JP3146369B2 - Film unit with 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 film unit provided with a lens and having a function of exposing and winding a film and capable of immediately taking a picture of a previously loaded unexposed film.

[0002]

2. Description of the Related Art A film unit with a lens is a so-called film-integrated camera having a photographing function, which is also referred to as a "clear camera". It is used only for photographing film, and after taking out the exposed film, the camera body is discarded. Therefore, the camera body is manufactured with a simple structure at low cost.

In many cases, a camera is purchased and used on the go while traveling or the like. However, it is hard to say that the camera is convenient to carry, and the camera is provided with a photographic lens of f = 35 mm and the outer shape is 110 mm × 6.
It was about 0mm x 35mm and was inconvenient because it did not fit in the breast pocket of the shirt.

[0004]

However, despite the fact that it is a "camera clearly", the diversification of photographing purposes in recent years has enhanced the camera functions as in the case of a film unit with a lens having a built-in strobe light emitting device. There is a tendency to increase costs and increase the size of cameras.

[0005] Further, from the viewpoint of reusing resources, it has been demanded to make a camera capable of reusing a "camera clearly", that is, a reuse camera.

In order to be able to reuse the camera as it is, it is necessary to recheck the camera for quality assurance, and if only the minimum necessary parts are replaced, There is a growing demand for reusable cameras.

[0007] That is, there has been a demand for a reuse camera having means for preventing the use of only the film by refilling the film without checking the camera.

For this reason, in the case of a film unit with a lens in which the back cover is replaced with a new back cover at the time of reuse, the durability of the locking portion for attaching the back cover to the unit body has become a problem.

The present invention solves these problems and solves the above problems. As a result, the cost of the camera unit is reduced by simplifying the mechanism of the camera and utilizing the space, thereby suppressing the back cover of the film unit with the lens. An object of the present invention is to provide a film unit with a lens that improves durability and promotes reuse.

[0010]

SUMMARY OF THE INVENTION The object of the present invention is to make it possible to take a picture immediately after the film has been wound into the scroll chamber in advance, and to wind up the film one frame by the winding operation of the film winding knob, and to sequentially place the film in the cartridge chamber. It is made of plastic material that allows you to take out the patrone with the film that has been filmed and rewound inside.
A lens-fitted film unit that, with the lens
At the bottom of the back cover of the film unit,
The cartridge having a protruding rib portion, and
From the scroll chamber to the scroll chamber.
On the surface facing the camera body on the patrone room side,
Before the groove that allows the back cover to be bent corresponds to the groove
The rib portion has a cut extending from the end of the rib portion in the groove direction.
Notches are formed, and the groove
Hold the back cover to the camera body near the
This is achieved by a film unit with a lens, characterized in that an engaging member is provided .

[0011]

FIG. 1 shows the appearance of a film unit with a lens according to the present invention (hereinafter also referred to as the present camera). The present camera is provided with a 35 mm film (J135) loaded in advance. The film is sent to a developing station with the film stored in the camera without rewinding, the film is taken out from the camera, and the film is developed and printed.

The unexposed film used in the camera is loaded by a loading method described later. In the loaded state, the film is wound around a spool from a patrone,
Each time a picture is taken, it is wound up in the patrone by winding up. Therefore, in the photo lab, the photographed film can be taken out of the camera in a bright room.

[0013] Also, taking out the photographed film can be easily performed only by bending a part of the back cover. Therefore, the camera portion is checked, a new unexposed film is loaded, and the back cover is removed by the manufacturer. If replaced, it can be reused.

As the patrone loaded in the camera, a patrone having an outer diameter of φ20.6 mm different from a commonly used patrone (JIS K7528) is used.

As a result, the thickness of the camera can be suppressed to about 24 mm except for the lens barrel having the photographing lens, thereby realizing an ultra-thin compact camera.

The present camera is provided with a cardboard carton (paper cover) on which a product name, a simple usage method, and the like are displayed on a part of its outer surface.

FIG. 2 is a developed view showing the structure of the camera.

Reference numerals 10, 20, and 30 denote a camera body, a front cover, and a back cover, respectively, which are main components of the camera. Reference numeral 40 denotes a strobe unit as a built-in strobe light emitting device. These are the film winding, sector charge and film counter mechanisms, respectively.

The camera main body 10 is provided with a film winding mechanism 50, a sector charging mechanism 60, and members constituting a film counter mechanism 70 when mounted alone, and a shutter case 11 for accommodating a sector.

The shutter case 11 is fixed by engaging claws 11A protruding on both sides with a locking portion 10A on the front surface of the camera body 10, and connects the sector to the sector charging mechanism 60.

Further, on the front surface of the shutter case 11, a photographing lens 12 having a focal length f = 30 mm and having a stop of f / 9.5, which is a single lens having a focal length f = 30 mm, is provided with a slide 13A which engages with a guide pin 11B. Covered by the lens holder 13.

The camera body 10 and the shutter case 11 described above.
Is molded from a black matte plastic material having some elasticity, including the front cover 20 and the back cover 30 described above.

On the other hand, the strobe unit 40 is mounted and supported on the basis of holes 40A and 40B on the board which engage with guide pins 10B and 10C on the front of the camera body 10, respectively.

The strobe unit 40 is composed of an AA battery serving as a strobe charging power source by protruding the upper and lower battery contact pieces 41, which are integrated, into the battery chamber on the back of the camera body 10 through the upper and lower slit holes 10D. A certain battery power supply E is sandwiched.

The integrated main capacitor C is stored in a capacitor chamber formed below the shutter case 11.

The lens holder 13 and the strobe unit 40
Is fixedly integrated with the camera body 10 by mounting the front cover 20 on the camera body 10.

Prior to mounting the front cover 20 on the camera body 10, a finder objective lens 21 is dropped on the front surface thereof in advance, and is fixed by engaging a decorative cover 22. The decorative cover 22 has a guide pin 22A and four claws 22B protruding from the rear surface thereof.
It is engaged with the locking portion 20B at the location and is attached.

The front cover 20 is further mounted on the front surface of the camera body 10 after engaging and mounting an eyepiece 23 of a finder on the rear surface.

The front cover 20 has a hole 20C, a claw 20D, and three locking portions 20E on the rear surface. The guide pin 10E and the claw 10F on the entire surface of the camera body 10 and the locking portion 10G on the side surface. Engage and attach.

The lens cover 13 and the flash unit 40 are fixed to the camera body 10 by engaging the front cover 20 with the camera body 10.

The camera body 10 with the front cover 20 attached
The cartridge P1 and the spool S2 with the leading end of the unexposed film F are respectively loaded into a patrone chamber and a scroll chamber (both not shown) formed on the back surface thereof.

The other end of the film F is locked on a spool S1 in a cartridge P1, and even if the film in the cartridge is once wound up by a spool S2 after the film is loaded, the other end is locked on the spool S1. Therefore, it can be wound into the patrone P1 every time the photographing is completed.

A back cover 30 is attached to the back of the camera body 10 loaded with the film F, so that the position of the film F on the light-shielding focus surface is regulated.

The back cover 30 has claws 30A and 30B on the front surface and locking holes 30C and 30D on the side surface.
The claw 30A and 30B are the locking parts of the camera body 10
One holes 30C and 30D and one hole (not shown) are engaged with and fixed to the hooks 10K and 10L of the camera body 10 and one hole (not shown) at 10H and 10J.

After the back cover 30 is mounted, a predetermined film winding operation is performed to set a photographable screen, and the carton shown in FIG. 1 is mounted to complete the screen.

Next, the details of the film winding mechanism 50, the sector charging mechanism 60, and the film counter mechanism 70 will be described.

FIG. 3 shows the above-described respective mechanisms at an angle as viewed from the back side of the camera, and FIG. 4 shows the mechanism with the patrone and the spool in which the film is wrapped, as viewed from the direction of inserting the spool into the camera body. It is a thing.

The camera body 10 has a patrone chamber 15 as two storage chambers for film winding and film loading in the same plane on both sides of a screen frame 16 as an exposure unit.
A and a scroll chamber 15B are provided, and J135 is caught in a patrone P1 which is a storage container shown in FIG.
The film F is to be loaded.

A film F used in the camera of this embodiment is a roll film J135 or a slightly thin roll film of 130 to 140 μm like a general camera, and a spool of the cartridge P1 is previously stored in a dark room or the like using the cartridge as a storage container. The end portion is fixed to S1, and a predetermined number of frames are wrapped in a length that can be photographed, and a film of a certain length comes out from the film drawer of the cartridge P1. The film in this state is loaded into the camera. The loading method will be described below.

The patrone P1 is loaded into the patrone chamber 15A such that the spool S1 of the patrone P1 engages with the fork of the hoisting fork 52. On the other hand, the spool S2 is also inserted into the scroll chamber 15B. Then, in this embodiment, the film F is pulled out until the tip of the film notch FN of the film F matches the index 17A at the lower portion of the lower rail surface, and the tip of the film F is inserted into the slit SL of the spool S2. The perforations P are locked to the claws H. The film notch FN has a number of holes formed in the tongue portion at the leading end of the film to indicate the emulsion lot number and the like of the film.

Next, the back cover 30 is put on the back cover 30 to make the cover light-tight.
Then, the camera in this state is mounted on the film winding device, and the entire film F (with the other end not being detached from the spool S1 of the cartridge P1) is moved to the scroll chamber 15B.
And the loading of the film is completed. That is, by loading the film F in this manner, the film F is sequentially wound into the patrone P1 for each photographing, and after the photographing of a predetermined number of frames is completed, in this embodiment, two frames are skipped. Thus, the photographed film portion is completely wrapped in the patrone P1, leaving the required length without being wrapped in the patrone. Therefore, this patrone can be taken out of the camera in a bright room.

Next, the mechanism of the main body will be described.

In the camera body 10, a film winding mechanism 50 including a photographing lens 12, a sector charging mechanism 60,
The main mechanism of the film counter mechanism 70 is incorporated therein.

First, the film winding mechanism and the sector charging mechanism will be described.

Reference numeral 51 denotes a film winding knob. The film F loaded as described above is wound by turning the film winding knob 51 counterclockwise. A cam 55 coaxial with an eight-tooth sprocket gear 54 meshing with the perforation P of the film F and having a fan-shaped cam portion 55B at the bottom.
Is rotated exactly one turn in the counterclockwise direction by winding the film.

That is, the film is wound up with the length of eight perforations, which is the number of teeth of the sprocket gear, as one frame, and the frame size is a so-called full size frame size of 24 × 36 mm.

The rotation of the cam 55 in the counterclockwise direction naturally rotates the sector cam portion 55B in the counterclockwise direction as described above, and in the process, the charge lever 61 is moved by the sector cam portion 55B to the charge lever shaft 63. Is rotated clockwise against the spring force of a charge lever spring 64 that urges the counter lever in a counterclockwise direction, and the rising portion 65B of the sector lever 65 is rotated by a triangular ketobashi 61C provided on the charge lever 61.
Is pressed, and eventually the vehicle gets over the rising portion 65B to charge the sector charging mechanism as shown in the figure.

The pin 65C of the sector lever 65 and the camera body 10
A sector spring 67 is stretched between the pins 18C provided on the sector lever 67.
The left end of the long hole is brought into contact with a pin 18B provided on the camera body 10 that guides the long hole slidably and rotatably, and the sector lever
The arm plate 65D provided on the camera body 10 is provided with a pin 18 provided on the camera body 10.
It comes into contact with E. A sector drive pin 65A for operating a sector 66 pivotally supported by a sector pin 18D provided on the camera body 10 is inserted into the fork of the sector 66.

As will be described later, the cam stopper after photographing is completed
The protrusion 62D of 62 is pulled out from the groove 55A of the cam 55,
The arm portion 57A of the hoisting stopper 57 changes from the state shown in the figure to change the arm portion 61A of the charge lever 61 and the arm portion of the cam stopper 62.
It comes off from each edge of 62A, and is in contact with the end face of the arm 61A by the spring force of the hoisting stopper spring 58 that urges clockwise. When the cam 55 rotates just once by the film winding as described above and the groove 55A of the cam 55 returns to the initial position, the spring force for urging the cam stopper 62 by the horizontal end of the charge lever spring 64 in the clockwise direction. As a result, the projection 62D of the cam stopper 62 jumps into the groove 55A. By this jumping operation, the locking of the arm portion 57A of the hoisting stopper 57, which has been locked on the end surface of the arm portion 62A of the cam stopper 62 at this time, is released.

The outer peripheral cylindrical surface of the film winding knob 51 is a ratchet gear, and the V-shaped projection at the tip of the winding stopper 57 is released by the release of the lock so that the ratchet gear is actuated by the spring force of the winding stopper spring 58. The film winding knob 51 jumps into the tooth space of the gear 51A, thereby preventing the film winding knob 51 from rotating in the counterclockwise direction. That is, when the film winding is completed, the film winding knob 51 is prevented from rotating further.

In the camera body 10, the tip of a reverse rotation preventing claw 53 utilizing the elasticity of a resin material is pressed against the ratchet gear 51A so as to prevent the film winding knob 51 from rotating in the opposite direction of winding. It has become.

By pressing the release button 25 of the front cover 20, a release button pin 25A implanted on the back of the release button 25
Operates in the direction of arrow A. That is, the front cover 20
When the camera is attached to the camera body 10,
By the operation of the tip of the release button pin 25A in the direction of arrow A described above, the hoisting stopper 57 rotates counterclockwise against the spring force of the hoisting stopper spring 58. Then, the arm portion of the charge lever 61 is moved from the end surface of the arm portion 57A of the hoisting stopper 57.
The edge of 61A is disengaged and the charge lever 61, and thus the cam stopper 62, is rotated counterclockwise by the spring force of the charge lever spring 64.

Then, the counterclockwise rotation of the charge lever 61 by the spring force of the charge lever spring 64 stronger than the sector spring 67 causes the charge lever 61 to rotate.
C hits the rising portion 65B of the sector lever 65 and comes off the rising portion 65B. Therefore, the sector lever 65 rotates clockwise around the pin 18B in the long groove of the sector lever against the tensile force of the sector spring 67, and
It returns to its original state due to the tensile force. Therefore, the sector drive pin 65A
Turns the sector 66 around the sector pin 18D, exposes the film, and closes it.

On the other hand, the cam stopper 62 also rotates counterclockwise together with the charge lever 61 as described above,
The projection 62D of 62 comes out of the groove 55A of the cam 55. Therefore, even if you stop pressing the release button,
The arm portion 57A of the charge lever 61 is urged clockwise by the spring force of the hoisting stopper spring 58.
Is stopped by the end face of
The projection does not lock the ratchet gear 51A of the hoisting knob 51. Therefore, the next film winding can be performed.

Next, the film counter mechanism will be described.

As described above, reference numeral 72 engages with the V groove 56A provided at the upper end of the cam shaft 56 implanted in the cam 55 which rotates integrally with the sprocket gear 54, so that the film is wound up by one frame and the cam shaft 72 is rotated. Reference numeral 56 denotes an index gear that rotates clockwise by one tooth for each rotation.

On the upper surface of the index plate gear 72, an index plate 71 is printed as an integrally formed product, and the remaining number of shootable films is displayed from the film counter window 26 on the upper surface of the front cover 20.

A projection 72A is provided on the lower surface of the index platen gear 72. When the film is wound up after a predetermined number of frames have been photographed, the projection 72A is brought into contact with the projection 61 of the charge lever 61.
E and another protrusion 62 </ b> E of the cam stopper 62, so as to break and enter. Then, the protruding portion 72 </ b> A is
The film is wound up by one frame by entering between E and 62E, and even when the cam 55 rotates once and the charging of the sector is completed, the two projecting portions 61E and 62E are brought into contact with the projecting portion 72A of the index wheel gear 72. The movement is blocked, the charge lever 61 cannot be operated, and the protrusion 62D of the cam stopper 62 is also in the groove of the cam 55.
You will not be able to jump into 55A. The arm portion 57A of the hoisting stopper 57 abuts on the end surface of the arm portion 62A of the cam stopper 62 by the spring force of the hoisting stopper spring 58, and the V-shaped protrusion at the tip of the hoisting stopper 57 locks the ratchet gear 51A. Also, it is impossible to operate the charge lever 61 to open and close the sector to expose the film.

As described above, in this embodiment, when two frames of the film are fed, the index gear 72 is rotated by two teeth. By this rotation, the projection 72 of the index gear 72 is rotated.
A is a charge lever that presses the protrusion 61E.
The movement of 61 is prevented, but another protrusion 62 of the cam stopper 62
It comes out of E. Therefore, the protrusion 62D
Jumps into the groove 55A of the cam 55, the locking of the hoisting stopper 57 is released, the hoisting knob 57 is locked by the hoisting stopper 57, and the film cannot be wound. Since the movement of the charge lever 61 is blocked as described above, the film cannot be exposed. In this way, the tongue at the leading end of the film is prevented from being caught in the cartridge, and the tongue of the required length is secured. Therefore, in order to make the camera compact, there is no problem in drawing out the film from the patrone at the time of development even if a patrone having a small outer diameter is used.

Here, the position of the groove for bending the back cover 30 when taking out the patrone provided on the back cover 30 will be described.

FIG. 5 is a diagram showing the removal of the film from the camera. In FIG. 5, holes 30C of the back cover 30 correspond to claws 10K of the camera body 10, and claws 30A and 30C of the back cover 30 shown in FIG.
B engages with the locking portions 10H and 10J of the camera body 10, and inserts a pointed screwdriver-like bracket into this hole or the engaging portion between the locking portion and the claw to perform this engagement. Remove
The back cover 30 is bent from the groove 32 of the back cover 30 by leaving the engagement portion between the other hole of the back cover 30 and the other claw of the camera body 10 as it is.
Push 30 from state I to state II. Engagement claw 30
The portions corresponding to A and 30B may be disengaged by removing 30C. In this embodiment, the nails 30A and 30B are automatically turned to the locking portions 10H and 10J by raising the patrone room side of the back lid so that the nails 30A and 30B are bent in the direction shown in the drawing. Come off. However, it does not come off unless the 30C is disengaged, and plays a role of solidifying the camera during normal use. Then, the cartridge P1 in which the photographed film with the tongue is entangled is taken out from the camera body in the direction of arrow B. And, in the case of a patrone having a small diameter as in this embodiment, if the tongue has been caught in the patrone at the time of film development in a developing laboratory, the work of pulling out the film from the patrone is Because of the difficult operation, this camera has a winding structure that prevents the tongue from getting caught in the patrone as described above. That is, in the present camera of the embodiment, if two frames of film are fed after the end of shooting as described above, the function as the camera is stopped, and the film cannot be wound up or released, so that the tongue is placed in the patrone. Prevents getting caught. In the laboratory, not only the back cover 30C but also the back cover 30A and 30B may be configured to be bent unless the engagement is released by some means. In this case, there is an effect that the user cannot easily mischief.

In order to shorten the substantial length of the tongue so as not to waste the film, it is natural that the shorter the space between the cartridge chamber 15A and the scroll chamber 15B, the better. Similarly, in order not to waste the film, it is preferable to dispose the screen frame 16 next to the patrone room 15A. If a battery chamber or a condenser chamber for strobe is provided between the patrone chamber 15A and the screen frame 16, if the unmoved portion of the film is brought to the screen frame 16, the amount of movement of the film is not so. As a matter of course, the length of the film wound into the patrone needs to be longer. That is, in order not to waste the film, it is better that the interval between the patrone chamber 15A and the scroll chamber 15B is short,
Further, an arrangement in which the screen frame 16 is located next to the patrone room 15A is preferable. Also, in order to at least put out the patrone with the tongue out, the groove should be closer to the scroll chamber than the picture frame.

When the patrone with the tongue is bent and taken out at the groove position provided in the back cover, the back cover may be naturally opened to make it easy to take out. For that purpose, it is better that the groove position where the back cover is bent is located at a position away from the open end of the back cover.

If the groove position is longer than the open end of the back cover, the back cover is locked to the camera body by the lever principle and the large curvature of the back cover when the back cover is bent at the groove position. When the camera is reused, the back cover is replaced with a new one, so there is no problem, but the nails on the camera body will be damaged. Therefore, it is better for this groove position to be shorter from the open end of the back cover.Because it is short, the force to bend the back cover with the groove can be concentrated in the groove, and the back cover is less curved so The force applied to the nails of the locked camera body is small, so that the nails are less likely to be damaged. That is, the reuse of the camera body is advanced accordingly.
If the length of the groove is too short, it takes a lot of force and takes a long time to process, and there is a risk that the nail or the hole of the engaged portion of the main body may be broken in an attempt to force the operation. .

According to the experimental results according to the present embodiment, the groove position of the back cover where the claw (engaging portion) of the camera body is less damaged is 70 mm or less (particularly 60 to 70 mm) from the open end of the back cover. Good results were obtained.

FIG. 6 is a view showing another embodiment in which the rib size of the back cover is changed, wherein the rib width D2 on the open side is larger than the rib width D1 on the fixed side of the back cover to the camera body. It is. By doing so, the curvature of the open-side back cover at the time of bending is small, so that the nail of the camera body is less likely to be damaged.

[0067]

According to the present invention, the camera back cover can be easily opened.
As a result, a film unit with a lens that facilitates taking-out of a photographed film has been provided.

[Brief description of the drawings]

FIG. 1 is an external view of a film unit with a lens according to the present invention.

FIG. 2 is a development view showing a configuration of a film unit with a lens according to the present invention.

FIG. 3 is a perspective view of mechanisms such as a camera body and a front cover of the lens-fitted film unit according to the present invention as viewed from the rear side.

FIG. 4 is a perspective view of a film used for a film unit with a lens according to the present invention.

FIG. 5 is a view showing the removal of the film from the lens-fitted film unit according to the present invention.

FIG. 6 is a view showing another embodiment in which the rib size of the back cover of the film unit with lens according to the present invention is changed.

[Explanation of symbols]

 10 Camera body 10K Claw 15A Patrone room 15B Scroll room 16 Screen frame 30 Back cover 30C Hole 32 Groove P1 Patrone D1, D2 Rib width

Continuation of the front page (56) References JP-A-60-138523 (JP, A) JP-A-62-99041 (JP, U) JP-A-62-116239 (JP, U) JP-A-63-148932 (JP) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03C 3/00

Claims (1)

(57) [Claims] 1. A film is previously wound into a scroll chamber, so that photographing can be immediately performed, and a film is wound up by one frame by a winding operation of a film winding knob, and is sequentially rewound into a patrone of a patrone chamber. Plastic cartridge that allows the removal of the patrone
A lens-fitted film unit made of a stick material , wherein a bottom of a back cover of the lens-fitted film unit is provided.
The surface has a rib protruding toward the camera body, and
The scroll chamber side of the back lid with respect to the patrone chamber
And the cartridge on the patrone chamber side of the scroll chamber.
The back cover can be folded on the surface facing the camera body.
The groove corresponding to the groove has a rib end portion.
Notches extending in the groove direction are formed respectively.
At the same time, at the position near the scroll chamber side of the groove,
A film unit with a lens, comprising an engagement member for holding a lid on a camera body side .