JPH02154243A - 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 mounting an idler gear which communicates a rewinding gear with a driving source on the inner surface of the back lid of a camera main body. CONSTITUTION:In a camera provided with the rewinding gear 12 engaged with a spool gear 11 in a film magazine loading chamber, the shaft 19' of the idler gear 19 is subjected to bearing with the ellipse bearing hole 24 of a bracket 23 mounted on the inner surface of the back lid 22 of the camera main body 1. In the bearing hole 24, the shaft 19' is pressed in a direction in which the idler gear 19 is engaged with both the terminal gear 18' of a third gear string 18 and the rewinding gear 12 by a spring. Therefore, in a condition in which the back lid 22 is closed, the driving source 13 and the rewinding gear 12 are communicated with each other. When the back lid 22 is opened, the rewinding gear 12 is perfectly insulated from the third gear string 18. That is, the rewinding gear 12 is lightly turned when it is engaged with the spool gear 11 at the time of loading a film magazine 2. Thus 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]

Generally, this type of camera includes a rewind gear in the loading chamber that can mesh with a spool gear when a film magazine is loaded into the camera body. This rewind gear is designed to transmit the power from the drive source only when rewinding the photographed film into the magazine. It is designed to be disconnected from the drive source when it is pulled out to connect to the camera, and when the film is wound and closed for each shot.

[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 does not rotate smoothly when the spool gear engages when loading the film magazine, and not only does it have a bad feeling as if it is being forced in, but also the leading end of the film cannot be connected to the take-up reel after loading. Because of this, it was also 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]

To achieve the above object, the present invention provides a camera equipped with a rewind gear that meshes with a spool gear in a film magazine loading chamber, and an idler gear that connects the rewind gear to a drive source on the inner surface of the back cover of the camera body. When the back cover is opened when loading a film magazine, the rewind gear can rotate freely on its own.

〔Example〕

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

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, and FIG. 3 is a perspective view of the spool. In the figure, 1 is a camera body, and 2 is a film magazine. A 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 is 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, 2b of the film magazine 2, and meshes with the rewind gear 12 provided in the magazine loading chamber 4. There, that cylindrical wall 2
There is also a type that can mesh with the rewinding gear 12 through a notched groove (not shown) provided at 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 from the notch groove, for example, a step is provided on the inner surface of the spool collar, and a step is provided on a part of the league of the film. 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.
As shown in the diagram, the first gear train 15 is connected → the switching machine side 16
→It is transmitted to the hoisting wheel 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), as shown in the fifth figure, the first gear train 15 → switching mechanism 16 → third gear train 18 → idler gear 19 → winding Return gear 12 → spool gear 1! The film 9 wound on the take-up reel 6 is rewound onto the spool 7 in the film magazine 2. Note that 2o is a sprocket that meshes with the perforation 21' of the film 9, and functions to count the number of sheets, charge the shutter, etc.

As shown in FIG. 1, the shaft 19' of the idler gear 19 is attached to a bracket 2 provided on the inner surface of the back cover 22 of the camera body l.
The bearing is held in an oval bearing hole 24 of No. 3. This bearing hole 2
4, the shaft 19' is pressed by a spring 25 in the direction of meshing with both the terminal gear 18' of the third gear train 18 and the rewinding gear 12. Therefore, as shown in FIG. 6, when the KM 22 is closed, the drive source 13 and the rewinding gear 12 are connected, and when the back cover 22 is opened, the rewinding gear 12 is completely insulated from the third gear train 18. That is, since the rewinding gear 12 rotates lightly when the spool gear 11 is engaged when loading the film magazine 2, it not only facilitates the loading operation but also smoothes the withdrawal of the film after loading.

[Effects of the Invention] As described above, in a camera equipped with a rewind gear that meshes with a spool gear in a film magazine loading chamber, the idler gear that connects the rewind gear to a drive source is connected to the inner surface of the IIM of the camera body. When the back cover is opened, the rewinding gear is completely isolated from the terminal gear of the gear train connected to the drive source. Therefore, the film magazine loading operation and the film extraction operation performed by opening the back cover can be performed easily and quickly, which is an excellent effect.

[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. 1...-Camera body 2...Film magazine 4--Magazine loading chamber 5-Film winding chamber 6--Hoisting reel 7--Spool 11...Spool gear 12---Rewinding gear 3- - Drive source 5 - First gear train 6 - Switching mechanism 7 - Second gear train 8 - Third gear train 9 - Idler gear 2 - Back cover

Claims (1)

[Claims] A camera equipped with a rewind gear that meshes with a spool gear in a film magazine loading chamber, characterized in that an idler gear for connecting the rewind gear to a drive source is attached to the inner surface of the back cover of the camera body.