JPH05323517A - Manufacture of film unit with lens - Google Patents

Abstract

PURPOSE:To take pictures on a film in a standardized number or more by lessening the winding length of the film as much as possible wherein the winding is carried out during the inspection process. CONSTITUTION:Lens-attached film units are forwarded after manufacturing processes consisting of assembly processes and inspection processes. In the assembly processes, shutter systems are set to be in charge state and then Patrone-attached films are put in unit main bodies. The inspection processes consist of a first process in which confirmation of shutter system movement is carried out after shutter release is carried out and a second process in which rotary torque of a winding knob is measured by winding operation of the winding knob by two perforations to make the shutter system in the charge state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a lens-fitted film unit having a photographic film previously built therein.

[0002]

2. Description of the Related Art Conventionally, the international standard (ISO: 1007
-135 with patrone specified in (1979 version)
With a camera using a film, it is possible to take a predetermined number of images (about 1 to 3 frames) depending on the loading method of the film. Because in this standard,
The length from the entrance of the patrone to the tip of the film when the film is pulled out from the patrone is specified for each specified number of sheets, and these lengths are 4 frames longer than the specified number of sheets. There is. Therefore, it is desired that a film unit with a lens (hereinafter, referred to as a "film unit") as disclosed in Japanese Patent Publication No. 32615/1990 can be used to take more than a specified number of images.

The film unit has a body in which a photographing lens, a film winding mechanism, and a shutter mechanism are incorporated, and a 135 film with a cartridge, which is defined in advance by an international standard, is housed in a light-tight manner by a rear cover, and is placed on the front surface. It has a structure with a front cover fixed. The main body part is provided with a film roll chamber and a cartridge chamber on both sides of the taking lens, and an unexposed film pulled out from the cartridge in advance is stored in a roll in the film roll chamber. A cartridge having a winding core to which the end of the film is fixed is arranged in the cartridge chamber. The winding core of this film winding mechanism is engaged with the winding knob of the film winding mechanism, and the exposed film is wound around the winding core in the cartridge by the winding operation of the winding knob performed after the shutter release.

The winding of the film causes the sprocket engaged with the perforations to follow. When the sprocket is driven by one frame (8 perforations), the film winding mechanism locks the winding operation of the winding knob, the shutter mechanism is charged, and the number display plate is advanced by one count. .. As a result, the shutter mechanism release operation is allowed, and after the shutter release is completed, the winding operation lock of the winding knob is released. When the number-of-sheets display plate is stepped up by the specified number, the winding operation of the winding knob is not locked, and all the films are wound around the core of the cartridge. Therefore, when considering a film unit that is capable of shooting more than the specified number of images, first make sure that the winding operation of the winding knob is not locked when the number of images displayed on the number display plate exceeds the specified number. You can leave it.

By the way, such a film unit is provided in order to prevent troubles caused by a film built in advance.
The inspection associated with the built-in film must be performed. This inspection includes checking the operation of the shutter mechanism, checking the operation of the winding knob that winds the film while the film is built in, and measuring the rotation torque of the winding knob required for winding, and the film winding mechanism was in the pre-charge state. After loading the film with a cartridge in the main body, the winding inspection process that measures the rotation torque of the winding knob by performing the winding operation of the winding knob that puts the shutter mechanism in the shutter charge state, and after setting the shutter mechanism in the shutter charge state, The shutter inspection process includes performing shutter release and checking the operation of the shutter mechanism.

[0006]

However, if such a manufacturing process is performed, the film is not transferred in the winding inspection process.
Since the frame is wound up and the shutter is released in the shutter inspection step, the film is wound up by at least one frame to two frames (8 to 16 perforations), and this portion cannot be used as a shooting frame.

In order to solve the above problems, the present invention provides
It is an object of the present invention to provide a method for manufacturing a lens-fitted film unit in which the film winding performed in the inspection process is minimized and the film is photographed in a predetermined number or more.

[0008]

In order to achieve the above object, the invention according to claim 1 is an assembling method for loading a film to the unit after the shutter mechanism is charged to the unit. Further, in the invention according to claim 2, after the film is loaded into the unit in which the film winding mechanism is in the charged state, the shutter release is performed to check the operation of the shutter mechanism, and the shutter mechanism is charged. The second inspection step of measuring the rotational torque of the winding knob by performing the winding operation of the winding knob for a predetermined perforation in the range of 1 to 7 perforations of the film.

According to the third aspect of the invention, the film winding amount for 1 to 7 perforations is set to be less than the film winding amount required to bring the shutter mechanism into the charged state. In the invention according to claim 4, the film winding amount is set to 2 perforations. Further, in the invention of claim 5,
The film has a length specified by ISO.

Furthermore, in the invention according to claim 6, from the first step of confirming the operation of the shutter mechanism provided in the unit, and the second step of loading the film into the unit after the first step. Configured.

[0011]

2 to 6 showing the appearance of a lens-fitted film unit 9, a unit body 11 covered with an outer case 10 comprises a body portion 12, a front cover 13 and a rear cover 14, and the body portion 12 Is composed of a main body base portion 26 and a mechanical unit 27. The unit body 11 is provided with a taking lens 15, a finder window 16, a release button 17, a film winding knob 18, and a display window 19, and these operations can be performed through a hole formed in the outer case 10.

The exposure frame 2 is provided on the back side of the main body base 26.
8 is provided, and a film roll chamber 23 and a cartridge chamber 24 are provided on both sides of the exposure frame 28. The exposure frame 28 is provided in the cartridge chamber 24, and its interval, that is, the length from the entrance 22b of the cartridge 22 loaded in the cartridge chamber 24 to the edge 28a of the exposure frame 28 is approximately 3 to 5 of the film. It is the same as the perforation, preferably 4 perforations. In addition, the driven sprocket 3 described later in detail
8 reigns through the opening 29 provided on the upper portion of the exposure frame 28,
Through this opening 29, the perforation 21a of the film 21 is engaged.

The film 20 with a cartridge is composed of a film roll chamber 23, which is a film roll 22 for storing a film 21 having a width of 35 mm in a light-shielded state at the time of assembling, and a roll-shaped film 21 pulled out from the film roll chamber 23. And the cartridge chamber 24, respectively.
When loading the film, the film cartridge 22 to the film 21
Pre-winding work is performed to bring out the. The prewinding work is performed by the loading jigs 60 and 61 shown in FIG.
Can be done using. That is, the drawn film 21 is wound around the winding shaft 61 by the rotation of the winding shaft 61 sandwiching the leading end of the film 21 and the driven shaft 60 engaging with the shaft core 22a of the cartridge 22 in the film drawing direction. It is made into a film roll.

The rear cover 14 is provided with pull-top type lids 14a and 14b for covering the bottom surfaces of the cartridge chamber 24 and the film roll chamber 23, respectively, on its bottom surface. With the lids 14a and 14b open, the body base 26
The film with a cartridge is attached to the 20
The loading jigs 60 and 61 can be easily pulled out.

A winding knob 18 provided with a fork 18a which engages with the winding core 22a of the cartridge 22 is disposed above the cartridge chamber 24. Winding knob 1
The reference numeral 8 rotates the winding core 22a in a direction in which the photographed film 21 is wound into the cartridge 22 by rotating in the direction of the arrow in the drawing. The winding knob 1
A tooth row 18a is formed on the outer periphery of 8, and a check claw 25 made of a leaf spring is engaged with the tooth row 18a. The check claw 25 is for preventing the winding knob 18 from rotating in a direction opposite to the winding direction.

The mechanical unit 27 includes a number display plate 30,
A film winding mechanism including a locking lever 32, a shutter driving lever 34, a shutter blade 47, a driven sprocket 38, and the like, and a shutter mechanism are provided. In FIG. 5 showing the details of such a mechanism, the shutter button 1
Reference numeral 7 is integrally formed on the upper surface of the front cover 13 with a part thereof being cut out, and is moved in the direction of arrow A in FIG. 5 by the shutter release operation. A rod 39 extending rearward is planted under the shutter button 17. In addition,
After the shutter-raise operation is completed, the shutter button 17
It returns to its original position due to its elasticity.

The locking lever 32 is rotatable about a shaft 40, and is biased in the clockwise direction by a spring 42 whose one end 42a is locked to the bent piece 32a. The bent piece 32a is in contact with the rod 39. Further, the shutter drive lever 34 is rotatable about a shaft 45, and one end 42b of the spring 42 is hooked on the spring receiver 34a and is biased to the left.

As is well known, the film 21 is provided with perforations 21a, and the eight perforations 21a correspond to the length of one frame of the film.
The driven sprocket 38 has eight teeth on the outer periphery,
When the film is wound up by the winding knob 18 for one frame, the film is rotated once. Coaxial with this driven sprocket 38,
A cam 44 having a notch 44a formed on the outer periphery, and a cam 52
Are integrally provided, and are driven by the rotation of the driven sprocket 38. The pawl 32c of the locking lever 32 is in contact with the outer periphery of the cam 44, and the pawl 34c of the shutter drive lever 34 is in contact with the outer periphery of the cam 52.

The shutter drive lever 34 is rotated clockwise by one rotation of the cam 44, the protruding rod 34d of the shutter drive lever 34 is engaged with the protrusion 32d of the locking lever 32, and the locking lever 32 is rotated.
The claw 32c engages with the notch 44a of the cam 44 to lock the winding operation of the winding knob 18. This brings the shutter mechanism to the charge position.

When the shutter button 17 is pushed down, the locking lever 32 is rotated counterclockwise by the rod 39.
At this time, the projection 32d is disengaged from the bent piece 34b, the bent piece 34b of the shutter drive lever 34 kicks the claw 47c of the shutter blade 47, and the shutter blade 47 is rotated in the clockwise direction about the shaft 47a to rotate in the right direction. To release.
Then, the bent piece 34b moves over the claw 47c, whereby the shutter blade 47 is pulled back by the spring 48,
The photographing opening 49 is blocked again. The shutter blade 47
The shutter cover 5 corresponding to the photographing opening 49 is provided on the front side of the
The taking lens 15 is arranged at a position of 0.

After the shutter release is completed, the shutter driving lever 34 has its claw 34c in contact with the notch 52a of the cam 52, and the locking lever 32 has the projection 32d.
The bent piece 34b intervenes in the groove adjacent to, that is, the claw 32c is separated from the outer periphery of the cam 44.
The cams 44 and 52 rotate together with the driven sprocket 38 in the next winding operation, so that the rotation of the cam 52 moves the shutter drive lever 34 in the clockwise direction.
Further, the locking lever 32 moves to the right by the bias of the spring 42. As a result, the locking lever 32 and the shutter drive lever 34 are returned to the charge position described above.

The locking lever 32 has a winding knob 1
8 is provided with a claw 32b for engaging with a tooth row portion 18a formed on the outer periphery of the gear 8 and for preventing a winding operation of the winding knob 18 in the charging position. Note that the claw 32b is provided on the winding knob 18 after the shutter release is completed.
Since it retracts from the tooth row 18a formed on the outer periphery of the, the winding and turning operation of the winding knob 18 is allowed.

The driven sprocket 38 is further coaxially provided with a one-tooth gear 54. The one-tooth gear 54 meshes with a tooth row 30 a formed on the outer periphery of the number display plate 30. Therefore, when the driven sprocket 38 makes one revolution, the one-tooth gear 54 also makes one revolution, thereby rotating the number display plate 30 by one scale. On the upper surface of the number display plate 30, there is provided a number display scale corresponding to the rotation pitch and the number of films is equal to or more than the specified number. Since this scale is the number of films that can be photographed at that time, that is, the remaining number display scale, this display scale is used for the display window 19 formed on the front cover 13.
By observing through (see FIG. 2), the number of frames of the film that can be photographed can be confirmed.

A claw 57 is integrally provided on the lower surface of the number display plate 30. The claw 57 abuts on the rising piece 32e of the locking lever 32 during the winding operation after the last frame of the film 21 has been photographed, and the claw 32c is formed.
The locking lever 32 so that it will not fit into the notch 44a.
Prevent the rotation of. At the same time, the toothless portion 30b of the number display plate 30 moves to the meshing position with the one-tooth gear 54. When the locking lever 32 is in such a state, the driven sprocket 38 becomes free, and moreover, even if the one-tooth gear 54 rotates, the number display plate 30 does not rotate. Therefore, the winding knob 18 is rotated in this state. Even if it doesn't stop,
The entire film 21 can be wound in the cartridge.

Assembly of the lens-fitted film unit having the above structure will be described with reference to FIG. First, after assembling the mechanical unit 27, the driven sprocket 38 is rotated in the film winding direction to put the shutter mechanism into a charged state. The mechanical unit 27 with the shutter mechanism in the charged state is attached to the main body base 26 to complete the main body 12. On the front surface of the main body 12,
The front cover 13 is attached. Note that the shutter mechanism of the mechanical unit may be charged after the mechanical unit 27 is attached to the main body base 26.

Thereafter, as shown in FIG. 6, the roll portion of the film 21 wound around the winding shaft 61 in a roll shape and the shaft core 22.
a is a cartridge 22 which is engaged with the driven shaft 60 and a film roll chamber 23 and a cartridge chamber 24 of the main body 12, respectively.
And load. After that, the rear cover 14 is attached to the main body 12, the loading jigs 60 and 61 are pulled out, and then the lid 1
4a and 14b are closed, and the unit main body 11 in which the cartridge chamber 24 and the film roll chamber 23 are sealed is completed.

In the state of the unit main body 11, as shown in FIG. 7A, the driven sprocket 38 is engaged with the perforation 21a through the opening 29, and the exposure frame 28 is loaded in the cartridge chamber 24. Patrone 22
Is located at a position separated from the entrance 22b by four perforations. Further, the edge number “E” pre-baked on the film 21 and the cartridge 22
The distance "L" from the entrance 22a of the
The intervals are 16 pieces of 1a.

The completed unit body 11 is transported to the inspection process. In the inspection process, first, the shutter button 1
7 is pressed to perform shutter release, and shutter blade 4
Check the operation of 7 etc. In the case of a lens-fitted film unit with a strobe, a strobe light emission test is also performed at this time. By confirming the operation of the shutter blades 47 and the like, the film 21 shown in FIG. 7A is exposed in the range “C” corresponding to the aperture 28. Then, the winding knob 18 is operated in the winding direction to measure the rotation torque of the winding knob 18. Since the operation of the winding knob 18 at this time is performed only for two perforations of the film 21, the exposure range “C” is shown in FIG.
The product is shipped in the position shown in (B). by the way,
After shipping, it may be stored under extreme temperature conditions (eg, on the summer car dashboard), but the shipping conditions require the shutter mechanism to be charged. Since the film winding amount is less than the film winding amount, it is possible to prevent a stress from being generated between the plastic parts (the shutter drive lever 34 and the like) and the metal parts (for example, the spring 42) or the plastic parts and to deform them.

When the user first operates the winding knob 18 for taking a picture, the shutter mechanism is charged by winding the film 21 by 6 perforations, and the range D shown in FIG. 7B is the first operation. It becomes the exposure range. The exposure range "D" is a screen in which the edge number "E" is previously burned on the shoulder of the perforation 21a located at the center of the screen. Therefore, in the film 21 after development, since the exposure is performed so that the positional relationship between the photographing screen and the frame number is surely corresponded to, it is possible to prevent troubles such as mistakenly designated frame when reprinting, and to easily designate the designated frame. There is an advantage that can be searched for.

In the above-described embodiment, the winding torque of the winding knob is measured by performing the winding operation of the winding knob for charging the shutter mechanism for two perforations of the film, but the present invention is not limited to this. Instead, the winding operation of the winding knob may be less than the film winding amount required to bring the shutter mechanism into the charged state, that is, a predetermined perforation in the range of 1 to 7 perforations.

Further, in the above embodiment, the first step of putting the shutter mechanism provided in the unit into the charged state,
After this first step, a second step of loading the film into the unit, a first inspection step of performing shutter release to check the operation of the shutter mechanism, and a winding operation of a winding knob for putting the shutter mechanism into a charged state are performed. Of 1
~ 7 perforations Perform a predetermined perforation range to measure the rotation torque of the winding knob
Although it is composed of an inspection step, the present invention is not limited to this, and a first step of checking the operation of the shutter mechanism after assembling the mechanical unit 27 and a film is loaded into the unit after the first step. It comprises a second step and a second inspection step in which the winding operation of the winding knob for charging the shutter mechanism is performed for a predetermined perforation in the range of 1 to 7 perforations of the film to measure the rotation torque of the winding knob. Good.

[0032]

As described above in detail, according to the present invention, after the film is loaded into the unit in which the film winding mechanism is in the charged state, the shutter release is performed to confirm the operation of the shutter mechanism. Since the inspection process consists of one process and the second process of performing the winding operation of the winding knob for charging the shutter mechanism for two perforations of the film to measure the rotation torque of the winding knob, the inspection process is performed. It is possible to minimize the film winding, and it is possible to shoot more than the specified number.

[Brief description of drawings]

FIG. 1 is a flowchart showing a main part of a method of manufacturing a lens-fitted film unit of the present invention.

FIG. 2 is a perspective view showing an 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 section.

FIG. 5 is an exploded perspective view showing the outline of a shutter mechanism and a winding mechanism.

FIG. 6 is a perspective view showing a state in which a film with a cartridge is loaded on the main body.

FIG. 7 is an explanatory view showing a state of a film with a cartridge incorporated in the unit main body, (A) showing a state before the inspection, and (B) showing a state after the inspection.

[Explanation of symbols]

 11 unit main body 14 rear cover 20 film with patrone 26 main body base 27 mechanical unit

Claims (6)

[Claims] 1. A lens-fitted film unit in which a sprocket engaged with a perforation of the film is driven by a winding operation of a winding knob performed after shutter release, and the shutter mechanism is charged through the film winding mechanism. 5. The lens-equipped film unit according to claim 1, further comprising a first step of bringing a shutter mechanism provided in the unit into a charged state and a second step of loading a film into the unit after the first step. Manufacturing method. 2. After the second step, a first inspection step of performing shutter release to confirm the operation of the shutter mechanism, and a winding operation of a winding knob for putting the shutter mechanism in a charged state are performed in a range of 1 to 7 perforations of the film. 2. The method for producing a lens-fitted film unit according to claim 1, further comprising a second inspection step of measuring the rotational torque of the winding knob by performing the predetermined perforation. 3. The method of manufacturing a lens-fitted film unit according to claim 2, wherein the film winding amount for 1 to 7 perforations is less than the film winding amount required to bring the shutter mechanism into a charged state. 4. The method of manufacturing a film unit with a lens according to claim 3, wherein the film winding amount is set to 2 perforations. 5. The method of manufacturing a lens-fitted film unit according to claim 1, wherein the film has a length specified by ISO. 6. A lens-fitted film unit in which a sprocket engaged with a perforation of a film is driven by a winding operation of a winding knob performed after shutter release, and the shutter mechanism is charged through a film winding mechanism. The method for manufacturing a lens-equipped film unit according to claim 1, comprising a first step of confirming the operation of the shutter mechanism provided in the unit, and a second step of loading the film into the unit after the first step. Manufacturing method.