JPH086152A - Film leader positioning device - Google Patents

Abstract

PURPOSE:To make a film leader positioning device applicable even in the case a cartridge chamber is installed on a light shielding cover side, and also, to attain the miniaturization of a camera by reducing the number of components, as for a film leader positioning device arranged in an easy film loading system camera. CONSTITUTION:A positioning arm 18 is rotatably supported on the wall part 17 of the cartridge chamber 14 installed on the side of the light shielding cover 17. A groove 26 is formed on the wall surface 25 on the side of the camera main body 12 so as to be engaged with a pin 22 attached to one end of the positioning arm 18. When a film cartridge 1 is loaded in the cartridge chamber 14 and the light shielding cover 13 is closed, the pin 22 is engaged with the groove 26 in the process of closing the cover 13, and when the light shielding cover 13 is furthermore closed, the pin 22 is moved along the groove 26, then, the prescribed positioning movement is carried out by the positioning arm 18 in accordance with the operation of closing the light shielding cover 13, then, the film leader 2 is positioned on a prescribed position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film simple loading type camera for loading a film cartridge by dropping the film cartridge in an axial direction in a cartridge room opened with a light-shielding lid of the camera. The present invention relates to a film reader positioning device that positions a leader at a predetermined position as a light-shielding lid is closed.

[0002]

2. Description of the Related Art A simple film loading type camera of this type is such that a film cartridge is loaded into a cartridge chamber opened by opening a light-shielding lid, and then the film loading is completed only by closing the light-shielding lid. The film reader of Patrone is structured so that it can be automatically wound up by the film feeding device of the camera onto the take-up spool on the camera body side. If it is deviated from the position of, the film leader may not be able to be wound around the winding spool. Therefore, a camera of this type is conventionally provided with a positioning device for positioning the film reader so that the film reader is surely in a predetermined position when the light-shielding lid is closed.

[0003]

As a positioning device of this type, in a camera in which a cartridge chamber is provided on the camera body side, a wedge-shaped projection is provided on the light-shielding lid side, and when the light-shielding lid is closed, the wedge-shaped projection is formed. It is known that the taper surface of the projection of the film pushes the film leader downward while sliding against the upper edge of the film leader, and the film reader can be positioned at a predetermined position when the light shielding lid is completely closed. Has been. This positioning device has the advantage of being extremely simple in construction and being able to be installed in a camera at low cost. However, as described in Japanese Patent Application Laid-Open No. 57-109931, the cartridge chamber has a light-shielding lid side. It has a drawback that it cannot be applied to the camera provided in the.

That is, in order to secure the function of gradually pushing down the film leader while slidingly contacting the wedge-shaped projection with the upper edge of the film leader, the tapered surface is lengthened to some extent, that is, the height of the projection is increased to some extent. It needs to be high. If the cartridge chamber is on the camera body side, a wedge-shaped protrusion may be provided on the light-shielding lid side. In this case, even if the height of the protrusion is increased to some extent, when the light-shielding lid is closed, this protrusion is on the camera body side. There is no problem because it will be accommodated. However, if the cartridge chamber is on the side of the light shielding lid, a wedge-shaped protrusion must be provided on the camera body side. In this case, there is not enough space for accommodating the protrusion on the side of the light shielding lid. It cannot be raised high enough. For such a reason, the positioning device including the wedge-shaped protrusion cannot be applied to the camera in which the cartridge chamber is provided on the light-shielding lid side.

As a film reader positioning device that can be applied to a camera in which a cartridge chamber is provided on the light-shielding lid side, a device described in JP-A-57-201222 is known. However, this positioning device has a problem in that it has many components and a complicated mechanism, and requires a considerable installation space, which hinders downsizing and weight saving of the camera.

The present invention has been made in view of the above circumstances, and an object thereof is to be applied to a camera in which a patrone chamber is provided on the side of a light-shielding lid, and has a small number of components and a simple mechanism. An object of the present invention is to provide a positioning device for a film reader, which can reduce the size and weight of a camera.

[0007]

In order to achieve the above object, the first film leader positioning apparatus of the present invention comprises a moving member that moves with the closing operation of the light shielding lid when closing the cartridge chamber, and the moving member. To one of the approaching members that relatively approaches the film reader, a preparation position separated upward from the upper edge of the film leader and an operation position capable of moving the film leader to a predetermined position by pressing the upper edge downward. A positioning member that can reciprocate between the positioning members is provided, and on the other hand, a displacement imparting member that displaces the positioning member in the process of closing the light shielding lid is disposed. It is characterized in that it is moved from the preparation position to the operating position.

As a specific example of the moving member, the cartridge chamber or the light shielding lid when the cartridge chamber is provided on the light shielding lid side or when the light shielding lid and the camera body are provided separately, or the camera chamber is An example is a light-shielding lid provided on the main body side.

As a specific example of the approaching member, a camera body in the case where the cartridge chamber is provided on the light shielding lid side,
Alternatively, the cartridge chamber and the camera body may be used when the cartridge chamber is provided on the camera body side or when the camera body and the light shielding lid are provided separately.

As a specific mode of the first camera, the second film reader positioning device of the present invention has a cartridge chamber provided on the light-shielding lid side and a positioning member rotatably provided on the light-shielding lid side. And the displacement imparting member is a groove provided with a guide surface, and the rotation arm is provided with a pin that engages in the groove and is in sliding contact with the guide surface in the groove. It is a feature.

A third film reader positioning device of the present invention is the same as the second camera structure, wherein the pin provided on the rotary arm is configured so that the protruding length thereof can be changed and is directed into the groove. It is characterized by being urged.

[0012]

In the first film reader positioning apparatus of the present invention, the positioning member provided on either the moving member or the approaching member is provided on the other in the process of closing the light shielding lid. By contacting the displacement imparting member, the light-shielding lid is closed to move from the preparatory position to the operating position, and at the time of this movement, the upper edge of the film leader is pressed downward to set the film leader to a predetermined position. Position to position.

The positioning member is constructed so as to be movable between a preparation position separated from the upper edge of the film reader and an operating position where the film reader can be positioned, and in the thickness direction of the camera like a conventional wedge-shaped projection. This positioning device can be applied to a camera in which the cartridge chamber is provided on the side of the light-shielding lid because it does not require an extending structure.

Further, the positioning member slides in contact with the displacement applying member in the process of closing the light-shielding lid, and the positioning movement is performed in accordance with the operation of closing the light-shielding lid. The mechanism can be made very few and the installation space is small, so the camera can be made smaller and lighter.

According to the second film reader positioning apparatus of the present invention, the rotating arm as the positioning member is
Since it is provided on the light-shielding lid side together with the patrone chamber, the alignment of the film reader and the pivoting arm is easier than when the pivot arm is provided on the opposite side to the side where the patrone chamber is provided. In addition, it is possible to perform it accurately.

According to the third film reader positioning apparatus of the present invention, the pin provided on the rotating arm is constructed so that its protruding length can be changed, and is biased toward the groove. This makes it possible to surely engage the pin in the groove.

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a plan view showing a state in which a light shielding lid of a camera having a film reader positioning device according to an embodiment of the present invention is opened, and FIG. 2 is an exploded perspective view of the camera shown in FIG.

The illustrated camera 10 is provided with a camera body 12 having a lens 11 on the front surface thereof, and a light-shielding lid 13 rotatably supported on the left side edge portion of the back surface of the camera body 12, and the light-shielding lid 13 side is provided on the side thereof. A cartridge chamber 14 and a pressure plate 15 are provided. Further, a film guide 16 whose one end 16a is axially supported by the left edge of the camera body 12 is arranged in front of the pressure plate 15 on the side of the light shield lid 13 (close to the camera body 12). The film leader 2 of the film cartridge 1 which is dropped and loaded in the cartridge chamber 14 opened in the direction of the spool axis is inserted into the slit between the film guide 16 and the pressure plate 15 while being guided by the film guide 16. It is designed to be retained.

FIG. 3 is a perspective view of the light-shielding cover as seen from the camera body side, FIG. 4 is an exploded perspective view thereof, and FIG. 5 is a sectional view taken along line VV in FIG.

As shown in FIGS. 3 and 4, a positioning member 18 serving as a positioning member and a rotating arm is supported by a wall portion 17 constituting the cartridge chamber 14 so as to be rotatable around a rotating shaft 19. Has been done. A claw portion 18a is formed at one end of the positioning arm 18, and the claw portion 18a is formed on the upper end of the film leader 2 inserted between the film guide 16 and the pressure plate 15 by the rotation of the positioning arm 18. So that it can be moved between a preparation position (position shown in FIG. 3) that is a predetermined distance from and a working position (described later) that can move the film leader 2 to a predetermined reference position by pressing the upper end of the film leader 2 downward. Is configured.

In the vicinity of the positioning arm 18, a leaf spring 20 for urging the positioning arm 18 in the counterclockwise direction in the figure, and to prevent the positioning arm 18 from rotating counterclockwise beyond the state shown in FIG. A stopper 21 is provided, and the positioning arm 18 is held at the reference position shown in FIG. 3 by the action of the leaf spring 20 and the stopper 21 when the light shielding lid 13 is opened. Further, an insertion hole 18b is provided at the other end of the positioning arm 18, and a pin 22 is inserted into this insertion hole 18b so that the protruding length from the insertion hole 18b can be changed. Further, a recess 23 extending in the up-down direction is formed in a portion of the wall portion 17 facing the pin 22.
As shown in FIG. 5, a leaf spring 24 for urging the pin 22 in the projecting direction is mounted in the recess 23.

On the other hand, as shown in FIG. 2, on the camera body 12 side, when the light shielding lid 13 is closed, the wall portion of the cartridge chamber 14 is closed.
A groove 26 as a displacement imparting member that engages with the pin 22 of the positioning arm 18 in the process of closing the light shielding lid 13 is formed on the wall surface 25 facing the wall 17. The groove 26 is composed of a wide receiving portion 26a formed near the light-shielding lid 13 and a narrow guide portion 26b extending from the receiving portion 26a toward the front of the camera 10 while bending.

The operation of the positioning arm 18 will be described below with reference to FIGS. 6 to 9. When the light shielding lid 13 is closed from the state shown in FIG. 1, that is, the state where the film cartridge 1 is loaded in the cartridge chamber 14, as shown in FIG. It is received in the receiving portion 26a. When the light-blocking lid 13 is further closed, the pin 22 enters into the guide portion 26b of the groove 26 and is guided.
It moves in the guide portion 26b while slidingly contacting the guide surface of 26b.
As shown in FIGS. 7 and 8, when the pin 22 moves along the upwardly inclined guide surface of the guide portion 26b in the process of closing the light shielding lid 13, the positioning arm 18 follows the closing operation of the light shielding lid 13. Then, it rotates counterclockwise, and the claw portion 18a pushes the upper edge of the film leader 2 downward. The pressed film leader 2 is moved downward and positioned to a reference position where its lower end contacts a film stopper 27 formed in the lower part of the film guide 16 as shown in FIG. The position of the positioning arm 18 shown in FIG. 8 is the operating position in this embodiment.

As shown in FIG. 9, when the light shielding lid 13 is further closed and the pin 22 moves along the downwardly inclined guide surface of the guide portion 26b, the positioning arm 18 causes the light shielding lid 13 to further close. Following this, it rotates clockwise and the claw portion 18b separates from the upper end of the film reader 2. This prevents contact between the film and the positioning arm 18 during film feeding. As shown in FIG. 1, the depth of the groove 26 becomes deeper toward the front of the camera 10 so as to follow the orbit of the pin 22 when the light-shielding lid 13 is opened and closed. Is not set to fit the orbit of. However, since the pin 22 has a variable projecting length as described above and is urged toward the inside of the groove 26 by the leaf spring 24, the pin 22 is securely engaged with the groove 26 during the closing operation of the light shielding lid 13. You can move along the guideway.

Although one embodiment of the present invention has been described above, the present invention is not limited to the specific mode of the embodiment, and various modifications can be made.

For example, in the above embodiment, the groove is formed on the camera body side and the pin engaging with the groove is formed on the positioning arm side. However, the groove is formed on the positioning arm side.
A pin may be formed on the camera body side. Further, it is possible to adopt a mode in which the positioning arm is provided on the camera body side, and it is also possible to adopt a mode in which a positioning member that slides is provided instead of a positioning member that rotates like the positioning arm.

Further, although the camera of the above embodiment is provided with the cartridge chamber on the side of the light-shielding lid, the present invention provides a camera having the cartridge chamber on the camera body side, or the cartridge chamber is separate from the camera body and the light-shielding lid. Needless to say, the present invention can be applied to a camera configured as described above and capable of being taken in and out from the camera body.

[Brief description of drawings]

FIG. 1 is a plan view of a camera including a positioning device for a film reader according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a camera

FIG. 3 is a perspective view of a light shielding lid.

FIG. 4 is an exploded perspective view of a light shielding lid.

5 is an enlarged cross-sectional view taken along line V-V in FIG.

FIG. 6 is a diagram showing an operation of a positioning arm associated with a closing operation of a light shielding lid.

FIG. 7 is a diagram showing the operation of the positioning arm associated with the closing operation of the light shielding lid.

FIG. 8 is a diagram showing an operation of a positioning arm associated with a closing operation of a light shielding lid.

FIG. 9 is a diagram showing the operation of the positioning arm associated with the closing operation of the light shielding lid.

[Explanation of symbols]

 1 film patrone 2 film reader 10 camera 12 camera body 13 light-shielding lid 14 patrone chamber 15 pressure plate 16 film guide 18 positioning arm 20, 23 leaf spring 22 pin 26 groove

Claims (3)

[Claims] 1. A film leader of a film cartridge loaded into a cartridge chamber opened by opening a light-shielding lid of a camera in the spool axis direction and positioning the film leader in a predetermined position as the light-shielding lid is closed. In a positioning device for a film reader, when closing the cartridge chamber, one of a moving member that moves with the closing operation of the light-shielding lid and an approaching member that relatively approaches the moving member is attached to the film reader. A positioning member is provided which is capable of reciprocating between a preparation position separated upward from the upper edge and an operating position capable of pressing the upper edge downward to move the film leader to a predetermined position. A displacement imparting member that displaces the positioning member in the process of closing the lid is provided, and by the contact between the positioning member and the displacement imparting member, ,
A positioning device for a film reader, wherein the positioning member is displaced from the preparation position to the operating position. 2. The cartridge chamber is provided on the light shielding lid side, the positioning member is a rotating arm rotatably provided on the light shielding lid side, and the displacement imparting member has a guide surface. 2. The film reader positioning device according to claim 1, wherein the rotating arm is provided with a pin that engages in the groove and is in sliding contact with a guide surface in the groove. 3. The film reader positioning device according to claim 2, wherein the pin is configured so as to be capable of changing a protruding length and is biased toward the groove.