JPH0611765A - Film winding device - Google Patents

Abstract

PURPOSE:To obtain a film winding device for a camera capable of executing sure autoloading operation by restraining the inclination of film. CONSTITUTION:This device is equipped with a film supply chamber 12 arranged to communicate with one end of a film path 14 faced to a photographing lens 22, a 1st sprocket 43 feeding the film 48 supplied from film supply chamber 12 toward the film path 14, a film take-up chamber 39 arranged to communicate with the other end of the film path 14 at the rear of the other end thereof, a 2nd sprocket 40 provided between the other end of the film path 14 and the film take-up chamber 39 and feeding the film by changing the feeding direction of the film 48 toward the film take-up chamber 39, a film guide 62 and a film pressing roller group 41 which are arranged near the outer peripheral part of the 2nd sprocket 40 and press-contact the film 48 fed by the 2nd sprocket 40 to the outer peripheral part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film winding device, and more particularly, to a film winding device for a camera in which a film is folded back from a film passage and wound by a spool.

[0002]

2. Description of the Related Art The applicant of the present invention has previously proposed, in Japanese Patent Laid-Open No. 4-30137, a technique in which a film is folded back from a film passage and wound by a spool. In the prior art, a sprocket and a film guide are provided when the film is folded back, and the gap between these members is extremely narrowed to limit the degree of freedom of the film passing through the gap and to prevent the inclination of the film. It is designed to prevent it.

[0003]

By the way, in the above prior art, if the gap between the sprocket and the film guide is too narrow, the surface of the film passing through the gap may be damaged. Therefore, there is a limit in reducing the gap, and it is still incomplete for preventing the film from tilting and performing reliable auto-loading.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a film winding apparatus for a camera that can perform a reliable auto-loading operation by suppressing the inclination of the film.

[0005]

In order to achieve the above object, a film winding apparatus according to the present invention is provided with a film supply chamber which is arranged in communication with one end of a film passage opposite to a photographing lens, and which is supplied from this film supply chamber. A first film feeding means for feeding the film toward the film passage, and a rear end of the film passage, which is in communication with the other end of the film passage. A film winding chamber for winding the film supplied through the passage and a film winding chamber provided between the other end of the film passage and the film winding chamber are provided to control the feeding direction of the film fed by the first film feeding means. Second film feeding means for converting the film to the film winding chamber and feeding the film to the film winding chamber, and an outer peripheral portion of the second film feeding means. Placed, a film feeding by feeding the film of the second supply means toward the outer peripheral portion pressed against at a predetermined pressure, are those comprising a film pressing means for feeding improvement.

[0006]

In the film winding apparatus according to the present invention, the film supplied from the film supply chamber is sent out toward the film passage by the first film feeding means, and the first film feeding means is operated by the second film feeding means. The film feeding means changes the feeding direction of the film fed toward the film winding chamber and feeds the film toward the film winding chamber by the film pressing means. The film to be fed is pressed against the outer peripheral portion of the second film feeding means at a predetermined pressure.

[0007]

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

1 and 2 are a central transverse sectional view and a central longitudinal sectional view showing a camera to which the film winding apparatus of the first embodiment of the present invention is applied.

As shown in FIG. 1, a film winding main body 45 having a film winding chamber 39 inside the camera main body 10 is provided.
And a rear cover 36 having a film supply chamber 12 at one end is disposed on one side of the camera body 10 so as to be movable obliquely rearward with respect to the camera body 10. It is installed (see Figure 3). The film supply room 1
2 communicates with one end of a film passage 14 described later,
A film cartridge 46 is loaded. The film 48 pulled out from the film cartridge 46 is delivered toward the film passage 14. Further, the other end 3 of the rear lid 36
The mask 1 is provided in front of 6a in parallel with the front surface of the other end 36a.
7 is provided so that the mask 17 can move integrally with the rear lid 36.

The film passage 14 is formed between the rear surface of the mask 17 and the front surface of the other end 36a of the rear lid 36, and the mask 17 is provided with the vicinity of the outlet of the film supply chamber 12 as a base end. The end is near the leading end of the film, and the feeding direction of the film 48 sent out from the film cartridge 46 is regulated.

In the vicinity of the outlet of the film supply chamber 12, that is, in the vicinity of the base end of one end of the film passage 14, there is a first
A first sprocket 43 as a film feeding means is provided. The first sprocket 43, which will be described in detail later, is driven by the drive mechanism shown in FIG. 4 in the first half of auto loading, and the engaging claws 43a formed on the peripheral surface of the first sprocket 43 extend from the film cartridge 46. It is adapted to engage with the perforations 48a (see FIG. 8) of the film 48 that is being ejected, and to deliver the film 48 toward the film passage 14.

A film winding chamber 39 communicating with the other end of the film passage 14 is formed on one side of the film winding main body 45, that is, on the outer side on the opposite side of the film supply chamber 12. ing. This film winding room 39
From the film supply chamber 12 to the film passage 14
Spool 3 for winding the film 48 supplied via
8 is rotatably installed inside. Further, on the rear side of the film passage 14 and between the other end of the film passage 14 and the film winding chamber 39, the feeding direction of the film 48 fed by the first sprocket 43 is set. A second sprocket 40, which is a second film feeding means for converting the film to the film winding chamber 39 and delivering the film to the film winding chamber 39, is provided. Like the first sprocket 43, the second sprocket 40 is driven by the drive mechanism (see FIG. 4) described later in the first half of the auto loading, and the second sprocket 40 is driven.
The engaging claw 40a formed on the peripheral surface of the
4 perforation of film 48 fed from 4
8a (see FIG. 8) to engage the second sprocket 40.
It is designed to be wrapped around. And the film 4
8 is a spool which is turned so that the feeding direction is rearward.
8 is wound around the peripheral surface of the spool 38 with the emulsifier coating surface facing inward in the radial direction of the spool 38.

The second sprocket 40 and the spool 38 are both driven at a predetermined timing by a drive mechanism (see FIG. 4), which will be described later, like the first sprocket 43.

Further, a film pressing means consisting of a film pressing roller group 41 and a film guide 42 as a film guide means is arranged near the outer periphery of the second sprocket 40 and outside the film winding main body 45. . The film guide 42 is the second sprocket 4
It is an arm having a substantially half-cylindrical shape with a diameter slightly larger than 0, and is arranged so as to cover the inner surface toward the outer side of the outer peripheral portion of the second sprocket 40, and is arranged in the circumferential direction of the guide 42. It is swingably supported by the guide shaft 42a with one side edge side as a base end. As a result, a film feeding path is formed by the inner surface of the film guide 42 and the outer peripheral portion of the second sprocket 40, and the film 48 fed from the first sprocket 43 via the film passage 14 is fed to the feeding path. The feeding direction is changed by being guided, and further, it is wound around the second sprocket 40 as described above.

Two sets of film pressing roller groups 41 are provided at a predetermined interval in the circumferential direction on the inner surface of the film guide 42.
(See FIG. 6), the rollers are arranged so as to be rotatable. Then, as will be described later in detail, each roller of the roller group 41 is elastically contacted with a position facing the outer peripheral surface of the second sprocket 40 directly or through the film 48. In the first embodiment, the film pressing roller group 41 is arranged in two sets.
The present invention is not limited to this, and may be plural sets or one set. Further, although the film guide 42 is swingably supported by the guide shaft 42a as shown in FIG. 1, the supporting means is not limited to this, and any known supporting means may be applied.

A battery 44 for the main power source of the camera is housed on the outer side of the film winding main body 45.

On the other hand, the camera body 10 and the mask 1
7 is a photographing opening 1 that penetrates to the film passage 14 on the rear surface.
6 is formed, and the photographing opening 16 is formed in the camera body 1
It is covered by a focal plane shutter unit 18 arranged in front of 0. A mirror box 20 arranged in front of the focal plane shutter unit 18 in front of the camera body 10 and holding a main mirror 19 (see FIG. 2) and a photographing lens group arranged in front of the mirror box 20. A lens barrel 24 supporting 22 is supported and disposed.

Further, as shown in FIG. 2, the camera body 1 is
Above the 0, as proposed in Japanese Patent Application No. 2-135603, a plurality of mirrors 26a, 26b, 26 having a special shape.
A finder optical system composed of c and the screen mat 20a is arranged.

Further, the camera body exterior housing 28 which covers the above-mentioned various members supported in front of and above the camera body 10 bulges toward the front of the film supply chamber 12 to form a grip portion 28a. There is. A strobe main condenser 30 is housed in the created space between the film supply chamber 12 and the internal space covered by the grip portion 28a, and the strobe 32 is opened and closed on the upper surface of the camera body exterior housing 28. It is supported freely. The strobe reflector 32a of the strobe 32 is located in a recess formed on the upper surface of the camera body exterior housing 28 and protected from external force when the strobe 32 is arranged in the closed position shown by the solid line in FIG. When the strobe 32 is arranged in the open position shown by the chain double-dashed line in FIG. 2, the strobe 32 is detached from the concave portion and directed toward the front of the camera.
Furthermore, the camera body exterior housing 28 supports the eyepiece lens 34 at a position facing the mirror 26c arranged at the final position of the finder optical system.

The rear surface of the camera body 10 supports a film winding body 45, and the mask 17 is supported by a rear lid 36 movably supported between an open position and a closed position. Is held in the open position as shown in FIGS. 1 and 2 by a rear lid locking member (not shown) provided at the right end of the camera body 10.

In the first embodiment, when the shutter button (not shown) provided on the upper surface of the grip portion 28a of the camera body exterior housing 28 is pressed, the mirror box 20 is pressed.
The main mirror 19 therein rotates upward from the position shown in FIG. 1, and then the focal plane shutter unit 18
The image which the photographer was looking through the eyepiece lens 34 immediately before pressing the shutter button, that is, the image captured by the photographing lens group 22 due to the opening of the film 48 facing the photographing opening 16 of the film passage 14. Is photographed in the one-frame area.

The main mirror 19 and the focal plane shutter unit 18 have an exposure time based on an exposure signal from an exposure meter disposed at an appropriate position of the screen mat 20a at the upper opening of the mirror box 20 or the camera body exterior housing 28. After a lapse of time, it is returned to the lower position shown in FIG. 1 and closed.

When the shooting of one frame of the film 48 is completed, the spool 38 is driven to rotate, and the second sprocket 40 that freely rotates from the film passage 14 guides the spool 38 toward the spool 38. As described above, the emulsifier-coated surface is wound with the spool 38 facing inward in the radial direction.

FIG. 3 shows a camera to which the film winding apparatus of the first embodiment is applied, in which the rear lid 36 is attached to the camera body 1
FIG. 3 is a central cross-sectional view showing the camera when it is moved to one side from 0 and is in an open position.

A new film 48 is loaded into the camera,
That is, when the film cartridge 46 having the film 48 is loaded, the rear lid 36 is moved to the open position as shown in FIG. 3, and the film supply chamber 12 in the rear lid 36, the mask 17, and the rear lid 36 are moved. The film passage 14 formed by the other end portion 36a is exposed. After this,
The film cartridge 46 having the new film 48 is correctly stored in the film supply chamber 12, and the film leader portion 48c of the film 48 pulled out from the film cartridge 46 is arranged along the film passage 14. Next, the rear lid 36 is moved to the closed position, and is held at the closed position by the above-mentioned rear lid locking member provided on the right end portion of the camera body 10 and not shown in FIGS.

As described above, the film cartridge 4 is used.
When 6 is loaded in the film supply chamber 12 and the rear lid 36 is moved to the closed position, the film leader portion 48c of the film 48 extending from the film cartridge 46 is moved to the first position.
It is in contact with the peripheral surface of the sprocket 43.
The perforation 48a of the film 48 has an engaging claw 43a formed on the peripheral surface of the first sprocket 43.
Is engaged with. Next, the driving means (see FIG. 4), which will be described later, first selectively drives the first sprocket 43 and the second sprocket 40 by the closing position holding operation of the rear lid locking member. As a result, the film leader portion 48c in the film passage 14 is delivered from the first sprocket 43 toward the second sprocket 40.

The tip of the film leader portion 48c is guided by the film guide 42 and the second sprocket 4 is moved.
When it reaches the outer peripheral portion of 0, the perforation 48a of the film leader portion 48c and the second sprocket 40
Engages with the engaging claw 40a formed on the peripheral surface thereof. As a result, the film leader portion 48c moves the second sprocket 4
It is wound around 0, the feeding direction is changed, and it is delivered toward the spool 38.

After a time sufficient for the film leader portion 48c to reach the outer peripheral portion of the spool 38, the first sprocket 43 and the second sprocket 40 are driven by the driving means (see FIG. 4). The driving force is released and it becomes rotatable. As a result, the film leader portion 48c reaching the spool 38 has engaging claws 38a formed on the upper and lower portions of the peripheral surface of the spool 38 (see FIG. 5).
Thus, the spool 38 is wound around the peripheral surface thereof.

After a lapse of a sufficient time for the film leader portion 48c to be wound on the peripheral surface of the spool 38, the driving means stops the selective driving of the spool 38. The film auto-loading operation is performed by such a procedure.

Next, each part in the first embodiment will be described in detail.

FIG. 4 is an enlarged exploded perspective view showing in detail the driving means of the film winding mechanism in the film winding device of the first embodiment.

As shown in the drawing, a drive motor 70 is disposed inside the spool 38 in a known manner. The output gear 70a of the motor 70 meshes with the input gear 96a in the reduction gear train 96. The output gear 96b of the reduction gear train 96 constitutes a sun gear, and meshes with the planetary gear 100 via an arm 98. This planetary gear 100
As is well known, the sprocket drive gear 38b performs a planetary motion in the left-right direction in accordance with the rotation direction of the motor 70 and meshes with the spool drive gear 38b formed at the lower end of the spool 38 and the gear formed at the lower end of the second sprocket 40. Row 40
It selectively engages with c.

A gear 40d is further formed on the upper end of the second sprocket 40 and meshes with the gear 106a. The gear 106a meshes with the gear 106b, and the gear 106b is connected to the planetary gear 1 via the arm 108.
It forms the sun gear that meshes with 10. The arm 10
The rotation of the gear 8 is restricted by the stopper 112, and the planetary gear 110 is properly meshed with the gear 106c.
The gear 106c meshes with a gear 43b formed at the upper end of the first sprocket 43. Further, the motor 70 is controlled in its rotation direction by a motor drive control circuit 104, and the planetary gear 100 is meshed with the sprocket drive gear train 40c in the initial stage of film auto-loading, so that the film winding during the latter half of auto-loading and during filming operation. At the top, it is adapted to mesh with the spool drive gear 38b.

In the above structure, first, the film 48 is loaded as shown in FIG. 3, and then the rear lid 36 as shown in FIG.
Close. By this closing operation, the motor 70 rotates in one direction, and the planetary gear 100 is moved to the sprocket drive gear train 40c.
And the second sprocket 40 and the first sprocket 43 are rotated. As a result, the film 48 is
It is sent to the second sprocket 40 by the sprocket 43, and is sent to the spool 38 by the second sprocket 40. At this time, by setting the rotation speed of the second sprocket 40 higher than the rotation speed of the first sprocket 43, the first sprocket 43 is driven by the film 48 and rotates the gear 106c faster.
08 escapes from the stopper 112 and the planetary gear 110 and the gear 1
The meshing with 06c is released. Therefore, the driving force from the motor 70 is not transmitted to the first sprocket 43, and the first sprocket 43 can rotate only in the film advancing direction.

FIG. 5 is an enlarged sectional view of an essential part showing the second sprocket 40, the film winding chamber 39 and its peripheral portion in the film winding apparatus of the first embodiment. The state of being wound around the second sprocket 40 is shown.

As shown in the figure, near the second sprocket 40 in the film winding chamber 39 of the film winding main body 45, there are a group of film pressing rollers 41 which elastically contact the outer peripheral portion of the second sprocket 40 as described above. A film guide 42 that rotatably supports is supported swingably. A guide roller 60 is provided on one side of the photographing opening 16.
Is rotatably provided. The rear end surface of the guide roller 60 is substantially flush with the film rail surface (not shown). Further, as is known, the rear cover 36 has a pressure spring 66.
The pressure plate 66 is attached by opening a. Further, the film winding main body 45 is provided with film pressing rollers 86 and 88 so as to make elastic contact with the spool 38.

A camera to which the film winding apparatus of the first embodiment is applied uses a JIS135 type film. The leading end portion (leader portion) 48c of the JIS135 type film 48 is a narrow portion with one side edge cut off as shown in FIG. Therefore, in the conventional film winding device, the film
When the film leader portion 48c of the above is wound around the sprocket, the perforation 48a of the film 48 is
Engaging claw above the sprocket (upper claw 4 in FIG. 6)
0a) only. Therefore, when the feeding direction of the film 48 is changed and folded back, the film leader portion 48c is fed while being inclined so that the lower edge thereof spreads downward as shown in FIG. . As a result, the film leader portion 48c is wound around the spool 38 while the perforation 48a is tilted in the direction in which the perforation 48a escapes from the engaging claw 38a of the spool 38, and the perforation 48a is reliably attached to the engaging claw 38a. There was a risk that autoloading would fail without hanging.

In the first embodiment, in order to solve such a problem, when the film leader portion 48c is wound around the second sprocket 40, the film pressing roller group 41 causes the film leader portion 48c to move to the second position. Sprocket 4
The inclination of the film 48 is suppressed by securely pressing the outer peripheral surface of the film 0.

The film pressing roller group 41 will be described below.

FIG. 6 is a sectional view taken along the line AA 'in FIG. 5, that is, the film guide 42 and the film pressing roller group 41 and their peripheral portions in the first half of the automatic loading.

As shown in the figure, the film guide 42 holds the film pressing roller group 41 at a position where it sandwiches the upper and lower sides of the perforation engaging claws 40a and 40b of the second sprocket 40. The film pressing roller group 41 is arranged so as to be axially supported by the roller shaft 41e, together with a film pressing roller shaft 41e arranged between bearing portions 42b projecting above and below the film guide 42. Four film pressing rollers 41a, 4
1b, 41c, 41d, and are rotatably arranged with respect to the second sprocket 40.

Of the film pressing roller group 41,
Two rollers 41 arranged above the roller shaft 41e
The diameters of a and 41b are smaller than the diameters of the other rollers 41c and 41d by the thickness of the film 48. Therefore, the rollers 41c and 41d are connected to the second
When it comes into contact with the outer peripheral surface of the sprocket 40, a gap corresponding to the thickness of the film 48 is generated between the peripheral surfaces of the rollers 41a and 41b and the outer peripheral surface of the second sprocket 40, whereby the film leader of the film 48 is formed. The portion 48c can be reliably fed.

That is, the film 48 wound around the outer periphery of the second sprocket 40 during the automatic loading.
The film leader portion 48c has the roller 41a,
It is inserted into a gap formed by the peripheral surface of 41b and the outer peripheral surface of the second sprocket 40. At this time, the film leader portion 48c and the peripheral surface of the rollers 41a and 41b are
The perforations 48a are reliably pressed against the outer peripheral surface of the sprocket 40, and the perforations 48a are reliably engaged with the engaging claws 40a of the second sprocket 40.
Therefore, reliable autoloading can be performed.

Further, a flange-shaped large-diameter portion 41f is formed below the film pressing roller 41c,
Further, a peripheral groove 40e is formed in a portion of the outer peripheral portion of the second sprocket 40 facing the large diameter portion 41f so as to prevent the rotation of the large diameter portion 41f.

FIG. 7 is an enlarged cross-sectional view of an essential part showing the second sprocket 40, the film winding chamber 39 and its peripheral portion in the film winding apparatus of the first embodiment, and the film 48 in the latter half of the automatic loading. Is above spool 3
8 shows a state of being wound around 8.

As shown in FIG. 7, after the drive force from the motor 70 is not transmitted to the first sprocket 43 and the first sprocket 43 is rotatable only in the film advancing direction, the film 48 is perforated 48a and perforation 48b (FIG. 8). (Refer to) is an engaging claw 38a of the spool 38
The second half of the auto loading is performed by being engaged with and being wound up. Amount of film 4 required for the auto loading
The motor 70 stops rotating when 8 is sent, and then 1
The film is wound one frame at each time of shooting.

FIG. 9 is a sectional view taken along line BB 'in FIG. 7, that is, the film guide 42, the film pressing roller group 41 and its peripheral portion in the latter half of the automatic loading.

After the auto loading is completed, the perforations 48a and 48b are already engaged with the engaging claws 38a of the spool 38 as described above, and it is not necessary to suppress the inclination of the film 48. On the contrary, if the film pressing roller group 41 is in elastic contact with the film 48, the film 48 may be scratched, which is not preferable.

In the first embodiment, as shown in FIG. 9, after the film leader portion 48c of the film 48 has passed the group of the film pressing rollers 41, the film guide 4
2 is swung in a direction away from the outer peripheral portion of the second sprocket 40 so that only the large diameter portion 41f of the roller 41c in the film pressing roller group 41 is in contact with the film 48. Therefore, the other rollers 41a, 41b, 41d of the film pressing roller group 41 do not come into contact with the film 48, and there is no risk of damaging the film 48.

According to the first embodiment, the inclination of the film leader portion 48c of the film 48 during the automatic loading can be suppressed, and the perforation 48a and the engaging claw 38a of the spool 38 can be securely engaged with each other to perform the automatic loading. It is possible to prevent the failure of.

Next, a second embodiment of the present invention will be described.

FIG. 10 is an enlarged sectional view of an essential part showing the second sprocket 40, the film pressing means and their peripheral portions in the film winding apparatus of the second embodiment.

In this second embodiment, the film pressing means is constituted only by a guide member which is an elastic body, and the film guide member 120 alone constitutes the film guide 42 and the film pressing roller group 41 in the first embodiment. They are playing an equivalent role. Since the configuration other than the film pressing means is the same as that of the first embodiment, the description thereof is omitted here.

As shown in the figure, the film guide member 1
20 is arranged at the same position as the film guide 42 in the first embodiment. This film guide member 1
Reference numeral 20 denotes an arm having a substantially half-cylindrical shape having a diameter slightly larger than that of the second sprocket 40, and is arranged so as to cover the inner surface toward the outer side of the outer peripheral portion of the second sprocket 40. The guide shaft 120c has one side edge (the rear side of the camera body 10) in the circumferential direction of the guide member 120 as a base end.
It is swingably supported by. Further, at the free end portion of the film guide member 120, convex portions 120b protruding toward the inner surface are formed at two locations having a predetermined interval in the circumferential direction. Further, the film guide member 120
Has a bent portion 120a bent outward at an acute angle, and a positioning pin 122 is arranged near the inner corner of the bent portion 120a. Then, the convex portion 120b formed at the free end portion is pressed by the positioning pin 122 so as to elastically contact with the opposite position of the outer peripheral surface of the second sprocket 40.

As a result, the film guide member 120
A film feeding path is formed by the inner surface and the outer peripheral portion of the second sprocket 40, and the film 48 fed from the first sprocket 43 through the film passage 14 is guided by the feeding path and is fed in the feeding direction. Further, the second sprocket 4 is changed by the convex portion 120b as described above.
The outer peripheral surface of the second sprocket 40 is pressed against the outer peripheral surface of the second sprocket 40 and is securely wound around the second sprocket 40.

When the film 48 is wound around the outer peripheral surface of the second sprocket 40, the bent portion 120a at the front end of the film guide member 120 is formed by engaging the inner corner of the bent portion 120a with the positioning pin 122. The outward swing of the film guide member 120 is regulated.

FIG. 11 is a plan view showing a modified example of the film guide member 120 in the second embodiment.

FIG. 10A shows the shape of the film guide member 120 described above. Further, FIG. 7B shows an example in which the film guide member 120 shown in FIG. 9A has the same diameter but is bent back to the opposite side, and further, FIG. 7C shows a linear shape. Examples are shown respectively. The modified examples of these film guide members both have the above-mentioned convex portions, and the action and effect thereof are the same as those of the film guide member 120.

In the second embodiment, the convex 120
Although b is formed in two places of the film guide member 120, it is not limited to two places and may be formed in a plurality of places. In addition, the film guide member 120 may be formed without providing the convex portion 120b. Directly on the inner surface of the film
It is also possible to press 8.

According to the second embodiment, as in the case of the first embodiment, the film 48 during automatic loading is also used.
The inclination of the film leader portion 48c (see FIG. 8) can be reduced, and even if the film winding mechanism is shifted rearward, the perforation 48a can be engaged with the engaging claw 38 of the spool 38.
It can be reliably engaged with a.

[0061]

As described above, according to the present invention, by providing the film pressing means elastically contacting the second film feeding means, it is possible to suppress the inclination of the film and perform a reliable auto loading operation. This has the effect of providing a film winding device.

[Brief description of drawings]

FIG. 1 is a central transverse sectional view showing a camera to which a film winding device according to a first embodiment of the present invention is applied.

FIG. 2 is a central vertical sectional view showing a camera to which the film winding device of the first embodiment is applied.

FIG. 3 is a central cross-sectional view showing a camera to which the film winding apparatus according to the first embodiment is applied when the rear lid is moved to one side from the camera body and is in an open position. .

FIG. 4 is an enlarged exploded perspective view showing in detail the driving means of the film winding mechanism in the film winding device of the first embodiment.

FIG. 5 is an enlarged sectional view of an essential part showing the second sprocket and the film winding chamber and the peripheral portion thereof in the film winding device of the first embodiment during the first half of automatic loading.

FIG. 6 is a sectional view taken along the line AA ′ in FIG. 5, that is, a sectional view showing a film guide and a film pressing roller group and their peripheral portions in the film winding device of the first embodiment in the first half of auto loading.

FIG. 7 is an enlarged cross-sectional view of an essential part showing the second sprocket and the film winding chamber and the peripheral portion thereof in the film winding device of the first embodiment during the latter half of automatic loading.

FIG. 8 is an enlarged perspective view showing a film leader portion of a JIS135 type film used in a camera to which the film winding device of the first embodiment is applied.

9 is a cross-sectional view taken along the line BB ′ in FIG. 7, that is, a film guide and a film pressing roller group in the film winding device of the first embodiment and its peripheral portion in the latter half of the automatic loading.

FIG. 10 is an enlarged sectional view of an essential part showing a second sprocket, a film pressing means and its peripheral portion in the film winding device of the second embodiment of the present invention.

FIG. 11 is a plan view showing a modified example of the film guide member in the second embodiment.

[Explanation of symbols]

 10 ... Camera body 12 ... Film supply chamber 14 ... Film passage 17 ... Mask 36 ... Rear lid 38 ... Spool 39 ... Film winding chamber 40 ... Second sprocket 41 ... Film pressing roller group 42 ... Film guide 43 ... First sprocket 46 ... Film Patrone 48 ... Film 48a, 48b ... Perforation 48c ... Film leader section

Claims (3)

[Claims] 1. A film supply chamber arranged in communication with one end of a film passage opposite to a taking lens, and a first film feeding means for feeding a film supplied from the film supply chamber toward the film passage. A film winding chamber which is located behind the other end of the film passage and communicates with the other end of the film passage, and which winds a film supplied from the film supply chamber through the film passage, It is provided between the other end and the film winding chamber, and changes the feeding direction of the film fed by the first film feeding means toward the film winding chamber and toward the film winding chamber. A second film feeding means for feeding and a film to be fed by the second film feeding means which is arranged in the vicinity of the outer peripheral portion of the second film feeding means. A film winding device, comprising: a film pressing means for improving the feeding property, which is pressed against a portion at a predetermined pressure. 2. The film pressing means, a film pressing roller for pressing the film to be fed by the second film feeding means toward an outer peripheral portion of the second film feeding means, and the film pressing roller. 2. The film winding device according to claim 1, further comprising: a film guide unit that rotatably supports the film and defines a feeding direction of the film. 3. The film pressing means comprises an elastic body having a pressing portion for pressing the film to be fed by the second film feeding means toward the outer peripheral portion of the second film feeding means. The film winding device according to claim 1, wherein: