JPS58116529A - Easy film loading camera - Google Patents

Abstract

PURPOSE:To wind securely a leader part around a film take-up shaft by fixing one end of a flexible belt with engaging projections to the belt take-up shaft and then winding the belt, and superposing the film leader part on the flexible belt and feeding the film leader part between a pressure plate and an exposure frame. CONSTITUTION:A guide belt 1 has engaging projections 6 arrayed at such specific intervals that perforations of a film F of 35mm. size engage the projections; one end is fixed to the guide belt take-up shaft 4 and the other end is free. When the guide belt 7 is at a stand-by position as shown in a figure, rotating the guide belt take-up shaft 4 clockwise with a cartridge P loaded allows the guide belt 1 to run and perforations of the leader part FL engage engaging projections 6 to feed the leader part FL toward the film take up shaft 5; when the front end of the leader part reaches the film take-up shaft 5, an automatic winding mechanism winds the leader part FL around the film take-up shaft 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera with simple film loading, and in particular, it eliminates the need for manual pulling out of the leader section of a 35% film containing hatrones.

This invention relates to a simple loading camera that is improved so that the film can be easily and reliably wound around a film winding shaft.

BACKGROUND ART Conventionally, a camera is known in which an automatic winding mechanism of a film leader is provided on the inside in order to simplify the loading of a 35% cartridge. However, the length of the film leader that is pulled out in advance from the cartridge to be loaded varies depending on the manufacturer, and in the case of a film that has been pulled out for a long time in advance, an automatic winding mechanism is installed in the winding chamber. However, in the case of a film that has a short pull-out amount, the operator must pull it out and set it by himself until it reaches the automatic winding mechanism, which is cumbersome to operate. Instead of pulling it out by hand, it is conceivable to engage the quill rem feed sprocket built into the camera with the film leader's no.-folation and pull it out automatically, but the engagement operation is difficult. , the initial pull-out resistance of the father film leader is
This is several times greater than the pull-out resistance during film transport during shooting, and even if the sprocket is forcibly rotated and the leader is pulled out, the perforations will break and the film league section will be damaged. There was a risk that a situation would arise in which it would become impossible to draw out the parts, making it impossible to take pictures.

In addition, even if the film feeding sprocket is improved so that it can be effectively engaged with the nozzle formation of the leader section and the initial pull-out resistance is reduced (for example, an endless perse method according to Utility Model Application No. 56-37696, or Even if the double sprocket system in which the pawls are shaped like round pins as disclosed in Japanese Patent Application No. 56-122239 is adopted, this method cannot be applied to an eye reflex camera. It is necessary to place a focal plane shutter mechanism around the exposure frame.
This is because the existence of this mechanism prevents the film feeding means from being self-contained. Now, it may be possible to arrange the quill rem feeder outside the focuser and lens shutter mechanism, but this would be extremely inconvenient since the width of the camera would be too narrow.

The present invention has been made in view of the above-mentioned drawbacks, and it eliminates the need for manual adjustment of the film league section when loading a film, regardless of the length of the drawer of the film leader section. The main objective is to provide a camera that can be wound around a film winding shaft.

Another object of the present invention is to automatically wind the film league part, which is difficult to handle when loading a trone, onto the film take-up shaft without any operator's intervention, and to It is to repair the mechanism so that it can be easily and reliably returned to its original state.

Still another object of the present invention is to configure the film feeding means in a continuous manner in the exposure frame, and to apply the film to a camera with a focal plane shutter mechanism, particularly a single-lens reflex camera, in which film can be easily loaded. The goal is to put this into practical use.

In order to achieve the above-mentioned object, the present invention has a 35mm IJ size film (in a camera that takes pictures with a Trone loaded, a light rem provided on the opposite side of the Trone loading chamber) (centered on the exposure frame). The winding chamber is equipped with a film winding shaft, and between the exposure frame and the film winding shaft, there is a flexible member winding shaft which is fixed to one end of a flexible member for guiding the soil rem reader section and is wound. and the flexible member has engaging protrusions arranged at a regular pitch that can engage with perforations formed in the film league part, and the flexible member From the position where the cartridge is pulled out beyond the exposure frame toward the cartridge loading chamber,
By feeding the flexible member after loading the cartridge,
The gist is that the film league portion is pulled out and guided to the film take-up shaft, and then wound onto the flexible member take-up shaft, and further the flexible member is moved from the flexible member take-up shaft to the above-mentioned flexible member take-up shaft. The present invention is characterized in that a means for returning the flexible member to the drawn-out position is provided separately from the flexible member winding shaft.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 is a perspective view of essential parts for explaining the first embodiment. P is a cartridge, FL is a leader part of the film F, 1 is a flexible guide bell), 2.3 is a roller, 4 is a guide belt winding shaft, and 5 is a film winding device equipped with an automatic film winding mechanism. It is the axis.

The guide belt 11 has retaining protrusions 6 arranged at a regular pitch that can engage with the half-origination of the film F of 135 mm size, one end is fixed to the guide belt winding shaft 4, and the other end is a free end. ing.

When the guide belt 1 is in the standby position shown in FIG. 1, when the cartridge P is loaded and the guide belt winding shaft 4 is rotated clockwise in the figure, the guide belt 1 runs and the engaging protrusion 6
The perforation of the leader part FL engages with the league 1'';1% F L is sent in the direction of the film winding shaft 5, and when the tip of the leader part reaches the film winding shaft 5, the automatic winding mechanism closes the leader part FL. When the film is being taken up on the film winding shaft 5, it is in the state 1 shown in Fig. 2.
The free end of the guide belt 1 is connected to the running path of the film F and the roller 2.
, 3. The rollers 2 and 3 are moved in conjunction with the reverse rotation of the guide belt winding shaft 4 to return the guide belt from this position to the standby position shown in FIG.

This is done by a belt 9 returning means comprising a guide rail (not shown) that guides the widthwise end portion of the guide belt 1.

A specific example will be shown.

Fig. 3 is a perspective view of the camera of the first concrete example with the back cover opened, Fig. 4 is a perspective view with some parts disassembled and showing the guide belt 1 as the center, and Fig. 5 is an exposure The old side view of the frame and its surroundings is particularly for explaining the guide rail, and FIG. 6 is a sectional view taken along the line ■--■ in FIG. 5, and FIG. 7 is a sectional view taken along the line m-m4 in FIG. 5. It should be noted in advance that the camera of this first example is equipped with a mechanism that more thoroughly automates film loading, in addition to a mechanism that automatically advances the film league section without the need for manual operations. I'll keep it.

In FIG. 3, 10 is a camera body, 11 is a back cover, and the back cover 11 is supported by a hinge 12 at the L portion of the camera body 10 so as to be openable and closable. In the camera body 10, an exposure aperture frame 13 is formed at the center of the camera body 10.A cartridge loading chamber 14 is provided on one side of the exposure aperture frame 13, and a film winding chamber 15 is provided on the other side of the exposure aperture frame 13. This film winding chamber 1
A film winding shaft 5 is provided within the film winding shaft 5, and a known automatic film winding mechanism is attached to the film winding shaft 5.

The film guide roller 17 forms a part of this automatic film winding mechanism, and is pivotally supported by the tip of a leaf spring whose one end is connected to the back cover 11. 18 is a film guide plate that guides a part of the film league during cartridge loading; 19 is a pressure plate; the film guide plate 1 is supported by four pressure plate support springs 20;
8 is elastically supported. Reference numeral 21 denotes a pressure plate spring fixed to the back cover 11. When the back cover 11 is closed, the pressure plate spring 21 presses the back surface of the pressure plate 19, causing the pressure plate 19 to move onto the film guide plate 18.
Reference numerals 5 and 23 denote film separation plates, which are used to enter the exposure aperture frame 13 in the F direction through the holes 22 formed in the .
24 is a film measuring sensor, 25 is a film cutter for cutting extremely difficult to pull out film;
26 is a battery compartment in which batteries are stored. The battery is a driving source for the motor built into the film winding shaft 5.
Reference numeral 7 denotes a back cover locking member that locks the back cover 11 by engaging with a back cover locking hook 28 provided on the bottom surface of the camera body 10. Reference numeral 29 is a clutch shaft that is bonded to the tapered portion 30 of the back cover locking member 27 when the 1% cover 11 is locked and opened, and controls the running of the guide belt.

As shown in FIG. 4, the guide belt 1 is located between the exposure frame 13 and the film guide plate 18, and when the cartridge 9-ne is loaded, the guide belt 1 is connected to the vicinity of the film exit (near the port of the cartridge) and the film separation plate. 23 near the left end in the figure, and two upper and lower guide rails 31.3.
1 to guide the end portion in the width direction, and the free end thereof is guided to a glue 7'' groove 32 formed in the optical axis direction at a position near the film exit.

The guide belt 1 is flexible and is formed from a synthetic resin film having elasticity as required. The belt surface has two rows of feeding pawls 6, and the positions of these pawl rows are provided at positions corresponding to the film perforations, and the spacing pitch of the pawls is equal to or slightly similar to the perforation pitch specified by the JIS standard. It is designed to be larger.

When the material of the guide belt 1 is made of a plastic thin film, a metal claw member is fixed by caulking, adhesive, or the like. Further, the material may be a thin metal plate, and in this case, it can be easily formed by punching. In this example, the thickness is 84μ and the length is about 120a.
+ plastic thin film is used, and the feed claw has a thickness of 0.1
Caulk a rectangular gold plate (1) so that the length along the worst side of the rectangular perforation (2 mn x 3 m) is about 2 m and protrudes about 0.5 m from the surface of the plastic thin film. Created with.

Of course, the pressure plate 19 may press the guide belt 1 on which the feed pawl 6 is located (such as when the guide belt 1 is above the exposure frame 13 and 11 is closed behind it).
, on the front surface of the pressure plate 19, there is a relief f +
33.33 is formed.

Details of the manner in which the guide belt 1 is provided and the guide rail 31 are shown in FIG. 5 and FIG.
7, which is an m-tn line analysis surface of FIG. 5, will be explained with reference to FIG.
1 is a guide belt retraction chamber formed in the optical axis direction on one side (film winding chamber side) of the camera body 40;
The above-mentioned group groove 32 is formed on the side of the camera body 400 (on the cartridge loading chamber side). 4 is a guide belt winding shaft provided at the bottom of the guide belt retraction chamber 41, and one end of the kite belt 1 is fixed to this guide belt winding shaft 4. Reference numerals 42 and 43 designate a pair of roller shafts installed in parallel above the guide belt take-up shaft 4 and slightly lower than the plane position of section E of the camera body 40. Linked with. roller shaft 42,
A cylindrical rubber member having a thickness of 43 is fitted onto both ends of each of the rollers 43 so as to press against each other to form rubber rollers 42' and 43' at both ends. As a result, in the middle part of the roller shafts 42 and 43,
A gap 44 is formed between the holes 2 and 2. This gap 44 is for passing the feed pawl 6 of the guide belt, and on the other hand, the rubber rollers 42' and 43' are for pinching and feeding both ends of the guide belt 1.

Although a single notch 45 was formed on the lower surface, the idle rail 31
over the width of the camera body 40 around the exposure frame, and
They are fixed to the camera body 40 so as to be parallel to each other with an interval slightly wider than the width of the film F. A guide groove 46 is formed by the -strip notch 45 and the -L surface of the camera body 40, and this guide groove 46 regulates both ends of the guide belt 1 in the width direction and also in the downward direction F. It is regulated. A bending part for guiding is formed at both ends of the guide rail 310, and at the left end in the figure, a bending part 47 bent in the direction along the group groove 32 allows the free end of the guide belt 1 to be connected to the group groove. On the other hand, at the right end in the figure, a cross-sectional path 1-<,
The guide belt 1 is formed by the bent portion 48 bent into a 4-shape.
is guided into the guide belt retraction chamber 41.

Note that the four notches 49 provided in the guide rail 31.
49, 49.49 are four rectangular parts 19' of the pressure plate 19,
19', 19', 19' are approximately the camera body part 40
This is to allow it to pass up to near the top surface of the. Further, the rectangular portions 19', 19', 19', and 19' are provided so as to correspond to pressure plate support points consisting of four protrusions (not shown) provided on the upper surface of the camera body portion 40. The upper surface of the two protrusions is approximately 0.0 mm lower than the upper surface of the film tray 50.
It is built 0.5m high. The yoke-like protrusion is no different from a regular camera.

Next, a mechanism that fully automates film loading, that is, in accordance with the operation of dropping the cartridge P into the cartridge loading chamber 14, the film leader FL is advanced to automatic loading, and is moved to a predetermined shooting position on the exposure frame 13L side. The guiding mechanism will be briefly explained. Referring again to FIG. 4, the cartridge loading chamber 14 is formed to have a circular profile that approximates the cross-sectional shape of the cartridge P, and a portion of the circular profile is cut along the tangential direction of the circular shape. It is cut out to form a notch 6o, and a receiving part 62 for receiving the film outlet 61 of the cartridge P is formed below this notch 60. On the other hand, a wall 64 along the width direction of the camera body 1o is formed between the bottom surface part 63 of the camera body 10 and the guide rail 31, and a triangular notch-shaped protrusion is formed at the left end of the vaginal wall 64. 65 are provided. Also, a flat plane 6 at the upper end of the wall 64
6 is slightly lower than the flat plane 68 of the wall 67 forming the cartridge loading chamber 14, and the guide plate 1
A slit 69 is formed between 8 and the flat plane 66 (see FIG. 3).

The triangular protrusion 65 regulates how the cartridge P is loaded. In other words, the V-shaped recessed portion 71 formed by the film outlet 61 and the body plate 70 of the cartridge is
Unless the cartridge is in a state of engagement with this triangular protrusion 65, the cartridge P is moved along its axial direction into the cartridge loading chamber 14.
This is because it cannot be inserted into. triangular protrusion 65
When the cartridge P is inserted into the cartridge loading chamber 14, the slit 69 is inserted into the film leader section L.
While showing his full potential, he skillfully guides the camera into the camera.

Moreover, even if the film leader part FL is wrapped around the outer circumferential surface of Parrone P due to curling characteristics, the wall 6
The lower end of the film leader comes into contact with the corner edge 72 on the front side of 4, and the films are successively stretched in the radial direction of the cartridge along this edge 72. After the cartridge P is inserted, the shape of the cartridge loading chamber 14 itself regulates its posture.
- The holder 62 of the film outlet 61 of the cartridge P holds the cartridge P in a fixed position. In this way, by simply dropping the cartridge P, such as a cassette tape, into the cartridge loading chamber 14, the film leader FL is set at a predetermined position.

Next, the operation of feeding the film leader unit set at a predetermined position (guide pel) If) will be explained mainly in FIGS. 8 and 9.
This will be explained with reference to the figures.

FIG. 8 is a schematic cross-sectional view of the camera shown in FIG. 3 taken along line I--I with the back cover 11 closed.

FIGS. 9(al) to (a7) show the feeding of the guide belt 1,
Explanatory diagram for explanation, same figure (bl), (b2),
(b4) is a cross-sectional view of the central part of the exposure frame 13 taken along a cross section perpendicular to the feeding direction of the guide belt 1; The diagram (a4) corresponds to this.

FIG. 9(al) shows the lifting platform with the guide belt 1 in the standby position, and when the back cover 11 is closed as shown in FIG.
As shown in bl), even when the pressure plate 19 is press-fitted into the exposure frame 13, the feed claw 6 of the guide belt 1 escapes through the escape groove 33.

On the other hand, in response to the closing operation of the back cover 11, the motor installed in the film winding 1 [1] 5 rotates forward, and as the quill rem winding shaft 5 rotates forward (this, the guide belt winding The clutch of the take-up shaft 4 is engaged (details of the clutch will be described later), and the guide belt take-up shaft 4 also rotates in the normal direction as shown in FIG. 9 (a2). The rubber rollers 42' and 43' also rotate so as to send the guide belt 1 into the guide bell retraction chamber 41.As shown in FIG.
The feed pawl 6 engages with the perforation to pull out the film and lume F from the cartridge P and send them together with the guide belt 1 toward the film winding chamber 15.

When the leading end of the leader reaches the E section of the guide belt evacuation chamber 41, as shown in FIG. 1, and further, the tip of the leader portion is guided downward along the leaf spring surface of the film guide roller 17, and from the position where it is caught between the film guide roller 17 and the film winding shaft 16, When the film has rotated approximately 300 degrees, it is further caught in the winding roller 55, and the film leader part FL is attached to the film winding shaft 1.
6 is automatically wrapped.

On the other hand, when the guide belt 1 is fed by a certain amount by the action of the clutch, it stops at the position shown in FIG. 9 (a3). That is, the free end of the guide belt 1 is connected to the film F.
and the exposed surface of rubber roller 42'.

When the guide belt winding shaft 4 reaches the intermediate position 43', the clutch is disengaged and the guide belt winding shaft 4 stops.

In this state, as shown in FIG. 9(b4), the guide belt 1 is no longer on the far side of the exposure frame 4, so the film F is pressed down by the pressure plate 19 and the film F is moved down to the photographing position. It comes to be located on the guide rail 50,F.

The film winding shaft 16 continues to rotate to wind the film F, and when the film measurement sensor 24 measures three frames, the motor is stopped and the rotation of the film winding shaft 16 is stopped.

During frame feeding, as shown in FIG. 9 (a4), the motor rotates forward in response to the release operation, the film F is taken onto the roll, and the measuring sensor 24 measures one frame. Motor is stopped.

When rewinding the film, the motor rotates forward once in response to the release operation, but the film F does not get damaged during feeding.
It is determined that the film is at the end, and the motor is rotated in reverse according to this determination result. As shown in FIG. 9(a5), the film rewinding shaft fitted to the shaft of the cartridge P is reversed (counterclockwise in the figure) to rewind the photographed film. When the rewinding of the film is completed, the motor stops, and the film rewinding shaft, which had been rotating due to the driving force ζ of the motor, also stops rotating (FIG. 9 (a6)).

In this example, the operation of rewinding the guide belt 1 to the standby position is performed in conjunction with the operation of opening the back cover 11. When the back cover 11 is opened, a clutch, which will be described later, is engaged, and with a slight delay, the motor is turned on. is reversed.

The guide belt winding shaft 4 and the rubber rollers 42' and 43', which are interlocked with the guide belt winding shaft 4 through a gear train, rotate in reverse (FIG. 9 (a7)). Rubber roller 42'.

43' pushes the free end of the guide belt 1, brings it into contact with the bent part of the guide rail 31 as clearly shown in FIG. Finally, the state shown in FIG. 9 (a7) is reached. Also at this time, the guide belt 1 is rewound by a certain amount. This is also due to the function of the clutch described below, that is, the function of the clutch which automatically disengages after a predetermined time (or rotates by a predetermined amount of rotation) after the clutch is engaged.

FIG. 10 shows a perspective view of a clutch 80 that operates for a predetermined time T in conjunction with the opening and closing operations of the back cover 11.

With reference also to FIG. 3, the manner in which the opening/closing operation of the back cover 11 is linked will also be explained. The state in FIG. 10 shows the result of changing from the open state of the back cover 11 in FIG. 3 to the closed state. That is, from the state shown in FIG. 3, the back cover locking member 27 is pushed on its side by the bin 81 provided on the camera body 10 and pulled in the direction of the arrow in the figure by the spring 82.
Movement limit IF portion 8 of L-shaped stopper 83 fixed to back cover 11
This is the state of the result of 1Δ guessing in 3a. At this time, the back cover lock pin 84 provided on the back cover locking member 27 engages with the back cover lock hook 28, and the back cover 11 is locked.

During the operation of closing the back cover 11, the tapered portion 30 of the back cover locking member 27 presses down the lower end of the clutch shaft 29 against the repulsive force of the spring 85. There is a step in the annular groove 88 formed at the E end of the clutch shaft.

A gear 89 provided at the tips of the two dogleg-shaped clutch levers 86 and 87, and a gear 90 provided on the guide belt winding shaft 4.
and are engaged.

The gear 89 receives driving force from a not-shown motor (the motor rotates after a while after the clutch is engaged by a separately provided switch means based on the operation of closing the back cover 11) via an appropriate gear train for deceleration. is transmitted and rotates. In this case, it rotates clockwise and rotates the gear 9°0 counterclockwise.

The gear 91, which is always engaged with the gear 90, is rotated clockwise. Since the gear 91 and the gear 92 are coaxially provided, the gear 92 is rotated clockwise.

A clutch lock release pin 93 is eccentrically fixed to the upper surface of this gear 92, and this pin 93 normally holds clutch levers 87, 86 which are narrowed around a pivot pin 96 by a spring 94. It works by sequentially pushing it apart and opening it. First, the upper clutch lever 87 is disengaged from the annular groove 88, and the clutch shaft 29 is lowered by the step difference. Next, when the lower clutch lever 86 is disengaged from the annular #88, the clutch shaft 29 falls down. At this time, the gear 92 stops rotating, and the lower clutch lever 86
88, while 1. The E-side clutch lever 87 is pressed against the circumferential surface of the clutch shaft 29 by a spring 93. When the clutch shaft 29 is pushed L again, the clutch lever 87 on the -E side first fits into the annular groove 88. The gear 92 is reversed and then the lower clutch lever 8
6 will fit into the annular ring s88. That is, the reason why the two clutch levers 86 and 87 are provided is so that when the clutch shaft 29 is pushed up next, one of the clutch levers will fit into the annular groove 88.

The gear 95 is a gear for the roller shaft 42 (also, since the rubber rollers 42' and 43' are in pressure contact with the roller shaft 43, it rotates as a result of the roller shaft 43), and is engaged with the gear 91. There is. When opening the back cover 11, an operating member 100 is operated, one end of which is fixed to the back cover locking member 27 and the other end of which extends to the outside of the camera through a hole made in the back cover 11. In response to this operation, the back cover locking member 27 in FIG. 10 moves in the direction of arrow B. Since the fixed support shaft 97 is loosely fitted into the elongated hole 98, the moment the lock member 27 separates from the sliding contact portion 83C of the stopper 83, the lock member 27 is centered around the support shaft 97 due to the tensile force of the spring 82. The end face 99 rides on the locking portion 83b of the stopper 83, and the locked state is maintained by the locking portion 83b.

At this time, the tapered portion 30 of the back cover locking member 27 pushes the clutch shaft 29, and the clutch 80 is engaged. The motor is driven with a slight delay after the clutch is released, but since the member or switch is configured in advance so that the motor rotates in reverse when the back cover is opened, the guide belt winding is performed in the opposite direction to that described above. The take shaft 4 rotates in reverse for a certain period of time T, and the roller shafts 42 and 43 rotate in reverse to send out the guide belt 1. Note that the certain time T is determined by presetting the reduction ratio of the gear train, the arrangement of the clutch lock release pin 93, and the like.

Next, a second specific example of the first embodiment will be shown.

Figures 11 and 12 are perspective views of the second specific example;
1 shows a case where the guide belt 1 is in a standby position, and FIG. 12 shows a case after the guide belt 1 is wound up. As is clear from the figure, this specific example is a type of camera in which a conventional method is applied to cartridge loading. 114 is a cartridge chamber having a semicircular cross section, 115 is a film rewind shaft, 116 is a film winder, an L lever, and 117 is a finder. In addition, the same reference numerals in FIGS. 3 and 4 indicate the same or equivalent parts.

It goes without saying that the back cover 11 is provided with a pressure plate having the same function as the pressure plate 19 in FIG. 3 and other necessary members.

Next, a second embodiment will be explained.

FIG. 13 is a perspective view of the main part of the second embodiment. 101 is a guide belt, 104 is a guide belt winding shaft, 105 is a film winding shaft equipped with an automatic film winding mechanism, 106
107 and 108 are shaft-shaped guide members that guide the guide belt 101 along the optical axis direction. However,
There is no particular need to provide the shaft-shaped guide members 107, 108,
In order to prevent the guide belt 101 from bending, rounded portions may be formed at both ends in the width direction of the camera body around the exposure frame.

In the second embodiment, a guide belt 101 whose other end is cut into a rectangular shape as shown in FIG. 14 is used. Then, one 17M1lo1a of the guide belt 101 is fixed to the guide belt winding shaft 104, and the other end, that is, the end 101b of the notch remaining portion 101C is fixed to the guide belt rewinding shaft 102. The retaining protrusion 106 that engages with the film perforation is similar to that in the first embodiment, but in this guide belt 101, it is provided only at approximately the midpoint in the length direction.

When the guide belt 101 is in the standby position shown in FIG.
When the cartridge P is loaded and the guide belt winding shaft 104 is driven to rotate clockwise in the figure, the guide belt 101 runs, the perforations of the leader part FL are caught by the engaging protrusions 106, and the leader part FL takes up the film. axis 1
05 direction and the tip of the leader part is the film winding shaft 105
When the film reaches , the leader portion FL is wound around the film winding shaft 105 by an automatic winding mechanism. During photographing, the state shown in FIG.
1C and 10IC remain below -F of the exposure frame 113,
Film F is above it and there is no problem with shooting. Notch remaining portion 10 IC of guide belt 101.

The notch between 101C is formed to create an exposure space for the film F. In order to return the guide belt 101 from the position shown in FIG. 15 to the standby position shown in FIG. 14, the guide belt rewinding shaft 102 is rotated in the direction of the minute meter in the figure to unwind the guide belt 101. In the first embodiment, when returning the guide bell +4, the guide belt winding shaft is reversed and the guide belt is fed while being pressed against the rubber roller, so the material, shape, etc. of the guide belt affect the stability of the return operation. The second embodiment has the advantage that the unwinding shaft 102 allows the rewinding operation to be stabilized and reliably fed regardless of the material of the guide belt. Furthermore, due to the stability of the return operation, the length of the belt can be made longer, which has the advantage of greatly increasing the feed amount of the fins and lumens.

Furthermore, the return roller 2.3, which was necessary in the first embodiment,
Also, the guide rail 31 becomes unnecessary, and the area around the exposure frame can be configured simply.

Concerning the specific example, it is sufficient to slightly modify and apply the first and second specific examples of the first embodiment in consideration of the above, so illustration thereof will be omitted.

Regarding the operation of the camera of the second embodiment, the ninth embodiment of the first embodiment
If we explain with reference to Fig. 16 which corresponds to Fig. 16, Fig. 16 (
al) shows the state in the standby position, and (a2) in the same figure shows the state in which the guide belt winding shaft 104 rotates in conjunction with the rotation of the motor, the guide belt 101 is spring-rolled, and the film leader section FL is fed. . The starting point of this operation is the engagement of the clutch based on the operation of closing the camera back, as in the first embodiment.

FIG. 3(a3) shows how the leader portion FL is wound around the rotating film take-up shaft 105. Same figure (a4)
(a5) is when rewinding the film,
(a6) shows the end of film rewinding. Same figure (
al) indicates the time to return to the guide belt winding, and in conjunction with the reverse rotation of the motor, the guide belt rewind shaft 102 unwinds the guide belt 101 in the direction of the arrow.

Figure 16 (bl)! -(b2) and (b4) are vertical cross-sectional views of the vicinity of the center of the exposure frame 113. Reference numeral 119 denotes a pressure plate, which has two relief grooves 133 formed therein to allow the retaining protrusion 106 to escape. In the standby position (bl), the guide belt 101 is on the film guide rail, and there is no retaining protrusion 106 in this position. In (b2), the engaging protrusion 106 of the guide belt 101 catches the film perforation rayon and sends part of the IJ-p FL. The next state in which the winding of the guide belt 101 is completed (b
4), the notch remaining portions 101c, 1 of the guide belt 101
Groove 14 formed on the outside of the film guide rail by 01c
0, while the film F is located between the pressure plate 119 on the film guide rail 150. This state (b4) continues throughout the shooting and film rewinding.

Note 1. In the first and second embodiments of L, the cartridge loading chamber is placed on the left side and the film winding chamber is placed on the right side with the exposure frame in the center, but this placement may be reversed left and right. .

In addition, in the first specific example above, a type of camera in which the cartridge loading chamber into which the Torone is dropped is formed on the camera body side is shown, but a type of camera is shown in which the cartridge loading chamber into which the Torone is dropped is formed on the camera back side. It may be disclosed in the invention related to No. 56-122239.In this case, the main extension means of the leader part is a thin rod-shaped member extending along the back cover.

As is clear from the explanation below, according to this invention,
One end of a flexible belt having a retaining protrusion that engages with the perforation is fixed to a belt winding shaft provided between an exposure frame and a film winding chamber, and the film leader section is overlapped with the flexible belt. Since the film leader section is fed through between the pressure plate and the exposure frame, the engaging protrusion allows the film to be fed by applying force in parallel to the direction in which the film leader section is fed, resulting in cuts in the perforations. In addition to making it possible to feed the film reliably without fear of causing damage, this also has the effect of eliminating the need for manual adjustment of the film leader section to the film winding chamber, regardless of the length of the drawer of the film leader section. ,moreover,
Since the film feeding means itself is thin, it can be placed overlapping the exposure frame and can be placed avoiding the focal plane shutter mechanism, thus making it possible to put into practical use an eye reflex camera with simple film loading.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the principle of the first embodiment of the present invention in a standby position, and FIG. 2 is a diagram showing the principle during photographing. FIG. 3 is a perspective view of the first specific example of the first embodiment, and FIG. 4 is a perspective view of the first specific example of the first embodiment.
A schematic perspective view of a specific example with the film guide plate removed, FIG. 5 is a front view of the area around the exposure frame, especially for explaining the guide rail, and FIG. 6 is a sectional view taken along the line , FIG. 7 is a cross-sectional view taken along the line II--■ of FIG. Explanatory diagram of camera operation, No. 10
The figure is a perspective view for explaining the clutch of the guide belt winding shaft, Figures 11 and 12 are perspective views showing the second specific example of the first embodiment, and Figure 11 is a standby position 1. In this case, FIG. 12 shows the state after the guide belt is wound up. FIG. 13 is a principle diagram of a second embodiment of the present invention, FIG. 14 is a schematic diagram of a guide belt used in the second embodiment, and FIG. 15 shows a state in which the camera of the second embodiment is photographing. 1st
FIG. 6 is an explanatory diagram for explaining the operation of the camera of the second embodiment. P...Patrone, F...35mm size film, FL...Film leader section, 1,101...Guide bell), 4,104...Guide belt/take-up shaft, 6
．． 106... Retaining protrusion or feed claw, 5,105...
・Film winding shaft, 13... Exposure frame, 14... (
Torone loading chamber, 42', 43'...Rubber roller, 3
1... Belt kite rail, 102... Guide belt rewinding shaft. Patent applicant: Fuji Photo Film Co., Ltd. Patent attorney: Aoyama Aoyama and two others Figure 2 Figure 3 Figure 4 Figure 10 Figure 11 Figure 12

Claims (1)

[Claims] In a camera that takes pictures by loading a cartridge containing H135 mm film, it is possible to provide a film winding shaft in a film winding chamber provided on the opposite side of the cartridge loading chamber with the exposure frame as the center. A flexible member take-up shaft is provided between the exposure frame and the film take-up shaft, and one end of the flexible member for guiding the film leader portion is fixed to the flexible member take-up shaft for winding the film. It has engaging protrusions arranged at regular intervals that can be engaged with perforations formed in the leader section, and the 2. From the position where the flexible member is pulled out beyond the exposure frame toward the cartridge loading chamber, by feeding the flexible member after loading the cartridge, a part of the film leader is pulled out and guided to the film winding shaft. A simple film loading camera characterized in that the film is wound around a flexible member winding shaft. +2) In a camera that loads a cartridge containing 35 mm film to take pictures, if the film winding shaft is installed in the film winding chamber, which is located on the opposite side of the cartridge loading chamber with the exposure frame at the center, the exposure frame A flexible member winding shaft for winding the film with one end of a flexible member for guiding the film leader portion fixedly fixed between the film winding shaft and the film winding shaft is provided, and the flexible member is formed on the film leader portion. The flexible member F is pulled out beyond the exposure frame toward the cartridge loading chamber before loading the cartridge. From the position where the cartridge is loaded, by feeding the combustible member, the film leader is pulled out and guided to the film take-up shaft so that the film is taken up on the flexible member take-up shaft;
Further, the flexible member is moved from the flexible member take-up shaft to −F.
A simple film loading camera characterized in that a means for returning the film to the take-out position CD is provided separately from the flexible member winding shaft. (3) The method for returning the drawer to the pulled out position is as described in 1. In conjunction with the reverse movement of the flexible member take-up shaft described in F, 1. 1. Pressing rollers that sandwich the flexible member oJ and send it toward the exposure frame L. The simple film loading camera according to claim 2, further comprising a belt guide rail provided at the L portion of the exposure frame. (4) The film simple loading camera according to claim (2), wherein the means for returning the film to the drawer attachment described in E is a flexible member rewinding shaft provided between the exposure frame and the cartridge loading chamber. .