JP2880854B2 - Method of manufacturing film unit with lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a film unit with a lens in which a photographic film is built in advance.

[0002]

2. Description of the Related Art Conventionally, international standards (ISO: 1007) have been used.
135 with patrone as specified in 1979 edition)
In a camera using a film, more than a specified number of images (about one to three frames) can be taken depending on the film loading method and the like. Because, in this standard,
The length from the entrance of the patrone to the end of the film when the film is fully pulled out from the patrone is determined for each specified number of sheets, and these lengths are four frames longer than the length for the specified number of sheets. I have. Therefore, it is desired that a film unit with a lens (hereinafter, referred to as a "film unit") disclosed in Japanese Patent Publication No. 2-32615 or the like can capture more than a specified number of images.

In a film unit, a 135 film with a patrone specified in advance by an international standard is housed in a main unit in which a photographic lens, a film winding mechanism and a shutter mechanism are incorporated in a light-tight manner with a rear cover. The front cover is fixed. In the main body, a film roll chamber and a patrone chamber are provided on both sides of the taking lens, and an unexposed film drawn out of the patrone in advance is stored in a roll state in the film roll chamber. In the patrone chamber, a patrone provided with a core to which the end portion of the film is fixed is arranged. The winding core of the patrone is engaged with a winding knob of a film winding mechanism, and the exposed film is wound around the winding core in the patrone by a winding operation of the winding knob performed after the shutter is released.

[0004] When the film is wound, the sprocket engaged with the perforation is driven. When the film of the sprocket is driven by one frame (8 perforations), the film winding mechanism locks the winding operation of the winding knob, sets the shutter mechanism to the charged state, and further advances the number display plate by one count. . Thereby, the release operation of the shutter mechanism is permitted, and after the shutter release is completed, the lock of the winding operation of the winding knob is released. Then, when the number display plate is advanced by the specified number, the film is wound around the core of the patrone without locking the winding operation of the winding knob. Therefore, when considering a film unit that takes more than the specified number of shots, first make sure that the winding operation of the wind-up knob is not locked when the number of followers on the number display plate exceeds the specified number. It should be left.

[0005] By the way, such a film unit is designed to prevent troubles caused by a built-in film.
Inspection must be carried out with the built-in film. This inspection includes checking the operation of a shutter mechanism, etc., checking the operation of a winding knob that winds up a film with a built-in film, and measuring the rotating torque of the winding knob required for winding, and setting the film winding mechanism to a state before charging. After loading the film with the patrone in the main body, the winding mechanism of the winding knob for setting the shutter mechanism to the shutter charging state is operated to measure the rotation torque of the winding knob, and after the shutter mechanism is set to the shutter charging state. And a shutter inspection step of checking the operation of the shutter mechanism by performing a shutter release.

[0006]

However, when such an inspection is performed, the film is removed by one in the winding inspection process.
Since the film is wound up by one frame 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 photographing frame.

[0007] In order to solve the above problems, the present invention provides:
It is an object of the present invention to provide a method of manufacturing a film unit with a lens in which film winding performed in an inspection process is reduced as much as possible and a predetermined number or more of images are photographed on the film.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, after the shutter mechanism provided in the unit is brought into a state two perforations before the charged state, the film is added to the unit. This is an assembling method for loading the. This state may be any state as long as it is before 1 to 7 perforations. Further, according to the second aspect of the present invention, the shutter mechanism is moved from the charged state to the second state.
A first inspection step in which after the film is loaded in the unit in the state before the perforation, the winding operation of the winding knob for setting the shutter mechanism to the charged state is performed for two perforations of the film and the rotation torque of the winding knob is measured; And a second inspection step of checking the operation of the shutter mechanism by performing a shutter release.

According to the third aspect of the present invention, the first aspect is provided.
In the units described in (3) to (3), the distance between the entrance accommodated in the patrone chamber and the end of the aperture provided in the unit is 1 to 3 perforations in film length. Further, in the invention according to claim 4, the film accommodated in the unit according to claims 1 to 3 can be replaced by an I-type film.
The length is standardized to SO. Further, in the invention according to claim 5, after the operation of the shutter mechanism provided in the unit is confirmed, the first step of bringing the shutter mechanism into a state two perforations before the charging state, After the process, a film is loaded into the unit in a second step, and after the second step, a winding operation of the winding knob for charging the shutter mechanism is performed by 1 to 7 perforations of the film, and a rotation torque of the winding knob is measured. And the third step. Still further, in the invention according to claim 6, the above 1 to 1
The film winding amount for seven perforations is less than the film winding amount required to bring the shutter mechanism into the charged state.

[0010]

2 to 6, which show the appearance of a film unit 9 with a lens, a unit main body 11 covered with an outer case 10 comprises a main body 12, a front cover 13 and a rear cover 14. Is composed of a main body 26 and a mechanical unit 27. The unit body 11 is provided with a photographing 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 holes formed in the outer case 10.

The main body base 26 has an exposure frame 2 on its back side.
A film roll chamber 23 and a patrone chamber 24 are provided on both sides of the exposure frame 28. The exposure frame 28 is provided in the patrone chamber 24, and its interval, that is, the length from the entrance 22b of the patrone 22 loaded in the patrone chamber 24 to the edge 28a of the exposure frame 28 is substantially 1 to 3 of the film. The interval is equivalent to perforations, preferably two perforations. In addition, a driven sprocket 38, which will be described in detail later, reigns from an opening 29 provided above the exposure frame 28, and engages with the perforation 21 a of the film 21 through the opening 29.

The film 20 with a patrone includes a patrone 22 for storing a 35 mm wide film 21 in a light-shielded state at the time of assembly thereof, and a film 21 in the form of a roll drawn out from the patrone 22. And the patrone chamber 24.
When the film is loaded, the film 21
Pre-winding work is performed to draw out. The prewinding operation is performed by using the loading jigs 60 and 61 shown in FIG.
Can be performed. That is, the film 21 pulled out 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 engaged with the shaft core 22a of the cartridge 22 in the film drawing direction. It becomes a film roll.

The rear cover 14 is provided at its bottom with pull-top lids 14a and 14b for covering the bottoms of the patrone chamber 24 and the film roll chamber 23, respectively. With these lids 14a and 14b open, the main body base 26
By attaching it to the film with patrone 20
The loading jigs 60 and 61 can be easily pulled out of the apparatus.

A winding knob 18 provided with a fork 18a which engages with a core 22a of the patrone 22 is disposed above the patrone chamber 24. Hoisting knob 1
Numeral 8 rotates the winding core 22a in a direction in which the photographed film 21 is wound up into the cartridge 22 by rotating in the direction of the arrow in the figure. In addition, hoisting knob 1
A tooth row 18a is formed on the outer circumference of the gear 8, and a check pawl 25 made of a leaf spring is engaged with the tooth row 18a. The check claw 25 is for preventing rotation of the winding knob 18 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 details of such a mechanism, a shutter button 1
Reference numeral 7 is integrally formed with a part of the upper surface of the front cover 13 cut out, and moves in the direction of arrow A in FIG. 5 by a shutter release operation. A rod 39 extending rearward is implanted below the shutter button 17. In addition,
After the shutter release operation is completed, the shutter button 17
It returns to its original position due to its own elasticity.

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

As is well known, the film 21 is provided with a perforation 21a, and eight perforations 21a correspond to the length of one frame of the film.
The driven sprocket 38 has eight teeth on its outer periphery,
The film is rotated once by the winding operation of the winding knob 18 for one frame of the film. The driven sprocket 38 is provided with a notch 38a (see FIG. 8) as a mark for setting the shutter mechanism to a state two perforations before the charged state.

Coaxially with the driven sprocket 38, a cam 44 having a notch 44a formed on the outer periphery and a cam 52 are provided integrally, and are driven by the rotation of the driven sprocket 38. The cam 44 has a claw 32 of the locking lever 32 on its outer periphery.
c abuts, and the claw 34c of the shutter drive lever 34 abuts on the outer periphery of the cam 52. By one rotation of the cam 44, the shutter drive lever 34 is rotated clockwise, the protruding rod 34d engages with the projection 32d of the locking lever 32, and the locking lever 32 After entering the notch 44a, a claw 32b, which will be described in detail later, engages with a tooth row 18a formed on the outer periphery of the winding knob 18 to lock the winding operation of the winding knob 18. As a result, the shutter mechanism is in the state of the charging position.

When the shutter button 17 is depressed, the locking lever 32 is rotated leftward 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 clockwise about the shaft 47a to open the photographing opening. Release 49. Thereafter, the shutter blade 47 is pulled back by the spring 48 as the bent piece 34b gets over the claw 47c, and again shields the photographing opening 49. The photographing lens 15 is arranged on the front surface of the shutter blade 47 at a position of the shutter cover 50 corresponding to the photographing opening 49.

After the shutter release is completed, the claw 34c of the shutter drive lever 34 is brought into contact with the notch 52a of the cam 52, and the locking lever 32 is
, The bent piece 34b is interposed in the groove adjacent to the cam 44, that is, the claw 32c is separated from the outer periphery of the cam 44.
Since the cams 44 and 52 rotate together with the driven sprocket 38 by the next winding operation, the rotation of the cam 52 causes the shutter drive lever 34 to move clockwise,
Further, the locking lever 32 moves in the clockwise direction by the bias of the spring 42. As a result, the locking lever 32 and the shutter drive lever 34 return to the above-described charge position.

The locking lever 32 has a winding knob 1
A winding claw 32b is provided which engages with the tooth row portion 18a formed on the outer periphery of the winding 8 and prevents the winding operation of the winding knob 18 in the charged position state. After the shutter release is completed, the hook 32b
Is retracted from the tooth row 18a formed on the outer periphery of the winding knob 18, so that the winding knob 18 can be turned up.

The driven sprocket 38 is further provided with a one-tooth gear 54 coaxially. 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 rotation, the one-tooth gear 54 also makes one rotation, and rotates the number display plate 30 by one division. On the upper surface of the number display plate 30, a number display scale is provided corresponding to the rotation pitch, the number of which is equal to or more than the specified number of films. Since this scale is a scale for displaying the number of films that can be photographed at that time, that is, the remaining number, this scale is displayed on the display window 19 formed in 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 comes into contact with the rising piece 32e of the locking lever 32 during the winding operation after the photographing of the last frame of the film 21 is completed, and the claw 32c
Lock lever 32 so as not to fit into notch 44a.
Block the rotation of At the same time, the missing tooth portion 30b of the number display plate 30 moves to a position where it meshes with the one-tooth gear 54. When the locking lever 32 is in such a state, the driven sprocket 38 becomes free, and even if the one-tooth gear 54 rotates, the sheet number display plate 30 does not rotate. Even if it is not stopped,
All of the film 21 can be rolled into the patrone.

The assembling of the film unit with the lens having the above configuration 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 bring the shutter mechanism from the charged state to a state immediately before the two perforations. This state can be easily performed by using the notch 38a of the driven sprocket 38 as a mark. And
The mechanical unit 27 is attached to the main body base 26 and the main body 12
Is completed. A front cover 13 is provided on the front surface of the main body 12.
Is attached. After attaching the mechanical unit 27 to the main body base 26, the shutter mechanism of the mechanical unit 27 may be brought into a state two perforations before the charged state.

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

As shown in FIG. 7A, the state of the film 21 housed in the unit main body 11 is such that the driven sprocket 38 is
The exposure frame 28 is disposed at a position spaced from the entrance 22b of the patrone 22 loaded in the patrone chamber 24 by two perforations. Further, the interval "L" between the edge number "E" pre-burned in the film 21 and the entrance 22a of the cartridge 22 is 16 perforations 21a.

The completed unit body 11 is transported to an inspection process. In the inspection process, first, the winding knob 18
Is operated in the winding direction to measure the rotation torque of the winding knob 18. The operation of the hoist knob 18 at this time is as follows.
Since the operation is performed for two perforations of the film 21, the shutter mechanism is charged and the film 21 is in a state as shown in FIG. 7B. Thereafter, the shutter button 17 is pressed to release the shutter, and the operation of the shutter blades 47 and the like is checked. At this time, the film 2 shown in FIG.
Exposure is performed in a range “C” corresponding to 8. Thereafter, it is shipped in a state as shown in FIG. By the way, after being shipped, there is a possibility that the shutter mechanism may be stored under severe temperature conditions (for example, on a dashboard of a summer car). Is less than the amount of film winding required, a stress is generated between the plastic component (such as the shutter drive lever 34) and the metal component (for example, the spring 42) or between the plastic components, thereby preventing the plastic component from being deformed.

The first operation of the wind-up knob 18 performed by the user for photographing is to wind the film 21 by 8 perforations, so that the shutter mechanism is charged, and the range of D shown in FIG. Exposure range. This exposure range "D" is a screen in which the edge number "E" is previously burned into the shoulder of the perforation 21a located at the center of the screen. Therefore, since the film 21 after development is exposed so that the positional relationship between the photographing screen and the frame number always corresponds, it is possible to prevent troubles such as mistakenly specifying the frame at the time of additional printing, and to simplify the specified frame. There are advantages to search for.

In the above-described embodiment, the film 21 is loaded in the unit after the shutter mechanism is brought to a state two perforations before the charged state. However, the present invention is not limited to this. If not, any state may be used. Therefore, the state may be a predetermined perforation in the range of 1 to 7 perforations. Along with this, the amount of winding of the winding knob 18 at the time of torque measurement also changes.

In the above embodiment, the operation of the shutter mechanism is checked after the film 21 is loaded in the unit. However, the present invention is not limited to this. The film 21 may be loaded in the unit. According to this, it is possible to omit the final inspection step described in the above-described embodiment, that is, the step of checking the operation of the shutter mechanism in the unit in a state after the completion of assembly.

[0031]

As described above in detail, according to the present invention, after the film is loaded in the unit in which the film winding mechanism is charged, the shutter is released to confirm the operation of the shutter mechanism. The inspection process includes one process and a second process of measuring the rotation torque of the winding knob by performing a winding operation of the winding knob for charging the shutter mechanism by two perforations of the film. The film winding to be performed can be reduced as much as possible, and photographing more than a specified number of sheets becomes possible.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a main part of a method for manufacturing a film unit with a lens according to the present invention.

FIG. 2 is a perspective view showing an appearance of a film unit with a lens.

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

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

FIG. 5 is an exploded perspective view schematically showing a shutter mechanism and a winding mechanism.

FIG. 6 is a perspective view showing a state where a film with a patrone is loaded into the main body.

FIGS. 7A and 7B are explanatory diagrams showing a state of a film with a cartridge built in the unit main body, wherein FIG. 7A shows a state before inspection and FIG. 7B shows a state after inspection.

FIG. 8 is an enlarged plan view of a driven sprocket.

[Explanation of symbols]

 Reference Signs List 11 unit body 14 rear cover 20 film with patrone 21 film 26 body base 27 mechanical unit 38 driven sprocket

Claims (6)

(57) [Claims] 1. A sprocket engaged with perforation of a film is driven by eight perforations of the film by a winding operation of a winding knob performed after a shutter is released, so that a shutter mechanism is charged via a film winding mechanism. In the method for manufacturing a film unit with a lens, the shutter mechanism provided in the unit is moved from a charged state to a position between 1 and 7
A first step of bringing the film into a state before the perforation, and a second step of loading a film into the unit after the first step.
And a method for manufacturing a film unit with a lens. 2. After the second step, a first inspection step of measuring the rotation torque of the winding knob by performing a winding operation of the winding knob for charging the shutter mechanism by 1 to 7 perforations of the film, and a shutter release. 2. The method for manufacturing a film unit with a lens according to claim 1, further comprising a second inspection step of performing an operation check of the shutter mechanism. 3. The unit according to claim 1, wherein a distance between an entrance housed in the patrone chamber and an end of an aperture provided in the unit is 1 to 3 perforations in film length. A method for manufacturing a film unit with a lens according to claim 1. 4. The film stored in the unit,
4. The method for manufacturing a film unit with a lens according to claim 1, wherein the length is a length specified in ISO. 5. A sprocket engaged with the perforation of the film is driven by eight perforations of the film by a winding operation of a winding knob performed after the shutter is released, and the shutter mechanism is charged via the film winding mechanism. In the method for manufacturing a film unit with a lens according to the above, after confirming the operation of a shutter mechanism provided in the unit,
A first step of bringing the shutter mechanism into a state one to seven perforations before the charging state, a second step of loading a film into the unit after the first step, and charging the shutter mechanism after the second step And a third step of measuring the rotational torque of the winding knob by performing a winding operation of the winding knob for setting the film for 1 to 7 perforations of the film. 6. The method for producing a lens-fitted film unit according to claim 2, wherein the film winding amount for 1 to 7 perforations is set to 2 perforations.