JPH11142928A - Film unit with lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a film unit with a lens capable of engaging a winding knob with a spool, without need of positioning at any angle and using a conventional engaging mechanism as well. SOLUTION: A engaging hole 32 to be engaged with the engaging shaft 35 of the winding knob 5 is integrally provided on one end of the spool 26. In the engaging hole 32, a one-tooth notch 33, which are provided in an ordinary camera, to be engaged with a rotary shaft for rotating the spool of an APS photographic film cartridge and a dentition 32a to be engaged with the engaging teeth 35a of the engaging shaft 35 of the film unit with the lens 2 are integrally formed.

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, and more particularly to a shape of an engaging portion between a film winding knob for winding a photographic film into a cartridge body and a spool of the photographic film cartridge.

[0002]

2. Description of the Related Art In recent years, the applicants have issued an Advanced Photo
"Shaun Run Super Slim (trade name)" and the like loaded with a photo film cartridge compatible with System (APS) are manufactured and sold. In such a film unit with a lens, each time a photograph is taken, a disc-shaped winding knob engaged with a spool of the cartridge is operated to rotate the exposed photographic film portion into the cartridge to take an unexposed photographic film. Set the top behind the aperture.

A winding knob for winding up one frame is provided with a disc-shaped operation dial partially exposed from the back of the film unit with a lens, and is integrally protruded from the lower surface of the operation dial to form a spool of a photographic film cartridge. An engagement shaft which penetrates into an engagement hole provided at the end and engages with this spool.

Conventionally, the engagement between the take-up knob and the spool is conventionally achieved by a one-tooth notch extending outward from the inner wall of the engagement hole of the spool, and a cylindrical member fitted to the notch. This is performed by engaging with an engagement shaft having a protruding portion that protrudes a part of the shaft.

[0005]

However, in the engagement between the notch of one tooth of the engaging hole and the engaging shaft fitted in the notch, the entire circumference of the engaging hole and the engaging shaft is engaged. The winding knob and the spool can be engaged only at one specific position within 360 °. For this reason, at the time of manufacturing the film unit with the lens, the position of the notch of one tooth of the engaging hole and the position of the protruding portion of the engaging shaft fitted into this notch are detected, and the notch and the protruding portion are detected. A positioning device is used in which the angles of the parts are matched and fitted.

[0006] However, such a positioning device is generally expensive, and the assembly process is complicated since the winding knob is engaged with the spool after positioning, and the manufacturing cost of the lens-fitted film unit is reduced. Was causing the increase.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to engage a winding knob and a spool without positioning at any angle, and to use a conventional engagement mechanism. It is an object of the present invention to provide a lens-fitted film unit.

[0008]

According to the present invention, in order to achieve the above object, according to the first aspect of the present invention, one tooth of a single tooth which is rotatably incorporated in a patrone main body and extends outward from an inner wall is provided. By rotating a spool formed with an engagement hole having a notch at an end portion, a photo film cartridge of a type in which the photo film is sent out of the cartridge body from the film entrance is housed, and a lower surface of a disk-shaped operation dial is stored. In a film unit with a lens having a winding knob in which an engagement shaft penetrating into the engagement hole is integrally formed, a tooth row is provided on an inner peripheral wall other than a cutout of the engagement hole, and a engagement of the winding knob is provided. An engaging tooth meshing with the tooth row of the engaging hole is provided on the outer peripheral surface of the joint shaft, and the spool is rotated without engaging with the notch by rotating the winding knob. It is intended that enables.

According to the second aspect of the present invention, the height of each tooth of the end of the tooth row and the end of the engaging tooth is gradually increased.

[0010]

FIG. 2 is an external perspective view showing a film unit with a lens embodying the present invention, and FIG.
Is an exploded perspective view thereof. The lens-fitted film unit 2 includes a unit main body 3 having a built-in photographic film cartridge and various photographing mechanisms, and an exterior body 4 enclosing the unit main body 3. The exterior body 4 has a contour that exposes the hoist knob 5, shutter button 6, strobe light emitting section 7, and the like of the unit main body 3. Also, taking lens 8,
Holes for exposing the viewfinder 9 and the number-of-images-displaying window 10 are provided so that a photographing operation can be performed with the unit body 3 wrapped by the exterior body 4.

As shown in FIG. 3, the unit main body 3 includes a main body base 12, a rear cover 13, a photographing mechanism 14, a strobe unit 15, and a front cover 16.
On the front surface of the main body 12, a photographic lens 8, a shutter mechanism, a shutter charging mechanism, a locking mechanism, and the like are provided on the mechanical base 1.
7, a unitized photographing mechanism 14 is attached. The rear cover 13 is assembled behind the main body base 12 to house the photographic film cartridge 18 between the main body base 12 in a light-tight manner.

The front cover 16 is attached to the front of the base 12. A shutter button 6 is provided on the upper surface of the front cover 16 so that a part of the shutter button 6 is cut out to be elastic. A pressing rod 19 is integrally provided below the shutter button 6.
9 presses the components of the photographing mechanism 14 to operate the shutter mechanism.

An exposure opening 31 is formed at the center of the main body base 12, and a photographing mechanism 14 is provided in front of the exposure opening 31.
Is attached. On both sides of the exposure opening 31, a cartridge chamber 21 for accommodating the cartridge body 20 of the photographic film cartridge 18 and a cartridge body 20 are provided.
A film roll chamber 23 for accommodating a film roll 22a formed by rolling the unexposed photographic film 22 drawn out of the photographic film 22 is integrally formed.

The bottom surfaces of the cartridge chamber 21 and the film roll chamber 23 are open surfaces, respectively. After the photographic film cartridge 18 is loaded, the bottom lids 28 and 29 are provided integrally with the rear cover 13, respectively. Will be blocked. Then, on the upper rear surface of the main body base 12,
The reverse rotation preventing claw 25 is formed integrally.

As shown in FIG. 4, a photographic film cartridge 18 is an advanced photo system (AP), which is a new type of photographic system that has become popular in recent years.
S)), and details of the configuration and the like are described in, for example, JP-A-6-301157. The cartridge body 20 is formed of a light-shielding plastic, and has a built-in film feeding mechanism as disclosed in JP-A-6-266053.

The cartridge body 20 accommodates all of the photo film 22 inside when not in use, and the spool 2 engaged with one end of the photo film 22 when in use.
The photographic film 22 is sent out by the rotation of 6.
Further, a light-shielding lid 20a which is turned when the entire photo film 22 is rolled up and shields the inside of the cartridge body 20 from light is attached to the film entrance 20b from which the photo film 22 is pulled out.

The photographic film 22 is provided with two perforations 22b for one photographing frame, and a two-tooth sprocket (not shown) incorporated in the photographing mechanism 14 engages with these to form a winding. The stop mechanism operates to lock the winding knob 5. The shutter charge is performed in conjunction with the film feeding during this time. Then, the photographing is performed by the shutter release operation, and thereafter, by repeating this, the photographing is sequentially performed from the rear end side (the side locked to the spool 26) of the photographic film 22 toward the front end side. .

As shown in FIG. 1, one end of the spool 26 is integrally provided with an engagement hole 32 which engages with an engagement shaft 35 of the winding knob 5 which will be described in detail later. This engagement hole 3
2 is provided with a one-tooth cutout 33 which is provided in a normal camera and engages with a rotation shaft for rotating a spool of the APS photographic film cartridge, and an engagement shaft 35 of the lens-fitted film unit 2 of the present invention. Are integrally formed with the engagement teeth 35a and the teeth 32a to be engaged.

The tooth row 32a has a notch 33 in the engagement hole 32.
It is provided so as to surround the other inner wall. An end of each tooth constituting the tooth row 32 a forms an insertion portion 32 b which is obliquely cut so that the height of the tooth gradually increases toward the depth of the engagement hole 32.

The hoisting knob 5 engaged with the engaging hole 32 is rotatably mounted on the upper surface of the cartridge storage chamber 21. The hoisting knob 5 is a disc-shaped operation dial 3 around which a tooth row 36a also serving as a finger hook is integrally formed.
6 and an engagement shaft 35 integrally protruding from the lower surface of the operation dial 36. Around the engagement shaft 35, engagement teeth 35a meshing with the above-described tooth row 32a of the spool 26 are provided integrally. The ends of the teeth forming the engaging teeth 35a are obliquely cut out so that the height of the teeth gradually increases toward the operation dial 36.
forming b

With the above configuration, as shown in FIG.
The winding knob 5 penetrates into the spool 26 of the photographic film cartridge 18 loaded in the cartridge chamber 21 of the lens-fitted film unit 2 through the insertion hole 21a on the upper surface of the cartridge chamber 21, and the tooth row 32a of the engagement hole 32.
And the engagement teeth 35a of the engagement shaft 35 mesh with each other. Thus, when the operation dial 36 is rotated, the spool 26 is integrally rotated.

Then, from the rear cover 13 to the unit body 3
The spool 26 is rotated in the film winding direction by rotating the operation dial 36, which is partially exposed to the outside, in the normal rotation direction (the direction in which the photographic film 22 is wound into the cartridge body 20). Is stored in the cartridge body 20. Note that a tooth row 36a provided around the operation dial 36 is provided.
By engaging with the reverse rotation preventing claw 25, the reverse rotation operation is prevented.

Next, the operation of the above configuration will be described.
In the mounting step of the winding knob 5 at the time of manufacturing the lens-fitted film unit 2 of the present invention, the photographic film cartridge 1 already loaded into the cartridge chamber 21 in the previous step is inserted through the insertion hole 21a on the upper surface of the cartridge chamber 21.
The engaging shaft 35 is inserted into and engaged with the engaging hole 32 of the spool 26 of No. 8.

At this time, in the conventional lens-equipped film unit, the projection provided on the engagement shaft of the winding knob is engaged with the notch of one tooth provided in the engagement hole at the end of the spool. In the positioning device, the position of the notch of the spool and the position of the protruding portion of the engaging shaft are detected by the positioning device, and the engaging shaft is rotated so that the protruding portion matches the position of the notch,
After matching the angle of the notch with the angle of the protruding portion, the winding knob 5 is inserted and attached.

However, in the film unit with lens 2 of the present invention, as shown in FIG.
Of the spool 26 is provided with a continuous tooth row 32a which meshes with the engagement tooth 35a. It can be inserted and engaged no matter where the angle with the engagement shaft 35 is. Therefore, the winding knob 5 can be easily attached to the engagement hole 32 of the spool 26 without attaching the winding knob using an expensive positioning device or the like in the attaching process of the winding knob. Further, it is possible to significantly reduce the occurrence of mounting failure due to a positioning error of the winding knob, which may occur in the conventional manufacturing process.

On the other hand, by engaging the continuous teeth with each other, the engaging force itself becomes weaker than the engaging force due to the combination of the notch of one tooth and the protruding portion. Before the photographic film is abnormally pulled and damaged, the engaging portion between the engaging shaft 35 of the winding knob 5 and the engaging hole 32 of the spool 26 is broken first, which is called cutting of the photographic film. The worst case is avoided.

The photographic film cartridge 18 used in the above-described lens-fitted film unit 2 of the present invention has a conventional one-tooth notch 33 as shown in FIG.
Is provided as it is, and the inner diameter surrounded by the tooth row 32a is formed so as to be the same as the inner diameter of the engaging hole of the conventional spool. Even if it is set, a rotating shaft 41 having a general one-tooth protrusion 42 for rotating the spool
Can be engaged with the engagement hole 32 of the spool 26 without any problem, and the spool 26 can be rotated.

In the above-described first embodiment, the engaging shaft 35 of the winding knob 5 is provided with the continuous engaging teeth 3 extending in the axial direction.
5a, and also in the engagement hole 32 of the spool 26,
A continuous tooth row 32a extending in the axial direction, which engages with the engagement teeth 35a, is formed.
As shown in FIG. 7, an engaging tooth 53 perpendicular to the engaging shaft 52 is formed on the upper portion of the engaging shaft 52 of the winding knob 51 so as to surround the engaging shaft 52.
May also be formed at the end of the tooth row 57 at right angles to the rotation axis direction. The engaging teeth 53 of the engaging shaft 52 and the engaging holes 5
When the hoisting knob 51 is rotated by meshing with the sixth tooth row 57, the spool 55 also rotates integrally.

Further, in each of the above embodiments, the shape of each of the teeth of the engaging shaft and the teeth of the engaging holes meshing with the engaging shaft is triangular. Any tooth shape may be used.

[0030]

As described above, according to the present invention, an engagement hole having a one-tooth cutout which is rotatably incorporated in the cartridge body and extends outward from the inner wall is formed at the end. By rotating the spool, the photographic film patrone of a type in which the photographic film is sent out of the patrone body from the film entrance and exit is housed, and an engaging shaft penetrating into the engaging hole is integrally formed on the lower surface of the disc-shaped operation dial. In the film unit with a lens having a winding knob protruding from the lens, a tooth row is provided on an inner peripheral wall other than the notch of the engaging hole, and the teeth of the engaging hole are formed on an outer peripheral surface of an engaging shaft of the winding knob. Providing engagement teeth that mesh with the row,
Since the spool can be rotated without engaging the notch by the rotation of the winding knob, the winding knob and the spool can be engaged without positioning at any angle, and Thus, it is possible to provide a film unit with a lens that can also use a conventional engagement mechanism.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the vicinity of an engagement portion between a winding knob and a spool of a film unit with a lens according to the present invention.

FIG. 2 is a perspective view showing an appearance of a film unit with a lens.

FIG. 3 is an exploded perspective view showing a configuration of a film unit with a lens.

FIG. 4 is a perspective view showing a photographic film cartridge.

FIG. 5 is an exploded perspective view showing a cartridge storage portion.

FIG. 6 is an explanatory view showing the engagement between the winding knob and the spool of the lens-fitted film unit of the present invention.

FIG. 7 is an explanatory view showing engagement between a conventional general spool rotation shaft and a spool in the present invention.

FIG. 8 is a perspective view showing a second embodiment of the present invention.

[Explanation of symbols]

 2 Film unit with lens 5 Wind-up knob 18 Photo film cartridge 26 Spool 32 Engagement hole 32a Tooth row 33 Notch 35 Engagement shaft 35a Engagement tooth

Claims (2)

[Claims] 1. A photographic film by rotating a spool rotatably incorporated in a patrone body and having an engagement hole having a one-tooth notch extending outward from an inner wall. A photographic film patrone that sends out the film from the film doorway to the outside of the patrone body is housed, and a lens having a winding knob on the lower surface of the disc-shaped operation dial, which is integrally provided with an engaging shaft that penetrates the engaging hole. In the film unit, a tooth row is provided on an inner peripheral wall other than the notch of the engaging hole, and an engaging tooth meshing with the tooth row of the engaging hole is provided on an outer peripheral surface of an engaging shaft of the winding knob. A film unit with a lens, wherein the spool can be rotated without engaging with the notch by rotating a winding knob. 2. The lens-fitted photo film unit according to claim 1, wherein the height of each tooth of the end of the row of teeth and the end of the engaging tooth is gradually increased.