JPH08286262A - Camera with film cartridge eject mechanism - Google Patents

Abstract

PURPOSE: To provide a camera provided with a film cartridge eject mechanism by which a cartridge is prevented from falling out at the moment an opening/ closing cover is opened. CONSTITUTION: This camera is provided with a cartridge chamber in which a film cartridge 1 having a film take-up spool inside is loaded in the axial direction of the film take-up spool. The camera is equipped with the opening/ closing cover 50 opens/closes one end of the cartridge chamber; an eject lever TO supported to be moved in a direction parallel with the axial direction of the cartridge chamber and having a part 74 coming in contact with the film cartridge in the cartridge chamber; and interlocking mechanisms 77 and 80 which do not move the eject lever in the case of the opening operation of the opening/closing cover to specified opening degree and interlockingly move the eject lever in a direction where the film cartridge is pushed out when the opening/closing cover moves to an opening end exceeding the specified opening degree.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera provided with a film cartridge eject mechanism for discharging a loaded film cartridge to the outside of the camera.

[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 a camera using a film cartridge of this type, by inserting the film cartridge into a cartridge loading opening formed at the bottom or the top of the camera,
Generally, a camera has a structure for loading a film cartridge. In this general camera, various film cartridge eject mechanisms have been proposed. Some of the proposed film cartridge ejecting mechanisms have a structure in which when the opening / closing lid for opening / closing the cartridge loading port is opened, the cartridge is pushed out by using a biasing means such as a coil spring. With the conventional film cartridge eject mechanism having such a configuration,
As soon as the opening / closing lid is opened, the cartridge may pop out due to the biasing force of the spring, and the cartridge may be damaged.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a camera having a film cartridge ejecting mechanism in which the cartridge does not pop out as soon as the opening / closing lid is opened. To do.

[0005]

SUMMARY OF THE INVENTION A camera provided with a film cartridge eject mechanism of the present invention is a camera having a cartridge chamber in which a film cartridge having a film take-up spool inside is loaded along the axial direction of the film take-up spool. An opening / closing lid that opens and closes one end of the chamber; an eject lever that is movably supported in a direction parallel to the axial direction of the cartridge chamber, and a part of the eject lever contacts the film cartridge in the cartridge chamber; In the opening operation, the eject lever is not moved substantially and the interlocking mechanism that interlocks the eject lever in the direction of pushing out the film cartridge when the opening / closing lid moves to the open end beyond the predetermined opening is provided. I am trying.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to illustrated embodiments. FIG. 5 shows a vertical sectional view of a camera 30 equipped with the film cartridge eject mechanism of the present invention.
The camera 30 uses a film cartridge of the type known in US Pat. Nos. 5,122,820 and 5,296,887 as a photographic film. First, the film cartridge will be described. 6 and 7 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 (film winding spool) 1 around which a film (not shown) is wound is provided in the inner space of the cartridge outer frame 3.
1 is housed. Each end surface 13 of the cartridge outer frame 3
A hole 15 for exposing the corresponding fork engaging hole 11a formed at the shaft end of the spool 11 to the outside is formed in the central portion.

Further, the cartridge outer frame 3 is formed with a rectangular film discharging / injecting opening 17 along the longitudinal direction thereof, and light shielding for opening / closing the film discharging / injecting opening 17 is formed along the film discharging / injecting 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. The driver 51 provided on the camera 30 side engages with the one key groove 19b, and the turning of the driver 51 opens and closes the light shielding door 19. The film in the film cartridge 1 is rotated by the spool 11 with the light-shielding door 19 opened, so that the film discharge opening 1
The cartridge 7 is discharged to the outside of the cartridge outer frame 3 or stored inside.

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 is provided with an opening / closing lid 50 pivotally attached by a shaft (rotating shaft) 49. The opening / closing lid 50 opens / closes the loading port 47, that is, the lower end of the cartridge chamber 32.
Further, inside the camera 30, a driver 51 that is projected into the cartridge chamber 32 is provided. The driver 51 is fitted into one of the key grooves 19b of the film cartridge 1 when the film cartridge 1 is inserted into the cartridge chamber 32 in a predetermined direction. 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
Is rotated about the shaft 51a by the drive mechanism. This drive mechanism includes an interlocking arm 53 and a relay lever 6.
0, a gear portion 51b and the like.

1 and 2 show an embodiment of a film cartridge eject mechanism provided in the camera 30. 1 shows a state in which the opening / closing lid 50 is opened, and FIG.
Indicates a state in which the opening / closing lid 50 is closed. The driver 51 is provided so as to project into the inside of the cartridge chamber 32 through a hole (not shown) formed in the upper end 32a of the cartridge chamber 32, and is rotatable about an axis 51a of the camera 30. It is supported by an internal fixed portion (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. At the lower end of the interlocking arm 53, an engaging portion 5 formed on the opening / closing lid 50 is provided.
0a is formed with a locking claw 53a, and the upper end is
A fork portion 53b that engages with the relay lever 60 is formed. An opening / closing knob 55 is provided on one side of the body of the camera 30.
By manually operating the opening / closing knob 55, the interlocking arm 53 rotates about the shaft 54. The interlocking arm 53, the opening / closing knob 55 and the like constitute an opening / closing lid lock mechanism.

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.

An eject lever 70 for ejecting the film cartridge 1 from the cartridge chamber 32 is provided near the cartridge chamber 32. The eject lever 70 is arranged along the side wall (not shown) of the cartridge chamber 32 and along the axial direction of the cartridge chamber 32 (vertical direction in FIG. 5), and is a guide slot extending in the longitudinal direction. Has 71. A pair of guide pins 72 and 73, which are planted in a fixed portion (not shown) of the camera 30, are fitted into the elongated guide holes 71. The eject lever 70 is slidably supported in the vertical direction of the camera 30, that is, in the direction parallel to the axial direction of the cartridge chamber 32 by the relationship between the guide elongated hole 71 and the guide pins 72 and 73.

The eject lever 70 integrally has an engaging projection 74 formed by bending the upper end of the eject lever 70 toward the cartridge chamber 32 by 90 °. The engagement protrusion 74 allows the film cartridge 1 to be held in the cartridge chamber 32.
When it is inserted into the film cartridge 1, it is arranged at a position where it can abut the corresponding end surface 13 of the film cartridge 1. The eject lever 70 is biased by a tension spring (biasing means) 77 below the camera 30, that is, in the direction of pushing out the film cartridge 1.

The opening / closing lid 50 is integrally provided with a cam plate member (cam member) 80 having a predetermined shape and located near one end of the shaft 49 on the side closer to the eject lever 70. The cam plate member 80 extends in a direction substantially orthogonal to the shaft 49, and its edge portion is formed as a cam surface 81. On the cam surface 81, the eject lever 7
The lower end 75 of 0 is always in elastic contact.

As shown in FIGS. 3 and 4, the cam surface 81
Includes a first cam surface 81a whose one end 81c contacts the inner surface 50b of the opening / closing lid 50, and the other end 81 of the first cam surface 81a.
The second cam surface 81b is formed continuously from d. The first cam surface 81a is formed such that the entire area thereof is positioned equidistant from the shaft 49. That is, the first cam surface 81 a is formed such that the entire area thereof is located on the same circumference centered on the shaft 49. On the other hand, the second cam surface 8
1b moves toward the shaft 49 as it moves away from the other end 81d of the first cam surface 81b, that is, one end of the second cam surface 81b.
The shape is close to. The other end 81e of the second cam surface 81b is closest to the shaft 49 in the cam surface 81.

From the above structure, the position on the cam surface 81 where the lower end 75 of the eject lever 70 elastically contacts varies depending on the rotational position (angular position) of the opening / closing lid 50 about the shaft 49. For example, when the opening / closing lid 50 shown in FIG. 2 is closed, the lower end portion 75 of the eject lever 70 makes elastic contact with the first cam surface 81a. On the other hand, in the state where the opening / closing lid 50 shown in FIG. 1 is opened, the lower end portion 75 of the eject lever 70 is
It elastically contacts the second cam surface 81b.

When the lower end portion 75 is in elastic contact with the first cam surface 81a, the eject lever 70 is at the position shown in FIG.
A position such that the engaging protrusions 74 lightly abut the corresponding end surface 13 of the film cartridge 1 when loaded in the
That is, in the same state, the end surface 13 to which the engaging protrusion 74 corresponds
, But the film cartridge 1 is not pushed out of the cartridge chamber 32. Therefore, the distance from the first cam surface 81a to the shaft 49 is set to a predetermined distance in consideration of the length of the eject lever 70 and the like. The lower end 75 is the first cam surface 8
The engaging protrusion 74 of the eject lever 70 may be positioned above the end surface 13 that does not contact the corresponding end surface 13 of the film cartridge 1 when the eject lever 70 is elastically contacting the la 1a. In short, the lower end portion 75 has the first cam surface 81a.
It suffices that the eject lever 70 is arranged at a position where the engaging protrusion 74 does not come into contact with the end face 13 to push the film cartridge 1 out of the cartridge chamber 32 when the eject lever 70 is elastically contacted with.

The open / close lid 5 in the closed state shown in FIG.
When 0 is opened, the cam surface 8 of the lower end portion 75 of the eject lever 70 increases as the opening degree of the opening / closing lid 50 increases.
The elastic contact on No. 1 moves from the position on the first cam surface 81a shown in FIG. 4 toward the other end 81e of the second cam surface 81b. The lower end 75 has the first cam surface 81a (one end 81c).
Since the distance from the shaft 49 is constant, the eject lever 70 does not move while it is in elastic contact with the other end portion 81d). The elastic contact of the lower end portion 75 on the cam surface 81 is the other end portion 81d of the first cam surface 81a (one end portion of the second cam surface 81b).
As it moves toward the other end portion 81e of the second cam surface 81b over the distance, due to the shape of the second cam surface 81b and the biasing force of the tension spring 77 described above, the eject lever 7
0 moves downward of the camera 30. Open / close lid 50
The eject lever 70
When the opening / closing lid 50 moves to the open end beyond the above predetermined opening without moving, the interlocking mechanism for interlocking the eject lever 70 in the direction of pushing out the film cartridge 1 includes a tension spring 77 and a cam plate member 80. Has become.

The camera 30 having the film cartridge eject mechanism having the above structure operates as follows. The film cartridge 1 has an opening / closing lid 5 shown in FIG.
It is inserted into the cartridge chamber 32 when 0 is open. At this time, first, the film cartridge 1 is manually inserted into the cartridge chamber 32 until the corresponding end surface 13 of the film cartridge 1 comes into contact with the engaging protrusion 74 of the eject lever 70, and then the opening / closing lid 50 is manually inserted. While closing, the film cartridge 1 is pushed into the cartridge chamber 32. Film cartridge 1
As is pushed into the cartridge chamber 32, the eject lever 70 moves upward from the camera 30 from the position shown in FIG. 1 to the position shown in FIG. At the same time, the driver 51 is fitted into the one key groove 19b of the film cartridge 1.

Thereafter, in order to lock the opening / closing lid 50,
Manually lock the opening / closing knob 55 with the locking claw 53a
Turn in the direction to engage a. Then, the interlocking arm 53 also rotates in the same direction, so that the fork portion 53b moves toward the engaging arm portion 60.
a is moved from left to right in FIG. 1, 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.
1 rotates clockwise in FIG. By this rotation, the driver 51 opens the light blocking door 19 of the film cartridge 1. The film in the film cartridge 1 is fed toward the spool chamber 33 by a film feeding mechanism (not shown) when the light shielding door 19 is opened, and the loading of the film is completed.

When the film cartridge 1 is taken out from the cartridge chamber 32 after the film has been completely wound up in the film cartridge 1 after a series of photographing is finished, first, the opening / closing knob 55 is manually locked.
3a is rotated in a direction to release the engagement with the engaging portion 50a. Then, the interlocking arm 53 also rotates in the same direction, whereby the fork portion 53b moves the engaging arm portion 60a from right to left in FIG. 2, and as a result, the relay lever 60 rotates in the clockwise direction in FIG. The rotation of the relay lever 60 is performed by the fan-shaped gear portion 6
0b and the gear portion 51b are transmitted to the driver 51, which causes the driver 51 to rotate in the clockwise direction in FIG. By this rotation, the driver 51 closes the light blocking door 19 of the film cartridge 1.

When the lock claw 53a is disengaged from the engaging portion 50a, the opening / closing lid 50 can be opened.
The opening / closing lid 50 is opened manually. A predetermined opening degree of the opening / closing lid 50 (the lower end portion 75 of the eject lever 70 is attached to the first cam surface 8).
During the opening operation up to the opening degree of the opening / closing lid 50 when it abuts the other end portion 81d of 1a, the eject lever 70 does not move due to the shape of the first cam surface 81a. When the opening / closing lid 50 is opened beyond the predetermined opening, the shape of the second cam surface 81b and the tension spring 7 are moved according to the opening operation of the opening / closing lid 50.
The urging force of 7 causes the eject lever 70 to move downward of the camera 30. Simultaneously with this movement, the engaging protrusions 74 move downward, so that the film cartridge 1 is discharged from the cartridge chamber 32 to the outside with the engaging protrusions 74 abutting the corresponding end faces 13.

As described above, the camera 3 to which the present invention is applied
According to the film cartridge ejecting mechanism of No. 0, the film cartridge 1 is not ejected unless the opening / closing lid 50 is opened to a predetermined opening or more, so that the film cartridge 1 does not pop out as soon as the opening / closing lid 50 is opened. . The film cartridge eject mechanism of the present invention is easy to manufacture because it has a simple structure in which the eject lever 70, the tension spring 77, the cam plate member 80 and the like are provided.

Although the cam plate member 80 has been described as the cam member in the above embodiment, the present invention is not limited to this, and the eject lever 70 is moved downward unless the opening / closing lid 50 is opened beyond a predetermined opening. Other cam members may be used as long as they have a cam surface having a shape that does not allow the above.

In the above embodiment, the film cartridge is used as a film cartridge in US Pat.
Although the film cartridge of the type known from Japanese Patent No. 296,887 has been described, it goes without saying that the present invention can be applied to a camera using a film cartridge of another type.

[0029]

As described above, according to the camera having the film cartridge ejecting mechanism of the present invention, the opening / closing lid is not moved during the opening operation of the opening / closing lid to the predetermined opening degree, and the opening / closing lid is opened by the predetermined opening. Since the eject lever is interlocked with the direction to push out the film cartridge when moving to the open end beyond the limit, the cartridge does not jump out as soon as the opening / closing lid is opened, and thus the cartridge can be easily taken out. . Further, since the structure is simple, it is easy to manufacture and can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a camera provided with a film cartridge eject mechanism of the present invention.

FIG. 2 is a perspective view showing the main part in a state different from the state shown in FIG.

FIG. 3 is a view showing the opening / closing lid in the opened state shown in FIG.

FIG. 4 is a view showing the opening / closing lid in the closed state shown in FIG.

FIG. 5 is a vertical cross-sectional view of a camera equipped with the film cartridge light shielding door open / close detection device of the present invention.

FIG. 6 is a perspective external view of a film cartridge.

FIG. 7 is a perspective external view of the film cartridge of FIG. 7 viewed from different angles.

[Explanation of symbols]

 1 Film Cartridge 3 Cartridge Outer Frame 11 Spool (Film Winding Spool) 17 Film Ejection / Inlet Opening 19 Light-shielding Door 19a Shaft 19b Key Groove 21 Hole 30 Camera 31 Spool Chamber 32 Cartridge Chamber 47 Loading Port 49 Shaft 50 Open / Close Lid 51 Driver 53 Interlocking arm 55 Open / close knob 60 Relay lever 70 Eject lever 71 Guide elongated hole 72 73 Guide pin 75 Lower end 77 Tension spring (biasing member) 80 Cam plate member (cam member) 81 Cam surface 81a First cam surface 81b Second cam surface

Claims (4)

[Claims] 1. A camera having a cartridge chamber in which a film cartridge having a film take-up spool inside is loaded along the axial direction of the film take-up spool, and an opening / closing lid for opening and closing one end of the cartridge chamber; An eject lever that is movably supported in a direction parallel to the axial direction of the chamber and a part of which contacts the film cartridge in the cartridge chamber; the eject lever is not moved during the opening operation of the opening / closing lid to a predetermined opening, A camera provided with a film cartridge ejecting mechanism, comprising: an interlocking mechanism that interlocks the ejecting lever in a direction of pushing out the film cartridge when the opening / closing lid moves to the open end beyond the predetermined opening. 2. The cam member provided on the back cover according to claim 1, wherein the interlocking mechanism has an urging means for urging the eject lever in a direction of pushing out the film cartridge; and a cam surface having a cam surface with which the eject lever elastically contacts. And;
A camera equipped with a film cartridge eject mechanism. 3. The cam member according to claim 2, wherein the cam member is a plate member extending in a direction substantially orthogonal to a rotating shaft that rotatably supports the back cover, and the cam surface is provided on an edge portion of the plate member. A camera with a formed film cartridge eject mechanism. 4. The cam surface according to claim 2 or 3,
A first cam surface which is formed by a continuous cam surface corresponding to a rotation range between the closed position and the open position of the back lid and which does not substantially move the eject lever; and the eject lever adjacent to the first cam surface. A second cam surface that permits movement;
A camera equipped with a film cartridge eject mechanism.