JPH07134328A - Film unit with lens - Google Patents

Abstract

PURPOSE:To surely and mutually couple the parts of a film unit with a lens. CONSTITUTION:A main body part 4 and an exposure unit 5 are coupled by pushing a hook pawl 29 integrally formed with the main body part 4 in a locking hole 35 formed in the exposure unit 5. The pawl 29 is pushed in while elastically deforming a tongue piece 37. When the pawl 29 is pushed in further, it is perfectly engaged with a locking edge 36. The tongue piece 37 elastically deformed is restored to a nearly original state and the hole 35 is narrowed to restrict play in a direction perpendicular to the inserting direction of the pawl 29.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film unit with a lens.

[0002]

2. Description of the Related Art A lens-fitted photo film unit widely sold by the applicant (trade name: "Sharp Run")
Is a unit main body composed of a plurality of plastic-molded parts, in which a film is built in advance, and after use, the film is collected in a developing station in a state where the film remains. At the developing station, the exposed film is taken out from the unit main body and developed and printed. The manufacturer collects the unit main body from which the film has been removed, disassembles the unit main body into multiple parts and inspects each, and the accepted products are reused as the parts as they are, and the rejected products are crushed and melted and recycled as raw materials. Used.

Considering such recycling suitability, many of the plurality of parts constituting the unit main body are connected by hook engagement between hook hooks and locking holes, and are devised so as to be easily disassembled. For example, in the main body base where the film storage chamber and the cartridge storage chamber are integrally formed, a hook claw provided with a claw part at the tip of an elastically deformable arm part is integrally molded so as to project forward, and a shutter mechanism or A locking hole is formed in the base of the exposure unit to which the film winding stop mechanism is assembled. Then, when the exposure unit is pressed toward the front surface of the main body base by the automatic assembly device, the hook claws enter the locking hole while deforming the arm part, and when the claw part passes through the locking hole, the arm claws move. By the restoration of the portion, the claw portion engages with one end edge of the locking hole, and the exposure unit is integrally connected to the main body base portion.

[0004]

However, if the parts are connected by the claw engagement as described above, there is an advantage that the disassembly becomes easy, but the engaging part is easily disengaged when a shock such as a drop is applied. There is a drawback that. For this reason, the pawl engagement may be partially disengaged due to vibration or the like at the shipping and transportation stages, which may cause a failure. Further, as the number of times the parts are reused increases, the claw engagement becomes loose, and the above-mentioned accidents may increase.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lens-fitted film unit in which the claw engaging portion is not easily disengaged even when an impact is applied.

[0006]

In order to achieve the above-mentioned object, the present invention has a first component and a second component which are molded from plastic, and the first component has elasticity. A hook claw provided with a claw part at the tip of the arm part is integrally formed, and the hook claw is inserted into the locking hole formed in the second part while elastically deforming the arm part. The second part of the lens-fitted film unit in which the first part and the second part are connected to each other by engaging the claw portion at one end edge is substantially orthogonal to the insertion direction of the hook claw and partially blocks the locking hole. In this way, the elastic tongue extending toward the one edge is integrally molded, and this tongue is elastically deformed by the pressing of the hook claw tip and the hook claw is inserted into the locking hole. When the pawl is engaged with the one edge, it is restored and the locking hole is narrowed. Claw portion in the direction perpendicular to the direction of insertion of the click pawl is prevented from being released coupling parts each other even if the user is careless handling so as to restrict the move. In the invention of claim 2, the first component and the second component
Concavities and convexities are formed on each of the parts in the vicinity of the hook claw and the engaging hole, and the concavities and convexities are fitted by the engagement of the claw portion and the one end edge so that the first part and the second part are hooked. Since the relative movement in the direction orthogonal to the insertion direction of the claws is restricted, the coupling between the parts becomes more reliable.

[0007]

FIG. 4 and FIG. 5 are exploded views of a unit body 2 of a lens-fitted film unit according to the present invention. The unit main body 2 is composed of a front cover 3, a main body portion 4, an exposure unit 5, a strobe unit 6, and a rear cover 7, which are detachably attached by claw engagement.

The front cover 3 is composed of a front cover body 10, a cover plate 11 fixed to the front surface of the front cover body 10, and a panoramic field frame 12 installed between them. Notches 13 and 14 and a triangular mark 15 are formed in the panoramic field frame 12. The panoramic field frame 12 is arranged in the storage space 16 of the front cover body 10, is slidably attached by the cover plate 11, and the operation knob 17 is exposed from the slot 18. The panoramic view frame 12 is a storage space 1
The notches 13 and 14 are click-coupled and locked to the pair of click claws 19 and 20 formed on the lower edge of the six.

The cover plate 11 has a finder objective aperture 23 defining a full-size field of view having the same aspect ratio as the full-size exposure screen. When the operation knob 17 is slid to the right in the slot 18, the panoramic view frame 12 is moved from the normal shooting position to the panorama shooting position, and when it is slid to the left, the panoramic view frame 12 is moved.
Is moved from the panoramic shooting position to the normal shooting position and locked. Further, the left side of the front cover body 10 has a cylindrical shape corresponding to the cartridge storage chamber 25, and is used as a grip during photographing.

The main body 4 has a cartridge storage chamber 25 and a film roll chamber 26 formed on both sides of the optical axis 24. The outer wall surface of the cartridge storage chamber 25 has a shape projecting more forward than the outer wall surface of the film roll chamber 26. A fixed frame 28 is formed around the exposure opening 27 at the center of the main body portion 4 so that the exposure unit 5 can be fitted therein. In the vicinity of the fixed frame 28, as shown in FIGS.
As also shown in FIG. 5, in order to attach the exposure unit 5 detachably, the hook claw 29 in which the claw part 29b is provided at the tip of the elastically deformable arm part 29a is integrally formed. Also, along the wall surface of the cartridge storage room 25, the convex portion 31
Are formed.

The exposure unit 5 includes a film number display plate, a lock lever, a shutter drive lever, a shutter blade, a film winding mechanism including a driven sprocket, a shutter mechanism and a light shielding tube 32, and an aspect including a light shielding plate for limiting an exposure screen. And a ratio switching mechanism, and a finder unit 33 is mounted on the upper part thereof. When the above-mentioned panoramic field frame 12 is moved from the normal photographing position to the panoramic photographing position, when the intermediate lever 34 provided on the upper part of the finder unit 33 is pressed, it is incorporated in the light shielding tube 32 in conjunction with it. A pair of shading plates move up and down to switch the aspect ratio of the exposure screen. Immediately below the number display plate, a locking hole 35 is formed integrally with the light shielding tube 32. As shown in FIG. 3, this locking hole 35
A locking edge 36 is formed at one end edge of the, and a square-shaped tongue piece 37 is formed at the end edge facing the locking edge 36. Further, a U-shaped concave portion 38 is formed on the side surface of the light shielding tube 32.

The connection between the main body 4 and the exposure unit 5 is performed by pushing the projections 31 on the wall surface of the cartridge storage chamber 25 along the recesses 38 on the side surfaces of the light-shielding cylinder 32 and pushing them in as they are. The peripheral edge of the opening of the light shielding tube 32 of the exposure unit 5 is the main body 4
It is inserted in the fixed frame 28 of. The hook claw 30 is the light-shielding tube 3
2 engages with a locking edge (not shown) on the right side when viewed from the front of 2.

The hook claw 29 is pushed in as shown in FIGS. The hook claw 29 is composed of an elastically deformable arm portion 29a and a claw portion 29b provided at the tip thereof. When the hook claw 29 is pushed in, the inclined surface of the hook claw 29 is applied to the inclined surface of the locking edge 36 and guided to the locking hole 35 while deforming the arm portion 29a.
The tip of the hook claw 29 is inserted while elastically deforming the tongue piece 37. When the hook claw 29 is further pushed, the arm portion 29a is restored and the claw portion 29b and the locking edge 36 are claw-engaged. Then, the elastically deformed tongue piece 37 returns to its original position to narrow the locking hole 35, and restricts the movement of the hook claw 29 in the direction perpendicular to the inserting direction. At that time, the convex portion 31 of the wall surface of the cartridge storage chamber 25 and the concave portion 38 of the side surface of the light shielding tube 32 are fitted to each other, and the opening peripheral edge of the light shielding tube 32 is inserted into the fixed frame 28 of the main body portion 4, so that the main body The relative movement of the portion 4 and the exposure unit 5 in the direction orthogonal to the insertion direction of the hook claw 29 is restricted.

The connection between the body 4 and the front cover 3 is
As shown in FIGS. 6A to 6D, the hook claw 41 and the convex portion 42 formed at a position where the outer wall of the film roll chamber 26 supports a part of the back surface of the cover body 10 has a front cover body. It is performed by pushing in the locking hole 46 formed in 10 and the recess 47 formed in the back surface thereof.

The hook claw 41 is composed of an arm portion 41a and a claw portion 41b. The tongue piece 4 is attached to the edge of the locking hole 46.
4 is formed and the edge portion serves as the locking edge 45. The tongue piece 44 has a triangular shape as can be seen from FIGS. 4 and 6D. When the hook claw 41 is pushed into the locking hole 46, the arm portion 41a enters while elastically deforming, and enters the locking hole 46 while elastically deforming the tongue piece 44. The hook claw 41 is restored, and the claw portion 41b and the locking edge 45 are engaged with each other. Then, the tongue piece 44 is also restored and the locking hole 46 is narrowed to restrict the movement of the hook claw in the vertical direction with respect to the inserting direction. At that time, the convex portion 42 on the back surface of the cover main body 10 and the concave portion 47 on the outer wall of the film roll chamber 26 are fitted to each other, as shown in FIG.
Since the state as shown in (d) is reached, the main body portion 4 and the front cover 3 are restricted from relatively moving in the direction orthogonal to the inserting direction of the hook claws 41, and the coupling is made more reliable. .

Therefore, even if the lens-fitted photo film unit is dropped on the ground during transportation or during use, it will not be disengaged from the hook hole, and more reliable shooting can be performed. Became. In this way, the connection between the main body 4 and the exposure unit 5 and the connection between the main body 4 and the front cover 3 are reliably maintained.

When taking a picture, first, a film winding operation is performed. The shutter charge is performed in conjunction with the film winding operation, and the release button can be pressed. Standard shooting or panoramic shooting by the operation knob 17 may be appropriately selected, framing may be performed, and then the release button may be pressed. When performing panoramic photography, the operation knob 17 is pushed rightward in the slot 18. By this pressing, the click connection between the notch 13 and the click claw 19 is released. When the operation knob 17 is further pushed to the right and slid, the panoramic field frame 12 is completely inserted into the viewfinder objective opening 23 and the notch 14 is formed.
Since the click connection with the click claw 20 is performed, the panoramic view frame 12 is maintained at the panoramic shooting position, and panoramic shooting is possible. The intermediate lever 34 is pressed while the panoramic field frame 12 is being inserted. Then, the pair of light blocking plates in the light blocking tube 32 goes up and down, and the exposure screen is switched to the panoramic size. For normal shooting,
The operation knob 17 is pressed to the left to release the click connection between the notch 14 and the click claw 20. When the panoramic field frame 12 is further retracted from the viewfinder objective opening 23 by pressing it further and the notch 13 and the click claw 19 are click-joined, the panoramic field frame 12 is maintained at the retracted position, so that normal photographing is performed. be able to.

After the photographing is finished, the film is collected in the developing station with the film still in use after use. At the lab,
The exposed film is taken out from the unit body and processed for development and printing. The maker collects the unit body from which the film has been removed, and the unit body is disassembled into multiple parts with an automatic disassembly device. For example, when the front cover 3 is separated from the main body portion 4, the tongue piece 44 is elastically deformed to widen the locking hole 46, and the claw portion 41b is pushed in the direction opposite to the locking edge 45 to move the arm portion. Elastically deforms the claw portion 41b
And the engaging edge 45 are disengaged. The front cover 3 is removed by lifting it just above the main body 4.
Also, when separating the exposure unit 5 from the main body 4,
This is done in the same way.

Since a film is loaded between the main body portion 4 and the rear cover 7, it is necessary to close the portion in a light-tight manner. It may be used for the engaging portion so that the main body portion 4 and the rear cover 7 are not separated from each other due to careless handling by the user.
In addition to the exposure unit 5 and the rear cover 7, the lens-fitted photo film unit may be made robust by using this connection not only in the exposure unit 5 and the rear cover 7 but also in other places where the conventional claw engagement is performed. Further, in the above-described embodiment, the description was made by using the locking hole formed with the square and triangular tongues, but the semi-circular tongue or the locking formed with the pin protrusion instead of the tongue. The same effect as in the above embodiment may be obtained by using the holes.

[0020]

As described above, according to the lens-fitted photo film unit of the present invention, the hook claw formed on the first part and having the elastic arm part provided with the claw part is elastically deformed. While inserting the hook claw into the locking hole formed in the second component, by restoring the arm part, the claw part is engaged with one edge of the locking hole to connect the first component and the second component. A second tongue of the attached film unit is integrally formed with an elastic tongue piece that is substantially orthogonal to the insertion direction of the hook claw and extends toward the one edge so as to partially block the locking hole. , The tongue piece is elastically deformed by pressing the tip of the hook claw to allow the hook claw to be inserted into the locking hole, and is restored when the claw part and the one end edge are engaged to lock the locking hole. Narrow to prevent the claw part from moving in the direction orthogonal to the hook claw insertion direction. Since so as to limit, each unit is no longer possible to separate by inadvertent handling of the user.

Further, the first part and the second part are each formed with a concavo-convex part which is fitted to each other in the vicinity of the hook claw and the locking hole, and the concavo-convex part is fitted by engagement of the claw part and one end edge. Since the first component and the second component are restricted from relatively moving in the direction orthogonal to the inserting direction of the hook claws, the coupling of the respective components becomes more reliable,
The reliability of the lens-fitted film unit has been greatly improved.

Moreover, if the number of times of reuse increases, if the engaging portion between the hook claw and the engaging edge is worn out, the engagement becomes slow and the parts cannot be reused. By using the coupling method used in Section 2 above for more reliable coupling than before, it is possible to increase the number of times each component can be reused, further reducing the cost of the lens-fitted photo film unit. You can contribute.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a state in which a hook claw of a main body of a lens-fitted film unit embodying the present invention and a locking hole of an exposure unit are engaged with each other.

FIG. 2 is a perspective view showing the periphery of the hook claw shown in FIG.

FIG. 3 is a side view showing the locking hole shown in FIG. 1 with a part thereof cut away.

FIG. 4 is an explanatory view showing how the hook claws of the main body and the locking holes of the front cover are engaged.

FIG. 5 is a perspective view showing a front cover of a lens-fitted film unit embodying the present invention.

FIG. 6 is a perspective view showing an internal configuration of a lens-fitted film unit embodying the present invention.

[Explanation of symbols]

 3 Front cover 4 Main body 5 Exposure unit 7 Rear cover 12 Panoramic field of view frame 29,41 Hook claw 28 Fixed frame 29a, 41a Arm part 29b, 41b Claw part 31,42 Convex part 32 Light-shielding cylinder 35, 46 Locking hole 36, 45 Locking edge 37,44 Tongue piece 38,47 Recess

Claims (2)

[Claims] 1. A hook claw having a first part and a second part molded of plastic, wherein a hook part provided with a claw part at a tip of an elastic part of the first part is integrally molded to form the arm part. While elastically deforming, the hook claw is inserted into the locking hole formed in the second part, and the claw part is engaged with one end edge of the locking hole by restoring the arm part to separate the first part and the second part. In the connected lens-fitted film unit, the second component has an elastic tongue piece that extends substantially orthogonal to the insertion direction of the hook claw and extends toward the one edge so as to partially block the locking hole. This tongue piece is elastically deformed by pressing the tip of the hook claw to allow the hook claw to be inserted into the locking hole, and is restored when the claw and the one edge are engaged. Narrow the locking hole, and hook in the direction perpendicular to the hook nail insertion direction. Film unit being characterized in that to limit to move. 2. The first part and the second part are each formed with concavities and convexities that fit together in the vicinity of the hook claw and the locking hole, and these concavities and convexities are formed by engagement of the claw portion and one edge. The lens-fitted film unit according to claim 1, wherein the first and second components are fitted together to restrict relative movement in a direction orthogonal to the inserting direction of the hook claw.