JPH0269732A - Easy cartridge loading camera - Google Patents

Abstract

PURPOSE:To securely load a film with a simple constitution by rewinding the film once until the leader part of the film reaches specific length, rotating the cartridge to a film feeding position, and guiding the film tip to an exposure part by a guide member. CONSTITUTION:When the length of the film leader part L is larger than the specific value, the film F is rewound by a rewinding shaft and when the leader part end of the film F is detected and a leader end detection switch 11 is turned off, the rewinding shaft is reversed and rotated in a film winding direction. The film is wound closely around the spool of the cartridge in the beginning, but when the spool reverses, the film is loosened and spread to an outside cartridge cylinder, so that the cartridge 9 also rotates clockwise. At this time, the tip of the film is guided by a cartridge pillow 14 and securely sent to a film feeding roller 15. Consequently, the film F is securely loaded with the simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a cartridge-loading camera that can be loaded with the leading end of the film wrapped around the cartridge.

(Prior technology) In cameras, the automation of film loading has progressed, and when you open the back cover of the camera, insert the cartridge into the cartridge chamber, extend the leading edge of the film, close the back cover, and extend the shutter button, one frame is automatically captured. Auto-loading mechanisms are widely used. Recently, however, a simple cartridge-loading camera has been proposed that allows film to be loaded while the leading end of the film remains wrapped around the cartridge. For example, in JP-A-62-165636,
A camera has been proposed in which a cartridge is rotated by a cartridge rotation drive mechanism in a direction in which the film is unwound, and the leading edge of the film is guided to an exposure section along a guide surface formed on the inner periphery of the cartridge chamber. Also, JP-A-62-
Japanese Patent No. 201428 proposes a cartridge rotation drive mechanism incorporating an eccentric mechanism.

However, according to the former method, if the leading edge of the film is strongly curled, it is not always possible to insert the leading edge of the film into the exposure area reliably, and in the latter case, the number of parts increases due to the use of an eccentric mechanism. However, there was a problem that the device became complicated.

(Object and Structure of the Invention) The present invention has been made in view of the above points, and an object of the present invention is to enable reliable loading of film with a simple structure in a cartridge simple loading camera.

To achieve this purpose, we have developed a cartridge chamber that accommodates the cartridge, a rotating shaft that engages with and rotates the cartridge shaft when the cartridge is stored in the cartridge chamber, and a rotating shaft that rotates the cartridge when the cartridge is stored in the cartridge chamber. a detection means for detecting, and when the film is pulled out for a predetermined length or more, the rotating shaft is rotated in a film rewinding direction to rewind the film, and after the film has been rewound to a predetermined length, the rotation is performed. a rotating shaft control means for controlling the rotating shaft so that the shaft is rotated in a film winding direction to rotate the cartridge from a loading position to a predetermined film feeding position and thereafter feeding the film; When the film moves in the winding direction due to the rotation of the cartridge, the guide member comes into contact with the outer circumference of the cartridge and guides the leading edge of the film to the exposure section of the camera.

(Example) The present invention will be explained below based on the drawings.

FIG. 1 is a schematic diagram of an embodiment of the cartridge-loading camera according to the present invention, viewed from above the camera with the cover of the camera body removed.

In the figure, l is the camera body, 2 is the film exposure section, and 3 is the camera body.
is a film winding room, 4 is a photographic lens, 5 is a shutter, 6
is a film take-up reel, and 7 is a film guide.

8 is the patrone room where patrone 9 is housed.

10 is a DX contact for detecting DX information attached to the cartridge 9, 11 is a reader end detection switch for detecting the end of the leader section of the film F, and 12 is a cartridge detection switch for detecting the presence or absence of a cartridge. Switches 12 and 13 are installed below the cartridge 9 as shown in FIG. 2, and the reader termination detection switch 11 is connected to the contact 11a.
is turned on when it is pressed against the edge of the film F. Therefore, when only the leader portion of the film is exposed from the cartridge 9, the leader detection switch 11 is turned off.
When the film F is further pulled out, the soda end detection switch 11 is turned on. Also, cartridge detection switch 1
2 is turned on when the cartridge 9 is loaded in the cartridge chamber 8, and turned off when it is not loaded.

Furthermore, 13 in FIG. 1 is a cartridge holder for fixing the cartridge 9, and 14 is a cartridge holder that holds the leading edge of the film F at the film exposure section 2.
15 is a film feed roller, 16 is a photodiode, and 17 is an LED for detecting film transport.

The photodiode 16g and the LED 17 are provided at positions corresponding to the perforations of the film F, and the number of photodiodes 16 is equal to the number of perforations that have passed through.
A pulse signal is output from. This makes it possible to detect the amount of film transport (for example, in a 351-layer film, 8 perforations correspond to one frame).

FIG. 3 shows the cartridge chamber 8 with the cover la of the camera body attached, and (a) is a side view, and (b) is a plan view. This figure shows the cartridge removed, and a rewinding shaft 20 that engages with the spool (winding shaft) of the cartridge 9 is installed at the bottom of the cartridge chamber 8. 21 is a lid of the cartridge chamber 8, 22 is a cartridge presser spring attached to the lid 21, 23a and 23b are locking portions of the lid 21, and 24a and 24b are locking portions 23a,
A lock claw engages with a groove 23c of 23b to lock the lid 21, 24c is a lock button for lock operation, and 25 is an opening cover for positioning when loading a cartridge.

FIG. 4(A) is a plan view showing the cartridge chamber with the cover of the camera body removed, and the walls of the cartridge chamber are omitted in this figure and FIGS. 5 to 7.

In the figure, 24 is a lock lever having lock claws 24a, 24b and a lock button 24c.
24 is guided by a guide pin 26 and is movable in the lateral direction in the figure, or is constantly urged by a spring 27 in the right direction in the figure. 28 is a stop lever that stops the lock lever 24 in the open position, and the stop lever is connected to the shaft 30 by a spring 29.
is biased clockwise around the center. 30 is a connecting lever connected to the patrone presser foot 13;
0 is biased counterclockwise about a shaft 32 by a spring 31. Further, 33 is a cartridge presser lock, and the connecting lever 30 is restrained by a stopping portion 33a of this cartridge presser lock 33. Patrone presser lock 33
is biased clockwise about a shaft 35 by a spring 34. 36 is an open/close switch that detects whether the lid 21 is opened or closed.

A long groove 14a is formed in the cartridge pillow 14, and a shaft 3 embedded in the camera body l is formed in the long groove 14a.
7 is inserted. The cartridge pillow 14 is biased counterclockwise around a shaft 37 by a spring 38.

Next, the operation of the embodiment will be explained.

Fig. 4 shows the state when the lid 21 is open, (A) is a plan view, and (B) is a view of the lock lever 24 and the stop lever 28 as seen from the direction of arrow A in Fig. 4 (A). It is.

When you press the lock button 24c with your finger and slide the lock lever 24 to the left in the figure, the claw 24d of the lock lever 24
is stopped by the stop claw 28a of the stop lever 28, and the lock lever 28 is stopped at that position. As a result, the lock claws 24a, 24b of the lock lever 24 are removed from the lock portions 23a, 23b of the lid 21, and the lid 21 is placed in an open state. At this time, one end 14b of the cartridge pillow 14 is pushed by the lock lever 24 and the cartridge pillow 14 is rotated clockwise, so the tip 14c of the cartridge pillow 14 is retracted to a position away from the cartridge 9, and the cartridge 9 is loaded. It's getting easier.

The opening of the cartridge loading section is shaped as shown in FIG. 3(b), and is formed by the cartridge chamber 8 and the opening cover 25. The opening cover 25 is pivotally supported by the main body cover 1a in a rotatable portion outward from the cartridge chamber 8, and is normally in close contact with the main body cover 1a by a spring (not shown). Therefore, since the orientation of the cartridge 9 when loading the cartridge is limited to the direction shown in FIG. 4(A), the positional relationship between the leader end detection switch 11 and the leader portion of the film can be reliably regulated.

The connecting lever 30 is locked by a cartridge presser lock 33, and the cartridge presser 13 connected to the connecting lever 30 is also on standby at a distance from the cartridge 9.

Next, after the cartridge 9 is loaded into the cartridge chamber, the lid 2
1 is closed, as shown in FIG.
(see figure (b)) to move downward and release the lock lever.
24 and the lock lever 28 are disengaged, and the lock lever
24 is pulled by a spring 27 and slides to the right in the figure. Then, the lock claws 24a and 24b of the lock lever 24 engage with the lock portions 23a and 23b of the lid 21, respectively, and the M2
1 is locked and the open/close switch 36 is turned on, thereby detecting that the lid 21 is closed.

On the other hand, as shown in FIG. 5(a), when the lock lever 24 separates from one end 14a of the cartridge pillow 14, the cartridge pillow 14 is pulled by the spring 38 and rotates counterclockwise around the shaft 37, The tip 14c comes into contact with the film wrapped around the cartridge 9. At this time, the patrone presser 13
is still waiting at a distance from Patrone 9.

Next, when the length of the film leader section is equal to or greater than a predetermined value, the film F is rewound (in the direction of arrow B in FIG. 5(a)) by the rewinding shaft 20 (see FIG. 3(b)), and the film is When the tip of the film F leaves the cartridge pillow 14,
The end of the soda section is detected and the reader end detection switch 11 is activated.
turns off.

Then, the rewind shaft 20 is reversed and rotated in the film winding direction. When the length of the film leader portion is less than a predetermined value, the rewinding shaft 20 does not rotate in the rewinding direction but rotates in the one winding direction. Initially, the film is tightly wound around the spool of the cartridge, but when the spool is reversed, the film is unwound and spread out to the outside of the cartridge, thereby causing the cartridge 9 to also rotate clockwise in the figure. At this time, the tip of the film is
4, the film is reliably sent in the direction of the film feed roller 15 (see FIG. 1).

When the cartridge 9 is further rotated, its film delivery portion 9a hits the tip 14c of the cartridge pillow 14, as shown in FIG. 6(A), and pushes the cartridge pillow 14 down. The cartridge pillow 14 moves downward through the long groove 14a and presses down the cartridge presser lock 33, and along this, the connecting lever 3 is moved by the stopper portion 33a of the cartridge presser 33.
0 is released, and the cartridge presser 13 presses the cartridge 9. Patrone 9 or Patrone presser 1
3, film transport and DX information reading are stabilized.

Next, when the leading edge of the film F is sent to the film feed roller 15, the film F is pulled out by this roller 15, and the film F is further transferred to the photodiode 16 and the LED l.
7, the film is sent to the film exposure section 2, and is wound up by the film take-up reel 6. When the photodiode 16 detects film transport for three frames, autoloading ends.

From then on, the film is wound each time a shot is taken, and then rewound when all shots are taken. During this time, each member remains in the state shown in FIG.

Now, FIG. 7 shows a state in which the lid 21 is opened after the film has been rewound. When the lock lever 24 is moved to the left in the figure by pressing the lock button 24c, the lid 21 is opened as in the case of FIG. 4. At this time, when the shaft 9a of the cartridge 9 is pinched and pulled out, the opening cover 25 is lifted by the end 9b of the cartridge 9 (see Fig. 3).
Since the cartridge 9 can be taken out in the same orientation as shown in FIG. 7 when rewinding is completed, there is no need to change the orientation of the cartridge 9, making the operation easier.

Further, the connecting lever 30 is pushed by the lock lever 24, and the cartridge presser 13 is released from the cartridge 9. When the cartridge 9 is next taken out, the lime delivery portion 9c of the cartridge 9 and the tip portion 14c of the cartridge pillow 14 are engaged with each other. It comes off, and the cartridge pillow 14 is pulled by the spring 38 and lifted upward in the figure. Correspondingly, the patrone presser lock 33 also moves upward, and the connecting lever 3o is stopped by its stopping portion 33a, and each member is placed in a state similar to that shown in FIG. 4.

FIG. 8 is a block diagram showing the control system of the embodiment, in which the same reference numbers as in the previous figures indicate the same components.

In the figure, 40 is a film feeding motor M and M2
This is a film feeding control circuit that drives the . The rewind shaft 20 in FIG. 3 is driven by a motor MI via a coupling mechanism such as gears, and the film feed roller 15 and reel 6 in FIG. 1 are driven by a motor M2 via a coupling mechanism such as gears. 42 is a film transport amount detection circuit;
This circuit consists of the photodiode 16 and L shown in FIG.
It has an ED17 and outputs a signal according to the amount of film transport. 43 is a DX having a DX contact 10 (see Figure 1)
A code detection circuit, 44 a power supply circuit, and 45 a CPU that controls the operation timing of each circuit.

Next, the operation of this control system will be explained using the flowchart shown in FIG.

First, when the user opens the lid 21 and inserts the cartridge 9 into the cartridge chamber 8, or closes the lid 21 without inserting the cartridge 9, the CP
U45 checks whether the open/close switch 36 is on or off (F-1), and if the open/close switch 36 is on, that is, if the lid 21 is closed, then it checks the cartridge detection switch 12 (F-2). . At this time, if the cartridge 9 is not inserted, the cartridge detection switch 12 remains off, and the sequence ends. Since the cartridge detection switch 12 is on when the cartridge 9 is inserted, proceed to the next sequence and check whether the reader termination detection switch 11 is on or off (F-
3). If the leader end detection switch 11 is on, the motor M is driven to drive the rewind shaft 20 in the rewinding direction (F-4), and when the leader end detection switch 11 is turned off, that is, when the film F is The tip of the film F or the cartridge pillow 14 is rewound leaving only the leader part.
Stops the rewinding drive when it leaves the tip 14c of (
F-6). If the reader end detection switch 11 is off in step (F-3), the rewind drive is not performed to the 0th order.

The motor M is reversed and the rewind shaft 20 is driven in the winding direction (F-7), and the motor M2 is rotated to drive the film feed roller 12 and reel 6 in the winding direction (F-8). Next, a predetermined time N is set in the counter T (F-9), and it is checked whether this predetermined time N has elapsed (F-10). If the predetermined time N has not elapsed, the film transport amount detection circuit 42 determines whether or not the film is transported. Check whether detection has been performed (F-11). In other words, the photodiode 16 is a film or an LED 17
It remains on as long as it does not block the light from the perforation, and when the film is fed, the photodiode 16 blocks the light from the perforation or LED 17 and repeats on and off. This allows it to be detected whether the film has been transferred.

If film transport is not detected, the counter T is decremented (F-12) and the process returns to step (F-10).

If film transport is detected, then determine whether the film has been advanced by 3 frames (F-13), and stop motors M and M2 when the film has been advanced by 3 frames (F-14).
15) End autoloading. Note that if a predetermined period of time N passes without film transport being detected during film winding (F-10), the winding drive roller drive and reel drive are stopped (F-16, 17).
Abnormal due to some display method! Make a report (F-18)
.

By the way, some fixed-focus cameras have a lens barrel that can be retracted into the exposure chamber of the camera body when not in use.If the lens barrel is housed inside the camera and the front of the camera is flat, it is easier to handle when the camera is not in use. . However, when considering the application of the present invention to this type of camera, the photographing lens enters the exposure chamber, so if the film is loaded with the lens barrel in place, the curling of the film may be severe. There is a risk that the leader section may enter the exposure chamber and hit the photographic lens, damaging the lens.

FIG. 10 is a camera transportation route map that eliminates such a problem, and in the figure, the same components as in the previous figure are designated with the same reference numerals.

50 in the figure is a lens barrel that can be taken in and out of the camera body l,
The position of the solid line in the figure is the state where the lens barrel 50 is housed, two points &
aB indicates the position at the time of photographing. The lens barrel 50 is driven, for example, by a lens barrel drive motor via a gear train.

If you load the film in the stored position shown by the solid line, the leading edge of the film will hit the rear lens 51, potentially damaging the lens or causing an autoload error. By extending the barrel, the lens is moved to avoid hitting the leading edge of the film. On the other hand, a slope 52 is provided at the rear end of the lens barrel.
, and a slope 53 having the same inclination angle is formed in the vicinity of the lens barrel 50 on the main body side. Lens barrel 5o has one point 'l
When the position Q&iG is reached, the two slopes 52 and 53 are located on the same plane. Therefore, the leading end of the film is guided by the slopes 52, 53 and sent to the film winding chamber 3. It is preferable that the slopes have an inclination of 30 degrees or more with respect to the optical axis of the lens. Note that 54 in FIG. 10 is a photographing lens, and 55 is a shutter drive mechanism.

Figure 11 shows the case of a zooming camera.
Components that are the same as 0 are given the same reference numerals. In the case of a zooming camera, the previous inclined surface 52 is
．． Since it is not possible to have an inclination of 30 degrees or more like 53, the rear lens 51 is covered with a flat lens 56 to protect it.

(Effects of the Invention) As explained above, according to the present invention, the film is rewound by once rotating the cartridge shaft in the rewinding direction, the film pull-out portion is shortened to a predetermined length, and then the cartridge is The film is rotated from the loading position to a predetermined film feeding position, and the leading edge of the film is guided to the exposure section by a guide member, so even if the leading edge of the film is strongly curled, the film can be loaded securely. Since the film can be sent to the exposure section of the camera and there is no need to use a complicated eccentric mechanism unlike conventional devices, the film can be loaded reliably with a simple configuration.

[Brief explanation of the drawing]

Fig. 1 is a transportation route diagram of an embodiment of the cartridge simple loading camera according to the present invention, Fig. 2 is a diagram showing the positional relationship between the reader end detection switch, the cartridge detection switch, and the cartridge, and Fig. 3 is a diagram showing the lid and the cartridge of the cartridge chamber. A condylar line diagram showing the camera body with the cover attached, Figures 4 to 7 are diagrams explaining the operation of the embodiment, Figure 8 is a block diagram of the control system of the embodiment, and Figure 9 is A flowchart explaining the operation of the control system, and FIGS. 1O and 11 are condylar route diagrams showing other embodiments. 8...Patrone room, 9...Patrone, 11...
・Reader end detection switch, 14...Patrone pillow. 41...Motor

Claims (1)

[Claims] a cartridge chamber for accommodating a cartridge; a rotating shaft that engages with and rotates a winding shaft of the cartridge when the cartridge is stored in the cartridge chamber; a detection means for detecting the drawn-out state of a film leader; When the film has been pulled out to a predetermined length or more, the rotating shaft is rotated in the film rewinding direction to rewind the film, and after the film has been rewound to the predetermined length, the rotating shaft is rotated in the film winding direction. By this, the cartridge is rotated from the loading position to the predetermined film feeding position,
a rotary shaft control means for controlling the rotary shaft so as to feed the film thereafter; and a rotary shaft control means for controlling the rotary shaft so as to feed the film thereafter; and when the film moves in the winding direction due to rotation of the cartridge, the leading end of the film is guided to the exposure section of the camera by contacting the outer circumference of the cartridge. 1. A cartridge simple loading camera characterized by having a guide member.