JP2003233112A - Power switching device for camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power switching device of a camera which is made simple, whose number of parts is reduced, which is made small-sized and by which inconvenience is not caused because the switching of an epicyclic gear serving for the switching of power is reliably performed. <P>SOLUTION: The camera provided with a driving source and a feeding gear train to transmit the power by which the spool shaft of a film cartridge is rotated is provided with the epicyclic gear contributing to the switching of the power in the feeding gear train. Moreover, the camera possesses a first position at which the epicyclic gear is stopped, a second position, and a third position at which the epicyclic gear is meshed with a transmitting/driving gear to which the power is outputted in an operation range between the first position and the second position. A regulating means to regulate the movement of the epicyclic gear from the first position to the second position regulates the movement of the epicyclic gear at the third position. The camera also possesses a restriction releasing means to release the restriction of the movement of the epicyclic gear from the second position to the first position. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to miniaturization of a film feeding mechanism and a cartridge chamber lid closing and locking mechanism used in a camera.

[0002]

2. Description of the Related Art In recent years, there has been proposed a film cartridge constructed so that a light-shielding door of the cartridge is opened / closed after the film is loaded into the camera with all the film accommodated in the cartridge. In a photographic system called this advanced photo system (abbreviated as APS), a film outlet of a film cartridge is provided with a light shielding door, which is opened and closed by a light shielding door opening / closing mechanism provided in a camera. The light-shielding door is opened when the film is discharged, and is closed when the cartridge chamber lid is opened after the film is stored in the cartridge and the cartridge is taken out. In a camera using such a film cartridge, a mechanism for opening and closing the above-mentioned light-shielding door is provided on the main body side, and the mechanism is associated with an opening / closing shaft that opens and closes the light-shielding door of the film cartridge when the film is loaded. I am fit.

In recent compact cameras, various film feeding mechanisms have been devised in order to achieve downsizing and reduction of the number of parts. In addition, a number of cameras have been developed that use electric power to operate the closing and locking mechanism of the cartridge chamber lid that opens and closes when the film cartridge is taken in and out. It is superior in operability in comparison. Some of the power for operating the cartridge chamber lid closing / locking mechanism uses part of the power of the film feeding mechanism, and some uses part of the zoom driving force of the lens barrel. Utilizing a part of the other power as described above is advantageous for downsizing without requiring a new power source.

For example, in the camera feeding device disclosed in Japanese Unexamined Patent Publication No. 11-109461, the power of one driving source is switched to wind and rewind the film and to open and close the light shielding door of the film cartridge. is there. 1
Since power is transmitted to multiple mechanisms with one motor, an extra power source can be omitted, space efficiency is improved, and size reduction is effective. As in this disclosure example, generally, in a power switching device for a camera, a planetary gear that is rotatable in a certain section of a gear train is provided, and the power output destination is determined by a restricting member that restricts the operation range of the planetary gear. It is configured to do.

Further, in the camera disclosed in Japanese Patent Application Laid-Open No. 09-244110, the rotation of the sun gear is ensured in order to ensure the planetary gear switching operation of the planetary gear mechanism for switching the transmission system of the film feeding mechanism. An auxiliary member for urging the planetary gear in the meshing direction with the force is provided.

[0006]

In a power switching device for a camera that drives a plurality of mechanisms by switching the film feeding power as described above, the revolution force of the planetary gear in the power switching depends on the friction force. However, the revolving force is not so large, and it is considered that the operation becomes unstable and the planetary gear cannot be moved to the power switching destination. Further, if the planetary gears are loaded with some load, it is necessary to supplement the planetary revolution force.

The problem to be solved by the present invention is to provide a compact camera power switching device having a simple structure with a small number of parts, and to reliably switch the planetary gears used for power switching without causing any inconvenience. A power switching device for a camera is provided.

[0008]

A camera power switching device according to the present invention comprises a drive source and a feed gear train for transmitting power for rotating a spool shaft of a film cartridge.
And a planetary gear used for power switching in the feed gear train, the first position in which the planetary gear stops, the second position, the first position and the second position. The planetary gear has a third position in the operating range between the position and the position where the planetary gear meshes with a transmission drive gear that is a power output destination, and the planetary gear moves from the first position to the second position. It is characterized in that the restricting means for restricting restricts the operation of the planetary gear at the third position.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIG. 1 is a front view of a camera body to which the first embodiment of the present invention is applied. 2 is a perspective view of a camera to which the first embodiment of the present invention is applied. As shown in FIG. 1, the feed gear trains 11 to 19 are arranged on the lower surface side of the main body. Further, 9 is a pressing plate of the feeding gear train. Cartridge chamber cover 2
The lock gear 51 (cartridge chamber lid close locking mechanism) involved in locking in the closed state rotates when it meshes with the planet gear 181 used for power switching in the feeding gear train. The lock gear 51 is configured to transmit power by a transmission shaft 52 to a light blocking door opening / closing mechanism arranged on the top surface of the camera. In addition, the camera body 1 in which the parts are assembled as shown in FIG.
Covered with 1, 92, 93. Reference numeral 94 is a cartridge chamber lid hinge.

In FIG. 3, the outer shape of the film cartridge 3 used in this embodiment and the light-shielding door opening / closing shaft 3 provided therein.
1 shows a light shielding door opening / closing driver 44 that engages with 1.
As shown in the figure, a light-shielding door 32 is provided at the film discharge port of the film cartridge 3, and is opened when the film is discharged, and closed when the film cartridge 3 is taken in and out of the camera. In the opening / closing operation of the light shielding door 32, the light shielding door opening / closing driver 44 engages with the light shielding door opening / closing shaft 31 of the film cartridge 3 and rotates to open / close the light shielding door 32. This light-shielding door opening / closing driver 44 has a gear 441.
Is provided, and power is transmitted from the power source via the gear 441. Further, a data disk 35 is provided on the upper surface side of the film cartridge 3 and is rotated together with the rotation of the spool shaft 33, and the film use status of the film cartridge 3 is read by the optical detection means on the camera side.

Next, the structure of the cartridge chamber lid 2 used in this embodiment will be described with reference to FIGS. The gear 24 for transmitting power from the camera body side is the fork gear 2
Mesh with 3. The fork gear 23 engages with the key 22 and rotates together. The key 22 is biased by a spring 21 so that it can be retracted in the axial direction when the cartridge chamber lid 2 is opened and closed. The key 22 engages with the shaft 33 of the film cartridge 3 to rotate the shaft 33 to discharge or store the film. The holding plate 25 is provided with a claw 251.
When the cartridge chamber cover 2 is closed, it is locked by the fan-shaped locking portion 513 of the lock gear 51 and the closed state is maintained.
The shaft retainer 27 urges the shaft 33 of the film cartridge 3 in the axial direction to determine the position of the film cartridge 3. The shaft retainer 27 is biased by a spring 26. A light shielding rubber 28 is provided between the lid cover 29 and the pressing plate 25.
Are arranged. As described above, the fork gear 23 for rotationally driving the shaft 33 of the film cartridge and the key 22 for engaging with the fork gear 23 are arranged inside the cartridge chamber lid 2.

Next, FIGS. 6 to 12 show views of the camera as seen from the lower surface side. As shown in the figure, the power from the motor 10 is fed to the gear 11, the belt 121, and the gear 1 in the gear train.
2 ... Transmission with the gear 19 causes the gear 19 to mesh with the gear 24 arranged inside the cartridge chamber lid 2. Also, 1
Reference numeral 11 is a rotation detecting element, and 112 is a rotation detecting plate.

The gear 18 is a sun gear that serves as the center of rotation of a planetary mechanism including planetary gears 181 and 182 and a planetary arm 183. The planet gears 181 and 182 are the motor 10
The rotation of the gear 18 causes a change in the rotation direction of arrow A.
Alternatively, it can be rotated in the direction of arrow B, and the meshing gears can be switched.

A cam 191 is integrally provided on the upper portion of the gear 19. The gear of the feeding gear train is the motor 1.
When the rotary drive from 0 is transmitted and the gear 19 rotates, the cam on the gear 19 also rotates. The rotation of the cam 191 operates the switching lever 202. A cam switch 201 that detects the operating state of the switching lever 202 is provided near the switching lever 202, detects the position of the switching lever 202, and constantly urges the switching lever 202 in the direction of pressing the cam 191. is doing.

A detailed view of the switching lever 202 is shown in FIGS. 13 and 14. The switching lever 202 has a rotatable claw portion 202a rotatable at one end and a cam 191.
A contact portion 202b that abuts on the cam surface. When the rotating claw portion 202a is incorporated in the switching lever 202, the rotating claw portion 202a can rotate in the a direction around the rotation axis. Here, since the P surface of the switching lever 202 and the Q surface of the rotary claw portion 202a are in contact with each other in the assembled state, the rotation in the anti-a direction is restricted from that state. FIG. 14 shows this switching lever 2
It is the figure which looked at 02 from the back. Further, the rotary claw portion 202a
Is provided with an urging means for returning to the original position when the external force disappears after rotating in the direction a by the external force. For example, in this embodiment, a spring as shown in FIG. 202c is provided.

Here, the actual operation of the planetary gears 181 and 182 will be described in detail. The state in which the film is being wound is shown in FIG. 8, and the planetary gear 181 rotates in the direction of arrow B and meshes with the gear 19. The state in which the film is rewound is shown in FIG.
2 rotates in the direction of arrow A and meshes with the gear 19.
Gear 1 during the hoisting or rewinding operation
Since 9 rotates, the cam lever 202 operates in conjunction with the rotation of the cam 191. The cam 191 allows the cam lever 202 to be in two states. 6 shows a state in which the cam lever 202 is positioned in the concave portion of the cam 191 (the cam 191 is in the cartridge chamber lid opening phase), and FIG. 7 shows a state in which the cam lever 202 is positioned in the convex portion of the cam 191 (the cam 191 is Thrust phase).

When the planet gear is in the rewinding state as shown in FIG. 12, if the rotation direction of the motor 10 is reversed and driven in the winding direction, the cam lever 202 causes
When the planet gear 181 stops at a position where it meshes with the gear 512, and when the planet gear 181 passes through the gear 512 and the gear 1
9 will be in either state when meshing. (In FIG. 12, since the cam 191 is in the cartridge chamber cover opening phase, when it is rotated in the winding direction, the state shown in FIG.
The planet gear 181 meshes with the gear 512. ) Planetary gear 1
When 81 stops at a position where it meshes with the gear 512, power is transmitted to a mechanism for opening the cartridge chamber lid,
When the planetary gear 181 passes through the gear 512 and meshes with the gear 19, the fork gear 23 is rotated through the gear 19 to perform a film winding (thrust) operation.

Further, in the mechanism shown in this embodiment, when switching from the winding state to the rewinding state as shown in FIG. 8, regardless of the state of the cam lever 202 (phase of the cam 191), the mechanism meshes with the gear 512 and the cartridge chamber lid is closed. The rewinding state is always maintained without switching the power to the opening / closing mechanism. This is the rewinding rotation of the cam 191.
In order to position the phase of, the cam 191 is rotated during the rewinding rotation.

Therefore, as shown in FIGS. 9 to 11, the rotary claw portion 202a of the switching lever 202 is provided on the planetary arm 1.
Upon contact with 83, the rotary claw portion 202a rotates and retracts. In FIG. 9, the phase of the cam 191 is the phase of opening the cartridge chamber cover, and after switching from the winding state to the rewinding state, the planet arm 183 moves in the direction of arrow A.
It shows a state in which the rotary claw portion 202a is rotated and is in contact with the rotary claw portion 202a. When it further rotates, the rotary claw portion 202a is pushed by the planet arm 183 and rotates in the direction of arrow a as shown in FIG. At this time, since the rotating claw portion 202a is biased so as to maintain the original position, the planetary arm 183 must operate against the biasing force, but in this state, the planetary gear 181 meshes with the gear 512. Because of the position, this meshing increases the revolution force of the planet arm 183.
Therefore, the planet gears 181 and 182 smoothly revolve without applying a large frictional force to the planet gears. FIG. 11 is a diagram showing a state where the rotary claw portion 202a is completely retracted.
When the rotation is further continued, the planetary gear 182 meshes with the gear 19 and rewinds as shown in FIG.
2a returns to the original state.

Further, in this embodiment, the cartridge chamber lid closing and locking mechanism and the light shielding door opening / closing mechanism for transmitting and driving power when the planetary gear 181 meshes with the gear 512 are shown in FIGS.
2 shows. The lock gear 51 has gears above and below, and the lower gear 512 obtains power for rotating the lock gear 51 when meshed with the planet gear 181. The upper gear 511 meshes with the gear 521 of the transmission shaft 52 and transmits the power to the light shielding door opening / closing mechanism arranged on the upper surface side. Further, the lock gear 51 has a fan-shaped locking portion 513. When the cartridge chamber lid 2 is closed, the locking portion 513 is a claw 25 of the pressing plate 25 incorporated in the cartridge chamber lid 2.
Lock 1 The transmission shaft 52 has upper and lower gears 521 and 52.
2, the gear 521 meshes with the lock gear gear 511, and the gear 522 meshes with the fan-shaped gear 41 on the upper surface side. The gear 41 and the gear 42 are connected by an absorption spring 43. The gear 42 meshes with a light shielding door opening / closing driver 44,
Power can be transmitted to drive the light-shielding door opening / closing driver 44 to rotate. Here, 45 is a pressing plate.

The spring 421 and the spring 422 are respectively the gear 4
2. The light shielding door opening / closing driver 44 is energized. Therefore, when power is not transmitted to the light shielding door opening / closing driver 44, the light shielding door opening / closing driver 44 can be stopped at a position where the light shielding door 32 of the film cartridge 3 is opened.

In the mechanism constructed as described above, when the cartridge chamber lid 2 is closed, the claw 251 is engaged with the locking portion 513 of the lock gear 51 as shown in FIG.
It is locked by. Figure 1 is a top view of this state.
7 Even if the cartridge chamber lid 2 is biased in the opening direction, while the pawl 251 is within the locking range of the locking portion 513,
The cartridge chamber lid 2 is closed.

When the operation of opening the cartridge chamber lid 2 is performed, the lock gear 51 meshes with the planet gear 181 and rotates in the direction C in the figure. When the pawl 251 exceeds the locking range of the locking portion 513, the locking is released, and the cartridge chamber lid 2 is opened. 18 and 19, the cartridge chamber lid 2 is shown in an open state.

Next, the light-shielding door opening / closing mechanism during the opening operation of the cartridge chamber lid 2 will be described. Figure 20
Then, the cartridge chamber lid 2 is in a closed state, and at this time, the light shielding door opening / closing driver 44 is in a position to open the light shielding door 32. The lock gear 51 locks the claw 251. Torque is generated in the light shielding door opening / closing driver 44 in the direction of arrow D by the springs 421 and 422, and is in contact with the X surface of the camera body 1.

When the lock gear 51 is rotated by the power transmission from the planetary gear 181, the gear 41, via the transmission shaft 52,
The gear 42 rotates in the arrow F direction. Gear 41 and gear 42
Are connected by an absorption spring 43. Since the absorption spring 43 does not extend in this operation, the gear 41 and the gear 42
Rotate together as one. Further, the light shielding door opening / closing driver 44 meshing with the gear 42 rotates in the direction of arrow E in the figure, and rotates in this state until one end of the gear 441 of the light shielding door opening / closing driver 44 contacts the Y surface of the camera body 1. FIG. 21 is a diagram in which one end of the gear 441 of the light shielding door opening / closing driver 44 is rotated until it abuts on the Y surface of the camera body 1. At this time, the light-blocking door opening / closing driver 44 operates the light-blocking door 32.
Is in a closed state, and the locking portion 513 of the lock gear 51 remains in a state in which the claw 251 is locked.

When the lock gear 51 is further rotated from this state, one end of the gear 441 of the light shielding door opening / closing driver 44 is in contact with the Y surface of the camera body 1, so that the light shielding door opening / closing driver 44 is further moved in the direction of arrow E. Does not rotate.
Since the gear 42 also meshes with the light-shielding door opening / closing driver 44, it does not rotate in the arrow F direction any more. Therefore, the absorption spring 43 between the gear 41 and the gear 42 extends, so that only the gear 41 rotates in the arrow F direction. for that reason,
The lock chamber 51 can be opened by rotating the lock gear 51 without moving the position of the light-shielding door opening / closing driver 44 to unlock the pawl 251.

In FIG. 22, the absorption spring 43 extends and the gear 41
Shows a rotated state. At this time, the claw 251 is disengaged from the locking portion 513 of the lock gear 51, and the cartridge chamber lid 2 can be opened as shown in FIGS. 18 and 19.

As described above, in this embodiment, when the operation for opening the cartridge chamber lid 2 is performed, the lock gear 51
The light-blocking door opening / closing driver 44 is driven to a position for closing the light-blocking door 32 by the rotation of the lock lever 51, and then the lock gear 51 is further rotated to lock the cartridge chamber lid 2 in the closed state. Unlock the cartridge chamber cover 2
Can be opened.

When the cartridge chamber lid 2 is closed, the springs 421 and 422 are charged as shown in FIG. Is driven to a position to open the lock gear 5 via the transmission shaft 52.
When 1 rotates in the counter C direction, it can be locked in the closed state.

The operation after the film cartridge is loaded in the camera of this embodiment will be described below. FIG. 23 is a flowchart applied to the camera of this embodiment.

First, when the user closes the cartridge chamber lid 2 from the opened state of the cartridge chamber lid 2 and detects that the camera is closed (# 1001), the cartridge chamber lid 2 is provided in the cartridge chamber. It is determined by the detection means (not shown) whether the film cartridge 3 is loaded (# 1002). If not, # 200
In order to set the cam 191 to the cartridge chamber lid opening phase, the cam switch 201 detects the phase of the cam 191. If it is the thrust phase, the cam 191 is rotated in the rewinding direction, and the cam 191 becomes the cartridge chamber lid opening phase. It is stopped at the open position (# 2002 to # 2004). After that, the cartridge chamber lid is opened and a standby state is set.

If it is determined in # 1002 that the film cartridge is loaded, the process proceeds to # 1003 and the cam 19
The state of 1 is detected. If it is in the thrust phase, the fork gear 23 is rotated in the winding direction, the data disk of the film cartridge is read by the winding rotation, and the usage status of the film is determined (# 1004 to # 1006).
If the cartridge is a photographable cartridge, the winding rotation is continued and the winding rotation is stopped when the first frame is set (# 1007 to # 1008). If it is not an image-capable cartridge, the winding rotation is stopped, the rewinding rotation is started, and the operation proceeds to the preparation operation for opening the cartridge chamber lid 2 (# 3006).

On the other hand, in the case of the cartridge opening phase, the fork gear 23 is rotated in the rewinding direction, the data disk of the film cartridge is read by the rewinding rotation, and the usage status of the film is determined (# 3001 to # 3001).
3003). If it is a photographic cartridge, after adjusting the cam to the thrust phase, the rewinding rotation is stopped and the winding rotation is performed. When the film is sent out from the cartridge and the first frame is set, the winding rotation is stopped (# 3004 to # 3005, # 1007 to # 100).
8). If the cartridge is not a photographable cartridge, the rewinding rotation is continued and the operation proceeds to the preparation operation for opening the cartridge chamber lid 2. As described above, in the camera to which the present embodiment is applied, the data disc reading operation method is switched depending on the state of the cam 191 when the cartridge is loaded.

When the photographing preparation operation is completed by the above method,
The shooting operation and one frame winding are performed, and when the shooting is completed or the rewind button is pressed, the rewind operation is started (# 1
009 to # 1012). When the film is stored in the cartridge, the data disk is aligned with the predetermined position to set the usage state of the film. If the cam 191 is not in the cartridge chamber cover opening phase when the setting is completed, the data disk is adjusted to the predetermined position again.
When the setting of the data disk and the phase setting of the cam 191 are thus completed, the rewinding rotation is stopped (# 101
3 to # 1015). In this state, the user waits until the user presses the cartridge chamber lid opening button. When the user presses the cartridge chamber lid open button, the cartridge chamber cover is rotated in the winding direction (# 1016 to # 1017). Already cam 1
Since 91 is set to the cartridge chamber lid opening phase, the rotation in this winding direction transmits power to the mechanism for opening the cartridge chamber lid. When it is detected that the cartridge chamber cover is opened, the rotation in the winding direction is stopped, and the cam 191 is set in the thrust phase by rotating in the rewinding direction (# 1018 to # 1021). At this time, the cartridge chamber lid is open and the film cartridge is ejected. Therefore, even if the feeding gear train is driven, the fork gear does not rotate, the phase of the data disk does not change, and the phase of the cam 191 is changed. Can be changed. When this phase setting is completed, the rewinding rotation is stopped (#
1022), and waits with the cartridge chamber cover opened.

In the series of operations of the camera as described above, the rewinding operation is performed after the winding operation # 300.
In each step shown by 6, # 1012, and # 1020, when the phase of the cam 191 is the cartridge chamber cover opening phase, the restriction releasing operation as shown in FIGS. Therefore, when the rewinding operation is performed after the winding operation, the restriction by the cam lever 202 is released regardless of the phase of the cam 191.

[0036]

As described above, in the camera to which the present invention is applied, the camera is provided with the drive source and the feeding gear train for transmitting the power for rotating the spool shaft of the film cartridge. A planetary gear provided for power switching is provided in the train, and the planetary gear is in a first position where the planetary gear stops, a second position, and an operating range between the first position and the second position. The third gear has a third position where the gear meshes with a transmission drive gear that is a power output destination, and the planetary gear restricts the movement from the first position to the second position. Since the operation of the planetary gear is regulated in the above, in the third position where the planetary gear meshes with the transmission drive gear, the revolution force of the planetary gear increases to reliably move the planetary gear and to reliably switch the power. To transmit power to the destination Can.

[Brief description of drawings]

FIG. 1 is a front view of a camera to which a first embodiment of the present invention has been applied.

FIG. 2 is a perspective view of a camera to which the first embodiment of the present invention has been applied.

FIG. 3 is a diagram of a film cartridge used in the present invention.

FIG. 4 is a view of a cartridge chamber lid of a camera to which the first embodiment of the invention is applied.

FIG. 5 is a view of a cartridge chamber cover of a camera to which the first embodiment of the invention is applied.

FIG. 6 is a bottom view of the camera to which the first embodiment of the invention is applied.

FIG. 7 is a bottom view of a camera to which the first embodiment of the invention is applied.

FIG. 8 is a bottom view of a camera to which the first embodiment of the invention is applied.

FIG. 9 is a bottom view of a camera to which the first embodiment of the invention is applied.

FIG. 10 is a bottom view of a camera to which the first embodiment of the invention is applied.

FIG. 11 is a bottom view of a camera to which the first embodiment of the invention is applied.

FIG. 12 is a bottom view of a camera to which the first embodiment of the invention is applied.

FIG. 13 is a perspective view of a switching lever 202 of a camera to which the first embodiment of the present invention has been applied.

FIG. 14 is a perspective view of a switching lever 202 of a camera to which the first embodiment of the invention is applied.

FIG. 15 is a perspective view of a camera to which the first embodiment of the invention is applied.

FIG. 16 is a perspective view of a camera to which the first embodiment of the invention is applied.

FIG. 17 is a view of the cartridge chamber lid of the camera to which the first embodiment of the invention is applied.

FIG. 18 is a perspective view of a camera to which the first embodiment of the present invention has been applied.

FIG. 19 is a view of the cartridge chamber lid of the camera to which the first embodiment of the invention is applied.

FIG. 20 is a diagram of a light blocking door opening / closing mechanism of a camera to which the first embodiment of the invention is applied.

FIG. 21 is also a diagram of a light-shielding door opening / closing mechanism of a camera to which the first embodiment of the invention is applied.

FIG. 22 is a view of a light blocking door opening / closing mechanism of a camera to which the first embodiment of the invention is applied.

FIG. 23-1 is a flowchart showing the operation of the camera to which the first embodiment of the present invention has been applied.

FIG. 23-2 is a flowchart showing the operation of the camera to which the first embodiment of the present invention has been applied.

[Explanation of symbols]

1 camera body 2 Cartridge chamber lid 3 film cartridge 10 motors 11-19 Feeding gear 23 fork gear 43 absorption spring 44 Light-shielding door open / close driver 51 Lock gear (locking mechanism for closing the cartridge chamber lid) 181, 182 Planetary gear 201 cam switch 202 Switching lever (restriction means) 202a Rotating claw (regulation releasing means)

Continued front page    F term (reference) 2H020 DD00 DD08 MA03 MA04 MC02                       MC11 MC15 MC16 MC18 MC28                       MC32 MC35 MC41 MC71 MC78                       MC92 MC94 MC96 ME01                 2H100 AA71 BB05 BB06                 3J062 AA36 AB01 AC01 CG01 CG75

Claims (10)

[Claims] 1. A camera comprising a drive source and a feed gear train for transmitting power for rotating a spool shaft of a film cartridge, wherein a planet gear for switching power is provided in the feed gear train. A first position where the planetary gear stops, a second position, and a first position where the planetary gear meshes with a transmission drive gear that is a power output destination within an operating range between the first position and the second position. A restriction unit that restricts the movement of the planetary gear from the first position to the second position, and that restricts the operation of the planetary gear at the third position. Power switching device for cameras. 2. The power switching device for a camera according to claim 1, wherein the restricting unit is operated by an operation of the feeding gear train. 3. The power switching device for a camera according to claim 1, wherein the restricting unit is operated by a cam-shaped operation provided on a gear in the feeding gear train. 4. The restriction means includes restriction cancellation means for canceling restriction of movement of the planetary gear from the second position to the first position.
3 is a camera power switching device. 5. The power switching device for a camera according to claim 1, wherein the film rewinding operation is performed at the first position, and the film winding operation is performed at the second position. 6. The power switching device for a camera according to claim 1, wherein the transmission drive gear transmits power to a light-blocking door opening / closing mechanism that opens / closes a light-blocking door of the film cartridge. 7. The power switching of the camera according to claim 1, further comprising control means for controlling the operation of the drive source based on a signal of a detection means for detecting a state of the regulation means. apparatus. 8. The power switching device for a camera according to claim 7, wherein the detection means is composed of a switch having elasticity, and biases the regulation means. 9. The planetary gear and the restriction means are arranged on the lower surface side of the camera.
8. The power switching device of the camera according to 8. 10. The power switching device for a camera according to claim 1, wherein the drive source is arranged inside a spool for winding up the film.