JP3152565B2 - camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a cartridge chamber lid for shielding a cartridge chamber, and an operating member for opening and closing the cartridge chamber lid, and winds up a film through a film feeding gear train. And a camera for rewinding.

[0002]

2. Description of the Related Art A camera is provided with a cartridge chamber cover (so-called back cover, back cover) for shielding a film cartridge after the film cartridge is loaded in the camera.

Here, if the cartridge chamber lid is opened carelessly while the camera is loaded with a film cartridge and the film is being wound,
If it is a silver halide film, it will be exposed. Therefore, several methods have been conventionally proposed to prevent an erroneous opening operation of the cartridge chamber lid when the film is being pulled out. For example, when the film is exposed when the cartridge chamber lid is opened, the lock member is engaged with the cartridge chamber lid or the cartridge chamber lid locking member by the movement of a magnetic actuator or the movement of a dedicated motor. There is a way to stop and not open.

Further, in order to prevent an erroneous operation of the cartridge chamber lid opening / closing switch only when the film is in a winding state, a rewind switch and a cartridge as disclosed in Japanese Patent Application Laid-Open No. 63-25634 are disclosed. There has been a method in which a chamber lid open switch is provided in parallel to make it difficult to press the cartridge chamber lid open switch unless the rewind switch is pressed.

[0005]

However, in the above conventional method, when the film loaded in the camera is exposed to light when the cartridge chamber lid is opened, there is a method for locking the cartridge chamber lid so that the cartridge chamber lid is not accidentally opened. Requires a dedicated electric or magnetic actuator for moving the lock member, which increases the cost, consumes extra electric energy to operate the actuator, and a space for incorporating the actuator. Has to be provided in the camera.

In the camera proposed in Japanese Patent Application Laid-Open No. 63-25634, a method of making it difficult to press the cartridge chamber lid open switch unless the rewind switch is depressed is to set the rewind switch immediately adjacent to the cartridge chamber lid open switch. The cartridge compartment lid open switch must be installed only by the friction between the surface of the cartridge compartment lid open switch and the fingertip. In the case of dropping, etc., there was only a cartridge chamber lid opening reliability similar to that of a conventional camera in which a film rewind switch was not provided along with the cartridge chamber lid. Furthermore, the cartridge chamber lid open switch and the rewind switch must be provided side by side, rather than having the user unconsciously operate the rewind switch, making opening and closing the cartridge chamber lid of the camera difficult. There was a risk of doing it.

(Object of the Invention) A first object of the present invention is to provide a cartridge which is inadvertently operated even if an operation member of a camera user is improperly operated, vibration is applied to the camera, or the camera is dropped. An object of the present invention is to provide a camera capable of preventing a film from being damaged due to opening of a chamber lid with a simple configuration.

A second object of the present invention is to prevent the cartridge chamber cover from being opened by an inadvertent operation of the operation member by the camera user, and to provide a light-shielding plate on the film drawn from the film cartridge. An object of the present invention is to provide a camera which can prevent the film from being damaged by contact.

A third object of the present invention is to operate the film feed gear train to move the lock member from the second position to the first position, and to operate the cartridge chamber lid claw receiving member via the operating member. An object of the present invention is to provide a camera capable of setting the cartridge chamber lid to an inoperable state again only by moving the cartridge chamber to a position where it engages with the lock member.

[0010]

According to the first aspect of the present invention, a rotational force is obtained from a part of the gears of the film feeding gear train, and the first rotational direction of the film feeding gear train is applied to the first rotating direction. When part of the gears is rotating, the partial gears rotate in a first position in a second rotation direction opposite to the first rotation direction of the film feeding gear train. a locking member to be moved respectively in the second position when in, when the cartridge chamber lid is claw receiving portion in the closed state enters the moving locus of the locking member, the locking member is moved to said first position A cartridge chamber lid pawl receiving member that engages the pawl portion of the lock member and the pawl receiving portion and disables the opening operation of the operating member, and some gears of the film feeding gear train are provided. No.
By rotating in the rotation direction of 1 , ie, in the film winding direction, the lock member is engaged with the cartridge chamber claw receiving member, so that the operation member cannot be opened.

According to a second aspect of the present invention, in the first rotation direction of the film feeding gear train, the partial gears obtain a rotational force from some gears of the film feeding gear train. When rotating, the film feed gear train is in the first position.
Wherein with the first rotational direction when the portion of the gear in a second rotational direction opposite direction is rotated providing a locking member to be moved <br/> respectively to the second position, the cartridge chamber lid the claw receiving portion claw portion of the lock member when said locking member in the closed state is moved to the first position engages enters provided, a part of the gear of the film transport gear train first
By rotating in the rotation direction of 1 , ie, in the film winding direction, the lock member engages with the cartridge chamber lid,
Regardless of the opening operation of the operation member, the cartridge chamber lid is set to the inoperable state.

According to a third aspect of the present invention, there is provided a film cartridge which moves in conjunction with a cartridge chamber lid pawl receiving member and moves to a state where the cartridge chamber lid pawl receiving member is locked by a lock member. of the light shielding plate provided in film entrance, the light shielding plate opening and closing member for locking to a state that does not work only within an extent that does not contact with at least a film from the closed state is provided, a portion of the film feed gear train gear first By rotating in the rotation direction, that is, in the film winding direction, the opening operation of the operation member cannot be performed,
The light-shielding plate is moved only within a range where the light-shielding plate does not come into contact with the film, or is locked so that it does not move from the open state.

According to a fourth aspect of the present invention, the lock member is provided with an idler interlocking with a part of the gears of the film feeding gear train.
And star plate, and rotatably integral claw portion at the tip of the planetary plate, said constitutes the claw portion against the planetary plate elastic portion for urging in one direction, the locking member cartridge If the cartridge chamber lid is opened due to a camera drop or the like in a position where it engages with the chamber lid claw receiving member, the cartridge chamber lid claw receiving member is moved to move the claw portion against the elastic portion. By rotating, the cartridge chamber lid claw receiving member is positioned to be engaged with the lock member again.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

FIGS. 1 to 5 show a camera according to a first embodiment of the present invention. More specifically, FIG. 1 shows a structure of a main part of the camera (a mechanism for feeding a film, a lid for a cartridge chamber). FIG. 2 is a perspective view showing a part of the film feeding mechanism shown in FIG. 1, and FIG. 3 is a perspective view showing a part of the film feeding mechanism shown in FIG. FIG. 4 is an exploded perspective view showing a part of the lock mechanism, and FIG. 4 is an exploded perspective view of the cartridge chamber lid and the like shown in FIG.

First, a film feeding gear train (film feeding mechanism) will be described with reference to FIGS.

1 is a pinion gear integrated with an electric key (not shown), and 2 and 3 are reduction gears (see FIG. 1). 5 is 3
The stage is a sun gear, in which an upper stage is provided with a small gear 5a, an intermediate stage is provided with a large gear 5b receiving power from the speed gear 3, and a lower stage is provided with a small gear 5c. Reference numeral 7 denotes a planetary gear that meshes with the large gear 5b of the sun gear 5, transmits power to a spool gear 4 provided on a spool (not shown) at a first position, and transmits power to any gear at a second position. Not transmitting. Reference numeral 6a denotes a planetary plate which keeps the axis between the sun gear 5 and the planetary gear 7 and the planetary gear 7 is rotatably held around the sun gear 5; 6c receives rotation of the planetary plate 6a; Is a stop for holding the planetary gear 7 at the position of.

Reference numeral 10 denotes a planetary gear which meshes with the small gear 5c of the sun gear 5, which is in a state where power is not transmitted to any gear at a first position, and which is a one-way clutch gear 12 described later at a second position. To transmit power. 6b is a planetary plate which keeps the axis between the sun gear 5 and the planetary gear 10 and which is rotatably held around the sun gear 5;
A stop 6d (see FIG. 2) receives the rotation of the planetary plate 6b and holds the planetary gear 10 at the first position. A stop 9 always meshes with the small gear 5a of the sun gear 5 to supply power in one direction described later. The gear is transmitted to the clutch gear 11. Reference numeral 11 denotes a one-way clutch gear integrated with the shaft, which is provided with a one-way clutch 13 and rotatably provided with a one-way clutch gear 12 when the one-way clutch 13 is in a sliding state.

Reference numeral 14 denotes a gear that meshes with the one-way clutch 12 and transmits power to the connecting gear 15. Reference numerals 15 and 16 denote power transmitted from the gear 14 from the camera bottom to the camera upper via a shaft integrated with these gears. A gear 17 for meshing with a connecting gear 16 and transmitting power to a fork gear 18 described later, and a gear 18 for meshing with a spool end of a film cartridge 200 described later and a fork 19 for feeding a film. It is a fork gear provided. Reference numeral 300 denotes a cartridge chamber, which is formed in a space between the fork gear 18 described above and a cartridge chamber lid 20 described later.

Next, a mechanism for locking the locking member of the cartridge chamber lid will be described with reference to FIGS.

Reference numeral 25 denotes a planetary gear that meshes with the connection gear 15. The connection gear 15 is used as a sun gear in a first position in a lock position for locking a cartridge chamber cover claw 21 d described later, and in a second position. In this state, the lock of the cartridge chamber lid claw portion 21d is released. Reference numeral 26 denotes a planetary plate which keeps the axis between the connection gear 15 and the planetary gear 25 and which is rotatably held around the connection gear 15 using the connection gear 15 as a sun gear. Is provided with a lock portion for locking a later-described cartridge chamber lid claw portion 21d. Reference numeral 28 (see FIG. 3) is a rotation axis of the planet gear 25, and an axis for rotatably fixing the planet gear 26 to the planet plate 26. Reference numeral 29 is for providing a frictional force between the planet gear 25 and the planet plate 26. The spring 27b stops the movement of the end 28a of the shaft 28 due to the rotation of the planet plate 26, and stops the planetary gear 25 at the first position. The spring 27b also moves the planetary gear 25 to the second position. It is a stop part to hold in.

Next, the structure of the cartridge chamber lid will be described with reference to FIGS.

Reference numeral 20 denotes a cartridge chamber cover which forms one end of the cartridge chamber 300 while shielding the cartridge chamber 300, and 21 (see FIG. 4) denotes a cartridge chamber lid claw receiving member, which opens and closes the cartridge chamber 300. Chamber opening / closing knob 21c, and a spring 22 described later
21b holding cartridge, cartridge chamber lid claw receiving part 2
1d, an elastic portion 21a that locks the cartridge chamber lid claw receiving portion 21d at the cartridge chamber open position.

Here, the cartridge chamber opening / closing knob 21c is exposed to the outside through the opening 20b of the cartridge chamber lid 20, and can be operated from outside the camera.
The elastic portion 21a is provided with a cartridge chamber opening / closing knob 21c.
The latching portion 20a of the cartridge chamber lid 20 latches the cartridge chamber lid 20 to hold the cartridge chamber lid claw receiving member 21 at the open position.

Reference numeral 22 denotes a case where the locking of the open position of the cartridge chamber lid pawl receiving member 21 is released by the above-mentioned elastic portion 21a being flipped by the entry of the protruding portion 30 provided on the camera body side. And a spring for urging the cartridge chamber lid claw receiving member 21 to the closed position. Reference numeral 23 denotes a plate for accommodating the cartridge chamber lid claw receiving member 21 in the cartridge chamber lid 20. The plate 23 has a hole 23a so that the projection 30 can enter. Reference numeral 24 denotes a screw for fixing the plate 23 to the cartridge chamber lid 20.

FIGS. 5 (a), 5 (b) and 5 (c) are perspective views showing the appearance of the camera having the above-mentioned structure according to the first embodiment of the present invention and the state when a film cartridge is loaded into the camera. It is.

In FIG. 5, reference numeral 100 denotes a camera body;
Reference numeral 0 denotes a film cartridge, reference numeral 20 denotes the above-described cartridge chamber cover at the bottom of the camera, and reference numeral 21c denotes the above-described cartridge chamber opening / closing knob.

When the film cartridge 200 is loaded into the camera, first, the cartridge chamber opening / closing knob 21c provided on the cartridge chamber lid 20 at the bottom of the camera is slid in the opening direction to open the cartridge chamber opening / closing knob 21c.
c and the cartridge chamber lid claw receiving member 21 (FIG. 5)
5 is pulled out from the camera body 100 side, that is, latched into the inside of the cartridge chamber lid 20, and FIG.
The cartridge chamber lid 20 is opened as shown in FIG.

Next, the cartridge chamber 30 exposed to the outside
0 is completely loaded with the film cartridge 200, and the cartridge chamber cover 20 is completely closed again. Then, the cartridge chamber lid claw receiving member 21 provided in the cartridge chamber lid 20 enters the camera main body 100, and the cartridge chamber lid 20 is locked to the camera main body 100 as described later.

Next, the operation of the film feeding gear train will be described. Note that, in the camera having the film feeding gear train shown in FIG. 1 according to the present embodiment, a film cartridge of a type in which the film is completely stored in the film cartridge in an unexposed initial state is used.

A film cartridge 20 of the type described above
When 0 is completely loaded into the cartridge chamber 300 of the camera body 100, the fork gear 18 shown in FIG. 1 is rotated in a direction (first direction) for sending out the film from the inside of the film cartridge 200. As a result, the film passes in front of the aperture (not shown) of the camera, and the film winds around the spool gear 4 provided on the rotating camera-side spool. Then, thereafter, the gear train is automatically switched so that the film is wound up by the spool gear 4 side, and the rotational force of the fork gear 18 is not transmitted to the film.

When the film is rewound, the fork gear 18 is reversed (second direction), and the gear train is automatically switched so that the rotational force of the spool gear 4 on the camera side is not transmitted to the film. The fork gear 18
Turns the spool in the film cartridge 200 through the fork 19 to rewind the film.

The operation of the film feed gear train at the time of film winding and film rewinding will be described in detail below.

First, when the film is wound, the pinion gear 1 rotates in the first direction (in the direction of the solid arrow in the drawing) when the film is wound, and the power of the pinion gear 1 is supplied to the sun via the reduction gears 2 and 3. It is transmitted to the gear 5. The sun gear 5 rotating in the solid arrow direction rotates the planetary gear 7 to the first position so as to mesh with the spool gear 4 of the spool (not shown), and transmits the power to the planetary gear 10 to any gear. Rotate to the first position where not. (At this time, a stop member for stopping the planetary plate 6a at an appropriate position may be provided so that the planetary gear 7 does not bite the spool gear 4 on the camera side.) Further, the gear 9 always meshing with the sun gear 5 Transmits the power to the one-way clutch gear 11 and generates a rotational force in the direction of the solid arrow. At this time, the one-way clutch gear 12 transmits the rotational force of the one-way clutch gear 11 in the direction of the solid arrow by the engagement of the one-way clutch 13 (see FIG. 2).

The rotational force of the one-way clutch gear 12 is transmitted to the fork gear 18 having the fork 19 via the gear 14, the connecting gears 15, 16 and the gear 17, and rotates the fork gear 18 in the direction of the solid arrow. Help. At this time, since a spool end (not shown) provided in the film cartridge 200 and the fork 19 are engaged,
As described above, the film is fed out from the film cartridge 200.

Thereafter, the film sent out from the film cartridge 200 passes through the camera-side aperture, and is provided with a spool on the camera side provided with the spool gear 4 rotating in the direction indicated by the solid line (of course, the spool rotates in the same direction as the spool gear 4). ). When the film is completely wound around the camera side spool, the film is drawn into the camera side spool because the winding speed of the outer periphery of the camera side spool is faster than the feed speed of the outer periphery of the spool in the film cartridge 200. The film cartridge 2
The rotation speed of the spool in 00 is increased, and the fork gear 18 is further accelerated and rotated in the direction of the solid arrow. The rotation force is the gear 17, the connecting gears 16, 15, the gear 1
4, the rotation speed of the one-way clutch gear 12 becomes higher than that of the one-way clutch 11, and the clutch 13 is disengaged (the power of the one-way clutch gear 11 is 12), and the fork gear 18 rotates depending on the speed of the film wound up without hindering the rotation of the camera-side spool.

When the film is rewound, the pinion gear 1 reverses in the second direction (in the direction indicated by the dashed arrow in the drawing), and transmits power to the sun gear 5 as in the case of film winding. The rotating sun gear 5 in the direction of the dashed arrow rotates the planetary gear 7 to a second position that does not transmit power to any gear, and
The planetary gear 10 is rotated to a second position for transmitting power to the one-way clutch gear 12. (At this time, a stop may be provided to lock the planetary plate 6b so that the planetary gear 10 does not bite into the clutch gear 12.) At this time, power is also transmitted from the gear 9 to the one-way clutch gear 11, In FIG. 1, the one-way clutch gear 12 rotates faster than the one-way clutch gear 12, but the clutch 13 is disengaged and the gear 14 rotates.
Is the power from the planetary gear 10, that is, the one-way clutch 1
Only the turning force of 2 will be transmitted.

The power transmitted to the gear 14 is transmitted to the fork gear 18 via the connecting gears 15 and 16 and the gear 17.
Is rotated in the direction of the dashed arrow. Therefore, the rotational force is transmitted to the spool in the film cartridge 200 via the fork 19, and the film is rewound, that is, drawn into the film cartridge 200. At this time, the camera-side spool can rotate independently of the speed of the film to be rewound without obstructing the rotation of the spool in the film cartridge 200.

The foregoing has described a film feed gear train suitable for using a film cartridge of a type in which the film is completely contained in the film cartridge (including the film leader portion). Is slightly exposed in the unexposed initial state, even if the film feed gear train can be used only with a film cartridge of a commercially available type, the first direction is used during film winding, and the reverse direction is used during film rewinding. If there is a gear that rotates in the second direction, there is no practical problem.

Next, the operation of the lock mechanism and the cartridge chamber lid will be described with reference to FIGS. 1, 3 and 4.

As described above, the connection gear 15 rotates in the first direction indicated by the solid arrow when the film is wound, and in the second direction indicated by the broken arrow when the film is rewound. At the time of film winding, the planetary gear 25 rotates around the connection gear 15 serving as a sun gear, the shaft end 28a integrated with the planetary gear 25 is locked by the stopper 27b, and the planetary plate 26 is moved. It is carried to the first position in the direction of the solid arrow (see FIG. 1). At this time, the cartridge chamber lid claw receiving member 2
1 is that when the cartridge chamber lid 20 is completely closed, the protrusion 30 provided on the camera body 100 side is elastically deformed.
1 (because it is bent inward), the tip of the cartridge chamber lid 20 is protruded from the cartridge chamber lid 20 by the bias of the spring 22 as shown in FIG. In the state of being.

Accordingly, when the film cartridge 200 is loaded in the cartridge chamber 300 and the film winding is started, the coupling gear 15 rotates in the first direction indicated by the solid arrow as described above, so that the planetary plate 26 is also rotated. Pivot in the direction
The (end of) the planetary plate 26 is the cartridge chamber lid claw receiving portion 21.
d, the cartridge chamber cover opening / closing knob 21c is externally provided while the camera is in the film winding state.
It becomes impossible to operate.

Therefore, it is possible to prevent the cartridge chamber 300 from being opened by inadvertently moving the cartridge chamber cover opening / closing knob 21c to the open position and exposing the film during use of the camera. In addition, since the planetary gear 25 is subjected to the frictional force of the spring 29, the planetary gear 25 is not easily rotated around the connecting gear 15 due to dropping, vibration, or the like. Has become.

The camera detects completion of film winding,
Alternatively, when the film rewinding is started by the forced rewinding switch or the like, the planetary gear 25 rotates around the connecting gear 15 in the direction of the dotted arrow in FIG.
The shaft end 28a integrated with the planetary gear 25 is a stopper 27a.
And the planet plate 26 also rotates in the
Transported to the location. In other words, by performing the film rewind rotation, the cartridge chamber lid claw receiving portion 21d and the planetary plate 2
6 is released, and the planetary plate 26 returns to the initial position (second position).

Accordingly, by moving the cartridge chamber cover opening / closing knob 21c to the open position against the bias of the spring 22 from outside the camera, the elastic portion 21a of the cartridge chamber cover claw receiving member 21 is engaged with the cartridge chamber cover 20. The stopper 20a locks the cartridge chamber lid 20 so that the cartridge chamber lid 20 can be opened as shown in FIG.

The operation of the lock mechanism of the cartridge chamber cover 20 described above is automatically performed in conjunction with the above-described film feeding gear train, so that the operation itself of opening and closing the cartridge chamber cover 20 is not troublesome. It is certain. Also,
Since the lock mechanism does not require a dedicated actuator, the cost is low, and erroneous opening of the cartridge chamber lid can be prevented with simple and small parts.

(Second Embodiment) FIG. 6 is an exploded perspective view of a cartridge chamber cover and the like provided in a camera according to a second embodiment of the present invention.

Parts having the same functions as in the first embodiment are denoted by the same reference numerals, and description thereof is omitted here for simplicity. Further, the film feeding gear train of the camera and the locking mechanism of the cartridge chamber cover are the same as those in the first embodiment, so that their illustration is omitted, but the same reference numerals are used in the description.

This embodiment shows an example of the cartridge chamber lid 20 which can be adapted to a case where a protrusion engaging with the cartridge chamber lid claw receiving portion cannot be provided due to the camera structure. The recessed portion (claw receiving portion) 20 c is provided for locking the cartridge chamber cover 20 when the planetary plate 26 enters simultaneously with film winding. That is, it corresponds to the cartridge chamber lid claw receiving portion 21d in the first embodiment.

When the planet plate 26 shown in FIG. 1 or the like enters the recess 20c, even if the cartridge chamber cover opening / closing knob 21c is moved to the open position by the external operation against the bias of the spring 22, the planet plate 26 Acts as a claw for locking the cartridge chamber cover 20 to the camera body 100, so that the cartridge chamber cover 20 cannot be opened as in the first embodiment.

The cartridge chamber lid opening / closing knob 21c
Can be moved to the open position, but the camera body 1
Since the protruding portion 30 provided on the side of the cartridge chamber 100 has entered the cartridge chamber cover 20, the elastic portion 21a is always flipped, and the latch portion 20a provided on the cartridge chamber cover 20 latches. The cartridge 22 is returned to the cartridge chamber lid closing position again according to the bias of the spring 22 (when the operation of the cartridge chamber lid opening / closing knob 21c is stopped). When the film is rewound, the planet plate 26
(In the direction of the dashed arrow in FIG. 1), the cartridge chamber lid 20 can be opened.

(Third Embodiment) FIGS. 7 and 8 are views of a camera according to a third embodiment of the present invention. FIG. 7 is an exploded perspective view of a cartridge chamber lid and the like provided in the camera. 8 (a), (b) and (c) are views showing the movement of the cartridge chamber lid and the like.

The parts having the same first and second functions are denoted by the same reference numerals. The film feeding gear train of the camera and the lock mechanism of the lid of the cartridge chamber are the same as those in the first embodiment, so that their illustration is omitted here, but the same reference numerals are used in the description.

The cartridge chamber cover 20 is provided with a light-shielding plate (light-shielding plate) for shielding the opening in which the film is completely accommodated in the film cartridge in the initial unexposed state and in which the film enters and exits the film cartridge. Window cartridge (for example, Japanese Patent Application No. 3-116136 or U.S. Pat. No. 4,938,429).
(Disclosed in Japanese Patent Application Laid-Open No. H10-19764).

In FIG. 7, reference numeral 20 denotes a cartridge chamber 30.
0 is a cartridge chamber lid that forms a first end face of the cartridge chamber while shielding 0. Reference numeral 21 denotes a cartridge chamber lid claw receiving member for locking the cartridge chamber lid 20 to the camera body 100, and an elastic portion 21a is formed on the back surface of the cartridge chamber lid claw receiving member 21. This is not shown in FIG. Is moved by the opening operation of the cartridge chamber lid opening / closing knob 21c, and is latched by the locking portion 20a. At the tip of the cartridge chamber lid pawl receiving member 21, the cartridge chamber lid pawl receiving section 21d which is engaged with the planetary plate 26, on one side, the rack 21e, and the cartridge chamber lid pawl receiving member 21 are urged in the closing direction. Arm 21b on which a spring 22 is mounted.

Reference numeral 31 denotes a driver gear for opening and closing the light shielding plate of the film cartridge (not shown). The gear 31 meshes with the rack 21e and cooperates with the movement of the rack 21e. It has a driver portion 31b that engages and opens and closes the light shielding plate by its rotational movement. 30 is the camera body 10
0 is a protrusion provided on the cartridge chamber lid 20.
When the cartridge is completely closed, it enters the cartridge chamber lid 20 and flips (bends inward) the elastic portion 21a locked by the locking portion 20a of the cartridge chamber lid claw receiving member 21, thereby causing the cartridge chamber lid claw to move. The receiving member 21 is projected from the camera body 100, and the cartridge chamber cover 20 is locked to the camera body 100. 23 is a cartridge chamber lid claw receiving member 21
And the spring 22 and the driver gear 31 with the cartridge chamber lid 2
Reference numeral 24 denotes a plate for storing the plate 23 in the cartridge chamber lid 20.

When the film cartridge is in the cartridge chamber 3
8A, the moment when the cartridge chamber cover 20 is about to be completely closed is shown in FIG.
In this state, the cartridge chamber lid claw receiving portion 21d is housed in the cartridge chamber lid 20, and the elastic portion 21d is still in place.
is latched by the locking portion 20a of the cartridge chamber lid 20, and the spring 22 is charged. Also,
The gear portion 31b of the driver gear 31 has a light shielding plate of a film cartridge (not shown) still closed, and
The planet plate 26 is also retracted to the second position in the film rewinding state.

Here, S is the cartridge chamber lid claw receiving member 2
1 is a switch for detecting entry into the camera body 100. In this state, the switch is open.

FIG. 8B shows the moment when the cartridge chamber cover 20 is completely closed. In this state, FIG.
The projection 30 provided on the camera body 100 enters the location 30a shown in FIG.
By repelling 1a, the cartridge chamber lid pawl receiving member 21 gets over the locking portion 20a and projects from the cartridge chamber lid 20 by the urging force of the spring 22. At this time, the cartridge chamber lid claw receiving portion 21d enters the camera main body 100, the cartridge chamber lid 20 is locked on the camera main body 100 side, and at the same time, the rack 21e turns the gear 31a of the driver gear 31 to turn the driver portion 31b. The light-shielding plate of the film cartridge is opened through the opening.

On the other hand, the cartridge chamber lid claw receiving member 21 that has entered the camera body 100 presses the switch S to turn it on, and the various operations of the camera indicate that the cartridge chamber lid 20 completely shields the cartridge chamber 300. To the microcomputer 400 that controls Then, the microcomputer 400
Starts winding the film through the film feeding gear train assuming that the film cartridge is completely housed in the cartridge chamber 300 and the cartridge chamber 300 is completely shielded.

FIG. 8 shows the state after the film winding has begun.
(C). When the connecting gear 15 which is a part of the film feeding gear train starts winding and rotating, the planetary gear 25 and the planetary plate 26 rotate around the connecting gear 15 as described in the first embodiment, and the cartridge Room lid nail receiving part 21d
Move to the first position to lock the.

Therefore, since the cartridge chamber lid pawl receiving member 21 remains locked as long as the camera winds the film, the cartridge chamber lid opening / closing knob 21c (not shown)
Cannot be moved by the external operation of the camera, that is, the driver gear 31 is rotated by the inadvertent movement of the cartridge chamber opening / closing knob 21c of the camera in the film winding state, and the film is damaged by the light shielding plate of the film cartridge and erroneously. Cartridge chamber lid 20
Can be prevented from being exposed due to the opening of the aperture.

Thereafter, when the winding of the film is completed or the information of the forced rewind is input to the microcomputer 400, the microcomputer 400 starts to rewind the film via the film feeding gear train. In this case, the state is as shown in FIG.

When the rewinding of the film is started, the state is changed from the state shown in FIG. 8C to the state shown in FIG. 8B, and the planetary plate 26 is released from the engagement with the claw receiving portion 21d of the cartridge chamber lid again. Move to the second retracted position.

In this state, it is possible to carelessly move the cartridge chamber cover opening / closing knob 21c. However, in a general camera, the warning that the automatic rewinding operation starts is performed by displaying the number of exposure plates of the camera, and the probability that the camera user is informed in advance that film rewinding is performed is not likely to occur. high. In addition, the film is also rewound by the camera user's will, such as "forced rewind" .In other words, the fact that it is in "rewind operation" means that the vibration caused by the rewind operation of the film feed gear train is caused by sound. In addition to the above, the probability that the cartridge chamber cover opening / closing knob 21c is inadvertently opened without any knowledge of the camera user is low. Therefore, there is almost no possibility that the cartridge chamber cover opening / closing knob 21c is inadvertently moved during film rewinding to expose the film.

Thereafter, when the film is completely rewound into the film cartridge, the user moves the cartridge chamber cover opening / closing knob 21c to the open position. Then, in conjunction with this, the driver gear 31 engaged with the rack 21e rotates again, and rotates the light shielding plate of the film cartridge to the closed position. Thus, the cartridge chamber lid claw receiving member 21 is again latched in the cartridge chamber lid 20 as shown in FIG. 8A, and then the cartridge chamber lid 20 is opened so that the film cartridge can be taken out of the cartridge chamber 300.

(Fourth Embodiment) FIGS. 9 and 10A,
9 (b) and 9 (c) are views of a camera according to a fourth embodiment of the present invention. FIG. 9 is an exploded perspective view of a lock mechanism for locking a cartridge chamber lid, and FIG. FIG.

Parts having the same functions as in the first embodiment are denoted by the same reference numerals. Further, the film feeding gear train is the same as that of the first embodiment, so the description is omitted, and the cartridge chamber lid is the same as that of the first embodiment (FIG. 4) or the third embodiment except for the shape of the cartridge chamber lid claw receiving portion 21d. Since any of the embodiments (FIG. 7) may be used, only a part thereof is shown.

In FIG. 9, reference numeral 15 denotes a connecting gear in the feeding gear train, 16 denotes a connecting gear for transmitting power from the bottom of the camera to the upper part integrally with the connecting gear 15, and 25 meshes with the connecting gear 15 to rotate around the connecting gear 15. This is a planetary gear that can rotate.
Reference numeral 28 denotes a rotation shaft of the planetary gear 25, which applies a frictional force to the planetary gear 25 by sandwiching a spring 29 therebetween. Reference numeral 31 denotes a planetary plate which holds the planetary gear 25 while maintaining the center between the coupling gear 15 and the planetary gear 25, and is rotatable about a shaft 34, which is biased in one direction by a spring 33 at a tip thereof. A member 32 is provided. 31a and 32a are locking portions for locking the spring 33, and 31b is a stopping portion for stopping rotation of the claw member 32.

In the above configuration, when the film feed gear train is in the film winding state, the planetary plate 31 locks the cartridge chamber lid claw receiving portion 21d (see FIG. 10) in the solid arrow direction (see FIG. 9). And the shaft end 28a is held by the stopper 27b and stops at the first position. When the film feed gear train is in the film rewinding state, the planetary plate 32
Rotates in the direction of the dashed arrow releasing the locking of the cartridge chamber lid claw receiving portion 21d, and the shaft end 28a is held by the stopper portion 27a and stops at the second position.

In the mechanism of the fourth embodiment described above, if the claw member 32 of the lock mechanism is used,
In the state in which the cartridge chamber lid comes off from the cartridge chamber lid claw receiving member 21d in the state where the cartridge chamber lid claw is in the locking position of FIG. The claw member 32 can be locked to the receiving portion 21d.

This is because, for example, when a film cartridge equipped with telem is installed at the film entrance and exit of the film cartridge, if the cartridge chamber cover 20 is opened due to the camera falling down in the film winding state, etc. In the first and third embodiments, if the film feed gear train is once rotated in the rewind direction to retract the lock mechanism, the cartridge chamber lid claw receiving portion 21d must be re-entered into the camera body 100. If the unexposed film remains in the film cartridge, it will be wasted.

The fourth embodiment solves the above problem, and the operation at this time will be described with reference to FIG.

FIG. 10A shows a state in which the cartridge chamber cover 20 is opened due to a camera drop or the like in the film rewinding state. In this state, the claw member 32 is engaged with the locking portion. The stop portion 31 of the planetary plate 31 is formed by the elastic force of the spring 33 sandwiched between
b (see FIG. 9), and is held at a position where the cartridge chamber lid claw receiving portion 21d can be locked.
At this time, since the cartridge chamber lid 20 is open,
The cartridge chamber lid claw receiving portion 21d is
Housed within.

Then, the user operates the cartridge chamber cover opening / closing knob 21c (not shown) to move the cartridge and the chamber cover 20 toward the camera body 100. Then, on the way, the tip of the cartridge chamber lid claw receiving member 21 rotates the claw member 32 clockwise as shown in FIG. 10B against the urging of the spring 33, and eventually the cartridge chamber lid claw receiving member 21 is rotated. When the portion 21d reaches the position of the claw member 32, the claw member 32 jumps into the cartridge chamber lid claw receiving portion 21d according to the bias of the spring 33. FIG. 10C shows this state.
Thus, the cartridge cartridge lid claw receiving portion 21d is returned to the locked state.

A series of movements in the case of normal use are the same as those in the first and third embodiments, and therefore, the description thereof will be omitted for simplicity.

(Fifth Embodiment) FIGS. 11 and 12 show a camera according to a fifth embodiment of the present invention.
1 is a plan view showing the structure of a cartridge chamber cover and the like as viewed from the inside of the camera, and FIG. 12 is a perspective view showing the appearance of the camera and a state when a film cartridge is loaded.

The above-described fourth embodiment can easily return to the original state when the cartridge chamber lid is opened due to a camera drop or the like in the film winding state. Although the improved type of the camera in the first and second embodiments is shown, the fifth embodiment shows an improved type of the camera in the second embodiment.

That is, when the cartridge chamber lid is opened due to a camera drop or the like, in the camera of the second embodiment described above, the cartridge chamber lid cannot even be shielded, and the cartridge chamber lid claw is not provided. Although a mechanism for locking the receiving member becomes necessary and bad, even with such a structure (a structure in which the cartridge chamber lid itself has the cartridge chamber lid claw portion), a certain situation occurs and the cartridge chamber lid is formed. It is an object of the present invention to provide a camera which can easily return to the original state (the state where the lid of the cartridge chamber is locked) even when the camera is opened.

The lock mechanism shown in FIG. 11, which includes the connecting gear 15, the planetary gear 25, the planetary plate 31, the claw member 32, and the like, is the same as that of the above-described fourth embodiment. The gear train is the same as in the first embodiment. In addition, the same parts as those in the first embodiment are denoted by the same reference numerals.

In FIG. 11, reference numeral 35 denotes a cartridge chamber lid, which is rotated about the shaft 37 in the direction of the arrow to open the cartridge chamber 300. Reference numeral 36 denotes a cartridge chamber lid pawl receiving member having a cartridge chamber lid opening / closing knob 36b shown in FIG. 12B on the back surface, and one end of the spring 22 is hung on the spring locking portion 36a and is urged in one direction. It is mounted in the cartridge lid 35 so as to be movable left and right by opening and closing the cartridge chamber lid opening / closing knob 36b.

FIG. 12 shows a state in which a film cartridge is loaded. When the film cartridge 200 is loaded (inserted) into the cartridge chamber 300, when the film is being rewound, the cartridge chamber cover opening / closing knob 36 is set.
b is moved to the open position to release the engagement between the camera body 100 and the cartridge chamber lid 35 at the bottom of the camera body 100, and then the cartridge chamber lid 35 is swung in parallel to the camera bottom to obtain the state shown in FIG. ). Then, the film cartridge 200 is inserted into the cartridge chamber 300, and the cartridge chamber cover 35 is swung in the opposite direction to the camera bottom in a direction opposite to the above direction to shield the cartridge chamber 300. At this time, the distal end of the cartridge chamber lid claw receiving member 36 is
Enter within 0. Thereafter, when the winding of the film is started, the planetary gear 2 is connected to the connecting gear 15 as described above.
As shown in FIG. 11, the claw member 32 jumps into the cartridge chamber lid claw receiving portion 35b provided on the cartridge chamber lid 35, and the cartridge chamber lid 35 is locked.

Here, in the unlikely event that the planet plate 31 rotates due to a drop of the camera or the like and the claw member 32 is unlocked from the claw receiving portion 35b of the cartridge chamber lid, and the cartridge chamber lid 35 is opened. Is in the state shown in FIG. 12B, and the cartridge chamber lid 35 is turned parallel to the camera bottom [FIG.
(In the direction opposite to the dotted arrow in (b)), the cartridge chamber lid end face 35a knocks down the claw member 32, and when the cartridge chamber lid 35 completely shields the cartridge chamber 300, the cartridge chamber lid claw receiving portion The claw member 32 jumps into 35b, and the cartridge chamber lid 35 is locked again.

Accordingly, no matter how much the cartridge chamber lid claw knob 36b is opened and closed thereafter, the claw member 32
Is the cartridge chamber lid claw receiving portion 35 of the cartridge chamber lid 35.
Since b is locked, the cartridge chamber cover 35 is not opened when the film is wound.

When the film cartridge 200 is normally used, the movement at the time of taking out the film cartridge is the second movement.
The description is omitted because it is the same as that of the embodiment.

According to each of the above embodiments, a planetary plate is provided which is driven by rotation of a part of a gear of a film feeding gear train of a camera, and the planetary plate is rotated by a film winding force.
The cartridge chamber lid is locked with the cartridge chamber lid or the cartridge chamber lid claw provided on the cartridge chamber lid claw receiving member provided in the cartridge chamber lid, so that the cartridge chamber lid is opened even if the cartridge chamber lid opening / closing knob is operated. The following effects can be obtained because it is prevented from being opened carelessly.

1) Without the need for a dedicated actuator,
A lock mechanism for preventing inadvertent opening of the cartridge chamber lid can be provided.

2) It is possible to provide a low cost lock mechanism with a small number of parts.

3) A reliable locking mechanism resistant to vibration and dropping can be provided.

4) The opening / closing operation of the cartridge chamber lid is the same as the conventional one, and only the cartridge chamber lid is prevented from being carelessly opened. Therefore, it can be said that the lock mechanism is easy to understand for the camera user.

5) A lock mechanism for automatically locking and unlocking the lock by mechanical movement of the camera can be provided.

6) A lock mechanism for preventing the light shielding plate (at the film entrance) provided in the film cartridge from being moved by an inadvertent opening operation of the cartridge chamber lid, thereby preventing the film from being damaged. It can be.

7) There is no need to attach a forced rewind switch to the cartridge chamber cover opening / closing knob as in the prior art, and there is little restriction on the camera design.

(Correspondence between the invention and the embodiment) For example, in the first embodiment, the connecting gear 15 corresponds to a part of the gears of the film feeding gear train of the present invention, and the planet plate 26 serves as the lock member of the present invention. Correspondingly, the cartridge chamber lid claw receiving member 21 corresponds to the cartridge chamber lid claw receiving member of the present invention.

The above is, for example, the correspondence between the components of the first embodiment and the components of the present invention. However, the present invention is not limited to the configurations of these embodiments, and the functions described in the claims are not limited. Needless to say, any configuration may be used as long as the functions of the embodiments can be achieved.

(Modification) In the first embodiment, the cartridge chamber lid claw portion 21d is used, and in the second embodiment,
The recesses 20c provided in the cartridge chamber lid 20 are each fixed to the planetary plate 26 (the tip of the planetary plate 26) which is a lock member
Of course, the cartridge chamber lid claw 21d and the concave portion 20c provided in the cartridge chamber lid 20 may be simultaneously locked.

Although the present invention has been described as applied to a camera such as a single-lens reflex camera, a lens shutter camera, and a video camera, the present invention may be applied to other optical devices and other devices, and further to a constituent unit. Can be done.

Further, the present invention may have a configuration in which the above embodiments or their techniques are appropriately combined.

[0099]

As described above, according to the first aspect of the present invention, the first rotation of the film feeding gear train is obtained by obtaining the rotational force from a part of the gears of the film feeding gear train. In the first position when the some gears are rotating in the direction,
A direction opposite to the first rotation direction of the film feeding gear train
Wherein when a portion of the gear is rotating in the second rotational direction enters the locking member to be moved respectively to the second position, the cartridge chamber lid in the movement locus of the claw receiving portion is the locking member in the closed state of When the lock member is moved to the first position, the claw portion of the lock member engages with the claw receiving portion, and the cartridge chamber lid claw receiver disables the operation of opening the operating member. A member is provided, and a part of the gears of the film feeding gear train is rotated in the film winding direction, so that the lock member is engaged with the cartridge chamber cover claw receiving member, so that the operation member cannot be opened. I have.

According to the second aspect of the present invention,
The rotational force is obtained from a part of the gears of the film feeding gear train, and the first gear is moved to the first position when the part of the gears is rotating in the first rotation direction of the film feeding gear train. said film feeding gear train and the first rotational direction when the portion of the gear in a second rotational direction opposite direction is rotating it to the second position
Provided with a locking member to be moved respectively, the cartridge chamber cover, the said locking member in the closed state the first
When the lock member is moved to the position, the claw portion of the lock member enters and engages with the claw receiving portion, and a part of the gears of the film feeding gear train rotates in the film winding direction, so that the lock member is moved. By engaging with the cartridge chamber lid, the cartridge chamber lid is made inoperable regardless of the opening operation of the operation member.

Therefore, even if an operation member of the camera user is improperly operated, vibration is applied to the camera, or the camera is dropped, the cartridge chamber lid is inadvertently opened and the film is damaged. Can be prevented by a simple configuration.

According to the third aspect of the present invention, when the cartridge chamber lid pawl receiving member moves in conjunction with the cartridge chamber lid pawl receiving member and moves to a state where the cartridge chamber lid pawl receiving member is locked by the lock member, A light-shielding plate opening / closing member that locks a light-shielding plate provided at a film entrance and exit of a film cartridge from a closed state at least within a range that does not contact the film is provided. By rotating in the winding direction, the operation member cannot be opened, and the light-shielding plate moves only within a range where it does not contact the film, or is locked from the open state so that it does not move. I have.

Therefore, it is possible to prevent the cartridge chamber cover from being opened by an inadvertent operation of the operation member by the camera user, and at the same time, the light-shielding plate comes into contact with the film drawn from the film cartridge, and Damage can be prevented.

According to the present invention described in claim 4,
The lock member, a planetary plate that works with some of the gears of the film transport gear train, and rotatably integral claw portion at the tip of the planetary plate, the claw portion relative to the planetary plate one When the cartridge compartment lid is opened due to a camera drop or the like while the lock member is in a position where the lock member is engaged with the cartridge compartment lid claw receiving member, the cartridge is configured by an elastic portion for urging in the direction. By moving the claw receiving member of the chamber cover and rotating the claw portion against the elastic portion, the claw receiving member of the cartridge chamber cover is positioned to be engaged with the lock member again.

Therefore, it is possible to easily set the cartridge chamber lid to the inoperable state again without driving the film feeding gear train to move the lock member from the second position to the first position.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a structure of a main part of a camera according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a part of a film feeding gear train of the camera according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing a part of a mechanism for locking a locking member of a cartridge chamber lid of the camera according to the first embodiment of the present invention.

FIG. 4 is an exploded perspective view showing a structure of a cartridge chamber lid and a cartridge chamber lid claw receiving member of the camera according to the first embodiment of the present invention.

FIG. 5 is a perspective view showing the appearance of the camera according to the first embodiment of the present invention and how the film cartridge is loaded in the camera.

FIG. 6 is an exploded perspective view showing a structure of a cartridge chamber lid and a cartridge chamber lid claw receiving member of a camera according to a second embodiment of the present invention.

FIG. 7 is an exploded perspective view showing a structure of a cartridge chamber lid and a cartridge chamber lid claw receiving member of a camera according to a third embodiment of the present invention.

FIG. 8 is a view showing the movement of a cartridge chamber cover 20 and the like in a third embodiment of the present invention.

FIG. 9 is an exploded perspective view showing the structure of a cartridge chamber lid locking mechanism of a camera according to a fourth embodiment of the present invention.

FIG. 10 is a plan view showing the movement of a cartridge chamber lid and a lock mechanism of FIG. 9 as viewed from inside the camera.

FIG. 11 is a plan view showing the structure of a cartridge chamber cover and a lock mechanism of a camera according to a fifth embodiment of the present invention as viewed from inside the camera.

FIG. 12 is a perspective view showing an appearance of a camera according to a fifth embodiment of the present invention and a state when a film cartridge is loaded in the camera.

[Explanation of symbols]

 7, 10, 25 Planetary gear 11, 12 One-way clutch gear 13 One-way clutch 15, 16, Connection gear 20, 35 Cartridge chamber lid 21, 36 Cartridge chamber lid claw receiving member 21d, 35d Cartridge chamber lid claw receiving part 22, 33 Spring 26, 31 Planetary plate 32 Claw member

Claims (4)

(57) [Claims] In a camera having a cartridge chamber lid for shielding a cartridge chamber and an operation member for opening and closing the cartridge chamber lid, rotational force is transmitted from a partial gear of a film feeding gear train. When the partial gears are rotating in the first rotation direction of the film feeding gear train, the first position of the film feeding gear train is moved to the first position .
A locking member to be moved respectively into the second position when the rotation direction of said part of the gear in a second rotational direction reverse rotating, the cartridge chamber lid is claw receiving portion in the closed state the lock When the lock member enters the movement trajectory of the member and the lock member is moved to the first position, the claw portion of the lock member engages with the claw receiving portion, and the operating member integrally formed. A cartridge chamber lid claw receiving member for disabling the opening operation of the cartridge. 2. A camera comprising: a cartridge chamber cover for blocking a cartridge chamber; and an operation member for opening and closing the cartridge chamber cover. When the partial gears are rotating in the first rotation direction of the film feeding gear train, the first position of the film feeding gear train is moved to the first position .
With the direction of rotation when the part of the gear in a second rotational direction opposite direction is rotated providing a locking member to be moved respectively to the second position, the cartridge chamber cover,
A camera, comprising: a claw receiving portion in which a claw portion of the lock member enters and engages when the lock member is moved to the first position in a closed state. 3. A motion in conjunction with the cartridge chamber Futatsume receiving member, if the cartridge chamber Futatsume receiving member moves to a state to be engaged by said locking member, shading that provided in film entrance of a film cartridge 2. The camera according to claim 1, further comprising a light-shielding plate opening / closing member that locks the plate from a closed state so that the plate can be moved only within a range that does not contact the film. Wherein said locking member includes a planetary plate that works with some of the gear of the film transport gear train, and rotatably integral claw portion at the tip of the planet plates, the planetary plate 4. The camera according to claim 1, wherein the camera is a member comprising an elastic portion for urging the claw portion in one direction.