JPH0731229Y2 - Film unit with lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a photographic film packaging unit (hereinafter referred to as a "film unit with a lens"), and more particularly to a film unit with a lens to which an exposure function for photographing is provided in advance.

[Conventional technology]

Conventional photography is usually carried out by loading a camera with a film. However, in general, there are many cases where the camera is not carried in daily life, and there is an inconvenience that the camera is not at hand when the user wants to take a picture. in this case,
You can purchase a film unit with a lens at a low price like purchasing a regular photo film from the nearest store, and you can shoot a subject like a conventional camera, and after shooting, complete the DPE with lens unit. It would be convenient if you could request.

In order to meet such demands, the applicant provided a film unit with a lens “Sharp Run” (trade name) in which a 110 film is housed in a case with a lens. This product is convenient, so it is used a lot, but since the film screen is small, it was desired to make a larger film unit with a 35mm lens. In order to meet such demands, the applicant of the present invention has provided a film unit with a lens, which stores a 35 mm-sized film, “Shashinrun Hi” (trade name).

[Problems to be solved by the invention]

The film exposure and hoisting mechanism adopted in the lens-equipped film unit "Shashin-run Hi" is Shoukaisho 62-569.
As disclosed by No. 4, since the winding stop member of the winding knob and the shutter blade drive member are separate parts, they are devised so that they work well together.
There is a problem that the number of parts is large and the work in the assembly process is troublesome. Further, if the number of parts is large, it leads to an increase in cost, and in the lens-fitted photo film unit that needs to be set at a price not much higher than the price of the film, improvement of these has been desired.

The present invention has been made in view of such circumstances, and an object thereof is to provide an inexpensive lens-fitted film unit by simplifying and downsizing the photographing / winding mechanism.

[Means for solving problems]

In order to achieve the above object, the present invention provides a lens-fitted film unit having a built-in photographing film and a photographing mechanism, and a first member for driving shutter blades for opening and closing a photographing opening in an opening direction. , A second member for displacing a film winding member connected to the winding core from a state where the rotation of the film winding member is blocked to a state in which the rotation is allowed, in order to wind up the photographed film on the winding core; Rotatably provided with a driving member having a third member integrally formed with the first and second members, the third member engaging with a cam member coaxially attached to a driven body driven by the film to be fed. , The shutter release operation releases the locked state between the third member and the cam member by axial displacement between these members, and the third member is displaced in the direction of the rotation center of the cam member to drive the drive. Means initial position Is displaced in a state in which al the first and second members is actuated, a predetermined amount of rotation of the film follower, is characterized in that characterized in that said driving means and so as to return to the initial position.

[Action]

According to the present invention, the first member for driving the shutter blades in the opening direction, the second member for displacing the rotation of the film winding member from the rotation blocking state to the rotatable state, and the follower attached to the film are attached. There is provided drive means integrally formed with a third member that engages with the cam member. Therefore, the shutter release operation releases the locked state between the third member and the cam member, displaces the third member in the direction of the rotation center of the cam member, actuates the first member to drive the shutter blades, and at the same time, the film. The driving means can be returned to the initial position by rotating the driven body by a predetermined amount.

〔Example〕

Hereinafter, preferred embodiments of a lens-fitted film unit according to the present invention will be described in detail with reference to the accompanying drawings.

In this embodiment, the most popular international standard ISO1
An example using a film unit with a lens, which uses a 135 film with a Patrone specified in the 007-1979 edition, will be described.

FIG. 1 shows the overall structure of a lens-fitted film unit according to the present invention, in which 10 is a unit body, 12 is a front cover, and 14 is a back cover. These are made by plastic molding and are the main members of the lens-fitted film unit. As will be described later, the front cover 12 and the back cover 14 are connected to the unit main body 10 from the front and rear, and then fixed by ultrasonic welding or the like. Therefore, the user cannot remove the film 16 built in the main body 10 from the inside of the unit main body 10.

The assembled film unit is formed into a rectangular parallelepiped shape as a whole, is covered with a paper box (not shown), and is configured so that a photographing operation can be performed through a shutter button hole, a lens hole, etc. opened in the paper box.

First, the unit body 10 will be described. The cartridge storage chamber 20 and the roll-shaped film storage chamber 22 are formed at a predetermined interval, and the cartridge storage chamber 20 and the rolled-film storage chamber 22 are formed.
Since openings 20A and 22A are formed on the lower surface of the film, the film 16 is loaded into the cartridge storage chamber 20 and the roll-shaped film storage chamber 22 from below. In the film unit according to the present invention, the film 16 is pulled out from the cartridge 24 in advance, and the photographed films are sequentially stored in the cartridge. Therefore, the film 16 is loaded into the cartridge storage chamber 20 while being stored in the cartridge 24, and then wound up and stored in a roll shape in the storage chamber 22. Note that the method is not limited to this method, and the film 16 may be unwound from the cartridge 24 in the dark room to be in the roll state 26 and then loaded into the storage chambers 20 and 22 from the lower surface.

An exposure frame is formed between the cartridge storage chamber 20 and the roll-shaped film storage chamber 22 of the unit main body 10. A cartridge storage chamber 20, a roll-shaped film storage chamber 22, and a rectangular frame body 28 are formed around the exposure frame. The lower surface of the frame 28 is provided with the openings 20 of the storage chambers 20 and 22 for loading the film 16.
An opening communicating with A and 22A is formed.

A winding knob 30 that constitutes a film winding member is provided above the cartridge storage chamber 20 so as to be rotatable and axially movable. As shown in FIGS. 2 and 3, since a fork is formed at the lower end of the rotary shaft 30A of the hoisting knob 30, it can be engaged with the patrone shaft 32 of the patrone 24. Therefore, when the hoisting knob 30 is rotated in the direction of the arrow in FIG. 1, the photographed film 16 becomes a roll-shaped film storage chamber.
It is stored in the Patrone 24 from 22. In addition, on the upper part of the hoisting knob 30, there is a ring-shaped ridge having an uneven portion formed around it.
A shutter button 33 and a shutter button 33 are integrally formed on the same axis.
Further, the unit body 10 includes a drive lever 34 and a cam which will be described later.
A photographing mechanism including a shutter blade 40, a driven sprocket 108, and the like is provided.

A shutter blade 40 is pivotally supported on the front surface of the unit body 10 via a shaft 40A. Since the shutter blade 40 is biased counterclockwise by the spring 40B, the photographing opening 42 can be closed. Incidentally, 41 is a stopper of the shutter blade 42.

A plate-shaped lens holder 44 shown in FIG. 1 is provided on the front surface of the shutter blade 40. A hole 46 is formed in the lens holder 44 at a position corresponding to the photographing opening 42, and a plastic photographing lens 48 is arranged in the hole 46.

Next, the front cover 12 will be described. Top plate of front cover 12
An opening 52 for a shutter button is formed in 50, and the shutter button 33 is arranged in this opening 52. or,
Since the upper plate 50 is formed with the window 54 for displaying the number of shots, the window 54 displays the number of shots on the display plate (not shown). A finder opening 58 is formed in the front surface 56 of the front cover 12. Further, a circular hole 60 for photographing is formed on the front surface 56, and the circular hole 60 is formed so as to be located on the optical axis of the photographing lens 48.

Next, the structure of the back cover 14 will be described. The back cover 14 is a back plate
61 and the bottom plate 62 are formed in a substantially L shape. A finder opening 64 is formed in the back plate 61, and the finder opening 64 is formed at a position corresponding to the opening 58 of the front cover 12. Further, a horizontally long opening 66 is formed in the back plate 61,
The opening 66 exposes a part of the hoisting knob 30 after assembly, and is configured so that the hoisting knob 30 can be rotated from the outside of the back plate 61. Further, a curved film supporting surface 68 is formed on the back plate 61, and when the winding knob 30 is rotated, the film 16 moves along the film supporting surface 68. In addition, the bottom plate 62 of the back cover 14 is
When the assembly is attached to the unit main body 10, the openings 20A and 22A formed at the lower portions of the cartridge storage chamber 20 and the roll-shaped storage chamber 22 can be covered. That is, the film 16 is attached to the unit body 10
After being stored between the cartridge storage chamber 20 and the roll-shaped storage chamber 22, when the back cover 14 is pushed in, the film 16 is stored in the main body 10 in a light-tight state. After that, the unit body 10 and the back cover 14 are fixed by ultrasonic welding or the like, and the front cover
The back cover 12 and the back cover 14 are fixed to each other by ultrasonic welding or the like.

Next, the shutter operating mechanism will be described. As shown in FIGS. 5 and 6, the drive lever 34 is pivotally supported on the upper surface of the unit main body 10 about the shaft 70, and is biased in the counterclockwise direction about the shaft 70 by the spring 72. In addition, the claw 34A has a ridge 31
Is urged to engage the outer peripheral surface of the. A pawl 34B is formed on the drive lever 34, and the pawl 34B engages with the outer periphery of the hoisting knob 30 to stop the hoisting knob 30 after shutter release, as shown in FIG. . Further, a protrusion 34C is formed on the drive lever 34, and the protrusion 34C faces a position where it abuts on the cam 36.

As shown in FIGS. 2 and 3, the cam 36 is connected to a follower, that is, a sprocket 108, which engages with the perforation of the film 16, and a shaft 74. Therefore, when the sprocket 108 is driven by the film, the cam 36 also rotates in the same direction as the sprocket 108. As shown in FIG. 4, the cam 36 has a projection 36B which is fitted in the recess 34D of the drive lever 34 at a position 180 ° opposite to the cam surface 36A which abuts the projection 34 and rotates the projection 34. A pair of recesses 36C into which the protrusions 34C are fitted are formed. The circular plate 37 integrally formed with the cam 36 coaxially has notched arc-shaped spring pieces 37A, 37A, and is further bent downward. As shown in FIG. 2, the circular plate 37 is arranged with a slight gap from the upper surface 10A of the unit main body 10. The disc 37 is positioned below the disc so that a part 37B of the disc outer periphery interferes with the hoisting knob 30, and when the shutter button 33 of the hoisting knob 30 is pushed down by a finger, as shown in FIG. Then, the cam 36 moves downward together with the winding knob 30 against the spring piece 37A. Also, shutter button 33
When the finger is released from the cam, the cam 36 moves upward due to the restoring force of the spring piece 37A, and the hoisting knob 30 also moves upward to the position shown in FIG.

At the position shown in FIG. 2, the projection 34C of the drive lever 34 is in contact with and locked by the step portion 36D of the cam 36. Further, the claw 34A is located in the groove 31A, apart from the protrusion 31. When the shutter button 33 is pressed in this state, as shown in FIG. 3, the projecting piece 34C is disengaged from the step portion 36D of the cam 36 and the drive lever 34
Is rotated by the spring 72. At the same time, the claw 34A engages with the protruding portion 31 to prevent the hoisting knob 30 from hoisting.

The operation of the lens-fitted film unit according to the present invention constructed as described above will be described.

First, when the winding knob 30 is rotated counterclockwise from the state shown in FIG. 5 to wind up the film 16, the driven sprocket 108 engaged with the perforation of the film 16 is rotated in the same direction. Therefore, the cam 36 integrated with the sprocket 108 also rotates counterclockwise. When the cam 36 rotates counterclockwise, the protrusion 34C located in the recess 36C of the cam 36
Comes into contact with the cam surface 36A, and when further rotated, the drive lever 34
Is rotated by pressing, so that the drive lever 34 rotates about the shaft 70 in the clockwise direction. When the hoisting knob 30 is further rotated, the drive lever 34 is rotated clockwise to the state shown in FIG. 6, so that the protrusion 36B of the cam 36 fits into the recess 34D of the drive lever 34, and 34B engages with the outer periphery of the hoisting knob 30 to prevent the hoisting knob 30 from rotating. When one frame of the film has been fed in this way, the hoisting knob 30 does not rotate, and it is possible to prevent the film from being fed too much. At this time, the protruding piece
34C is engaged with the step portion 36D of the cam 36.

In this state, when the shutter button 33 is pushed down, the winding knob 30 is lowered to the position shown in FIG. 3, and at the same time, the disk 37 of the cam 36 which interferes with the winding knob 30 is also pushed down. Therefore, the protrusion 3 of the step portion 36D of the cam 36 and the drive lever 34
The engagement relationship with 4C is released. Protrusion 34C of drive lever 34
When the engagement between the cam 36 and the cam 36 is released, the drive lever 34 moves to the sixth position.
It is rotated counterclockwise from the position shown in the figure by the urging force of the spring 72, resulting in the state shown in FIG. Drive lever 34
Since one end 34E of the kicks the projection piece 40C of the shutter blade 40,
The shutter blade 40 rotates about a shaft 40A shown in FIG. 1 to open the opening 42. Therefore, the film is exposed. The shutter blade 40 is returned and rotated by the urging force of the spring 40B after opening the photographing opening 42, and closes the opening 42 as shown in FIG. Further, the drive lever 34 kicks the projecting piece 40C of the shutter blade 40 over the projecting piece 40C, and then the spring 7
As shown in FIGS. 3 and 5, the urging force of 2 brings the claw 34A into contact with the outer periphery of the ring-shaped protrusion 31. Therefore, while the shutter button 33 is being pressed, winding cannot be performed. Next, when the exposure is finished and you release your finger from the shutter button 33,
As shown in FIG. 2, since the hoisting knob 30 rises and the engagement between the claw 34A and the protrusion 31 is released, the claw 34A is formed in the groove 31A between the protrusion 31 and the hoisting knob 30. To position. Therefore, the hoist knob 30
The film can be wound up.

As described above, with the lens-fitted film unit according to the present invention, it is possible to perform frame-by-frame feeding and filming of the film with a simple imaging mechanism.

In the lens-fitted film unit according to the present invention, the rotating shaft 30A of the hoisting knob 30 is locked to the cartridge shaft 32 to feed the film 16, and the hoisting knob 30 is locked after one frame has been fed. Therefore, since the film 16 is not pulled too much, it is possible to prevent the perforation of the film 16 from being damaged. That is, in many conventional cameras, the sprocket that is driven by being engaged with the film perforation is locked to prevent the film 16 from being wound. In this method, the film is wound without noticing that one frame has been fed. There is a case where the upper knob is turned too much and the film 16 is pulled too much, and the perforation is damaged by the locked sprocket. According to the present invention, this can be prevented.

The sensitivity of the film used in this invention is ASA100, 200, 40
Any one such as 0, 1000, 1600 may be used.

The present invention is not limited to the lens-fitted film unit, but can be used as a photographing mechanism for any camera that uses a perforated film.

[Effect of device]

As described above, according to the lens-fitted photo film unit of the present invention, the drive lever drives the shutter blade, and the drive lever is provided with the lock part for locking the film after feeding the film one frame. It is possible to reduce the number of parts of the photographing mechanism, simplify the structure, and reduce the cost.

[Brief description of drawings]

1 is an exploded perspective view of a lens-fitted film unit according to the present invention, FIGS. 2 and 3 are cross-sectional views of a lens-fitted film unit according to the present invention, and FIG. 4 is a lens-fitted film unit according to the present invention. FIG. 5 and FIG. 6 are perspective views of the cam used in the unit, and are plan views of the essential parts of the film unit according to the present invention. 10 …… Unit body, 12 …… Front cover, 14 …… Back cover, 16
…… Film, 24 …… Patrone, 30 …… Winding knob, 30
A …… Rotating axis, 32 …… Patrone axis, 34 …… Drive lever, 36 …… Cam, 40 …… Shutter blade, 108 …… Sprocket.

Claims (3)

[Scope of utility model registration request] 1. A lens-fitted photo film unit having a photo-taking mechanism built-in in advance, which comprises a first member for driving shutter blades for opening and closing a photo-taking opening in an opening direction, and a photo-finished film for winding. In order to wind up on the core, the film winding member connected to the winding core is arranged in the film feeding path and the second member which is displaced from the rotation-prevented state to the rotation-allowed state, and is fed. A rotatably provided drive means having a third member engaging with a cam member coaxially attached to a follower driven by the film, the first member and the second member being integrally formed; and a shutter release operation. The locked state between the third member and the cam member is released by axial displacement between these members, the third member is displaced in the direction of the rotation center of the cam member, and the drive means is moved from the initial position to the first position. 1, 2 members A lens-fitted film unit, wherein the driving means is returned to an initial position by displacing the driving means in an actuated state by a predetermined rotation amount of the film driven body. 2. A core of a patrone is connected to the film winding member, and an unexposed film pulled out from the patrone is arranged in a roll shape at a position opposite to the patrone with respect to a photographing optical path. A film unit with a lens according to claim (1), characterized in that 3. A film for protecting the back of the film from light is prevented from being taken out unless the photo-taking mechanism and the main body for housing the film are partially broken. The film unit with a lens according to claim (2) for utility model registration.