JPH075540A - Cartridge chamber cover locking mechanism - Google Patents

Abstract

PURPOSE:To surely prevent a cartridge chamber cover from being opened when film is being pulled out from a cartridge case and to prevent a camera from getting large and the cost from getting high by linking a cartridge chamber over locking mechanism with a light shading door opening/closing mechanism without using a complicated mechanism in a device using a thrust type cartridge provided with a light shading door at a film inserting port. CONSTITUTION:A holding recessed part 10d recessed in a direction crossed with the opening/closing direction of the cartridge chamber cover 11 is formed in a camera main body 10; and an engaging member 19 consisting of 1st engaging parts 19a and 19b engaged with one side end 5b of a linking member and a 2nd engaging part 19c engaged with and disengaged from the recessed part 10d of the camera main body 10 is provided in the cover 11. The 2nd engaging part 19c is engaged with the recessed part 10d in a state where the light shading door is opened, and it is disengaged from the recessed part 10d in a state where the door is closed. Then, a light shading door opening/closing member 18 is engaged with the other side end 5a of the linking member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus such as a camera which uses a film cartridge, and a film cartridge is loaded in a cartridge chamber in the apparatus. If the lid of the cartridge chamber is opened, the film is erroneously exposed. In this case, it relates to a mechanism for locking the lid, especially when the film cartridge to be used is a so-called thrust type and has a retractable light-blocking door at the film insertion opening. Lid lock mechanism.

[0002]

2. Description of the Related Art For example, JP-A-55-46.
732 and JP-A-54-128732,
A lid lock mechanism is disclosed for preventing accidental opening of the cartridge chamber lid of a camera. In the lock mechanism disclosed in the former, a small diameter portion is formed on a part of a spool shaft for film winding, and a lever is provided so that the tip presses the small diameter portion. The lid opening / closing mechanism is locked in association with the tilting of the lever that occurs when the spool is wound around the small diameter portion. Further, in the lock mechanism disclosed in the latter, a sensor or the like for detecting the loading of the film is provided, and when the film is detected, the opening / closing mechanism of the lid is locked by using a magnet or the like.

However, in the former lock mechanism, when the film is wound around the spool shaft, the film is pressed toward the outer peripheral surface of the small diameter portion by the tip of the lever, so that the bending strength of the film varies. In some cases, the film may bend and the lid may not lock properly.
Moreover, since the film is pushed by the lever, there is a possibility that the film may be scratched or that the photographing frame may not have sufficient flatness. Further, in the latter lock mechanism, since a dedicated actuator such as a magnet is used to lock the lid, problems such as an increase in cost and an increase in size of the camera occur.

By the way, conventionally, when the film is not loaded in the camera, all the film is wound up to the leading end of the film in the case, and after loading, the film is fed out from the cartridge by the film feeding mechanism on the camera side to the spool shaft. A so-called thrust type cartridge that is wound around has been proposed. In a camera using this thrust type cartridge, the cartridge can be inserted into and removed from the cartridge chamber in the axial direction of the cartridge spool, and therefore the lid of the cartridge chamber can be made relatively small and provided on the upper surface or the lower surface of the camera body. With this type of camera, if the user tries to force the cartridge out by opening the lid of the cartridge chamber while the film is being pulled out of the cartridge, not only will the film be exposed, but the film will tear and tear. May remain in the camera. In that case, it is difficult for the user to take out the torn film because the lid of the cartridge chamber is small, and it may be necessary to repair it.Therefore, in the case of the camera using the thrust type cartridge, the lid is closed. It is important to be able to lock in the locked state.

On the other hand, a cartridge of this thrust type has been proposed in which an opening / closing type light-shielding door is provided at the film insertion opening of the cartridge case. In devices such as cameras that use cartridges with light-shielding doors like this, open the light-shielding doors before loading the cartridge into the cartridge chamber and then sending out the film, and before removing the cartridge after rewinding the film is completed. A mechanism for closing the light blocking door is provided. In this way, since the opening / closing mechanism of the light-shielding door is a mechanism that works after loading and unloading the cartridge, if the lock and unlock of the cartridge chamber lid are linked with this mechanism, without using a dedicated actuator, It is thought that the lock can be reliably performed. In this case, it is conceivable to provide a mechanism for interlocking the opening / closing mechanism of the light blocking door and the locking mechanism of the lid, but since the opening / closing mechanism of the light blocking door and the lid of the cartridge chamber are generally on the opposite side, the interlocking mechanism is provided. If the camera is provided, the camera tends to be large.

Therefore, the technical problem to be solved by the present invention is that in a device such as a camera using a thrust type cartridge having a light-shielding door at the film insertion opening, a lid lock mechanism and a light-shielding door opening / closing mechanism are complicated mechanisms. Is used to prevent the lid from opening when the film is pulled out from the cartridge case, and to prevent the size and cost of the camera from increasing.

[0007]

A cartridge chamber lid locking mechanism according to the present invention comprises a cartridge spool to which one end of a roll film is connected, and a substantially cylindrical peripheral wall for winding the roll film around the cartridge spool for storage. A cartridge case composed of both end walls closing both ends thereof, and rotatably holding the cartridge spool by both end walls, a light-shielding door for opening and closing a film insertion opening formed on the peripheral wall, and an integral opening and closing of the light-shielding door. A thrust type film cartridge provided with interlocking members arranged on both end walls so as to rotate, and a cartridge chamber in which the cartridge can be taken in and out along the axial direction of the cartridge spool, and the cartridge chamber is opened and closed. A cartridge chamber lid locking mechanism for a device with a possible lid, the technique described above. To solve the problems, it is characterized in that it is constructed as follows.

That is, a light-shielding door opening / closing drive member that drives the opening / closing of the light-shielding door by engaging one of the interlocking members by loading the cartridge into the cartridge chamber, and closing the lid with the cartridge loaded in the cartridge chamber. The engaging portion that engages with the other of the interlocking members and that rotates with the opening and closing of the light shielding door, and the rotation of the engaging portion that accompanies the opening and closing of the light shielding door prohibit the opening and closing of the lid when the light shielding door is opened. It has a lock member that enables opening and closing of the lid when closed. The light-shielding door opening / closing driving member may be manually operated or may be driven by a motor.

[0009]

In the above structure, when the cartridge is loaded in the cartridge chamber, the interlocking member on the side opposite to the lid engages with the light shielding door opening / closing member. Then, by closing the lid of the cartridge chamber, the engaging portion engages with the interlocking member located on the lid side. After that, when the light-blocking door opening / closing drive member is operated, the interlocking member and the light-blocking door operate integrally, so that the light-blocking door can be driven to the open position. At this time, the lock member locks the lid in a closed state.

On the other hand, when the film rewinding is completed,
This time, the light-blocking door opening / closing drive member can drive the interlocking member in reverse to close the light-blocking door. At this time, since the lock member is simultaneously driven and the lock of the lid is released, it is possible to open the lid and take out the cartridge.

As described above, according to the above configuration, the lock and the unlock of the cartridge chamber lid are interlocked with the light shielding door opening / closing mechanism,
Since the lid is locked after the cartridge is loaded and the lid is unlocked before the cartridge is taken out, it is possible to prevent the lid from being opened accidentally. Further, since a lock member that engages with the interlocking member located on the cartridge chamber lid side is provided without using a dedicated actuator or the like, the configuration is simple, and it is possible to prevent an increase in size and cost of the camera.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A camera equipped with a cartridge chamber lid locking mechanism according to an embodiment of the present invention shown in FIGS. 1 to 7 will be described in detail below.

First, a cartridge used in this camera will be described with reference to FIGS. The cartridge 1 is composed of a cartridge spool 2 around which a film is wound, a cartridge case 3 including a substantially cylindrical peripheral wall 3a and both end walls 3b rotatably holding both ends of the cartridge spool 2, and is provided in a cartridge chamber of a camera. When not loaded, the film is wound up and stored in the cartridge case 3 up to the leader section at the tip. When loaded in the cartridge chamber, the film is fed from the cartridge case 3 by the film feeding mechanism provided in the camera. It is a so-called thrust type cartridge that is wound around a spool shaft.

When the film is pushed out of the cartridge case 3 after being loaded into the camera, the film insertion opening 3c formed in the peripheral wall 3a is opened in the cartridge 1 so that the film is completely inserted into the cartridge case 3. A light-shielding door 4 that shields the mouth 3c is provided. The light-shielding door 4 is configured so as to rotate integrally with sockets (interlocking members) 5a, 5b fitted and held on both end walls 3b of the cartridge case 3, and one of the sockets 5a, 5b from the camera side. The door 4 is opened and closed by turning 5a. Each socket 5a, 5b has a center hole 5c.
And has a key groove-shaped slit 5d. Slit 5d
Are arranged so as to be substantially parallel to the film insertion direction when the door 4 is opened, and substantially orthogonal to the film insertion direction when the door 4 is closed.

As shown in FIG. 1, one end surface 3b of the cartridge case is provided with a data disk 6 on the surface of which a bar code indicating the film sensitivity and the number of shots is displayed. The data disk 6 is configured to rotate integrally with the cartridge spool 2, and the bar code signal of the data disk 6 which rotates at the time of initial feeding of the film is read by a sensor provided on the camera side. Although not shown, the data disk 6 is provided with an index, and the cartridge case 3 is such that the stored film is unused, half of the frames have been photographed, or all frames have been photographed. Three types of display marks are provided to indicate whether or not the film is in use, by controlling the stop position of the cartridge spool 2 when the film is rewound.

FIG. 4 is an exploded perspective view showing the cartridge light-shielding door opening / closing mechanism and the cartridge chamber lid locking mechanism. In the figure, 10 is a camera body, and 11 is a cartridge chamber lid. The cartridge chamber lid 11 is the camera body 1
The cartridge chamber 12 is formed so as to fit in the upper left corner when viewed from the rear side, and the cartridge chamber 12 is formed so as to straddle the cartridge chamber lid 11 and the camera body 10. The camera body 10 and the cartridge chamber lid 11 are respectively
It has connecting projections 10a and 11a. Each convex portion 10a,
Holes 10b and 11b into which pins (not shown) are inserted are formed in 11a, and the cartridge chamber lid 11 is opened and closed around these holes 10b and 11b. Also,
A torsion coil spring 13 is mounted between the convex portions 10a, 10a of the camera body 10, and the spring 13 urges the cartridge chamber lid 11 in the opening direction.

Next, the structure of the opening / closing operation portion of the cartridge chamber lid 11 will be described. An L-shaped engaging claw 14 is formed at a position near the back surface of the lower end surface 11c of the cartridge chamber lid 11. The camera body 10 is provided with an operating member 15, and the operating member 15 engages and disengages with the engaging claws 14 to regulate the opening and closing of the lid 11.

5 (a) and 5 (b) show the engagement / disengagement state of the engaging claw 14 and the operating member 15. As shown in FIG. The operation member 15 is formed in a substantially rectangular plate shape, and the pin 16 fixed to the camera body 10 side is held in the camera body 10 in a state of being fitted in the elongated hole 15a and can be moved in the left-right direction in the drawing. Has become. Further, the operation portion 15b is provided near the center of the operation member 15.
Is provided so that the user can operate the operation portion 15b through the slit 10c of the camera body 10 (see FIG. 4).

The operating member 15 has an engaging claw 15 on the right side of the upper end.
On the left side of the upper end, b has a vertically elongated slender stopper 15c extending rightward in the figure, and a portion between them is formed as a groove 15d for receiving the engaging claw 14 of the lid. On the other hand, the camera body 10 has a fixed stopper 17. The operating member 15 is urged toward the left side of the drawing by a spring (not shown). When the operating member 15 is operated to the right side of the drawing and then the hand is released, as shown in FIG. The tip end of the stopper stops at the position where it abuts the fixed stopper 17.

When the lid 11 is closed, the stopper 15c of the operating member 15 is in contact with the fixed stopper 17 and positioned as shown in FIG. 5 (a). When the lid 11 is closed in this state, the tip of the stopper 15c of the operating member 15 is pushed down by the engaging claw 14, and the engaging claw 14 enters the groove 15d while the stopper 15c is disengaged from the fixed stopper 17. go. When the stopper 15c is completely removed from the fixed stopper 17,
The operating member 15 is moved to the left side of the drawing by the spring,
As shown in FIG. 5B, the operation member 15 stops at the position where the engaging claws 14 and 15b contact each other, and the lid 11 is held at the closed position.

On the contrary, when the operating member 15 is operated rightward from the position shown in FIG. 5 (b), the engaging claws 15b of the operating member 15 are operated.
Goes away from the engaging claw 14 of the cartridge chamber lid 11.
When the operation is further advanced, the inclined surface of the tip portion of the stopper 15c comes into contact with the inclined surface of the fixed stopper 17, and the stopper 15c bends downward and gets over the fixed stopper 17. At this time, the lid 11 is opened by the torsion coil spring 13 and the operating member 15 is held at the position shown in FIG.

On the other hand, in order to open and close the light shielding door 4 of the cartridge 1, a light shielding door drive member 18 is arranged below the cartridge chamber. The drive member 18 is used for the cartridge 1
The shaft portion 18a fitted in the center hole 5c of the socket 5 so as to rotate the light shielding door 4 by rotating the socket 5a of
And a key-shaped convex portion 18b fitted in the slit 5d. Further, the drive member 18 integrally has a gear portion 18c (tooth shape is omitted in the drawing) so that the rotation of the motor M is transmitted via a reduction mechanism (not shown). It has become.

The cartridge chamber lid 11 is provided with an engaging member 19 which engages with the other socket 5b located on the upper end surface of the cartridge 1. This engaging member 19
Like the drive member 18, has a first engaging portion including a shaft portion 19a fitted into the center hole 5c of the socket 5b and a key-like convex portion 19b fitted into the slit 5d. In addition, the engaging member 19 is provided on the light blocking door 4 of the cartridge 1.
It has an engaging piece (second engaging portion) 19c that projects from the right end surface of the lid 11 when it is opened and retracts into the lid 11 when closed. The engagement piece 19c is provided on the camera body 10 with the lid 11 closed.
A recess 10d for receiving the engagement piece 19c when protruding from 1 is formed.

A schematic configuration of an electric circuit related to the mechanism described above is shown in a block diagram of FIG. In this camera, a microcomputer CPU that controls the entire operation
Further, a light-shielding door driver DR1 and a film feeding driver DR2 are connected to control the light-shielding door motor and the film feeding motor, respectively.
Further, the microcomputer CPU is connected with a cartridge detection switch S1 for detecting whether the cartridge 1 is loaded and a lid opening / closing detection switch S2 for detecting opening / closing of the cartridge chamber lid 11.

The operation of this camera is shown in the flowchart of FIG. First, in step # 1, it is confirmed by the switches S1 and S2 that the cartridge 1 is loaded in the cartridge chamber 12 and the lid 11 is closed. In step # 2, the motor M is driven to shut off the light-shielding door. 4 is opened. At this time, the engaging piece 19 of the engaging member 19
Since c fits into the recess 10d of the camera body 10, the lid 1
1 will be held in the closed state.

Next, in step # 3, the film feeding motor is driven to perform the initial feeding (thrust operation) of the film. Then, when the film is wound around the spool shaft, the shooting of each frame and the winding of one film of film are repeated (this part is omitted in the flowchart), and after the shooting up to the last frame is completed or an intermediate winding (not shown). After pressing the return switch, the film is rewound in step # 4. Then, in step # 5, the use state display of the film is set by controlling the stop position of the cartridge spool 2.
At 6, the light-shielding door 4 is closed. At this time, the engaging piece 1
Since 9c separates from the holding recess 10d, the lid 11 of the cartridge chamber 12 is unlocked at the same time. Therefore, the cartridge 1 can be taken out by operating the operation member 15 as described above.

As described above, in this embodiment, since the lid 11 of the cartridge chamber 12 is locked and unlocked by utilizing the opening / closing mechanism of the light-shielding door 4, a dedicated motor is not required, and the mechanism Upsizing can be prevented. Also,
When the film is pulled out from the cartridge 1, the engaging piece 19c always fits in the holding recess 10d, so that it is possible to reliably prevent the cartridge chamber lid 11 from being accidentally opened.

Next, the modified examples shown in FIGS. 8 and 9A and 9B will be described. The second embodiment is different from the first embodiment in that the opening / closing of the cartridge chamber lid 11 is directly operated without using the lid operating member 15. Since the other parts have the same configuration as in the first embodiment, the same reference numerals as those in the first embodiment will be given and detailed description thereof will be omitted.

In this camera, a connecting portion 10e for connecting one end of the spring 20 is formed on one of the convex portions 10a, 10a formed on the camera body 10 for connecting the lid 11. Lower end surface 1 of lid 11 of cartridge chamber 12
A cutout 11d is formed in 1c, and the other end of the spring 20 is connected therein. In the state shown in FIG. 9 (a), the spring 20 biases the lid 11 in the closing direction.
When you open 1, the biasing direction reverses at a certain point,
Conversely, the lid 11 is biased in the opening direction. Therefore, in the state shown in FIG. 9B, the lid 11 is held open.

In this modification, the cartridge 1 is loaded by opening the lid 11 by hand, inserting the cartridge 1 into the cartridge chamber 12, and then closing the lid 11 by hand. After the cartridge 1 is thus loaded, the motor M is driven to open the light-shielding door 4 of the cartridge 1 and lock the cartridge chamber lid 11 as in the above-described embodiment. When the rewinding of the film and the display setting of the film use state are completed after the photographing is finished, the closing operation of the light shielding door 4 and the unlocking operation of the lid 11 are performed, and the lid 11 is opened by hand to take out the cartridge 1. be able to.

Also in this modified example, as in the above-described embodiment, the cartridge chamber cover 11 is provided when the film is being pulled out from the cartridge 1 while preventing the mechanism from becoming large.
It is possible to reliably prevent accidental opening.

Although an example in which the present invention is applied to a camera has been described above, the lid lock mechanism of the present invention is not applied only to a camera, and an apparatus using a film cartridge (at this time, the film cartridge is used for photographing). It may be applied before or partly used or may be developed). Further, the structure of the lock mechanism is not limited to the above embodiment.

[Brief description of drawings]

FIG. 1 is a perspective view of a cartridge used in a camera provided with a cartridge chamber lid locking mechanism according to the present invention, as viewed from one end face.

FIG. 2 is a perspective view of the cartridge as viewed from the other end surface.

FIG. 3 is a sectional view of the cartridge taken along a plane perpendicular to the axis of the cartridge spool.

FIG. 4 is a perspective view showing a light blocking door opening / closing mechanism and a cartridge chamber lid locking mechanism.

5A and 5B are views showing an engagement / disengagement state of an engagement claw of a cartridge chamber lid and an operation member, wherein FIG. 5A shows a state before engagement and FIG. 5B shows a state after engagement. .

FIG. 6 is a block diagram showing a schematic configuration of an electric circuit related to opening / closing of a light shielding door and locking of a cartridge chamber lid.

FIG. 7 is a flowchart showing the operation of this camera.

FIG. 8 is a perspective view showing a modified example of the light blocking door opening / closing mechanism and the cartridge chamber lid locking mechanism.

9A is a view showing a state where the cartridge chamber lid is closed, and FIG. 9B is a view showing a state where the cartridge chamber lid is opened.

[Explanation of symbols]

1 cartridge 2 cartridge spool 3 cartridge case 3a peripheral wall 3b both end walls 4 light-shielding door 5a, 5b socket (interlocking member) 6 data disk 10 camera body (device body) 10d holding recess 11 cartridge chamber lid 12 cartridge chamber 13 torsion coil spring 14 engagement Synthetic claw 15 Operating member 15b Engaging claw 16 Pin 17 Fixed stopper 18 Driving member 19 Engaging member 19a Shaft part (first engaging part) 19b Key (first engaging part) 19c Engaging piece (second engaging part) )

Claims (1)

[Claims] 1. A cartridge spool (2) to which one end of a roll film is connected, a substantially cylindrical peripheral wall (3a) and a peripheral wall (3a) for winding the roll film around the cartridge spool (2) and storing it. ) End walls (3b) that block both ends
And a cartridge case (3) rotatably holding the cartridge spool (2) by the both end walls (3b).
A light-shielding door (4) for opening and closing the film insertion opening (3c) formed in the peripheral wall (3a), and the both end walls (3) so as to rotate integrally with the opening and closing of the light-shielding door (4). In a device using a thrust type film cartridge (1) having an interlocking member (5a, 5b) arranged in the cartridge cartridge (1), the cartridge (1) can be taken in and out along the axial direction of the cartridge spool (2). The chamber (12), the lid (11) capable of opening and closing the cartridge chamber (12), and one of the interlocking members (5a, 5b) (5a) by loading the cartridge (1) into the cartridge chamber (12). ) To drive the opening and closing of the light shielding door (4).
(18) and the interlocking member (5) by closing the lid (11) with the cartridge (1) loaded in the cartridge chamber (12).
a, 5b) and the other engaging part (19a, 19b) that engages with the other (5b) of the light shielding door (4) and rotates with the opening and closing of the light shielding door (4), The lock member (19c) that prohibits opening and closing of the lid (11) when the light-shielding door is opened and allows opening and closing of the lid (11) when the light-shielding door is closed by rotating (19, 19b).
A cartridge chamber lid locking mechanism having: