JPH1062911A - Cartridge for photographic film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To unwind film in a cartridge to the outside of the cartridge or take it up in a tightly wound state again by the rotation of an incorporated spool. SOLUTION: A light shielding member having a semicircular cross section 2A is turnably incorporated in the film entrance 13 of the cartridge 10. When the cartridge 10 is a simple body, the entrance 13 is closed by the cross section 12A so as to make the cartridge 10 in a lighttight state. In the case the film is loaded in a camera being an object, the light shielding member is turned by the operation of the camera, so that the entrance 13 is opened and a path for the film is bent in a chevron shape by a projection 14 formed on the cross section 12A. As a result, the proper tension is applied to the moving film.

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 capable of unwinding and winding a roll-shaped film housed in a cartridge.

[0002]

2. Description of the Related Art As a 35 mm film cartridge, a commercially available patrone is most commonly used. As is well known, this patrone is wound in a so-called "bull winding" state on a spool in which the film is built. Therefore, the film cannot be unwound even when the spool is rotated, so that the film is kept in a state where the leading end thereof always projects from the film entrance of the cartridge and can be easily pulled out.

[0003]

Accordingly, since the telemping material attached to the film entrance is required to have a light-blocking effect and a braking action for suppressing the movement of the film, it is necessary to strongly press the film, and therefore, the drawing resistance of the film is reduced. May be increased, or a flaw may be caused by adhesion of a foreign substance or the like.

[0004] Cartridges in which these points are improved are already disclosed in JP-A-3-116136 and JP-A-4-237.
No. 043 has been disclosed.

However, in the former case, tension is not applied when the film is wound into the cartridge, so that the film cannot be wound tightly around the spool. Therefore, a member for separately regulating the film diameter is additionally provided. Need
On the other hand, with respect to the latter, a member provided to keep the film in a tightly wound state may be unwound, which may be a resistance to the movement of the film during winding.

The present invention solves these problems and as a result, as a result, the film can be wound tightly by a very simple device, and the film can be smoothly unwound outside the cartridge without any great resistance. The purpose is to provide a film cartridge.

[0007]

An object of the present invention is to provide a photographic film cartridge in which a film wound around a spool is housed, and the film can be unwound and wound by rotation of the spool. A cartridge for a photographic film, characterized in that a turnable light-shielding member is incorporated at the entrance and a passage of a bent film is formed by turning the light-shielding member to an open position, and a film wound around a spool. Housed,
In the photographic film cartridge in which the film can be unwound and wound by rotation of the spool, an uneven surface which generates frictional resistance in only one direction is formed at the leading end of the film and the film entrance and exit of the cartridge. A photographic film cartridge, wherein a tension is applied to the film when the film is wound, and a film wound around a spool and held by a pair of flexible flange members supported by the spool. In the photographic film cartridge, wherein the film is housed and the film can be unwound and wound by rotation of the spool, the flexible flange member is rotated integrally with the spool when the film is unwound, and the film is wound. Sometimes the rotation is blocked A photograph in which a film cartridge and a film wound around a spool, a film held by a pair of flexible flange members supported by the spool are stored, and the film can be unwound and wound by rotation of the spool. In the film cartridge, the flexible flange member is prevented from being in close contact with the flexible film by a protrusion provided on the outer periphery, and the flexible film member is wound around a spool and a pair of flexible members supported by the spool. In a photographic film cartridge that stores a film held by a flexible flange member and enables the film to be unwound and wound by rotation of the spool, the flexible flange member is formed by a lip portion and a flange portion. The thickness t1 of the lip and the thickness of the flange t2 and is 1 ≦ t1
/ T2 ≦ 2, which is achieved by a photographic film cartridge.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the first to fourth embodiments of the present invention.
1 shows a photographic film cartridge (A) related to the present invention.

The cartridge (A) 10 has a film F
Is wound around a spool 11, and the film entrance 13 is closed by an axial light-shielding member 12 having a semicircular cross section to keep the film F in a light-tight state.

When the cartridge (A) 10 is loaded in a target camera and the light shielding member 12 is rotated to be switched to the open position, the film entrance 13 is opened and the spool 11 is driven and rotated. The film F
Can be unwound and wound.

After the film F has been wound, the cartridge (A) 10 rotates the light shielding member 12 to return to the closed position. The cartridge F is again taken out of the camera after maintaining the film F in a light-tight state. .

The light shielding member 12 has a film entrance 13
2A, which is a semicircular cross section 12A having a mountain-shaped projection 14 as shown in FIG. As shown in FIG. 2B, the projection of the protrusion 14 forms a bent film passage.

Therefore, the film F receives an appropriate frictional resistance when passing through the film entrance 13 and the resistance becomes a tension applied to the film F when the film F is wound on the cartridge (A) 10. It is wound in close contact with the spool 11 to be wound tightly.

FIG. 3 shows a projection 15 on the film passage itself.
Is provided, and shows an example in which a bent film passage is formed regardless of the rotation of the semicircular cross section 12B,
Also in this case, tension can be applied to the film F to be wound as in the previous embodiment.

FIGS. 4 (a) and 4 (b) show a cross section taken along the line BB in FIG. 2 (b) and a cross section taken along the line CC in FIG. 3 (b), respectively. When cut, each of the protrusions 14
By limiting the range in which the films 15 and 15 are formed so as to correspond to the cut width of the film, the front end of the film F can be easily passed during unwinding.

As a means for eliminating the frictional resistance of the film F when unwinding, as shown in FIG. 5, a light-shielding member 12 having a semicircular cross section 12C partially cut as shown in FIG. It is also possible to adopt a method of switching and using three stages of the closed position shown in FIG. 5, the unwinding position shown in FIG. 5B, and the winding position shown in FIG. 5C.

As shown in FIG. 6, each of the light-shielding members supports an end screw portion T by screwing it into the cartridge (A) 10 and supports each screw portion T according to the screwing position of the screw portion T. The light-shielding member can be switched between open and closed states.

The light shielding member 12 shown in FIG.
FIG. 6 shows a case in which a slit hole S is opened in 2D, and the screw portion T is loosened by turning the light shielding member 12.
As shown in FIG. 6A, the slits S are positioned in the horizontal direction to allow the film F to pass therethrough. When the slits are closed, the slits S are retracted from the horizontal direction as shown in FIG. 6B. To block the passage of light from outside.

Since each of the light-shielding members is held open or closed by the frictional force of the screw portion T, the cartridge (A) 10 is stably maintained in a light-tight state when the cartridge (A) 10 is used alone without being switched carelessly. You will be drowned.

To further secure the light tightness, as shown in FIG. 7, discs 11 connected to the spool 11 and the light shielding member 12, respectively, are provided on the outer surface of the cartridge (A) 10.
0 and an elastic stop lever 120 are installed as rotation restricting members, and as shown in FIG.
10 alone, the pin 12 at the tip of the stop lever 120
0A is engaged with the hole 110A of the disc 110,
The rotation of the spool 11 is prevented by preventing the rotation of the spool 2 and the opening of the film entrance 13.

After the cartridge (A) 10 is loaded into the camera, the stop lever 120 is retracted by pressing the pin P on the camera side, and the pin 120A is moved to the disk 110.
Release from engagement with. As a result, the rotation of the key K1 on the camera side rotates the light shielding member 12 to the position shown in FIG.

On the other hand, the spool 11 is also rotatable, and the film F is unwound and wound via the camera-side key K2.

If the sole purpose is to simply wind the film F in a close-wound state, as shown in FIG.
1 and a concave and convex surface R2 corresponding to the concave and convex surface R1 is also formed and placed in the passage of the film of the cartridge (A) 10. At the end of the winding of the film F, the front end of the film F is set to the camera side. When the tension is lost by detaching from the hoisting member, a method of applying tension to the film F by the frictional force generated between the uneven surfaces R1 and R2 can be adopted.

By providing the irregularities R1 and R2 with directionality, the resistance of the film F applied during unwinding can be extremely reduced.

FIG. 9 shows an example of a photographic film cartridge (B) according to claims 5 to 8 of the present invention.

The cartridge (B) 20 has a film F
Is wound around a spool 21 and stored.
The film F is kept in a light-tight state by the telemp attached to the film F.

When the cartridge (B) 20 is loaded in a target camera and the spool 21 is rotated, the film F can be unwound through a film entrance 23 and further wound up.

As shown in FIG. 9B, the spool 21 has a shaft portion 21A around which the film F is wound, and a pair of pin portions 24B which are pressed into and engaged with both shaft ends of the shaft portion 21A. And a pair of flexible flange members 22 rotatably supported between the shaft portion 21A and the key member 24.

The spool 21 is rotatably held by engaging the groove 24A of the key member 24 with the side wall of the cartridge (B) 20, and the film F wound on the shaft 21A has two side edges. Is held by the lip portion 22A of the flexible flange member 22 and is kept tightly wound.

When the key member 24 is rotated clockwise by operating the camera, a claw 24C provided on the back of the key member 24 is provided.
Are a plurality of square holes 2 provided in the flexible flange member 22.
2C to rotate the flexible flange member 22 as a whole, so that the film F
Are successively elastically deformed and retracted, are fed to the film entrance 23 and are unwound from the cartridge (B) 20.

On the other hand, when the key member 24 is rotated in the counterclockwise direction, the flexible flange member 22 is retracted by elastic deformation in the axial direction due to the pressing of the claw 24C. The flange member 22 is stationary without transmitting the rotational force, and therefore, the film F is in contact with the lip portion 22A.
Is wound around the shaft portion 21A and wound tightly in order only by elastically deforming a certain place.

In this case, when the flexible flange member 22 rotates following the frictional force or the like due to the winding of the film F, the side edge of the film F rides on the lip portion 22A and a tightly wound state cannot be obtained. Accordingly, in the present invention, a reverse rotation preventing function is additionally provided to the flexible flange member 22 to ensure that the stationary state of the flexible flange member 22 is more reliably maintained when the film F is wound. ing.

That is, the cartridge (B) 20 is shown in FIG.
As shown in FIG. 10A, a plurality of claws 20A protrude from the inner wall facing each other, while the flexible flange member 22 is further provided with a plurality of corners on the outer peripheral portion of the square hole 22C as shown in FIG. When the key member 24 is rotated counterclockwise when the hole 25 is provided, the square hole 22 </ b> C is
Although it is disengaged from the claw 24C, the square hole 25 is
As a result, the flexible member 22 is prevented from following the counterclockwise rotation, and is reliably brought to a stationary state.

When the film F is unwound, that is, when the flexible flange member 22 is rotated in the clockwise direction, the square hole 25 is retracted from the claw 20A by elastic deformation so as to be retracted from the flexible flange member 22. Does not hinder the rotation of

The flexible flange member 22 is locked by the square hole 25, as shown in FIGS. 11 (a) and 11 (b), and the notch 25 provided on the flange 22B of the lip 22A.
A or square hole 25B provided in lip portion 22A itself
The function of preventing reverse rotation can be exerted by making the shapes of the claws 20A projecting from the cartridge (B) 20 correspond to each other.

As shown in FIG. 11 (c), a flocked material 25C having a different brushing direction is provided on the flange surface of the flexible flange member 22 and the inner surface of the cartridge (B) 20 facing the flange surface.
When the flexible flange member 22 rotates clockwise, the flocked material 25C moves in the forward direction, thereby enabling the rotation of the flexible flange member 22. When rotating in the clockwise direction, the flexible flange member 22 can be prevented from rotating by moving in the reverse direction.

The flexible flange member 22 is formed of a soft material such as low-density polyethylene, vinyl acetate, and ionomer, and has an outer diameter of 16 m.
Since it is a highly flexible member having a thickness of about 0.3 mm to 0.5 mm and a thickness of about 0.3 mm to 0.5 mm, a plurality of pieces are closely adhered to each other in a parts feeder or the like after molding as shown in FIG. Cartridge (B)
20 and the function of rotation and rotation prevention described above may be impaired.

Therefore, in the present invention, as shown in FIGS. 12B and 12C, a flange 26A is further projected on the outer periphery of the flange surface, or a plurality of projections 26B are projected on the peripheral surface of the lip 22A. The arrangement prevents the plurality of flexible flange members 22 from being in close contact and overlapping.

Further, as shown in FIG.
By providing the step 26A in 2A, the difference between the inner diameter dimension D1 and the outer diameter dimension D2 can be made large to prevent overlapping.

Further, in addition to the above-described improvement in the unwinding and winding functions of the film F1, the present invention also improves the function of holding the film F of the flexible flange member 22 itself.

Considering only the retentivity of the film F, it is desirable that not only the flange surface but also the lip portion 22A be formed with a sufficiently large thickness t1 as shown in FIG. In order to apply elastic deformation to the flexible flange member 22 by unwinding and winding to retract the lip portion 22A, it is needless to say that the lip portion 22A has considerably large external forces f1 and f.
2 needs to act, which is not preferable.

For this reason, as shown in FIG. 13 (b), the flange surface and the lip portion 22A must be formed with a thickness t2 as small as possible. There is a possibility that it will jump out of the portion 22A.

Accordingly, the flexible flange member 22 of the present invention
13C, the lip portion 22A is curved as shown in FIG. 13C to increase the length h of engagement of the lip portion 22A with the film F, or the lip portion 22A as shown in FIG.
Only a film having a sufficiently large thickness t2 or a film formed by forming the lip portion 22A so as to form an acute angle θ smaller than a right angle of about 70 ° to 80 ° with respect to the flange surface as shown in FIG. With only the elasticity of F, the lip portion 22A is not easily retracted, and the tightly wound state is maintained.

[0044]

According to the present invention, the operation of unwinding and winding the film from the cartridge can be performed with higher reliability and safety while keeping the film in the cartridge tightly wound with extremely simple improvement. Thus, an extremely useful photographic film cartridge which can be carried out with the above method is provided.

Further, an extremely useful photographic film cartridge which can be carried out with higher certainty and stability in transferring and assembling parts has been provided.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a cartridge (A) of the present invention.

FIG. 2 is a sectional view of a main part of the cartridge (A) (part 1).

FIG. 3 is a sectional view of a main part of the cartridge (A) (part 2).

FIG. 4 is a sectional view of an essential part of FIGS. 2 and 3;

FIG. 5 is a sectional view of a main part of the cartridge (A) (part 3).

FIG. 6 is a sectional view of a main part of the cartridge (A) (part 4).

FIG. 7 is an external perspective view of a main part of the cartridge (A).

FIG. 8 is a sectional view of a main part of the cartridge (A) (part 5).

FIG. 9 is a perspective view of a main part of the cartridge (B) of the present invention.

FIG. 10 is an external perspective view of a cartridge (B) of the present invention.

FIG. 11 is an explanatory view (part 1) of a flexible flange member.

FIG. 12 is an explanatory view (part 2) of a flexible flange member.

FIG. 13 is an explanatory view (part 3) of a flexible flange member.

[Explanation of symbols]

 Reference Signs List 10 Cartridge (A) 11, 21 Spool 12 Light shielding member 13, 23 Film entrance 14, 15 Projection 20 Cartridge (B) 20A, 24C Claw 21A Shaft portion 22 Flexible flange member 22A Lip portion 22B Collar portion 22, 25, 25B Square hole 24 Key member 25A Notch 25C Flocking material

[Procedure amendment]

[Submission date] July 16, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0003

[Correction method] Change

[Correction contents]

[0003]

The object of the invention is to be Solved Therefore, accidentally fill
Pulling out the system and ruining the film
And when loading film into the camera,
Pull out the end of the film for a predetermined length and
The camera and loading the film into the camera
It was.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005] With respect to the former, the rotational force of the spool Fi
To the leader of the Lum
Wrap the film tightly so that it can be pushed out of the entrance
Configuration in which a leaf spring for maintaining the state is provided in the cartridge chamber
, The rotation of the spool may be heavy.
is there. Since Regarding the latter to keep the film tightly wound-out state
By providing a flange member on the spool,
Extrusion is possible, so the spool rotation is too much
Keeping the film tightly wound without making it heavy
Is possible.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

The present invention improves the latter flange member,
More reliably film from the film cartridge to the outside
An object of the present invention is to provide a photographic film cartridge that can be unwound .

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

[0007]

SUMMARY OF THE INVENTION The above object is achieved by a pair of flexible flange portions wound around a spool and supported by the spool.
For storing the film held by the material,
Unwinding and winding the film by rotating
Photographic film cartridges
The flexible flange member includes a lip portion and a flange portion.
And the thickness t1 of the lip portion and the thickness t of the flange portion.
Photographic film cartridge 2 and is characterized in that a relation of 1 ≦ t1 / t2 ≦ 2, and wound on a spool, a pair of flexible flange members for supporting the spool
The film held by the
Unwinding and winding the film by rotation
In a photographic film cartridge which is made possible,
The flexible flange member includes a lip portion and a flange portion.
And the lip and the flange are 70 ° to 80 °.
This is achieved by a photographic film cartridge characterized by being integrally formed with an included angle of ° .

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

Figure 1 DETAILED DESCRIPTION OF THE INVENTION, illustrates an example of a photograph film cartridge (A).

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0025

[Correction method] Change

[Correction contents]

FIG . 9 shows an example of another photographic film cartridge (B).

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction contents]

[0038] where, FIG. 12 (b) and 12 further or is protruded a flange portion 26A on the outer periphery of the flange surface, as shown (c), the or a plurality of projections ambient lip 22A 2
By protruding the 6B, a plurality of flexible flange members 22 are prevented from closely contacting and overlapping.

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0039

[Correction method] Change

[Correction contents]

Further lip portion 2 as shown in FIG. 12 (d)
By providing the stage 26 C to 2A, it is possible to prevent the overlap taking a large difference between the inner diameter D1 and outer diameter D2.

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0040

[Correction method] Change

[Correction contents]

The present invention is improved with the in accordance with the improvement of the unwinding and winding function of the film F1 described above, the flexible flange member 22 holding function of the film F with the per se
It was done. The description is given below.

[Procedure amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0043

[Correction method] Change

[Correction contents]

[0043] wherein flexible flange member 22, FIG. 13
13C, the lip 22A is curved to increase the length h of engagement of the lip 22A with the film F, or only the lip 22A has a sufficiently large thickness t1 as shown in FIG. 13D. Specifically, the thickness t1 of the lip portion 22A
And the thickness t2 of the flange portion is 1 ≦ t1 / t2 ≦ 2.
13E, or as shown in FIG. 13E, the lip 22A is
0 only by the elasticity of the film F by forming to form an acute angle less θ than a right angle of approximately ° lip 22A
Are not easily retracted and the tightly wound state is maintained .

[Procedure amendment 12]

[Document name to be amended] Statement

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

[1] mosquito external perspective view of cartridges (A).

[Procedure amendment 13]

[Document name to be amended] Statement

[Correction target item name] Fig. 9

[Correction method] Change

[Correction contents]

9 months main part perspective view of cartridges (B).

[Procedure amendment 14]

[Document name to be amended] Statement

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

Figure 10 is an external perspective view of the cartridge (B).

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masato Shimura 1st Sakuracho, Hino-shi, Tokyo Konica Corporation

Claims (8)

[Claims] 1. A film wound on a spool is stored,
In a photographic film cartridge in which the film can be unwound and wound by rotation of the spool, a rotatable light shielding member is incorporated at a film entrance and exit of the cartridge, and the light shielding member is turned to an open position by rotating the light shielding member to an open position. A cartridge for a photographic film, wherein a bent film passage is formed. 2. The light-shielding member is supported so as to be movable in the axial direction by screw fitting, and a passage of the film is opened or closed at both ends of the movement range. The photographic film cartridge according to the above. 3. The spool and the light blocking member include a rotation restricting member that can be engaged, and the rotation of the spool and the movement of the light blocking member are prevented by the engagement of the rotation restricting member, and are enabled by the disengagement. The photographic film cartridge according to claim 2, wherein 4. A film wound on a spool is stored,
In the photographic film cartridge in which the film can be unwound and wound by rotation of the spool, an uneven surface which generates frictional resistance in only one direction is formed at the leading end of the film and the film entrance and exit of the cartridge. A photographic film cartridge, wherein a tension acts on the film when the film is wound. 5. A photograph in which a film wound around a spool is held by a pair of flexible flange members supported by the spool, and the film can be unwound and wound by rotation of the spool. In the film cartridge, the flexible flange member is rotated integrally with the spool when unwinding the film,
A photographic film cartridge characterized in that rotation is prevented when winding the film. 6. A photograph in which a film wound around a spool and held by a pair of flexible flange members supported by the spool is housed, and the film can be unwound and wound by rotation of the spool. A cartridge for a photographic film, wherein the flexible flange member is prevented from being closely attached to the flexible flange member by a protrusion provided on an outer periphery thereof. 7. A photograph in which a film wound around a spool is held by a pair of flexible flange members supported by the spool, and the film can be unwound and wound by rotation of the spool. In the film cartridge, the flexible flange member includes a lip portion and a flange portion, and has a thickness t1 of the lip portion.
And a thickness t2 of the flange portion in a relationship of 1 ≦ t1 / t2 ≦ 2. 8. The photographic film cartridge according to claim 7, wherein said lip portion and said flange portion have the same thickness t2 and are integrally formed with a narrow angle of 70 ° to 80 °.