JPH02264248A - Photographic film cartridge - Google Patents

Abstract

PURPOSE:To send a photographic film out of a cartridge automatically by using a mechanism in a camera by locking the photographic film to the flange of a spool by an easily separable lock means. CONSTITUTION:The tip of the photographic film 3 is arrayed in a film lead-out slit 5. A couple of flanges 6 which extend at right angles to the spool 2 are formed at both ends of the spool 2 and the photographic film 3 is wound closely in a roll shape around the spool 2 between the couple of flanges 6 so that the end surfaces of the photographic film 3 are along the flanges 6. The photographic film 3 is locked to the couple of flanges 6 by the easily separable lock means 7 at the outermost circumference of the rolled photographic film 3. The lock force of this lock means 7 is not large and the photographic film 3 is released by the reverse rotation of the spool 2 from being locked by the lock means 7 to the flanges 6 of the spool 2. Consequently, the photographic film 3 can be sent out of the cartridge automatically.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a photographic film cartridge.

[Conventional technology]

In conventional photographic film cartridges, the photographic film is not tightly wound around the spool inside the cartridge, but is stored in a loosely wound state, and the spool is rotated in the opposite direction to the film winding direction. However, the photographic film could not be fed out from the photographic film drawer. For this reason, attach an appropriate length of the film edge (usually called the "tongue") to the exterior of the cartridge in advance! When you pull out the cartridge and load it into the camera, you need to set the end of the film in the camera's film advance mechanism (for example, align the perforations of the photographic film with the camera's sprocket wheel). there was.

However, this operation requires a certain degree of skill, and
This is a time-consuming process, and there has long been a desire for a photographic film cartridge that can be loaded into a camera without requiring such operations.

[Problem to be solved by the invention]

Such a photographic film cartridge can automatically feed photographic film from inside the cartridge to the outside using an appropriate mechanism inside the camera! This can be achieved by doing the following. If it is possible to feed the photographic film from inside the cartridge to the outside, after loading the cartridge into the camera, it is possible to feed the leading edge of the film out from inside the cartridge and engage the film pull-out mechanism inside the camera. Along with this, it is no longer necessary to pull out the end of the film from the outside of the cartridge in advance, and therefore there is no need to set the end of the film in the film pull-out mechanism inside the camera, making it easier to load the cartridge into the camera than before. It also becomes easier.

The present invention has been made in view of this point, and it is an object of the present invention to provide a photographic film cartridge that can automatically feed photographic film from the inside of the cartridge to the outside using a mechanism inside the camera.

[Means to solve the problem]

In order to achieve this object, in the photographic film cartridge according to the present invention, the photographic film is tightly wound around the spool along a flange formed on the spool, and the outermost circumference of the rolled photographic film is The photographic film is characterized in that at least in one location the photographic film is secured to the flange of the spool by a readily removable locking means.

There are various types of locking means.

One end is joined to a notch formed in the flange of the spool, and the film is wound into a roll so that it can swing around the joined end on a plane perpendicular to the direction in which the photographic film is pulled out. This is a pressing member that presses the outermost periphery of the photographic film that has been pulled out, and is located within the notch when the photographic film is pulled out.

In addition, there is also a bonding member that can be cut by a force exceeding a predetermined value, in particular an adhesive tape that has a cut at least in part from the photographic film outlet side along the boundary line between the flange of the spool and the photographic film. be.

Furthermore, it is possible to use a locking means consisting of a locking piece formed so that a part of the flange of the spool is bent in the direction of the rolled photographic film, and two protrusions provided inside the cartridge body. You can also do it. The locking piece in this locking means spools the photographic film! After being tightly rolled, it is bent in the direction of the photographic film and engaged with the outermost periphery of the photographic film wound into a roll. At least one of a protrusion provided inside the cartridge main body continuously with the cassette body, or a protrusion provided on the inner surface of the cassette main body at a position where the photographic film separates from the roll of photographic film when the photographic film is pulled out. It only needs to be one, and when the spool is rotated in the direction of pulling out the photographic film, it engages with the locking piece and bends the locking piece so that it is substantially flush with the flange.

[Effect]

According to the above structure of the present invention, the photographic film is held tightly wound on the spool by the locking means. Therefore, if you rotate the spool in the opposite direction to the film winding direction using a mechanism inside the camera, you can move the photographic film outside the cartridge. A force acts on the photographic film in the direction of feeding. The locking force of the locking means is not large, and by rotating the spool in the opposite direction, the locking between the photographic film and the flange of the spool by the locking means is released, and the photographic film can be sent out from inside the cartridge. can.

〔Example〕

1 to 5 show an example of a photographic film cartridge equipped with a locking means according to the present invention.

Photographic film cartridge 1 has spool 2, spool 2
It consists of a photographic film 3 wound into a roll and a cartridge main body 4 (not shown in each figure (a)). Is spool 2 B in cartridge body 4? : The cartridge main body 4 is arranged to be rotatable around an axis, and the cartridge main body 4 is provided with a photographic film drawer opening 5.

A light shielding member 5a is provided on the inner surface of the photographic film drawer opening 5 to maintain a light-tight state of the volume inside the cartridge main body 4. Further, the photographic film 3 is arranged with the leading end of the photographic film 3 aligned with the film drawer opening 5. A pair of flanges 6 are formed at both ends of the spool 2 and extend perpendicularly to the spool 2.
The photographic film 3 is tightly wound around the spool 2 between a pair of flanges 6 with the end face thereof along the flange 6. The photographic film 3 is secured to a pair of flanges 6 at the outermost periphery of the photographic film 3 wound into a roll with easily removable locking means.

FIGS. 1(a) to 1(6) show a photographic film cartridge 1 equipped with a pressing member 7 as a locking means.

The pressing member 7 is attached to the spool 2 as shown in FIG. 1(a).
One end 7a is joined to a notch 8 formed in the flange 6 of the flange 6, and positions A (position shown by a solid line) and position B shown in FIG.
(the position indicated by the broken line).

This pressing member 7 functions as follows. First, after the photographic film 3 is tightly wound around the spool 2, the pressing member 7 is swung to position A to press the outermost periphery of the photographic film 3 wound into a roll. Here, for example, the position shown in Fig. 1 et al. the photographic film 3 by the pressing member 7.
Suppose you press .

Next, when the spool 2 is rotated in the opposite direction to the film winding direction by a spool drive shaft (not shown) inside the camera, the pressing member 7 presses the photographic film 3 and moves together with the spool 2 as shown in FIG. 1(C). Rotate to the position shown.

Since the photographic film 3 is kept tightly wound around the spool 2 by the pressing member 7, the leading end of the photographic film 3 is sent out from the film outlet 5 to the outside of the cartridge body 4 as the spool 20 rotates. Figure 1 (C)
In the position shown in , the photographic film 3 is
This is the position I when leaving the camera and heading towards the film drawer opening 5. Since the pressing member 7 is rotating clockwise in the figure together with the spool 2, the pressing member 7 that has reached the same position I is pushed up by the photographic film 3 that has left the roll and is rotating.・For this reason, the pressing member 7 is
At the point when the photographic film 3 passes through the position shown in
The spool 2 is sprung up and swung to the desired position, and thereafter rotates together with the spool 2 while remaining at the spool 2. The leading end of the fed photographic film 3 engages with a film pull-out mechanism (not shown) within the camera and is guided to an exposure position and then to a film winding shaft.

When photography is completed, the spool 2 is rotated and the photographic film 3 is rewound. Since the pressing member 7 remains in position within the notch 8, the rewinding of the photographic film 3 is not hindered by the pressing member 7.

The shape of the pressing member 7 is not particularly limited to the flat shape as in this embodiment (any shape is sufficient as long as it can press the photographic film 3. Also, the material of the pressing member 7 :'i Basically, any material may be used, but in consideration of processability and other factors, resin is most preferable.

FIG. 2(a), ω) shows a photographic film cartridge 1 provided with an adhesive tape 10 among the connecting members as a locking means.

The adhesive tape 10 connects the outermost peripheral end of the rolled photographic film 3 and the side surface 6a of the flange 6. The adhesive tape 10 includes a side surface 6a of the flange 6.
A cut 11 is made along the boundary line between the film and the photographic film 3, and the film can be cut along this cut 11 by applying an appropriate force.

This adhesive tape 10 functions as follows.

After tightly winding the photographic film 3 around the spool 2, as shown in Figure 2 (
As shown in a), adhesive tape 10 is applied to fix photographic film 3 to flange 6. This keeps the photographic film 3 tightly wound around the spool 2. This adhesive tape 10 has a cut 11, so when the photographic film 3'' is pulled in the direction of pulling out the film 3, the adhesive tape 10 can be cut along the cut 11 with a slight force. can. Therefore, when the spool 2 is rotated in the opposite direction to the film winding direction by the spool drive shaft of the camera, the adhesive tape 10 is cut along the cut 11, and the leading edge of the film 3 can be sent out from the film outlet 5. can. After the leading edge of the film 3 is fed out of the cartridge main body 4, the process is the same as in the previous embodiment: the film pull-out mechanism (not shown) of the camera engages with the leading edge of the film 3, and the film 3 is removed.
bring out.

Since the cut adhesive tape 10 remains adhered to the end of the photographic film 3 and the side surface 6a of the flange 6, it does not interfere with the pulling out and rewinding of the photographic film 3.

Suitable materials for this adhesive tape 10 include paper, fiber, and plastic film. Furthermore, it is not necessary to insert the cut 11 over the entirety of the adhesive tape IO;
The film may be inserted only partially from the film drawer opening 5 side.

Furthermore, the connecting member as a locking means is not limited to the adhesive tape 10 as in this embodiment, as long as it can temporarily lock the photographic film 3 and the flange 6. Any coupling member may be used.

For example, it is within the scope of the present invention to temporarily lock the photographic film 3 and the flange 6 using an adhesive having weak adhesive strength.

3 to 5 show a photographic film cartridge 1 equipped with a locking means consisting of a locking piece 20 and a protrusion 21. As shown in FIGS.

As shown in FIGS. 3(a) and 3(b), the locking piece 20 is attached to a part of the flange 6 formed on the spool 2 in a direction substantially perpendicular to the direction in which the film 3 (indicated by the dashed line) is pulled out. Two approximately parallel cuts are made in the film, and the free end is formed so that it can be bent toward the photographic film 3 side. The protruding portion 21 is continuous with the lower surface 5b of the cartridge main body 4 that forms the film drawer opening 5, and is formed in a shape that projects into the interior of the cartridge main body 4. This protrusion 21 has a slope 21a facing toward the flange 6, and the slope 21a is located at a position i which is farther from the flange 6 as the distance on the vertical line from the spool 2 increases. It is located like there are two. The locking piece 20 formed on the flange 6 is directed in the direction in which the spool 2 pulls out the film 3 (clockwise in FIG. 3(a)).
! When rotated, it comes into contact with the slope 21H of the protrusion 21.

The locking means consisting of the locking piece 20 and the protrusion 21 operates as follows. After the photographic film 3 is tightly wound in a roll shape around a spool 2, the locking piece 20 is bent and brought into contact with the outermost circumference of the photographic film 3 wound in the roll shape, thereby preventing the winding of the photographic film 30 from loosening. Next, when the spool 2 is rotated in the opposite direction to the film winding direction by a spool drive shaft (not shown) inside the camera, the locking piece 20 presses the photographic film 3 and moves the protrusion 2 together with the spool 2.
Rotate until it comes into contact with the slope 21a of No. 1.

Since the photographic film 3 is kept tightly wound around the spool 2 by the locking piece 20, as the spool 20 rotates, the leading end of the photographic film 3 is sent out from the film outlet 5 to the outside of the cartridge main body 4.

A state in which the locking piece 20 is in contact with the slope 21a of the protrusion 21 is shown in FIG. 4(a). Even after the locking piece 20 contacts the slope 21a, the locking piece 20 is forcibly rotated counterclockwise in the figure by the rotation of the spool 20. The slope 21a is located such that an arbitrary point on the slope is located at a position farther from the flange 6 as the distance on the vertical line from the spool 2 increases. Therefore, as the locking piece 20 rotates counterclockwise, the locking piece 20 receives a force that pushes it back toward the flange 6 from the slope 21a. Therefore,
While the locking piece 20 rotates from the position shown in FIG. 4(a) to the position shown in FIG. From there, the shape changes to the shape shown at c in the same figure. That is, the locking piece 20 returns to its original position substantially in the same plane as the flange 6. Thereafter, the locking piece 20 rotates while remaining at this position, and does not interfere with the pulling out of the photographic film 3. In this case, there is a risk that the photographic film 3 will be caught between the locking piece 20 and the protrusion 21, but the locking piece 20 will be immediately moved to its original position on the same plane as the flange 6 by the protrusion 21. Rank! ! = Since it can be returned to its original position, the withdrawal of the photographic film 3 is not hindered. Further, even if the photographic film 3 is scratched, the portion of the photographic film 30 that is locked by the locking piece 20 is not an image portion, so it will not affect photographing.

After the leading edge of the film 3 is fed out of the cartridge main body 4, the film pull-out mechanism (not shown) inside the camera is used.
engages with the tip of the film 3, pulls out the film 3,
The film 3 is guided to the exposure position.

When photographing is completed, the spool 2 is rotated counterclockwise in FIG. 3(a) by the spool drive shaft of the camera, and the film 3 is rewound onto the spool 2. Since the locking piece 20 has returned to its original position in the same plane as the flange 6, rewinding of the film 30 is not hindered.

A modification of the above embodiment is shown in FIG. The protruding part 22 in this embodiment has the same shape as the protruding part 21 in the previous embodiment, and the cartridge main body is located at a position where the photographic film 3 is separated from the photographic film 30 roll when the photographic film 3 is pulled out. It is provided on the inner surface of 4. That is, in this embodiment, the protruding portion 22 extends from the lower surface of the photographic film 3 to the upper surface! = moved, and the position where the protrusion is provided is set to the position where the photographic film 3 is separated from the roll.

The protruding portion 22 in this embodiment is also the same as the protruding portion 22 in the previous embodiment.
It acts in the same way. That is, by pressing the photographic film 3, it is possible to feed the photographic film 3,
The locking piece 20 comes into contact with the slope 22a of the protrusion 22, and by continuing to rotate while in contact with it, the locking piece 20 is bent to a position in the same plane as the flange 6. Thereafter, the locking piece 20 rotates while remaining in that position, and does not interfere with the pulling out and rewinding of the film 3. In this embodiment, the protrusion 22
is provided on the upper surface of the photographic film 3, and since the photographic film 3 passes under the protrusion 22, there is no gap between the locking piece 20 and the protrusion 21 as in the previous embodiment. ;There is no risk of the photographic film 3 being caught.

In the above embodiment, a means for temporarily fixing the spool 2 to the cartridge main body 4 or a means for temporarily fixing the leading end of the film 3 in the film drawer 5 is provided. It is advantageous to leave it there. By providing such a means, it is possible to prevent the leading end of the film 3 from being drawn into the cartridge main body 4 due to user's erroneous operation. As this means, for example, there is a means of fixing the spool 2 and one of the annular side surfaces of the cartridge main body 4 with a thin seal. Since this seal can be cut by rotating the spool 2, it does not interfere with the feeding and rewinding of the film 3.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included within the scope of the present invention. .

For example, the flange 6 does not need to be formed on both ends of the spool 2; <, either end! Only two may be formed.

Further, in accordance with this, it is also possible to provide not only one but a plurality of locking means for each of the six flanges.

In the above embodiment, the leading end of the film 3 is arranged in line with the film outlet 5, but the leading end of the film 3 is not limited to this, and may be located in any position. however,
In order to reliably feed out the film 3, it is preferable that the leading end of the film 3 is located inside the film outlet 5. When the film 3 is disposed inside the film outlet 5, the location where the film 3 is locked to the flange 6 is from the point where the film 3 separates from the film 30 roll toward the film outlet 5 to the film outlet 5. It is preferable that the angle is at least 15 degrees or more, preferably 30 degrees or more and 180 degrees or less in the opposite direction.

〔Effect of the invention〕

With the photographic film cartridge of the present invention, photographic film can be automatically fed from the inside of the cartridge to the outside using only the mechanism inside the camera. Along with this, it is no longer necessary to pull out the end of the film in advance, and there is no longer a need for a modification to set the end of the film in the camera's film pull-out mechanism. becomes easier than

[Brief explanation of drawings]

Fig. 1(a) is a perspective view of the inside of a photographic film cartridge equipped with a pressing member as a locking means, Fig. 1(b), CC)
2 is a sectional view showing the swinging state of the pressing member, FIG. 2(d) is a schematic diagram showing the swinging position of the pressing member, and FIG. FIG. 3(a) is a perspective view of the inside of a photographic film cartridge equipped with a locking piece and a protrusion as a locking means, and FIG. 4(a) to 4(d) are schematic diagrams showing the state in which the locking piece is bent as the spool rotates, and FIG. 5(a) is a cross-sectional view showing the locking piece and the protrusion as the locking means. A perspective view of the interior of a modified example of the photographic film cartridge provided therein, and FIG. 7B is a cross-sectional view. [Explanation of symbols] 1... Photographic film cartridge 2... Spool 3
... Photographic film 4 ... Patrone body 5
...Film drawer opening 5a...Light shielding member 5b.
... Lower surface of film outlet 6 ... Flange, 5a ... 7 Lange side 7 ... Pressing part 7a ... Fixed end of pressing member 8 ... Notch 10 ... Adhesive tape 11 ... Cut 20 ... Locking piece 21.2
2... Projections 21a, 22a... Projection slopes (a) (C) Fig. 2 (a) (b) Fig. 1 (b) (d) Fig. 3 (a) h (b ) Figure 4 Figure 5 (a) (b) (a) (C) (d) (b)

Claims (5)

[Claims] (1) Consisting of a spool, a photographic film wound into a roll on this spool, and a cartridge main body, the spool is arranged inside the cartridge main body so as to be rotatable around an axis, and the cartridge main body is provided with light inside the cartridge main body. In a photographic film cartridge provided with a photographic film drawer opening that can maintain a tight state, the spool has a flange extending perpendicularly to the spool at at least one of both ends, and the photographic film is disposed along the flange of the spool. The photographic film is tightly wound around the spool, and the photographic film is secured to the flange of the spool at at least one location on the outermost periphery of the rolled photographic film using a locking means that is easily removable. A photographic film cartridge featuring the following. (2) The locking means has one end joined to a notch formed in the flange of the spool, and is swingable about the joined end on a plane perpendicular to the pulling direction of the photographic film. The photograph according to claim 1, wherein the photographic film is pressed against the outermost periphery of the photographic film tightly wound into a roll, and is located within the notch when the photographic film is pulled out. Film patrone. (3) The photographic film cartridge according to claim 1, wherein the locking means is a connecting member that can be cut by a force greater than a predetermined value. (4) The locking means is an adhesive tape having at least a portion cut from the photographic film drawer opening side along the boundary line between the flange of the spool and the photographic film. (1) or (
3) Photographic film cartridge as described. (5) The locking means may include a protrusion provided inside the cartridge main body continuously with the inner surface of the cartridge main body forming the photographic film draw-out opening, or a projecting portion provided inside the cartridge main body that forms the photographic film pull-out opening, or a protrusion that prevents the photographic film from being pulled out when the photographic film is pulled out. At least one of the protrusions provided on the inner surface of the cartridge main body at a position away from the roll of photographic film, and a part of the flange of the spool of the photographic film wound into a roll. and a locking piece formed to bend in the direction of the photographic film, and the locking piece is configured to bend the photographic film in the direction of the photographic film after the photographic film is tightly wound around the spool and wound into a roll. The projecting portion engages with the locking piece when the spool is rotated in a direction to pull out the photographic film, and the protruding portion engages with the locking piece when the spool is rotated in a direction to pull out the photographic film. 2. The photographic film cartridge according to claim 1, wherein the photographic film cartridge is bent so as to be substantially flush with the film cartridge.