JPH05204094A - Film unit provided with lens - Google Patents

Abstract

PURPOSE:To attach a film to be loaded in a film unit provided with a lens on a spool having a small shaft diameter and to wind the film around the spool without causing the fold and hard curling of the film. CONSTITUTION:Plural pawls H for engaging perforations P on the film F are formed on the shaft of the spool S2 which is loaded in the film unit provided with the lens so that the pawls may be matched with the perforations on the circumferential surface of the shaft of the spool S2, furthermore, by forming a slit hole SL for inserting the leading end of the film F on the shaft part, or by forming a press member J for preventing the leading end of the film F from floating up, the film F is surely locked and wound, and simultaneously, the occurrence of the fold and the hard curling of the film F is prevented.

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, which has an exposure function and a film winding function and can immediately take a photograph of an unexposed film loaded in advance.

[0002]

2. Description of the Related Art A film unit with a lens is a so-called film-integrated camera having a function of taking a picture, which is also called a "shooting-only camera". Since it is used only for film shooting and the camera body is discarded after taking out the exposed film, it is manufactured at a low cost with a simple structure.

In addition, although cameras are often purchased and used on the go while traveling, it is hard to say that they are convenient to carry, and they are equipped with a taking lens of f = 35 mm and have an outer shape of 110 mm × 60 m.
It was about mx 35 mm, and I couldn't get it into the chest of my shirt, which was inconvenient.

[0004]

However, even though it is called a "shooting-only camera", the camera function is advanced as in the case of a lens-equipped film unit with a built-in stroboscopic light emitting device due to the recent diversification of shooting purposes. There is a tendency for that reason, and the increase in cost and the increase in camera size are inevitable.

As a result of solving these problems and improving the present invention, it is an object of the present invention to provide a small-sized film unit with a lens by simplifying the camera mechanism and utilizing space.

At that time, if the diameter of the spool shaft in the cartridge or the diameter of the winding shaft provided in the film winding chamber becomes small for the downsizing of the camera, the film tends to be curled, and the film is handled during development. Since it is difficult to cause problems, we have improved the take-up shaft to solve this problem and aim to provide a film unit with lens that has less curl and does not damage the photosensitive material. I am trying.

[0007]

[Means for Solving the Problems] The above object is to use a film cartridge with a diameter smaller than that of a standard film cartridge (JISK7528), and to wind the film from the film cartridge into a film winding chamber in advance. A film with lens, characterized in that a slit shaft for inserting a film and a locking pawl for perforation engagement matching the outer peripheral surface of the shaft portion are formed in a winding shaft portion for winding a film in a take-up chamber. A unit and a film cartridge with a diameter smaller than that of a standard cartridge (JIS K7528), in which the film is wound in advance from the cartridge to the film winding chamber, in the film winding chamber, a winding shaft for winding the film in the film winding chamber. The film holding member for preventing the film from rising and the engaging member for the perforation engaging with the outer peripheral surface of the shaft portion. This is achieved by a film unit with a lens, which is characterized in that a pawl is formed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an external view of a film unit with a lens (hereinafter also referred to as the present camera) of the present invention, that is, a film-integrated camera, which is sold with a 35 mm film (J135) preloaded. After filming, the film is sent to the maker without removing it from the camera, and the film is developed and printed.

The unexposed film used in this camera is loaded in a cartridge, and after the camera is kept in a light-tight state, the winding shaft on the film winding chamber side is driven to drive the film inside the cartridge. Wind all the film into the film winding room.
The user winds the film every time the photograph is taken, so that the photographed film is wound in the patrone.
Therefore, on the maker side, the film that has already been taken can be taken out from the camera as a patrone in a bright room.

Further, it is possible to easily take out the photographed film by bending a part of the back cover. Therefore, if the back cover is exchanged, a new unexposed film is loaded and used as a reuse camera. You can also do it.

As a cartridge loaded in the camera, a cartridge having an outer diameter of φ20.6 mm, which is different from a cartridge (JISK7528) which is generally used, is used.

As a result, the thickness of the camera can be suppressed to about 24 mm except for the lens barrel portion having the taking lens, and an ultra-thin compact camera is realized.

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 development view showing the structure of the camera.

Reference numerals 10, 20 and 30 denote a camera body, a front cover and a back lid, which are the main components of the camera, and 40 denotes a built-in strobe unit and 50 and 60.
Reference numerals 70 and 70 are film winding, sector charge and film counter mechanisms, respectively.

When the camera body 10 is used alone, each member constituting the film winding mechanism 50, the sector charge mechanism 60, and the film counter mechanism 70 is mounted, and the shutter case 11 for housing the sector is mounted.

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

Further, on the front surface of the shutter case 11, there is provided a slit 13A which is a single lens having a focal length f = 30 mm and a photographing lens 12 having an aperture of F9.5 and which is engaged with the guide pin 11B. Covered by lens presser 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 substrate which engage with the guide pins 10B and 10C on the front surface of the camera body 10, respectively.

The upper and lower battery sections 41, which are integrated with the strobe unit 40, are inserted into the upper and lower slit holes 10D of the camera body 10 and projected into the battery chamber on the back side of the camera body 10 to form an AA battery E as a strobe charging power source. To pinch.

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

The lens retainer 13 and the strobe unit 40 described above
The fixing and integration of the above with the camera body 10 is completed by mounting the front cover 20 on the camera body 10.

Prior to mounting the front cover 20 on the camera body 10, an objective lens 21 of a finder is dropped in front of the front cover 20 and is fixed by engaging a decorative cover 22. The makeup cover 22 has a guide pin 22A and four nails 22B on the back.
The front cover 20 and the holes 20A and 4 on the front of the front cover 20, respectively.
It is attached by engaging with the locking portion 20B at the location.

The front cover 20 is mounted on the front surface of the camera body 10 after the eyepiece lens 23 of the finder is engaged and mounted on the rear surface.

The front cover 20 is provided with a hole 20C, a claw 20D, and three engaging portions 20E on the back surface, and the front cover 20 has a guide pin 10E, a nail 10F and a side engaging portion 10G on the front of the camera body 10. It is fitted and attached.

By engaging and mounting the front cover 20 on the camera body 10, the lens retainer 13 and the strobe unit 40 are fixed to the camera body 10.

The camera body 10 with the front cover 20 attached
In the cartridge chamber 15A and the scroll chamber (film winding chamber) 15B formed on the back surface of the cartridge, the cartridge P1 and the spool S2 in which the leading ends of the unexposed film F are locked are loaded, respectively.

The other end of the film F is locked to the spool S1 in the cartridge P1. Even if the film in the cartridge is wound up by the spool S2 after the film is loaded, the other end is locked to the spool S1. Therefore, it can be rolled up in the Patrone P1 every time the shooting is completed.

A back cover 30 is attached to the back surface of the camera body 10 in which the film F is loaded so that the film F is protected from light and the focus surface position is restricted.

The back cover 30 is provided with claws 30A and 30B on the front surface thereof and locking holes 30C and 30D on the side surfaces thereof.
Claws 30A and 30B are engaged with the camera body 10 when mounted on the camera.
On the 10H and 10J, the one holes 30C and 30D are the nails 10 of the camera body 10.
It is fixed by engaging K and 10L.

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 process.

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

FIGS. 3 and 4 show the above-mentioned respective mechanical parts at an angle when viewed from the rear side of the camera.

The camera body 10 has a cartridge chamber 15 as two accommodating chambers for film winding and film loading in the same plane on both sides of the screen frame 16 which is the exposure unit.
A and a scroll chamber 15B are provided so that a J135 film F wound in a cartridge P which is a storage container shown in FIG. 4 can be loaded.

The film F used in this camera of this embodiment is a roll film J135 or a slightly thin roll film having a thickness of 130 to 140 μm, which is used as a general camera. The end portion is fixed to S1 and the film is wound up for a predetermined number of frames so that the film can be photographed, and a film of a certain length has come out from the film outlet of the cartridge P1. The film in this state will be loaded into the camera. The loading method will be described below.

The cartridge P1 is loaded in the cartridge chamber 15A so that the spool S1 of the cartridge P1 is engaged with the fork 52 of the hoisting fork 52. On the other hand, the spool S2 is also inserted in the scroll chamber 15B. Then, the tip of the film notcher FN of the film F is located at the lower portion of the lower rail surface, which is an index 17.
The film F is pulled out until it fits A, the tip of the film F is inserted into the slit SL of the spool S2, and the perforation P of the film F is hooked on the nail H.

Next, the back cover 30 is covered and the cover is made light-tight.
Then, this camera in this state is attached to the film winding device, and the entire film F (with the other end not separated from the spool S1 of the cartridge P1) is moved to the scroll chamber 15B.
The film is loaded by winding the film on the spool S2. That is, by loading the film F in this way, the film F is sequentially wound into the patrone P1 for each shooting, and when two films are fed in advance after the shooting of a predetermined number of films is completed, The photographed film is wound into the cartridge P1 while leaving the required length without the leading end being wound into the cartridge. Therefore, this cartridge can be taken out from this 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 charge mechanism 60,
The main mechanism of the film counter mechanism 70 is incorporated therein.

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

Reference numeral 51 denotes a film winding knob, and the film F loaded as described above is wound up by rotating the film winding knob 51 counterclockwise. A cam 55 coaxial with an eight-toothed sprocket gear 54 meshing with the perforation P of the film F and having a fan-shaped cam portion 55B at the bottom.
Is designed to rotate exactly once counterclockwise by winding the film.

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

By the counterclockwise rotation of the cam 55, the fan-shaped cam portion 55B naturally rotates counterclockwise as described above, and in the process, the fan-shaped cam portion 55B moves the charge lever 61 and the charge lever shaft 63. Is rotated clockwise against the spring force of the charge lever spring 64 that urges the charge lever 61 in the counterclockwise direction, and the triangular ketobashi 61C provided on the charge lever 61 causes the rising portion 65B of the sector lever 65 to rise.
Is pressed, and the rising portion 65B is eventually overcome to charge the sector charge 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 at the sector lever 67, and the tensile force of the sector spring 67 causes the sector lever 65 to move.
The left end of the elongated hole is brought into contact with a pin 18B provided on the camera body 10 that guides the elongated hole of the camera in a slidable and rotatable manner, and the sector lever
Pin 18 provided on camera body 10 with arm plate 65D provided on 65
It comes in contact with E. Further, a sector drive pin 65A for actuating the sector 66 pivotally supported by the sector pin 18D provided on the camera body 10 is inserted in the forked portion of the sector 66.

As will be described later, the cam stopper after shooting is completed.
The projecting portion 62D of 62 is removed from the groove portion 55A of the cam 55,
The arm portion 57A of the hoisting stopper 57 changes from the state shown in the drawing to change the arm portion 61A of the charge lever 61 and the arm portion of the cam stopper 62.
The arm 62A is in contact with the end surface of the arm portion 61A by the spring force of the hoisting stopper spring 58 which is displaced from each edge of the arm 62A and urges clockwise. When the cam 55 rotates exactly once as described above by the film winding and the groove 55A of the cam 55 returns to the initial position, the spring force that biases the cam stopper 62 in the clockwise direction by the horizontal end portion of the charge lever spring 64. As a result, the protrusion 62D of the cam stopper 62 jumps into the groove 55A. By this jumping operation, the lock of the arm portion 57A of the hoisting stopper 57, which was locked at 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, and the ratchet force of the winding stopper spring 58 causes the ratchet to rotate. It jumps into the tooth groove of the gear 51A and prevents 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 further winding rotation.

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

By pressing the release button 25 of the front cover 20, the release button pin 25A is planted on the back surface of the release button 25.
Operates in the direction of arrow A. That is, the front cover 20
When attached to the camera body 10, the winding knob
51 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, from the end surface of the arm portion 57A of the hoisting stopper 57, the arm portion of the charge lever 61
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.

By rotating the charge lever 61 counterclockwise, the ketobashi 61C of the charge lever 61 is
The sector lever 65 is tapped on the rising portion 65B and then separated 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 then returns to the original state by the tensile force of the sector spring 67. Therefore, the sector drive pin 65A rotates the sector 66 around the sector pin 18D to expose the film and then closes it.

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

Next, the film counter mechanism will be described.

As described above, 72 meshes with the V groove 56A provided at the upper end of the cam shaft 56 planted in the cam 55 which rotates integrally with the sprocket gear 54, and one frame of film is wound up to form a cam shaft. It is an exponential gear that rotates clockwise one tooth each time 56 rotates once.

An index plate 71 is printed on the upper surface of the index wheel gear 72 as an integrally molded product, and the number of remaining photographable films is displayed through the film counter window 26 on the upper surface of the front cover 20.

A projecting portion 72A is provided on the lower surface of the exponential gear 72, and the projecting portion 72A is projected by the next film winding after the photographing of a predetermined number of frames is completed.
It is designed to be inserted between the E and another protruding portion 62E of the cam stopper 62 so as to enter. Then, the projecting portion 72A is replaced by the two projecting portions 61.
By entering between E and 62E, the film is wound up by one frame, and even if the cam 55 makes one rotation and the charging of the sector is completed, both the projecting portions 61E and 62E become the projecting portion 72A of the exponential gear 72. As the movement is blocked, the charge lever 61 cannot operate and the protruding portion 62D of the cam stopper 62 is also in the groove portion of the cam 55.
You will not be able to jump into 55A. The arm portion 57A of the hoisting stopper 57 contacts 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 projection at the tip of the hoisting stopper 57 locks the ratchet gear 51A. It is also not possible to operate the charge lever 61 to open or close the sector to expose the film.

In this way, when two frames of film are unwound, the index plate gear 72 rotates by two teeth, and this rotation causes the protruding portion 72A of the index plate gear 72 to move beyond the protruding portion 61E. The charge lever 61 is pressed to prevent the charge lever 61 from moving, but is separated from the protruding portion 62E of the cam stopper 62. Therefore, the protruding portion 62D is a groove portion of the cam 55.
The film jumps to 55A, and the winding stopper 57 is disengaged, so that the winding knob 51 is locked by the winding stopper 57 and the film cannot be wound. And as mentioned above, the charge lever
Since the movement of 61 is blocked, the film cannot be exposed. In this way, the leading edge of the film is prevented from being caught in the cartridge.

FIGS. 5 (a) and 6 (a) show details of the spools S2A and S2B of different embodiments, and FIGS. 5 (b) and 6 (b) show respective cross sections A. As shown in FIG.
It is an enlarged view of A and the cross section BB.

The spool S2A shown in FIG. 5 is provided with a slit hole SL penetrating the shaft portion having a circular cross section, and the peripheral surface of the shaft portion facing one end thereof is locally planarized. Thus, two sets of locking claws H facing each other corresponding to the perforation position of the film are formed by molding.

The film F attached to the spool S2A has its tip end inserted into the slit hole SL, and then the perforations P on both sides are engaged with the pawls H to apply a slight tension to the shaft. Is wound around the club.

The film is bent only at the leading end and is wound concentrically from the second lap in contact with the upper surface of the claw H. As a result, no crease or strong curling is generated, and the shaft of the spool S2A is therefore prevented. The diameter D can be reduced to about 9 mm.

On the other hand, the spool S2B shown in FIG. 6 has a pair of locking claws H corresponding to the perforation position of the film by locally flattening the peripheral surface of the shaft having a circular cross section. A pressing member J that prevents the locked film from rising is formed by molding.

The film F attached to the spool S2B has its tip end inserted into the lower side of the pressing member J, and then the perforations P on both sides are engaged with the pawls H to apply a slight tension. Is wound around the shaft.

Therefore, the film F is kept in a state of being engaged with the claw H by the pressing member J without the tip of the film floating, and from the second round, the film F is concentrically wound in contact with the upper surface of the claw H. Similar to the example, even if the shaft diameter D of the spool S2B is thinned to about 9 mm, there is no possibility of causing a fold or strong curling.

Even if the shaft diameter D of the spools S2A and S2B is about 10 to 11 mm, the shape as in the present application is useful. The larger the shaft diameter of the spools S2A and S2B is, the harder it is to wind them, but the larger. If the diameter is increased, it is necessary to enlarge the scroll chamber (film winding chamber). In the present invention, the thickness of the camera is reduced by making the shaft diameter small.
It has become possible to wind a film of 24 or more frames with a length of 23 to 25 mm, for example, 24 mm. The spool S
In both 2A and S2B, an appropriate lightening portion is provided on the shaft portion during molding.

Further, the axial sectional shape of the spool is as circular as possible, and it is necessary to wind the film immediately after the tip is locked to the shaft so as not to come out of the circle as much as possible. Especially, in the spool S2B, after the locking. The shape of the film does not rise. FIG. 7 shows a spool S of another embodiment.
2C shows a cross-sectional shape of the shaft sandwiched between the upper and lower flange portions, and the portion indicated by S21C is the axially penetrating shaft portion,
The portion indicated by S22C is a plurality of rib portions provided at appropriate intervals in the vertical direction, and the film is wound in a nearly circular shape by inserting and winding the leading end of the film into the slit hole SL. The spool S2C shown in FIG. 7 can be easily formed by forming left and right split molds in the drawing.

[0066]

According to the present invention, it is possible to load and feed a film even in a scroll chamber having a small inner diameter without causing creases or strong curling. As a result, the film is made compact and easy to handle and carry. Also, a convenient film unit with a lens will be provided.

[Brief description of drawings]

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

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

FIG. 3 is a developed perspective view showing a film winding mechanism of the unit.

FIG. 4 is a perspective view of a film cartridge loaded in the unit.

FIG. 5 is an explanatory diagram of a film winding spool used in the unit.

FIG. 6 is an explanatory diagram of a film winding spool used in the unit.

FIG. 7 is a sectional view of a spool shaft according to another embodiment.

[Explanation of symbols]

 10 Camera body 11 Shutter case 12 Shooting lens 20 Front cover 21 (Finder) Objective lens 22 Decorative cover 30 Back cover 40 Strobe unit 50 Film winding mechanism D (Spool) Shaft diameter F Film H Claw J Presser member P Perforation S1, S2, S2A, S2B, S2C spool

Claims (2)

[Claims] 1. A lens-equipped film unit in which a film cartridge having a diameter smaller than that of a standard cartridge (JISK7528) is used, and the film is wound in advance from the cartridge to the film winding chamber. A film unit with a lens, characterized in that a slit hole for inserting a film and a locking pawl for perforation engagement matching the outer peripheral surface of the shaft portion are formed in the shaft portion. 2. A film unit with a lens, wherein a film cartridge having a diameter smaller than that of a standard film cartridge (JISK7528) is used, and the film is previously wound in the film film winding chamber from the film cartridge. A lens-equipped film unit, wherein a pressing member for preventing film floating and a locking claw for perforation engagement are formed on the shaft portion so as to match the outer peripheral surface of the shaft portion.