JPS634205Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an easy loading device that automatically winds up a film leader inserted into a spool chamber onto a take-up spool in the spool chamber in conjunction with the winding operation.

In conventional cameras, the spool chamber is covered with an opaque spool chamber cover, leaving an opening for inserting the film leader into the spool chamber.
The cover restricts the direction in which the film leader is inserted into the spool chamber, and automatically winds the film leader inserted into the spool chamber onto a take-up spool disposed in the spool chamber in conjunction with the winding operation. Easy loading devices are known. However, in this conventional device, since the spool chamber cover is opaque as described above, it is not possible to confirm the state of the film leader section in the spool chamber. Therefore, even if the film is not properly inserted into the spool chamber, the winding operation may occur, and as a result, the film may not be able to be wound.

SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide an easy loading device which overcomes the above-mentioned drawbacks and makes it possible to check the state of the film leader within the spool chamber.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the embodiment as viewed from above. The camera body 1 is provided with a guide rail 2 that guides the film f from a cartridge chamber (not shown) on the left side, and at the end of this rail 2, it rotates counterclockwise in Figure 1 by winding operation. Sprocket 3 is arranged. The sprocket 3 has sprocket pawls 3a at its upper and lower ends for engaging with perforations p of the film f (see FIG. 3).

Next, a spool chamber cover 5 is rotatably supported on a rotating shaft 4 fixed to the camera body 1, and this cover 5 is urged clockwise in FIG. and is regulated in a fixed position.

On the other hand, a first film guide 7 is also rotatably supported on the rotating shaft 4, and the first film guide 7 is biased counterclockwise by the spring 6 and is moved by the take-up spool 8. are regulated. That is, the spring 6 is wound around the shaft 4, and one end of the spring 6 is applied to the cover 5, and the other end is applied to the guide 7, biasing both in opposite directions. The take-up spool 8 is a film f
It rotates counterclockwise in Figure 1 by winding operation to wind up the film, and its lower part, that is, the film f
Eight claws 8a are provided at equal intervals along the outer periphery at the same height as the perforation on the lower side (see FIG. 7). As shown in FIG. 1, the claw 8a has a shape that allows the perforation of the film to easily catch thereon. Tip 7a of guide 7
The surface facing the take-up spool 8 has a shape that follows the outer periphery of the take-up spool 8. Another rotary shaft 9 is fixed to the camera body 1 on the front side of the camera (upper side in FIG. 1) of the take-up spool 8, and a second film guide 10 is rotatably supported thereon. The second film guide 10 is biased counterclockwise in FIG.
Like the film guide 7, its movement is regulated by a spool 8. 2nd film guide 1
The surface of the tip 10a of the 0 on the side facing the take-up spool 8 has a shape that follows the outer periphery of the spool 8, similar to the guide 7. The tip of the tip 10a is the folded part 1
0b, and this folded portion 10b cooperates with the film guide 12 fixed to the camera body 1 to close the gap between the sprocket 3 and the spool 8, and prevent the leading edge of the film f from entering here. It has the function of preventing

As shown in FIG. 2, the camera body 1 has a back cover 1.
3, which can be opened and closed about a rotating shaft 14 fixed to the camera body 1. A roller 15 is attached to the back cover 13 to prevent the film f from lifting up from the sprocket pawl 3a when the back cover 13 is closed (the state shown in FIG. 2), and to ensure that the film f is fed. ing. Further, the back cover 13 is provided with a pressure plate 16 supported by a leaf spring (not shown).

Next, as shown in FIG. 3, the spool chamber cover 5 is opaque except for an opening 5a which is a transparent window, and in this embodiment, the opening 5a is a long hole as shown in the figure, It is provided at a position opposite to the lower end claw 8a of the spool.

Based on the above configuration, the operation of this embodiment will be explained with detailed explanations of some of the members. As shown in FIG. 1, with the back cover 13 open, the film f is inserted into the gap between the fixed film guide 12 and the spool chamber cover 5, and fed until the leading edge of the film f is above the take-up spool 8. Then, the film f is placed on the sprocket pawl 3a so that the perforation of the film f is bitten. Next, as shown in FIG. 2, close the back cover 13 (although the back cover 13 does not necessarily need to be closed, the case where it is closed will be described here). By closing the back cover 13, the roller 15 attached to the back cover 13 comes to the position shown in FIG. 2, which prevents the film f from floating up from the sprocket pawl 3a and allows the film to be fed reliably. By performing the winding operation, the film f is fed as shown in FIG. At this time, the circumferential speed of the take-up spool 8 is relative to the circumferential speed of the sprocket 3.
As is well known, the speed is 1.2 times or more in order to take up slack and to make it easier to hook the spool claw 8a to the perforation of the film f. Therefore,
If the perforation is immediately caught by the spool pawl 8a, the film f is pulled onto the spool 8, and if it is not caught, the film f is fed by the sprocket 3. The leading end of the film is guided by a first film guide 7, which has a guide leading end part 7 having a shape that follows the outer circumference of the spool.
a is pressed against the spool pawl 8a. With the winding operation, the perforation of the film f is hooked onto the spool claw 8a, and the film f is wound around the spool 8 by the guide 7 so as not to come off the spool claw 8a. 1st
The film f that has passed through the film guide 7 is then guided by a second film guide 10 as shown in FIG.

In the unlikely event that the perforation at the tip of the film that has passed the first film guide 7 is removed by the spool claw 8a.
Even if the film comes off from the spool claw 8, the leading edge of the film is moved back to the spool claw 8 by the second film guide 10.
It is pressed and hooked on a. In this way, the film f is reliably hooked onto the spool claw 8a by the two guides 7 and 10 and fed.

Here, the shapes of the guides 7 and 10 will be described.
The shape of the first film guide 7 is such that even when the film f is fed without being caught by the spool claw 8a,
The angle is set such that the leading edge of the curled film is guided to the outer circumference of the spool 8. Therefore,
No matter how the leading edge of the film enters, the leading edge of the film can always be guided to the outer periphery of the take-up spool. Further, the tip portion 7 of the first film guide 7
At any time, one of the claws 8a is in contact with the leading end 10a of the second film guide 10, and one claw 8a is in contact with the leading end 10a of the second film guide 10.
When they try to come off, the next claw 8a comes into contact with them. Therefore, the guides 7 and 10 do not swing, and the film winding feels smooth, and there is no change in the winding torque when the film is wound. Before a large amount of film f is wound onto the take-up spool 8, the tips of the film guides 7 and 10 are always supported by the tips of the claws of the take-up spool, and a rattling sound is generated when the take-up spool 8 rotates. There is no vibration and no vibration occurs. Furthermore, as shown in FIG. 7, the center portions (in the vertical direction) of the guides 7 and 10 are inflated to prevent scratches on the screen of the film f.
10 is adapted to come into contact with the tip of the spool pawl 8a and press the perforated portion from the outside in the direction of the arrow. Now, the film f is fed by the winding operation and wound around the spool 8 one after another. Film guides 7, 10 are springs 6, 11
The film guides 7 and 10 are finally opened near the inner wall of the spool chamber as shown in FIG.

Next, film loading when the back cover 13 is not closed will be explained. Is the film loading method and operation basically the same even when the back cover 13 is not closed?
As shown in FIG. 8, the film f is wound around the spool 8 by its own curling, and the film f is fed by the winding operation. At this time, in order to prevent the perforation of the film f from lifting up from the sprocket pawl 3a, place the film f in the cartridge chamber.
It is effective to attach the cartridge presser foot. That is, the method of feeding the film from the cartridge is regulated so that the film is fed along the guide rail 2. In this way, it is possible to prevent the film from lifting up, and the sprocket claw 3a
and perflation mesh together. The film can then be fed into the spool chamber by the winding operation.

Here, the spool chamber cover 5 will be further explained.

When loading the film, if there is no spool chamber cover 5, place the leading end of the film on the spool 8, and place the film f on the sprocket pawl 3a.
For example, as shown in Figure 9, if the film f is forced into the spool chamber in a direction perpendicular to the guide rail 2, it will pass through the second film guide 10. The film f comes into contact with the film f being fed into the spool chamber and moves in the direction of the arrow in FIG. 9, making it impossible to load the film. In order to prevent film loading failure due to an error in the loading method, it is necessary to regulate the film loading method and to ensure that the film f that has passed through the second film guide 10 is wound around the spool 8. This is the first reason for providing the cover 5.

To explain this further, FIG. 9 shows a case where there is no cover 5, whereas FIG.
By providing the cover 5 with a certain length as shown in the figure, the position where the film f enters the spool chamber is restricted by the tip of the cover 5. That is, the leading edge of the film f wound on the spool 8 comes out from the second film guide 10, but the leading edge of the emerging film contacts the film f entering the spool chamber, and the leading edge of the film is wound up again. The length of the spool chamber cover 5 is set so that it is guided over the outer circumference of the spool. In this way, the film f is reliably wound onto the take-up spool 8. At this time,
As can be seen from FIG. 10, the gap between the fixed film guide 12 and the cover 5 can be sufficiently wide, and the film f can be easily inserted.

The second reason for providing the cover 5 is to make the spool 8 and the guides 7, 10 invisible from the outside by the spool chamber cover 5, so as not to give unnecessary anxiety to the user. The purpose is to obtain a clean and neat appearance. As described above, the cover 5 is provided with the window 5a, which allows the user to check how the film leader was inserted into the spool chamber in an incorrect manner. You can check whether it has been done. Further, in this embodiment, the window 5a is used to indicate the amount of film insertion so that the film can be wound onto the take-up spool if the film is inserted so that the tip of the film leader is located within the range of the window 5a. I'm also doing it. In other words, the window portion is located at such a position. Further, as in the embodiment, the window portion 5
If a is provided on the cover 5 at a position facing the lower end side claw 8a of the take-up spool, the perforation of the film leader inserted into the spool chamber is engaged with the spool claw 8a during the winding operation. You can check whether or not. Mechanically, the spool chamber cover 5
By using the rotating shaft 4 and spring 6 of the film guide 7 in common and making effective use of a narrow space, the mechanism can be made compact and an increase in the number of parts can be prevented. The spool chamber cover 5 can be opened counterclockwise around the rotating shaft 4 as shown in FIG. 11, making it possible to clean dust such as film f residue accumulated in the spool chamber.

By the way, although the present invention has been described above with reference to the illustrated embodiment, it goes without saying that the present invention can be applied to any type of easy loading device provided with an opaque spool chamber cover.

As detailed above, according to the present invention, since a transparent window is provided in the opaque spool chamber cover,
While utilizing the advantages of the conventional fully opaque spool chamber cover, it is possible to overcome the disadvantages and confirm the film insertion state. In addition, the window part is the position range where the tip of the film leader part should be inserted into the spool chamber.
In other words, the film is sized to indicate the position range in which the film should be inserted in order to reliably wind the film. The winding operation allows the film to be reliably wound onto the take-up spool. That is, the window has the function of not only confirming the condition inside the spool chamber but also indicating the insertion position of the film leader.

[Brief explanation of drawings]

1 and 2 are top views of this embodiment for explaining the operation of the embodiment of the present invention, FIG. 3 is a front view of this embodiment, and FIGS. 4 to 6 are A view similar to FIGS. 1 and 2; FIG. 7 is a longitudinal sectional view illustrating the relationship between the spool, the film guide, and the film;
Figure 8 shows the state of the film at the beginning of winding when the camera back is not closed, and Figure 9 shows the state when the film is inserted longitudinally without the spool chamber cover. , FIG. 10 is a diagram explaining the function of the spool chamber cover, and FIG. 11 is a diagram showing the spool chamber cover in an open state. Explanation of symbols of main parts, 8... Winding spool,
5... Spool chamber cover, 5a... Window section, 8a...
...Take-up spool claw.

Claims (1)

[Claims for Utility Model Registration] A take-up spool, which is a cylindrical member rotatably disposed in a spool chamber and has a plurality of claws along the outer periphery of one end thereof that engage with the perforation of the film. an opaque spool chamber cover that covers the spool chamber and restricts the direction of insertion of the film leader into the spool chamber, leaving an opening for inserting the film leader into the spool chamber; An easy loading device with a spool chamber cover that automatically winds up a film leader inserted into the spool chamber through the take-up spool that rotates in conjunction with the film winding operation, wherein the spool chamber cover is transparent to the inside of the spool chamber. The window is located at a position opposite to the pawl of the take-up spool and defines a position range in which the tip of the film leader should be inserted into the spool chamber in order to ensure film winding. An easy loading device with a spool chamber cover, characterized in that it is formed in a specified size.