-size position direction. To be done.

After that, when the operation knob 6 is further pressed and the panoramic field frame 8 is completely sent out of the viewfinder objective opening 7, the click claw 50 is fitted into the notch 45. Due to this click stop, the panoramic field frame 8 will not enter the finder objective aperture 7 thereafter. At this time, the entire panoramic visual field frame 8 is hidden behind the cover plate 41.

By looking through the eyepiece lens 28 in this state, the subject can be observed within the full-size visual field. When the release button 11 is pressed, the subject is imprinted on the full-size screen of the film. After that, in the case of performing a new photographing, after performing the film winding operation, the standard photographing mode or the panoramic photographing mode by the operation knob 6 is appropriately selected, the framing is performed, and then the release button 11 is pressed. .

When shooting in the panoramic shooting mode after shooting in the standard shooting mode, the operation knob 6 is pressed to the right in the slot 55. By this pressing, the click connection between the notch 45 and the click claw 50 is released. When the operation knob 6 is further pushed to the right and slid, the panoramic field frame 8 is inserted into the viewfinder objective opening 7.

When the panoramic field frame 8 is inserted halfway, the cam plate 47 presses the intermediate lever 60, and the upper light shield plate 64 and the lower light shield plate 65 are mediated by the crank lever 63.
Against the bias of the spring 70, and rotate in the closing direction. When the operation knob 6 is slid to the panoramic photographing position, the panoramic field frame 8 is completely inserted into the finder objective aperture 7, and the upper light shielding plate 64 and the lower light shielding plate 65 are shown in FIG.
It is rotated to the panoramic position shown in. At this time, since the click claw 51 is fitted into the notch 46, thereafter, unless the operation knob 6 is slid, the panoramic field frame 8 is at the panoramic shooting position, and the upper light-shielding plate 64 and the lower light-shielding plate 65 are panoramic. Each position is maintained, and the exposure screen size becomes a panoramic size.

Looking through the eyepiece lens 28 in the above state, the subject can be observed within the panoramic field of view. When the release button 11 is pressed, the subject is displayed on the panorama size screen of the film. After that, the photographing is repeated, and when the photographing of all the frames is completed, the lens-fitted film unit 2 may be submitted to the developing station as it is. At the photo lab, the cartridge containing the exposed film is taken out and the film already photographed is developed. Since the photographed film has two types of exposure screen sizes, full size and panoramic size, the fact that it is displayed on the patrone simplifies the printing work in the photo lab.

In the above embodiment, the present invention has been described with respect to the lens-fitted film unit 2 incorporating the exposure screen switching mechanism. However, the standard type lens-fitted film unit [Shooting Run Hi (product name)], with a built-in strobe A film unit with a lens [Shooting Run Flash (product name)], a telephoto type film unit with a lens [Shooting Run is a telescopic shot (product name)], a close-up type film unit with a lens [Shooting Run close-up (trade name) )] And the like may be applied to the present invention. Further, in this embodiment, the pins 52 and 53 are integrally formed on the front cover 17 and brought into contact with the vicinity of the locking portions 30 and 31 of the exposure unit 25. However, the front cover 17 is provided with a projection, You may make it contact | abut on the front surface of 25.

As described above, in the lens-fitted film unit 2 of the present invention, the exposure unit 25 and the main body 1 are provided.
5, since the shape of the locking claws 23 and 24 is made small, and the locking claws 23 and 24 are integrally formed, the main body 15
Since the thickness of the unit can be reduced, the unit body 3 can be made compact.

[0033]

As described in detail above, in the lens-fitted photo film unit of the present invention, the projection is provided inside the front cover, and when the front cover is locked to the main body, the projection is fixed to the main body. Since the projection is brought into contact with the exposure unit so that the exposure unit is sandwiched between the projection and the main body, the connection between the exposure unit and the main body is made stronger, so that the exposure or the delivery is performed. In the meantime, even if an object is dropped on the lens-fitted film unit or the lens-fitted film unit is dropped and the unit main body receives a shock, the exposure unit is not separated from the main body. Therefore, since there is no gap between the exposure unit and the main body, the inside of the main body is kept light-tight, and the film is not exposed to external light.

[Brief description of drawings]

FIG. 1 is a view showing an engagement state of a locking claw of a main body portion, a locking portion of an exposure unit, and a pin of a front cover with each other.

FIG. 2 is an exploded perspective view showing a main part of a lens-fitted film unit.

FIG. 3 is an exploded perspective view showing a front cover of the lens-fitted film unit.

FIG. 4 is a cross-sectional view of a unit body.

FIG. 5 is a perspective view showing a main part of an exposure frame on the side of the cartridge chamber.

FIG. 6 is a perspective view showing an appearance of a lens-fitted film unit.

FIG. 7 is an exploded perspective view showing a main part of an exposure screen size switching mechanism.

FIG. 8 is a diagram showing a positional relationship between a pair of light shielding plates in a standard photographing mode.

FIG. 9 is a diagram showing a positional relationship between a pair of light shielding plates in a panoramic shooting mode.

[Explanation of symbols]

 2 Film unit with lens 3 Main unit 5 Photographic lens 15 Main body 16 Rear cover 17 Front cover 22 Photo film 25 Exposure unit 29 Winding stop unit 30, 31 Locking unit 40 Front cover main body 41 Cover plate 52, 53 pins

Claims (1)

[Claims] 1. A main body part in which an unexposed photographic film is preliminarily loaded, and a front surface of the main body part is detachably claw-fastened,
A lens-fitted film unit comprising an exposure unit incorporating a taking lens, a winding stop mechanism and the like, and a front cover that is locked to the front surface of the main body so as to cover the exposure unit, A protrusion is provided, and when the front cover is locked to the main body, the protrusion is brought into contact with the exposure unit to prevent the exposure unit from moving in the optical axis direction. Film unit with lens.