JP3200709B2 - Film loading method for 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 loading method for a film unit with a lens having an exposure and film winding function 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". Since the camera body is used only for photographing the film and the exposed body of the camera is discarded after taking out the film, the camera body is manufactured with a simple structure at a low cost.

[0003]

However, in spite of the simple structure, the film winding operation performed every time photographing is performed is not limited to the film feeding resistance, but also includes the setting of a shutter and the movement of a film counter and other mechanical parts. Since a load is applied, the camera used by women and children tends to have a large load. In addition, there has been a demand for a camera that can be reused without being disposable, in a demand for resource saving. In particular, as described in the following embodiments, a relatively thin film is used, and a 9 to 10 mm diameter spool is inserted inside a patrone having an outer diameter of 18 to 21 mm in order to make the camera thinner. Since a spool with a diameter of ~ 11mm was used, and the parts were packed narrowly, the hoisting torque tended to be high.

[0004] The present invention has solved and improved the above points,
Film loading of a film unit with a lens that reduces the film feeding resistance and makes the winding operation light and easy
It is intended to provide a method .

[0005]

The object of the present invention is to provide a patrone.
Unexposed film is wound beforehand onto the winding shaft of the film winding chamber.
Film loading of film unit with lens to be raised
The method comprises rotating the winding shaft in a winding direction.
The unexposed film is wound on the winding shaft to be wound.
After the completion of winding, the winding direction of the winding shaft is opposite to the winding direction.
The unexposed film in the wound state is rotated by the
Release from the take-up shaft to make a bull winding state.
Characteristic film loading method for film with lens
Is achieved.

[0006]

FIG. 1 shows the appearance of a film unit with a lens of the present invention (hereinafter also referred to as the present camera), that is, a film-integrated camera. The camera is pre-loaded with 35 mm film (J135) and sold. After the shooting, the film is sent to the lab without rewinding and stored in the camera, where the film is developed and printed.

[0007] The unexposed film used in the camera is loaded in a state in which it is contained in a patrone, and after the camera is made light-tight, the film is wound by a driving means such as a film winding device . The take-up shaft on the take-up chamber side is driven to take up all the film in the patrone into the film take-up chamber. The user winds up the photographed film in the patrone by winding the film every time the photographing is performed. Therefore, in the lab, the film that has been photographed can be taken out of the camera in the light room without changing the patrone.

[0008] In addition, taking out the photographed film,
This can be easily performed by bending a part of the outer shell member. Therefore, if the manufacturer replaces the back cover, a new unexposed film can be loaded and reused, that is, used as a reuse camera.

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. The following description will be made using this small patrone, but the present invention is not limited to this and can be applied to a normal patrone.

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 camera is provided with a cardboard carton 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 configuration of the camera.

Reference numerals 10, 20, and 30 denote a camera main body, a front cover, and a back cover, respectively, which are main components of the camera. Reference numeral 40 denotes a built-in flash unit.
Numerals 70 and 70 denote film winding, sector charge and film counter mechanisms, respectively.

The camera 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 and having a focal length f = 30 mm is dropped and 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 made of 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 respectively engage with guide pins 10B and 10C on the front of the camera body 10.

The strobe unit 40 is constructed such that upper and lower battery sections 41 are inserted into upper and lower slit holes 10D of the camera body 10 and protrude into a battery chamber on the back side of the camera body 10 so that an AA battery E as a strobe charging power source is provided. Sandwich.

The integrated 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, the objective lens 21 of the finder is dropped on the front surface of the front cover 20 in advance and fixed by the engagement of the decorative cover 22. The makeup cover 22 has a guide pin 22A and four claws 22B on the back.
With holes 20A and 4 on the front of the front cover 20, respectively.
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 its rear surface, and a guide pin 10E, a claw 10F, and a locking portion 10G on the front of the camera body 10, respectively. 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 P15 and the spool S2 with the leading end of the unexposed film F are respectively loaded in a cartridge chamber 15A and a scroll chamber (film winding chamber) 15B formed on the back surface.

The other end of the film F is locked on a spool S1 in the patrone P1, and even if the film in the patrone is once wound up by the 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 light shielding of the film F and the restriction on the focus surface position are maintained.

The back cover 30 has claws 30A and 30B on its front surface and locking holes 30C and 30D on its side surface.
The claw 30A and 30B are the locking parts of the camera body 10
Holes 30C and 30D on the other hand are 10H and 10J,
K and 10L are engaged and fixed.

After mounting the back cover 30, a predetermined film winding operation is performed to set a photographable screen, and the screen is completed by mounting the carton shown in FIG.

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

FIGS. 3 and 4 show the above-mentioned respective mechanisms at angles viewed from the rear side of the camera.

The camera body 10 has two cartridge 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 a J135 film F wound around a patrone P as a storage container shown in FIG. 4 is loaded.

The film F coated with the photosensitive material used in the camera of this embodiment may be a roll film J135 or a slightly thin 110-140 μm roll film as in a general camera. Then, the end is fixed to the spool S1 of the patrone P1, 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 patrone P1. The film in this state is loaded into the camera. The loading method will be described below.

The patrone P1 is placed in the patrone chamber 15A.
The cartridge S1 is loaded so that the spool S1 of the cartridge P1 is engaged with the fork of the hoisting fork 52. On the other hand, the spool S2 is also inserted into the scroll chamber 15B. The leading end of the film notch catcher FN of the film F, pull the film F until fits the bottom of the indicator 17A of the lower rail surface, the film F
Hooking perforations P of the film F to the pawl H by inserting the tip into the slit SL of the spool S2 Keru.

Next, the back cover 30 is put on the back cover 30 to make it light-tight. The camera in this state is attached to a film winding device, and the spool is driven by driving the film winding device.
Rotate S2 to rotate the entire film F (the other end is a patrol
The film is finished to be loaded by winding the film ( within the range not detaching from the spool S1 of the screw P1) on the spool S2 of the scroll chamber 15B. That is, the film F
Is loaded, the film F is sequentially wound into the patrone P1 for each photographing. When two sheets are fed after the predetermined number of photographings are completed, the leading end of the film F is wrapped in the patrone. The photographed film is rolled into the patrone P1 without leaving the necessary length without being removed. 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, a cam stopper after photographing is completed
The protrusion 62D of the cam 62 is removed from the groove 55A of the cam 55, and the arm 57A of the hoisting stopper 57 changes from the state shown in the drawing to change the arm 61A of the charge lever 61 and the cam stopper 62.
Of the arm portion 62A and comes into contact with the end surface of the arm portion 61A by the spring force of the hoisting stopper spring 58 biased 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 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.

When the release button 25 of the front cover 20 is pressed, 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 causes the kettle 61C of the charge lever 61 to
The rising portion 65B of the sector lever 65 is hit and comes off from 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 returns to the original position due to the tensile force of the sector spring 67. Therefore, the sector drive pin 65A rotates the sector 66 about the sector pin 18D to expose the film and close 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, and the film is wound up by one frame so that the cam shaft Reference numeral 56 denotes an index gear that rotates clockwise by one tooth for each rotation.

An index plate 71 is printed on the upper surface of the index plate gear 72 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, and when the next film winding after the photographing of a predetermined number of frames is completed, 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.

When two frames of film are wound up in this way, the index wheel 72 rotates by two teeth.
By this rotation, the projection 72A of the index plate gear 72 still holds the projection 61E to prevent the movement of the charge lever 61, but comes off the projection 62E of the cam stopper 62. Therefore, the protrusion 62D is formed in the groove 55A of the cam 55.
And the locking of the hoisting stopper 57 is released and the hoisting stopper
The winding knob 51 is locked by 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 leading end of the film is prevented from being caught in the cartridge.

FIGS. 5A and 5B show the form of the pawl H of the spool S2 according to the first aspect of the present invention, and FIG.
This is shown by a cross section.

The spool S2A shown in FIG. 5A is an example in which a pair of claws H for engaging the perforations P of the film F are projected at symmetrical positions on the peripheral surface of the shaft portion. The engagement of the holations P is extremely easy and reliable.

Each of the spools S2B and S2C shown in FIGS. 5 (b) and 5 (c) is an example in which the pawl H is buried in the peripheral surface of the shaft portion. However, there is a feature that the film F can be wound around the shaft in a completely tightly wound state.

The spools S2A, S2B and S
2C, after the winding of the unexposed film F was completed ,
Rotation in the direction opposite to the film winding direction on each spool
When each of the claws H is rotated reversely by a predetermined angle, that is, clockwise in FIG.
The film F, which has been wound off and wound, can be released from each spool in a so-called "bull-wound" state.

Therefore, at the time of film feeding during photographing,
The load for rotating the spool S2 is eliminated, and the operation of the hoisting knob 51 described above becomes lighter and easier.

FIG. 6 shows a schematic configuration of the spool S2 according to a second aspect of the present invention by a longitudinal sectional view and a BB sectional view thereof.

The spool S2 is composed of a cylindrical outer cylinder I having a shaft portion and a flange portion integrated with each other, and a rotatable, similarly cylindrical inner cylinder II fitted inside the outer cylinder I. I have.

A gap C is provided between the inner circumference of the outer cylinder I and the outer circumference of the inner cylinder II, and the slit SL1 of the outer cylinder I and the slit SL2 of the inner cylinder II match over the gap C. You can do it. Although the gap C is shown in an enlarged manner in the drawing for the sake of simplicity, the gap C is actually configured so as to be held by the film thickness and the material.

When the leading end of the film F is inserted with the slit SL2 aligned with the slit SL1 and the inner cylinder II is rotated counterclockwise in the figure, the resistance caused when the film F is pulled out from the cartridge P1 is increased. As shown in FIG. 6 (b), since the front end of the film F is bent and locked to the shaft, the film F is wound around the outer tube I by continuing rotation of the inner tube II. You can do it.

When the winding operation of the inner tube II is stopped after the winding of the film F is completed and the film F is brought into a free state, the inner end of the bent film F is restored elastically as shown in FIG. Tube II has slit SL2 and outer tube I has slit SL
It is reversed clockwise until the angle matches 1.

Accordingly, the wound film F is in a so-called "bull-wound" state, the leading end of the film F comes out of the slit, and is free, and the load of film feeding is reduced.

FIG. 7 shows the structure of the spool S2 according to a third aspect of the present invention.

The spool S2 is a male screw spiral having no flange, and right-hand thread portions t1 and t2 are continuously formed on the outer periphery thereof.

The thread portions t1 and t2 are formed of the same one and two threads of the lead, respectively, as shown in FIG.
As shown in (1), the end of the screw portion t1 previously housed in the scroll chamber 15B is provided on the camera body 10, and is screwed into a spiral hole of a female screw.

The above-mentioned helical hole is provided in the thread portion t of the spool S2.
1 and a screw portion T1 formed of a single thread and screwed with the screw portion t2, and a screw portion T2 formed of two threads that can pass through the screw portion t1.

When the leading end of the film F is inserted into the slit SL in the state shown in FIG. 7A and the spool S2 is rotated counterclockwise as viewed from the direction C, the spool S2 is moved from the scroll chamber 15B to the camera body 10B. The film F is wound around the peripheral surface while moving and retracting outward.

The spool S2 continues to rotate until the screw portion t2 is screwed into the screw portion T2 of the above-mentioned helical hole and the propulsion is stopped by the screw portion T1. The winding is finished, and at the same time, the leading end portion of the film F is made to escape from the slit SL to be free, and the wound film F is set in a “bull-wound” state.

Accordingly, the film F in the scroll chamber 15B
Is easily fed by the film winding knob 51 without any rotational resistance of the spool S2. The unnecessary spool S2 that projects outside the camera body 10 is broken off at the position of the cut groove G provided in advance and discarded. As in this embodiment, when the winding is completed, the spool S
2 is largely removed by the manufacturer, so that after the product has been sold, the user can change the film on his own and the effect of preventing a poor quality camera from being released to the world is also obtained.

[0073]

According to the present invention, the rotational resistance of the spool in the scroll chamber at the time of film feeding is eliminated, and as a result, the winding load of the film is reduced and the operation is easy even for a beginner and the durability is improved. A film unit with a lens will be provided.

[Brief description of the drawings]

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

FIG. 2 is a developed perspective view showing a configuration of the unit.

FIG. 3 is an exploded perspective view showing a film winding mechanism and the like of the unit.

FIG. 4 is an explanatory view of a film loaded in the unit.

FIG. 5 is an external view and a sectional view of a spool according to the first embodiment.

FIG. 6 is a sectional view of a spool according to the second aspect.

FIG. 7 is an explanatory view of a spool according to claim 3;

[Explanation of symbols]

 10 Camera body 15A Patrone room 15B Scroll room 20 Front cover 30 Back cover P1 Patrone S2, S2A, S2B, S2C Spool H Claw SL. SL1, SL2 slit F film P perforation I outer cylinder II inner cylinder t1, t2 (male) thread T1, T2 (female) thread

Claims (1)

(57) [Claims] 1. A winding shaft of a film winding chamber from a patrone.
A film with a lens that winds an unexposed film in advance
In the method of loading a film of the winding unit,
By rotating in the winding direction, the unexposed film
The winding shaft is wound up to a winding state.
Is rotated in a direction opposite to the winding direction, so that the winding
The unexposed film in the state is released from the winding shaft and
Film with a lens characterized by being wound
The unit's film loading method.