JPH0289038A - Auto loading device for film in camera - Google Patents

Abstract

PURPOSE:To make the camera small in size, light in weight and low in cost by providing an energizing means for energizing a spool toward a guide roller at the time of winding a film. CONSTITUTION:The title device is provided with an opening part for executing an exposure of a film 30, a guide roller 20 provided on a position separated from the opening part so as to be rotatable along the feed direction of the film 30, a cylindrical spool chamber 2 provided in front or in the rear of the opening part and the guide roller 20, and a planetary lever axis provided on the upper part and the lower part of the peripheral part of the spool chamber 2. Also, said device is provided with an energizing means having a planetary gear 16 on a planetary lever 18 provided so as to pass through about the center part of a circle of the spool chamber 2, and also, having one spool 17 provided coaxially or roughly coaxially with the planetary gear 16 so as to combine a feeding-in roller of the film 30 and a wind-tightening roller, and moreover, energizing the spool 17 toward the guide roller 20 at the time of winding the film. Accordingly, auto loading can be executed irrespective of whether a perforation exists or not. In such a way, the camera can be made light in weight and low in cost.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic film loading device for a camera, and more specifically, it relates to an automatic film loading device for a camera, and more specifically, it relates to an automatic film loading device for a camera. , relates to an auto-loading device that can be reeled in automatically.

[Prior art] Conventional automatic loading of perforated films involves sending the film to the spool chamber using a sprocket and winding the roll film around the spool using rubber friction, or using a spool instead of the rubber friction. There were some that wound the roll film tightly with the claws of the spool, and others that hooked the perforations on the claws of the spool and wound the film into the spool chamber.

And in modern cameras, the perforation only takes a fraction of a second to wind the film onto the spool, and only uses one or a dozen of the many perforation holes.
Eliminating perforation holes from roll film,
It is thought that it is possible to make cameras more compact and lightweight, and to save resources on film.In other words, a film without perforations has been proposed.
It is stated in the publication number etc. It has also been proposed to use a roller coated with a material with high friction, such as rubber, as a means for feeding a perforated film without holes.

[Problems to be Solved by the Invention] As mentioned above, roll films without perforations do not require perforation holes outside the screen, and as a film, this reduces production and cost issues. Although it has many advantages, in the conventional technology, it is necessary to provide at least a separate roller mechanism for automatically feeding the film and a roller mechanism for automatically winding the film. In addition, many parts attached to these components are required, which increases the size of the camera, making it impossible to reduce the weight and cost of the camera.

The present invention attempts to solve the above problems. In other words, the present invention enables automatic loading of not only roll films with part-overlays but also roll films without perforations, and enables cameras to be made smaller, lighter, and lower in cost. The object of the present invention is to provide an automatic film loading device for a camera.

[Li! Means for Solving the Problem] In order to achieve the above object, the film autoloading device in the camera of the present invention includes an opening for exposing the film, and an opening for rotating the film along the film feeding direction. a guide roller provided at a position away from the opening, a cylindrical spool chamber provided in front or behind the opening and the guide roller, and a planetary lever shaft provided above and below the periphery of the spool chamber. and a planetary gear on a planetary lever provided so as to pass through approximately the center of the circle of the spool chamber, and coaxially or approximately coaxially with the planetary gear so that the film is fed in and rolled and tightened. It has one spool provided so as to serve as a roller, and is further provided with a biasing means for biasing the spool toward the guide roller when winding up the film.

[Function] According to the present invention, one spool is arranged at a planetary position of a planetary gear mechanism that swings within a cylindrical spool chamber, and
Since a biasing means is provided for biasing the spool toward the guide roller during film winding, autoloading begins at the edge of the spool chamber and moves toward the center as the film is wound. Therefore, one spool serves two functions: pushing the leading end of the film into the spool chamber, which is an autoloading element, and winding the film onto the spool.

[Example] FIG. 1 is a plan view showing a first embodiment of the present invention.

In Figure 1, 1 is the patrone room, 2 is the spool room, and 3 is the patrone room.
is the surface of the film where the film can be exposed. Reference numeral 4 denotes a film feeding motor, which is decelerated by a pinion 5, a first wheel 6, and a second gear 7, and is oscillated by changing the rotation of the motor 4 in order to wind up or rewind through an idler 8. Sun gear 9 for the first planet, planet gear 1G
connected to. When the motor 4 rotates counterclockwise, the planetary gear lO and the planetary lever 11 also rotate counterclockwise, coupling the planetary gear 10 to the idler 12. The idler 12 transmits force to the idler l3 and the spool sun gear 14 of the spool planetary mechanism, and the idler 1 for the spool
5 to the planetary gear 16 for the spool.

Therefore, when the motor 4 rotates counterclockwise, the spool planetary gear 16 also rotates counterclockwise.

The spool planetary gear 16 has a spool 17 that rotates integrally or coaxially with the spool planetary gear 16, and both are arranged on a spool lever 18 concentric with the spool sun gear 14 of the spool planetary mechanism to perform planetary motion. Let's do it.

The spool planetary lever 18 has a spool planetary spring 19 that biases it clockwise.
7 is pressed against a guide roller 20 whose rotation center is on a line that is substantially an extension of the film surface 3. Reference numeral 21 denotes a release lever, which rotates clockwise when the back cover (not shown) is opened, overcomes the spool planetary spring 19, and rotates the spool planetary lever 18 clockwise. This lever 21 has a spring portion 21a, and a film is wound around the spool 17, which absorbs the stroke when the spool planetary lever 18 cannot rotate.

22 is a rewinding idle gear. When the motor 4 rotates clockwise, the sun gear 9 of the first planetary mechanism rotates clockwise, causing the planetary gear IO to planetically move clockwise, thereby meshing with the idle gear 22. The idle gear 22 is connected to a rewinding fork gear 23, and rotates the patrone spool counterclockwise via a fork (not shown) (integrated with the fork gear 23).
Wind the film.

At this time, the film is attached to the spool 17 and the guide roller 20.
Since the spool 17 is sandwiched between the spools 17 and 17 and can rotate freely, the spool 17 can be rotated without much force by being pulled out, and rewinding can be easily performed. .

In FIG. 1, 24 is a battery, 25 is a second field lens of the finder system, and 26 is an eyepiece lens.

Figures 2 to 5 show the second embodiment of the present invention.
The figure shows the film being fed in, Figure 4 the film being wound up, and Figure 5 the film being rolled up. FIG. 6 also shows a cross section of the spool.

In FIG. 2, the spool 17 is moved to the guide roller 20.
The biasing means for pressing against the surface is different from that shown in FIG. 1. In other words, the planetary lever for the spool! At 8, there is a biasing lever 27 which is directly applied with a biasing force by a spring and is rotated clockwise by opening the back cover, and rotatable counterclockwise by closing the back cover.
A biasing spring 28 is applied to this, and when the back cover is closed and it is desired to wind up the film, the spool 17 is biased against the guide roller 20. FIG. 2 shows the film cartridge 29 from the back side of the page with the back cover (not shown) opened.
When the film 30 is inserted, the leading end 30a of the film 30 is pushed into the gap between the spool 17 and the guide roller 20. At this time, the planetary gear 10 of the first planetary mechanism is placed on the rewinding side or at the neutral point. The spool planetary mechanism connects the idler 12 with the planetary gear 10.6<
Since they are not meshed, both the planetary motion (rotation around the axis of the spool sun gear 14) and the rotation of the spool 17 can be performed freely, and just by pushing with a weak force, the spool 17 can be made to make a planetary motion. It has become.

FIG. 3 shows the initial state of autoloading, and by closing the back cover from the state shown in FIG.
7 is pressed against the guide roller 20 by the action of the spool planetary mechanism.

Further, by causing the motor to rotate counterclockwise, the planetary gear lO meshes with the idler 12, causing the spool 17 to rotate counterclockwise.

As shown in FIG. 6, the spool 17 is wrapped with a friction rubber 17a, and in the first embodiment (FIG. 1), the force of the planetary spring 19 for the spool is different from the force of the planetary spring 19 in the second embodiment (FIG. 2). In Fig. 3), the film 30 is pressed against the film 30 by the force of the biasing spring 28, and the film tip fli 30a is fed along the inner circumference of the spool chamber 2 by the rotational movement of the motor 4 and the friction of the rubber. 2
After going around the inner circumference, the tightening operation shown in Fig. 4 begins.

The tightening shown in FIG. 4 is achieved because the friction between the films is small and the friction between the film and the friction rubber 17a of the spool 17 is large, and the film tip 30a is tightened to the outer circumference of the spool 17. To go.

FIG. 5 shows the state where tightening has been performed and a steady state has been reached.

FIG. 7 is a plan view showing a third embodiment of the present invention.

This third embodiment is an embodiment in which the biasing force for pressing the spool 17 against the guide roller 20 is not a spring but a friction provided on a planetary gear or a sun gear. The gear 51 has two gears, and the planetary gear 51
A friction washer 54 is arranged between the planetary lever 53 and the planetary lever 53, so that the spool 17 is pressed against the guide roller 20 by rotational force.

At this time, the idler 55 that meshes with the planetary gear lO of the first tIM mechanism directly meshes with the sun gear 50 of the planetary mechanism of the spool 17.

In the case of this friction-type planetary mechanism, it is necessary to take measures against shocks such as drops, so the anti-shock lever 56 is biased with a weak spring 57, and the diving claw 56a of the defense lever 56 is provided on the planetary lever 53. A stopper 58 is provided so as to be placed very close to the stopper 53a, and a weight portion is provided so that the center of gravity at the center of the shaft 59 of the anti-shock lever 56 is almost opposite to the center of gravity of the planetary mechanism at the center of the shaft 60 of the planetary lever 53. 56b
is provided, and as soon as the planetary mechanism attempts to rotate counterclockwise due to an impact, the diving claws 56a jump into the saw teeth 53a to prevent abnormal film feeding.

In the case of a planet with three gears, the first planet can be separated,
The spool 17 is free to rotate, and even if the planetary mechanism operates due to impact, the film will not be fed.

FIG. 8 is a plan view showing a fourth embodiment of the present invention.

This fourth embodiment is applied to a sequential-winding camera, in which the width is the same size as a normal camera.

FIG. 9 is a perspective view of FIG. 1, in which the winding system of the present invention is attached to a camera with a zoom lens. The motor 4, the first gear 6, and the second gear 7 are placed under the finder, and the idler 8, the sun gear 9 of the first planetary mechanism, and the planetary gear 10 are combined with a two-degree imaging type finder constituted by a lens 105. The winding gear is placed on the side, and the idlers 12 and 13 are placed above and around the viewfinder to make the camera more compact.

[Effects of the Invention] As explained above, according to the present invention, one spool is disposed at the ti star position of the free wheel mechanism that swings in a cylindrical spool chamber, and when the film is wound up, the spool is Since a biasing means is provided for biasing the spool toward the guide roller, autoloading starts at the edge of the spool chamber, and as the spool is wound up, it moves toward the center. Therefore, one spool serves the two functions of pushing the leading edge of the autoloading film into the spool chamber and winding it around the spool. Of course, automatic loading is also possible for films without perforations, and is particularly effective as a basic technology for eliminating film perforations in the future.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the first embodiment of the present invention, Fig. 2 is a plan view showing the second embodiment of the invention with the film loaded, and Fig. 3 is the same with the film being fed. FIG. 4 is a plan view showing the state in which the film is wound tightly, FIG. 5 is a plan view showing the state in which the film is wound, and FIG. 2 is a cross-sectional elevational view of the spool, FIG. 7 is a plan view showing the third embodiment of the present invention, FIG. 8 is a plan view similarly showing the fourth embodiment, and FIG. 9 is the same as that in FIG. It is an exploded perspective view. 1... Patrone room 2... Spool room 3.
... Film surface 4 ... Motor 14 ... Sun gear for spool 15 ... Idler for spool 16 ... T1 star gear for spool 17 ... Spool 18 ... Planetary lever for spool 19 ... Planetary spring for spool

Claims (1)

[Claims] 1. An opening for exposing the film, a guide roller rotatably provided at a position away from the opening along the film feeding direction, and a circular or cylindrical shape provided near the guide roller. It has a spool chamber, a shaft of a planetary lever provided around the periphery of the spool chamber, and a planetary gear on the planetary lever provided so as to pass through approximately the center of a circle of the spool chamber, and It has one spool that is substantially coaxial with the axis of the planetary gear and is provided so as to serve as a feed roller and a winding roller for the film, and when winding the film, the spool is connected to the guide roller. 1. An automatic film loading device for a camera, comprising a biasing means for biasing toward the camera.