JPH0862684A - Film feeding device for camera - Google Patents

Abstract

PURPOSE: To provide the inexpensive film feeding device of a camera constituted so that the damage of a film and the failure of the camera are prevented from occurring by outputting a signal showing such a state that the film is not perfectly fed out or taken up when it occurs. CONSTITUTION: This device is provided with a film winding-up mechanism having a fork 6 and a take-up spool 10 taking up the fed-out film 7 by unidirectional rotation, a planetary gear mechanism 130 switching the film 7 to a second state that it can be taken up from a first state that it can be fed out when the film 7 is wound round the spool 10 and a leaf switch 39 detecting the state of the gear mechanism 130.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention contains a camera, more specifically, the front end of an unexposed film, and feeds the unexposed film out of the film cartridge by rotating a supply spool in the film cartridge in one direction. The present invention relates to a film feeding device for a camera using a feed type film cartridge.

[0002]

2. Description of the Related Art The structure of the delivery type film cartridge has been proposed in US Pat. No. 4,832,275 and the like. By rotating a supply spool in the film cartridge in one direction, the unexposed film is removed. It can be sent out from a film cartridge and wound up by a take-up spool.

As a camera using the above-mentioned delivery type film cartridge, the camera disclosed in Japanese Patent Application Laid-Open No. 2-67534 is such that the film is automatically delivered when the film cartridge is loaded, and the film is passed through the aperture section. It is a camera that winds around a take-up spool and then winds up only with the film take-up spool.

In a camera of this type, for example, when the front end of the film falls into the aperture and is caught between the time when the film is fed from the film cartridge and the time when the film is wound around the film take-up spool.
If the film is continued to be sent out as it is, the film may be damaged and the camera may be damaged.

In view of this, the camera proposed in US Pat. No. 5,255,034 discloses that when the leading edge of the film does not pass through the aperture within a predetermined time from the start of film feeding,
The film is controlled so as to be rewound to prevent the above-mentioned failure.

[0006]

However, the above-mentioned USP
The camera of Japanese Patent No. 5255034 can detect the state when the leading end of the film is caught by the aperture, but an abnormality occurs just before the film further advances and winds on the film take-up spool, and the film take-up spool is detected. If it did not wrap around, there was a possibility that the abnormality could not be detected and a failure could occur.

[0007] In fact, abnormal warpage or deformation of the leading edge of the film can occur depending on the temperature and humidity conditions without causing defects in the manufacturing process, and even if such a film finishes passing through the aperture. Not winding on the take-up spool is a possibility.

Further, the camera disclosed in the above-mentioned US Pat. No. 5,255,034 requires a lever having a complicated shape as a mechanism for detecting the leading end of the film, and this lever is a member of high quality so as not to scratch the film. Something was required, and it was also a cost disadvantage.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to output a signal indicating the state when the film feeding and winding cannot be completed completely. Thus, it is an object of the present invention to provide a film feeding device for a camera, which can prevent the damage of the film and the breakdown of the camera and which is low in cost.

[0010]

SUMMARY OF THE INVENTION A film feeding device for a camera according to the present invention is a film feeding device for a camera in which a film patrone of a type in which the leading end of a film is stored is used. A film winding mechanism having a spool engagement member that engages with a supply spool shaft and sends out a film from a cartridge by rotating in one direction, and a film winding mechanism having a winding spool that winds up the film sent out by rotating in one direction. When the film is wound around the film, a switching mechanism that switches from a first state in which the film can be fed out to a second state in which the film can be wound, a detection unit that detects the state of the switching mechanism, and a film from the film cartridge. The switching mechanism is activated within a predetermined time after the start of feeding. When the first state does not switch to the second state, characterized by comprising a signal generating means for generating a decision signal.

In the film feeding device of this camera,
After starting feeding the film from the film patrone,
When the detection means detects that the switching mechanism does not switch from the first state to the second state within a predetermined time, the signal generation means outputs a determination signal.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1, 2 and 3 are perspective views showing respective operating states of the drive system of the film feeding apparatus for the camera of the first embodiment of the present invention. The film cartridge 5 applied to this camera is the same as the delivery type film cartridge proposed in US Pat. No. 4,832,275.

Prior to a detailed description of the film feeding device of the camera of this embodiment, the outline of the mechanism will be described. As shown in FIG. 1 and the like, this apparatus rotates the unexposed film 7 by unidirectional rotation of a fork 6 which is a spool engaging member which engages a supply spool 5a which is a supply spool shaft in the film cartridge 5. The leading end 7a is sent out from the inside of the film cartridge 5, and a film winding mechanism for winding the film 7 sent by one-direction rotation of the winding spool 10 for film winding, and the fork 6 is rotated in the other direction. Then, when the film 7 is wound around the take-up spool 10, a rewinding mechanism including a two-stage gear 38 for rewinding the film 7 into the film cartridge 5 and the like. A switching mechanism configured by a planetary gear mechanism 130 such as a planetary gear 35 for switching the driving state, The leaf switch 39, which is a detection unit that detects a change in the state of the frame, and the drive motor 21 that drives the fork 6 or the take-up spool 10 are provided. A signal generating device 40 which is a signal generating means for generating a determination signal when the state of the switching mechanism does not switch within a predetermined time after the start of sending, and a display device which displays a warning to the user by this determination signal, Further, when it is judged that the film feeding has failed based on the judgment signal of the signal generator 40, it is mainly constituted by a control circuit 41 for controlling the film 7 to be rewound into the film cartridge 5. There is.

The details of the film feeding device of the camera of this embodiment will be described below. FIG. 4 is a perspective view of the camera seen from the rear side, showing a state in which the rear lid 13 on the rear side is opened. As shown in FIG. 4, the camera body 1 is provided with a cartridge chamber 3 and a film winding chamber 4 on the left and right sides of the photographing opening 2 in between. When the film cartridge 5 represented by an imaginary line (two-dot chain line) is housed in the cartridge chamber 3, the unexposed film 7 is removed from the film cartridge 5 by rotating the supply spool 5a in the film cartridge 5 in one direction. It can be sent out to the film winding chamber 4 through the photographing opening 2.

The fork 6, which is a spool engaging member, is provided so as to project from the upper surface of the cartridge chamber 3 as shown in FIG. 4, and can be engaged with the supply spool 5a (see FIG. 1) provided in the film cartridge 5. And this fork 6
The film 7 is sent out by rotatively driving the film in one direction. Further, the film 7 can be rewound to the film cartridge 5 side by the other rotation.

Inner rails 8 arranged above and below the photographing opening 2 position the film 7 in the front-rear direction (optical axis direction). Further, outer rails 9 arranged on the upper and lower sides outside the photographing opening 2 position the film 7 in the vertical direction.

The take-up spool 10 arranged in the film take-up chamber 4 has been fed by the roller 11 and the roller 12 by a known method as disclosed in Japanese Patent Laid-Open No. 60-45231. The film front end portion 7a is configured to be automatically wound. A warning display LED 14 is provided above the rear portion of the camera body 1 to display a warning when the feeding operation of the film 7 is defective.

FIGS. 1, 2 and 3 are perspective views showing the drive system of the film feeding apparatus of this embodiment. FIG. 1 shows a state in which the film is being fed out, and FIG. 2 shows the film on the take-up spool. FIG. 3 shows a state in which the film is wound and wound up, and FIG. 3 shows a state in which the film is rewound.

The drive system of the film feeding apparatus of this embodiment is
A part of the drive system of the film feeding device disclosed in Japanese Patent Laid-Open No. 2-67534 has the same configuration, and the rotational force of the pinion 22 fixed to the output shaft 21a of the film driving motor 21 is During film winding, the film is transmitted to the take-up spool 10 via the one-way clutch 23 via the two-stage gear 25 and the take-up gear 24.

Further, the pinion 2 of the drive motor 21
The rotational force of 2 is the 2nd gear 2 when the film is fed.
9, a sun gear 26 supported by a shaft 26a via a gear 28, and a planetary gear 30 supported by a planetary lever 27.
And is transmitted to the intermediate gear 36. The rotational force of the intermediate gear 36 is transmitted from the planet gear 35 and the sun gear 32 to the fork 6. Further, when the film is rewound, the planetary lever 27 is in a position rotated clockwise as shown in FIG. 3, the rotational force of the sun gear 26 and the planetary gear 30 is transmitted to the gear 37, and the two-stage gear 38, The rewinding gear 31 is transmitted to the fork 6.

Further, the structure of each constituent member of the film feeding device will be described in detail. As shown in FIG. 1 and the like, the rewinding gear 31 is fixedly mounted on the upper portion of the fork 6. Further, the sun gear 32 is coaxially fixed to the upper portion of the sun gear 32 via a shaft 33.

The planetary gear 35 constituting the planetary gear mechanism 130 is rotatably supported on one end of a planetary lever 34 which is rotatably supported on a shaft 33. The planet lever 34 is urged in the clockwise direction by a spring 39 which is an urging means hung on a spring hook 1a on the camera body 1 at one end thereof. Further, the frictional force between the planetary lever 34 and the planetary gear 35 causes the planetary lever 34 to rotate counterclockwise against the spring 39 when the sun gear 32 is driven counterclockwise. It is set.

On the other hand, the intermediate gear 36 is rotatably arranged at a position where it can be engaged with and disengaged from both the planetary gear 30 and the planetary gear 35. The gear 37 is the sun gear 26.
Is rotatably disposed at a position where it is connected to the sun gear 26 via a planetary gear 30 as shown in FIG. The two-stage gear 38 is rotatably arranged at a position where the rewinding gear 31 and the gear 37 are connected to each other.

In the apparatus of this embodiment, a leaf switch 39 as a detecting means is provided for detecting the operating state of the planetary gear mechanism 130 which is the switching mechanism, that is, for detecting the rotational position of the planetary lever 34. The leaf switch 39 includes a flat elastically deformable metal contact piece 39.
The metal contact piece 39b having a bent end and a is held in an insulated state by an insulator 39c.

The turning position 3 of the planetary lever 34 when the planetary gear mechanism 130 is in the first state (see FIG. 1).
4A is rotated counterclockwise, and as shown in FIG.
When it is located at the rotation position 34B in this state, the metal contact piece 39a is pressed and elastically deformed by the projection 34a on the planetary lever 34, and the leaf switch 39 is brought into a conducting state, that is, turned on. It is configured.

The relationship of the drive gear reduction ratios in the drive system of the film feeding apparatus will be described. The gear train deceleration as a film winding drive system including the pinion 22, the two-stage gear 25 and the winding gear 24 is described below. The ratio is I ₁ , and the pinion 22, the two-step gear 29, the gear 28, the sun gear 26, the planet gear 30, the intermediate gear 36, and the planet gear 3 are used.
5 and the sun gear 32, the reduction ratio of the gear train as a film feeding drive system is I _2, and the pinion 22, the _two- stage gear 29, the gear 28, the sun gear 26, the planetary gear 30, the gears 37, 2 When the reduction ratio of the gear train as the film rewinding drive system constituted by the stepped gear 38 and the rewinding gear 31 is I ₃ , I ₁ <I ₂ and further I ₁ <I ₃ is satisfied. The gear train is set to.

When the signal generator 40 is connected to the terminals of the leaf switch 39 and the leaf switch 39 does not switch from off to on within a predetermined time after the start of feeding the film 7. And is configured to generate a determination signal.

The control circuit 41 also includes a signal generator 40.
When the determination signal is generated from the signal generator 40, the warning display LED 14 shown in FIG.
Is turned on, and the film rewinding operation is started.

The operation of this embodiment configured as described above will be described below. First, the film cartridge 5 is loaded into the cartridge chamber 3, but at this time, the film 7 is completely stored in the film cartridge 5. Next, when the rear cover 13 is closed, a rear cover switch (not shown) is turned on, the film drive motor 21 is energized by the output signal of this switch, and the film drive motor 21 rotates counterclockwise in FIG. Since the sun gear 26 also rotates counterclockwise by the rotation, the planet gear 30 revolves around the sun gear 26 counterclockwise, and the planet lever 27 rotates counterclockwise, as shown in FIG. The planetary gear 30 and the intermediate gear 36
Mesh with each other.

At this time, the planet lever 34 is biased clockwise by the spring 39, is in the rotating position 34A, and is in the first state as the planet gear mechanism 130.
The planetary gear 35 meshes with the intermediate gear 36. Therefore,
The rotation of the sun gear 26 is transmitted, the sun gear 32 rotates counterclockwise, and the fork 6 rotates counterclockwise.
Since the fork 6 is engaged with the supply spool 5a in the film cartridge 5, the supply spool 5a is rotated counterclockwise to feed the film 7.

In this way, the feeding operation of the film 7 proceeds, and the film front end portion 7a becomes the take-up spool 1.
Reach 0. The take-up gear 24 includes the pinions 22, 2
It constitutes a film winding gear train driven by the step gear 25, and rotates in the counterclockwise direction. Then, the one-way clutch 23 transmits the counterclockwise driving force to the take-up spool 10.

As described above, the gear reduction ratio is I
_{Since 1} <I ₂ , the film 7 reaching the take-up spool 10 is wound around the take-up spool 10,
Further, the rotation force of the take-up spool 10 causes the cartridge 5 to rotate.
It comes to be driven from the.

From the moment when the film 7 is wound up by the take-up spool 10, the sun gear 32 receives the counterclockwise driving force of the film 7, so that the planetary lever 34 resists the urging force of the spring 39. Then, it rotates counterclockwise and moves from the rotation position 34A in FIG. 1 to the rotation position 34B shown in FIG. 2, and the planetary gear mechanism 130 is held in the second state. By moving the planetary lever 34 to the rotation position 34B, the flat contact piece 39a of the leaf switch 39 is pressed by the projection 34a of the planetary lever 34 as shown in FIG. And output an ON signal. After that, the film 7 is wound up by the rotational force of only the take-up spool 10.

Thereafter, when the filming of all the frames of the film 7 is completed, or a rewinding instruction signal for starting film rewinding is generated by a known means (not shown) at the time when the frames up to the middle are photographed, this signal causes The film drive motor 21 rotates in the opposite direction to the winding, that is, in the clockwise direction in FIG. Due to the rotation of the drive motor, the sun gear 26 also rotates clockwise, and the planetary gear 30 moves to the sun gear 2.
It revolves around 6 in the clockwise direction and the driving state shown in FIG. 3 is obtained. In this state, the pinion 22 constituting the gear train, and hereinafter, the respective gears 29, 28, 26, 30, 37, 38, 31
, The rewinding gear 31 rotates clockwise, and the fork 6 integrated with the rewinding gear 31 also rotates clockwise. Therefore, the supply spool 5 engaged with the fork 6
3a also rotates clockwise in FIG. 3 to rewind the film 7.

When the film driving motor 21 rotates clockwise, the winding gear 24 also rotates clockwise, but the gear reduction ratio is I ₁ <I as described above.
Because it is _3, the direction of the angular velocity take-up spool 10 is driven through the winding gear 24 than the angular velocity driven by the film 7 is increased, the one-way clutch 23, a state that does not transmit the driving force, i.e. , The overrun state, and the gear 2 which is the winding gear train.
The film 7 is rewound without interfering with the rotation of the films 4 and 25.

When the film 7 is wound around the take-up spool 10 in the normal operation, that is, in the film 7 feeding process, the above-mentioned operation is performed, but in the abnormal operation, that is, the film 7 is feeding process. If the take-up spool 10 is not wound with the planetary gear mechanism 13
0 holds the state of the first state of FIG. 1, and the planet lever 34
Since the rotation position 34A remains unchanged, the leaf switch 39 does not turn on even after a lapse of time.

Therefore, in the apparatus of this embodiment, the leaf switch 39 does not turn on as described above even if a predetermined time (timer setting time T1 in FIG. 5) has elapsed since the film feeding was started. If the signal generator 40
Determines that a defective feeding operation has occurred, and outputs a determination signal to the control circuit 41. The control circuit 41 displays a warning display L
A warning is displayed on the ED 14 and the drive motor 21 is rotated clockwise to rewind the film.

Next, the film loading process in the film feeding apparatus of this embodiment described above will be explained based on the flowchart of FIG. By loading the film, the feeding of the film 7 starts (step S101), and at the same time, the signal generator 40 starts measuring the time T (step S102). When the preset predetermined time T1 is reached (step S103), the state of the leaf switch 39 is checked (step S104). If the leaf switch 39 is turned on, the normal operation after film winding as described above is continued (step S10).
5).

On the other hand, if the leaf switch 39 remains off even after the predetermined time T1 has been reached, the signal generator 40 determines that a problem has occurred in the feeding or winding of the film. Then, the determination signal is output to the control circuit 41 (step S106). Control circuit 41
Turns on the warning display LED 14 as described above (step S107), and further instructs the start of the film rewinding operation (step S108).

As described above, the film feeding apparatus for the camera of this embodiment is not limited to the case where the leading end 7a of the film 7 is caught in the photographing opening 2 in the film feeding process after the film is loaded, and the leading end 7a is not limited to this. When the film cannot be wound up because the winding spool 10 has not been completely wound due to the curling tendency of the film, etc., the determination signal is output because the ON signal of the leaf switch 39 is not detected within the predetermined time. Then, a warning is displayed and rewinding is started. Therefore, not only the photographing opening 2 (aperture portion), but also a defect that occurs after passing through the aperture portion can be appropriately dealt with, the film can be prevented from being damaged, and the camera failure can be prevented. Further, the components such as the switching mechanism and the like have an extremely simple structure, which is advantageous in terms of cost.

Next, regarding the film feeding device of the camera of the second embodiment of the present invention, a perspective view of the drive system of the film feeding device of FIG. 6, and a cross section showing the operating state around the switching gear of FIGS. It will be described with reference to the drawings. The structure of the camera other than the film feeding device in this embodiment is the same as that of the first embodiment. Also in the drive system of the film feeding apparatus, the film drive motor 21, the output shaft 21a, the pinion 22, the winding spool 10, the roller 11, the roller 12, the one-way clutch 23, the winding gear 24, the two-stage gear 25, Sun gear 26, shaft 26
The components of the drive system such as a, the planetary lever 27, the gear 28, the two-stage gear 29, and the planetary gear 30 are substantially the same as those in the first embodiment. However, the gear 37 in the first embodiment,
Instead of the two-step gear 38, a two-step gear 53 and a gear 54 are provided.

As a structure of the film feeding apparatus of this embodiment different from that of the first embodiment, a rewinding gear 31 is provided above the fork 6 of the spool coupling member as shown in FIGS. Along with being fixed, a left-hand male screw 51 as a first member of the switching mechanism is coaxially provided on the fixed shaft 6a. A flange portion 51b is provided on the upper portion of the male screw 51, and a step portion 51a is provided on the lower portion. A switching gear 52 as a second member of the switching mechanism is attached to the male screw 51 by being screwed with a female screw portion of the left screw on the inner periphery thereof. The thrust direction of the switching gear 52 is
The lower portion is positioned by a step portion 51a which is integral with the male screw 51, and the upper flange portion 51b of the male screw 51 acts as an upper stopper.

With the rotation of the male screw 51, the switching gear 52 moves in the axial direction, and the fork 6 and the planet gear 3 are moved.
Depending on the relative relationship with 0, the step portion 51a and the collar portion 51
Move up and down between b. Switching gear 52 in the range of movement
The outer peripheral gear portion is a meshable area with the planetary gear 30.

The leaf switch 39, which is the detecting means, has the same structure as that of the first embodiment except that the leaf switch 39 is off when the switching gear 52 is downward, and is upward when it is upward. Are arranged to be turned on. Although not shown in FIG. 6, a signal generator 40 is connected to the leaf switch 39 as in the first embodiment, and a control circuit 41 is connected to the signal generator 40.

In the two-stage gear 53, the sun gear 26 is shown in FIG.
When the planetary gear 30 revolves clockwise around the sun gear 26 from the state shown in FIG.
It is rotatably arranged at a position where it meshes with zero. Also,
The gear 54 is rotatably arranged at a position where the rewinding gear 31 and the two-stage gear 53 are connected to each other.

In the drive system of the film feeding apparatus of the present embodiment having the above structure, the pinion 22 and the two-stage gear 25
And the reduction gear ratio of the take-up drive system gear train constituted by the take-up gear 24 is I _1, and is constituted by the pinion 22, the two-stage gear 29, the gear 28, the sun gear 26, the planetary gear 30, and the switching gear 52. The reduction ratio of the feed drive system gear train is set to I _2, and the pinion 22 and the two-stage gear 2
9, the gear ratio of the rewinding drive system gear train composed of the gear 28, the sun gear 26, the planetary gear 30, the two-stage gear 53, the gear 54 and the rewinding gear 31 is I ₃ , and I ₁ <I ₂ It is set so that I ₁ <I ₃ holds.

The operation of the film feeding apparatus of this embodiment having the above structure will be described below. Also in the above film feeding device, the film 7 sent out from the cartridge 5 is wound around the take-up spool 10, and the rotational force of the take-up spool 10 starts the take-up of the film 7. The operation up to the start moment is the same as in the case of the first embodiment.

After the start of the winding, the angular speed of the male screw 51 driven by the fork 6 driven by the film 7 is faster than the angular speed of the switching gear 52 driven by the planetary gear 30, and the switching is performed. Gear 52
Rises from the moving position 52A corresponding to the first state shown in FIG. 7, and moves to the moving position 52A corresponding to the second state shown in FIG.
Move to B. Due to this transition, the contact piece of the leaf switch 39 is pressed by the upper surface 52a of the switching gear 52 and changes from off to on.

After the start of winding, the film 7 is wound up only by the winding spool 10, and the peripheral speed of the switching gear 52 is faster than the peripheral speed of the planetary gear 30, so that the switching gear 52 is rotated. Tooth tip is planetary gear 30
By repeating the repulsion of the tooth tip of the above, the switching gear 52 is not driven by the planetary gear 30. The film rewinding operation is the same as the operation in the first embodiment.

In the film feeding apparatus of this embodiment, the film 7 is put on the take-up spool during the film feeding process.
In the case of an abnormal operation in which the coil does not wrap around, the leaf switch 39 does not output an ON signal for a predetermined time, as in the first embodiment. In that case, the signal generator 40 sends a determination signal to the control circuit 41. The warning is displayed and the film is rewound at the same time.

The film feeding device for the camera of this embodiment has the same effect as that of the device of the first embodiment. Particularly, in the case of this embodiment, the switching gear 52 is used as a mechanism for switching between the film feeding and the winding state. It suffices to provide only the male screw 51 and the male screw 51, and the configuration of the device can be simplified.

Next, regarding the film feeding device of the camera of the third embodiment of the present invention, a perspective view of the drive system of the film feeding device of FIG. 9 and the one-way clutch as the switching means of FIGS. This will be described with reference to sectional views showing the operating state. In the device of this embodiment, the switching mechanism composed of the male screw 51 and the switching gear 52 in the device of the second embodiment is, as shown in FIG. 9, a one-way clutch 61 which is a one-way rotating clutch mechanism, and The gear 62 is replaced, and the constituent members different from those in the second embodiment will be described below.

The one-way clutch 61 is shown in FIG.
As shown in FIG. 11, a core 61a as a second member fixed to the gear 62 side, a case 61b as a first member fixed to the rewinding gear 31 side, a ball 61c and a spring 61d are included. The core 61a, the case 61b, and the ball 61c are each formed of a conductor such as metal, and the spring 61d is formed of a spring member formed of an electrical insulator such as plastic, sponge, or rubber, or an elastic member. Has been done. In addition, the core 61a
The shaft 62a to which is fixed is similarly made of a conductor.

The switch 63 as the detecting means is the shaft 6 described above.
The brush 63 of the switch is provided on the outer periphery of the case 2a and the case 61b
It is arranged with a and 63b in contact with each other. Each of the brushes 63a and 63b is made of a conductor such as metal, and is joined and held by an insulator 63c.

The film loading operation of the film feeding apparatus of the present embodiment constructed as above will be described below. The film 7 sent out from the cartridge 5 is wound on the take-up spool 10, and the operation up to the moment when the take-up spool 10 starts the winding drive is the same as in the first and second embodiments. It should be noted that the one-way clutch 61 is in the engaged state during the feeding operation of the film 7, and as shown in the operation state diagram of FIG.
The ball 61c is sandwiched between the core 61a and the core 61a. Therefore, the brushes 63a, 63 of the switch 63
It is in a conductive state, that is, in an on state during b.

After the start of the winding drive, in the one-way clutch 61, the rotation speed of the case 61b is faster than that of the core 61a, and as shown in the operation diagram of FIG. 11, the ball 61c is either the core 61a or the case 61b. It is in contact with only one of them and is separated from the other. Therefore, the switch 63 shifts from on to off. The film rewinding operation is the same as in the first and second embodiments.

In the abnormal operating state where the film 7 is not wound around the take-up spool 10 during the feeding process, the switch 63 does not change to the off state even after a predetermined time elapses. Outputs a determination signal to the control circuit 41. In the case of the first embodiment, the determination signal is issued when the leaf switch 39 does not change from OFF to ON within a predetermined time, whereas in the present embodiment, the switch 63 turns ON within a predetermined time. When it does not change from OFF to OFF, it is judged that the feeding or winding is abnormal, and a judgment signal is issued.

In the film feeding apparatus of this embodiment, since the one-way clutch 61 is applied as the switching mechanism, the space for disposing the switching mechanism can be reduced,
The feeding device can be compactly integrated, and the camera can be downsized.

Next, a film feeding device for a camera according to a fourth embodiment of the present invention will be described with reference to the perspective views and operation diagrams of the drive system of the film feeding device shown in FIGS.
The film feeding apparatus of the present embodiment has a one-way clutch 61 as a switching mechanism in the apparatus of the third embodiment.
Is unnecessary, and the photo interrupter 71 is applied instead of the switch 63 as the detection means.

FIG. 12 shows the state in which the film is being fed out, FIG. 14 shows the state in which the film is wound around the film take-up spool, and FIG. 16 shows the drive system in the state in which the film is rewound. It is a perspective view. 13, 15, and 17 are diagrams showing the operating state of the relationship between the planetary gear mechanism 140 applied as a switching mechanism and the photo interrupter 71, and correspond to FIGS. 12, 14, and 16, respectively. .

In the film feeding apparatus of this embodiment,
The gear 62 and the rewinding gear 31 have a structure in which they are fixed to each other via a shaft. Further, the planetary lever 77 of the planetary gear mechanism 140 as a switching mechanism has an L shape,
The slit 77a is provided at one end thereof. The photo interrupter 71 is arranged so as to sandwich the slit 77a.
Is provided.

In the first state where the planetary gear 30 and the gear 62 are properly meshed as shown in FIG. 12, the planetary lever 77 is used.
Is in the turning position 77A, and the photo interrupter 71 is
It faces the portion other than the slit 77a. Also, FIG.
As shown in 4, the planetary gear 30 and the gear 62 are not in mesh with each other,
In the second state in which the tooth tips are reciprocated with each other, the planet lever 77 is in the rotation position 77B, and the photo interrupter 7
1 is disposed so that the slit 77a can be detected.

The operation of the film feeding apparatus of the present embodiment constructed as above will be described below. The film 7 delivered from the cartridge 5 is wound on the take-up spool 10 and the operation up to the moment when the take-up spool 10 starts the winding drive is the same as that of the first embodiment. Until the start of driving, the film feeding apparatus is in the state shown in FIGS.

After the start of the winding drive, the planetary gear 30
The peripheral speed of the gear 62 becomes faster than the peripheral speed of, and the planetary gear 30 is in a state where it cannot normally mesh with the gear 62 and is in a state of being repelled. But the sun gear 2
6 rotates counterclockwise in FIG. 12, and the planetary lever 77 constantly tries to rotate counterclockwise. Therefore, as shown in FIGS.
In addition, once it is repelled, it immediately returns,
Repeatedly being fluttered immediately. Then, the photo interrupter 71 repeats the detection state and the non-detection state of the slit 77a. The film rewinding operation is the same as in the case of the first embodiment, and its operation state is shown in FIGS.

In the case of the present embodiment, the processing state of the abnormal operation when the film 7 is not wound around the take-up spool 10 in the feeding process is the same as in the case of the first embodiment. However, in the first embodiment, the film winding failure is detected when the switch 39 does not change from OFF to ON within a predetermined time, and the determination signal is output. However, in the case of the present embodiment, the film is not wound within the predetermined time. When the photo interrupter 71 does not detect the slit 27a, it operates so as to output the above-mentioned determination signal.

As described above, the film feeding device for the camera of this embodiment is provided with the planetary gear mechanism 1 which is a switching mechanism.
Since the operation state of 40 is detected by the photo interrupter 71 of the detecting means, it is sent out or
Detection of abnormal winding is reliably performed.
Further, it is not necessary to apply a switching mechanism such as a one-way clutch, and the drive system can be simplified.

(Supplementary Note) Based on the embodiment described above, a film feeding device having the following configuration can be proposed. (1) In a film feeding device of a camera that loads and uses a film cartridge in which the leading end of the film is stored, a spool member that engages with a supply spool shaft in the film cartridge and feeds the film from the cartridge by rotating in one direction. A film winding mechanism having a combination member and a take-up spool that winds the delivered film by unidirectional rotation; a drive motor that drives the spool engagement member via a connected drive gear; After the film is wound around the take-up spool, a switching mechanism that switches from the first state to the second state, a detection unit that detects the state of the switching mechanism, and after starting the feeding of the film from the film cartridge, The switching mechanism switches from the first state to the second state within a predetermined time. When no al, and signal generating means for generating a decision signal, feeding a camera film feed of which is characterized by comprising apparatus. The film feeding device of the camera can prevent the film from being damaged and the camera from being broken by outputting a determination signal indicating the state in which the film cannot be fed out and wound up completely. In addition, it is possible to provide a low-cost device.

(2) In Supplementary Note (1), the switching mechanism includes a sun gear that rotates in association with the spool engaging member, and a planetary gear that can be engaged with and disengaged from the drive gear about the sun gear. And a biasing unit that biases the planetary gear in a direction in which the planetary gear meshes with the drive gear, and the detecting unit detects a position change in the revolution direction of the planetary gear. apparatus. Since the switching mechanism is composed of the planetary gear mechanism and the position of the planetary gear is detected by the detecting means to output the discrimination signal, the device can be made compact and reliable detection is possible. .

(3) In appendix (1), the switching mechanism is a first rotating member which is interlocked with the spool engaging member and rotates.
And a second member that is coaxially engaged with the first member and that moves in the thrust direction while rotating in conjunction with the drive mechanism. The detecting means includes thrust of the second member. A film feeding device for a camera, which is capable of detecting a positional change in a direction. The film feeding device of the camera is
Since the disposing space of the switching mechanism is small, a reliable discrimination signal can be obtained.

(4) In Supplementary Note (1), the switching mechanism is a first rotating member which is interlocked with the spool engaging member and rotates.
A member and a second member that rotates in conjunction with the drive mechanism, wherein the first member and the second member constitute a one-way rotation clutch mechanism, and the detection means is one of the one-way rotation clutch mechanism. A film feeding device for a camera, which detects a change in state. The film feeding device of the camera is
Since the one-way rotating clutch mechanism is applied as the switching mechanism, the occupied space can be reduced,
Moreover, the switching operation can be performed smoothly.

[0071]

As described above, the film feeding apparatus for a camera of the present invention has the following effects. That is, a judgment signal is output when the switching mechanism does not switch within a predetermined time after starting to feed the unexposed film from the film cartridge, that is, when the film does not wind on the take-up spool within the predetermined time. Therefore, it is possible to display a warning and start rewinding, correct the problem that occurred after passing through the aperture part, save the film from damage, and prevent the camera from malfunctioning. You can Further, as the switching mechanism, a planetary gear mechanism, a biasing means, a screw mechanism, a one-way clutch mechanism, or the like can be applied, and an inexpensive camera can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing a feeding operation state of a drive system of a film feeding device for a camera according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a winding operation state of a drive system of the film feeding device of the camera shown in FIG.

3 is a perspective view showing a rewinding operation state of a drive system of the film feeding device of the camera shown in FIG.

FIG. 4 is a perspective view of the camera of FIG. 1 seen from the rear side, showing a state in which a rear lid is opened.

5 is a flowchart of a film loading process in the film feeding device of the camera shown in FIG.

FIG. 6 is a perspective view of a drive system of a fill feeding device for a camera according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view showing an operating state when the film is fed out around the switching gear in the film feeding device of the camera of FIG. 6;

8 is a cross-sectional view showing an operating state at the time of winding a film around a switching gear in the film feeding device of the camera shown in FIG.

FIG. 9 is a perspective view of a drive system of a fill feeding device for a camera according to a third embodiment of the present invention.

FIG. 10 is a view showing an operating state of the one-way clutch during film feeding out in the film feeding apparatus for the camera shown in FIG. 9;

FIG. 11 is a view showing a working state of the one-way clutch during film winding in the film feeding device of the camera shown in FIG. 9;

FIG. 12 is a perspective view showing a film feeding operation state of a drive system of a fill feeding device for a camera according to a third embodiment of the present invention.

13 is an operation diagram of the planetary gear mechanism of the film feeding device of the camera of FIG. 12 in a film feeding operation state.

FIG. 14 is a perspective view of the drive system of the film feeding device of the camera of FIG. 12 in a film winding operation state.

15 is an operation diagram of the planetary gear mechanism of the film feeding device of the camera of FIG. 12 in a film winding operation state.

16 is a perspective view of the drive system of the film feeding device of the camera of FIG. 12 in a film rewinding operation state.

FIG. 17 is an operation diagram of the planetary gear mechanism of the film feeding device of the camera of FIG. 12 in a film rewinding operation state.

[Explanation of symbols]

5 Film patrone 5a Supply spool (supply spool shaft, film winding mechanism) 6 Fork (spool engaging member) Film 7a Film tip 10 ... ………… Take-up spool (film winding mechanism) 14 ………… Warning display LED (warning display means) 21 ………… Drive motor 24 ………… Take-up gear (film winding mechanism) 31 ………… Rewinding gear (film rewinding mechanism) 34 ………… Planetary lever (switching mechanism) 34A ……… Planetary lever rotating position (first state) 34B ……… Planetary lever rotating position (second state) 35: Planetary gear (switching mechanism) 39: Leaf switch (detecting means) 51: Male screw (switching mechanism) 52: Switching gear (switching) Mechanism) 52A ......... Switching gear moving position (first state) 52B ......... Switching gear moving position (second state) 61 ………… One-way clutch (switching mechanism) 63 ………… Switch (detecting means) ) 77 ... Photointerrupter (detection means) 130, 140 ... Planetary gear mechanism (switching mechanism) T ₁ ............ Predetermined time

Claims (3)

[Claims] 1. A film feeding device for a camera, wherein a film patrone of the type in which the leading end of the film is stored is used. A film winding mechanism having a spool engagement member and a take-up spool for taking up the sent-out film by unidirectional rotation, and a first state in which the film can be sent out by winding the film around the take-up spool. A switching mechanism for switching from the state to the second state in which the film can be taken up, a detection means for detecting the state of the switching mechanism, and the switching mechanism within a predetermined time after starting the feeding of the film from the film cartridge. When the first state does not switch to the second state, A film feeding device for a camera, comprising: a signal generating means for generating a constant signal. 2. The film feeding apparatus for a camera according to claim 1, further comprising warning display means for displaying a warning when the determination signal is generated from the signal generator. 3. A drive motor for driving the spool engaging member, and the spool engaging member is rotated in the other direction when the determination signal is generated from the signal generating device to rotate the film to the film. The film feeding device for a camera according to claim 1, further comprising: a film rewinding mechanism for rewinding the film in the cartridge.