JPH0713279A - Inspection device for film unit provided with lens - Google Patents

Abstract

PURPOSE:To reduce an operation for taking out a photographic film from parts rejected by a functional test. CONSTITUTION:As to this film unit provided with a lens; a shutter charge mechanism, a film winding stopping mechanism, and a counter mechanism making a photographed film frame number displaying board take a step forward, etc., incorporated in a mechanical unit 25 are linked by rotating a follower sprocket 33 engaged to the perforation of the photographic film. As to the photographic number displaying board incorporated at a film end position; a member for preventing the actuation of the shutter charge mechanism and the film winding stopping mechanism is provided in order to idly feed a film in a range from a film end position to this side of an initial position. The inspection device for inspecting film idly feeding and the shutter charge mechanism performs inspection before the photographic film is loaded. The device is provided with a driving bear 63, and photoelectric sensors 60 and 61, etc. The driving gear 63 is meshed with the follower sprocket 33, and rotates the sprocket 33 till the photographed film frame number displaying board displays the initial position. The photoelectric sensors 60 and 61 detect a mark formed on the surface of the photographed film frame number displaying board so as to inspect the initial position of the photographed film frame number displaying board.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inspecting a film unit with a lens, which incorporates a photographic film in advance and a photographing lens and a shutter mechanism.

[0002]

[Prior Art] "Sharp Run High", "Snap Run Flash", "Snap Run Panorama" (Both are product names)
The lens-fitted film unit such as is generally used because it is possible to take a picture immediately on the spot when it is purchased, and it is easy to take it to a store dealing with development after shooting. At the photo lab, take the photographed film from the film unit with lens and develop the film.
The printing process is performed, and the print photograph and the negative film are returned to the user. From such a usage pattern, the lens-fitted film unit is required to have a low cost, and in order to meet this, mass production by automatic assembly is performed.

The lens-fitted film unit is provided in a form in which a photographic film with a cartridge is built in and a surface of a unit main body equipped with a shutter and other main photographing mechanism is covered with a paper box for makeup. The main body of the unit is a main body part that integrally forms a cartridge room and a film roll room for accommodating a cartridge and a photo film roll on both sides of the exposure frame, and a mechanical unit that can be detachably attached to the front surface of the main body part. It consists of a front cover that covers the front and a rear cover that covers the back of the main body and stores the film with a cartridge in a light-tight manner.

In the mechanical unit, in addition to the shutter mechanism,
A film winding stopping mechanism, a counter mechanism and the like are provided. As is well known, the shutter mechanism charges the shutter by setting the shutter to the charge position by a sprocket that rotates following the photographic film transferred by the film winding operation. Further, the film winding stopping mechanism locks the film feeding when the sprocket makes one revolution. Further, the counter mechanism advances the photographed number display plate by one tooth in association with the rotation of the sprocket, and displays the current remaining number of photographed images in the counter window.

After all the photo films have been exposed, the film winding mechanism is not locked, and the winding operation is continued. When all the photo films are stored in the cartridge, the winding operation is performed in an idling manner. Becomes Moreover, since the rotation of the sprocket is stopped, the sprocket is stopped in a state in which the number-of-photos display plate displays the "E" mark indicating the end from the counter window.

By the way, after assembling the above-mentioned film unit with lens, it is necessary to perform a functional inspection of the shutter mechanism, idle feed and the like. These tests were done after loading the photographic film.

[0007]

However, when the function inspection process is unsuccessful, it is necessary to discriminate whether the assembly is defective or the defective parts and to repair the defective portion. In particular, if a defective portion occurs in a mechanical unit having an exposure function such as a shutter mechanism, simply removing the mechanical unit from the main body exposes the photographic film exposed in the exposure frame. It involves removing the film from the main body. This film removal work has to be carried out in a dark room so as not to expose the entire photographic film. Therefore, it takes a lot of time to perform the repair work, and there is a drawback that workability is poor.

The present invention has been conceived in order to solve the above problems, and inspects a lens-fitted photo film unit capable of easily and quickly reworking a component that has failed a functional inspection. The purpose is to provide a method.

[0009]

In order to achieve the above object, in the present invention, the sprocket is meshed with the sprocket, and the sprocket is rotated until the number display plate is in the initial position, so that the film is idled and the shutter charge of the shutter charge mechanism is performed. And a mark detecting means for detecting the mark formed on the surface of the number display plate after completion of the rotation of the sprocket driving means and performing an initial position inspection of the number display plate. Be prepared.

[0010]

The function of displaying the number of sheets is incorporated at the film end position during assembly. Then, when the number display plate is located between the film end and the position just before the initial position, the shutter charging of the shutter mechanism is blocked by the blocking means. For this reason, when the sprocket is rotated by the sprocket driving means, the number display plate rotates until it reaches the initial position, and it is possible to inspect the film idling. When the number display plate reaches the initial position, the shutter mechanism charges the shutter, so that the shutter charge can be inspected. At this time, the mark position detecting means performs the initial position inspection of the number display plate. As a result, before the film is loaded, the film can be preliminarily fed, shutter charged, and inspected with the initial position of the number display plate.

In FIG. 2, the lens-fitted film unit 9 is composed of a unit body 10 and an outer case 11 covering the unit body 10. Outside the unit body 10, there are a taking lens 15, a finder window 16, a release button 17,
A film winding knob 18, a counter display window 19 and the like are provided, and these operations can be performed through holes formed in the outer case 11.

As shown in FIG. 3, the unit main body 10 includes a main body 21 on the rear side of which a photo film 20 with a cartridge is loaded, a front cover 22 covering the front of the main body 21, and a main body 21. And a rear cover 23 for accommodating the photo film 20 with a cartridge in a light-tight manner.

As shown in FIG. 4, the main body portion 21 is composed of a main body base portion 24 and a mechanical unit 25. The main body base 24 has an exposure chamber 26 in the center and an exposure chamber 26.
A film chamber 27 and a cartridge chamber 28 are integrally formed so as to sandwich the film. At the top of the exposure chamber 26,
The driven sprocket, which will be described in detail later, is shown in the photo film 20.
An opening 29 is provided for engaging the perforation 20b of a.

A winding knob 18 is arranged above the cartridge chamber 28. The winding knob 18 is provided with a fork protruding into the cartridge chamber 28.
This fork is engaged with the core of the cartridge 20c. By performing the winding operation of rotating the winding knob 18 in the direction of the arrow in the figure, the exposed photographic film 20a is stored in the cartridge 20c.

A tooth row 18a is formed on the outer circumference of the winding knob 18. A check claw 30 made of a leaf spring is engaged with the tooth row 18a. The check claw 30 prevents the winding knob 18 from rotating in a direction opposite to the winding direction.

The mechanical unit 25, as shown in FIG.
Driven sprocket 33 and shutter 3 of the mechanical base 32
4, a photographed number display plate 35, a shutter charge mechanism, a counter mechanism, a film winding mechanism, and the like are incorporated.

An exposure opening 37 is formed in the center of the front surface of the mechanical base 32. A stopper 38 having a stepped surface is provided on the right side of the exposure opening 37. The stopper 38 abuts on a shutter blade 34 which is rotated counterclockwise by a spring 39, and the stopper 38 is brought into contact with the shutter blade 34. Stop at the position where it is shielded. The shutter blade 34 is made of light-shielding plastic and has a claw portion 34a that is kicked by a kicking arm 45a described later.
Is covered with a shutter cover 40.

On the upper part of the mechanical base 32, shafts 42 and 43 are provided.
And a bearing 44 is formed. On the shaft 42, the number-of-photos display plate 8, the kicking arm 45a and the cam arm 4 are provided.
5b is formed on the shutter drive lever 45, and the shaft 4
Locking levers 47, which are urged in the clockwise direction by springs 46, are fitted into the respective parts 3.

A driven shaft 48 is inserted through the bearing 44. The driven shaft 48 has a sprocket engaging portion 48a,
A shutter set cam 48b, a shutter charge lock cam 48c, and one tooth portion 48d are provided.
The driven sprocket 33 is attached to the sprocket engaging portion 48a.
Are engaged. The driven sprocket 33 is provided with eight teeth corresponding to the number of perforations 20b for one frame of the photographic film.
Rotates following a.

When the operation of winding the one-frame film is performed, the driven sprocket 33 rotates following the transferred photographic film 20a. Due to this rotation, the driven shaft 48 rotates counterclockwise, the shutter set cam 48b presses the cam arm 45b engaged therewith, the shutter drive lever 45 is charged to the charging position, and the driven sprocket 33 is moved. After the rotation, the cam 48c locks the lock claw 47a of the locking lever 47 engaged with the cam 48c to prevent the film transfer. At this time, in the shutter drive lever 45, the protruding piece 45 c of the shutter drive lever 45 is engaged with the holding claw 47 b of the locking lever 47 and is held by the locking lever 47. The one tooth portion 48d rotates the number-of-photographed image display plate 35 by one scale. Further, the winding stopping claw 47c of the shutter driving lever 47 meshes with the tooth row 18a of the winding knob 18 to stop the film winding.

By pressing the shutter button 17, the pressing piece 47d of the locking lever 47 is pressed. As a result, the engagement between the protruding piece 45c and the holding claw 47b is released,
The biasing force of the spring 46 causes the locking lever 47 to rotate in the clockwise direction, and the shutter drive lever 45 to rotate in the counterclockwise direction to kick the claw portion 34a by the kicking arm 45a. The shutter blade 34 oscillates once around the shaft 34a to perform exposure.

After the shutter release is completed, the engagement between the cam 48c and the lock claw 47a is released, and the winding stop claw 3 is released.
Since the mesh between 2b and the tooth row 18a is released, the film winding operation of the winding knob 18 is allowed. Since the driven shaft 48 rotates together with the driven sprocket 33 by the next winding operation, the shutter drive lever 45 is moved to the charge position by the rotation of the shutter set cam 48b.

As shown in FIG. 6, on the upper surface of the number-of-photographed image display plate 35, there is provided a number-of-images display scale 50 corresponding to the rotation pitch of the film, the number of which is equal to or more than the specified number of films. Since the scale 50 is from "S" indicating the initial position to "E" indicating the film end sandwiching the number string, it is the scale of the number of photographic films that can be photographed at that time, that is, the remaining number display scale. By observing this scale through the counter window 19 (see FIG. 3) formed on the front cover 22, the number of frames of the photographic film that can be taken can be confirmed. At the time of assembly, the counter window 19 is assembled at the position where the "E" scale 50 is displayed.

A counter window 19 is provided inside the scale 50.
Two marks 51 and 52 for initial position detection are provided so as not to be exposed. These marks 5
1, 52 are formed in a rectangular shape, and are provided at point symmetrical positions about the rotation shaft 42. These marks 5
The reference numerals 1 and 52 are formed in a relief shape by die molding like the scale 50, and white paint is applied to the upper surface thereof to improve the visibility of the scale and the like. Then, when the "S" scale 50 is displayed on the counter window 19, it is detected by the reflective photoelectric sensors 60 and 61 described in detail later.

On the lower surface of the number-of-photographs display plate 35, a blocking wall 54 for blocking film winding and shutter charging is provided in order to feed the film after the last frame is photographed.
Are integrally formed. On the blocking wall 54, when a portion of the scale 50 displayed on the counter window 19 from "E" to a position one pitch before the scale "S" is displayed with an arrow interposed between the scale 50 and the lock claw 47a. The protrusion 47e (see FIG. 5) formed in the vicinity is engaged, and the lock claw 47a and the cam 4 are engaged.
Rotation of the locking lever 47 is prevented so that the engagement with the 8c and the engagement between the protruding piece 45c and the holding claw 47b are not performed. As a result, the exposed photographic film can be comfortably wound up inside the cartridge 20c. In this embodiment, the rotation pitch between "E" and "S" sandwiching the arrow is 4 pitches, that is, 4 frames of photographic film.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An inspection apparatus for a lens-fitted film unit having the above structure will be described with reference to FIG. The inspection device is arranged in the final step of the assembly line of the mechanical unit 25. In this step, the mechanical unit 25 is positioned in a fixed posture. The structure of the device is a reflection type photoelectric sensor 60 for detecting the marks 51 and 52 at the positions corresponding to the marks 51 and 52 on the number-of-photographed display plate 35 to inspect the initial position of the number-of-photographed display plate 35. 61, a drive gear 63 that meshes with the driven sprocket 35 and rotates it in the film winding direction, a drive gear 63
Motor 64, a driver 65 for controlling the motor 64,
It is composed of a detection unit 66 that detects signals obtained from the photoelectric sensors 60 and 61, and a control unit 67 that totally controls the driver 65 and the detection unit 66.

When the mechanical unit 25 is positioned at a predetermined position, the driven sprocket 63 is in mesh with the drive gear 63. The drive gear 63 has the number of teeth for rotating the driven sprocket 33 four times in one rotation.

The control section 67 first sends a control signal to the driver 65 to rotate the drive gear 63 once to drive the motor 64. This causes the drive gear 63 to rotate the driven sprocket 33 four times. The drive gear 63 is provided with a torque releaser 68. The torque releaser 68 rotationally drives the drive gear 63 with a constant torque, and does not rotationally drive the drive gear 63 when, for example, the operation of the driven sprocket 33 becomes abnormal and the rotation becomes heavy. To do so.

Here, as described above, since the number-of-photographs display plate 35 is in the built-in position in which "E" is displayed on the counter window 19, the driven sprocket 33 idles four revolutions. Here, when the mechanical unit 25 is abnormal and the torque for rotating the driven sprocket 33 is heavy, the drive gear 63 is not rotated by the torque releaser 68, and the photoelectric sensors 60, 61 described later are not turned on.

When the driving of the driving gear 63 is completed, the control unit 67 controls the photoelectric sensors 60, 6 obtained from the detection unit 66.
Take in the signal of 1 ON or OFF. When these two photoelectric sensors 60 and 61 are turned on, it is determined that the shutter charge has been performed and the number-of-photographs display plate 35 has been set to the initial position. Make a judgment and display a warning with a sound or a lamp. If it fails, the operator immediately removes it from the line, checks the defective portion, and performs repair work. This work can be performed quickly because no film or the like is loaded.

The mechanical unit 25 that has passed the inspection is sent to the unit main assembly line with "S" displayed in the counter window 19 and in the shutter-charged state. In this assembly line, the mechanical unit 25 is assembled in the main body base 24, and then the front cover 22 is fitted. Since the driven sprocket 33 is exposed to the back side of the main body base 24 through the opening 29 at this time, the above-described inspection may be performed after the mechanical unit 25 is attached to the main body base 24.

After that, the photo film 20 with a cartridge is loaded in the dark room, and is discharged from the dark room with the rear cover 23 attached. The discharged unit main body 10 is subjected to a shutter release inspection, and is then shipped with the outer case 11 attached.

[0033]

As described above in detail, according to the present invention, the sprocket drive means rotates the sprocket until the number display plate is in the initial position, and the film is fed in the blank and the shutter charge of the shutter charge mechanism is performed. In addition, in order to detect the mark formed on the surface of the number display plate by the display plate initial position detection means and to perform the initial position inspection of the number display plate, inspection such as shutter charge before loading the photographic film. It can be performed. As a result, as described in the prior art, as compared with the case where the photographic film is loaded and then inspected, the work can be simply performed by the amount of taking out the film.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an inspection device for a lens-fitted film unit of the present invention.

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

FIG. 3 is an exploded perspective view showing a unit main body.

FIG. 4 is an exploded perspective view showing a main body portion.

FIG. 5 is an exploded perspective view showing a mechanical unit.

FIG. 6 is a plan view showing the number-of-photographed image display plate in a state where “E” is displayed on the counter window.

FIG. 7 is a plan view showing the number-of-photographed image display plate with “S” displayed on the counter window.

[Explanation of symbols]

 10 unit body 25 mechanical unit 33 driven sprocket 35 number-of-images display plate 48 driven shaft 50 scales 51, 52 marks 61, 62 photoelectric sensor 63 drive gear

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[Procedure amendment]

[Submission date] September 19, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0024

[Correction method] Change

[Correction content]

A counter window 19 is provided inside the scale 50.
Two marks 51 and 52 for initial position detection are provided so as not to be exposed. These marks 5
1, 52 are formed in a rectangular shape, and are provided at point symmetrical positions about the rotation shaft 42. These marks 5
Similar to the scale 50, the units 1 and 52 are formed in a relief shape by die molding, and a white paint is applied to the upper surface thereof to improve the visibility of the scale and the like. Then, when the "S" scale 50 is displayed on the counter window 19, it is detected by the reflective photoelectric sensors 60 and 61 described in detail later. Na
The same position as the marks 51 and 52 on the number-of-photos display plate 35
If a through hole is provided in the
Do you want to detect this with a reflective photoelectric sensor?
Detects the light passing through the through-hole with a transmitted light detection type photoelectric sensor.
You can

Claims (1)

[Claims] 1. A sprocket that engages with a perforation of a photographic film and rotates following a photographic film transferred by a film winding operation, and a shutter charge that returns the shutter to a charging position in association with the rotation of the sprocket. Shutter charge mechanism to perform,
In addition to displaying the remaining number of films from the counter display window, a number display plate that is installed at the film end position during assembly, and a counter mechanism that advances the number display plate by one step in synchronization with the rotation of the sprocket, In a device for inspecting a film unit with a lens provided with a blocking means for blocking shutter charge of the shutter mechanism when the number display plate is located between the film end and the position just before the initial position, it is meshed with the sprocket. , Sprocket drive means for rotating the sprocket until the number display plate reaches the initial position to inspect the film idle feed and the shutter charge of the shutter charge mechanism, and the number of sheets after the sprocket drive means has finished rotating. The mark formed on the surface of the display board is detected, and the initial position inspection of the number display board is performed. Inspection device of the lens-fitted photo film unit being characterized in that a display panel initial position detecting means fit.