JPH041626A - camera - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to an improvement in a camera that uses a film cartridge containing all of the film.

(Background of the Invention) Conventionally, in this type of camera, driving force is transmitted from a feeding motor on the camera body side to a loaded film cartridge, as described in, for example, U.S. Pat. No. 4,841,319. A fork having a cap-toothed gear part provided at the bottom of the back cover that forms a part of the cartridge case engaged with the cartridge; and a fork drive having a cap-tooth gear part provided on the camera body side and connected to the feed motor. This was done by meshing the gears.

However, in cameras with the above configuration, the back cover is opened from the back of the camera when loading a film cartridge, and at this time, the fork provided at the bottom of the back cover and the fork drive gear are separated. Because it was configured as follows, it had the following problems.

In other words, when the back cover is opened, the fork and the fork drive gear are separated, and when the film cartridge loading is completed and the back cover is closed, these gears are engaged again and the output of the feeding motor is transferred to the film cartridge. Because of this structure, when the fork and the fork drive gear mesh, the teeth of these gears do not mesh well, causing problems such as the teeth colliding with each other and damaging the teeth. there were.

(Object of the Invention) An object of the present invention is to provide a camera that solves the above-mentioned problems and can prevent damage or wear to the Toyosaka gear portion of the fork and the fork drive gear.

(Features of the Invention) In order to achieve the above object, the present invention sets the opening/closing axis of the cartridge storage lid to be coaxial with the rotational axis of the fork drive gear, so that when the cartridge storage lid is opened/closed, the fork The Toyosaka gear part is configured to rotate on the fork driving gear so that the Toyosaka gear part of the fork and the fork driving gear do not become disengaged.

(Embodiment of the Invention) FIGS. 1 to 4 show an embodiment of the present invention. In these figures, 1 is a camera cover, 2 is a camera body,
3 is a film cartridge that stores all of the film;
4 is a finder.

Reference numeral 5 designates a back cover that forms part of the cartridge case, and when the film cartridge 3 is loaded, it is opened to a position where it abuts against a stopper 1a, with the center of rotation being a shaft 8, which will be described later. 6 is an opening/closing knob equipped with a lock claw (not shown) that locks the engaging claw portion 5a of the back cover 5 when the back cover 5 is closed; 7 is rubber for covering the gap; 8 is made of Toyosaka gear. This is a shaft fixed to the fork driving gear 10, and the back cover 5 is rotatably supported on the shaft 8. 9 is the camera cover 1.
It is a fork that is rotatably incorporated into the bottom of the back cover 5, which together with the camera body 2 constitutes a cartridge case.
It has a fork portion 9a that engages with the feed spool 3a for pushing out and taking in the film of the film cartridge 3, and a beveled portion 9b that is always in mesh with the fork driving gear 10. Reference numeral 11 denotes a spring that always biases the fork drive gear 10 in the left direction in FIG. It looks like this.

In the above configuration, the loading of the film cartridge 3 will be described.

When loading the film cartridge 3, the back cover 5 is
As shown in the figure, it is opened until it comes into contact with the stopper 1a.

At this time, since the back cover 5 rotates around the shaft 8, the meshing state between the fork drive gear 10 and the cap teeth 9b of the fork 9 is maintained, and the clockwise rotation of the back cover 5 Accordingly, the fork tooth portion 9b rotates on the fork driving gear 10 in the same direction. At this time, the fork drive gear 10 does not rotate because it is directly connected to the feed motor (not shown) via a reduction system (not shown).

In the above state, the film cartridge 3 is loaded (see FIG. 1), so that its feed spool 3a engages with the fork portion 9a of the fork 9.

Thereafter, the back cover 5 is closed, but at this time, contrary to the above, the back cover 5 rotates counterclockwise around the shaft 8, and as a result, the cap teeth 9b of the fork are in a non-rotatable state. They will rotate in the same direction on the drive gear 10. In this case as well, the fork drive gear 10 and the fork toothed portion 9 of the fork 9 are similar to those described above.
The state of engagement with b remains maintained. And back cover 5
When the camera body 2 abuts against the abutment part 2a of the camera body 2, the engaging claw part 5a of the back cover 5 engages with the locking claw of the opening/closing knob 6, and the closing operation of the back cover 5, in other words, the film cartridge The loading operation of step 3 is completed. FIG. 5 is a diagram showing this state (however, the film cartridge 3 is omitted here).

After this, known autoloading is started. That is, the output of the feed motor is transmitted to the fork drive gear 10 via a reduction system (not shown), and this rotational force is transmitted to the film cartridge feed spool 3 via the fork 9.
A predetermined number of frames of film are extruded.

According to this embodiment, since the back cover 5 is configured to be opened and closed around the rotation axis of the fork drive gear 10, that is, the shaft 8, the fork toothed portion 9b of the fork 9 and the fork drive gear 10 will not come out of engagement, and the teeth will not chip or wear out due to the teeth colliding with each other when the back cover is closed, as was the case in the past. It is now possible to close the door quietly without making any noise.

(Effects of the Invention) As explained above, according to the present invention, the opening/closing axis of the cartridge storage lid is set coaxially with the rotational axis of the fork drive gear, so that when the cartridge storage lid is opened/closed, the fork is rotated. The cap gear part of the fork rotates on the fork drive gear so that the fork gear part and the fork drive gear do not become disengaged. This makes it possible to prevent damage or wear.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a camera showing one embodiment of the present invention;
3 is a longitudinal sectional view when the film cartridge is loaded, FIG. 3 is a longitudinal sectional view when the film cartridge is completely loaded, and FIG. 4 is a longitudinal sectional view showing the state in which the fork driving gear and the fork are engaged. 3... Film cartridge, 5...
Back cover, 8...Shaft, 9...Fork, 1
0... Fork drive gear.

Claims (1)

[Claims] (1) A cartridge storage lid that opens and closes when loading a film cartridge containing all of the film, a fork with a bevel gear located on the cartridge storage lid, and a connection to a drive source for film feeding. A camera comprising a fork drive gear that meshes with the beveled gear portion, wherein an opening/closing axis of the cartridge storage lid is set coaxially with a rotation axis of the fork drive gear. .