JPH1165035A - Film unit with lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent resale after improperly refilling a film. SOLUTION: On the upper surface edge of a wind knob 9, letters 30 that designate the name of a manufacturer or a sales company are integrally molded. The vertical lines of the letters 30 oriented toward the center of the wind knob 9 are formed by slit holes 31 that penetrate the wind knob 9. Reverse rotation preventing claws 35, 36 that are formed on a front cover 13 and a rear cover 18 respectively engage with a slit hole 31 each elastically and thus, when the wind knob 9 is rotated in the winding direction, permit the rotation while being elastically deformed, but, when the wind knob is about to be rotated backward, they engage with the slit hole 31 each so as to lock the rotation. If the letters 30 are shaved off or buried in order to reuse the unit body, the prevention of the reverse rotation by means of the reverse rotation preventing claws 35, 36 can not be executed, so that the function of the wind knob 9 is impaired. Thereby, it is prevented that a unit which is recomposed by refilling a new film cartridge in the original unit body misappropriated as it is unfairly sold.

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 which prevents the unit body from being reused irregularly.

[0002]

2. Description of the Related Art A film unit with a lens has a built-in simple photographing mechanism and is composed of a unit main body in which a cartridge film is loaded in advance and a paper box which covers the unit, and is inexpensive and easy to use. Widespread.

The unit main body includes a main body base in which a cartridge chamber for housing a cartridge and a film roll chamber for housing a film roll are integrally formed, and is provided on the front surface of the main body base and includes a photographing lens and a shutter mechanism. An exposure unit, a rear cover for closing the cartridge chamber and the film roll chamber containing the cartridge and the film roll from the back of the main body base in a light-tight manner, and a front cover integrally formed with a release button to cover the exposure unit. It is composed of The unexposed film is pulled out of the film roll chamber by the winding operation, and the shutter is charged in conjunction with the winding operation, and the photographing is performed by pressing the release button. Then, the exposed film is wound up and stored in a cartridge by a winding operation.

After using a film unit with a lens,
Submitted to the lab as is. At the photo lab, the exposed film is taken out of the unit body for development and print processing, but the used unit body itself is not returned to the user, but is collected by the manufacturer and the unit body is disassembled for each part Is done. Since most of the components are resin molded products, if the components are so severely damaged that they cannot be reused, they are crushed and melted and used again as raw materials as resin pellets. Further, the exposure unit can be reused as it is if no abnormality is found by performing a function test.

[0005] Of these parts, the main body base and the rear cover are parts that come into direct contact with the film.
It is desirable to avoid reuse as it is. If any of these parts is slightly damaged, there is a risk that the emulsion surface or the base surface of the film will have a scratch or a scratch, which will not be able to restore the quality of the photographic image. For this reason, the rear cover is only reused as a raw material after crushing and melting.

However, recently, a third party, mainly a developer, other than the manufacturer of the film unit with the lens, took out the film from the film unit with the lens, which was requested to develop and print by the photographer. There is a situation in which a large number of units sold after loading a new film cartridge without permission are diverted to the market.

[0007] Reuse of the unit body without function guarantee without proper quality inspection of each part of the unit body to be reused may cause deterioration of photographic quality such as damage to newly loaded film. Also, there is a possibility that proper photographing cannot be performed due to an operation failure due to deterioration of the photographing mechanism. In this way, reloading and selling a film cartridge without performing necessary quality inspections and the like has caused adverse effects such as lowering the reliability of a film unit with a lens for general users. .

To cope with these problems, characters or marks representing the name of the manufacturer or sales company are integrally provided on the front cover and the rear cover by injection molding, or a part of the unit main body (for example, the main body base and the rear cover) is provided. We take measures to make it difficult to disassemble by welding with ultrasonic waves.

[0009]

However, characters and marks formed integrally by injection molding can be deleted by shaving or filling, and ultrasonic welding can be performed only partially, thus completely preventing refilling. I couldn't.

The present invention has been made in consideration of the above circumstances, and has as its object to provide a lens-fitted film unit capable of preventing resale due to irregular film refilling.

[0011]

According to the present invention, in order to achieve the above object, according to the first aspect of the present invention, at least one of a top surface and a side surface of a winding knob exposed to the outside of a unit main body is provided by a manufacturer or a seller. A mark or character representing a company name is integrally formed. According to the second aspect of the present invention, it is elastically engaged with the convex or concave portion forming the mark or character, and when the winding knob is rotated in the film winding direction, it is elastically deformed to allow its rotation. In the case of a reverse rotation operation, a reverse rotation preventing claw is provided which engages with the convex or concave portion to prevent its rotation.

[0012]

FIG. 5 shows the appearance of a film unit with a lens according to the present invention. In FIG. And an external label 3 attached thereto. The exterior label 3 has an opening and the like for exposing the photographing lens 4, the finder window 5, and the like. On the front surface of the film unit with a lens, in addition to the photographing lens 4 and the finder 5, a strobe light emitting unit 6 is provided.
A film counter window 8 is provided, and a winding knob 9 is provided on the back.

As shown in FIG. 6, the unit main body 2 includes a front cover 13, a main body base 14, an exposure unit 15, a strobe unit 16, a film cartridge 17, and a rear cover 18. The main body base 14 has a cartridge chamber 21 for storing the cartridge 20 of the film cartridge 17 on one side, and a film roll chamber 23 for storing a film roll 22a formed by rolling the film 22 drawn from the cartridge 20 on the other side with the aperture 19 interposed therebetween. Are provided integrally. The rear cover 18 is attached to the back side of the main body base 14, and the cartridge chamber 21 and the film roll chamber 23 are covered.

The exposure unit 15 incorporates a photographing lens 4, a shutter mechanism, a film counter mechanism, a finder optical lens 24, a film unwinding mechanism, and the like, which are integrated. The front cover 13 is attached to the front side of the main body base 14 from the horizontal direction. The strobe unit 16 performs strobe charging in response to a pressing operation of a strobe charging start button 13a provided on the front surface of the front cover 13, and emits strobe light from the strobe light emitting unit 6 in conjunction with a shutter mechanism.

The rear cover 18 is provided with bull-top type bottom covers 18a and 18b for closing the bottoms of the cartridge chamber 21 and the film roll chamber 23, respectively. Assembled. After assembling the rear cover 18, the bottoms of the chambers 21 and 23 are closed by these bottom covers 18 a and 18 b, so that the film cartridge 17 is closed.
Is stored light-tight. The bottom cover 18a closing the bottom of the cartridge chamber 21 is opened when the cartridge 20 containing the film 22 photographed in the developing station is taken out.

On the cartridge chamber 21, a hoisting knob 9 having a tooth row formed around the side surface is rotatably provided. A part of the winding knob 9 is exposed from an opening 25 of the rear cover 18. When the cartridge 20 is loaded into the cartridge chamber 21, the shaft of the winding knob 9 is moved through the opening in the upper wall of the cartridge chamber 21.
With the spool 26. When the film winding operation is performed, the unexposed film 22 is pulled out of the film roll chamber 23 and set in the aperture 19, and the exposed film 22 is stored in the cartridge 20. After the mechanism is charged, the winding stop mechanism operates, and further operation of the winding knob 9 is prevented.

When the release button 7 is pressed, the shutter mechanism of the exposure unit 15 operates. In conjunction with this operation, the operation of the film unwinding mechanism is released. Thereby, rotation of the driven sprocket and the hoisting knob 9 becomes possible, and the next hoisting operation is allowed.

In the process of rotating the hoisting knob 9 after the shooting of the last frame of the film 22, the driven sprocket becomes free, and even if the hoisting knob 9 is rotated in this state, the winding is not stopped. , The entire film 22 can be wound into the cartridge 20.

In FIG. 1, a character 30 (in this case, “ABCDEFG”) representing the name of a manufacturer or a selling company is integrally provided on the upper end surface of the above-mentioned hoisting knob 9.
The character 30 is formed integrally with the upper end surface of the winding knob 9 during the injection molding of the winding knob 9. Since the character 30 is always exposed from the opening 25 of the rear cover 18, the character 30 is seen when the user operates the hoisting knob 9 with a finger to perform the hoisting operation, and the name of the manufacturer or sales company can be confirmed. ing.

In each character 30, a vertical line extending toward the center of the hoist knob 9 is formed by a slit hole 31 penetrating the hoist knob 9. For example, in the character 30a (in this case, the character "F" shown in FIG. 1), the vertical line formed by the slit hole 31 is thick, and the other lines (in this case, the horizontal line) are thin (see FIG. 2). ). As shown in FIG. 3 showing an AA cross section of this, the horizontal line is formed by a shallow groove 32 carved one step lower than the upper end surface of the winding knob 9. Each character 3 integrally provided on the upper end surface of the hoisting knob 9
Since 0 is formed by combining the slit hole 31 and the shallow groove 32 having a small width, not only is the character 30 prevented from becoming unnecessarily large, but also the winding knob 9 provided with the character 30 is provided. Insufficient strength can be prevented.

The slit holes 31 are provided at a larger interval than the gear train on the outer periphery of the hoisting knob 9 which constitutes the conventional reverse rotation preventing structure, and are provided at unequal intervals so that the characters 30 can be recognized. Therefore, two reverse rotation preventing claws 35 and 36 elastically engaged with the slit holes 31 are respectively provided on the front cover 13 and the rear cover 18 so as to shift the phase to a position not to be rotated with respect to the axis of the winding knob 9. It is provided shifted. As a result, one of the reverse rotation preventing claws 35 and 36 is engaged with the slit hole 31, and the reverse rotation (rotation in the direction opposite to the winding direction) of the winding knob 9 is prevented at short intervals. The reverse rotation preventing claws 35 and 36 are elastically deformed to allow the rotation when the winding knob 9 is rotated in the film winding direction.

The reversing prevention claw 35 is integrally formed on the upper surface wall of the front cover 13 and has an elastic arm portion 40 extending toward the rear cover 17 behind the release button 7 and an arm portion 4.
0 and a claw portion 41 provided downward at the tip. The reversing prevention claw 36 has an elastic arm portion 42 extending toward the front surface of the front cover 17 integrally with the upper surface wall of the rear cover 18.
And a claw 43 provided downward at the tip of the arm 42.

The pawl portions 41 and 43 are provided so as to float from the upper surface of the hoisting knob 9, and the reverse rotation preventing claws 35 and 36 are hooked on the hoisting knob 9 in the process of assembling the front cover 13 and the rear cover 14. Can be prevented. Front cover 1
3, the rear cover 18 is provided with claw holders 45, 46 for respectively lifting the claw portions 41, 43 toward the knob 9 and engaging with the slit holes 31 when the both are assembled to the main body base portion 14. It is provided integrally.

When the front cover 13 and the rear cover 18 are assembled in a horizontal direction, the claw holder 45 abuts on the inclined surface 40a of the arm 40 as shown in FIG. Let it. The reverse rotation preventing claw 35 is urged toward the upper surface of the winding knob 9 so that the claw portion 41 is engaged with the slit hole 31. When the winding knob 9 is not rotated, the claw portion 41 falls into the slit hole 31 and is pressed against the slit hole 31. When the winding knob 9 is rotated (forward rotation) in the winding direction, the claw portion 41 is moved upward, and the arm portion 40 is elastically deformed as shown by a two-dot chain line. When the winding knob 9 is rotated (reversed) in the winding direction, the claw portion 41 is caught in the slit hole 31 and the force applied to the arm portion 40 is in the longitudinal direction of the arm portion 40. You. In addition, nail presser 4
Since the function of No. 6 and the urging of the winding knob 9 by the reverse rotation preventing claw 36 are the same as those described above, the description is omitted, and only the reference numerals are given.

As described above, the pawl portions 41 and 43 are urged by the upper end surface of the hoisting knob 9 to engage with the slit holes 31. The claw portions 41 and 43 do not engage between the slit holes 31 of the character 30, but the claw portions 41 and 4 are engaged so that one of the claw portions 41 and 43 engages with the slit hole 31.
3 is disposed substantially opposite to the center of the hoisting knob 9.

The photographing with the lens-fitted film unit 1 is performed by rotating the winding knob 9 to wind up the film, capturing a desired subject in the finder, and pressing the release button 14. The photographing is repeated in this manner, and when all the films 22 are stored in the cartridge 20, the photographing ends. The film unit with lens 1 whose photographing has been completed is submitted to a developing laboratory as it is. The label 3 is torn at the lab and the bottom cover 18
is opened, and the cartridge 20 containing the film 22 is taken out.

In the film unit 1 with a lens,
Since the characters 30 representing the name of the manufacturer or the sales company are provided integrally on the upper end surface of the hoisting knob 9 that is always partially exposed from the opening 25 of the rear cover 18, if the product is reused as it is, You can see at a glance that the name of the selling company is different. Therefore, it is conceivable that the character 30 is deleted, the unit main body 2 is diverted as it is, and a new film cartridge is loaded and sold.

However, if the character 30 is scraped off,
If the unit main body 2 is to be reused after filling, the slit holes 31 engaging with the reverse rotation preventing claws 34 and 35 do not have a regular shape. Cannot be prevented from reversing. Therefore, there is no danger that the unit main body 2 may be used as it is and a new film cartridge is loaded and sold.

In the above embodiment, the concave character is integrally formed. However, a reverse character may be engaged with a convex character and a portion protruding from the upper surface of the winding knob. Further, instead of the tooth row provided around the side surface of the winding knob in addition to the upper end face of the winding knob, the tooth row may be provided or together with the tooth row. As described above, the case where the characters are provided on the hoisting knob has been described. However, instead of the characters, a mark indicating the name of a manufacturer or a selling company may be integrally formed.

[0030]

As described above, according to the film unit with the lens of the present invention, a mark or a character is integrally formed on at least one of the upper surface and the side surface of the winding knob exposed outside the unit main body. Since the reverse rotation prevention claw is engaged with the character, if the mark or character is deleted in order to reuse the unit body irregularly, the reverse rotation of the winding knob cannot be prevented. Resale due to refilling can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the periphery of a hoist knob which is a main part of the present invention.

FIG. 2 is a front view of one character integrally formed with the winding knob.

FIG. 3 is a sectional view of the character shown in FIG. 2;

FIG. 4 is an explanatory view of a state in which a reverse rotation preventing claw is engaged with a slit hole.

FIG. 5 is a perspective view of a film unit with a lens.

FIG. 6 is an exploded perspective view showing a unit main body.

[Explanation of symbols]

 2 Unit main body 9 Winding knob 30 Character 31 Slit hole 35, 36 Reverse rotation preventing claw

Claims (2)

[Claims] 1. A film-with-lens unit in which a film-winding knob for film winding is rotatably incorporated in a unit body in which a photographing mechanism is incorporated and a film is previously loaded, and an upper surface of the winding knob exposed to the outside of the unit body. Alternatively, a film unit with a lens, wherein a mark or a character indicating the name of a manufacturer or a sales company is integrally formed on at least one of the side surfaces. 2. A resilient engagement with a convex or concave part forming the mark or character, and a revolving operation of the winding knob in the film winding direction allows elastic rotation to allow the rotation. 2. The lens-fitted film unit according to claim 1, further comprising a reverse rotation preventing claw that engages with the convex or concave portion to prevent the rotation thereof.