JPH08248507A - Camera equipped with film cartridge loading preventing device - Google Patents

Abstract

PURPOSE: To provide a camera equipped with a film cartridge loading preventing device capable of preventing the damage of a key groove or a light shielding door opening/closing driver which is caused when a film cartridge is inserted in a cartridge chamber. CONSTITUTION: This device is equipped with the cartridge chamber in which the film cartridge 1 is housed; an opening/closing door 50 opening/closing a loading port for loading/unloading the film cartridge 1 in/from the cartridge chamber; opening/closing cover locking mechanisms 50a and 56 locking the cover 50 by manual operation; a regulating member 59 which prevents the film cartridge 1 from being loaded in the cartridge chamber when it advances to the cartridge chamber and allows the film cartridge 1 to be loaded in the cartridge chamber when it is retreated from the cartridge chamber; and a regulating member driving mechanism 56 retreating the regulating member 59 from the cartridge chamber when the opening/closing cover locking mechanisms 50a and 60 are manually operated in a direction to release locking of the cover 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera in which a film cartridge having a light-shielding door that opens and closes can be loaded.

[0002]

2. Description of the Related Art US Pat. No. 5,122,
As known from JP-A No. 820 and JP-A No. 5,296,887, etc., in the unused state, even the leading end of the film is wound into the cartridge, and the light-shielding door provided in the cartridge is opened during use. There has been proposed a camera film cartridge having a structure in which a spool in the cartridge is rotated to discharge the film from the light shielding door.

In this film cartridge, when inserted into a cartridge chamber of a camera in a predetermined direction, a key groove formed at an end portion of a rotation shaft of a light shielding door rotatably provided is provided in the cartridge chamber. When the open / close lid (for example, the back cover) is locked by manually operating the open / close lid lock mechanism to close the film cartridge loading opening of the camera, the shade door open / close driver rotates. The structure is designed to open the light shielding door. After completion of a series of photographing, when the opening / closing lid lock mechanism is manually operated again to take out the film cartridge to unlock the opening / closing lid, the light shielding door opening / closing driver rotates in the opposite direction to close the light shielding door.

The key groove formed at the end of the rotary shaft of the light-shielding door and the camera-side light-shielding door opening / closing driver can be engaged with each other in the axial direction only when their shapes match in the rotating direction. And have shapes corresponding to each other. Therefore, when the film cartridge is inserted into the cartridge chamber, the key groove and the light-shielding door opening / closing driver need to be positioned at pivotal positions where they can be engaged with each other.

However, in a camera using this type of film cartridge, the light-shielding door opening / closing driver rotates in response to a manual operation of the opening / closing lid lock mechanism regardless of the presence or absence of the film cartridge in the cartridge chamber. For this reason, with the opening / closing lid open, if the opening / closing lid locking mechanism is manually operated in the direction to lock the opening / closing lid before inserting the film cartridge into the cartridge chamber, the light-shielding door opening / closing driver opens the light-shielding door. In this state, even if the film cartridge is inserted into the cartridge chamber in a predetermined direction in this state, the key groove and the light shielding door opening / closing driver do not engage with each other because their shapes in the rotating direction do not match. If the film cartridge is forcibly pushed into the cartridge chamber in this state, the key groove, the light-shielding door opening / closing driver, and these peripheral parts will be damaged.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. When the film cartridge is inserted into the cartridge chamber, the shape of the key groove and the light-shielding door opening / closing driver in the rotational direction is changed. An object of the present invention is to provide a camera equipped with a film cartridge loading prevention device that can prevent damage to a key groove, a light-shielding door opening / closing driver or the like that may occur due to a mismatch.

[0007]

SUMMARY OF THE INVENTION A camera provided with a film cartridge loading preventing device according to the present invention includes a cartridge outer frame having a spool therein; a film ejection opening formed in the cartridge outer frame; and a film supported on the cartridge outer frame. In a camera capable of loading a film cartridge, the camera including a light-shielding door having a rotating shaft for opening and closing a film discharge opening and opening; a key groove formed at an end of the rotating shaft; Chamber; an opening / closing lid for opening / closing a loading port for loading / unloading the film cartridge into / from the cartridge chamber; an opening / closing lid locking mechanism for manually locking the opening / closing lid; Prevents loading of the film cartridge into the cartridge chamber when it advances, and retracts from the cartridge chamber When the opening / closing lid lock mechanism is manually operated in the direction to lock the opening / closing lid, the regulating member is advanced into the cartridge chamber, and the opening / closing lid locking mechanism is operated. And a regulating member drive mechanism for retracting the regulating member from the cartridge chamber when manually operated in a direction to unlock the opening / closing lid.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to illustrated embodiments. FIG. 10 shows a vertical sectional view of a camera 30 equipped with the film cartridge light-shielding door open / close detection device of the present invention. This camera 30 is used as a photographic film in US Pat. Nos. 5,122,820 and 5,296,88.
A film cartridge of the type known from Japanese Patent No. 7 is used. First, the film cartridge will be described. 11 and 12 are perspective external views showing the film cartridge.

The film cartridge 1 has a cartridge outer frame 3 composed of a pair of outer frame halves 5 and 7. A spool 11 around which a film (not shown) is wound is housed in the internal space of the cartridge outer frame 3. At the center of each end surface 13 of the cartridge outer frame 3, the spool 1
Corresponding fork engaging hole 11a formed at the shaft end portion of No. 1
A hole 15 is formed to expose the to the outside.

Further, a rectangular film discharge / inlet opening 17 is formed in the cartridge outer frame 3 along the longitudinal direction thereof, and light shielding for opening / closing the film discharge / inlet opening 17 is formed along the film discharge / inlet opening 17. A door 19 is provided. A shaft portion 19a coaxially positioned is integrally formed at each of both ends in the longitudinal direction of the light shielding door 19. Each shaft portion 19a is rotatably fitted in a hole 21 formed in the corresponding end surface 13 of the cartridge outer frame 3. A key groove 19b is formed on the end surface of each shaft portion 19a. A driver (light-shielding door opening / closing driver) 51 provided on the camera 30 side engages with one key groove 19b,
The light blocking door 19 is opened and closed by the rotation of the driver 51. The key groove 19b and the driver 51 are formed in corresponding shapes so that they can be engaged with each other in the axial direction only when their shapes coincide with each other in the rotating direction. The film in the film cartridge 1 is discharged or stored in the outside of the cartridge outer frame 3 through the film discharge / inlet opening 17 by rotating the spool 11 with the light shielding door 19 opened.

Next, the camera 30 will be described in detail. Inside the camera 30, a spool chamber 31 and a cartridge chamber 32 are formed on the left and right. A spool 33 is rotatably provided in the spool chamber 31. A drive fork 34 that engages with the fork engagement hole 11 a of the film cartridge 1 is provided inside the cartridge chamber 32 in a state of protruding from the center of the upper end 32 a of the cartridge chamber 32 into the cartridge chamber 32.

Between the spool chamber 31 and the cartridge chamber 32, an aperture 39 is formed by the left and right aperture frames 35, 36 and the upper and lower aperture frames 37, 38 to determine the photographing range of one film frame. A film pressing leaf spring 41 is fixed to a side portion 35a of the aperture frame 35 on the spool chamber 31 side. At the tip of the film pressing plate spring 41, the film pressing roller 40 elastically contacted with the spool 33 by the film pressing plate spring 41.
Is provided. Note that reference numerals 43, 44, and 45 respectively indicate a finder, a taking lens, and a release button.

The camera 30 has a structure in which the film cartridge 1 is inserted into the cartridge chamber 32 via a loading port 47 formed in the camera bottom portion 46. The camera bottom 46 has a loading port 47 pivotally attached by a shaft 49.
An opening / closing lid 50 for opening and closing is provided. Further, inside the camera 30, a driver 51 that is projected into the cartridge chamber 32 is provided. This driver 5
1 is a film cartridge 1 when the film cartridge 1 is inserted into the cartridge chamber 32 in a predetermined direction.
It is fitted into one of the key grooves 19b. In the camera 30 of this embodiment, the driver 51 is fitted in the key groove 19b on the side shown in FIG. This driver 51
It is rotated about the shaft 51a by a drive mechanism (light-shielding door opening / closing driver drive mechanism). This drive mechanism includes an interlocking arm 53, a relay lever 60, a gear portion 51b, and the like.

1 to 9 show the essential parts of a camera 30 equipped with a film cartridge loading preventing device which is a feature of the present invention. 1 to 3 show a state in which the film cartridge 1 is being inserted into the cartridge chamber 32,
4 to 6 show a state in which the film cartridge 1 is loaded in the cartridge chamber 32, and FIGS. 7 to 9 show a state in which the film cartridge 1 is prevented from being loaded in the cartridge chamber 32 by the film cartridge loading blocking device of the present invention. Are shown respectively. The driver 51
It is provided so as to project inside the cartridge chamber 32 through a hole (not shown) formed in the upper end 32a of the cartridge chamber 32, and is fixed around the shaft 51a in a fixed portion inside the camera 30. It is supported by (not shown).

Inside the camera 30, a cartridge chamber 32 is provided.
An interlocking arm 53 is arranged along the inner side wall. The interlocking arm 53 has a portion slightly below the center portion thereof supported by a fixed portion (not shown) inside the camera 30 so as to be rotatable about a shaft 54. A fork portion 53a that engages with the movement lock member 56 is formed at the lower end of the interlocking arm 53, and a fork portion 53b that engages with the engaging arm portion 60a of the relay lever 60 is formed at the upper end. There is. In the lower part of the cartridge chamber 32 and in the vicinity of the fork portion 53a of the interlocking arm 53, a movement lock member 56 supported so as to be movable in the front-rear direction of the camera 30 (left-right direction in FIG. 2) within a predetermined range is provided. The movement lock member 56 is formed in a substantially inverted T shape,
The horizontal portion 57 extends in the horizontal direction, and the vertical portion 58 extends vertically upward from the horizontal portion 57.

A fork portion 53 is provided at the upper end of the vertical portion 58.
A pin 58a that engages with a is planted. Horizontal part 57
One end 57a of the engaging portion 50 is formed on the opening / closing lid 50.
It can be engaged with a. The movement lock member 56 is moved toward the rear of the camera 30 to move the lock position (see FIG. 5).
Position), the one end 57a of the horizontal portion 57 is engaged with the engaging portion 50a to lock the opening / closing lid 50, and the movement lock member 56 is moved toward the front of the camera 30. When located in the unlocked position (the position shown in FIG. 2), the one end 57a of the horizontal portion 57 is engaged with the engaging portion 50a.
The opening and closing cover 50 can be opened by releasing the engagement with. A regulating bar (regulating member) 59 that extends horizontally from the horizontal portion 57 toward the left side of the camera 30 (left side in FIG. 10) is integrally formed at the other end portion 57b of the horizontal portion 57. The regulation bar 59 is provided when the movement lock member 56 is slid toward the rear of the camera 30, that is, the horizontal portion 57.
When the one end portion 57a of the movable member engages with the engaging portion 50a, it advances into the cartridge chamber 32, and when the movement lock member 56 slides toward the front of the camera 30, that is, the horizontal portion 57.
When the one end portion 57a of the cartridge is released from the engagement with the engagement portion 50a, the cartridge 57 is retracted from the cartridge chamber 32. The film cartridge 1 cannot be inserted into the cartridge chamber 32 when the regulation bar 59 has advanced into the cartridge chamber 32. When the regulation bar 59 is retracted from the cartridge chamber 32, the film cartridge 1 can be inserted into the cartridge chamber 32. Since the regulation bar 59 is located at the bottom of the cartridge chamber 32 as shown in FIGS. 4 and 5 when it advances into the cartridge chamber 32, the regulation bar 59 is different from the film cartridge 1 already loaded in the cartridge chamber 32. Does not interfere. The movement lock member 56, the opening / closing operation section 55, and the like constitute a regulating member drive mechanism.

On one side of the body of the camera 30, there is provided an opening / closing operation section 55 connected to the movement lock member 56. When the opening / closing operation section 55 is manually slid in the front-rear direction of the camera 30, The movement lock member 56 also slides in the same direction. Therefore, the movable lock member 56 can be moved to the locked position and the unlocked position by manually operating the opening / closing operation section 55. Engagement portion 50a, movement lock member 56, opening / closing operation portion 5
An opening / closing lid lock mechanism is composed of 5 and the like.

A relay lever 60 is provided above the cartridge chamber 32 inside the camera 30 so as to be rotatable about a shaft 61 having the same rotation center as the drive fork 34. The relay lever 60 is formed with an engagement arm portion 60a that engages with the fork portion 53b of the interlocking arm 53, and a fan-shaped gear portion 60b that meshes with the gear portion 51b formed on the upper portion of the driver 51. With this structure, when the interlocking arm 53 rotates about the shaft 54, the relay lever 60 is passed through the fork portion 53b and the engaging arm portion 60a.
Both rotate about the shaft 61, and the driver 51 also rotates about the shaft 51a via the fan-shaped gear portion 60b and the gear portion 51b.

The camera 30 provided with the film cartridge loading preventing device having the above structure operates as follows. The film cartridge 1 is in the state shown in FIGS. 1 to 3, that is, the opening / closing lid 50 is open and the movement lock member 56 is provided.
Is inserted into the cartridge chamber 32 when the is in the unlocked position moved forward of the camera 30. In this state, when the film cartridge 1 is properly inserted into the cartridge chamber 32, the driver 51 is fitted into the corresponding key groove 19b of the film cartridge 1.

After the film cartridge 1 is loaded into the cartridge chamber 32, the opening / closing lid 50 is manually closed, and then the opening / closing operation portion 55 is slid toward the rear of the camera 30 to lock the opening / closing lid 50. . Then, the moving lock member 56 is positioned at the lock position, and at the same time, the one end portion 57a of the horizontal portion 57 engages with the engaging portion 50b. Simultaneously with the sliding operation of the opening / closing operation portion 55, the regulation bar 59 formed integrally with the movement lock member 56 advances into the cartridge chamber 32. Simultaneously with the sliding operation of the opening / closing operation portion 55, the pin 58a moves the fork portion 53a from right to left in FIG.
, And thus the fork portion 53b moves the engaging arm portion 60a from left to right in FIG. 2, and as a result,
The relay lever 60 rotates counterclockwise in FIG. The rotation of the relay lever 60 is transmitted to the driver 51 via the fan-shaped gear portion 60b and the gear portion 51b, so that the driver 51 rotates in the clockwise direction in FIG. By this rotation, the driver 51 opens the light shielding door 19 of the film cartridge 1 (FIGS. 4, 5, and 6). After opening the light shielding door 19, the film F in the film cartridge 1 is sent out toward the spool chamber 31.

When the film cartridge 1 is taken out of the cartridge chamber 32 after a series of photographing operations, the opening / closing operation section 55 is slid toward the front of the camera 30.
Then, the movement lock member 56 moves in the same direction and is positioned at the unlocked position, and at the same time, the one end portion 57 of the horizontal portion 57.
a is separated from the engaging portion 50b, the regulating bar 59 is retracted from the cartridge chamber 32 at the same time, and at the same time, the driver 51 causes the driver 51 to rotate counterclockwise in FIG. 1 due to the relationship between the pin 58a, the interlocking arm 53, the relay lever 60, and the gear portion 51b. The light shielding door 19 of the film cartridge 1 is closed by rotating in the direction. In this state, the film cartridge 1 is taken out from the cartridge chamber 32.

When the film cartridge 1 is not loaded in the cartridge chamber 32, that is, before the film cartridge 1 is inserted in the cartridge chamber 32, the opening / closing lid 50 is opened and the opening / closing operation section 55 is slid. It is conceivable that the movable lock member 56 is located at the lock position. This state is shown in FIGS. In this state, the opening / closing lid 50 is in the open state, but the regulating bar 59 is in the position where it has advanced into the cartridge chamber 32, so that the film cartridge 1 cannot be inserted into the cartridge chamber 32. To insert the film cartridge 1 into the cartridge chamber 32,
The opening / closing operation section 55 may be slid toward the front of the camera 30 to position the movable lock member 56 at the unlocked position.

As described above, the camera 3 to which the present invention is applied
According to 0, before the film cartridge 1 is inserted into the cartridge chamber 32, the opening / closing lid 50 is opened, and the opening / closing operation portion 55 is slid to move the moving lock member 56 to the lock position. When the film cartridge 1 is inserted into the cartridge chamber 32, the regulation bar 59 prevents the film cartridge 1 from being loaded into the cartridge chamber 32.
It is possible to reliably prevent damage to the key groove 19b, the driver 51, or the like, which may occur due to the shape mismatch between the b and the driver 51 in the rotating direction.

[0024]

As described above, according to the camera provided with the film cartridge loading preventing device of the present invention, when the opening / closing lid lock mechanism is manually operated in the direction of locking the opening / closing lid, the regulating member is placed in the cartridge chamber. Since it advances and blocks the loading of the film cartridge into the cartridge chamber, when inserting the film cartridge into the cartridge chamber,
It is possible to prevent damage to the keyway, the light-shielding door opening / closing driver, or the like, which may occur due to the shape mismatch between the keyway and the light-shielding door opening / closing driver.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a camera including a film cartridge loading preventing device of the present invention in a state where an opening / closing lid is opened and a movable lock member is in an unlocked position.

FIG. 2 is a vertical cross-sectional view showing a main part of the drawing.

FIG. 3 is a cross-sectional view showing a main part of FIG.

FIG. 4 is a perspective view showing a main part shown in FIG. 1 in a state where an opening / closing lid is locked.

FIG. 5 is a vertical cross-sectional view showing the main part of FIG.

6 is a cross-sectional view showing the main parts of FIG.

FIG. 7 is a perspective view showing a main part shown in FIG. 1 in a state in which an opening / closing lid is opened and a movable lock member is in a lock position.

FIG. 8 is a vertical cross-sectional view showing the main part of FIG.

9 is a cross-sectional view showing the main parts of FIG.

FIG. 10 is a vertical cross-sectional view of a camera including the film cartridge loading preventing device of the present invention.

FIG. 11 is a perspective external view of a film cartridge.

FIG. 12 is a perspective external view of the film cartridge of FIG. 12 as viewed from different angles.

[Explanation of symbols]

 1 Film Cartridge 3 Cartridge Outer Frame 11 Spool 17 Film Ejection / Inlet Opening 19 Shading Door 19a Shaft (Rotating Shaft) 19b Key Groove 21 Hole 30 Camera 31 Spool Chamber 32 Cartridge Chamber 47 Loading Port 50 Opening / Closing Cover 51 Driver (Shading Door Opening / Closing) Driver) 53 Interlocking arm 55 Opening / closing operation part 56 Movement lock member 59 Restriction bar (restriction member)

Claims (3)

[Claims] 1. A cartridge outer frame having a spool therein; a film discharge / inlet opening formed in the cartridge outer frame; and a rotation shaft supported by the cartridge outer frame, and the film discharge / inlet opening. In a camera capable of loading a film cartridge equipped with a light-shielding door that opens and closes; and a key groove formed at the end of the rotating shaft, a cartridge chamber for accommodating the film cartridge; An opening / closing lid for opening / closing the loading port; a locking mechanism for opening / closing the opening / closing lid by manual operation; provided in the cartridge chamber so as to be able to move back and forth, and when the cartridge chamber is advanced to the cartridge chamber of the film cartridge When loading the film cartridge and retracting it from the cartridge chamber, the cartridge A regulating member that allows loading into the chamber; when the opening / closing lid lock mechanism is manually operated in a direction to lock the opening / closing lid, the regulating member is advanced into the cartridge chamber, and the opening / closing lid locking mechanism causes the opening / closing lid to be opened. And a regulating member driving mechanism for retracting the regulating member from the cartridge chamber when manually operated in a direction to unlock the camera. 2. The opening / closing lid lock mechanism according to claim 1, further comprising a movable lock member movably provided between a lock position for locking the opening / closing lid and an unlocked position for releasing the lock. A camera provided with the film cartridge loading preventing device, wherein the regulating member is provided integrally with the movement lock member. 3. The light shielding door opening / closing driver engaging with the key groove when the film cartridge is loaded in the cartridge chamber according to claim 1 or 2, wherein the opening / closing lid is locked by the opening / closing lid locking mechanism. A light-blocking door opening / closing driver driving mechanism for rotating the light-blocking door opening / closing driver in a direction to open the light-blocking door, and rotating the light-blocking door opening / closing driver in a direction to close the light-blocking door when the lock is released; A camera equipped with a film cartridge loading prevention device.