JP3025400B2 - How to attach a flare prevention frame to a film unit with a lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a flare preventing frame in a film unit with a lens.

[0002]

2. Description of the Related Art A film unit with a lens is a unit body having a simple photographing mechanism in which an unexposed photographic film with a patrone is built in advance, so that a photograph can be easily taken without carrying a camera. The applicant has also widely offered “Sharp Run Econo Shot” (trade name) at a low price.

In this film unit with a lens, when the user presses a shutter button after performing a film winding operation in the same manner as a general camera operation, a shutter blade opens and closes, and a subject image is formed on a film set in an aperture. Exposed. The taking lens is provided on a lens substrate having an aperture opening, and a flare prevention frame is provided between the lens substrate and the aperture. The flare prevention frame has an opening substantially similar to the aperture, and cuts a light flux of the subject light incident from the aperture opening toward the outside of the shooting screen to reduce flare.

When such a flare-preventing frame is assembled to a lens-fitted film unit, a chuck mechanism for holding the flare-preventing frame conventionally places the flare-preventing frame at a predetermined position on the lens-fitted film unit, and then caulks the same. The mechanism fixes the film unit with the lens and the flare prevention frame by caulking.

[0005]

However, in order to fix the anti-flare frame to the film unit with the lens as described above, the step of mounting the anti-flare frame on the film unit with the lens, Two steps, a step of caulking the prevention frame and fixing the film to the lens-fitted film unit, are required, which has been a problem in terms of productivity of the lens-fitted film unit and rationalization of manufacturing.

Further, after the flare prevention frame is mounted on the film unit with the lens, there is a case where the flare prevention frame is displaced from the position where the flare prevention frame is fixed due to mechanical vibration or the like before heat staking.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. When the anti-flare frame is fixed to the lens-fitted film unit, the mounting machine and the process are simplified, so that the lens-fitted film unit is simplified. It is an object of the present invention to provide a method for streamlining productivity and manufacturing, and for securely attaching a flare prevention frame to a film unit with a lens.

[0008]

According to the present invention, in order to achieve the above object, when attaching a flare prevention frame to a lens-fitted film unit, the lens-fitted film unit is held with the eyepiece side facing downward, and the flare is prevented. A crimping section is provided on the arm for mounting the prevention frame on the film unit with lens, and the arm is used to set the anti-flare frame on the mounting position of the film unit with lens from below and at the same time on this arm This is a method of caulking the flare prevention frame with the caulked portion.

According to a second aspect of the present invention, when the anti-flare frame is attached to the film unit with the lens, the anti-flare frame is fixed to an arm for mounting the anti-flare frame and attaching the anti-flare frame to the film unit with the lens. The holding means and the caulking part are provided, and the flare prevention frame is set at the mounting position of the film unit with the lens using this arm, and at the same time, the flare prevention frame is caulked and mounted by the caulking part provided on this arm. is there.

Further, in the third aspect, the upper surface of the caulking portion of the first or second aspect is recessed by 0.1 to 0.5 mm from the peripheral portion.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a perspective view of a film unit with a lens embodying the present invention. The unit main body 1 of the film unit with a lens is composed of a main body 2 incorporating a simple photographing mechanism.
And a front cover 3 and a rear cover 4 attached thereto. The main body 2 is formed with a patrone chamber 7 for accommodating the patrone main body 6 of the photographic film patrone 5 and a film roll chamber 9 for accommodating the unexposed film 8 drawn out from the patrone main body 6 in a roll shape. .

A dark box 11 is provided between the patrone chamber 7 and the film roll chamber 9, and an aperture 12 for defining a photographing screen is formed. The rear cover 4 has a lid 4
a is formed so as to be rotatable, and by opening it, the photographed film cartridge 5 which has been photographed can be taken out of the cartridge room 7. Although not shown, the lens-fitted film unit is used with the unit body 1 covered with a package such as a paper box.

Inside the dark box section 11, there is provided a flare prevention frame 13 for cutting a light beam going outside the photographing screen and preventing flare. As shown in FIG. 3, the opening 14 has a short side edge 21a, 21b in an arc shape convex inward, and a long side edge 21c, 21d in a straight line shape. Since the edges 21a and 21b are arc-shaped convex inward, the reflected light is dispersed and the amount of flare is reduced. In addition,
The tangents 23a, 23b of the edges 21a, 21b and the edges 21c, 2
The rectangle constituted by 1d is almost similar to the aperture 12, and the photographing screen is not shaken by the edges 21a and 21b. Further, mounting holes 22a and 22b are formed on the short side of the flare prevention frame 13, and the mounting pin 19 of FIG. 2 is inserted and fixed by caulking, as will be described in detail later.

FIG. 4 shows a film unit with a lens.
FIG. 1 is a perspective view showing a state in which a flare prevention frame is attached according to the present invention, and FIG. 1 is a cross-sectional view around the flare prevention frame at that time. The arm 25 for mounting the flare prevention frame is moved up and down by a pneumatic mechanism (not shown). The flare prevention frame 13 is fitted on the positioning stage 26 on the upper surface of the arm 25, and is mounted. Is placed.
At both ends of the positioning stage 26, caulking portions 20a,
20b are provided.

The mounting pins 19a and 19b provided integrally with the dark box portion 11 of the film unit with lens 1 held so that the eyepiece side faces downward are provided with a flare prevention frame 13.
Holes 22a, 22b are fitted respectively, and the tip portions 19c, 19d of the mounting pins 19a, 19b are compressed and crushed by the caulking portions 20a, 20b of the arm 25, and the caulking portion 20 is
a, 20b, respectively, whereby the anti-flare frame 1
3 is fixed to the film unit 1 with a lens.

The operation of the above configuration will be described. FIG. 5 is a schematic view showing a process of assembling the main body of the film unit with a lens. The lens-fitted film unit 1 that has flowed in by the carry-in conveyor 31 from the previous process is held on a circular conveyor called a rotary table 32. The turntable 32 rotates clockwise,
Around each of these, there are respective assembling steps of the film unit with lens 1 indicated by A to X.
Jigs and the like are arranged, and necessary parts are automatically supplied by the conveyor 33. The rotary table 32 is stopped in each of the assembly processes A to Z, and the assembly is performed fully automatically.

The attachment of the flare prevention frame 13 to the lens-fitted film unit 1 is performed at the T portion of the rotary table 32. FIG. 6 is an explanatory diagram illustrating a process of attaching the anti-flare frame. A large number of flare prevention frames 13 are stacked on the stocker 36, and the setting plate 37
Is the flare prevention frame 1 one by one from the bottom of the stocker 36.
3 is extruded and placed on the positioning stage 26 of the arm 25. The arm 25 rises simultaneously with the placement of the flare prevention frame 13 and enters the dark box 11 of the film unit with lens 1 held by the dark box holding mechanism 38 so that the eyepiece side faces downward.

When the arm 25 is raised to the set position, the mounting pins 19a and 19b shown in FIG. 4 are fitted into the holes 22a and 22b of the anti-flare frame 13, respectively, and at the same time, the tips 19c and 19d of the mounting pins 19a and 19b are moved. , Arm 25
The crimping portions 20a, 20b compress and crush the tip portions 19c, 19d, and expand into the crimping portions 20a, 20b, and the flare prevention frame 13 is crimped to the mounting pins 19a, 19b. As a result, the flare prevention frame 13 is moved from the setting of the film unit 1 with the lens to the fixing thereof to the arm 2.
5 is performed by one reciprocating operation.

The film unit with lens 1 having the flare prevention frame 13 attached thereto is then sent to the next step by the unloading conveyor 39 through the steps U to X.

FIG. 7 shows an embodiment in which a suction mechanism for holding the flare prevention frame is provided on the arm for mounting the flare prevention frame. In this embodiment, the lens-fitted film unit is held sideways, and the arm 41 moves in the horizontal direction, and the flare prevention frame 13 is assembled.

When the flare prevention frame 13 is set on the positioning stage 42 of the arm 41, the suction pipe 43 is depressurized at the same time, and the flare prevention frame 13 is sucked and fixed by the suction portion 44. The arm 41 moves in the horizontal direction at the same time when the flare prevention frame 13 is sucked by the suction portion 44, and enters the dark box portion 46 of the film unit with the lens.

When the arm 41 moves to the set position, the mounting pins 19a, 19b are connected to the holes 22a, 22a of the anti-flare frame 13.
22b, and at the same time, the mounting pins 19a, 1
9b are swaged portions 48a, 48b of the arm 41.
As a result, the distal ends of the mounting pins 19a, 19b expand into the caulking portions 48a, 48b, and the flare prevention frame 13 is caulked by the mounting pins 19a, 19b. As a result, the flare prevention frame 13 is performed by one reciprocating operation of the arm 41 from setting to fixing to the film unit 1 with the lens.

[0023]

As described above, according to the method for mounting the anti-flare frame in the film unit with lens according to the present invention, the caulking portion is provided on the arm for mounting the anti-flare frame and mounting it on the film unit with lens. In order to caulk and attach the flare prevention frame by the caulking portion provided on this arm, the step of mounting the flare prevention frame on the film unit with lens and the film unit with lens by caulking the mounted flare prevention frame The process of fixing the film unit can be integrated, and the productivity and production of the film unit with the lens can be streamlined.

Also, since the flare prevention frame is set on the film unit with the lens and caulked and fixed at the same time,
After the flare prevention frame is set, the flare prevention frame does not deviate from the set position due to machine vibration or the like.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view around the flare prevention frame when the flare prevention frame is attached to a film unit with a lens according to the present invention.

FIG. 2 is an exploded perspective view of a film unit with a lens to which a flare prevention frame is attached according to the present invention.

FIG. 3 is a plan view of a flare prevention frame used in the present invention.

FIG. 4 is a perspective view showing a state in which a flare prevention frame is attached to a film unit with a lens according to the present invention.

FIG. 5 is a schematic view of an assembling process of a film unit with a lens.

FIG. 6 is an explanatory view showing a process of attaching a flare prevention frame.

FIG. 7 is a sectional view of another embodiment in which a flare prevention frame is attached to a film unit with a lens according to the present invention.

[Description of Signs] 1 Film unit with lens 11 Dark box part 12 Aperture 13 Flare prevention frame 14 Opening 19 Mounting pin 20 Caulking part 22 Hole 25 Arm 26 Positioning stage 43 Suction pipe 44 Suction part

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-323510 (JP, A) JP-A-6-82977 (JP, A) JP-A-5-210207 (JP, A) JP-A-49-49 12466 (JP, A) JP-A-55-100670 (JP, A) JP-A-56-134022 (JP, U) JP-A-62-141909 (JP, U) (58) Fields investigated (Int. ⁷ , DB name) G03C 3/00 G03B 17/04 G03B 9/00-9/54 H01R 43/027-43/28 H01H 19/00-21/88

Claims (3)

(57) [Claims] When mounting a flare prevention frame for preventing a flare at the time of photographing by a film unit with a lens on the film unit with a lens, the film unit with a lens is held so that an eyepiece side faces downward, An arm for mounting the flare prevention frame on the film unit with a lens, and a fixing pin integrally projecting from the film unit with the lens to fix the flare prevention frame to the film unit with the lens. A caulking portion for caulking the tip is provided, and the flare prevention frame is set from the lower side to the mounting position of the film unit with a lens using the arm, and at the same time, the caulking portion caulks the tip of the fixing pin. How to install the prevention frame. 2. When mounting a flare prevention frame for preventing a flare at the time of photographing by a film unit with a lens onto a film unit with a lens, the frame for mounting the flare prevention frame is mounted on the film unit with a lens. Means for fixing and holding the anti-flare frame to the arm, and crimping a tip of a fixing pin integrally projecting from the film unit with lens to fix the anti-flare frame to the film unit with lens. A method for mounting the flare prevention frame, wherein the arm is used to set the flare prevention frame at the mounting position of the film unit with a lens, and at the same time, the crimping portion crimps the tip of the fixing pin. 3. The method according to claim 1, wherein the upper surface of the caulking portion is recessed from a peripheral portion thereof.