JPH03200132A - camera - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention is directed to a film roller that is disposed near a spool chamber and is equipped with a pressure roller that presses the film between the spool and the spool to assist film winding. This invention relates to a camera that uses a cartridge housing housed within the housing, and particularly relates to an autoloading operation.

(Background of the Invention) In recent years, it has become cumbersome to set the leading edge of the film protruding from the film cartridge onto the take-up spool, etc.
To avoid the risk of accidentally pulling the leading edge of the film, which may expose the film and make that part unusable, remove the cartridge case with the film completely rolled into the case from the side of the camera. A system has been proposed (US Pat. No. 4,841,319, etc.) in which the film is inserted into the housing and pushed out from within the housing by a fork drive.

In addition, as one of the conventional methods for winding a film onto a spool, as shown in FIG. The back cover 103
A presser roller 104 fixed to the
A method in which the film 101 is pressed into contact with a rubber cylinder 105 provided on the outer peripheral surface of the spool 1.2, and the spool is then driven to start the film winding operation (auto loading (AL)). There is. Furthermore, the first
In Figure 3, 106 is the camera body, 107 is the presser roller, 1
08 is a spool chamber.

Therefore, as a film cartridge, we use the above-mentioned cartridge case that is inserted from the side of the camera body instead of opening the back cover, and wind the film 101 onto the spool 102 using a presser roller 104 as shown in FIG. If a camera is configured to perform this method, the following problems will occur.

That is, the film 101 passes through the averger tunnel by the fork drive and enters the spool chamber 108, but since the presser roller 104 is in pressure contact with the rubber tube 105 of the spool 102, the film is held between them. There is no force for the tip part 10]a of 101 to enter,
As a result, the tip end 101a is bent as shown in FIG. 14, and the autoloading operation cannot be performed properly.

(Object of the Invention) The object of the present invention is to solve the above-mentioned problems, and to provide a system using a cartridge case that stores all of the film.
To provide a camera that can perform reliable autoloading.

(Characteristics of the Invention) In order to achieve the above object, the present invention includes a release means for releasing the pressed state between the pressure roller and the spool, a detection means for detecting that a predetermined amount of film has entered the spool chamber, and an automatic and a control means for operating the release means immediately after the start of loading until the detection by the detection means is performed, so that the control means operates the release means immediately after the start of loading until the film enters the spool chamber by a predetermined amount. The feature is that the pressure roller and the spool are released from the pressed state during this period.

(Embodiments of the Invention) Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIG. 1 shows an embodiment of the present invention, and in the figure, 1
2 is a camera body, 2 is a spool, 3 is a rubber tube provided on the outer periphery of the spool, and 4 is a press roller supported by a shaft 4a. Reference numeral 5 designates a roller plate that holds the presser roller 4 at one end, and has a spring hook portion 5a on which a spring 6 is applied and a curved portion 5b at the other end, and is rotatable around a shaft 7. ing. A plunger 8 has a yoke 8a that slides vertically (in the direction of the arrow) in the figure, and the yoke 8a engages with the curved portion 5b of the roller plate 5. 9 is the axis 9a
A presser roller 10 is rotatably held on a shaft 11, and the presser roller 9 is rotatably supported on the tip of the presser roller 10.
, and is urged toward the spool by a spring (not shown). 12 is a film, 12a is its tip, and 13 is a spool chamber.

FIG. 2 is a block diagram showing one embodiment of the present invention, in which 14 is a control circuit that controls various operations of the camera; 15 is a control circuit that controls various operations of the camera;
16 is a timer; 17 is a switch that is turned on when the cartridge case (not shown) is inserted into the cartridge chamber of the camera; and 18 is a battery, which is a power source. It is.

Next, the operation during autoloading will be explained using FIGS. 3 and 4.

When the cartridge case is inserted into the cartridge chamber (not shown), the switch 17 is turned on (step 51). Then,
The plunger 8 is energized by the control circuit 14 (step 52). As a result, the yoke 8a is attracted and slides upward in the figure as shown in FIG.
rotates counterclockwise about the shaft 7, resulting in the state shown in FIG. That is, the press roller 4 and the rubber cylinder 3 are released from the pressed state. Next, the control circuit 14 operates the timer 16,
Almost at the same time, the film feeding motor 15 is driven to start pushing out the film 12 from the cartridge case to the spool chamber 13 (in the direction of the arrow in FIG. 1) (steps 53 and 54). Thereafter, when the count content of the timer 16 reaches a predetermined value, that is, when the time when the leading end 12a of the film 12 would have reached the state shown in FIG. 1 has elapsed (step 55), the plan The power supply to the jar 8 is cut off (step 56). As a result, the suction state of the yoke 8a is released, and the roller plate 5 rotates clockwise about the shaft 7 according to the bias of the spring 6, and the yoke 8a slides in the direction of arrow C in FIG. 4 at this time.)
As a result, as shown in FIG. 4, the film 12 is pressed against the presser roller 4 and the rubber tube 3, and the spool 2 is pressed against the arrow B in FIG.
The film 12 is wound around the spool 2 as the direction rotates.

The above ensures that the autoloading operation is performed reliably.

5 and 6 show a second embodiment of the present invention, and the same parts as in FIGS. 1 and 2 are given the same reference numerals.

In FIGS. 5 and 6, 19 is a switch that is turned on when pressed by a lever described later, and 20 is a film 12.
a lever that rotates around a shaft 20a according to the pressure of the tip 12a of the lever; 21 is a spring having a biasing force weaker than the pressing force of the film 12, which always biases the lever 20 in a counterclockwise direction; 22 is a stopper that restricts the clockwise rotation of the lever 20.

Next, the operation during autoloading will be explained using FIGS. 7 and 8.

When the cartridge case is inserted into the cartridge chamber (not shown), the switch 17 is turned on (step 61). Then,
The plunger 8 is energized by the control circuit 14 (
Step 62). As a result, the yoke 8a is attracted and slides upward in the figure as shown in FIG. It rotates in the direction shown in FIG. 5. That is, the press roller 4 and the rubber cylinder 3 are released from the pressed state. Next, the control circuit 14 controls the film feeding motor 15.
is started to push out the film 12 from the cartridge case to the spool chamber 13 (step 63).

After that, the leading end 12a of the film 12 is inserted into the spool chamber 13.
When the user enters the room and presses the lever 20, the switch 19 is turned on (step 64). Then, control circuit 1
4 cuts off the power to the plunger 8 (step 65
). As a result, the suction state of the yoke 8a is released, and the roller plate 5 rotates clockwise about the shaft 7 according to the bias of the spring 6. As a result, as shown in FIG.
2 is pressed against the presser roller 4 and the rubber tube 3, and as the spool 2 rotates, the film 12 is wound around the spool 2.

9 to 10 show a third embodiment of the present invention, and the same parts as in FIGS. 1.2 are designated by the same reference numerals.

In FIG. 9.10, 23 is a light emitting IRED, and 24 is a light receiving sensor that is placed in the hole la and receives the light from the light emitting IRED 23, and these are provided at the positions shown in FIG. ing.

Next, the operation during autoloading will be explained using FIG. 11 and FIG. 12.

When the cartridge case is inserted into the cartridge chamber (not shown), the switch 17 is turned on (step 71). Then,
The plunger 8 is energized by the control circuit 14 (step 72). As a result, the yoke 8a is attracted and slides upward in the figure as shown in FIG.
rotates counterclockwise about the shaft 7, resulting in the state shown in FIG. That is, the press roller 4 and the rubber cylinder 3 are released from the pressed state. Next, the control circuit 14 drives the light projection IRED 23 and also drives the film feeding motor 15 to start pushing out the film 12 from the cartridge case to the spool chamber 13 (Stella 7'73, 74). Thereafter, when the leading end 12a of the film 12 enters the light emitting/receiving space, the light receiving signal from the light receiving sensor 23 is no longer input to the control circuit 14 (step 75), and when this is detected, the control circuit 14 Cut off the power to plunger 8 (
Step 76), as a result, the suction state of the yoke 8a is released, and the roller plate 5 is biased by the spring 6 to the shaft 7.
As a result, as shown in FIG. 12, the film 12 is pressed against the presser roller 4 and the rubber cylinder 3, and as the spool 2 rotates, the film 12 is pressed against the spool 2.
2 will be rolled up and 1 will be added.

According to this embodiment, at the start of autoloading, the presser roller 4 is separated from the spool 2 until the film 12 enters the spool chamber 13 and reaches the spool 2, which is different from the conventional structure. It is now possible to reliably ink a new cartridge case with autorope ink without changing much.

(Correspondence between the invention and the embodiments) In this embodiment, the plunger 8 is used as the release means of the invention, and the timer 16 and the control circuit 14 or the switch 19.
Lever 20 and control circuit 14, or light emitting IRED 23
, the light receiving sensor 24 and the control circuit 14 correspond to a detection means, and the control circuit 14 corresponds to a control means.

(Effects of the Invention) As explained above, according to the present invention, there is provided a releasing means for releasing the pressed state between the pressure roller and the spool, a detecting means for detecting that a predetermined amount of film has entered the spool chamber, and an automatic and a control means for operating the release means immediately after the start of loading until the detection by the detection means is performed, so that the control means operates the release means immediately after the start of loading until the film enters the spool chamber by a predetermined amount. During this period, the press roller and spool are released from the pressed state, so that reliable autoloading can be performed.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the spool chamber showing the first embodiment of the present invention, Fig. 2 is a block diagram of the electric circuit, Fig. 3 is a flowchart showing its operation, and Fig. 4 shows that the presser roller is in its original state. Cross-sectional view of the spool chamber when it has returned to its position,
FIG. 5 is a sectional view of the spool chamber showing the second embodiment of the present invention, FIG. 6 is a block diagram of the electric circuit, FIG. 7 is a flowchart showing the operation, and FIG. Cross-sectional view of the spool chamber when it has returned to its position,
FIG. 9 is a cross-sectional view of the spool chamber showing a third embodiment of the present invention;
FIG. 1O is a block diagram of the electric circuit, and FIG. 11 is a block diagram showing the operation thereof (FIGS. 3 to 14 are cross-sectional views of the spool chamber for explaining the conventional example. Spool, 3...Rubber tube, 4.
...Press roller, 8...Plunger
12... Film, 13... Spool chamber, 14... Control circuit, 16... Timer, 17... Switch, 19... ... Switch, 20 ... Lever, 23 ... Light emitting IRED, 24 ... Light receiving sensor. Figure 4

Claims (1)

[Claims] (1) In a camera that uses a cartridge housing that houses all of the film, the camera is equipped with a press roller that is placed near the spool chamber and that presses the film between the spool and the spool to assist film winding. a release means for releasing the pressure contact state with the spool chamber; a detection means for detecting that a predetermined amount of film has entered the spool chamber; A camera characterized in that it is provided with a control means for controlling the camera.