JPH05210153A - Film unit with lens - Google Patents

Abstract

PURPOSE:To provide a film unit with a lens whose cost is restrained from rising by simplifying the mechanism of a camera or making use of space, which has high reliability on a film counter mechanism by which reuse can be possible and where shutter charging actions are accurately performed. CONSTITUTION:A sprocket gear 54 is fixed on a cam member 155 fitted in a camera main body 10 through a hole, and the V-shaped groove of the gear at the tip of a cam shaft 56 meshes with the gear of an index board, so that the index board 71 is moved by one frame with the movement of film and a fan-shaped cam part 55B moves a charging lever 61 to perform shutter charging. A projecting part 62D is fitted in a circumferential groove part 72E provided on the index board 71, and an arm 10P provided in the camera main body 10 presses the cam member 155 to the lever 61, whereby actuation is stabilized.

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 fit it in the chest pocket 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.

Further, from the idea of reusing resources, it has been demanded that the "shooting-only camera" be a reusable camera, that is, a Lew's camera.

Therefore, in order to satisfy such demands, the mechanism as a camera must have a structure that is as simple as possible, inexpensive and highly reliable. And in a camera like this unit, the film counter mechanism that displays the only numerical value needs to change the display every time one frame is taken and wound.
The label must not be inaccurate. In addition, the shutter charge must be done correctly and the shooting operation must be done correctly. Therefore, there is a demand for a film counter mechanism that is simpler and does not deteriorate in reliability even if it is used as a Lew's camera a number of times, and that the shooting operation is accurately performed without causing any failure.

As a result of solving these problems and improving the present invention, as a result of the simplification of the mechanism of the camera and the utilization of space, the cost increase is suppressed and the film counter mechanism which enables reuse and the reliability of the photographing operation. It is intended to provide a film unit with a lens having high performance.

[0008]

SUMMARY OF THE INVENTION The above-mentioned object is that a film is built-in in advance and photography can be performed immediately, and a sprocket is rotated by a predetermined amount and a counter is rotated by a predetermined angle by a hoisting operation of a winding knob. In the film unit with a lens that is sequentially wound in the cartridge, the film having the sprocket on the shaft, the gear having the feeding function of the counter, and the charging cam of the charge lever are provided. The cam member that is hole-fitted to the main body,
A lens-equipped film unit having a cam member configured to be pressed toward the charge lever by an elastic member provided in the main body, and a film built in in advance to enable immediate photographing, and a winding knob. The sprocket is rotated by a predetermined amount and the counter is rotated by a predetermined angle by the winding operation of the film, and the film after shooting is sequentially wound into the cartridge, the lens-equipped film unit has the sprocket on the shaft, A cam member having a gear having a counter feeding function and a charge cam of a charge lever, which is hole-fitted in the main body, is configured to be pressed toward the charge lever by an elastic member provided in the main body. This is achieved by a film unit with a lens, which has a cam member.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an external view of a lens-equipped film unit of the present invention (hereinafter also referred to as the present camera), which is provided with a 35 mm film (J135) pre-loaded in the present camera, and after completion of photographing. The film is sent to the manufacturer without removing it from the camera, and the film is developed and printed.

The unexposed film used in this camera is loaded in a state of being wound on a spool, and is wound into the cartridge by winding it up every time photographing is performed.
Therefore, on the maker side, the film already taken can be taken out from the camera in the bright room.

The taken film can be easily taken out by bending a part of the back cover. Therefore, if the camera part is checked and a new unexposed film is loaded and the back cover is replaced, the film can be re-read. Can be used.

The cartridge loaded in the camera is different from a commonly used cartridge (JISK7528), but a cartridge having an outer diameter of φ20.6 mm 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 carton (paper cover) made of cardboard 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 present camera.

Reference numerals 10, 20 and 30 denote a camera body, a front cover and a back lid, which are main components of the camera, respectively, and 40 denotes a built-in strobe unit, and 50,
Reference numerals 60 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, a photographing lens 12 having a focal length of f = 30 mm and a diaphragm of F9.5 is dropped, and a slit 13A for engaging with a guide pin 11B is provided. Covered by lens presser 13.

The camera body 10 and the shutter case 11 described above
Are 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 with reference to 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.

In the strobe unit 40, the upper and lower battery contact pieces 41 integrated with each other are inserted into the upper and lower slit holes 10D of the camera body 10 and projected into the battery chamber on the rear surface of the camera body 10 to form an AA battery as a strobe charging power source. Hold a certain power supply battery E.

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

The above-mentioned lens retainer 13 and strobe unit 40
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.
Are provided so as to be engaged with the holes 20A on the front surface of the front cover 20 and the locking portions 20B at four positions, and are attached.

The front cover 20 is further 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 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 and the scroll chamber (both not shown) formed on the back surface of the cartridge, the cartridge P1 and the spool S2 with the leading end of the unexposed film F locked are respectively loaded.

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 for completion.

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

FIG. 3 shows each of the above-mentioned mechanisms at an angle when viewed from the rear side of the camera, and FIG. 4 shows at an angle when viewed from the side of inserting the film-wrapped cartridge and spool into the camera body. It is a thing.

In the camera body 10, a cartridge chamber 15 is provided as two storage chambers for film winding and film loading in the same plane on both sides of the screen frame 16 which is an exposure unit.
A and a scroll chamber 15B are provided, and J135 caught in the cartridge P1 which is the storage container shown in FIG.
The film F is 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 a spool of the patrone P1 in a dark room or the like in advance as a container for accommodating the roll film J135 and a slightly thin roll film. 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, in this embodiment, the film F is pulled out until the tip of the film notcher FN of the film F is aligned with the index 17A on the lower portion of the lower rail surface.
The tip of the film F is inserted into the slit SL of the spool S2 to lock the perforation P of the film F to the claw H. The film notcher FN is such that the emulsion lot number of the film is indicated by several holes provided in the tongue portion at the tip of the film.

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 photographing, and after the photographing of a predetermined number of frames is completed, in the present embodiment, the two frames are fed in a blank. And film F
The leading end of the film is taken up in the patrone P1 while leaving the necessary length without being taken up in the patrone. Therefore, this cartridge can be taken out from this camera in a bright room.

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

The camera body 10 includes 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 is 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 causes the charge lever to rotate.
61 is rotated clockwise against the spring force of the charge lever spring 64 that biases the charge lever shaft 63 in the counterclockwise direction about the rotation axis, and the triangular ketobashi 61C provided on the charge lever 61 causes the sector to rotate. The rising portion 65B of the lever 65 is pressed, and then the rising portion 65B is 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 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 due to the disengagement of the lock is the ratchet by the spring force of the winding stopper spring 58. 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 rotating.

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, a 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 portion of 61A is disengaged, and the charge lever 61, and hence 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 caused by the spring force of the charge lever spring 64, which is stronger than the sector spring 67, causes the ketobashi 61 of the charge lever 61 to rotate.
C hits the rising portion 65B of the sector lever 65 and then 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 the sector spring 67
It returns to its original state due to the pulling force of. Therefore, sector drive pin 65A
Will rotate sector 66 about sector pin 18D to provide film exposure and then close.

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 clockwise by the spring force of the hoisting stopper spring 58, but the arm portion 61A of the charge lever 61 is
It is stopped by the end face of A and stops, and the V-shaped projection at the tip of the hoisting stopper 57 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, 72 meshes with the V groove 56A of the gear provided at the upper end of the cam shaft 56 planted in the cam 55 which rotates integrally with the sprocket gear 54, and the film 1
It is an exponential gear that rotates clockwise by one tooth for each rotation of the cam shaft 56 when the frame is wound up.

An index board 71 is printed on the upper surface of the index board 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.

FIG. 5A is a perspective view of the cam member 155, which has the cam shaft 56, the cam 55, and the fan-shaped cam portion 55B, whose mechanism has been previously described, and is fitted coaxially. 55C of mating shaft,
In addition, the tip has a sprocket mounting part with a two-sided cross section.
It is a resin-molded member having 55D. Cam member 155
Is inserted into the camera body 10 and fitted with the fitting shaft 55C, and the sprocket gear 54 is attached to the sprocket mounting portion 55D at the tip.
Is fixed.

FIG. 5B is a plan view of the exponent gear 72 and the periphery of the cam member 155 of the film counter mechanism as seen from the upper surface side, and FIG. 5C is a side view thereof. Figure 5
In (b), the triangular teeth 72C of the index plate gear 72 below the index plate 71 are shown as the V-groove 56A of the gear at the tip of the cam shaft 56 which is coaxial with the sprocket gear 54 fixed to one end of the cam member 155. Are engaged. The sprocket gear 54
The film F meshing with the sprocket gear 54 moves counterclockwise during winding, and as described above, the V groove of the gear at the tip of the cam shaft 56 coaxial with the sprocket gear 54.
The index plate gear 72 meshing with 56A, and therefore the index plate 71
Will rotate clockwise. The cam 55 provided on the cam member 155 is rotated from the initial position by the rotation of the coaxially mounted sprocket gear 54 as the film moves.
When rotated, the protrusion portion 62D of the cam stopper 62 jumps into the groove portion 55A of the cam 55. Also, the cam member 15
The fan-shaped cam portion 55B provided on the member 5 pushes up the charge lever 61 during the counterclockwise rotation. Such operation is as already described.

The cam member 155, which performs a multi-functional operation, fits into the camera body 10 by the fitting shaft 55C and rotates, but the fitting length is not sufficient and it is difficult to expect good fitting accuracy. When the cam member 155 tilts during rotation, the index board 71 does not rotate correctly for each frame and the display becomes inaccurate. Further, while the fan-shaped cam portion 55B pushes up the charge lever 61, the reaction force causes the cam member 155 to move. When tilted, an accident occurs in which the push-up is insufficient and the shutter charge is not performed.

The present invention prevents the cam member 155 from tilting,
The cam shaft 56 is provided with a conical projection 56B at the tip thereof, and the lower surface of the index board 71 is provided with a circumferential groove 72E around the center of rotation of the index board 71. Is provided, and the protrusion 56B is always fitted in the groove 72E. In the example, the camshaft
Although the conical projection 56B is provided at the tip of 56, it is desirable that the tip of the cam shaft 56 be hemispherical or flat and have a shape that matches the cross-sectional shape of the circumferential groove 72E. Further, the camera body is provided with an arm 10P which operates as an elastic spring plate, and abuts the cam member 155 so as to press it from the side opposite to the abutment position of the charge lever 61, and abuts on the charge lever 61. The amount is constant.

With the above structure, the cam member 155 is regulated, and the cam member 155 causes a miso-slipping motion during rotation to make the display of the index board 71 inaccurate, and the shutter charge is not performed. Such an accident was prevented, and the operation became stable.

Returning to FIG. 3, a projection 72A is provided on the lower surface of the index wheel 72, and the projection 72A is charged by the charge lever by the next film winding after the photographing of a predetermined number of frames is completed.
The protrusion 61E of 61 and the other protrusion 62E of the cam stopper 62 are split and inserted. And the protruding portion 72A
The film is wound up by one frame by entering between the protrusions 61E and 62E, and even if the cam 55 makes one rotation and the sector charge is completed, the protrusions 61E and 62E protrude from the exponential gear 72. The movement of the portion 72A prevents the charge lever 61 from operating, and the protruding portion 62D of the cam stopper 62 cannot jump into the groove portion 55A of the cam 55. And
The hoist stopper spring 58 is attached to the end face of the arm portion 62A of the cam stopper 62.
The arm portion 57A of the hoisting stopper 57 abuts due to the spring force described above, the V-shaped projection at the tip of the hoisting stopper 57 does not lock the ratchet gear 51A, and the charge lever 61 is operated to open and close the sector. It is also impossible to expose the film to light.

In this way, in the present embodiment, when the two frames of film are fed in an idle manner, the index plate gear 72 rotates by two teeth. This rotation causes the protrusion 72A of the index plate gear 72 to rotate.
Hold down the protruding portion 61E and press the charge lever 61
Of the cam stopper 62, but another protrusion 62E of the cam stopper 62
It is supposed to come off. Therefore, the projecting portion 62D jumps into the groove 55A of the cam 55, the hoisting stopper 57 is disengaged, and the hoisting knob 57 is engaged with the hoisting knob 51.
You will not be able to wind the film. Further, as described above, the movement of the charge lever 61 is blocked so that 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, even if a cartridge having a small outer diameter is used, there is no problem in pulling out the film from the cartridge at the time of development.

[0063]

As described above, according to the present invention, the reliability of the film counter mechanism and the shutter operation is improved by a very simple structure, and it is possible to use it as a Lew's camera a number of times. A film unit will be provided.

[Brief description of 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 the configuration of a film unit with a lens based on the present invention.

FIG. 3 is a perspective view of each mechanism such as a camera body and a front cover of the lens-equipped film unit according to the present invention as viewed from the back side.

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

FIG. 5 is a perspective view of a cam member made in accordance with the present invention (a) and an enlarged view of the cam member and an index board and its surroundings (b).
In (c), (b) is a view seen from the upper surface side, and (c) is a side view thereof.

[Explanation of symbols]

 10 Camera body 10P arm 54 Sprocket gear 55 Cam 55B Fan-shaped cam portion 55C Mating shaft portion 55D Sprocket mounting portion 56 Cam shaft 56A V groove 56B Protrusion 61 Charge lever 62 Cam stopper 62D Projection portion 71 Index plate 72 Index plate gear 72C Triangular tooth 72E Groove 155 Cam member F film

Claims (2)

[Claims] 1. A film is built-in in advance so that photography can be performed immediately, and a sprocket is rotated by a predetermined amount and a counter is rotated by a predetermined angle by a winding operation of a winding knob. In a film unit with lens adapted to be wound into a cam member, which has a sprocket on a shaft, has a gear having a feed function of the counter, and a charging cam for a charge lever, and which is hole-fitted into a main body. The lens-equipped film unit, wherein the upper end shaft portion of the cam member has a cam member configured to be fitted in a circumferential groove provided in the counter. 2. A film is built-in in advance so that the film can be taken immediately, and a sprocket is rotated by a predetermined amount by a hoisting operation of a hoisting knob, and a counter is rotated by a predetermined angle. In a film unit with lens adapted to be wound into a cam member, which has a sprocket on a shaft, has a gear having a feed function of the counter, and a charging cam for a charge lever, and which is hole-fitted into a main body. Is a film unit with a lens, which has a cam member configured to be pressed toward the charge lever by an elastic member provided in the main body.