JPH06160951A - Film winding and rewinding switching mechanism for photographing device - Google Patents

Abstract

PURPOSE:To interlock the on/off of clutches on a winding side and a rewinding side with simple constitution by slight operating force by interlocking 1st and 2nd clutches by means of an interlocking member moving in the operating direction of the respective clutches. CONSTITUTION:A rod guiding space 48 is formed between the upper wall parts of a wall 43, and an interlocking rod (interlocking member) 49 whose both ends 49a and 49b are projected in gear chambers 5b and 6b is disposed in the space 48. Hook parts 49d for engagement are formed at both end parts 49a and 49b of the rod 49. The hook parts 49d are provided so that they can engage with a winding lever and a clutch lever from opposite sides to each other. The interlocking rod 49 is moved in nearly the same direction on the same plane as the clutch lever, and both clutches are interlocked so that either the clutch may be turned off when the other is turned on.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film winding / rewinding switching mechanism of a photographing device in which a film winding shaft and a film rewinding shaft are electrically driven.

[0002]

2. Description of the Related Art As a film winding / rewinding switching mechanism of this kind, a film box includes a second motor for film winding, a film winding shaft and a sprocket shaft for detecting the film winding amount, which are arranged in parallel with each other. A second motor is interlocked with at least one of both shafts via a second clutch that is mounted on one side of the shaft and is intermittently operated by operating in a direction perpendicular to both shafts. A first motor for rewinding is provided on the other side of the film box, and the first motor is interlocked with the film rewinding shaft via a second clutch that is intermittently operated by operating in the same direction as the first clutch, Both clutches are interlocked by the interlocking member so that when one of both clutches is ON, the other is OFF, and the first and second motors that operate according to ON / OFF of each clutch are ON / OFF.
Something that can be done is considered.

[0003]

It is desirable that the ON / OFF of the two clutches on the winding side and the rewinding side can be interlocked with a simple structure with a light operating force.

Therefore, according to the present invention, the film winding / rewinding switching mechanism of a photographing device capable of interlocking ON / OFF of the two clutches on the winding side and the rewinding side with a simple structure and with a light operating force. The purpose is to provide.

[0005]

To achieve this object, the present invention is directed to a film rewinding shaft and a first motor for film rewinding provided on one side of the film box and perpendicular to the film rewinding shaft. A first motor is interlocked with a film rewinding shaft through a first clutch that is intermittently operated by a moving operation in another plane, and a second motor for film winding and a film winding arranged in parallel with each other. A shaft and a sprocket shaft for detecting the film winding amount are mounted on the other side of the film box, and a second motor is connected to the film winding shaft via a second clutch that is intermittently operated by operating in the same direction as the first clutch. The sprocket shaft is interlocked with at least one, and both clutches are interlocked by the interlocking member so that when one of both clutches is ON, the other is OFF, and it operates according to ON / OFF of each clutch. ON / OFF of the first and second motors
In the film winding / rewinding switching mechanism of the photographing device, the first and second clutches are interlocked by the interlocking member that moves in the operation direction of each clutch. It is characterized by using a switching mechanism.

[0006]

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

[First Embodiment] FIGS. 1 to 7 show a first embodiment of the present invention.

In FIG. 1 and FIG. 2, reference numeral 1 is a camera body of a 35 mm camera as a photographing device which is mounted on a fundus camera for use. The camera body 1 includes an optical component box 2 in which optical components are incorporated and an optical component box 2
It is composed of a film box 3 which is detachably attached to the film box 3. An eyepiece 2 having a quick return mirror 2a, a field lens and prism (not shown), and an eyepiece (not shown) built in the optical component box 2.
b, etc. Reference numeral 2c in the drawing denotes a photographing window provided in the optical component box 2, and this photographing window 2c corresponds to a photographing window of a shutter storing section described later when the optical component box 2 and the film box 3 are attached to each other. To be made.

The film box 3 has a box body 4 having a U-shaped planar shape, and a back cover 4a (see FIGS. 5 and 7) for opening and closing a rear opening of the box body 4. 4b is a film retainer integrated with the back cover 4a. The box body 4 is
A first drive component storage portion 5 provided on one side for the film rewinding mechanism, a second drive component storage portion 6 provided on the other side for the film winding mechanism, and a drive component storage portion. It has a bottom wall portion 7 in which 5 and 6 are integrally connected, and a shutter storage portion 8 in which the rear parts of the drive component storage portions 5 and 6 are connected in series.

The film box 3 is attached to the optical component box 2 by fitting and engaging the optical component box 2 and the recess 4c of the box body 4 with each other. At this time, the optical component box 2 and the box body 4 are held so that they can be engaged with and disengaged from each other by a well-known engagement / disengagement mechanism using a locking claw or the like that is movable and not shown.

[Film Rewinding Mechanism (First Drive Component Housing 5)] As shown in FIG. 4, the first drive component housing 5 includes a gear chamber 5b divided into upper and lower parts by a partition wall 5a and a film loader. In addition to having the chamber 5c, as shown in FIG. 7, it has a first motor chamber 5d located at the rear of the film loading chamber 5c and connected to the gear chamber 5b.

In the gear accommodating chamber 5b, there are a mounting plate 9 fixed on the partition wall 5a and a mounting plate 10 arranged on the mounting plate 9 at a distance and fixed to the side wall surface of the gear chamber 5b. It is arranged.

A first motor 11 arranged in a motor chamber 5d is mounted on the mounting plate 9, and a shaft support portion 11a at the upper end of the first motor 11 is mounted between the mounting plates 9 and 10.
And the output shaft 11b of the first motor 11 penetrating the shaft support portion 11a is projected, and the drive gear 12 is attached to the output shaft 11b.
Is fixed.

Further, the partition wall 5a is disposed above the film loading chamber 5, and the base portion 13a penetrates the partition wall 5a and the mounting plate 9 and projects between the mounting plates 9 and 10. Is rotatably held.
The film rewinding shaft 13 is provided so as to be movable in the axial direction within a predetermined range, but this structure is omitted for convenience of illustration. Further, the first motor 11 and the film rewinding shaft 13 are disengageably provided via a first clutch 14 as shown in FIG.

The first clutch 14 has a clutch lever 15 held by the shaft support 11a so as to rotate in a plane perpendicular to the film rewinding shaft 13, and a clutch lever 15
A support shaft 16 protruding from the free end of the film, a clutch gear 17 rotatably held by the support shaft 16 and engaged with the drive gear 12, and a winding unit fixed to the base 13a of the film rewinding shaft 13. The clutch lever 17 is interposed between the return gear 18 and the spring locking pin 9a clutch lever 15 protruding from the mounting plate 9, and biases the clutch lever 15 in the direction in which the clutch gear 17 meshes with the rewind gear 18. It has a spring 19 that opens.

The support shaft 16 is mounted on the mounting plate 1 as shown in FIG.
It projects above the mounting plate 10 through the circular arc hole 10a provided in 0. A switching lever 20 for clutch operation is mounted on the mounting plate 10 via a support shaft 21 so as to be horizontally rotatable.

The switching lever 20 has a disk-shaped cam plate 20a which is concentric with the support shaft 16 and a lever portion 20b which is connected to the cam plate 20a. The lever portion 20b is projected to the outside from a slit 22a formed between the upper lid 22 that closes the gear chamber 5b and the side wall of the gear chamber 5b as shown in FIGS.

As shown in FIG. 6, the cam plate 20a has an inclined cam surface 20c, a small-diameter circular arc-shaped cam surface 20d and a large-diameter circular arc-shaped cam surface 20e which are connected to each other by the inclined cam surface 20c.

The clutch gear 17 is composed of the support shaft 16
Is positioned on the side of the arcuate cam surface 20d, the spring force of the spring 19 engages with the rewinding gear 18 (the first clutch 14 is turned on), and the support shaft 16 moves the arcuate cam surface 20e.
When it is engaged with, the rewinding gear 18 is disengaged (the first clutch 14 is turned off).

A pin 23 for operating a switch is projected on the cam plate 20a, and the pin 2 is mounted on the mounting plate 10.
A film rewinding microswitch 24 and a film rewinding microswitch 25, which are operated by 3, are attached. The support shaft 16 has an arcuate cam surface 20.
When it is located on the side of d, the micro switch 24 for rewinding the film is turned on by the pin 23, and
When the support shaft 16 is engaged with the arcuate cam surface 20e, the micro switch 25 for film winding is pinned by the pin 23.
It can be turned on. When the micro switch 24 is turned on, the first motor 11 is operated, and when the micro switch 25 is turned on, a second motor 26, which will be described later, is made operable.

[Film Winding Mechanism (Second Drive Component Storage Section)] The second drive component storage section 6 has a partition wall 6a as shown in FIG.
Gear chamber 6b and film winding chamber 6c that are vertically divided by
And a motor chamber (not shown) that is located at the rear of the film winding chamber 6c and is connected to the gear chamber 6b. In the figure, 6d is a bottom wall of the film winding chamber 6c, 27 is an upper lid that closes the upper portion of the gear chamber 6b, and 28 is a mounting plate fixed to the partition wall 6a. The mounting plate 28 includes a second motor 26 (see FIG. 3) disposed in the second motor chamber.
(See) is fixed. 26a is an output shaft of the second motor 26.

A film winding chamber 6c is provided on the walls 6a and 6d.
A sprocket 30 and a spool shaft 31 arranged side by side inside are rotatably held, and a cylindrical spool 32 is rotatably fitted to the spool shaft 31. Moreover, a spring 33 for frictionally engaging the spool shaft 31 and the spool 32 is arranged between the spool shaft 31 and the spool 32.

A mounting plate 28 fixed to the partition wall 6a is disposed in the gear chamber 6b, and a support shaft 34 and a spool shaft 31 integrally provided with the sprocket 30 are provided.
The upper end of the is protruding.

A spool gear 35 is fixed to the upper end of the spool shaft 31, and a drive gear 36 is fixed to the output shaft 26a of the second motor 26. As shown in FIG. 3, the mounting plate 28 rotatably holds an idle gear 37 that meshes with the spool gear 35, and also rotatably holds an idle gear 38 that meshes with the drive gear 36 and the idle gear 37. There is. This idle gear 3
A second clutch 39 is interposed between the gear 8 and the sprocket 30.

The second clutch 39 includes a clutch lever 39a, which is held coaxially with the idle gear 37 so as to be operable in the same direction as the clutch lever 15, and a clutch lever 39.
The idle gear 37 is rotatably held in the middle part of a.
The clutch gear 40 that meshes with the sprocket gear 41, the sprocket gear 41 fixed to the support shaft 34, the spring locking pin 28a projecting from the mounting plate 28, and the clutch lever 39a are interposed between the sprocket gear 40 and the sprocket. Gear 41
The spring 42 is biased in the direction in which the second clutch 39 is turned on (the direction in which the second clutch 39 is turned on).

[Shutter Storage Section 8] Shutter Storage Section 8
Has a front wall 43 and a rear wall 44, as shown in FIG.
Photographing windows 43a, 4 corresponding to each other are provided on the walls 43, 44.
4a is formed, a shutter storage space 45 is formed between the walls 43 and 44, and a shutter storage space 4 is formed on the rear wall 44.
A focal plane shutter 46 (details not shown) disposed inside the camera 5 is attached so as to open and close the photographing window 44a. Reference numeral 46a is a shutter holding plate, and 46b is a photographing window of the shutter holding plate 46a. Moreover, a film guide groove 47 that connects the film loading chamber 5c and the film winding chamber 6c is provided in the rear wall 44.
4, a rod guide space 48 is formed between the upper wall portions 43b and 44b of the upper wall portion 4, and both end portions 49a,
An interlocking rod (interlocking member) 49, of which 49b projects into the gear chambers 5b and 6b, is provided. The hooks 49c, 4 for engagement are provided on both ends 49a, 49b of the interlocking rod 49.
9d is formed.

The hook portions 49c and 49d are provided so as to be engaged with the hoisting lever 20 and the clutch lever 39a from opposite sides. Moreover, this interlocking rod 49
Moves in the same direction as the clutch levers 20 and 39a in the same plane so that both clutches 14 and 39 are interlocked so that when one is on, the other is off. There is.

Next, the operation of the film winding / rewinding switching mechanism of the photographing apparatus having such a structure will be described.

In such a structure, as in a normal 35 mm camera, a 35 mm film cartridge (not shown) is loaded in the film winding chamber 5c, and the film rewinding shaft 13 is attached to the film shaft of this cartridge. It is engaged so that it cannot rotate relative to it. The film on the film shaft is guided to the film winding chamber 6c through the film guide groove 47, the sprocket holes of the film are engaged with the sprocket teeth 30a of the sprocket 30, and the leading end of the film is locked by the spool 32. It is held by a unit (not shown).

[Film Winding] When the film is wound, the switching lever 20 is positioned on the opposite side of the slit 22a shown in FIG. 3 from the position indicated by the broken line, and the support shaft 16 is moved to the cam plate 20a. It is located on the arcuate cam surface 20e.

At this position, when the support shaft 16 is engaged with the arcuate cam surface 20e, it is separated from the rewinding gear 18 (first
The clutch 14 is turned off to disconnect the first motor 11 from the film rewinding shaft 13, and the film rewinding microswitch 24 is turned off to prevent the first motor 11 from operating. It has become.

Further, at this position, the clutch gear 40 of the second clutch 39 is engaged with the sprocket gear 41 by the spring force of the spring 42 (the second clutch 39 is turned on), and the micro-switch for film winding is performed. 25
Is turned on by the pin 23, and the second motor 26 is in an operable state.

When a photographing switch (not shown) is turned on in such a state, the focal plane shutter 46 is opened and closed to perform photographing, and then the second motor 26 is operated in a film winding direction. At this time, the rotation of the second motor 26 is transmitted to the sprocket 30 via the gears 36, 38, 40, 34, and the rotation of the gear 3
6, 38, 37, 35, spool shaft 31, spring 3
3 is transmitted to the spool 32.

As a result, the sprocket 30 and the spool 32 are rotated in the film winding direction, the film is wound around the spool 32, and the spool 3 is moved by the feed amount of the sprocket 30 and the film winding diameter.
When there is a difference in the winding amount of 2, the spool 32 slips against the spool shaft 31 against the spring force of the spring 33, and the difference in the winding amount is absorbed. And
The rotation of the sprocket 30 is detected from the rotation amount of the second motor 26, and when the rotation amount reaches the amount obtained by moving the film by one frame, the operation of the second motor 26 is stopped,
Be prepared for the next shoot.

[During Film Winding] When the film is rewound after such photographing is finished, the switching lever 20 is rotated in the clockwise direction in FIG. It moves to the position of the broken line of 3.

With this moving operation, the interlocking rod 49 rotates the clutch lever 39a to the position shown in FIG. 3 against the spring force of the spring 42 to release the meshing between the clutch gear 40 and the sprocket gear 41. , Cam plate 20a
Is rotated clockwise, the clutch lever 15 is rotated clockwise by the spring force of the spring 19, and the support shaft 16 is positioned on the arcuate cam surface 20d of the cam plate 20a. The gear 17 is meshed with the rewinding gear 18.

At this position, the micro switch 24 is turned on by the pin 23 to activate the first motor 11, and the micro switch 25 is turned off to render the second motor 26 inoperable. And
The rotation of the first motor 11 is transmitted to the film rewinding shaft 13 via the gears 12, 17, and 18, and the film on the spool 32 is wound around the film shaft in the film rewinding chamber 5c.

[Second Embodiment] FIG. 8 shows a second embodiment of the present invention.

In this embodiment, the idle gear 3 of the first embodiment is used.
An example is shown in which 7 is attached to the clutch lever 39a as a clutch gear so that the idle gear 37 and the spool gear 35 are connected / disconnected when the sprocket 41 and the clutch gear 40 are connected / disconnected as the clutch lever 39a is rotated. It is a thing.

[Third Embodiment] FIGS. 9 and 10 show a third embodiment of the present invention. The present embodiment shows an example in which the second clutch 39 of the first embodiment is replaced with a second clutch 50 having another structure.

In this embodiment, the clutch lever 51 is rotatably attached to the upper end of the spool shaft 31, and the clutch gear 52 meshing with the spool gear 35 is rotatably held and attached to the free end of the clutch lever 51. The spring locking pin 53 protruding from the plate 28 and the clutch lever 5
A spring 54 is interposed between the first and second springs. This spring 54 connects the clutch lever 51 to the clutch gear 52.
Is urged to rotate in the direction in which it is meshed with the drive gear 36. The hook portion 49d of the interlocking rod 49 is engaged with the clutch lever 51 as in the first embodiment.

A rotation amount detecting means 55 for detecting the rotation amount of the sprocket 30 is provided between the support shaft 34 of the sprocket 30 and the side wall of the gear chamber 6b. The rotation amount detecting means 55 has a notch 56a extending in the radial direction.
And a photo-interrupter 57 for detecting a slit of the rotary plate 56, and a rotary plate 56 fixed to the support shaft 34 of the sprocket 30.

In the present embodiment, when the film is wound, as shown in FIG.
As described above, the clutch gear 52 is engaged with the drive gear 36. On the other hand, when the film is rewound, the clutch lever 51 is rotated in the clockwise direction via the interlocking rod 49, and the engagement between the clutch gear 52 and the drive gear 36 is released. The other operations are the same as those in the first embodiment, and thus the description thereof will be omitted.

[0044]

[Effects] Since the present invention is configured as described above, ON / OFF of the two clutches on the winding side and the rewinding side can be interlocked with a simple structure with a light operating force.

[Brief description of drawings]

FIG. 1 is a schematic configuration explanatory view partially disassembled and showing a camera including a film winding / rewinding switching mechanism of a photographing apparatus of the present invention.

FIG. 2 is a rear view of the camera of FIG. 1 in an assembled state.

FIG. 3 is a plan view showing a part of the film box shown in FIG.

FIG. 4 is a vertical cross-sectional view taken along a plane passing through both sides of the film box shown in FIG.

5 is a vertical cross-sectional view of the film box of FIG. 2 taken along the center in the left-right direction.

FIG. 6 is a partial explanatory view showing a state where a hoisting lever is attached to one side of the film box shown in FIG.

7 is a vertical cross-sectional view of FIG. 6 taken along a plane extending in the left-right direction. Sectional view toward

FIG. 8 is a schematic explanatory view of a film box showing a second embodiment of the present invention.

FIG. 9 is a cross-sectional view of essential parts showing a second embodiment of the present invention.

10 is a plan view of a main part of the film box shown in FIG.

[Explanation of symbols]

 4 ... Film box 11 ... 1st motor 13 ... Film rewinding shaft 14 ... 1st clutch 26 ... 2nd motor 30 ... Sprocket 32 ... Spool (film winding shaft) 49 ... Interlocking rod (interlocking member)

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hideo Hibashi 75-1 Hasunumacho, Itabashi-ku, Tokyo Topcon Co., Ltd.

Claims (1)

[Claims] 1. A film rewinding shaft and a first motor for film rewinding are provided on one side of a film box, and a first clutch that is disengaged by a moving operation in a plane perpendicular to the film rewinding shaft is provided. The first motor is interlocked with the film rewinding shaft via the film rewinding shaft, and the second motor for film winding, the film winding shaft and the sprocket shaft for detecting the film winding amount, which are arranged in parallel with each other, are connected to the film box. The second motor is linked to at least one of the film winding shaft and the sprocket shaft via a second clutch that is mounted on the other side and is intermittently operated by operating in the same direction as the first clutch. Both clutches are interlocked by the interlocking member so that the other turns off when it is on, and each clutch turns on.
・ In the film winding / rewinding switching mechanism of the photographic device in which the first and second motors that operate according to the OFF state are turned on and off, the first and second clutches move in the operating direction of each clutch. The film winding / rewinding switching mechanism of the photographing device, which is interlocked by the interlocking member.