JPH02154240A - Camera - Google Patents

Abstract

PURPOSE:To easily and speedily perform a film magazine loading work carried out by opening a back lid and a film drawing work by making it possible that a rewinding gear or the driving gear of the rewinding gear is engaged with a spool gear or the rewinding gear only at the time of a rewinding operation. CONSTITUTION:A terminal gear 181 is pivotally supported on the free edge side of a planetary lever 183 which is turned around the center shaft of a sun gear 182 adjacent to the terminal gear 181. The planetary lever 183 is turned and energized in a direction separated from the rewinding gear 12 by an weak spring 184. Ordinarily, the terminal gear (a planetary gear) 181 is separated from the rewinding gear 12 by the action of the spring 184 and abuts on a stopper pin 185. At the time of rewinding, the terminal gear 181 is moved against the spring 184 in a direction same as the sun gear 182 correspondingly to the rotation of the sun gear 182 and engaged with the rewinding gear 12. Thus, when the back lid is opened and the film magazine 2 is loaded, the rewinding gear 12 is lightly turned and the loading work is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a camera that can accommodate a film magazine having a spool gear.

[Conventional technology]

-m, this type of camera is equipped with a rewind gear that can mesh with the spool gear in the loading chamber when a film magazine is loaded into the camera body. This rewind gear is designed to transmit power from the drive source only when rewinding the exposed film into the magazine. It is designed to be disconnected from the drive source when it is pulled out to connect to a reel and when the film is wound up each time a photograph is taken.

[Problem to be solved by the invention]

However, even in cases other than the above-mentioned rewinding, the rewinding gear meshes with a plurality of gears. Therefore, the rewind gear did not rotate smoothly when the spool gear engaged when loading the film magazine, and not only did it have a bad feeling as if it was being forced in, but also the leading end of the film was connected to the winding wheel after loading. It also became heavy when pulling out the film.

This invention is intended to solve the above problems.
To provide a camera in which the loading feeling of a film magazine is good and the leading end of the film can be easily pulled out.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a camera equipped with a rewind gear in which a spool gear engages in a film magazine loading chamber, in which the rewind gear or the drive gear of the rewind gear is connected to the spool gear only during rewinding. Alternatively, it is configured so that it can mesh with the rewind gear, so that the rewind gear does not get in the way when loading a film magazine.

〔Example〕

Next, the present invention will be described based on an embodiment shown in the accompanying drawings.

1 is a perspective view of the camera body as seen from the back, FIG. 2 is a perspective view of the film magazine, and FIG. 3 is a perspective view of the spool. In FIG. 6, 1 is the camera body and 2 is the film magazine. The camera body 1 has an exposure frame 3 in the center, a loading chamber 4 for a film magazine 2 on the left side, and a film winding chamber 5 on the right side. Reference numeral 6 denotes a hoisting wheel pivotally supported within the hoisting chamber 5.

The film magazine 2 includes opposing side walls 2a and 2b molded from synthetic resin and a cylindrical wall 2c.
, 2b are provided with a hole 8 in the center thereof through which both ends of the spool 7 can be mounted, and an outlet 2d for the film 9 wound around the spool 7 is provided in the cylindrical wall 2c. The film magazine 2 shown here can be divided into two along a line 10 passing through the center of the hole 8 in order to facilitate storage and removal of the spool 7. It goes without saying that the film magazine 2 has perfect light-shielding performance at the outlet 2d, hole 8, etc., and is constructed to prevent outside light from entering.

The spool 7 is integrally equipped with a gear 11 at its shaft end. In this embodiment, the spool gear 11 is exposed on the outside of the side walls 2a and 2b of the film magazine 2, and is adapted to mesh with a rewind gear 12 provided in the magazine loading chamber 4. , the cylindrical wall 2
There is also a type that can be engaged with the rewinding gear 12 through a notched groove (not shown) provided in c. In the case of this type, a special light-shielding means is used to prevent the film from being exposed even if external light enters the magazine through the notched groove, for example, a step is provided on the inner surface of the spool collar, and a part of the leader of the film is provided on this step. Of course, it is possible to wrap light-shielding paper to block light.

4 and 5 show a drive transmission mechanism for the rewinding gear 12 and the winding reel 6. FIG. A drive source (motor) 13 of this drive transmission mechanism is provided within the winding reel 6. The drive source 13 normally operates in conjunction with the shutter button 14 when the shutter button 14 is pressed, and its power is provided by the fourth drive source 13.
First gear train 15 → switching mechanism 16 connected as shown in the figure
→It is transmitted to the winding reel 6 via the second gear train 17.

On the other hand, when the switching mechanism 16 is switched to the rewinding side by operating a switching lever (not shown), the first gear train 15 → switching mechanism 16 → third gear train 18 → rewinding gear 12 as shown in the fifth figure.
→ As shown in the spool gear 11 (linked to each other, the film 9 wound on the winding wheel 6 is rewound to the spool 7 in the film magazine 2. 20 is the perforage controller 19 of the film 9). It is a sprocket that meshes with the shutter, and functions to count the number of shots, charge the shutter, etc.

The terminal gear 181 of the third gear train 18 is configured to mesh with the rewinding gear 12 only during rewinding. That is,
Terminal gear 181 is adjacent to gear (sun gear) 18
A planetary lever 183 that rotates around the central axis 182' of 2
It is pivotally supported on the free end side of. The planetary lever 183 is urged to rotate in a direction away from the rewinding gear 12 by a weak spring 184, and normally (in a state where the power of the drive source 13 is not transmitted to the third gear train 18 as shown in the fourth figure), The terminal gear (planetary gear) 181 is separated from the rewinding gear 12 by the action of the spring 184 and is in contact with the stopper pin 185, but during rewinding (the state shown in the fifth figure), the terminal gear 181
moves against the spring 184 in the same direction (arrow) as the sun gear 182 rotates, and meshes with the rewinding gear 12 (see FIG. 6(a)), that is, the terminal gear ( Since the drive gear 181 of the rewind gear 12 escapes from the rewind gear 12 except during rewinding, the rewind gear 12 rotates lightly when the back cover 22 is opened and the film magazine 2 is loaded.
This not only makes the loading work easier, but also makes it possible to smoothly pull out the film after loading.

In the above embodiment, the terminal gear that drives the rewinding gear 12 is pivotally supported on the planetary lever, and is configured so that it can mesh with the rewinding gear only during rewinding. Similarly, the rewinding gear 12 may be used as a planetary gear. That is, the planetary lever 183, which rotates around the central axis 18bi of the terminal gear 181 of the third gear train 18, is pivotally supported on the free end side, and the film magazine 2 is supported only during rewinding (see FIG. Of course, it may be possible to mesh with the spool gear 11 of.

〔Effect of the invention〕

As described above, the present invention provides a camera equipped with a rewind gear that engages with a spool gear in a film magazine loading chamber, in which the rewind gear or the drive gear of the rewind gear is connected to the spool gear or the rewind gear only during rewinding. Since it is characterized by being configured so that it can be engaged with the back cover, it has the excellent effect that loading the film magazine and pulling out the film can be easily and quickly performed by opening the back cover.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a perspective view of the camera body as seen from the back, Fig. 2 is a perspective view of the film magazine, Fig. 3 is a perspective view of the spool, and Fig. 4 is a perspective view of the camera body. Fifth
The figure is a perspective view showing the drive transmission mechanism of the rewinding gear and the winding reel, and FIG. 6 is a partial sectional view with the back cover closed. - Camera body 2 - Film magazine 4 - Magazine loading chamber 5 - Film winding chamber 6 - Winding reel 7 - Spool 11 - Spool gear 12 - Rewinding gear 13 - Drive Source 15--First gear train 16--Switching mechanism 7--Second gear train 8--Third gear train 81--One terminal gear (drive gear for rewinding gear) 2--Back cover Fig. 1

Claims (1)

[Claims] In a camera equipped with a rewind gear that meshes with a spool gear in a film magazine loading chamber, the rewind gear or the drive gear of the rewind gear is configured to mesh with the spool gear or the rewind gear only during rewinding. A camera characterized by: