JPH0538342Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a film guide member for a camera, specifically a film guide member that guides the leading edge of the film fed by a sprocket to the film take-up spool when loading film into a camera. This invention relates to a guide member.

[Prior Art] When loading film into a camera, the film has a winding kink, so that the leading edge of the film does not fall into the front side of the film take-up spool, opposite to the winding direction of the film take-up spool. A film guide member is provided for this purpose. For example, in Utility Model Application Publication No. 56-77819, the fourth
As shown in the figure, on the sprocket shaft 23 provided on the screen opening frame 22 side of the spool chamber 21,
A trapezoidal film guide member 24 is attached to the side wall of the screen opening frame 22 with screws 25. Note that the reference numeral 26 is a film take-up spool. In addition, in the device disclosed in Japanese Utility Model Application No. 58-52526, as shown in FIG. 5, the free end of the support plate 28 holding the guide roller 27 is
The film guide member 30 extends along the circumference around the swing axis 29 of No. 8. Furthermore, in the one shown in FIG. 6, the spool chamber 2
A film guide member 31 having an L-shaped cross section is disposed on a sprocket shaft 23 provided on the side of the screen opening frame 22 of 1, and this film guide member 31 is attached to the side wall of the screen opening frame 22 by screws (not shown). A sprocket shaft 23 is attached to the sprocket shaft 23.

[Problems to be Solved by the Invention] In each of the above-mentioned conventional examples, screws 25 are required to attach the film guide member 24, and depending on their positions, there is a risk of damaging the film surface. In this case, the support plate 28, the film guide member 30, the guide roller, etc. are integrally constructed, which makes it complicated and difficult to manufacture, and it is also difficult to attach it to the camera body. Now, in order to fix it to the side wall next to the screen opening frame 22 in the spool chamber 21 with screws, a slide is inserted into the mold of the camera body, and further post-processing is required on the camera body. The guide member 31 is connected to the sprocket shaft 2
3, making it difficult to install.

This invention has been made in view of the above points, and provides a film guide member that does not require attachment with screws and can be easily attached to a camera body while regulating the position by three-point support. It is in.

[Means and effects for solving the problem] In this invention, the film guide member is only provided with two bent parts and a protrusion at the tip thereof, and the upper and lower walls of the spool chamber on the camera body side and the screen opening frame are It is only necessary to provide an engagement hole in the side wall of the film, and the film guide member is configured so that its position is regulated so that it can be easily attached. Therefore, it is only necessary to provide an engagement hole on the camera body side, and no post-processing is required, and assembly is as simple as inserting a protrusion or pin into the engagement hole.

[Embodiment] An embodiment of the film guide member of this invention will be described below with reference to FIGS. 1 and 2.
The camera body 1 is generally made of die-casting or the like, and a film take-up spool 5 having a friction member on its surface is disposed in a spool chamber 3, and is moved in the direction of the arrow by a film take-up drive system (not shown). It is configured to rotate and wind up the film F. A sprocket shaft 7 having sprockets 7a and 7b is disposed at the entrance of the spool chamber 3 on the side of the screen opening frame 2, and engages with the perforation of the film F to take up the film F on the spool 5.
It is now being sent to This sprocket shaft 7
On the upper side, a film guide member 4 having film guide surfaces 4c and 4d bent toward the spool 5 is attached to the sprocket shaft 7.
It is arranged to cover the On the other hand, a mounting member 1 having film guide rollers 9 and 10 is attached to a back cover 8 to which a hinge (not shown) is attached to the camera body.
1 is fixed to the mounting member 11, and a film pressing roller 13 is attached to the mounting member 11 by a leaf spring member 12. And spool chamber 3
A leaf spring member 15 having a film pressing roller 14 at its tip is attached to the side wall next to the screen opening frame 2 inside, and the film pressing rollers 13, 14
is adapted to press the film F against the surface of the film take-up spool 5.

Therefore, the screen aperture frame 2 is not visible, and the leading edge of the film F is guided by the sprockets 7a and 7b between the guide surfaces 4c and 4d of the film guide member 4 and the film guide rollers 9 and 10, and is guided to the film take-up spool. 5, the film is pressed by a film pressing roller 13, and as the spool 5 rotates, the film is sequentially wound onto the surface of the spool 5.

As shown in FIG. 2, the film guide member 4 has bent portions 4a, 4 having holes 4a', 4b' on both upper and lower sides.
b, film guide surfaces 4c and 4d formed by bending, and an engaging protrusion 4e formed by bending at the tip thereof. On the other hand, engagement holes 3a and 3b are formed in the upper and lower walls of the spool chamber 3 on the side of the camera body 1, and an engagement hole 3c is formed on the side wall on the side of the screen opening frame 2, respectively.

To attach the film guide member 4 to the camera body 1, align the holes 4a', 4b' of the bent parts 4a, 4b with the engagement holes 3a, 3b on the upper and lower walls of the spool chamber 3, respectively, and then insert the pin 6a. , 6b. The film guide member 4 is easily positioned and attached to the camera body 1 by simply inserting the protrusion 4e at the tip into the engagement hole 3c. The pins 6a and 6b are integrally formed on a base plate that supports a gear (not shown) for driving the sprocket and spool.

Next, another embodiment of the film guide member of this invention will be described based on FIG. In this example, instead of providing engaging holes 4a', 4b' in the bent parts 4a, 4b of the film guide member 4 shown in FIGS. 1 and 2, engaging projections 4 are provided at the tips of the bent parts 4a, 4b.
The only difference is that f and 4g are provided, and the other parts are completely the same as the examples shown in FIGS. 1 and 2, and the same members are given the same reference numerals and their explanations will be omitted.

That is, engagement holes 3a and 3b are formed in the upper and lower walls of the spool chamber 3 of the camera body 1, and engagement holes 3c are formed in the side wall. Therefore, in order to attach the film guide member 4' to the camera body 1, the protrusion 4e at the tip of the film guide member 4' is inserted into the engagement hole 3 provided in the side wall of the camera body 1.
c, and then, while pressing the bent portions 4a, 4b of the film guide member 4' inward, insert the film into the engaging holes 3a, 3b in the upper and lower walls of the spool chamber 3 of the camera body 1.
By simply fitting the film guide member 4' into the camera body 1, the position of the film guide member 4' is regulated and attached to the camera body 1. Therefore, this embodiment can be installed more easily than the embodiments shown in FIGS. 1 and 2 above.

[Effects of the invention] The film guide member of this invention requires only simple machining, and can be mounted to the camera body with its position controlled by three-point support without requiring any special screws or parts. It can be easily formed without any post-processing, which greatly simplifies the camera assembly process and reduces costs.

[Brief explanation of the drawing]

FIG. 1 is an enlarged sectional view showing a state in which a film guide member according to an embodiment of the present invention is attached to a spool chamber, and FIG. 2 is a perspective view showing a state before the film guide member in FIG. 1 is attached. 3 is a perspective view showing a state before attaching a film guide member showing another embodiment of the present invention, and FIGS. 4 to 6 show conventional film guide members, respectively. The figure is a perspective view showing the state in which the film guide member is attached, FIG. 5 is a sectional view of the film guide member showing another example, and FIG.
The figure is a sectional view of a film guide member showing still another example. 1...Camera body, 3...Spool chamber, 3a,
3b, 3c...Engaging hole, 4...Film guide member, 4a, 4b...Bending portion, 4c, 4d...Film guide surface, 4e, 4f, 4g...Engaging protrusion,
5... Film take-up spool, 6a, 6b... Pin (protrusion), 7... Sprocket shaft, 7a, 7b
...Sprocket, F...Film.

Claims (1)

[Claims for Utility Model Registration] A mounting device for a film guide member that is disposed near the sprocket shaft of a spool chamber of a camera and guides the film from the sprocket to the film take-up spool during film loading, A film guide surface bent approximately along the outer circumference of the sprocket, an L-shaped bent portion provided at both upper and lower ends of one side of the film guide surface, and an L-shaped bent portion formed at the tip of the other side of the film guide surface. An engaging portion that engages with the locking projection is formed between the sprocket of the camera body and the screen opening frame, and an engaging portion that engages with the locking projection of the camera body A film guide member mounting device for a camera, characterized in that engaging portions that engage with the bent portions are provided on upper and lower wall surfaces between the spool and the sprocket.