JPS6270823A - Film holder including winding motor - Google Patents

Abstract

PURPOSE:To extremely simplify the structure of a film holder by arranging a winding motor on a space part between both spools of the film holder feeding side and the winding side to connect the camera body side with the film holder side electrically. CONSTITUTION:In the inside of the film holder, the winding motor 16 is arranged on the space part between the feeding side spool 14 and the winding side spool 15 and the winding motor 16 is driven by a power supply arranged on the camera body side through a front contact plate 17 of the film holder 1. Consequently, the space part which is not utilized as a dead space can be effectively used and the electric winding mechanism can be built in without increasing the size of the film holder, so that the coupling part between the film holder and the camera body can be extremely simplified.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a film holder with a built-in winding motor.
In particular, it relates to a film holder with a built-in winding motor that feeds the film with the sensitive side facing outward.

[Conventional technology]

Film holders that are detachable from the camera body and adopt the so-called Ω-type winding system in which the film is fed with the sensitive side on the outside are different from ordinary film holders in which the film is fed with the sensitive side on the inside. Since the width of the film holder can be made smaller than that using this method, it is widely used in middle-split cameras that use 120 and 220 film.

Conventionally, in such a film holder, a winding mechanism on the film holder side is mechanically coupled to a manual or electric winding mechanism on the camera body side via a winding coupling means, and a winding signal on the film holder side is connected to the winding mechanism on the film holder side. Also, signals such as shutter operation completion signals from the camera body and the like were mechanically transmitted to the other party.

[Problem that the invention attempts to solve]

However, such conventional film holders require multiple mechanical connections between the camera body and the film holder, making the mechanism complicated and
Both had the disadvantage of increasing mechanical constraints and making design difficult.

In particular, if the film holder is
When mounted on a camera body that has a revolving device that switches between vertical and horizontal screens by rotating the camera body, the above-mentioned mechanical connecting parts are located on both sides of the camera body or film holder side rotated by 90 degrees. The problem was that the mechanism became extremely complicated and the design became extremely complicated.

An object of the present invention is to provide a film holder with a built-in winding motor that can solve these conventional problems.

[Means for solving problems]

Therefore, in the film holder with a built-in winding motor according to the present invention, the winding motor is installed in the space between the spools on the supply side and the winding side of the film holder, which feeds the film with the sensitive side facing outward. This is what I did.

[For production]

By configuring as described above, the structure can be significantly simplified by using an electrical connection instead of a mechanical connection between the camera body side and the film holder side.

Additionally, since the winding motor is installed in the space formed between the supply spool and the take-up spool, the winding motor can be stored without increasing the size of the film holder. , there is no risk of impairing the portability and operability of the camera.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a film holder that is detachable from a camera body having a revolving device will be described below with reference to FIGS. 1 to S of the accompanying drawings.

First, a film holder to which the present invention is applied and a camera body to which the film holder is mounted will be briefly explained with reference to FIGS. 1 to 5.

FIG. 2 shows the attachment surface of the film holder 1 to the camera body 2, and the film holder 1 can be attached to the revolving portion 21 of the camera body 2 shown in FIG. 3 using the holder attachment knob 11.

A film sensitivity setting dial 12 is provided on the film holder 1 side, and the signal is sent to the contact plates 13a, 13b and the corresponding camera body 2 to the contact plates i3a, 13b.
It is connected to the automatic exposure setting circuit on the camera body side via the contact plate 22 on the side.

Further, inside the film holder 1, as shown in FIG.
Reference numeral 6 indicates a contact plate 17 on the front surface of the film holder 1 and contact plates 23a and 2 on the camera body 2 side corresponding to this contact plate 17.
3b, it is operated by the power supply on the camera body side.

Figures 4 and 5 show the above film holder 1 being attached to the camera body 2.
The film holder 1 is shown mounted on a camera and rotated 90 degrees to switch between a horizontal screen (FIG. 4) and a vertical screen (FIG. 5).

Next, an example of a specific structure of the film holder 1 will be explained with reference to FIGS. 6 to S.

The rotation of the winding motor 16 is transmitted to the film winding shaft 102 via the winding shaft row 101, and the film F is wound by rotating the film winding shaft 102 counterclockwise. The friction roller 103 is brought into rolling contact,
The rotation of the friction roller 103 is transmitted to the well-known indexing plate 105 and film counter plate 10, which have a return behavior, via the deceleration shaft array 104.

Here, the shaft 107a of the intermediate gear 107 of the reduction shaft train 104
A bell crank 10 is pivotally attached to the bell crank 108 and biased in the counterclockwise direction by a spring 109, and a gear 107 is attached to one end of the bell crank 108.
The planetary gear 11Qa that meshes with the planetary gear 11Qa and the gear 1 that is integral with the planetary gear 11Qa.
10b is provided so that the gear 110 can be engaged with and disengaged from a gear 111 that is integral with the friction roller 103.

Also, the film stopper lever 1 is connected to the shaft 112 of the film holder 1.
One end of the index plate 13 is pivotally attached, biased in the counterclockwise direction by a spring 114, and a bent portion 113a is provided at its free end, and the side surface of the bent portion 113a is engaged with and disengaged from the outer peripheral portion of the index plate 105. In addition, when the creation plate 105 returns, the stop position of the indexing plate 105 is regulated by abutting against the protrusion 105a.

The shaft 11 on the branched arm 113b of this wind stop lever 113
A locking lever 116 is pivotally attached to the arm 113b, and a spring 117 is engaged between it and the arm 113b to bias it in the left rotation direction.
When a engages with the side surface of the arm 113b, the two become one and stop at one turn/<-113 rotates to the left,
A claw portion 116b of the locking lever 116 engages with a gear 118 of the winding train 101 to lock the rotation of the winding shaft 102.

Further, a release lever 120 is pivotally mounted on a shaft 119 and biased in the left rotation direction by a strong spring 121, and one end of the release lever 120 is attached to the arm 11.
3b, and the other end can be engaged with and detached from the back M122.

The protrusion 120a can be engaged with and detached from a pin 122 provided at one end of the bell crank 108.

Further, a solenoid plunger 123 is provided substantially perpendicularly to the wind stop lever 11'5, and the tip of the actuator 123a is opposed to the bent part 113d of the wind stop lever 113,
When energized, the actuator 123a protrudes and the stop lever 113 rotates to the right against the spring 114, and a lead wire for supplying current to the solenoid plunger 123 is connected to the contact plate 1 provided on the front surface of the film holder 2.
Connect to the two contacts 17a and 17b of 7.

A power supply circuit for the hoisting motor 16 is connected to the other two contacts 17e and 17d of this contact plate 17, and a normally open first contact is connected in series to this power supply circuit. A second switch 124° 125 and a normally closed third switch 126 are inserted.

Then, the pin 127 of the release lever 120 is made to face the first switch 124, so that the first switch 124 is turned on by turning the release lever 120 to the right when the 7A cover 122 is closed, and the second switch 125 is made to face the winding stop lever. With the pin 128 of 113 facing, the second switch 1 is turned to the right by turning the stop lever 113 to the right due to the operation of the solenoid plunger
25 is turned on, and further, the third switch 12 is turned on.
6 is placed within the rotation range of the protrusion 105a of the index plate 105, and the third switch 126 is turned off by engaging with the protrusion 105a when winding of the film is completed.

Next, the operation of the embodiment configured as described above will be explained.

When a film is loaded into the film holder 1, manually wound up to the start mark, and the back cover 122 is closed, the release lever 120 rotates to the right against the force of the spring 121, resulting in the state shown in FIG.

In this state, the first. Second. 3rd switch 124°125
．． 126 are all turned on, the winding motor 16 is energized and started from the power supply on the camera body 2 side, and the winding shaft 10
2 counterclockwise to wind up the film F.

When the film F is wound, the friction wheel 103 rotates clockwise, the index plate 105 rotates counterclockwise and the film counter plate 106 rotates clockwise via the deceleration shaft array 104, and the first sheet When it reaches the eye, the bending part 1 of the wind stop lever 113
13a falls into the first groove 105b of the index plate 105, the stop lever 113 is rotated to the left by the spring 114, and the arm 1
The pawl portion 116b of the locking lever 116 pivotally connected to the locking lever 116 engages with the teeth of the gear 118, resulting in the state shown in FIG. 7, and the rotation of the winding shaft is stopped.

At the same time, the pin 128 of the wind stop lever 113 separates from the second switch 125, which turns off the winding motor 16△ and stops the winding of the film F up to the first sheet. is completed, the signal is transmitted to the camera body 2, and the shutter release operation becomes possible.

Next, the shutter is activated by the release operation of the camera body 2 to take a picture, but when the shutter operation is completed,
The solenoid plunger 123 is instantaneously energized, the actuator 123a protrudes, and the winding lever 113 is moved by the spring 11.
Rotate to the right against 4.

As a result, the groove of the indexing plate 105 is closed by the well-known auxiliary indexing plate and the bending portion 113a is prevented from falling down again, so even if the operation of the solenoid plunger 123 is completed, the winding lever 113 continues to rotate to the right, resulting in the state shown in FIG. 8, the pin 128 turns on the second switch 125, and the winding motor 16 rotates to wind the film F.

When one sheet of film F has been wound, the bent portion 113a of the wind stop lever 113 falls into the second groove of the indexing plate 105 again, stopping the winding and allowing the shirt release operation of the camera body 2. becomes.

In this way, when a predetermined number of images have been photographed, the state shown in FIG.
6 continues to be energized, the leader paper in the latter half of the film is wound up to the final stage, and at the final stage, the protrusion 10 of the indexing plate 105
5a turns off the third switch 126, power supply to the winding motor 16 is stopped and winding of the film is completed.

Finally, when the back cover 122 is opened to take out the photographed film, the released release lever 120 is rotated to the left by the strong spring 121, and the pin 127 is moved to the first switch 124.
At the same time, one end of the release lever 120 drives the bent portion 113C of the wind stop lever 113 to rotate the wind stop lever 113 to the right against the spring 114. The bent portion 113a is separated from the outer peripheral portion of the index plate 105.

At the same time, the protrusion 120a of the release lever 120 drives the pin 122 to rotate the bellcrank 108 to the right against the spring 10S, and the gear 110b is separated from the gear 111. Therefore, the index plate 105 is moved by its own return force to the protrusion. The film counter plate 106 rotates clockwise until it abuts the bending portion 113a, and in conjunction with this, the film counter plate 106 returns counterclockwise, and the third switch 126 is turned on.

Note that when the back cover 122 is closed without loading a film into the film holder 1, the first. 2nd゜3rd switch 1
24, 125, and 126 are all turned on, but it is preferable that the energization to the winding motor 16 is stopped by a film presence/absence detection switch (not shown).

In addition, in the above embodiments, the case where the film holder can be attached and detached from the camera body has been explained, but in the case where only the film winding section of the film holder can be attached and detached, this embodiment of the film winding section will be described. A hoisting motor may be provided at a position corresponding to the example.

Furthermore, in the above embodiment, only the winding motor is built into the film holder side, and its power source is provided in the camera body. If there is enough space, you can use it without increasing the size of the film holder.
It becomes possible to incorporate the power supply unit together with the winding motor, and the burden placed on the power supply on the camera body side can be reduced.

Furthermore, it goes without saying that the present invention is applicable not only to the above camera body but also to film holders of any type of camera.

〔Effect of the invention〕

As mentioned above, the film holder with a built-in winding motor according to the present invention is a film holder that feeds film with the sensitive side facing outward, and the film is wound in the space between the two spools on the supply side and the take-up side. Since the upper motor is provided, the space that was previously not used as dead space can be used effectively, and an electric winding mechanism can be incorporated without increasing the size of the film holder. This makes it possible to significantly simplify the connection between the film holder and the camera body.

[Brief explanation of drawings]

FIG. 1 is a rear perspective view showing one embodiment of the present invention, and FIG. 2 is a front perspective view of the same. FIG. 3 is a rear perspective view showing an example of a camera body to which a film holder according to the present invention is attached, and FIG. 4 is a rear perspective view showing a film holder attached to the camera body. FIG. 5 is a rear perspective view showing the film holder rotated 90 degrees, and FIG. 6 is an exploded perspective view showing an example of the internal configuration of the present invention. Items 7 to S are also plan views for explaining the operation. 1... Film holder 2... Camera body 14
...Supply side spool 15...Take-up side spool 1
6... Hoisting motor 17... Contact plate 102.
...Film winding shaft 103...Friction roller 105
... Index plate 106 ... Film counter board 11
3... Winding stop lever 120... Fl lever 1
22... Back cover 123... Solenoid plunger 124... First switch 125... Second switch 126 - Third switch F... Film No. 5
figure

Claims (1)

[Claims] 1. A film holder with a built-in winding motor, characterized in that in a film holder that feeds the film with the sensitive side facing outward, the film winding motor is provided in the space between the supply side spool and the take-up side spool. holder.