JPS6226745Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a film cartridge mounting device for a camera, and more particularly to a film cartridge mounting device for removably loading a film cartridge into a predetermined position within a camera.

Conventionally, in order to removably attach a film cartridge to the film supply chamber of a camera, the first
As shown in FIG. A, the camera's film rewind shaft 3, which is used to rotate the film take-up shaft 2 of the film cartridge 1 during film rewinding, is operated by an integrated rewind operation knob 4. After sliding it in the axial direction of arrow a and pulling it up, attach the film cartridge 1 to the film supply chamber 5, and then
As shown in the figure, the rewind operation knob 4 is returned to its original position, the rewind shaft 3 is lowered in the direction of arrow b, and the fork portion at the tip thereof is fitted into the protrusion of the film winding shaft 2. When taking out the film cartridge 1, it was done in the same way. However, with such a cartridge attachment/detachment means, it is relatively troublesome to attach/detach the film cartridge 1, and the rewind shaft 3 passes through the camera body.
Since it moves in the axial direction, it is unsuitable for waterproof cameras and the like. Note that if an O-ring or the like is used for the rewinding shaft 3 in consideration of waterproofness, the coaxial 3
The rotation becomes heavier and a greater amount of film winding force is required. Further, since the rewind operation knob 4 is exposed to the outside, it is unfavorable in terms of appearance.Especially in a self-winding film camera, the operation knob 4 is not necessary and is preferably not provided.

In a waterproof camera, after opening the rear cover of the camera, a rewinding shaft 3 is fitted onto the film winding shaft 2 of the cartridge 1 using an operating member provided inside the camera.
A configuration has been considered in which the rewinding shaft 3 is pulled up in the axial direction, but this also requires space in the camera body for the length of the rewinding shaft 3 to be pulled up in the axial direction.
There is a problem that the height of the camera becomes high.

Furthermore, as another means for attaching and detaching the cartridge, there is one in which the bottom plate of the film supply chamber of the camera body is integrated with the rear cover, and the cartridge 1 can be attached and detached by opening and closing the rear cover. However, this has the drawback that the waterproofing process is complicated and is not reliable, and the operability of attaching and detaching the cartridge is not very good.

Therefore, it is conceivable to provide a case for storing the film cartridge in the film supply chamber of the camera body, and configure this case to be detachable from the camera body, but in this case, the film winding shaft of the film cartridge can be rotated. The problem is the connection between the drive shaft for driving the film and the film rewinding drive system.

In view of the above points, the purpose of the present invention is to provide a cartridge holding case that can be tilted in a direction that makes it easy to attach and detach the film cartridge to the camera body, and to connect the drive shaft and the film rewind drive system using a bevel gear mechanism. It is an object of the present invention to provide a film cartridge mounting device for a camera which performs the following steps.

The present invention will be explained below with reference to illustrated embodiments.

FIG. 2 is a perspective view of the main parts of a camera with the film cassette mounting device of the present invention as seen with the rear cover removed, and FIG. Figure B shows the state when the film cartridge is taken in and taken out. In the film supply chamber 5 of the camera body 6, a cartridge holding case 11 of a film cartridge mounting device 10 is disposed. As shown in FIG. 2A, this cartridge holding case 11 stores the film cartridge 1 and holds it in its proper position when the film 7 is loaded, and when the cartridge 1 is taken out with a photographed film stored therein. , or when attaching the cartridge 1 containing raw film that has not yet been photographed, the cartridge holding case 11 is moved in such a direction that a portion thereof protrudes from the camera body 6 so that the film cartridge 1 can be easily attached and detached, as shown in FIG. 2B. It is designed so that it can be tilted.

FIG. 3 is an enlarged perspective view of a film cartridge mounting device showing an embodiment of the present invention. This film cartridge mounting device 10 includes a cartridge holding case 11 for storing and holding a film cartridge, a drive shaft 12 disposed inside the case 11, and a drive shaft 12 for rewinding the film. It mainly comprises a bevel gear mechanism 13 for transmitting rotational driving force and for tilting the cartridge holding case 11 to the film cartridge attachment/detachment position. In a camera equipped with the above device 10, an automatic winding mechanism 16 that rotates a film winding spool 15 by a motor 14, and an automatic winding mechanism 16 that rotates a film winding spool 15 by the motor 14, and a drive shaft 12 are driven by the motor 14 through the bevel gear mechanism 13. A rotating automatic rewind mechanism 17 is selectively activated. That is, the automatic winding mechanism 16 and the automatic rewinding mechanism 17 are connected to the motor 14 by the clutch 18.
The rotational driving force of the rotor can be switched.
When winding a film, the electric circuit 19 is activated to drive the motor 14 in forward rotation, and the drive gear 20 fixed to the rotating shaft of the motor 14 rotates in the direction of the arrow shown by the chain line, causing the gear 20 to rotate. When the force is transmitted to the sun gear 21 of the clutch 18 formed by a planetary gear mechanism, the planet gear 22 is transferred to the sun gear 21.
The rotation of the planetary gear 22 is further transmitted to the gear 26 integrated with the support shaft of the spool 15 via gears 23, 24, and 25 forming a gear train. The spool 15 rotates in the direction of the arrow to wind up the film. Further, when rewinding the film, the electric circuit 19 operates to drive the motor 14 in reverse rotation, and when the rotational force of the drive gear 20 in the direction of the arrow shown by the solid line is transmitted to the sun gear 21 of the clutch 18, the planetary gear 22 rotates to the solid line position,
The rotation of the planetary gear 22 further moves from the gear 27 to the bevel gear 28 coaxially integrated with the gear 27, to the bevel gear 29 disposed perpendicularly to the bevel gear 28, and further to the bevel gear 29 disposed perpendicularly to the bevel gear 29. , that is, a horizontally arranged bevel gear 30
The drive shaft 12, which is integrated with the bevel gear 30, rotates in the direction of the arrow to rewind the film.

The cartridge holding case 11 is shown in FIG.
As shown in FIGS. B and 4, the film cartridge 1 is formed at such a height that the upper part of the film cartridge 1 is exposed when it is housed therein, and has an open top. Further, as shown in FIG. 5, on the front side of the holding case 11, there is a film cartridge 1 when the holding case 11 is tilted.
A position regulating member 31 made of a flat thin plate is provided on the bottom plate 11a of the case 11 to prevent the holding case 11 from protruding forward from the holding case 11.
It is formed and provided so as to rise upward integrally with the. This position regulating member 31 is made of a relatively elastic material together with the cartridge holding case 11, and is normally kept perpendicular to the bottom plate 11a of the case 11 as shown in FIGS. 3 to 5. be. Upper edge 31 of this position regulating member 31
a is when cartridge 1 is inserted or removed.
The holding case 11 is formed in a slightly curved shape toward the outside so as not to damage the holding case 11 and to allow the holding case 11 to be operated directly by the position regulating member 31. Between the left end of the position regulating member 31 and the cartridge holding case 11, there is a positioning notch in which the film outlet 1a of the cartridge 1 is fitted and for accurately positioning the cartridge 1 within the case 11. 32 is formed. The cartridge holding case 11 also has a
An arc-shaped guide elongated hole 33 for regulating the amount of rotation is formed, and a stopper pin 34 provided on the camera body passes through the elongated hole 33. Furthermore, two click stop holes 35 and 36 are formed above the guide slot 33, and are always urged in the direction of the cartridge holding case 11 by a coil spring 37 provided on the camera body. A click mechanism is provided so that the click member 38 can be fitted into either one of the holes 35, 36.

The upper end of the drive shaft 12, which is rotatably disposed through the center of the bottom plate 11a of the cartridge holding case 11, engages with the film winding shaft 2 of the film cartridge 1 (see FIGS. 1A and B). It has a fork shape with two claws 12a and a cut groove 12b in the center for easy connection. As shown in FIG. 6, this drive shaft 12 and
Patrone holding case 11 integrated with drive shaft 12
A through hole 39 is provided through the axis of the bevel gear 30 disposed below the bottom plate 11a. This through hole 39 is formed with a small diameter at the lower part, and the small diameter part of the support shaft 40 is fitted into the lower end of the through hole 39, and the step part 39a of the through hole 39 is locked to the upper end of the small diameter part of the coaxial shaft 40. By screwing together the screw 41, the drive shaft 12 is rotatably supported with respect to the support shaft 40. A through hole 40 is provided in the lower part of the support shaft 40 and is perpendicular to the axial direction of the coaxial shaft 40.
A support shaft 43 rotatably attached to the immovable member 42 of the camera body rotatably passes through the through hole 40a. The bevel gear 29 is attached to the support shaft 43.
8 and 30, and the E-ring 44
axial movement is prevented.

The bevel gear mechanism 13 interlocked with the drive shaft 12 as described above is configured below the cartridge holding case 11, so that the holding case 11 and the drive shaft 12 are connected to the gears of the automatic rewinding mechanism 17 driven by the motor 14. It is possible to tilt from the state shown in FIG. 4 to the state shown in FIG. 5 without disengaging the mesh. That is, when the cartridge holding case 11 is tilted from the state shown in FIG. 4 to the state shown in FIG.
rotates around the support shaft 43, and the bevel gear 30 maintains a state of meshing with the bevel gear 29 even during this rotation.

Next, the operation of the film cartridge mounting device constructed as described above will be explained.

When the rear cover of the camera is opened to load film into the camera body 6, the cartridge holding case 11 is moved horizontally to the drive shaft with its bottom plate 11a and bevel gear 30 as shown in FIGS. 4 and 7A. 12 is standing still in a vertical position. In this state, the stopper pin 34 is located at the front end of the guide slot 33, and the click member 38 is fitted into the front click hole 35 to maintain a stable state. Next, when the upper edge 31a of the position regulating member 31 integrated with the holding case 11 is pulled forward with a finger, the holding case 11 and the position regulating member 31 are , the support shaft 40 and the drive shaft 12 integrated therewith rotate and tilt about the support shaft 43 in the direction of arrow c. This amount of rotation is sufficient so that the open end of the upper part of the holding case 11 faces completely outside the camera body 6 as shown in FIG. 2B, and the film cartridge 1 can be easily inserted and removed. It is said that
When the holding case 11 is fully rotated, the stopper pin 34 is located at the rear end of the guide elongated hole 33, and the click member 38 is fitted into the rear click hole 36 to maintain a stable inclined state. keep it. While the holding case 11 is rotating around the support shaft 43 together with the drive shaft 12, the bevel gear 30
remains in mesh with the bevel gear 29.
With the holding case 11 tilted as described above with respect to the camera body, the film cartridge 1 is inserted into the case 11 from its upper open end. When inserting the film cartridge 1 into the case 11, if the position regulating member 31 is further pulled, the regulating member 31 will be separated from the front of the holding case 11 and pulled out, as shown in FIG. 7B. Since the film cartridge is moved to the position 31A shown by the dotted chain line, the cartridge loading/unloading opening of the holding case 11 opens more widely, and the insertion operation of the film cartridge 1 becomes easier. Since the drive shaft 12 inside the holding case 11 is tilted together with the case 11, when the film cartridge 1 is inserted into the holding case 11, the film winding shaft 2 (the first
(see Figures A and B) is located coaxially with the drive shaft 12. The film cartridge 1 has its film outlet 1a connected to the holding case 11 and the position regulating member 3.
The holding case 11 is inserted into the holding case 11 so as to be positioned in the positioning notch 32 between the holding cases 11 and 11. At this time, if the protruding piece of the film winding shaft 2 of the film cartridge 1 does not fit into the fork portion consisting of the pawl 12a and the cut groove 12b of the drive shaft 12,
The film take-up shaft 2 is rotated by slightly pulling out the film 7 from the film cartridge 1 or by slightly turning the portion of the film wind-up shaft 2 projecting from the upper end of the film cartridge 1 by hand.
As a result, the film take-up shaft 2 is fitted onto the drive shaft 12, and the film cartridge 1 is housed in the proper position within the cartridge holding case 11. After storing the film cartridge 1 in the holding case 11 as shown in FIG. It rotates around the shaft 43 in the direction of arrow d, and is stored in the film supply chamber 5 in the camera body 6, as shown in FIG. 2A, and becomes in a cartridge-attached state. Even when the holding case 11 rotates in the direction of arrow d, the bevel gear 30 and the bevel gear 29 are in mesh with each other, and the connection between the automatic rewinding mechanism 17 and the drive shaft 12 is severed in the series of cartridge mounting operations described above. There is no. After the cartridge holding case 11 accommodates the film cartridge 1 and rotates back to its normal position in the film supply chamber, the film 7 is removed from the film outlet 1a of the film cartridge 1 located in the notch 32 of the holding case 11. is pulled out and wound around the film take-up spool 15 to load the film.

Although the above embodiment has been described with respect to a camera with an automatic winding and rewinding mechanism, it is of course applicable to a camera in which the drive shaft is rotated by a manual drive system.

As described above, according to the present invention, simply by rotating and tilting the cartridge holding case, the cartridge outlet of the case opens wide, and by simply returning the case to its original position, the film cartridge can be returned to its normal position. Since the film cartridge can be securely attached to the film cartridge, the attachment and detachment operation of the film cartridge is easier and more reliable than conventional cartridge attachment and detachment means, and there is no need for a configuration to operate the drive shaft from the outside. The camera body has become smaller and has a better appearance, and can be widely applied to waterproof cameras and cameras with automatic winding and rewinding mechanisms. Since the return driving force is transmitted, excellent effects such as smooth rotation of the cartridge holding case without disengaging the drive system are achieved.

[Brief explanation of the drawing]

1A and 1B are side views showing an example of conventional film cassette attaching/detaching means, FIGS. 2A and 2B are perspective views of essential parts of a camera having the film cassette mounting device of the present invention, and FIG. , an enlarged perspective view of a film cartridge mounting device showing an embodiment of the present invention;
Fig. 4 is a perspective view of the cartridge holding case of the device shown in Fig. 3 above with the film cartridge attached to the camera in its proper position, and Fig. 5 is a perspective view of the cartridge holding case of the device shown in Fig. 3 above. FIG. 6 is a sectional view of the mechanism for rotating the drive shaft of the device shown in FIG. 3, and FIGS. 7A and B are right side views of the device shown in FIG. 3. be. DESCRIPTION OF SYMBOLS 1...Film cartridge, 1a...Film outlet, 2...Film winding shaft, 3, 12...Rewinding drive shaft, 5...Film supply chamber, 6...Camera body, 7...Film, 10 ...Film cartridge mounting device, 11...Patrone holding case,
13...Bevel gear mechanism, 31...Position regulating member.

Claims (1)

[Scope of Claim for Utility Model Registration] A cartridge holding case that can be tilted in a direction in which a film cartridge can be detachably fitted to the camera body; a drive shaft that engages with and rotates the film take-up shaft of the film cartridge stored in the film cartridge; a first bevel gear that rotates coaxially with the drive shaft; and a first bevel gear that rotates integrally with the drive shaft; a support shaft that is parallel to the bottom plate of the holding case and serves as a center of rotation when the holding case is rotated; a second bevel gear that meshes with the first bevel gear with the support shaft as the center of rotation; A film cartridge mounting device for a camera, comprising: a drive mechanism having a third bevel gear that transmits a driving force from a drive source to the gear.