Abstract:
A camera has at least one motor, a spindle gear (i.e. a gear having a spindle) for rewinding and thrusting a film, a cam that rotates together with the spindle gear when the spindle gear is rotated in a film-rewinding direction and that remains at rest when the spindle gear is rotated in a film-thrusting direction, a direction-limiting mechanism for permitting the spindle gear to rotate in the film-rewinding direction only when the motor is rotating in a forward direction, and a transmission mechanism that comes into contact with the cam when the motor is rotating in a reverse direction and that, when the cam is in one of predetermined rotation positions, engages with and thereby transmits a driving force of the motor to a corresponding one of driven members provided one for each of the predetermined rotation positions. In this camera, paths for transmitting the driving force of the motor are switched by first rotating the spindle gear in the film-rewinding direction to bring the cam into one of the predetermined rotation positions and then reversing a rotation direction of the motor.

Description:
This application is based on application No. H09-270055 filed in Japan, the content of which is hereby incorporated by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a camera supporting the advanced photo system, and more particularly, to a camera being small in size and having minimum functions necessary for the new photographic system. 
     2. Description of the Prior Art 
     In recent years, a new photographic system called advanced photo system (hereinafter, referred to as new system) has been introduced, and cameras and films supporting this system have been commercialized. This system has been spreading because it is superior to the conventional system using the 135 film in camera size reduction and convenience in photographing. 
     First, a film supporting the new system will briefly be described. FIGS. 1 and 2 are perspective views of a film cartridge for the new system (hereinafter, referred to as cartridge  1 ) viewed from above and below, respectively. A film  10  is housed being wound around a rotatable spool  3  in the cartridge  1  and the spool  3  can receive rotation from a driving system of the camera by a subsequently-described spindle key being engaged in a key groove  3   a  formed in the spool  3 . A light lock door  6  is provided at a film outlet  5 . A subsequently-described opening and closing key of a predetermined configuration is inserted into a key hole  4  having a locking portion  4   a  and a rotary portion  4   b , and is rotated in the key hole  4 , so that the light lock door  6  is opened. This enables the film  10  to be sent out. 
     On the side of the upper surface  1   a  of the cartridge  1 , a data disk  2  rotatable integrally with the spool  3  is fixed. On the data disk  2 , film information such as the number of exposures and the ISO speed of the film is recorded by means of a bar code  2   a . The film information can be read out by an optical sensor provided in the camera. At the lower surface  1   b  of the cartridge  1 , marks  7  (“unused”  7   a , “exposed partway”  7   b , “fully exposed”  7   c  and “developed”  7   d ) representing the film use condition are provided. The film use condition is indicated by one of the marks  7  being displayed in white according to the stop position of a white indicator  8  rotatable integrally with the spool  3  (in FIG. 2, the film use condition is “unused”  7   a ). 
     Since the relative positions of the indicator  8 , the bar code  2   a  and the key groove  3   a  are fixed, the position of the indicator  8  can be recognized by the optical sensor for reading out the bar code  2   a  or a mechanism for detecting the position of the subsequently-described spindle key rotatable integrally with the key groove  3   a . The operation of stopping the indicator  8  at one of the positions of the “unused”  7   a , the “exposed partway”  7   b , the “fully exposed”  7   c  and the “developed”  7   d  will be called VEI setting (VEI is an abbreviation of “visual exposure information”). 
     In a typical camera supporting the new system, as shown in FIG. 3, a cartridge chamber  21  where the cartridge  1  is loaded is disposed on one side of a camera  20 , and a cartridge chamber lid  22  for insertion of the cartridge  1  is provided at an end of the cartridge chamber  21 . On the other side of the camera  20 , a winding spool  26  for winding the film  10  therearound is disposed. 
     When the cartridge  1  is loaded into the cartridge chamber  21 , the light lock door  6  of the cartridge  1  is opened, the film use condition is determined based on the position of the data disk  2 , and the film information is read out from the bar code  2   a  formed on the data disk  2 . When the film use condition is “unused”, an operation to transport the film  10  to the first frame is necessary. When the film use condition is “exposed partway”, an operation to wind the film  10  being exposed partway around the winding spool  26  is necessary. When the cartridge  1  is taken out, an operation to record the film use condition on the film cartridge  1  according to the position of the indicator  8  and close the light lock door  6  is necessary. Since these operations are complicated, automatic control by motor driving is indispensable. At present, winding and rewinding the film  10  by motor driving is a function provided in most cameras. In addition to this function, cameras are desired to have a function to automatically perform an operation to lock and a unlock the cartridge chamber lid  22  in order to prevent the film  10  from being damaged by the user inadvertently opening the cartridge chamber lid  22  during photographing. 
     An example of operations necessary for the motor driving and other operations will be described on the time series by use of a brief flowchart shown in FIG.  4 . In the figure, the operations enclosed by broken lines are manually performed by the user According to the flowchart, first, the cartridge  1  is loaded into the cartridge chamber  21  and the cartridge chamber lid  22  is closed (operation number  201 ). Then, the cartridge chamber lid  22  is automatically locked ( 202 ) and the light lock door  6  is opened ( 203 ). Then, the spool  3  is rotated in the rewinding direction, and the position of the data disk  2  and the data on the data disk  2  are read out ( 204 ,  205 ). When the film use condition is “fully exposed” or “developed”, the operation shifts to the subsequently-described VEI setting. When the film use condition is “unused” or “exposed partway”, the film  10  is sent out ( 206 , hereinafter, this operation will be referred to as thrust driving), it is detected that the tip of the film  10  is caught by the winding spool  26  ( 207 ), the film  10  is wound up around the spool  26  until the first frame or the first unexposed frame ( 208 ,  209 ) reaches an exposure portion of the camera and the operation is stopped. These operations will be referred to as initial loading. 
     When the user turns on a rewinding switch ( 210 ), the operation shifts to a subsequently-described rewinding driving. When the user performs photographing ( 211 ), winding-up driving is performed by one frame for each photographing ( 212 ). When all the frames have been exposed ( 213 ), rewinding driving of the film  10  is performed ( 214 ), the VEI setting is performed to stop the indicator  8  at a position corresponding to the film use condition and the operation is stopped ( 215 ). When the user turns on a switch for unlocking the cartridge chamber lid  22  ( 216 ), the light lock door  6  is closed ( 217 ) and the cartridge chamber lid  22  is unlocked ( 216 ), so that the cartridge chamber lid  22  is openable ( 219 ). 
     A driving mechanism of a camera capable of performing the above-described series of operations is disclosed, for example, in Japanese Laid-open Patent Application No. H9-211590. 
     In the driving mechanism of this conventional example, a planet gear is provided for each of the operations of winding-up driving, rewinding driving, thrust driving, opening and closing driving of the light lock door  6  (including the cartridge chamber lid locking mechanism), and the operations are controlled by contact between a cam and followers of planet carriers holding the planet gears. For this reason, the number of parts is large, so that size reduction of the camera is difficult and the cost increases. 
     SUMMARY OF THE INVENTION 
     An object of the present invention is to provide a camera having a driving mechanism enabling reduction in the number of parts, not requiring a large space and being excellent in cost performance although having necessary functions. 
     To achieve the above object, according to one aspect of the present invention, a camera is provided with: at least one motor; a spindle gear (i.e. a gear having a spindle) for rewinding and thrusting a film; a cam that rotates together with the spindle gear when the spindle gear is rotated in a film-rewinding direction and that remains at rest when the spindle gear is rotated in a film-thrusting direction; a direction-limiting mechanism for permitting the spindle gear to rotate in the film-rewinding direction only when the motor is rotating in a forward direction; and a transmission mechanism that comes into contact with the cam when the motor is rotating in a reverse direction and that, when the cam is in one of predetermined rotation positions, engages with and thereby transmits a driving force of the motor to a corresponding one of driven members provided one for each of the predetermined rotation positions. In addition, in this camera, paths for transmitting the driving force of the motor are switched by first rotating the spindle gear in the film-rewinding direction to bring the cam into one of the predetermined rotation positions and then reversing a rotation direction of the motor. 
     According to another aspect of the present invention, a camera is provided with: at least one motor disposed inside the camera; a driving-force transmission unit for transmitting a driving force of the motor; a film cartridge chamber disposed in a side portion of the camera and having an opening through which a film cartridge is loaded and unloaded; a first sun gear that receives the driving force of the motor from the driving-force transmission unit and that is disposed above the film cartridge chamber; a spindle gear (i.e. a gear having a spindle) to which the driving force of the motor is transmitted by rotation of the first sun gear when necessary; a keyed spindle fixed on the spindle gear so as to rotate together therewith and so as to protrude therefrom into the film cartridge chamber to be fitted into a spool of the film cartridge; a spindle key formed on the keyed spindle so as to be fitted into a key groove formed in the spool to make the spool rotate together with the keyed spindle; a cam that rotates together with the spindle gear when the spindle gear is rotated in a direction in which a film is rewound back into the film cartridge and that remains at rest when the spindle gear is rotated in a direction in which the film is thrust out of the film cartridge; a light-lock door driving gear to which the driving force of the motor is transmitted by rotation of the first sun gear when necessary; a light-lock door driving mechanism for opening and closing a light-lock door of the film cartridge by using rotation of the light-lock door driving gear; a film winder disposed in an opposite side portion of the camera; a second sun gear disposed near the film winder; a spool gear to which rotation of the second sun gear is transmitted when necessary; a winding spool that rotates together with the spool gear to wind up the film pulled out of the film cartridge; a first transmission mechanism for transmitting a driving force of the first sun gear to drive the spindle gear in the film-rewinding direction; a second transmission mechanism for transmitting the driving force of the first sun gear to drive the spindle gear in the film-thrusting direction; a third transmission mechanism for transmitting the driving force of the first sun gear to the light-lock door driving gear; and a fourth transmission mechanism for transmitting a driving force of the second sun gear to the spool gear. In addition, in this camera, paths for transmitting the driving force of the motor are switched by selecting at least one of the second to fourth transmission mechanisms by first rotating the spindle gear in the film-rewinding direction to bring the cam into a predetermined rotation position and then reversing a rotation direction of the motor. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     This and other objects and features of this invention will become clear from the following description, taken in conjunction with the preferred embodiments with reference to the accompanied drawings in which: 
     FIG. 1 is an upper perspective view showing the structure of the film cartridge; 
     FIG. 2 is a lower perspective view showing the structure of the film cartridge; 
     FIG. 3 is a front view briefly showing the structure of the camera; 
     FIG. 4 is a flowchart showing the operations necessary for the camera; 
     FIG. 5A is a front view showing the structure of a camera according to a first embodiment of the present invention; 
     FIG. 5B is an upper view showing the structure of the camera according to the first embodiment of the present invention; 
     FIG. 6 is a front view showing the structure of a film; 
     FIG. 7 is a plan view showing the structure of a spindle gear of the embodiment; 
     FIG. 8 is a plan view showing the structure of a cam of the embodiment; 
     FIG. 9 is a plan view showing the structure of an LLD (light lock door) driver of the embodiment; 
     FIG. 10 shows a condition immediately after a film cartridge is loaded in a first driving mechanism of the embodiment; 
     FIG. 11 is a plan view showing a condition where a light lock door is opened in the first driving mechanism of the embodiment; 
     FIG. 12 is a plan view showing a condition at the time of rewinding in the first driving mechanism of the embodiment; 
     FIG. 13 is a plan view showing a condition where a spindle key is stopped in a thrust section in the first driving mechanism of the embodiment; 
     FIG. 14 is a plan view showing a condition of thrust driving in the first driving mechanism of the embodiment; 
     FIG. 15 is a plan view showing a condition where the spindle key is stopped in a winding-up section in the first driving mechanism of the first embodiment of the present invention; 
     FIG. 16 is a plan view showing a condition of winding-up driving in the first driving mechanism of the first embodiment of the present invention; 
     FIG. 17 is a plan view showing a condition where the spindle key is stopped in a “fully exposed” section in the first driving mechanism of the embodiment; 
     FIG. 18 is a plan view showing a condition before the light lock door is closed and a cartridge lid unlocking mechanism is unlocked in the first driving mechanism of the embodiment; 
     FIG. 19 is a plan view showing a condition immediately after the cartridge lid locking mechanism is unlocked in the first driving mechanism of the embodiment; 
     FIG. 20 is a schematic view showing operations for stop sections of the spindle key in the first embodiment of the present invention; 
     FIG. 21A is a schematic view showing the structure of the gears of the conventional example; 
     FIG. 21B is a schematic view showing the structure of the gears of the first embodiment of the present invention; 
     FIG. 22A is a front view showing the structure of a camera according to a second embodiment of the present invention; and 
     FIG. 22B is an upper view showing the structure of the camera according to the second embodiment of the present invention. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     A first embodiment of the present invention will be described with reference to the drawings. FIG. 5A is a front perspective view of a camera  20  of the embodiment. FIG. 5B is an upper perspective view thereof. A cartridge chamber  21  where a cartridge  1  is loaded is disposed on the left side viewed from the front A winding spool  26  for winding a film  10  therearound is disposed on the right side. 
     A cartridge chamber lid  22  for insertion of the cartridge  1  is provided at the lower end of the cartridge chamber  21 . A keyed spindle  31  engaged in a spool  3  of the cartridge  1  (see FIG. 1) and a spindle key  32  protruding from the keyed spindle  31  and engaged in the spool  3  together with the keyed spindle  31  are provided at the upper end. The keyed spindle  31  is fixed to a spindle gear (i.e. a gear having a spindle)  61  disposed above the cartridge chamber  21 . The keyed spindle  31 , the spindle key  32  and the spindle gear  61  are integrally rotatable about the same rotation axis as that of the spool  3 . 
     The spindle key  32  is buried in the keyed spindle  31  when abutting on the cylindrical surface  3   b  inside the spool  3 . When the spindle key  32  and a key groove  3   a  formed in the spool  3  coincide in phase, the spindle key  32  protrudes by the action of a non-illustrated compression spring imbedded in the keyed spindle  31  so as to be rotatable integrally with the spool  3 . With this structure, the phases of the spool  3 , the spindle key  32  and the spindle gear  61  are uniquely decided. 
     To the spindle gear  61 , a cam  51  is coupled by a subsequently-described one-way clutch. When the spindle gear  61  rotates in the counterclockwise direction viewed from the upper surface of the camera, the spindle gear  61  and the cam  51  rotate integrally. When rotating in the clockwise direction, the spindle gear  61  rotates idly so that the position of the cam  51  is maintained. The spindle gear  61  and the cam  51  constitute a first driving mechanism  30  together with other members described later in detail. The driving force for driving the driving mechanism  30  is transmitted with a first sun gear  91  as the starting point. The first sun gear  91  is engaged with a first planet gear  101  and a second planet gear  81 , and is driven by a motor  23  disposed in the spool  26  through a speed reducing mechanism  24 , a transmitting mechanism  25  and a transmitting axis  33  disposed in parallel with the rotation axis of the spindle gear  61 . 
     The driving force from the motor  23  is transmitted to a second sun gear  41  by way of the speed reducing mechanism  24 . The second sun gear  41  is engaged with a third planet gear  43  to constitute a second driving mechanism  40 . When necessary, the third planet gear  43  is engaged with a spool gear  27  rotating integrally with the winding spool  26  to rotate the winding spool  26 . 
     The third planet gear  43  is held by a non-illustrated planet carrier having a through hole engaged with the central axis (not shown) of the second sun gear  41  serving as the revolution axis of the third planet gear  43 . When the third planet gear  43  is rotated, an appropriate amount of frictional force is caused between the third planet gear  43  and the planet carrier by a non-illustrated compression spring sandwiched therebetween. 
     When the third planet gear  43  is engaged only with the second sun gear  41 , the third planet gear  43  has its rotation limited by the frictional force and makes a sun-and-planet motion in the same direction as the rotation direction of the second sun gear  41 . When the third planet gear  43  is engaged also with the spool gear  26  by the sun-and-planet motion, the third planet gear  43  has its sun-and-planet motion limited and rotates while maintaining the frictional force. Such an arrangement of a planet carrier and a planet gear where the rotation and the revolution (sun-and-planet motion) of the planet gear are controlled by the frictional force will hereinafter be referred to as frictional coupling. 
     When the motor  23  rotates in the normal direction (the film rewinding direction, details will be described later), the second sun gear  41  rotates in the direction of the arrow  41   a  and the third planet gear  43  revolves in the direction of the arrow  43   a . The spool gear  27  and the third planet gear  43  do not engage with each other. When the motor  23  rotates in the reverse direction, the third planet gear  43  revolves in the direction of the arrow  43   b , and the spool gear  27  and the third planet gear  43  engage with each other. The gears in the transmitting mechanism  25  are arranged so that the first sun gear  91  rotates in the direction of the arrow  91   a  when the motor  23  rotates in the normal direction. 
     In the center of the camera  20 , an exposure portion  36 , a first perforation sensor  16 , a second perforation sensor  17 , a magnetic head  34  and a pad  35  are disposed. To explain these members, the structure of the film  10  will be described. FIG. 6 shows a condition where the film  10  is drawn out of the cartridge  1 . On the film  10 , square perforations  11  are provided in the number in accordance with the number of exposures of the film  10  in such a manner that, assuming that an exposure region  18  is the first frame, a prediction perforation  12  for the first frame, a positioning perforation  13  for the first frame, a prediction perforation  14  for the second frame and a positioning perforation  15  for the second frame are provided above the exposure region  18 . The perforations  11  are used for positioning of the film  10 . In a lower part of the film  10 , magnetic recording regions  19  as many as the number of exposures of the film  10  are formed for recording of information such as whether flash is used or not during photographing. 
     In FIGS. 5A and 5B, the magnetic head  34  is provided for recording information onto the magnetic recording regions  19  and the pad  35  is provided for pushing the film  10  against the magnetic head  34 . The first and the second perforation sensors  16  and  17  are optical sensors The film  10  is positioned at a desired position by detecting the number of times light is transmitted and intercept when the perforations  11  move as the film  10  moves. The final positioning is decided when the cartridge  1  side edges  13   a  or  15   a  of the positioning perforations  13  or  15  intercept the light to the first perforation sensor  16 , and the exposure portion  36  of the camera  20  is aligned with the exposure region  18  of the film  10 . By using the second perforation sensor  17  and the prediction perforations  12  and  14 , the perforations  11  can be used for purposes other than positioning such as switching of driving. 
     Subsequently, details of the first driving mechanism will be described. FIGS. 7 and 8 show details of the spindle gear  61  and the cam  51 . In FIG. 7, the keyed spindle  31  having the spindle key  32  protruding therefrom is fixed to the spindle gear  61 , and the spindle gear  61  has in the center thereof a cylindrical surface  62  subsiding by an appropriate amount and a stopper surface  63  protruding from the cylindrical surface  62  by an appropriate amount toward the periphery. 
     In FIG. 8, the cam  51  has two-stage cam surfaces, namely, upper cam surfaces  58  and  59  (shown by the solid lines in the figure) and lower cam surfaces  54  to  57  (shown by the broken lies in the figure). The upper cam surfaces  58  and  59  have the concave cam surface  58  and the convex cam surface  59 . The lower cam surfaces  54  to  57  have the shallow cam surfaces  54  and  56  and the deep cam surface  57 . The shallow cam surfaces  54  and  56  have stopper surfaces  54   a  and  56   a  for controlling the rotation of the cam  51 . 
     In a hole  52   b  of the cam  51 , a plate spring  52  protruding from the lower surface of the cam  51  with a fulcrum  52   a  as the base end is formed along substantially the same circumference as that of the cylindrical surface  62  of the spindle gear  61  so as to be in the subsiding cylindrical surface  62 . The free end has an engagement surface  53  engaged with the stopper surface  63  of the spindle gear  61 . 
     Details of the first driving mechanism  30  having the cam  51  and the spindle gear  61  as main parts are shown in FIG.  10 . FIG. 10 shows the positional relationship among the parts immediately after the subsequently-described cartridge  1  is loaded. In FIG. 10, the cam  51  is disposed above the spindle gear  61  so as to have the same rotation center. By the rotation of the spindle gear  61  in the counterclockwise direction of the figure, the engagement surface  53  of the plate spring  52  and the stopper surface  63  are engaged, so that the cam  51  is rotated in the counterclockwise direction By the rotation of the spindle gear  61  in the clockwise direction, the plate spring  52  slides on the inner wall of the cylindrical surface  62  while abutting thereon, so that the position of the cam  51  is substantially maintained. A first engagement portion  74  of a rewinding planet gear control lever  71  attached so as to be rotatable about a central axis (a fulcrum)  72  is engaged with the lower-stage cam surface  57  of the cam  51 . A protrusion  85  of a thrust planet carrier  83  holding the second planet gear (hereinafter, referred to as thrust planet gear)  81  and being rotatable about the central axis  84  abuts on the upper-stage cam surface  59 . 
     The rewinding planet gear control lever  71  receives force in the clockwise direction of the figure with the contral axis  72  as the center by a non-illustrated tension spring provided in a concave  73 . The rewinding planet gear control lever  71  has the above-mentioned first engagement portion  74  at one end and has a second engagement portion  75  at the other end. The thrust planet gear  81  is formed to have two stages for speed reduction. A large-diameter planet gear  81   u  of the upper stage is always engaged with the first sun gear  91  and rotates by being driven by the motor  23 . A small-diameter planet gear  81   d  of the lower stage drives the spindle gear  61  by engaging with the spindle gear  61  when the protrusion  85  of the thrust planet carrier  83  abuts on the concave cam surface  58 . The thrust planet carrier  83  makes the above-mentioned frictional coupling with the thrust planet gear  81 . When the first sun gear  91  rotates in the clockwise direction of the figure (direction of reverse rotation of the motor), the thrust planet gear  81  rotates about the central axis  84  in the counterclockwise direction, so that the protrusion  85  abuts on the cam surfaces  58  and  59 . When the first sun gear  91  rotates in the counterclockwise direction (direction of normal rotation of the motor), the protrusion  85  is separated from the cam surfaces  58  and  59 . 
     The first sun gear  91  is also engaged with a large-diameter planet gear  92   d  of the lower stage of the first planet gear (hereinafter, referred to as rewinding planet gear)  92  formed to have two stages for speed reduction. The rewinding planet gear  92  makes a sun-and-planet motion about the transmitting axis  33  for transmitting the driving force from the motor  23 . A rewinding planet carrier  94  holding the rewinding planet gear  92  makes the frictional coupling with the rewinding planet gear  92 . By the rotation of the first sun gear  91  in the counterclockwise direction (direction of normal rotation of the motor), the large-diameter planet gear  92   d  of the lower stage of the rewinding planet gear  92  is engaged with the spindle gear  61 . By the rotation of the first sun gear  91  in the clockwise direction (direction of reverse rotation of the motor), a small-diameter planet gear  92   u  of the upper stage of the rewinding planet gear  92  is engaged with a light lock door (LLD) driving gear  101  for driving a light lock door opening and closing mechanism  100 . 
     The light lock door opening and closing mechanism  100  opens and closes the light lock door  6  of the cartridge  1 , and comprises the LLD driving gear  101 , an LLD driving lever  111 , an LLD driving converting lever  121  and an LLD driver  131 . The LLD driving lever  111  has an elongate hole  114  and a rack  113  substantially in the center. The elongate hole  114  is a through hole. The rack  113  is dug down by an appropriate amount. The LLD driving lever  111  has at one end an engagement portion  115  and has at the other end a through hole  112  engaged with a decentering axis  103  of the LLD driving gear  101 . 
     The LLD driving converting lever  121  has a gear  123  engaged with the rack  113 , is placed so as to be rotatable about the central axis  122 , and has a movement axis  124  at the end. The central axis  122  guides the elongate hole  114  of the LLD driving lever  111 . The LLD driving lever  111  makes a crank motion about the central axis  102  with the central axis  122  as the fulcrum by the rotation of the LLD driving gear  101 . 
     The LLD driver  131  (parts thereof are shown in FIG. 9) is placed so as to be rotatable about the central axis  136 . In the LLD driver  131 , a groove  132  in which the movement axis  124  is slidable is dug by an appropriate amount. An opening and closing key  133  is fixed or integrally formed downward so as to protrude in the cartridge chamber  21 . The opening and closing key  133  has an unlocking surface  134  and an opening and closing surface  137 . The opening and closing key  133  is engaged in the key hole  4  of the cartridge  1 , so that the unlocking surface  134  pushes the locking portion  4   a  (see FIG. 1) to unlock the light lock door  6  and the opening and closing surface  137  rotates while engaging with the rotary portion  4   b  (see FIG.  1 ), thereby opening the light lock door  6 . 
     In the vicinity of the engagement portion  115  of the LLD driving lever  111 , an unlocking lever  141  is disposed for unlocking, by loading the cartridge  1  into the cartridge chamber  21 , a locking mechanism (not shown) for locking the cartridge chamber lid  22 . The unlocking lever  141  is rotatable about the central axis  143 , receives force in the counterclockwise direction of the figure by a non-illustrated torsion spring, and has an engagement surface  142  engaged with the engagement portion  115  of the LLD driving lever  111 . 
     Operations performed in the driving mechanism of the above-described structure will be described. FIG. 10 shows, as mentioned previously, a condition immediately after the cartridge  1  is loaded into the cartridge chamber  21  and the cartridge chamber lid  22  is closed. The loading of the cartridge  1  operates a non-illustrated locking mechanism to lock the cartridge chamber lid  22 . In FIG. 10, since the protrusion  85  of the thrust planet carrier  83  abuts on the upper-stage cam surface  59 , the spindle gear  61  and the thrust planet gear  81  are not engaged with each other and the first engagement portion  74  of the rewinding planet gear control lever  71  abuts on the deep cam surface  57  of the lower stage. 
     The rewinding planet gear  92  is engaged with the LLD driving gear  101 . The LLD driving lever  111  is placed so that the central axis  122  of the LLD driving converting lever  121  is situated at the right end of the elongate hole  114 . The movement axis  124  of the LLD driving converting lever  121  and the opening and closing key  133  are situated on the side closer to the rewinding planet gear  92 . The opening and closing key  133  is engaged in the key hole  4  of the cartridge  1 . The unlocking surface  134  pushes away the locking portion  4   a  of the key hole  4  toward the periphery of the key hole  4  to thereby unlock the light lock door  6 . 
     Then, as shown in FIG. 11, a driving to open the light lock door  6  is performed. In FIG. 11, when the motor  23  is rotated in the reverse direction, the first sun gear  91  rotates in the direction of the arrow  91   b  (see FIG.  5 B), so that the rewinding planet carrier  94  and the rewinding planet gear  92  receive force in the direction of the arrow  94   b  because of the frictional coupling and the rewinding planet gear  92  and the LLD driving gear  101  rotate in the directions of the arrows  92   b  and  101   b , respectively. By the rotation of the LLD driving gear  101 , the decentering axis  103  rotates about the central axis  102  in a direction such that the decentering axis  103  moves away from the LLD driver  131 , and the LLD driving lever  111  moves in the direction of the arrow  111   b.    
     By the driving force from the rack  113  to the gear  123  caused by the movement of the rack  113  and the elongate hole  114  that move together with the LLD driving lever  111 , the LLD driving converting lever  121  is rotated about the central axis  122  in the direction of the arrow  121   b . With this rotation, the movement axis  124  of the LLD driving converting lever  121  rotates the LLD driver  131  and the opening and closing key  133  about the central axis  136  in the direction of the arrow  131   b  while moving in the groove  132  of the LLD driver  131  first toward the rotation axis  136  of the LLD driver  131  and then toward the periphery. 
     By the rotation of the opening and closing key  133 , the opening and closing surface  137  is rotated while pushing the rotary portion  4   b  of the cartridge  1 , so that the light lock door  6  is opened. Then, the motor  23  is stopped by a non-illustrated detecting mechanism for detecting that the light lock door  6  is opened. At this time, the decentering axis  103  of the LLD driving gear  101  is situated in a position farthest away from the LLD driving converting lever  121 . Although the thrust planet gear  81  attempts to engage with the spindle gear  61  by receiving force in the direction of the arrow  83   b , it fails to achieve engagement because the protrusion  85  of the carrier  83  abuts on the convex cam surface  59 . As a result, the thrust planet gear  81  becomes unrelated to the driving system. While the spool gear  27  and the spool  26  are rotating in the film winding-up direction because the motor  23  is rotating in the reverse direction, the rotation of the spool gear  27  and the spool  26  is unrelated to the driving system because the film  10  has not been drawn out from the cartridge  1  yet. 
     Then, as shown in FIG. 12, reading of film information on the data disk  2  and detection of the film use condition are performed by the rewinding driving. In FIG. 12, when the motor  23  is rotated in the normal direction, the first sun gear  91  rotates in the direction of the arrow  91   a , the rewinding planet carrier  94  rotates in the direction of the arrow  94   a , and the thrust planet carrier  83  receives force in the direction of the arrow  83   a . The thrust planet gear  81  is controlled so as not to be disengaged from the first sun gear  91  by an abutting portion  76  of the rewinding planet gear control lever  71  abutting on the thrust planet carrier  83 , and is controlled so as not to engage with the spindle gear  61  by a protrusion  97  of the rewinding planet carrier  94  abutting on the thrust planet carrier  83 . 
     The rewinding planet carrier  94  causes the rewinding planet gear  92  and the spindle gear  61  to engage with each other, and by the rotation of the rewinding planet gear  92  in the direction of the arrow  92   a , the spindle gear  61  and the spool  3  in the cartridge  1  are rotated in the direction of the arrow  61   a  (the film rewinding direction) to perform rewinding driving. By the rewinding operation, the data on the data disk  2  and the position of the data disk  2  are read out by a non-illustrated bar code sensor. 
     By the engagement surface  53  of the plate spring  52  being engaged with the stopper surface  63  of the spindle gear  61 , the cam  51  is rotated integrally with the spindle gear  61  while the first engagement portion  74  of the rewinding planet gear control lever  71  is slidingly abutting on the lower-stage cam surface  57 . The lower-stage cam surfaces  54 ,  55 ,  56  and  57  (see FIG. 8) have inclined surfaces  54   b ,  56   b  and  57   b  so that the rotation of the first engagement portion  74  of the rewinding planet gear control lever  71  in the direction of the arrow  61   a  is not hindered. 
     The first driving mechanism  30  has a non-illustrated mechanism for detecting the position of the spindle key  32 . The center line of the spindle key  32  passing the rotation center of the keyed spindle  31  and the center of the spindle key  32  along the width is situated in an “unused” section  151 , an “exposed partway” section  152 , a “fully exposed” section  153  or a “developed” section  154  shown in FIG. 20 to thereby set the indicator  8  of the cartridge  1  at any of the marks  7  (“unused”  7   a , “exposed partway”  7   b , “fully exposed”  7   c  and “developed”  7   d ) to make the VEI setting. Hereinafter, the position of the center line of the spindle key  32  will be referred to as the position of the spindle key  32 . 
     In this embodiment, subsequently-described winding-up driving and thrust driving are performed by situating the spindle key  32  at the positions of a winding-up section  155  and a thrust section  156  in addition of the above-mentioned positions of the VEI setting. In this embodiment, the above-mentioned center line of the spindle key  32  coincides with the stopper surface  63  of the spindle gear  61 , and when the spindle gear is rotating in the direction of the arrow  61   a , the center line coincides with the engagement surface  53  of the cam  51  whose position is uniquely decided. Therefore, the sections in FIG. 20 represent the position of the engagement surface  53  of the cam  51  as well as the position of the spindle key  32 . Hereinafter, the position of the engagement surface  53  of the cam  51  will be referred to as the position of the cam  51 . 
     When the film use condition of the loaded cartridge  1  is different from the film use condition of the cartridge  1  taken out last time, the position of the spindle key  32  according to the VEI setting and the position of the key groove  3   a  of the loaded cartridge  1  disaccord with each other. In such a case, the spindle key  32  is engaged in the spool  3  while being imbedded in the keyed spindle  31  by being pushed by the inner wall of the spool  3  of the cartridge  1 , and when the position of the spindle key  32  and the phase of the key groove  3   a  in the spool  3  coincide with each other by the rotation of the spindle gear  61 , the spindle key  32  protrudes from the keyed spindle  31  by a compression spring provided in the keyed spindle  31  to thereby integrally rotate the spindle gear  61  and the spool  3 . 
     As a result of the detection of the position of the data disk  2  or the spindle key  32 , when the film use condition is “fully exposed” or “developed”, a subsequently-described operation to unlock the cartridge chamber lid  22  is performed, and when the film use condition is “unused” or “exposed partway”, the motor  23  is stopped when the spindle key  31  is in the thrust section  156  (see FIG. 20) as shown in FIG.  13 . At this time, the first engagement portion  74  of the rewinding planet gear control lever  71  abuts on the shallow cam surface  54  of the lower stage. 
     Then, thrust driving is performed. When the motor  23  is rotated in the reverse direction, the winding spool  26  to which the driving force from the motor  23  is transmitted by way of the second sun gear  41  and the third planet gear  43  rotates in the winding-up direction of the film  10  (see FIG.  5 B). In FIG. 14, the first sun gear  91  rotates in the direction of the arrow  91   b , and the rewinding planet carrier  94  and the thrust planet carrier  83  rotate in the directions of the arrows  94   b  and  83   b , respectively. 
     Since the first engagement portion  74  of the rewinding planet gear control lever  71  is at the shallow cam surface  54  of the lower stage, the second engagement portion  75  of the rewinding planet gear control lever  71  approaches the first sun gear  91  with the central axis  72  as the fulcrum, and engages with an engagement surface  95  of the rewinding planet carrier  94  to thereby limit the movement of the rewinding planet carrier  94 , so that the rewinding planet gear  92  is prevented from engaging with the LLD driving gear  101 . When the position of the cam  51  is in the thrust section  156 , since the protrusion  85  of the thrust planet carrier  83  abuts on the concave cam surface  58  of the upper stage, the thrust planet gear  81  is engageable with the spindle gear  61 , so that the spindle gear  61  is rotated in the direction of the arrow  61   b.    
     When the rotation direction of the spindle gear  61  is the direction of the arrow  61   b , since the stopper surface  63  of the spindle gear  61  and the engagement surface  53  of the cam  51  do not engage with each other, the cam  51  does not rotate integrally with the spindle gear  61 . However, rotational force is supplied to the cam  51  by the frictional force caused because of the abutment of the plate spring  52  on the cylindrical surface  62  of the spindle gear  61 . The rotational force is canceled by the first engagement portion  74  of the rewinding planet gear control lever  71  being engaged with the stopper surface  54   a  of the cam  51 , so that the position of the cam  51  is maintained. Consequently, the rotation of the spindle gear  81  in the direction of the arrow  61   b  is maintained, so that the film  10  is sent out. 
     Since the cam surface of the lower stage of the cam  51 , i.e. that surface which faces the thrust planet carrier  85 , is the deep cam surface  57  in this case, the thrust planet gear  81  is situated so that the spindle gear  61  and the small-diameter planet gear  81   d  of the lower stage are engaged with each other and that the large-diameter planet gear  81   u  of the upper stage gets in under the portion constituting the convex cam surface  59  of the upper stage. Consequently, since the deep can surface  57  of the lower stage also serves as the recess for preventing the large-diameter planet gear  81   u  of the upper stage and the cam  51  from abutting on each other, it is unnecessary to form a separate recess on the cam  51 . Therefore, the axial thickness of the cam  51  is reduced and the efficiency in space is excellent. 
     Then, by sensing the prediction perforation  12  of the first frame (see FIG. 6) by the second perforation sensor  17  (see FIG.  5 A), it is detected that the tip of the film  10  is caught by the winding spool  26  and the motor  23  is stopped. The detection that tho tip of the film  10  is caught by the winding spool  26  may be performed by another method. For example, the winding spool  26  and a member (not shown) for pushing the film  10  against the winding spool  26  are made of a conductive material and electric current is passed therebetween. The detection can be made by the electric current being intercepted by the film  10  getting in between the spool  26  and the member. 
     Then, the previously-described rewinding driving is performed (see FIG.  12 ), and as shown in FIG. 15, the positions of the spindle key  32  and the cam  51  move from the thrust section  156  to the winding-up section  155  and stop there. At this time, the first engagement portion  74  of the rewinding planet gear control lever  71  abuts on the shallow cam surface  56  of the lower stage. By the rewinding driving, the spool  3  makes one rotation (approximately 120 degrees in this embodiment) at the maximum to rewind the film  10 , so that the positional shift of the film  10  is large. When the shift hinders succeeding operations, adjustment can be made by delaying the stop period of the above-described thrust driving. 
     Then, winding-up driving is performed. When the motor  23  is rotated in the reverse direction, the winding spool  26  rotates in the winding-up direction of the film  10  like in the thrust driving (see FIG.  5 B). In FIG. 16, the first sun gear  91  rotates in the direction of the arrow  91   b , and the rewinding planet carrier  94  and the thrust planet carrier  83  receive force in the directions of the arrows  94   b  and  83   b , respectively. 
     Since the first engagement portion  74  of the rewinding planet gear control lever  71  is at the shallow cam surface  56  of the lower stage, the second engagement portion  75  of the rewinding planet gear control lever  71   a  approaches the first sun gear  91  with the central axis  72   a  s the fulcrum, and engages with the engagement surface  95  of the rewinding planet carrier  94  to thereby limit the movement of the rewinding planet carrier  94 , so that the rewinding planet gear  92  is prevented from engaging with the LLD driving gear  101 . 
     Since the position of the cam  51  is in the winding-up section  155 , the protrusion  85  of the thrust planet carrier  83  abuts on the convex cam surface  59  of the upper stage, so that the thrust planet gear  81  is prevented from engaging with the spindle gear  61 . Since no driving force from the first driving mechanism  30  is transmitted to the spindle gear  61 , the spindle gear  61  is rotated in the direction of the arrow  61   b  by being pulled by the film  10  by the rotation of the spool  26  in the winding-up direction. 
     Then, when the film use condition is “unused”, the edge  13   a  of the positioning perforation  13  for the first frame of the film  10  (see FIG. 6) is sensed by the first perforation sensor  16  (see FIG.  1 ), and by stopping the motor  23 , a predetermined position of the film  10  is set at the exposure portion  36  of the camera  20 . When the film use condition is “exposed partway”, the edge of the positioning perforation corresponding to the first unexposed frame of the film  10  is sensed by the first perforation sensor  16  and the motor  23  is stopped. 
     This completes the initial loading. Then, a user&#39;s operation such as photographing or forcible rewinding is waited for. 
     When the user performs photographing, after the shutter is released by a non-illustrated shutter releasing mechanism, the previously-described winding-up driving (see FIG. 16) is performed and a predetermined position of the next frame of the film  10  is set at the exposure portion  36  of the camera  20 . Then, the user&#39;s next operation is waited for. 
     When the last frame of the film  10  is exposed or when the user turns on a non-illustrated rewinding switch, as shown in the previously-described FIG. 12, the motor  23  rotates in the normal direction to perform rewinding driving, it is sensed by a non-illustrated sensor that the whole of the film  10  is housed in the cartridge  1 , the VEI setting is made, and then, the motor  23  is stopped. The VEI setting is made based on the positions of the spindle key  32  and the cam  51 . FIG. 17 shows a condition where the positions of the spindle key  32  and the cam  51  are stopped in the “fully exposed” section  153 . 
     Driving to close the light lock door  6  and driving of the unlocking lever  141  as shown in FIGS. 18 and 19 are automatically performed when the whole of the film  10  is housed in the cartridge  1 . These drivings are also performed when a non-illustrated unlocking switch of the cartridge chamber lid  22  is turned on by the user who performed rewinding. In FIG. 18, the motor  23  rotates in the reverse direction, and the first sun gear  91 , the thrust planet gear  81  and the rewinding planet gear  92  rotate in the directions of the arrows  91   b ,  81   b  and  92   b , respectively. 
     The thrust planet carrier  83  and the rewinding planet carrier  94  receive force in the directions of the arrows  83   b  and  94   b , respectively, and the rewinding planet gear  92  and the LLD driving gear  101  are engaged with each other, so that the LLD driving gear  101  rotates in the direction of the arrow  101   b . Since the position of the cam  51  is at the VEI setting position as mentioned above, the protrusion  85  of the thrust planet carrier  83  abuts on the convex cam surface  59  of the upper stage, and the thrust planet gear  81  and the spindle gear  61  are not engaged with each other, so that the driving of the spindle gear  61  is cut off. 
     By the rotation of the LLD driving gear  101  in the direction of the arrow  101   b , the decentering axis  103  rotates about the central axis  102  in a direction such that the decentering axis  103  approaches the LLD driver  131 , so that the LLD driving lever  111  moves in the direction of the arrow  111   a . By the driving force from the rack  113  to the gear  123  caused by the movement of the rack  113  and the elongate hole  114  which move together with the LLD driving lever  111 , the LLD driving converting lever  121  is rotated about the central axis  122  in the direction of the arrow  121   b . With this rotation, the movement axis  124  of the LLD driving converting lever  121  rotates the LLD driver  131  and the opening and closing key  133  about the central axis  136  in the direction of the arrow  131   a  while moving in the groove  132  of the LLD driver  131  first toward the rotation axis  136  and then toward the periphery. 
     By the rotation of the opening and closing key  133 , the rotary portion  4   b  of the cartridge  1  is rotated while pushing the opening and closing surface  137  of the opening and closing key  133  by a non-illustrated spring provided in the cartridge  1 , so that the light lock door  6  is closed. 
     At this time, the decentering axis  103  of the LLD driving gear  101  once moves in the downward direction of the figure while rotating in the direction of the arrow  101   b . Since the LLD driving lever  111  makes a crank motion with the central axis  122  of the LLD driving converting lever  121  as the fulcrum, the downward movement of the decentering axis  103  causes the engagement portion  115  of the LLD driving lever  111  to move upward (arrow  115   a ). Consequently, the engagement portion  115  of the LLD driving lever  111  moves in the directions of the arrows  111   a  and  115   a  and, as shown in the figure, can be situated above the engagement surface  142  of the unlocking lever  141 . 
     When the LLD driving gear  101  is further rotated from the condition shown in FIG. 18, as shown in FIG. 19, the decentering axis  103  of the LLD driving gear  101  moves upward in the figure while rotating in the direction of the arrow  101   b , so that the engagement portion  115  of the LLD driving lever LLD moves in the direction of the arrow  115   b  and is engaged with the engagement surface  142  of the unlocking lever  141  to rotate the unlocking lever  141  about the central axis  143  in the direction of the arrow  141   b . Consequently, the cartridge chamber lid  22  is unlocked and the motor  23  is stopped by a non-illustrated detecting mechanism for sensing the unlocking. 
     These operations enable the user to open the cartridge chamber lid  22  and the cartridge  1  is taken out FIG. 19 shows a condition immediately before the engagement portion  115  of the LLD driving lever  111  and the engagement surface  142  of the unlocking lever  141  are disengaged. The engagement portion  115  and the engagement surface  142  are disengaged immediately after this condition, and the unlocking lever  141  is returned to its original position by a non-illustrated torsion spring. At this time, the decentering axis  103  of the LLD driving gear  101  is in a position closest to the LLD driver  131  and is set in a condition for waiting for the cartridge  1  to be taken out. 
     Table 1 provides a summary of the conditions of the first driving mechanism  30  in the operations shown in FIGS. 10 to  19  and conditions of the second driving mechanism  40 . Here, the first sun gear  91 , the second sun gear  41 , the thrust planet gear  81 , the rewinding planet gear  92  and the third planet gear  43  are always rotating while the motor  23  is rotating. In Table 1, the operations have the same operation numbers as those shown in the flowchart (see FIG. 4) showing the example of the operations necessary for the camera. 
     FIGS. 21A and 21B show the structure of the gears in the first embodiment of the present invention in comparison with those of the conventional example. FIG. 21A shows the engagement relationship among the gears shown in the previously-described Japanese Laid-open Patent Application No. H9-211590. FIG. 21B shows the engagement relationship among the gears of the first embodiment of the present invention. M represents the motor. F represents the spindle gear. L represents the LLD driving gear. S represents the spool gear. C represents a cam gear. Reference numerals  161   a  to  161   d  represent sun gears. Reference numerals  162   a  to  162   g  represent planet gears. Reference numerals  163   a  to  163   d  represent driving force transmitting mechanisms. Reference numeral  171  represents one side of the camera where the cartridge chamber is disposed. Reference numeral  172  represents the other side of the camera where the spool is disposed. 
     According to this, in the first embodiment of the present invention, the cam gear and one planet gears are deleted compared with the conventional example. Since the parts are disposed so as to be distributed on both sides of the camera, the influence of the driving mechanism having a larger volume is greater in reducing the size of the camera. Viewing only the cartridge chamber side having a larger volume, the cam gear, one sun gear and two planet gears are deleted. 
     In the above-described first embodiment, when the position of the cam  51  is situated in the winding-up section, the thrust planet gear  81  and the rewinding planet gear  92  are disengaged from the spindle gear  61 , and by the rotation of the spool gear  27  by the reverse rotation of a motor  21 , winding-up driving is performed. However, since the rotation direction of the spindle gear is the same during thrust driving and during winding-up driving, winding-up driving can be performed with the position of the cam  51  being maintained in the thrust section  156  like in a subsequently described second embodiment. 
     FIG. 22A is a front view showing a camera according to the second embodiment of the present invention. FIG. 22B is an upper view thereof. In these figures, a third sun gear  181  is engaged with the second sun gear  41 , and a fourth planet gear  182  and a fifth planet gear  183  with the distance from the third sun gear  181  maintained by a planet carrier  186  is engaged with the third sun gear  181 . The fourth and the fifth planet gears  182  and  183  make a frictional coupling with the planet carrier  186 . 
     First and second clutch gears  184  and  185  coupled to the driving transmitting mechanism  25  are disposed in positions where the gears  184  and  185  are engageable with the fourth and the fifth planet gears  182  and  183 . When the motor  21  rotates in the normal direction, the fifth planet gear  183  makes a sun-and-planet motion to be engaged with the second clutch gear  185 . When the motor  21  rotates in the reverse direction, the fourth planet gear  182  makes a sun-and-planet motion to be engaged with the first clutch gear  184 . 
     The first clutch gear  184  and the second clutch gear  185  have the same rotation center. One of them has a non-illustrated plate spring like the cam  51  and the other thereof has a non-illustrated stopper surface like the spindle gear  61  to constitute a one-way clutch mechanism for transmitting unidirectional rotation like the cam  51  and the spindle gear  51 . The first clutch gear  184  rotates the second clutch gear  185  in the direction of the arrow  184   b  of the figure (direction of reverse rotation of the motor) when rotating in the direction of the arrow  184   b . However, when the second clutch gear  185  rotates in the direction of the arrow  184   b , the rotation is not transmitted to the first clutch gear  184 . 
     In the second driving mechanism  40  of this structure, when the motor  21  rotates in the normal direction, the rotation of the second sun gear  41  separates the third planet gear  43  from the spool gear  27  and rotates the third sun gear  181 . The rotation of the third sun gear  181  separates the fourth planet gear  182  from the first clutch gear  184 , engages the fifth planet gear  183  with the second clutch gear  185 , and rotates the first sun gear  91  in the direction of the arrow  91   a  through the driving transmitting portion  25 . At this time, although the rotation of the second clutch gear  185  in the direction of the arrow  184   a  is transmitted to the first clutch gear  184 , the first clutch gear  184  and the fourth planet gear  182  are unrelated to the driving system because they are separated. 
     A driving force is thus transmitted to the first driving mechanism  30 , and by the rotation of the first sun gear  91  in the direction of the arrow  91   a  caused by the rotation of the motor  21  in the normal direction, the previously-described rewinding driving is performed. 
     Then, when the motor  21  is rotated in the reverse direction with the aforementioned position of the cam  51  being in the thrust section  155 , the second sun gear  41  rotates in the direction of the arrow  41   b  and the third planet gear  43  rotates to be engaged with the spool gear  27  to rotate the spool gear  27  in the film winding-up direction (arrow  27   b ). The third sun gear  181  engages the fourth planet gear  182  with the first clutch gear  184  and rotates the first clutch gear  184  in the direction of the arrow  184   b . With this rotation, the second clutch gear  185  is rotated in the direction of the arrow  184   b  and the first sun gear  91  is rotated in the direction of the arrow  91   b  through the driving transmitting portion  25  to perform the previously-described thrust driving. 
     When the winding spool  26  catches the film  10  during thrust driving, the winding spool  26  performs rewinding. At this time, rotation is transmitted in the order of the spindle gear  61 , the thrust planet gear  81 , the first sun gear  91  and the driving transmitting portion  25  by the film  10  pulled by the winding spool  26 , so that the second clutch gear  185  is rotated in the direction of the arrow  184   b . On the other hand, the second clutch gear  185  is rotated by the rotation of the first clutch gear  184  in the direction of the arrow  184   b  transmitted by way of the second sun gear  41 , the third sun gear  181  and the fourth planet gear  182 . 
     Thus, to the overall driving mechanism, driving force is simultaneously transmitted through two paths. When rotating in the direction of the arrow  184   b , the second clutch gear  185  can rotate at a higher speed than the first clutch gear  184  by the second clutch gear  185  and the first clutch gear  184  being disengaged from each other by the above-described clutch mechanism. The difference in driving force between the two paths can be absorbed by considering speed reduction during driving force transmission to the spindle gear  61  so that the speed at which the spindle gear  61  pushes out the film  10  is sufficiently lower than the speed at which the winding spool  26  winds the film  10 . Consequently, winding-up driving with the position of the cam  51  being in the thrust section  155  is enabled. 
     When thrust driving and winding-up driving are simultaneously performed, since the film  10  rewinding radius of the spool  3  in the cartridge  1  and the winding spool  26  varies according to the amount by which the film  10  has been wound up, the speed at which the spindle gear  61  pushes out the film  10  gradually decreases, and the speed at which the winding spool  26  winds up the film  10  gradually increases. A very complicated mechanism is necessary for synchronizing the speeds associated with the spindle gear  61  and the winding spool  26  (spool gear  27 ) according to the winding-up condition of the film  10  in order to prevent the film  10  from becoming loose in the camera  20 . However, according to this embodiment, it is unnecessary to sychronize the speeds, so that the mechanism for simultaneously performing thrust driving and winding-up driving can be simplified. Moreover, according to this structure, although the number of parts constituting the driving mechanism increase no means is necessary for sensing whether the film  10  is caught by the winding spool  26  or not and the driving control method can be simplified. 
     Table 2 provides a summary of the operation conditions of the first driving mechanism  30  and the second driving mechanism  40  in the second embodiment. In the table, the operation number  207  is unnecessary (see FIG.  4 ). 
     Obviously, many modifications and variations of the present invention are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced other than as specifically described. 
     
       
         
               
               
               
               
               
               
               
               
             
           
               
                 TABLE 1 
               
               
                   
               
               
                   
                   
                   
                 Rotation 
                   
                   
                   
                   
               
               
                   
                   
                 Rotation 
                 Direction of 
                 Gear Meshed 
               
               
                 Operation 
                   
                 Direction of 
                 Spindle Gear 
                 with Spindle 
                 LLD Driving 
                 Position of 
               
               
                 No. 
                 Operation 
                 Motor 23 
                 61 
                 Gear 61 
                 Gear 101 
                 Cam 51 
                 Spool Gear 27 
               
               
                   
               
             
             
               
                 203 
                 Open the light lock 
                 Reverse 
                   
                   
                 Rotating 
                 VEI setting 
                 Rotating (no 
               
               
                   
                 door 6 
                   
                   
                   
                   
                 position 
                 film) 
               
               
                 204-205 
                 Read the data disk 2 
                 Forward 
                 Counter- 
                 Rewinding 
                   
                 Rotating 
               
               
                   
                   
                   
                 clockwise 
                 planet gear 92 
               
               
                   
                 Stop 
                   
                   
                   
                   
                 Thrust section 
               
               
                 206-207 
                 Drive the film 10 in 
                 Reverse 
                 Clockwise 
                 Thrust planet 
                   
                 Thrust section 
                 Rotating (no 
               
               
                   
                 the thrust direction 
                   
                   
                 gear 81 
                   
                   
                 film) 
               
               
                 208-209 
                 Move the cam 51 
                 Forward 
                 Counter- 
                 Rewinding 
                   
                 Rotating 
               
               
                   
                   
                   
                 clockwise 
                 planet gear 92 
               
               
                   
                 Stop 
                   
                   
                   
                   
                 Winding-up 
               
               
                   
                   
                   
                   
                   
                   
                 section 
                 section 
               
               
                   
                 Wind up the film 10 
                 Reverse 
                 Clockwise 
                 None 
                   
                 Winding-up 
                 Rotating 
               
               
                   
                   
                   
                   
                   
                   
                 section 
               
               
                 212 
                 Wind up the film 10 
                 Reverse 
                 Clockwise 
                 None 
                   
                 Winding-up 
                 Rotating 
               
               
                   
                   
                   
                   
                   
                   
                 section 
               
               
                 214-215 
                 Rewind the film 10 
                 Forward 
                 Counter- 
                 Rewinding 
                   
                 Rotating 
               
               
                   
                   
                   
                 clockwise 
                 planet gear 92 
               
               
                   
                 Set VEI and then 
                   
                   
                   
                   
                 VEI setting 
               
               
                   
                 stop 
                   
                   
                   
                   
                 position 
               
               
                 217-218 
                 Close the light lock 
                 Reverse 
                   
                   
                 Rotating 
                 VEI setting 
                 Rotating (no 
               
               
                   
                 door 6 and unlock 
                   
                   
                   
                   
                 position 
                 film) 
               
               
                   
               
             
          
         
       
     
     
       
         
               
               
               
               
               
               
               
               
             
           
               
                 TABLE 1 
               
               
                   
               
               
                   
                   
                   
                 Rotation 
                   
                   
                   
                   
               
               
                   
                   
                 Rotation 
                 Direction of 
                 Gear Meshed 
               
               
                 Operation 
                   
                 Direction of 
                 Spindle Gear 
                 with Spindle 
                 LLD Driving 
                 Position of 
               
               
                 No. 
                 Operation 
                 Motor 23 
                 61 
                 Gear 61 
                 Gear 101 
                 Cam 51 
                 Spool Gear 27 
               
               
                   
               
             
             
               
                 203 
                 Open the light lock 
                 Reverse 
                   
                   
                 Rotating 
                 VEI setting 
                 Rotating (no 
               
               
                   
                 door 6 
                   
                   
                   
                   
                 position 
                 film) 
               
               
                 204-205 
                 Read the data disk 2 
                 Forward 
                 Counter- 
                 Rewinding 
                   
                 Rotating 
               
               
                   
                   
                   
                 clockwise 
                 plant gear 92 
               
               
                   
                 Stop 
                   
                   
                   
                   
                 Thrust section 
               
               
                 206 
                 Drive the film 10 in 
                 Reverse 
                 Clockwise 
                 Thrust planet 
                   
                 Thrust section 
                 Rotating (no 
               
               
                   
                 the thrust direction 
                   
                   
                 gear 81 
                   
                   
                 film) 
               
               
                 208-209 
                 Wind up the film 10 
                 Reverse 
                 Clockwise 
                 Thrust planet 
                   
                 Thrust section 
                 Rotating 
               
               
                   
                   
                   
                   
                 gear 81 
                   
                   
               
               
                 212 
                 Wind up the film 10 
                 Reverse 
                 Clockwise 
                 Thrust planet 
                   
                 Thrust section 
                 Rotating 
               
               
                   
                   
                   
                   
                 gear 81 
               
               
                 214-215 
                 Rewind the film 10 
                 Forward 
                 Counter- 
                 Rewinding 
                   
                 Rotating 
               
               
                   
                   
                   
                 clockwise 
                 planet gear 92 
               
               
                   
                 Set VEI and then 
                   
                   
                   
                   
                 VEI setting 
               
               
                   
                 stop 
                   
                   
                   
                   
                 position 
               
               
                 217-218 
                 Close the light lock 
                 Reverse 
                   
                   
                 Rotating 
                 VEI setting 
                 Rotating (no 
               
               
                   
                 door 8 and unlock 
                   
                   
                   
                   
                 position 
                 film)