JPH08179472A - Photographic film cartridge - Google Patents

Abstract

PURPOSE: To shield external light entering an inside from a gap by means of applying external force on a cover member by providing a notched part whose cross section is bag-shaped on the lower part of the cover member which abuts on or is proximate to an inside wall on a lower side among film path inside walls. CONSTITUTION: The notched parts 57 and 58 having bag-shaped cross sections are provided on the lower part of the cover member 22 which abuts on or is proximate to the lower inside wall among the inside walls of the film path 21 in the case the member 22 is on a closing position. Thus, the light entering inside a cartridge caused by the sneak path of the external light and plural numbers of reflection can be shielded. Such shape by which the external light is not reflected toward the inside of the cartridge as a V-shaped state and a triangle state is desirable as the bag-shaped cross sections of the notched parts 57 and 58. The notched parts can be provided on two positions along the rotating direction of the member 22, and light shielding performance can be enhanced by providing the notched parts to be deviated from the center of the rotary shaft of the member 22 along a radius direction. Furthermore, ruggedness is formed on the inside surfaces of the notched parts 57 and 58 by means of crimp process, etc., so that inside surface reflection can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic film cartridge of the type in which a photographic film is fed by rotating a spool, and more particularly to a photographic film cartridge having a light-shielding lid member in a film passage.

[0002]

2. Description of the Related Art A conventional photographic film cartridge has been provided in a form in which the leading end of the film is slightly pulled out in advance. The camera grasps the leading edge of the film and pulls out the photographic film from the cartridge, and when winding it backwards, the spool is rotated in the film winding direction. A film passage serving as a passage for the photographic film is formed between the inside and the outside of the cartridge, and a pair of light-shielding telemps are provided above and below the inner wall of the film passage. Since the photographic film is pulled out while being sandwiched between the pair of teremps, the inside of the cartridge is always kept light-tight, and light is not covered. The Telempu is made of a mixed woven fabric made of glossy hair and highly elastic mohair as the raw material so that scratches will not occur even if it slides on the emulsion side of the photographic film and the opposite side. Has been done.

Recently, as described in US Pat. No. 4,834,306 and Japanese Patent Application Laid-Open No. 3-37645, Japanese Patent Application Laid-Open No. 2-124564, etc., the film is wound into the inside of the cartridge. There is known a photographic film cartridge which is provided in the form of a photographic film and in which the photographic film is fed out of the cartridge by rotating the spool in the film feeding direction. Further, in order to facilitate the storage and storage of the developed photographic film, it is possible to use a cartridge having the above-mentioned function as a container for storing the developed photographic film.
It is proposed in Japanese Patent Publication No. 179341.

By the way, in a photo film patrone of a type which delivers a film by rotating a spool, when a light-shielding telem is provided in a film passage of the film, a friction is generated between the photo film and the telem, which causes a trouble in feeding. There is a fear. Therefore, a light-shielding lid member is provided which is rotatable between the opening position and the closing position of the film passage. As shown in FIG. 14, the lid member 4 is composed of a lid portion 6 for opening and closing the film passage 5 and a pair of shaft portions 8 provided on both sides of the lid portion 6 so as to be operable from the outside of the side surface of the cartridge 7. Since the opening operation is performed in a dark room such as a camera or a photo printer, the inside of the patrone is shielded from light only at the closed position. In the closed position at this time, the upper side of the lid 6 is in contact with the inner wall of the film passage 5 and further rotation is blocked, and the lower side of the lid 6 is in contact with the inner wall of the film passage 5. , Or close to each other to shield the inside of the cartridge 7.

[0005]

By the way, in the unused state, the lid member 4 is inadvertently directed from the outside to the inside of the cartridge through the film passage 5 during transportation or while being carried by the user. When pressed, the external light may enter the inside of the cartridge 7. This is because when the lid 6 is pushed toward the inside of the cartridge 7, there is no gap on the upper side of the lid 6 because the inner wall of the film passage is in contact with the upper side of the lid 6 in the pressing direction. This is because on the lower side of 6 there is no inner wall of the film passage that faces the pressing direction, so the lid portion 6 bends toward the inside of the cartridge 7 due to the pressing, and a gap is created between the lid 6 and the film passage 5. On the lower side of the conventional lid portion 6, as shown in the same figure, the shape of the lid portion 6 and the inner wall of the film passage 5 which is in contact with the lid portion 6 is made into an uneven shape so as to prevent this, but it is merely an uneven shape. In the case, outside light is reflected multiple times through the gap created by being pressed from the outside to reach the inside of the cartridge, and as a result of the experiment, the photographic film wound on the spool 9 clearly shows light from the outermost circumference to the second lap. I was overwhelmed.

The present invention has been made in order to eliminate such an adverse effect, and surely shields the external light entering the inside of the cartridge from the gap generated by the external force applied to the lid member at the closed position. The purpose is to provide a photographic film patrone devised in this way.

[0007]

In order to achieve the above object, in the invention according to claim 1, when the lid member is in the closed position, the lid member comes into contact with or close to the lower inner wall of the inner wall of the film passage. A cutout portion having a bag-like cross section is provided in the lower part of the. According to this, the notch having the bag-shaped cross section can prevent the incident of the light entering the inside of the cartridge by the wraparound of the external light or the reflection of the external light multiple times. It is desirable that the cutout has a bag shape in cross section, such as a V shape or a triangular shape, which does not reflect external light toward the inside of the cartridge. The cutouts may be provided at two positions along the rotation direction of the lid member, and further, these cutouts are provided so as to be displaced from the center of the rotation axis of the lid member along the radial direction. Therefore, the light blocking effect can be improved. Further, if the inner surface of the cutout portion is provided with irregularities by, for example, graining, it is possible to prevent internal reflection.

The photographic film cartridge 1 of the present invention will be described below.
The structure of 0 will be described. Photo Film Patrone 1
0 is a long photographic film 1 inside the Patrone 11.
2 is wound on the spool 13 and stored in a roll,
The photo film 12 is sent to the outside of the cartridge 11 by rotating the spool 13 in the film sending direction.

The cartridge 11 comprises an upper case 14 and a lower case 15. The upper and lower cases 14 and 15 are provided in the lower case 15 with the spool 13, lid member 22 and spool lock 47 assembled. 4 engaging claws 1
It is detachably attached by 6. Upper / lower case 1
A film passage 21 for sending out the photographic film 12 is formed on the joint surfaces of the films 4 and 15. A label 17 having an identification mark printed thereon is attached to the outer periphery of the cartridge 11.

The spool 13 comprises a spool shaft 26, a pair of flanges 27 and 28, and a rotating member 29. The spool shaft 26 is integrally formed with a data plate 30, a pair of flange engaging portions 31 and 32, a slit 33 for locking the rear end of the film, and a rotating member engaging portion 34. For example, a drive shaft built in a camera or the like is engaged with the formed key grooves 35 and 36, and the drive shaft is rotated by the drive of the drive shaft. The rotating member 29 is integrally formed with a disc 38 provided with a ratchet pawl 37, a gear 39, and a display plate 40.
It rotates together with 6.

The pair of flanges 27, 28 have openings 27a, 28a formed at the center thereof.
The spool shaft 26 is inserted through the a and 28a from one direction, and is rotatably attached to the flange engaging portions 31 and 32 so as to sandwich the photographic film 12 from both sides.

The slit 33 is an opening into which the rear end 12a of the film is inserted, and a pair of elastic pressing ribs 33a and 33b formed by cutting out the center of the upper wall forming this opening and a lower wall. Ribs 33a, 33b
A pair of locking claws 33c, 33 formed to face
d and are provided. The spool shaft 26 has two locking holes 12 provided at the rear end 12a of the photographic film 12.
The photographic film 12 is wound with the emulsion surface facing inward in a state where the b and 12c are engaged with the locking claws 33b and 33c and the pressing ribs 33a and 33b are fitted in the elongated hole 12d.

The inside of the cartridge 11 is divided into three rooms, that is, an information room 18, a film room 19 and a display room 20, and when the spool 13 is incorporated into the cartridge body 11, the photo film 12 is formed together with the flanges 27 and 28. The film room 19, the data board 30 is housed in the information room 18, and the rotary member 19 is housed in the display room 20.

The photographic film cartridge 10 as described above has a film feeding function, a film loosing mechanism, an internal light-shielding mechanism,
Functions such as spool rotation lock, lid member lock, film type automatic detection, and film state external display are provided.

The internal light-shielding function is provided by the unexposed photographic film 1.
When the 2 is stowed, the cartridge 1 comes out from the film passage 21.
1 is a function of preventing external light from entering the inside of the unit 1. This function is performed by rotating the lid member 22. The lid member 22 is rotatably provided inside the film passage 21, and the shaft portion 2 having a C-shaped cross section is provided at both ends of the lid portion 22a.
It has a shape in which 4, 25 are integrally formed. Shaft 2
The end surfaces of the reference numerals 4 and 25 are exposed on both side surfaces of the cartridge 11, and the drive shafts for opening and closing the lid member are engaged when loaded in a camera or the like. By this rotation of the drive shaft, the lid member 22
Is rotated between a closed position where the lid portion 22a closes the film passage 21 as shown in FIG. 2 and an open position where the film passage 21 is opened as shown in FIG.

The film feeding function is composed of the separating claw 23 and the lips 27b and 28b. Separation claw 23
Is provided integrally with the lower case 15, and the spool 1
When 3 rotates in the film feeding direction, the leading end of the film is separated from the film chamber 19 toward the film passage 21 side.

The lips 27b and 28b are integrally formed so as to face the outer peripheral edges of the pair of flanges 27 and 28, respectively. These lips 27b and 28b have a function of performing a film feeding and film winding loosening function, and when the spool 13 is rotated in the film feeding direction, wraps the outermost end portions of the photographic film 12 and the spool shaft 26 Is transmitted to the outermost periphery of the photographic film 12, and the photographic film 12 is prevented from being loosened.

The photographic film 12 is provided with the spool 1 by the function of feeding the film and loosening the film.
When the film 3 is rotated in the film feeding direction, the separating claw 23
As a result, the leading end of the film of the photo film 12 is scooped toward the film passage 21 and is sent out of the cartridge 11 while spreading the lips 27b and 28b. In addition,
On one edge in the width direction of the film tip, there is a notch for catching the lip 28b so that a small portion of the film tip is projected from the flanges 27 and 28 when the film is completely housed inside the cartridge 11. It is provided.
This notch ensures that the leading edge of the film is scooped by the separating claw 23 when the film is fed out. In addition, above the separation claw 23, the separation claw 23 is formed on the inner wall of the upper case 14.
Ribs 55 are provided so as to face each other.
The ribs 55 are for pushing the photographic film 12 into the lip 27b of the flange 27 when the film is rolled up.

The lid member locking function is as shown in FIG.
When the lid member 22 is in the closed position, the tip 50a of the lock pole member 50 formed integrally with the upper case 14 enters into the gap of the shaft portion 24 having a C-shaped cross section to prevent the lid member 22 from rotating to the open position. It is a function to do. The drive shaft for opening and closing the lid member provided in the camera or the like has a section C when engaged with the shaft portion 24.
The tip 50a is pushed outward from the inside of the mold gap to release the lock of the lid member 22 at the open position to open and close it.

The film type automatic detection function is provided on the data board 3
The bar code 41a having the information on the film type is attached to the adhesive label 41 attached to 0 through the reading opening 42 formed on the side surface of the upper case 14 when the spool 13 is rotated in the film feeding direction. This is a function that allows a camera or the like to automatically read.

As shown in FIG. 5, the film status external display function controls the rotation stop of the spool 13 so that any one of the four display windows 43 to 46 formed on the side surface of the display plate 40 on the side of the display chamber 20. It is a function of displaying the state of the photographic film 12 by exposing it to the outside, for example, four states of unexposed, exposed, developed and partially exposed.

The spool lock function is performed by the gear 39 of the rotating member 29 which rotates inside the display chamber 18 and the spool lock 4.
It is carried out by meshing with 7, and this function is interlocked with the rotation of the lid member 22. Spool lock 47
Is attached so that the engagement claw 47a is movable between a lock position where the engagement claw 47a meshes with the gear 39 and a lock release position where the engagement claw 47a is retracted from the gear 39, and the one end portion 47b is pushed by the inner wall 49 of the upper case 14. , Always biased towards the retracted position. When the lid member 22 is rotated to the closed position, the lever 48 projecting from the shaft portion 25 pushes the other end portion 47c of the spool lock 47 to move the spool lock 47 to the locked position against the bias of the one end portion 47b. Move towards. When the lid member 22 rotates to the open position, the pressing of the other end 47c by the lever 48 is released, and the spool lock 47 moves to the unlocked position again by the urging of the one end 47b.

The photographic film 12 is a long film having a narrow width of, for example, about 24 mm. In addition to the positive film, the negative film, and the film sensitivity, the photographic film 12 has, for example, 15 mm.
There are different types such as frames, 25 frames, 40 frames, etc., which have different lengths depending on the specified number of frames. A transparent magnetic recording layer is provided on the supporting surface opposite to the emulsion surface so that various photographic information can be magnetically recorded from photographing to laboratory processing and various uses of the developed film.

The leading edge 12e of the photographic film 12
As shown in FIG. 6, the shape has a shape protruding toward one side in the width direction so that the separation claw 23 can easily scoop it. On one side in the width direction, a frame positioning perforation group is formed along the film feeding direction. The frame-positioning perforation group includes two different distances L1 and L in the middle part of the film which is exposed on the camera side.
2, the perforations 51 are continuously formed, and the perforations 51 are arranged in the order of a short pitch L1 and a long pitch L2 from the film front end 12e side. In the camera, film feeding control is performed so that the center in the longitudinal direction of the aperture is aligned with the center between the perforations 51 having a long pitch L2, and a photographed image is captured in a range 52 (planned photographing frame) indicated by a chain double-dashed line in the figure. Is formed as a latent image. Reference numeral 53 is a notch for hooking on the lip 28b.

As shown in FIGS. 7 and 8, the upper portion of the lid portion 22a abuts against the upper portion of the inner wall of the film passage in the closed position to prevent further rotation from the closed position to the open position. The restriction part 56 is integrally provided. The rotation restricting portion 56 has a hook shape in which the open side is oriented in a direction in which the open side rotates from the open position to the closed position, and the inner wall upper portion 54 of the counterpart film passage 21 is also formed into a hook shape. By these engagements, the rotation from the closed position to the open position is regulated, and the light shielding property in the upper portion of the film passage 21 is improved.

Since the central portion of the lid portion 22a is separated from the shaft portions 24 and 25 which are rotatably supported by the cartridge 11, it is easy to bend toward the inside of the cartridge 11 when an external force is applied from the outside. Therefore, as shown in detail in FIG. 8, the lower portion of the lid member 22a has a film passage 2 at the closed position.
Notch portions 57 and 58 having a V-shaped cross section are provided along the film feeding direction so that the open side faces the direction in which the outside light is incident, at a portion that is in contact with or close to the lower portion of the inner wall of 1. There is. The notches 57 and 58 are provided at two different positions along the rotation direction of the lid member 22, and these are provided so as to be displaced from each other in the radial direction from the center of the rotation axis of the lid member 22. There is. The cutout 57,
The cross-sectional shape of 58 is not limited to a V-shape, but has a bag shape having an open portion on one side so as to face the direction in which external light enters, and having a deep pocket toward the inside of the lower portion. May be

The lid portion 2 including the inner surfaces of the cutout portions 57 and 58
The lower surface of 2a is embossed to form slight irregularities in order to prevent reflection of light incident from the outside. It should be noted that instead of the embossing, an electric discharge pattern or the like in which unevenness is formed by electric discharge machining may be used.

The lid 22a is provided with a recess 61 on the inner side of the cartridge 11 for allowing the separation claw 23 to enter when the lid 22a is in the open position. This recess 61
Therefore, only one notch 57 can be formed in the lower portion of the lid 22a. However, on one side of the lid 22a,
Since the shaft portion 24 is rotatably supported by the cartridge 11, even if an external force is applied from the outside, the amount of bending toward the inside of the cartridge 11 is small, so that even one cutout portion 57 does not have a light blocking effect. there is no problem. Further, as shown in FIG. 10, the cartridge 11 is provided between each of the lid portion 22a, the shaft portion 24, and the shaft portion 25 on both sides of the one side and the opposite side.
A pair of collars 5 to prevent outside light from entering from both sides of the
9, 60 are integrally provided.

These collars 59, 60 are provided with blocking walls 62, 63 protruding into both sides of the film passage 21 at the time of the closed position so as to block the light shielding property from the sides. The walls 62 and 63 have a rounded shape so that the film passage 21 can smoothly enter both sides of the film passage 21. Further, both inner walls 64, 65 of the film passage 21 into which the blocking walls 62, 63 enter (see FIG. 9)
Is also rounded for smooth opening and closing. Note that only one of the rounded shapes may be used.

FIG. 11 shows a sectional shape of the shaft portion 24 of the lid member 22. Of the shaft portion 24, only the circular portions 67 and 68 (around the circular portion 67, see FIG. 10) slightly formed outside the collar portions 59 and 60 are rotatably supported by the cartridge 11. Has become. Therefore, as shown in FIG. 12, there is a gap A between the shaft exposing opening 70 formed at the joint between the upper and lower cases 14 and 15 and the exposed tip side of the shaft 24. . External light entering the interior through the clearance A is blocked by the collar 59, so the clearance A may be increased in order to reduce the frictional resistance when the lid member 22 rotates, but if it is too large, it may be increased at the developing station. Since there is a risk that a simple jig such as a screwdriver used when opening and closing the lid member 22 may get inside the gap A and cause damage or damage, a dimension of about 0.3 to 0.5 mm is preferable. Since the shaft portion 25 on the opposite side has the same structure, detailed description thereof will be omitted here.

[0031]

EXAMPLE Next, in order to confirm the optimum combination of the shape dimensions a and b of the cutout portions 57 and 58 and the surface roughness shown in FIG. 13, the lid member 22 having these dimensions and surface roughness changed. A large number of photographic film cartridges 10 using the above were prepared, and an experiment was carried out as to whether or not the photographic film 12 was light-exposed when an external force was applied to the respective lid members 22 from the film passage 21. In addition, the dimension a is the cutouts 57, 5
8 shows the depth, and the dimension b shows the opening width of the notches 57 and 58 along the rotation direction of the lid member 22.

In the experiment, with the light of 110,000 lux directed toward the film passage 21, the lid portion 22a of the lid member 22 in the closed position with a force of 500 gf directed from the film passage 21 toward the inside of the cartridge 11. It was done by applying force.
Table 1 shows the results. As the photographic film 12, a film having ISO 1600 film sensitivity was used.

[0033]

[Table 1]

The lid member 22 is made of a high-impact polystyrene (HIPS) material, and is subjected to secondary processing so that the lower surface of the lid portion 22a including the insides of the cutout portions 57 and 58 is mirror-finished. Irregularities are provided depending on the type of discharge and the texture. The surface roughness applied by mirror finishing is 0.8S to 6.3S by the maximum height method (Rmax), and the surface roughness applied by the discharge eye is 6S by the maximum height method (Rmax). .3S to 25
S, the surface roughness applied by the embossing is 25S to 50S by the maximum height method (Rmax).

In Table 1, x indicates that the photo film 12 wound around the spool 13 was covered with light from the film tip 12e to the second lap, and ● indicates the first lap from the film tip 12e. It means that light was not covered by the above, and ◯ means that no light was covered at all. As a result, the dimension a and the dimension b are each 0.2
When the thickness is set to mm, the electric discharge and the surface roughness applied by the embossing are optimal, and when the size a and the size b are set to 0.3 mm, respectively, that is, mirror finishing, electric discharge, It was found that any of the surface roughness applied by any of the above-mentioned and the texture processing may be used. this is,
It can be considered that since the notches 57 and 58 have large depths and widths, it is possible to block even light reflected multiple times on the inner surface.

As the resin material of the lid member 22 and the cartridge 11 described in the above embodiment, a thermoplastic resin material is preferable in view of suitability for mass production and price, and carbon black is used as a light-shielding agent in an amount of 0.05% by weight to 3.00%. What contains a weight% may be used. In addition, lubricants such as silicone oil, antistatic agents, inorganic or organic pigments such as titanium oxide, processing aids such as zinc stearate, antioxidants, nucleating agents, plasticizers, etc. may be added to such resins as required. It may be contained.

Examples of the resin include polystyrene resin, impact-resistant polystyrene resin, styrene-acrylonitrile copolymer resin, styrene-acrylonitrile-butadiene copolymer resin, polypropylene resin, high-density polyethylene resin, polyethylene terephthalate resin, polybutylene terephthalate resin. Polycarbonate resin, polyvinyl chloride resin, and modified resins thereof are suitable. When considering dimensional accuracy, physical strength, and ultrasonic welding suitability, the melt flow rate is 1.0
Impact-resistant polystyrene resins containing 0.1 to 10% by weight of synthetic rubber for up to 10.0 g / 10 minutes, preferably 2.0 to 8.0 g / 10 minutes, and particularly preferably 2.5 to 7 g / 10 minutes are preferred. The other preferable required property of this resin is a flexural modulus of 15,000 to 30,000 kg / cm ² , preferably 1,8,000 to ² from the viewpoint of preventing deformation.
8,000 kg / cm ^2, particularly preferably 20,000~28,000kg / cm ^2, Vicat softening point (15 kg load) 80 ° C or higher, preferably 85 ° C or more, and particularly preferably 90 ° C or higher.

Further, as a particularly suitable resin material, K
3350, Denka PSM991Y-14, and Mitsubishi Polytech YH061-
A material such as 00802 may be used. The properties of these materials are shown in Table 2.
As shown in. In addition, K335 is shown in Table 2.
0 is for Denka PSM991-14Y, is for Mitsubishi Polytech YH061-0
It is 0802.

[0039]

[Table 2]

The carbon black contained in such a resin is added to secure the light shielding property. There are furnace carbon black, channel carbon black, thermal carbon black, etc., classified by the manufacturing method of carbon black, but there are photographic adverse effects (such as fog generation, decreased sensitivity or increased photosensitivity).
Average particle size is 10-80
Furnace carbon blacks with mμ and PH 5 to 9 are preferred, and furnace carbon blacks with 15 to 50 mμ and PH 6 to 8 are particularly preferred.

Commercially available products include, for example, carbon black # 20 (B), # 30 (B), # 33 (B), # 40 (B), # 41 (B), # 44 manufactured by Mitsubishi Kasei.
(B), # 45 (B), # 50, # 55, # 100, # 600, # 2200 (B), # 2400 (B), MA
8, MA11, MA100 etc. can be mentioned. As an overseas product,
For example Cabot Black Pearls 2, 46,70,71,74,8
0,81,607 etc., Regal 300,330,400,660,991, SRF-S etc., S
terling 10, SO, V, S, FT-FF, MT-FF, etc. In addition, Ashland Chemical's Uniteel R, BB, 15,102,
3001,3004,3006,3007,3008,3009,3011,3012, XC-3016, XC
-3017, 3020 and the like, but not limited thereto.

The particle size of the furnace carbon black is 10
If it is less than mμ, the kneading property with the resin is poor and the light-shielding property and the physical strength are deteriorated. On the other hand, if it exceeds 100 mμ, the light-shielding ability is inferior even if the dispersion is good, and if the carbon concentration is increased to secure the light-shielding property, the physical strength is lowered and the moldability is deteriorated, so that it cannot be put to practical use. Further, most of the carbon blacks having a PH exceeding 5 to 9 are apt to cause photographic adverse effects and cannot be used.

In order to prevent the photographic properties of the photographic film 12 from being adversely affected, the free sulfur content in the carbon black is 0.6% or less, preferably 0.3% or less, and particularly preferably 0.1. It is better to be less than or equal to%. The cyan compound content is 0.01% or less, preferably 0.00
It is preferably 5% or less, particularly preferably 0.001% or less. Further, the aldehyde compound content is 0.1% or less, preferably 0.05% or less, particularly preferably 0.0
It is 1% or less. Care should be taken because these substances, even in small amounts, adversely affect the photographic properties.

The amount of furnace carbon black added is
From the viewpoints of securing the light-shielding property, injection moldability, and securing the physical strength of the cartridge 11, 0.05% by weight to 3.00% by weight is preferable. If the amount of carbon black added is less than 0.05% by weight, the light-shielding property is insufficient, and if it exceeds 3.00% by weight, the cartridge 11
Since the physical strength of No. 1 is lowered and the water absorption rate is increased, weld marks, silver strips, etc. are generated during injection molding, resulting in poor appearance and deterioration of surface strength.

As the light-shielding substance, in addition to carbon black, an inorganic pigment such as titanium oxide, red iron oxide, calcium carbonate, or an organic dye may be used in combination.

As a method of imparting lubricity to the lid member 22 and the cartridge 11 of the present invention, there are a method of adding a lubricant to a resin for molding them and a method of applying a lubricant to a molded product. As the lubricant, silicone oils, higher fatty acid amides such as oleic acid amide and erucic acid amide,
There are metal salts of higher fatty acids such as zinc stearate, higher alcohol esters, fatty acid esters of esters of polyhydric alcohols, etc., but are not particularly limited.

Silicone oil added to the lid member 22 and the cartridge 11 is disclosed in JP-A-62-286043.
JP-A-62-284355 and dimethylpolysiloxane and carboxyl-modified silicone oil are preferred. The amount of silicone oil added is 0.05% to 5.0% by weight, preferably 1.0% by weight.
% To 3.0% by weight.

If the amount is less than 0.05% by weight, the desired lubricity effect cannot be obtained, and if the amount added exceeds 5.0% by weight, the resin slips in the screw of the injection molding machine and the molding cycle becomes longer, The amount of silicone oozing on the surface of the molded product increases, and the oil oozing out is Patrone 1
The image is transferred to the photographic film 12 in 1 and a photographic adverse effect such as hindering the diffusion of the developing solution into the photographic film 12 occurs during the development of the photographic film. Further, in the ultrasonic sealing, the adhesion between the upper and lower cases 14 and 15 is reduced.

Silicone oil has a viscosity of 1000 at 25 ° C.
It is preferably -60,000 CS. Viscosity at 25 ° C is 1000
If it is less than CS, the bleed-out will be severe and the photographic performance will be affected. If it exceeds 60000CS, the kneading property with the resin is poor and it cannot be used. In addition to the above, various modified silicone oils such as fluorine-modified silicone oils are commercially available as silicone oils, but most of them adversely affect the photographic properties of photographic films, so it is important to use them carefully. is there. It could not be used for the photographic film cartridge 10 of the present invention because of insufficient lubricity or severe thermal decomposition during injection molding.

In order to prevent the oxidative decomposition of the resin of the present invention and to prevent the formation of decomposition products (for example, alcohols, aldehydes, ketones, carboxylic acids, etc.) as adverse substances for the photographic properties of photographic light-sensitive materials, oxidation is carried out. Inhibitors can be added. Representative examples of antioxidants are shown below.

(A) Phenol type antioxidant Vitamin E, vitamin E carboxylic acid ester, 6-t-
Butyl-3-methylphenyl derivative, 2.6-di-t
-Butyl-P-cresol, 2.2'-methylenebis-
(4-Ethyl-6-t-butylphenol), 4 '
-Butylidene bis (6-t-butyl-m-cresol), 4.4'-thiobis (6-t-butyl-m-cresol), 4.4'-dihydroxydiphenylcyclohexane, alkylated bisphenol, styrenated phenol, 2 6-di-t-butyl-4-methylphenol, n-octadecyl-3- (3'.5'di-t-butyl-4'-hydroxyphenyl) propionate, 2.
2'-methylenebis (4-methyl-6-t-butylphenol), 4'-theobis (3-methyl-6-t-
Butylphenol), 4.4'-butylidene bis (3-
Methyl-6-t-butylphenol), stearyl β
(3.5-di-4-butyl-4-hydroxyphenyl)
Propionate, 1.1-Tris (2-methyl-4)
Hydroxy-5-t-butylphenyl) butane, 1.3
・ 5-Trimethyl-2,4,6-tris (3,5-di-
t-butyl-4hydroxybenzyl) benzene, tetrakis [methylene-3 (3 ′ · 5′-di-t-butyl-
4′-hydroxyphenyl) propionate] methane and the like.

(B) Ketone amine condensation-type antioxidant 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline, a polymer of 2,2,4-trimethyl-1,2-dihydroquinoline, trimethyl Dihydroquinoline derivatives and the like. (C) Allylamine Antioxidant Phenyl-α-naphthylamine, N-phenyl-β-naphthylamine, N-phenyl-N′-isopropyl-P
-Phenylenediamine, N.N'-di-phenyl-P-
Phenylenediamine, N · N′-di-β-naphthyl-P
-Phenylenediamine, N- (3'hydroxybutylidene) -1-naphthylamine and the like. (D) Imidazole type antioxidant 2-mercaptobenzimidazole, zinc salt of 2-mercaptobenzimidazole, 2-mercaptomethylbenzimidazole and the like.

(E) Phosphite type antioxidants Alkylated allyl phosphite, diphenylisodecyl phosphite, tris (nonylphenyl) phosphite sodium phosphite, trinonylphenyl phosphite, triphenyl phosphite and the like. (F) Thiourea-based antioxidants Thiourea derivatives, 1,3-bis (dimethylaminopropyl) -2-thiourea and the like. (G) Other antioxidants useful for air oxidation, such as dilauryl thiodipropionate.

(H) Hindered phenolic antioxidant 1,3,5-trimethyl-2,4,6-tris (3,5)
-Di-tert-butyl-4-hydroxyberdyl) benzene, tetrakis [methylene (3.5-di-tert)
-Butyl-4-hydroxy-hydrocinnamate)] methane, octadecyl-3,5-di-tert-butyl-
4-hydroxy-hydrocinnamate, 2.2 ', 2'
-Tris [(3.5-di-tert-butyl-4-hydroxyphenyl) propionyloxy] isocyanurate, tetrakis (2.4-di-tert-butylphenyl) 4.4'-biphenylenediphosphite, 4.
4'-thiobis- (6-tert-butyl-O-cresol), 2.2'-thiobis- (6-tert-butyl-4-methylphenol), tris- (2-methyl-4)
-Hydroxy-5-tert-butylphenyl) butane, 2.2'-methylene-bis- (4-methyl-6-t
ert-butylphenol), 4,4'-methylene-bis- (2.6-di-tert-butylphenol), 4
* 4'-butylidene bis- (3-methyl-6-tert
-Butylphenol), 2,6-di-tert-butyl-4-methylphenol, 4-hydroxymethyl-2
-6-di-tert-butylphenol, 2,6-di-
tert-4-n-butylphenol, 2.6-bis (2'-hydroxy-3'-tert-butyl-3'-
Methylbenzyl) -4-methylphenol, 4.4'-
Methylene-bis- (6-tert-butyl-O-cresol), 4'-butylidene bis- (6-tert-
Butyl-m-cresol). Melting point (Meltingpoi)
nt) is preferably 100 ° C. or higher, particularly 120 ° C.
The above is preferable.

Representative commercial antioxidants are shown below. (1) Phenolic antioxidant: SUMILIZER
BHT (Sumitomo Chemical), IRGANOX 1076 (Ciba Geigy), MARK AO-50 (Adeka Argus), SUMILIZER BP-76 (Sumitomo Chemical),
TOMINOX SS (Yoshitomi), IRGANOX 56
5 (Ciba Geigy), NONOX WSP (ICI),
SANTNOX (Monsanto), SUMILIZE
ER WXR (Sumitomo Chemical), ANTAGEGRYSTA
L (Kawaguchi), IRGANOX 1035 (Ciba Geigy), ANTAGE W-400 (Kawaguchi), NOCLI
ZERNS-6 (Ouchi Shinko), IRGANOX 142
5WL (Ciba Geigy), MARK AO-80 (Adeka Argus), SUMILIZER GA-80 (Sumitomo Chemical), TOPANOL CA (ICI), MARK
AO-30 (Adeka Argus), MARK AO-
20 (Adeka Argus), IRGANOX3114
(Ciba Geigy), MARK AO-330 (Adeka
Argus), IRGANOX 1330 (Ciba Geigy), CYANOX 1790 (ACC), IRGAN
OX 1010 (Ciba Geigy), MARK AO-6
0 (Adeka Argus), SUMILIZER BP-
101 (Sumitomo Chemical), TOMINOX TT (Yoshitomi),
etc.

(2) Phosphorus antioxidant: IRGAFOS
168 (Ciba Geigy), MARK 2112 (Adeka
Argus), Weston 618 (BorgWarner), MARK PEP-8 (Adeka Argus), U
LTRANOX 626 (BorgWarner), MARK
PEP-24G (Adeka Argus), MARK P
EP-36 (Adeka Argus), HGA (Sanko), etc.

(3) Thioether type antioxidant: DLT
DP "YOSHITOMI" (Yoshitomi), SUMILIZ
ER TPL (Sumitomo Chemical), ANTIOX L (NOF), DMTD “YOSHITOMI” (Yoshitomi), SU
MILIZER TPT (Sumitomo Chemical), ANTIOX
M (NOF), DSTP "YOSHITOMI" (Yoshitomi), SUMILIZER TPS (Sumitomo Chemical), AN
TIOX (NOF), SEENOX 412S (Cipro), MARK AO-412S (Adeka Argus), SUMILIZER TP-D (Sumitomo Chemical), M
ARK AO-23 (Adeka Argus), SANDS
TABP-EPQ (sand), IRGAFOS P-B
PQ FF (Ciba Geigy), IRGANOX 122
2 (Ciba Geigy), MARK 329K (Adeka Argus), Weston 399 (Borg Warner), MARK 260 (Adeka Argus), MAR
K 529A (Adeka Argus) etc. (4) Metal deactivator: NAUGARD XL-1 (Uniroyal), MARKCDA-1 (Adeka Argus), MARK CDA-6 (Adeka Argus), L
AGANOX MD-1024 (Ciba Geigy), CU
NOX (Mitsui Toatsu) etc.

Preferred antioxidants are phenolic antioxidants, and hindered phenolic antioxidants are particularly preferred. Commercially available products include various Irganox products manufactured by Ciba-Geigy and SUMILIZER B manufactured by Sumitomo Chemical Co., Ltd.
HT, SUMILIZER BH-76, SUMILIZE
ER WX-R, SUMILIZER BP-101 and the like.

Also, 2,6-di-t-butyl-p-cresol (BHT), a low volatility, high molecular weight hindered phenol type antioxidant (trade name: Ireganox 101)
0, Ireganox 1075, Topanol CA,
(Ionox 330 etc.), dilauryl thiodipropionate, distearyl thiopropionate, dialkyl phosphate and the like, and it is effective to use one or more, particularly two or more thereof in combination. However, antioxidants are reducing substances,
Originally, it is a substance that adversely affects the photographic light-sensitive material, and it is necessary to select the type and addition amount in consideration of the effect balance with the effect of suppressing thermal decomposition. Phenol-based and phosphorus-based antioxidants are preferable because they have less adverse effects on the photographic light-sensitive material such as fog and abnormal sensitivity. As the phenolic antioxidant, a hindered phenolic antioxidant is particularly preferable. Among the hindered phenolic antioxidants, those having a melting point of 100 ° C or higher, particularly 120 ° C or higher are preferable. Particularly, it is preferable to use two or more kinds of phenolic antioxidants and / or phosphorus antioxidants in combination.

Further, when used in combination with carbon black or the like, the antioxidant effect exerts a synergistic effect. The combined use of a phenol-based antioxidant, a phosphorus-based antioxidant and carbon black is preferable because the antioxidant effect is particularly exhibited.

Others Various antioxidants disclosed on pages 794 to 799 of the Plastic Data Handbook (published by KK Industrial Research Society) and various types disclosed on pages 327 to 329 of Plastic Additives Data Collection (KK Chemical Industry Co., Ltd.). Antioxidants and PLASTICS AGE E
It is possible to select and use various antioxidants and the like disclosed on pages 211 to 212 of NCYCLOPEDIA Advanced Edition 1986 (KK Plastic Age).

A mechanism for preventing the above antioxidant from adversely affecting the photographic light-sensitive material will be described.
The oxidative decomposition of the thermoplastic resin is larger in the resin having more CH ₃ branches. This is because the amount of oxygen absorbed is large.

It is considered that the autoxidation of hydrocarbons proceeds in a chain as follows, once free radicals are produced by dehydration in the presence of oxygen. RH → R ・ R ・ + O ₂ → RH → ROO ・ ROO ・ + RH → ROOH + R ・ ROOH → RO ・ + ・ OH RO ・ + RH → ROH + R ・ ・ OH + RH → HOH + R ・ In this way, the oxidation of hydrocarbons is accelerated. It produces a large amount of alcohol, aldehyde, acid, etc., which further react with each other to form a polymer.

In order to prevent the oxidation of hydrocarbons, it is necessary to go through the above chain reaction, and therefore an antioxidant is used. In addition, it is also preferable to add the radical scavenger described below.

As the radical scavenger used in the present invention, 1 • 1-diphenyl-2-picrylhydrazyl, 1
・ 3.5-Triphenylferdazyl, 2,2,6.6
-Tetramethyl-4-piperidone-1-oxyl, N-
(3-N-oxyanilino-1,3-dimethylbutylidene) -aniline oxide, high valent metal salts such as ferric chloride, diphenylpicrylhydrazine, diphenylamine, hydroquinone, t-butylcatechol, dithiobenzoyl disulfide. , P · p′-ditolyl trisulfide, benzoquinone derivatives, nitro compounds, and nitroso compounds. Among these, it is particularly preferable to use hydroquinone.
The above radical scavengers may be used alone or in combination of several kinds. The content of the radical scavenger is 1.000 to 10.000 ppm.

Antioxidants include free radical chain terminators that react with and inactivate free radicals (mainly ROO.) That are chain propagators, and hydroperoxide ROOH that is a major source of free radicals. There is a peroxide decomposer that decomposes and stabilizes this.

The former includes alkylphenol antioxidants and aromatic amine antioxidants. The latter includes sulfur-based antioxidants and phosphorus-based antioxidants.

Since various antioxidants are also reducing agents that adversely affect the photographic light-sensitive material, the quality deterioration of the photographic light-sensitive material becomes a serious problem unless the kind and the amount added are carefully examined.

An antistatic agent can be added to the light-shielding thermoplastic resin of the present invention. Representative examples of the antistatic agent are shown below. I. Nonionic (= non-ionic) alkylamine derivative: T-B103 (Matsumoto Yushi), T-B104 (Matsumoto Yushi) alkylamide type polyoxyethylene alkylamine: Armostat 3
10 (Lion oil and fat) Tertiary amine (lauryl amine): Armostat 400
(Lion oil / fat) N, N-bis (2-hydroxyethylcocoamine): Armostat 410 (Lion oil / fat) Tertiary amine: ANTISTATIC 273C, 273,
273E (Fine Org. Chem) N-hydroxyhexadecyl-di-eth
anol-amine: Belg. P. 654.049 N-hydroxyoctadecyl-di-eth
anol-amine: (National Dis
t. )

Fatty acid amide derivative: TB-115
(Matsumoto Oil & Fat), Elegan P100 (Nippon Oil & Fat), Eleek SM-2 (Yoshimura Oil Chemicals) Hydroxystearic acid amide Oxalic acid-N, N'-distearylamide butyl ester: Hoechst polyoxyethylene alkylamide

Ether type polyoxyethylene alkyl ether RO (CH ₂ CH ₂ O) nH Polyoxyethylene alkylphenyl ether Special nonionic type: Resist 104, PE100, 1
16-118 (Daiichi Kogyo Seiyaku), Registered PE13
2,139 (Daiichi Kogyo Seiyaku Co., Ltd.), Elegan E115, Chemistat 1005 (NOF Corporation), ELIQUE BM-1 (Yoshimura Yushi Kagaku), Electrostripper TS, TS2.
3,5, EA, EA2,3 (Kao soap) Polyhydric alcohol ester type glycerin fatty acid ester: mono-, di-, or triglyceride such as stearic acid or hydroxystearic acid, monoglyceride (Nippon camphor), TB-123 (Matsumoto Yushi) , Resist 113 (Daiichi Kogyo Seiyaku) Sorbitan fatty acid ester Special ester: Eleek BS-1 (Yoshimura Oil Chemicals) 1-Hydroxyethyl-2-dodecylglyoxazoline: British cellophane

II. Anionic Sulfonic Acids Alkyl Sulfonate RSO ₃ Na Alkylbenzene Sulfonate Alkyl Sulfate ROSO ₃ Na Phosphate Ester Alkyl Phosphate

III. Cationic amide type cation: Resist PE300, 40
1,402,406,411 (Daiichi Kogyo Seiyaku Co., Ltd.) Quaternary ammonium salt Quaternary ammonium chloride Quaternary ammonium sulfate Quaternary ammonium nitrate Katimin CSM-9 (Yoshimura Yugaku), CATANAC6
09 (American Dianamide), Denon 314C (Maruhishi Oilification), Armostat 300 (Lion oil), 1
00V (Armor), Electro Stripper ES (Kao Soap), Chemistat 2009A (Nippon Yushi) Stearamido propyl-dimension
l-β-hydroxyammonium
nitrate: CATANAC SN (American dianamid)

IV. Zwitterionic alkylpetine type imidazoline type rheostat 53,532 (lion oil), AMS5
3 (by Lion Yushi), AMS303,313 (by Lion Yushi) alkyl imidazoline type metal salt type AMS576 (by Lion Yushi) Rheostat 826,923 (Lion _{oil) (RNR'CH 2 CH 2 CH 2} NCH 2 COO) 2 Mg
R ≧ C, R ′ = H or (CH ₂ ) mCOO- (lion oil) R = C ₃ to _N hydrocarbon, A = oxygen or imino group, M =
Organic amine or metal alkylalanine type

V. Conductive Resin Polyvinylbenzyl Cation Polyacrylic Acid Cation

VI. Others Register 204, 205 (Daiichi Kogyo Seiyaku), Elegan 2E, 100E (NOF Corporation), Chemistat 100
2,1003,2010 (Nippon Yushi), Eleek 51
(Yoshimura Yugaku), ALROMINE RV-100 (Geigy) Above all, nonionic (nonionic) antistatic agents are particularly preferable because they have little adverse effect on photographic properties and human body among the antistatic agents.

The total amount of one or more of the above antistatic agents added is 0.001 to 5.0% by weight, preferably 0.1.
It is 005 to 3.0% by weight. If the amount added is less than 0.001% by weight, the antistatic effect and the lubricity improving effect are hardly exhibited, and the kneading cost only increases. Further, if the addition amount exceeds 5.0% by weight, not only is there little increase effect, but also the increase in bleed-out with time and the resin extrusion amount fluctuate greatly due to the slip with the screw, and the layer thickness varies. And other problems occur.

In addition, various kinds of additives can be selected and contained in accordance with the required characteristics and the purpose of use, in the kind and amount which do not adversely affect the photographic characteristics. Other additives are shown in Table 3.

[0079]

[Table 3]

[0080]

As described above, according to the first aspect of the invention, the cutout portion having the bag-shaped cross section provided in the lid member allows the outside light to enter the inside of the cartridge by being reflected or reflected a plurality of times. The incidence of light can be blocked. In another invention, it is provided at two places along the rotation direction of the lid member,
Further, by providing these notches so as to be displaced from the center of the rotation axis of the lid member along the radial direction, it is possible to enhance the light-shielding property. Further, in the invention according to the fourth aspect, if the inner surface of the cutout portion is provided with unevenness by a texture treatment or the like, the light incident on the inside of the cartridge can be scattered by the internal reflection.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a photographic film cartridge.

FIG. 2 is a cross-sectional view of the photographic film cartridge showing a state in which the lid member is in the closed position.

FIG. 3 is a cross-sectional view of the photographic film cartridge showing the state in which the lid member is in the open position.

FIG. 4 is a side view of a photo film cartridge on the information room side, in which a part thereof is shown in a cutaway manner.

FIG. 5 is a side view of the photographic film cartridge on the side of the display chamber, in which a part thereof is cut away.

FIG. 6 is a plan view of the photographic film viewed from the side opposite to the emulsion surface.

FIG. 7 is a perspective view showing a cutout portion of a lid member.

FIG. 8 is an enlarged cross-sectional view of a main part showing a cutout portion by cutting the lid member in the closed position at the center.

FIG. 9 is an enlarged sectional view of an essential part cut along the side of the lid member.

FIG. 10 is a perspective view showing an outer appearance of a lid member.

FIG. 11 is a cross-sectional view taken along a shaft portion.

FIG. 12 is an enlarged side view of essential parts showing a portion where a shaft portion is exposed from a side surface of the cartridge.

FIG. 13 is an enlarged sectional view of an essential part for explaining the dimensions of the cutout part of the lid member.

FIG. 14 is a sectional view of the photographic film cartridge described in the related art.

[Explanation of symbols]

 7,11 Patrone 10 Photo film Patrone 12 Photo film 9,13 Spool 4,22 Lid member 57,58 Notch

Claims (4)

[Claims] 1. A photographic film cartridge in which a spool is rotated in a film feeding direction to feed a photographic film to the outside of the film cartridge through the film passage, wherein the film passage is between a closed position and an open position where the film passage is closed. Is provided with a lid member that is rotatable with respect to the direction in which external light is incident on the lower portion of the inner wall of the film passage that abuts or approaches the lower inner wall of the film passage at the closed position. A photographic film cartridge is characterized in that a cutout portion having a bag shape in cross section is provided so that the open sides face each other. 2. The photographic film cartridge according to claim 1, wherein the cutout portion is provided at two different positions along a rotation direction of the lid member. 3. The photographic film cartridge according to claim 2, wherein the notch is provided so as to be displaced from the center of the rotation axis of the lid member along the radial direction. 4. The photographic film cartridge according to claim 1, wherein an inner surface of the cutout portion is provided with irregularities.