JPH0473855B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a winding signal transmission device for a camera, and in particular transmits a signal indicating completion or incomplete winding on the film back side of a camera in which film backs can be exchanged. The present invention relates to a winding signal transmitting device which transmits a signal indicating completion or incompleteness of operation on the camera body side to the film back side as well as to the camera body side.

[Conventional technology]

Conventionally, a winding signal transmitting device for a camera capable of replacing a filmback has two positions of a signal transmitting member corresponding to completion and incomplete winding on the filmback side.
The signal transmission member on the camera body side detects this and determines whether winding is possible on the camera body side, and the winding signal transmission member, which is activated by displacement of the release member, shutter drive member, etc. on the camera body side, is sent to the film back side. By transmitting the signal to the hoisting signal transmission member,
It was determined whether or not the film could be wound (for example, Japanese Utility Model Application No. 163124/1983).

[Problem that the invention seeks to solve]

However, in the case of the winding signal transmission device for such a conventional camera, only two positions of the winding signal transmission member on the film back side are used to determine whether or not winding is possible on the camera body side. When removing the film back from the main body,
The signal transmitting member on the film back side releases the pressure on the winding signal transmitting member on the camera body side, resulting in the same state as when winding is not completed on the film back side, and the winding stop on the camera body side is not effective. This had the disadvantage that the release operation was impossible.

This results in the user not being able to perform the release operation to check the operation before taking a picture, especially in cold weather or when the camera has not been used for a long time. There was a problem in that the user could not be sure whether the device was working properly or not, giving the user a significant sense of anxiety.

Additionally, there was an inconvenience for manufacturers as they were unable to test the operation of the finished product without using a special jig.

Furthermore, if the film back is a photosensitive material that does not require winding, such as a dry plate, sheet film, pack film, instant film, etc., and does not have a winding signal transmission member, the release operation may become impossible and photography may not be possible. There was a problem that it was not possible.

In order to solve this problem, a signal member for detecting whether or not a film back is attached to the camera body is provided separately from the above-mentioned winding signal transmitting member, and a signal member is provided to detect whether or not a film back is attached to the camera body. There are some devices that allow the camera body to be fixed at all times, but this requires two signal transmission sections between the camera body and the film back, which not only complicates the structure but also often causes problems. There was also a risk that this could cause a malfunction.

Furthermore, in the case where the winding signal transmission member on the film back side is driven by the operation of the release member to release the film, the release operation force becomes heavy, and the timing for releasing the film and the shutter operation time are also increased. Since it is difficult to match the film back perfectly, there is a drawback that it often causes double exposure or blank feed. In the case of a device in which the winding is released by releasing the winding stop, there are problems such as the force required to drive the signal transmission member affects the shutter operation, which may cause shutter irregularities and timing instability, especially at high-speed seconds. It was hot.

This invention aims to solve such conventional problems.

[Means for solving problems]

Therefore, in the first aspect of the camera winding signal transmitting device according to the present invention, the winding signal transmitting member on the camera body side can move the winding signal transmitting member on the film back side to the winding completion position and the winding release position of the film back side winding signal transmitting member. the first position corresponding to the position and the unfinished hoisting position, respectively;
a second position and a third position, the second position is on the film back side, the second and third positions are opposite to each other with respect to the first position, and the film back is not attached. In this state, the hoisting signal transmission member on the camera body side is in the first position.

In the second aspect of the invention, in addition to this, the winding signal transmission member on the camera body side is driven by a signal driving member that stores energy by winding the camera body.

[Effect]

With the above configuration, when a film back is not attached, the winding signal transmission member on the camera body side is in the first position, allowing normal winding, winding and release operations.

Furthermore, in the second aspect of the invention, the winding signal transmission member on the camera body side is driven by the biasing force of the signal driving member that is provided separately from the shutter driving member and is stored by winding. Accurate and stable shutter operation is possible.

〔Example〕

Embodiments of the present invention will be described below with reference to the attached drawings. However, since the winding wheel train for winding the camera body side and film back side is the same as the conventional one, it will be omitted, and only the winding signal transmission part will be omitted. is shown.

The figures all show an embodiment of the present invention; FIG. 1 shows the winding completed state, FIG. 2 shows the unwinding state, and FIG. 3 shows the winding unfinished state. Further, a virtual line A indicates a joining surface between the camera body 1 and the film back 2.

In the camera body 1, a winding stop plate 101 having a notch 101a is integrally provided with a winding member (not shown) via a shaft 102, and the shutter and the The mirror drive member (in the case of a single-lens reflex camera) is charged and the film of the film bag 2 is wound.

One end 10 is attached to the notch 101a of this stopper plate 101.
A winding lever 103, which is a winding member on the camera body side to which the camera body 3a engages and disengages, is pivotally attached to the camera body 1 with a shaft 104, and is biased by a spring 105 in the clockwise direction in the figure, and the other end 103b is It is engaged with pin 109. This pin 109 is supported by a fixed part by a shaft 106 and rotates counterclockwise in conjunction with winding.
It is implanted in a signal drive member 108 that rotates clockwise by a spring 107 at the time of release.

The stepped portion 108a of the signal driving member 108 is removably engaged with one end 112a of a locking lever 112 which is pivotally connected to a fixed portion by a shaft 110 and biased in the counterclockwise direction in the figure by a spring 111. Stop lever 112
The other end 112b is detachable from a pin 115 of a rotating member 114 that is supported by a shaft 113 and rotates counterclockwise in conjunction with a shutter drive system or mirror lowering system.

A drive pawl 117 is also pivotally attached to the signal drive member 108 via a shaft 116 . This driving claw 117 is
Spring 11 engaged between signal drive member 108
8 gives a left rotation habit, and the bent portion 117a
The rotation is stopped by the tip claw part 1.
17b is a bent portion 121 at one end of the camera body side winding signal transmission member 121 which is pivotally connected by the shaft 119 and held at the neutral position by the neutral spring 120.
It can be freely connected to and disconnected from a.

The bent portion 121b near the other end of the hoisting signal transmission member 121 can be freely engaged with and disengaged from the protrusion 103c of the hoisting lever 103, and the other bent portion 121c
is interlocked with a winding signal transmission member 201 on the film back side, which will be described later.

On the other hand, a winding signal transmission member 201 on the film back side is attached to the film back 2, which is detachably attachable to the camera body 1, through a long hole 201a and a guide shaft 202 so as to be slidable in the horizontal direction as shown in the figure, and a spring 203
is urged in the direction of the camera body 1 by.

Front end bent portion 20 of this hoisting signal transmission member 201
The transmission pin 204 implanted in 1b engages with the bent portion 121c of the hoisting signal transmission member 121 on the camera body side.

Further, the protrusion 2 at the rear end of the hoisting signal transmission member 201
01c is pivotally connected to the film bag 2 by a shaft 205, engages a spring 206, and engages one end of an L-shaped indexing lever 207 that has a left end habit in the figure. Other end bent portion 207a
can be freely engaged with and detached from a known counter indexing plate 208 that rotates within one rotation in conjunction with film winding.

The counter indexing plate 208 has a plurality of teeth 208a and a recess 208b corresponding to the number of shots of the film, and a long hole 208c into which a pin 210 embedded in a counter gear 209 that rotates in conjunction with film winding is loosely fitted. is provided, and a spring 211 is engaged between it and the pin 210, so that it can move forward and backward (rotate) by approximately half the tooth pitch of the counter indexing plate 208 with respect to the rotational direction of the counter gear 209. .

A film stopper lever 212 is pivotally connected to the index lever 207 and the same shaft 205, and a spring 213 is engaged between the index lever 207 and the index lever 207, so that it has a left-handed rotation behavior as shown in the figure.
The protrusion 212b is the bent portion 2 of the index lever 207.
Rotation is locked by contacting 07b, and both levers 207 and 212 are integrated.

Furthermore, a film winding shaft 21 rotates counterclockwise from the camera body side via a winding gear train (not shown).
4, a film stopper wheel 215 is integrally fixed, and the claw portion 21 of the film stopper lever 212 is attached to the teeth of the film stopper wheel 215.
2a can be freely engaged and detached.

A pin 216 is implanted in the above-mentioned indexing lever 207, and one end of an L-shaped winding release lever 218 pivotally mounted on a shaft 217 is engaged with this pin 216, and the other end is engaged with a winding signal. It engages with the bent portion 201b of the transmission member 201.

In addition, if the strength relationship of the springs that are related to each other throughout is listed from the strongest to the strongest, the springs 107, 206,
The order is 203, 105, 120.

This embodiment has the above-mentioned configuration, and Fig. 1 shows a state in which both the camera body 1 side and the film back 2 side have been wound and are ready for photography, and the winding stop plate on the camera body side is shown. 101 is locked to the winding lever 103, and the film back side winding pawl wheel 215 is locked to the film winding lever 212, so that the winding operation is disabled.

Further, the signal drive member 108 on the camera body side is locked by a locking lever 112 and kept in a stored state,
The winding signal transmission member 121 is maintained at a first neutral position by a neutral spring 120, and its bent portion 121b is connected to the protrusion 10 of the wind stop lever 103.
It is located close to 3c.

On the other hand, the bent portion 207a of the indexing lever 207 on the film back side is connected to the recessed portion 207 of the counter indexing plate 208.
08b and is in a left-handed rotation state, and the film stopper lever 212 is held in its claw portion 21 by the spring 213.
2a locks the pawl wheel 215.

When the camera body 1 side is released from this state, the rotating member 114 rotates counterclockwise in conjunction with the operation of the shutter or mirror, as shown in FIG. 2, and the pin 115 is locked at the end of the rotation. Lever 11
2 to the right against the spring 111.

As a result, the signal drive member 108 is released, rotates clockwise by the spring 107, and its pin 1
09 rotates the winding stop lever 103 to the left against the spring 105, and the winding stop plate 101 is unlocked and becomes ready for winding.

At the same time, the claw part 117b of the drive claw 117 presses the bent part 121a, and moves the winding signal transmission member 121 to the left against the neutral spring 120 to a second position corresponding to the winding release position, Its tip bent part 1
21c causes the filmback side winding signal transmission member 201 to move to the left against the spring 203 through the transmission pin 204, so that the winding release lever 218 is rotated to the left by being pushed by the bent portion 201b, and one end thereof The pin 216 is pressed downward, and the indexing lever 207 rotates to the right against the spring 206, and one end of the indexing lever 207 rotates to the right.
7a is removed from the recess 208b of the counter indexing plate 208.

As a result, the counter indexing plate 208 is caused by the spring 21
1, the indexing lever 207 is rotated clockwise by approximately half the pitch of the tooth 208a, and at the same time, the bent portion 207b of the indexing lever 207 presses the protrusion 212b upward, causing the film stopper lever 212 to rotate clockwise, and the tip claw Part 21
2a is removed from the winding pawl wheel 215, and the film is released from winding.

Then, at the end of the rotation of the signal drive member 108, the engagement between the drive claw 117 and the bent portion 121a is disengaged, so that the hoisting signal transmission member 121 becomes free and rotates clockwise by the neutral spring 120. , 1st
Attempt to return to position.

When the hoisting signal transmitting member 201 becomes free, the hoisting signal transmitting member 201 moves to the right toward the camera body by the spring 203, and the transmitting pin 204 connects to the bent portion 121.
c to the right, the winding signal transmitting member 121 on the camera body side rotates to the right against the neutral spring 120, and the position where the protrusion 201c of the winding signal transmitting member 201 abuts the indexing lever 207 is reached. At this point, the rightward movement of the hoisting signal transmitting member 201 is stopped, and the rotation of the hoisting signal transmitting member 121 on the camera body side is also stopped.

Also, by moving the winding signal transmission member 201 on the film back 2 side to the right, the indexing lever 207 is moved by the spring 2.
06, and one end of the bent portion 207a engages the teeth 2 of the counter indexing plate 208 as shown in FIG.
When it comes into contact with the top surface of 08a, its rotation stops and is maintained at the third position shown in FIG. 3, resulting in an unfinished hoisting state.

At this time, the film stop lever 212 rotates slightly to the left from the state shown in FIG. 2, and its pawl 212a approaches the gear of the stop pawl wheel 215, but the two do not engage and the film is still in a state where it can be wound. is maintained.

When the winding member (not shown) on the camera body side is wound clockwise from the unfinished state shown in FIG. 3,
The winding stop plate 101 that is integral with the winding stop plate 102 moves together with the winding stop plate 102, and the signal drive member 108 rotates counterclockwise through the winding gear train on the camera body side that is linked to the rotation of the winding stop plate 101. However, the stepped portion 108a is locked by the locking lever 112, and the spring 107 is held in the energized state, and at the same time, the rotating member 114 also rotates clockwise.

In conjunction with this winding wheel train on the camera body 1 side, the winding wheel train on the film back 2 side is also wound up, and when the film has been wound up a predetermined amount, the counter indexing plate 208 is moved clockwise via a known friction wheel. Rotate to
The bent portion 2 of the index lever 207 is inserted into the recessed portion 208b.
07a is engaged, the film winding lever 212 stops the rotation of the winding pawl wheel 215, and winding of the film back side is completed.

Thereafter, a clutch mechanism (not shown) stops the rotation of the film winding gear train, and only the camera body side is wound.
1 is stopped by the winding lever 103, the entire winding is completed, and after the winding is completed, the signal drive member 108 and the rotating member 114 are disengaged from the gears and kept in a reversible state. ing.

Next, FIG. 4 shows a state in which a fully wound film bag 2 is attached to a camera body 1 which has not yet been fully wound. The side is in almost the same state as in FIG. 3, but the transmission pin 204 of the winding signal transmitting member 201 on the film back side is not pressing the winding signal transmitting member 121 on the camera body side.
This hoisting signal transmission member 121 is in a first position, which is a neutral state similar to that shown in FIG. 1, due to the action of the neutral spring 120.

When the winding operation is performed in this state, the camera body side is wound up while the winding signal transmission member 121 on the camera body side remains in the first position, and the winding operation is completed as shown in Fig. 1. Complete. At this time, since the film back side is disconnected by the clutch mechanism, it remains in the previous state.

FIG. 5 shows a state in which a film bag 2 whose winding is not yet completed is attached to a camera body 1 whose winding has been completed, and a winding signal transmission member 201 on the film back side.
is located at the right end due to the spring 203, so the winding signal transmission member 121 on the camera body side is connected to the neutral spring 12.
The bending portion 121b presses the protrusion 103c to the right and rotates the winding lever 103 to the left against the spring 105 to release the winding. Up operation becomes possible.

When winding is performed from this state, the winding wheel train on the camera body side rotates idly, and only the film back side is wound up, resulting in a completed winding state similar to that shown in FIG.

Also, when both the camera body side and the film back side have completed winding, the situation will be similar to that shown in Figure 1, so you can immediately take pictures. Since this is the same, it is possible to wind the camera body side and the film back side.

Furthermore, when the film back 2 is removed from the camera body 1 and only the camera body is left alone, the winding completion state on the film back side is the same as the winding completion state shown in FIG. 1, as shown in FIG. , the winding signal transmission member 121 is in the first position, and the release operation can be performed as it is. When the winding is not completed, as shown in Fig. 7, the state is similar to the unfinished winding state shown in Fig. 4, and the state is ready for winding. becomes possible. That is, it becomes possible to perform winding and release operations using the camera body alone.

In any of the above cases, the winding signal transmitting member 121 on the camera body side, which drives the winding signal transmitting member 201 on the film back side in the unwinding direction against the biasing force, is energized at the time of winding. Since the shutter is driven by the signal drive member 108 actuated by the spring 107, there is no adverse effect on the shutter operation.

〔Effect of the invention〕

As described above, according to the present invention, the winding signal transmission member on the camera body side corresponds to the winding completion position, the winding release position, and the winding incomplete position of the filmback side winding signal transmission member, respectively. the second position is on the film back side and the second position is located on the film back side, and the second position is located on the film back side and
so that the positions of are opposite to each other, and
When the film back is not attached, the winding signal transmitting member on the camera body side is in the first position, so the winding signal transmitting member at only one location connects the camera body side and the film back side. , the completion or incomplete winding on the film back side can be transmitted to the camera body side, and when the film back is removed, normal operations such as winding, winding stop and release can be performed only on the camera body side.
This allows you to check and test the operation of the camera body.

Further, even when a film bag that does not require film winding and does not have a winding signal transmission member is attached to the camera body, it has the excellent effect of being able to take pictures by winding only the camera body.

Furthermore, according to the second invention, in addition to the above configuration, the winding signal transmission member on the camera body side is driven by the signal driving member that stores energy by winding up, regardless of shutter operation. It is possible to completely eliminate the adverse effect that unwinding on the film back side has on the shutter operation.

[Brief explanation of the drawing]

FIG. 1 is a mechanical diagram showing a completed winding state in an embodiment of the present invention, FIG. 2 is a mechanical diagram showing a state in which the winding is released, and FIG. 3 is a mechanical diagram showing an unfinished state of winding. Mechanism diagram, Figure 4 is a mechanism diagram showing a state in which a fully wound film bag is attached to a camera body which has also not been fully wound. Fig. 6 is a mechanical diagram showing the state in which the completed film bag is attached.
Similarly, FIG. 7 is a mechanical diagram showing only the camera body in a fully wound state with the film back removed, and FIG. 7 is a mechanical diagram showing only the camera body in a state in which winding is not yet completed. 1...Camera body, 2...Filmback, 1
01... Winding stop plate, 103... Winding stopping lever, 108
... Signal drive member, 112 ... Locking lever, 11
4... Rotating member, 117... Drive claw, 120...
Neutral spring, 121... Winding signal transmission member (camera body side), 201... Winding signal transmission member (filmback side), 204... Transmission pin, 207...
Indexing lever, 208...Counter indexing plate, 212
... Film stopper lever, 215 ... Stopper pawl wheel,
218... Winding release lever.

Claims (1)

[Claims] 1. The winding signal transmitting member 121 on the camera body 1 side and the winding signal transmitting member 201 on the film bag 2 side are interlocked at one location, and the winding stopping member 103 on the camera body side is In a camera winding signal transmission device in which the winding member is in a lockable state when the winding is completed and the winding member is not lockable at the time of release, the winding signal transmitting member 121 on the camera body side is provided. The first position () corresponds to the winding completion position of the winding signal transmission member 201 on the filmback side, the second position () corresponds to the winding release position, and the winding incomplete position. and a third position (), the second position () being on the film back side, and the second position () and the third position () being opposite to each other with respect to the first position (). At the same time, when the film back 2 is not attached, the winding signal transmission member 121 is located on the camera body 1 side.
A hoisting signal transmission device characterized in that: is in a first position (). 2 The winding signal transmitting member 121 on the camera body 1 side and the winding signal transmitting member 201 on the film back 2 side are interlocked at one location, and the winding stopper member 103 on the camera body side stops the winding member when winding is completed. In a camera winding signal transmission device in which the winding member is in a lockable state and the winding member is in a lockable state at the time of release, the winding signal transmitting member 121 on the camera body side is connected to the film back side. The first position () of the hoisting signal transmission member 201 corresponds to the winding completed position, the second position () corresponding to the winding release position, and the third position () corresponding to the winding incomplete position. ), and the second position () is on the film back side and the second position () and the third position () are opposite to each other with respect to the first position (). At the same time, when the film back 2 is not installed, the winding signal transmission member 121 on the camera body 1 side
A hoisting signal transmitting device characterized in that the hoisting signal transmitting member 121 is driven by a signal driving member that stores energy during hoisting.