JPH0267545A - Film integrated type camera - Google Patents

Abstract

PURPOSE:To stabilize the film winding chamber at the time of using the camera with simple constitution and to allow simple disconnection at the time of disconnection by partially joining the film winding chamber and a front cover and weakening the joint strength thereof to the extent of allowing the easy removal of the front over. CONSTITUTION:The film winding chamber 11 and the front cover 3 are partially joined and the joint strength thereof is weakened to the extent of allowing the easy removal of the front cover. The front cover 3 is removed from a rear cap 7 in the joint part 7b. A camera body 6 and the rear cap 7 are strongly joined in the joint part 7b but the joining of the front cover 3 and the rear cap 7 is relatively weakened so that a user is able to easily remove the front cover 3 by prying the cover with a screw driver or the like. The film winding chamber is stabilized in this way without using fresh parts and the disconnection of the film winding chamber is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an integrated film camera, such as a disposable camera, in which film is loaded at the manufacturer's end.

(Prior Art) Recently, film-integrated cameras have come on the market that have a built-in film and allow users to easily take pictures.

This type of camera may be subjected to development processing after the shooting is completed, but the applicant has designed a separation section between the film winding chamber and the film exposure chamber in order to facilitate the development processing and to make the camera more compact. He proposed a camera in which the film winding chamber was separated from the camera so that it could be handled like a regular cartridge.
No. 327) In this type of camera, the film winding chamber needs to be securely fixed to the camera without wobbling when the camera is in use, and for this reason, it has been conventionally proposed to reinforce the separation part with a reinforcing member. There is. However, this increases the number of parts and also increases the number of man-hours required to determine the reinforcing member.

(Object and structure of the invention) The present invention has been made in view of the above points, and an object of the present invention is to use a simple structure to stabilize the film winding chamber when using the camera and to easily separate it when separating the film. In order to achieve this purpose, the film winding chamber and the front cover of the camera are partially joined, and the joint strength is made weak to the extent that the front cover can be easily removed.

(Example) The present invention will be explained below based on the drawings.

FIG. 1(a) is a perspective view of a film-integrated camera according to the present invention, and FIG. 1(b) is a sectional view thereof.

In FIG. 1(a), l is a photographing lens, 2 is a release button, 3 is a front cover of the camera, 4 is a finder, and 5 is a film advance knob.

Further, in FIG. 1(b), 6 is the camera body, 7 is the back cover of the camera, and 8 is a film.

One side of the film 8 becomes a pull winding portion 8a and is stored in the film storage chamber 9, and the other is a zero winding shaft that is locked to the winding shaft lO and stored in the film winding chamber 11. 10 is connected to the winding knob 5, and the film 8 is wound onto the winding shaft lO by operating the winding knob 5. To load the film 8, pull the winding section 8a to the film storage chamber 9.
In addition, after the winding shaft 10 is housed in the film winding chamber 11, the back cover 7 and the camera body 6 are welded by ultrasonic welding at the joints 7a and 7b.

12 is a separation section provided between the film winding chamber 11 and the film exposure chamber 13, and when the film is wound into the film winding chamber 11 after shooting, as shown in FIG. The film winding chamber 11 can be separated at a separation part 12. In this embodiment, the film winding chamber 11 has the same shape as a cartridge system for 35 mm film, and the dimensions are such that it can be hung in a separated state in a current automatic processing machine.

The back M7 and the front cover 3 are bonded or welded at the joint 7b, so the film winding chamber 11 is attached to the front cover 3.
It is reinforced by the camera and will not wobble during shooting.

FIG. 3 is an enlarged view of the joint 7b. The camera body 6 and back cover 7 are ultrasonically welded using a relatively long energy director 7C, so they will not come off even if a fairly strong force is applied. do not have.

On the other hand, the front cover 3 and the back cover 7 are ultrasonically welded using a short energy director 7d, and the bonding strength is weak.
For example, the front cover 3 can be easily removed by inserting a dry knife into the joint between the front cover 3 and the back cover 7 and prying the joint.

Note that in FIG. 2, the shutter mechanism and other mechanical mechanisms of the camera are omitted because they are not related to the gist of the present invention.

FIG. 4 is an enlarged sectional view of the cut-off section, and a narrow section 15 is formed between the film winding chamber 11 and the film exposure chamber 13, leaving a thin section 14. A groove 1 is provided in the thin wall portion 14.
4a is formed, and the film winding chamber 11 is opened from this groove 14a.
The thin wall portion up to becomes the light shielding piece 16. The light shielding piece 16 is made of an elastic material (polycarbonate, polyacetal,
ABC resin, etc.), and as shown in FIG. 5, it is molded with the back side inclined, and then bent to the position shown by the chain line in FIG. 5 when assembled. Therefore, the light shielding piece 16 is always subjected to an elastic force that tends to return it to its original position, that is, a force that tends to block the film path 17. If the groove 14a is destroyed, the light shielding piece 16 will be removed from the film winding chamber 11.
is displaced in the direction of blocking light.

Further, the light shielding piece 16 has a protrusion 16a formed at its tip. As shown in FIG. 6, two protrusions 16a are provided on both sides of the light shielding piece 16 at positions separated from each other in the width direction of the film so as not to hit the photographing screen of the film 8. 16
b is a light shielding plate provided between the two protrusions 16a.

In FIG. 4(A), a thin part 18 is formed on the back cover 7 at a position facing the light shielding piece 16, and the thin part 18 has a groove 1.
A groove 18a is formed at a position facing 4a. Groove 1
The groove 4a has a deeper cut than the groove 18a and is more easily broken. However, both grooves should be at least 0.5 mm.
A certain thickness remains, and the film 8 is not exposed to light through this groove.

Now, after all the shooting is completed, the film 8 is moved into the film winding chamber 11 except for the end part by the winding knob 5.
be rolled up. Leaving a small portion of the end of the film is for the convenience of later development work.For this purpose, for example, a locking claw may be provided at the end of the film 8, or a film counter mechanism may be used to wind the film. The winding knob 5 may be prevented from rotating at a predetermined position in the final stage.

Next, as shown in FIG. 2, the front cover 3 is removed from the back cover 7 at the joint 7b. At the joint 7b, the camera body 6 and the back cover 7 are strongly joined, but the front cover 3 and the back cover are The connection with the front cover 7 is relatively weak, and the user can easily remove the front cover 3 by prying it with a screwdriver or the like.

Further, a groove may be formed in this joint portion 7b so that a coin or the like can be inserted to pry open the front cover.

Pry open the front cover 3 and remove the film winding chamber 11 from the back cover 7.
When folded to the side, as shown in FIG. 4(b), first the deep groove 14a is destroyed, and the light shielding piece 16 plunges into the film path 17 due to its elasticity. and light shielding piece 16
A light shielding plate 16b (see FIG. 6) formed at the tip of the film 8 hits the thin wall portion 18 of the back cover 7 with the film 8 in between, blocking the film passage 17, and the film winding chamber 11 is completely shielded from light.

When the film light-shielding chamber 11 is further folded toward the back cover 7 side, as shown in FIG. be separated from

After separation, you can send it for development just like a normal cartridge. During film development, the film winding chamber 11 has the same shape as the cartridge, making it easy to handle. It is easy to pull out and development work is also easy.

To pull out the film 8 during film development, just pull the leading edge of the film 8. Figure 7 shows this situation. When the film 8 is pulled, the light shielding piece 16 is pulled out under tension. pushed by. Then, the surface of the film 8 hitherto hit the light shielding plate 16b of the light shielding piece 16, but as the angle of the light shielding piece 16 changes, the light shielding plate 16b moves away from the film surface. On the other hand, the protrusion 16a
is still in contact with film 8, but as mentioned above,
Since the protrusion 16a is provided at a position away from the photographing screen of the film 8, the photographing screen of the film will not be damaged even when the film is pulled out.

There are other ways to prevent the film from being damaged. For example, a support rod is provided on the back cover 7 side to hold the light shielding piece 16 open in the opening direction when the film is pulled out. You may also open it.

In the above embodiment, ultrasonic welding was used to join the front cover and back cover, but the method is not limited to this; heat welding may also be used, or other joining methods such as adhesive bonding or hooking may also be used. You can.

In short, the front cover has a film winding chamber and at least a portion (
It is sufficient if the separated portion can be reinforced by joining at a later angle. Further, the joint strength may be made weak enough to allow the front cover to be easily removed when the film winding chamber is separated.

(Effects of the Invention) As explained above, according to the present invention, the film winding chamber and the front cover of the camera are partially joined, and the strength of the joint is weakened to the extent that the front cover can be easily removed. Once configured, the film winding chamber can be stabilized without using any new parts, and the film winding chamber can be easily separated.

[Brief explanation of the drawing]

Fig. 1 (a) is a perspective view of a film integrated camera according to the present invention, (b) is a sectional view thereof, Fig. 2 is a sectional view showing the film winding chamber separated, and Fig. 3 is a back cover. Figure 4 is a cross-sectional view of the separated part, Figure 5 is a cross-sectional view showing the shape of the light shielding piece during molding, and Figure 6 is an enlarged view of the tip of the light shielding piece. The enlarged perspective view and FIG. 7 are cross-sectional views showing the operation of the light shielding piece when drawing out the film.

Claims (1)

[Claims] In a film-integrated camera in which film is pre-loaded and a constriction is provided between the film winding chamber and the film exposure chamber to separate the film winding chamber, the film winding chamber and the front cover of the camera are partially separated. A film-integrated camera characterized in that the front cover is bonded to the front cover and the bond strength is weakened to the extent that the front cover can be easily removed.