JPH07114082A - Film unit with lens - Google Patents

Abstract

PURPOSE:To provide a film unit with a lens whose size is reduced as small as possible by making the thickness of a cover or the like covering the film unit with a lens as thin as possible in terms of strength, molding and light shielding. CONSTITUTION:In this film unit with a lens in which exposing and film feeding means are incorporated and film is previously loaded so that photographing can be immediately performed; the thickness of the cover or the like 20 covering the unit is set to 0.8-1.2mm, and a cover which is made of resin and whose necessary spot is reinforced by a rib 20R having thickness at least larger than that of its periphery is used as the cover or the like 20.

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 photographing, 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 such a camera is often purchased and used at a destination such as a trip, it is hard to say that it is convenient to carry, and it has a taking lens of f = 35 mm and an outer shape of 110 mm × It was about 60mm x 35mm, and I couldn't fit it in the chest pocket of my shirt, which was inconvenient.

Therefore, a film unit with a lens, which is a miniaturized image-taking camera, has been provided to the market thereafter.

[0005]

However, even though it has been downsized, its outer dimensions are about 108 mm × 59 mm × 24 mm and the thickness dimension is about 11 mm smaller, but it is further downsized and portable. Convenient things have come to be requested.

In order to miniaturize the camera, it is necessary to reduce the dimensions of the constituent parts of the camera so that it can be accommodated in a small size. As a part of this, the covers covering the camera are also miniaturized as much as possible. There was a need.

The present invention has been made to solve the above problems. In other words, a film unit with a lens is used that is as thin as possible in terms of strength, molding, and light shielding, so that the thickness of the covers that cover the film unit with a lens that is a camera is as thin as possible. It is intended to be provided.

[0008]

SUMMARY OF THE INVENTION The above object is to provide a film unit with a lens, which has a built-in exposure and film feeding unit and which is preliminarily loaded with a film and which enables immediate photographing, and covers which cover the unit. The thickness of
By the film unit with a lens, which is 0.8 mm to 1.2 mm, and the covers are made of resin,
The present invention is achieved by a lens-equipped film unit characterized by using a cover in which necessary portions are reinforced by ribs whose thickness is at least thicker than the surrounding thickness.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an external view of a lens-equipped film unit (hereinafter also referred to as the present camera) of the present invention. This camera is provided with a 35 mm film (J135) pre-loaded, and after the completion of shooting. Without rewinding, the film is stored in the camera and sent to a developing station for film development and printing.

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 rolls up the film that has already been photographed into the cartridge by winding it up each time the photograph is taken. Therefore, in the photo lab, the photographed film can be taken out from the camera in the bright room without changing the cartridge.

Further, the taken-out film can be taken out easily by bending a part of the back cover. Therefore, the camera cover is checked, a new unexposed film is newly loaded, and the back cover is put on the maker side. If replaced, it can be reused, that is, used as a reuse camera.

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

As a result, the total thickness of the camera can be suppressed to around 23 mm except for the lens barrel portion having the taking lens, and an ultra-thin compact camera is realized.

The present camera is provided with a cardboard carton on which a product name, a simple method of use, etc. 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 constituent members 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 the sector is linked to the sector charge mechanism 60.

Further, on the front surface of the shutter case 11, a photographing lens 12 having a focal length f = 30 mm and an aperture 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
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 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 surface.
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 each of them is used as a guide pin 10E, a nail 10F and a side engaging portion 10G on the front surface of the camera body 10. It is attached by engaging.

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 cartridge P1 every time the photographing 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 light shielding of the film F and the regulation of the focus surface position are maintained.

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.
When attaching to the camera, the nails 30A and 30B are the locking parts of the camera body 10.
On the 10H and 10J, the 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 and completed.

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

FIG. 3 is a perspective view of the above-mentioned respective mechanical parts as seen from the back side of the camera, and FIG. 4 is a perspective view as seen from the direction in which the cartridge and the spool in which the film is wound are inserted into the camera body.

In the camera body 10, a cartridge chamber 15 is provided as two accommodating 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.
A 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 using a patrone as a container. 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 having a certain length is taken 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 into the cartridge chamber 15A so that the spool S1 of the cartridge P1 engages 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 the present embodiment, the film F is pulled out until the tip of the film notch FN of the film F is aligned with the index 17A on 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 to form the film F. The perforation P is locked to the claw H. The film notch FN is designed to indicate the emulsion lot number of the film by means of 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, the main camera in this state is attached to a special tool which is a film winding device, and the entire film F (however, the other end does not separate from the spool S1 of the cartridge P1) is wound onto the spool S2 of the scroll chamber 15B and the film is wound. Will be loaded. That is, by loading the film F in this way, the film F is sequentially wound into the patrone P1 for each shooting, and after the shooting of a predetermined number of images is finished, in the present embodiment, two frames are fed in a blank. , The leading end of the film F is not wound in the cartridge, and the film having been photographed is wound in the cartridge P1 with a necessary length left. 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 has 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 causes the charge lever to rotate.
61 is rotated clockwise against the spring force of the charge lever spring 64 that urges 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.

Pin 65C of the sector lever 65 and the camera body 10
A sector spring 67 is stretched between the pins 18C provided in the sector lever 67, and the tensile force of the sector spring 67 causes the sector lever 65 to
The left end of the long hole is brought into contact with the pin 18B provided on the camera body 10 which guides the long hole of the slot slidably and rotatably, 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 operating 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 edge of the arm portion 61A is abutted against the end surface of the arm portion 61A by the spring force of the hoisting stopper spring 58 which is offset from each edge of the arm portion 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 spring force of the winding stopper spring 58 causes the ratchet to rotate. It jumps into the tooth space 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 the is attached to the camera body 10, the hoist knob
51 By the operation of the tip of the release button pin 25 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 61 of the charge lever 61
The edge of A 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, which is stronger than the sector spring 67, causes the charge lever 61 to move in the above-described direction.
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 expose the film and then close it.

On the other hand, the cam stopper 62 also rotates counterclockwise together with the charge lever 61 as described above,
The projecting portion 62D of 62 comes out of 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 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 that is planted in the cam 55 that 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.

The index plate 71 is printed on the upper surface of the index plate gear 72 as an integrally molded product, and the remaining number of filmable images 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 index plate gear 72, and the projecting portion 72A is projected by the projecting portion 61 of the charge lever 61 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. 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. The movement is blocked and the charge lever 61 cannot be operated, 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. Also, it is impossible to operate the charge lever 61 to open and close the sector to expose the film.

In this way, in the present embodiment, when two frames of film are fed in an idle manner, the index plate gear 72 rotates by two teeth, and this rotation causes the protrusion 72 of the index plate gear 72 to rotate.
A is the charge lever that holds down the protrusion 61E at all.
The movement of 61 is blocked, but another protrusion 62 of the cam stopper 62 is
It is designed to come off from E. Therefore, the protrusion 62D
Jumps into the groove 55A of the cam 55, the winding stopper 57 is disengaged and the winding knob 51 is locked by the winding stopper 57, and the film cannot be wound. 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 edge 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.

The covers covering the lens-fitted film unit, ie, the front cover and the back cover, had a thickness of 1.4 mm in the past, but the thinner the thickness, the smaller the camera is naturally made. You can do it.

However, if the wall thickness is made too thin, problems will occur in strength, molding, and light shielding.

That is, in terms of strength, if the thickness of the covers is too thin, the strength of the camera and the rigidity of the camera as a whole will naturally decrease.
Therefore, it is necessary to provide ribs at necessary places to prevent deterioration of strength and rigidity.

Further, such covers are usually manufactured by pouring resin melted at high temperature into a molding die under pressure, but if the wall thickness is made too thin, the flow of molten metal will deteriorate and perfect molding will be possible. There will be no wall thickness and a certain thickness or more is required.

Further, the covers cover the outside of the camera and play an important role in maintaining the light-shielding property of the camera. However, if the wall thickness is too thin, the light-shielding performance deteriorates. Thickness is necessary.

FIG. 5 is a diagram showing an embodiment of the present invention.

FIG. 5 is a view of a front cover which is one of the above-mentioned covers, (a) is a view of the left side of the front cover as seen from the inside, and (b) is a view taken along the line XX of (a). FIG.

In FIG. 5, the front cover 20 has t1 and t
It is a resin cover with a wall thickness of 2, t3, and a flash window
20S and a large number of solder escape holes 20H (not shown) of the strobe board are provided, and ribs 20R having a thickness t4 are provided at these locations.

As a result of various studies on the wall thicknesses t1, t2 and t3, it was found that if the thickness is 0.8 mm or more, there is no problem in terms of strength, molding and light shielding, but it is better to be a little thicker if possible. It was In order to reduce the size of the camera, naturally, the thinner the better, so considering these things, the wall thickness is preferably 0.8 mm to 1.2 mm, and most preferably 1.0 mm. .

Then, as shown in FIG. 5 (a),
A large number of solder escape holes 20H are provided, and ribs 20R need to be provided at locations where strength is weak.

The wall thickness t4 of the rib 20R needs to be at least thicker than the wall thickness t2 around the rib 20R. By providing such ribs, it is possible to reinforce such a weak portion of the cover having a hole, for example.

[0069]

EFFECTS OF THE INVENTION According to the present invention, the thickness of the covers covering the lens-fitted film unit is adjusted to 0.8 mm to 1.2 mm, and ribs are provided at necessary places to reinforce the molded parts for strength. In addition, there is provided a film unit with a lens which has a smaller size and has no problem in light shielding.

[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 lens-equipped film unit according to the present invention.

FIG. 5 is a view of a front cover of the film unit with lens according to the present invention.

[Explanation of symbols] 20 Front cover 20H Solder relief hole 20R Rib 20S Strobe window t1, t2, t3 Wall thickness t4 Rib wall thickness

Front Page Continuation (72) Inventor Kojiro Yoshida 1st Sakura-cho, Hino City, Tokyo Konica Stock Company In-house

Claims (2)

[Claims] 1. A built-in exposure and film feeding means,
A film unit with a lens, which is preloaded with a film and is capable of taking a picture immediately, wherein a thickness of covers covering the unit is 0.8 mm to 1.2 mm. 2. The lens-equipped film unit according to claim 1, wherein the covers are made of resin, and a cover is used in which necessary portions are reinforced by ribs having a wall thickness that is at least thicker than a wall thickness around the cover.