JP2003248264A - Camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera by which film is surely fed with ease with a small number of parts even by eliminating the need of a guide sheet and which is miniaturized. <P>SOLUTION: 135 film 12 is used in the camera 1, and one part of the side wall of a spool chamber 2B formed at a camera main body 2 is formed of a front cover 3 and a back cover 4, and first and second film guide parts 14 and 15 consisting of several ribs formed so as to be nearly concentrically circular with a spool 10A are provided at end parts, and a third film guide part 13 consisting of several ribs formed so as to be nearly concentrically circular with the spool 10A is provided at the end part of the camera main body 2. The second film guide part 15 and the third film guide part 13 are arranged so that they are alternate in the axial direction of the spool 10A and the end parts in a circumferential direction are overlapped, and the diameter R3 of the end part of the third film guide part 13 is formed larger than the diameter R2 of the second film guide part 15. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera capable of automatically feeding a film (hereinafter referred to as "autoload"), and more particularly to a camera having a simple structure and capable of reliably autoloading with a small number of parts.

[0002]

2. Description of the Related Art Conventionally, in auto-loadable cameras, miniaturization of the camera body has been desired for convenience of carrying, and the manufacturing cost is reduced by reducing the number of parts and simplifying the manufacturing process. There is also a strong demand for reduction of Furthermore, downsizing of the camera. It is also desired that the automatic feeding of the film be reliably performed with a simple structure while reducing the manufacturing cost.

In response to such demands, many proposals have been made for this type of camera, and among the related arts, for example, Japanese Utility Model Application Laid-Open No. 62-103030, which was proposed by the applicant of the present application together. The automatic loading spool described in the publication and Japanese Patent Laid-Open No. 2001-305
There is a film feeding device described in Japanese Patent No. 641.

The proposal disclosed in Japanese Utility Model Laid-Open No. 62-103030 is such that a movable claw for engaging a perforation, which is disposed at one end of a spool shaft for winding a film, and the spool shaft. A film tip portion that has a tendency to project from the peripheral surface of one side end portion, is provided to be able to move in and out of the spool shaft, is moved by engaging with the movable claw, and is wound around the body circumference of the spool shaft. Is disclosed, a technique relating to an auto-loading spool is disclosed, which is provided with a protrusion that forms a gap for guiding between the following film and the circumference of the spool shaft cylinder.

Further, the proposal described in Japanese Patent Laid-Open No. 2001-305641 is arranged around a spool in a film feeding device having a film guide member arranged in a spool chamber having a spool for winding a film, And a flexible sheet member having an engaging portion that engages with the spool chamber for guiding the fed film so as to wind around the spool. The technology regarding is disclosed.

Both related arts have a structure in which a guide sheet arranged in a spool chamber is used to guide a film to be fed.

[0007]

However, in the proposal described in Japanese Utility Model Laid-Open No. 62-103030, since the guide sheet is used to guide the film as described above, the number of parts and the number of assembling steps are increased. Therefore, it is impossible to simplify the manufacturing process and reduce the manufacturing cost.

On the other hand, in the proposal disclosed in Japanese Patent Laid-Open No. 2001-305641, the side wall of the spool chamber formed in the camera body is formed by a front cover as an exterior body in order to downsize the camera body. However, with such a structure alone, there is a step on the side wall (corresponding to the film guide portion) of the spool chamber formed by the camera body and the front cover. There is a risk of defective feeding. For this reason,
There is a problem that it is difficult to reduce the size of the camera by eliminating the guide sheet.

Therefore, the present invention has been made in view of the above-mentioned problems, and even without the need for a guide sheet, the film can be fed easily and reliably with a small number of parts, and the size of the camera can be reduced. It is an object of the present invention to provide a camera capable of achieving the following.

[0010]

According to another aspect of the present invention, there is provided a camera main body having a film winding chamber, an exterior member for covering the camera main body, and a rotatably supported inside the film winding chamber. A film winding shaft, and a first film guide portion provided on the exterior member and having an end formed substantially concentrically with the film winding shaft,
A second film guide portion provided on the camera body, the end portion of which is formed substantially concentrically with the film winding shaft; and the diameter of the end portion of the second film guide portion is the first film guide portion. It is characterized in that it is larger than that of the No. 1 film guide section. A camera according to a second aspect of the present invention is a camera that uses a 135 film housed in a patrone having a film winding shaft protruding at one end, and a patrone chamber for accommodating the patrone and a patrone accommodated in the patrone chamber are provided. A film winding chamber for winding and storing a film; a film winding shaft rotatably supported in the film winding chamber for winding the film; a drive mechanism for rotationally driving the film winding shaft; A plurality of first film guide portions provided on the exterior member, the ends of which are substantially concentric with the film winding shaft, and the camera body, the ends of which are substantially concentric with the film winding shaft. A plurality of second film guide portions formed in a strip shape,
The first film guide portion and the second film guide portion are arranged so that their ends in the circumferential direction alternate and overlap in the axial direction of the film winding shaft, and at least in this overlapping portion, the second film guide portion The diameter of the end portion of the film guide portion is larger than that of the first film guide portion.

A camera according to a third aspect of the present invention is the camera according to the second aspect.
In the camera described in (1) above, the second film guide portion is arranged from the vicinity of the center of the film in the width direction of the film to the protruding side of the film winding shaft of the cartridge.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of a camera of the present invention, FIG. 1 is an exploded perspective view showing main assembly components and a schematic assembly configuration of the camera, and FIGS. 2 and 3 are drawings of the present invention. 2 is a perspective view showing the shape of film guide ribs provided on the front cover and the camera body, and FIG. 3 is a perspective view showing the shape of film guide ribs provided on the rear cover. FIGS. 4A and 4B are cross-sectional views of main parts of the camera for explaining the configuration and operation of the more detailed characteristic components of the present invention.

As shown in FIG. 1, main components constituting the camera 1 of the present embodiment include a cartridge chamber 2A for loading the 135 film 12, a spool chamber 2B for winding the 135 film 12, and the like. Camera body 2
And a front cover 3, a rear cover 4 and a rear lid 5 as an exterior body for fixing the camera body 2 while sandwiching it, and a lens frame unit 6 having a photographing optical system fixed to the camera body 2.
A finder unit 7 fixed to the upper part of the camera body 2, a strobe unit 8 provided alongside the finder unit 7, and a film feeding unit 10 fitted in the camera body 2. .

The front cover 3 and the rear cover 4 to which the rear lid 5 is attached so as to be openable and closable are exterior bodies which form the outer appearance of the camera 1 by being fitted while sandwiching the camera body 2.

A barrier 3a is provided on the front surface of the front cover 3. The barrier 3a is slidably arranged in the direction along the front surface of the front cover 3, that is, in the direction orthogonal to the optical axis of the photographing optical system 6a (described later). This barrier 3
When a is photographed by the camera, by sliding a to the left in FIG. 1, a can interlock with a power switch (not shown) in the camera to turn on the power of the camera. Further, the barrier 3a turns off the power supply of the camera in conjunction with the power switch in the same manner as above by sliding the barrier 3a to the right as shown in FIG. In addition to the above, components such as the photographing optical system 6a and the lens barrel 6b and the finder window (not shown) arranged on the front side of the camera 1 are covered and protected.

Further, in the camera 1 of the present embodiment, when the barrier 3a is opened from the closed state, the lens barrel 6b in the collapsed state is set up at the wide end (the photographing position where the shortest focus is obtained). It is like this. The state shown in FIG. 1 represents that the barrier 3a is closed.

Various operating members and the like are arranged on the peripheral surface of the front cover 3, and a part of various constituent members arranged inside is arranged at a predetermined position so as to be exposed to the outside. ing. For example, the upper surface of the front cover 3 is used to perform various setting operations such as a release button 3b which is an operation member to be operated when starting a shooting operation, a shooting mode / internal clock setting / a setting relating to a flash function. It is composed of operation members such as a plurality of mode switching operation buttons 3d which are operation members, liquid crystal display (LCD), etc., and photographing mode information and date / time information.
A display panel 3e and the like for displaying the state information and the like of the camera in a predetermined form such as pictures and characters are arranged so that the state information and the like of the camera can be visually recognized. Further, at a predetermined position on one end side of the upper surface of the front cover 3, there is arranged a zoom lever 3c which is operated when the zooming operation of the photographing optical system 6a is performed.

On the front surface of the front cover 3, the front surface of the light emitting portion in the strobe unit 8 is protected at a predetermined position near one of the upper edge portions, and flash light from the light emitting portion is emitted to a subject in front of the camera 1. A stroboscopic light emission window 3f for irradiating a predetermined range is arranged.

An opening 3A is formed in the front cover 3 at a substantially central portion thereof, and a lens frame unit 6 (described later) fixed to the camera body 2 is arranged in the opening 3A. It is like this. That is, in the opening of the front cover 3,
A photographing optical system 6a for transmitting a subject light flux that contributes to photographing and for forming a subject image on the light receiving surface of the 135 film 12 arranged inside the camera is arranged while being held by the lens barrel 6b. become.

On the other hand, the rear cover 4, which is an exterior body, is provided with an opening 4A at a predetermined position substantially in the center on the back surface side.
The back cover 5 is configured to be openably and closably attached by a hinge structure including a rotating pin 9 and a bearing portion 5a formed on the rear side edge portion of the rear cover 4 so as to seal the. In addition, at a predetermined position on the opposite edge of the rear cover 4, a locking member (not shown) is arranged on the locking portion 4a for locking the closed state of the rear cover 5, and the rear cover 5 is closed. In this state, the locking claws 5d provided at the corresponding positions of the rear lid 5 are engaged with the locking members, so that the closed state of the rear lid 5 is locked. On the other hand, 13
When the rear lid 5 is opened when the 5 film 12 is attached or detached, the locked state may be released by sliding the locking member arranged on the rear cover 4.

Further, four mounting holes 4b for fitting and fixing the front cover 3 with screws or the like are formed at four predetermined positions on the outer peripheral edge of the rear cover 4.

The rear lid 5 is formed with a bearing portion 5a of a rotating pin 9 for mounting the rear cover 4 and the rear cover 4 in an openable and closable manner at the base end portion thereof, and in the optical axis direction (in the optical axis direction) at a substantially central portion on the inner surface side. A pressure plate 5b biased with a predetermined pressure is provided in the camera body side direction. Further, a portion adjacent to one side of the pressure plate 5b is provided with a predetermined direction with respect to the optical axis direction (camera body side direction). A guide roller 5c having an elastic property of being biased by pressure is provided. That is, in the camera 1, when the rear cover 5 is in the closed state, the pressure plate 5b forms an optimum gap between the camera body 2 and the loaded 135 film 12, and the guide roller 5c is , A roller portion 5e rotatably provided at the base end thereof,
When the 135 film is wound around the 0A, the roller portion 5e has a role of guiding while contacting the surface of the 135 film 12.

The camera body 2 is a main constituent member mainly including various electronic parts, optical system members, various driving mechanisms, and the like, and the lens frame unit 6 covers the aperture 2C formed near the center. It is supposed to be fixed.

The lens frame unit 6 holds an image pickup optical system 6a composed of a plurality of lens groups for taking in subject light, and holds the image pickup optical system 6a. A lens barrel 6b made up of a plurality of lens frames that can be moved back and forth in the optical axis direction with respect to a shooting position protruding from the main body 2, and these image pickup optical system 6a and lens barrel 6b can be driven back and forth in the optical axis direction. A fixed frame 6A (corresponding to reference numeral 50 in FIG. 4) for mounting and fixing to the camera body 2, and a flexible substrate 6c electrically connected to a drive mechanism section for zooming drive of the lens barrel 6b.
It is mainly composed of etc. The attachment to the camera body 2 is performed by positioning the positioning portion (not shown) of the fixed frame 6A in the vicinity of the aperture 10 of the camera body 2.
It is adapted to be positioned and fixed with high precision by fitting it to the screw and screwing it with a screw.

Further, the camera body 2 includes the aperture 2
A film feeding unit 10 installed below C feeds the 135 film 12 loaded in the cartridge chamber 2A on the left side in the drawing to the spool chamber 5 on the right side, and rewinds the wound film. Has been done.

The film loaded in the cartridge chamber 2A is a 135-size film in this embodiment. Therefore, the 135 film 12 is a film 12b wound around the winding shaft 12a as shown in FIG. The cartridge 12 is provided with a cartridge 12A that covers the inside of the cartridge and is housed inside, and the winding shaft 12a is configured to project above the cartridge 12A in the figure. Also, 135
In the film, the leading end portion of the film 12b pulled out from the cartridge 12A is the winding shaft 1
The end of the 2a opposite to the protruding direction is cut out so that its width is narrowed. Furthermore, as is well known,
Perforations 12c are formed at both edges of the film 12b housed in the cartridge 12A so as to be hooked on spool claws 16 provided at predetermined positions on the outer periphery of the spool 10A to transmit the rotational driving force of the spool 10A. .

As shown in FIG. 1, the film feeding unit 10 includes a substrate (jetter) 10a, a spool 10A rotatably mounted on one end of the substrate 10a, and a spool 10A rotated on the other end of the substrate 10a. A rewinding engaging portion 10c that is drivably mounted, a motor 11 that is fitted and mounted in the spool 10A and is a rotational driving force source accompanying the feeding of the 135 film 12, and a rotational driving force of the motor 11. Rewinding gear train 10 for meshing with the spool 10A and the rewinding engaging portion 10c by a plurality of gears for transmission.
It is mainly composed of b and.

The film feeding unit 10 having the above structure is
At the same time as the spool 10A is fitted into the opening 2a formed in the upper and lower sides of the spool chamber 2B of the camera body 2, the winding engagement portion 10c is formed in the lower portion of the cartridge chamber 2A of the camera body 2 (not shown). ), And then attached to the bottom surface of the camera body 2.

As shown in FIG. 1, a finder unit 7 having a finder optical system is mounted on the upper surface of the camera body 2 in the vicinity of the aperture 2C, and strobe light is emitted on the upper surface of the spool chamber 2B. A strobe unit 8 including a portion and a portion such as a reflector is attached.

By the way, the camera 1 according to the present embodiment is an improvement for easily and reliably feeding a film with a small number of parts even if a guide sheet is not required, and for downsizing the camera. Has been done.

That is, in the present camera 1, a part of the side wall of the spool chamber 2B formed in the camera body 2 is formed by the front cover 3 and the rear cover 4, and the spool 1 is formed at the ends thereof.
The first and second film guide portions 14 and 15 are formed of a plurality of ribs that are substantially concentric with 0A, and the end of the camera body 2 is formed of a plurality of ribs that are substantially concentric with the spool 10A. A third film guide portion 13 is provided and configured. In this case, the second film guide portion 15
The third film guide portion 13 and the third film guide portion 13 are arranged so as to alternate in the axial direction of the spool 10A and overlap with each other in the circumferential direction.
At least in this overlapping portion, the diameter of the end portion of the third film guide portion 13 is equal to that of the second film guide portion 1.
5 is larger than that of the second film guide portion 1
The diameter at the end of 5 is larger than that of the first film guide portion 14.

Further, the characteristic configuration of the camera 1 of the present embodiment will be described in detail with reference to FIGS. 2 to 4.

In the camera 1 of the present embodiment, as shown in FIG.
As shown in FIG. 3, a first film guide portion 14 including a plurality of ribs 14a to 14h formed substantially concentrically with the spool 10A is provided at the end of the rear cover 4. The first film guide portion 14 has a plurality of ribs 14a to 14a.
The h is formed integrally with the rear cover 4 so as to stand at predetermined positions. The tip surfaces of these ribs 14a to 14h function as side walls of the spool chamber 2B,
As shown in the cross-sectional view of FIG. 4, when the 135 film 12 is fed, the shape thereof is R which is necessary for the leading end of the film 12a to come into contact with and smoothly guide the film 12a toward the spool 10A.
It is formed in a shape.

On the other hand, at the end portion of the front cover 3, as shown in FIG. 2, the second film guide portion 15 comprising a plurality of ribs 15a to 15j which are formed substantially concentrically with the spool 10A.
Is provided. The second film guide portion 15 is
The plurality of ribs 15a to 15j are integrally formed with the front cover 3 so as to stand upright at predetermined positions. The tip surfaces of these ribs 15a to 15j function as side walls of the spool chamber 2B, and their shapes are the same as those of the first film guide portion 14 as shown in the sectional view of FIG.
When the film 12 is fed, the leading end of the film 12a comes into contact with the film 12a and is formed into an R shape necessary for smoothly guiding it toward the spool 10A. In addition, in the present embodiment, the ribs 15c to 15e corresponding to the abutting positions where the leading ends of the films of the 135 film 12 abut are arranged such that the arrangement intervals thereof are narrowed.

Further, in the present embodiment, as shown in FIG. 2, a plurality of ribs 13a formed substantially concentrically with the spool 10A are provided at the end of the camera body 2 on the spool chamber 2B side.
It is constituted by providing a third film guide portion 13 composed of 13c. Since the third film guide portion 13 uses the 135 film 12, the 135 film 12
The film 12b is arranged above the camera from the vicinity of the center of the film 12b in the width direction so as to correspond to the arrangement position (the long hub side) of the film front end. That is, the film front end portion of the 135 film 12 is surely brought into contact with the third film guide 13.

As shown in FIG. 4, the third film guide portion 13 and the second film guide portion 15 are arranged so as to overlap each other by an angle θ in the circumferential direction. For example, as shown in FIG. 2, the rib 13a of the third film guide portion 13 is fitted in the circumferential direction between the rib 15c and the rib 15d of the second film guide portion 15 by an angle θ, and similarly, the rib 13b is formed. A rib 13c is arranged between the rib 15d and the rib 15e by being fitted between the rib 15e and the rib 15f.

Further, in the present embodiment, as shown in FIG. 4, the distance dimension (diameter) from the center of the rotating shaft of the spool 10A to the first film guide portion 14 is R1 and the distance to the second film guide portion 15 is R1. If the distance dimension (diameter) is R2 and the distance dimension (diameter) to the third film guide portion 13 is R3,
The first to third film guide portions 14, 15 and 13 are arranged and arranged so that the relationship of R1 <R2 <R3 is established.

The camera 1 of this embodiment is provided with two guide rollers 5c and 17 to guide the winding of the film 12b around the peripheral surface of the spool 10A accompanying the film feeding. The roller 5e is arranged on the inner surface side of the rear lid 5 as described above, and the other guide roller 1
As shown in FIG. 2 or FIG. 4, 7 is configured by providing a rotatable roller portion 17a at its base end portion, and is arranged at a predetermined position in the spool chamber 2B of the camera body 2 and It has an elastic characteristic of urging the roller portion 17a so as to come into contact with the peripheral surface of the spool 10A with a predetermined pressure.
That is, like the guide roller 5e, this guide roller 17 is used to feed the spool 10A during film feeding.
When the 135 film is wound around the roller, the roller portion 17a has a role of guiding while contacting the surface of the 135 film 12.

With the above structure, the 135 film 12 can be fed while being guided so as to be surely wound around the spool 10A without being scratched by the outer wall of the spool chamber, and the guide sheet conventionally required can be eliminated. It becomes possible.

Next, the operation of film feeding, which characterizes the camera 1 of this embodiment, will be described in detail with reference to FIG.

Now, it is assumed that the 135 film 12 is loaded in the cartridge chamber 2A of the camera 1 having the above structure. In this case, in the camera 1 of the present embodiment, the 135 film 1
When the cartridge 2 is loaded in the cartridge chamber 2A and the rear lid 5 is closed, the automatic loading operation by the film feeding unit 10 is started.

At this time, the pressure plate 5b presses the pressure plate rail by its urging force, and a film passage is formed between the pressure plate 5b and the surface of the film rail 2d. The film surface of the 135 film 12 arranged in this passage is spooled. It is sandwiched between the peripheral surface of 10A and the roller portion 5e of the guide roller 5c.

The spool 10 provided in the spool chamber 2B
When A is driven to rotate, the spool pawl 16 causes the perforation 12 of the 135 film 12 to move as shown in FIG.
The driving force is transmitted by being caught by c
The film 12 is fed between the peripheral surface of the spool 10A and the roller portion 5e of the guide roller 5c while being fed in the film feeding direction (direction of arrow A) shown in FIG. The leading end portion of the film 12 is on the side wall side of the spool chamber 2B (on the side of the first film guide portion 14).
Is sent to. The guide roller 5c at this time
Is the initial position L of film winding as shown in FIG.
No. 1 is arranged, and the surface of the 135 film 12 to be fed is pressed against the peripheral surface of the spool 10A with a predetermined pressure.

The control unit (not shown) of the camera 1 is 135
The film feeding unit 10 is controlled, that is, the motor 11 is controlled to drive the rotation of the spool 10A until the photographing area of the film 12b corresponding to the first frame of the film is set on the aperture 2C.

Then, the front end of the 135 film 12 is
By the rotational force generated by the engagement of the spool claw 16 with the perforation 12c, the spool claw 16 is guided to the front cover 3 direction side (downward in the figure) of the spool chamber 2B while contacting the end surface of the first film guide portion 14. At this time, since the contact angle of the leading end of the 135 film 12 with the first film guide portion 13 is less than 90 degrees, the 135 film 12 is reliably and smoothly guided in the winding direction (downward direction shown in the drawing). Will be.

After that, when the film feeding operation by the rotational force of the spool 10A progresses, the leading end of the 135 film 12 is fed while abutting on the side wall of the spool chamber 2B (on the end face of the first film guide 14). , And contacts the end surface of the second film guide portion 15 while passing through the boundary between the first film guide portion 14 and the second film guide portion 15. At this time, in the present embodiment, the distance dimension (diameter) R1 from the center of the rotation axis of the spool 10A to the first film guide portion 14 is larger than the distance dimension (diameter) R2 to the second film guide portion 15. It is composed, and also 13
5 first film guide portion 14 at the tip of film 12 and first film guide portion 14 and second film guide 15
Since the contact angle with the boundary portion with is less than 90 degrees, the leading end of the 135 film 12 is guided by the first film guide portion 14 without being caught, and the winding direction is surely and smoothly (in the figure). And is fed onto the end surface of the second film guide portion 15.

When the film feeding operation further progresses, the leading end portion of the 135 film 12 slides while contacting the end surface of the second film guide portion 14 and the second film guide portion 14 in the circumferential direction. It comes into contact with the end surface of the third film guide portion 13 while passing through the boundary portion with the third film guide portion 13 overlapping by the angle θ. At this time, in the present embodiment, the distance dimension (diameter) R2 from the center of the rotation axis of the spool 10A to the second film guide portion 15
Is the distance dimension (diameter) R to the third film guide portion 13.
And the contact angle of the tip of the 135 film 12 to the second film guide portion 15 and the boundary portion between the second film guide portion 15 and the third film guide 13 is 90 degrees. Is less than
35 The tip of the film 12 does not get caught in the second
While being guided by the film guide portion 15, it is reliably and smoothly guided in the winding direction (downward direction shown in the drawing) and is fed onto the end surface of the third film guide portion 13.

Thereafter, as the film feeding operation progresses,
The leading end of the 135 film 12 slides while abutting on the end surface of the third film guide portion 13 and abutting on the side wall of the spool chamber 2B formed by the camera body 2 in the direction of the guide roller 17 shown in FIG. Will be guided to.

The tip of the 135 film 12 is
As the film feeding operation progresses, the film is guided to the circumferential surface of the spool 10A while being in contact with the inner surface of the guide roller 17, and is then sandwiched between the roller portion 17a of the guide roller 17 and the circumferential surface of the spool 10A. While spool 1
You will be guided to the 0A surface. The guide roller 17 at this time is arranged at the initial position L1 of film winding as shown in FIG. 4, and presses the surface of the 135 film to be fed with a predetermined pressure against the peripheral surface of the spool 10A. There is.

Thus, the guide roller 17 and the spool 1
The leading end of the 135 film which is fed while being sandwiched between the peripheral surface of 0A and the peripheral surface of 0A is guided to the peripheral surface of the spool 10A by contact with the inner surface of the wound film 12b surface. Again, it is wound around the peripheral surface of the spool 10A while being sandwiched between the film surface 12b and the roller portion 5e of the guide roller 5c and the peripheral surface of the spool 10A.

After that, every time the camera 1 takes a picture, the film feeding unit 10 is controlled by a control unit (not shown).
The drive of the motor 11 is controlled by the control of the spool 10
By rotating A, 135 film 12 spool 10A
Take-up is executed.

When the final frame of the 135 film 12 is set, the photographed 135 film 12 is placed on the spool 10A.
By being wound on the two guide rollers 5e,
As shown in FIG. 4, 17 is placed at the position L0 at the time of final film frame setting and wound 135.
The surface of the film 12 is pressed against the peripheral surface of the spool 10A with a predetermined pressure.

The zooming operation of the main camera 1 at the time of photographing is performed by the fixed frame 50 (reference numeral 6A) fixedly supported by the camera body 2 in the lens frame unit 6 as shown in FIG.
(Corresponding to the above), the male helicoid 51a is fitted to the female helicoid 50a, and the rotary frame 51 capable of moving forward and backward in the optical axis direction is driven to a zoom position based on the operation of the zoom lever 3c. Zooming is performed by moving a plurality of lens groups (not shown) housed in the frame 51. In this case, although not shown, the gear portion arranged inside the fixed frame 50 and the gear portion provided at the end portion of the rotary frame 51 mesh with each other to transmit the driving force, so that the rotary frame 51 is moved to the camera. It will be extended or retracted toward the front of the main unit.
Further, in the lens barrel 6b, light-shielding rubber 52 is provided on the inner surfaces of the object-side base end portions of the rotary frame 51 and the fixed frame 50, respectively. It prevents the incidence of light.
Further, the specific configuration is omitted since it is not directly related to the present invention.

After the photographing is completed, in the camera 1, the rewinding gear train 10 is controlled by controlling the drive of the motor 11 of the film feeding unit 10 by a control unit (not shown) as is well known.
By rotating the rewinding engagement portion 10c engaged with the take-up shaft 12a of the 135 film 12 via b, the film 12b that has been photographed can be transferred to the take-up shaft 12a in the cartridge 12A of the 135 film 12. Let it wind. When this rewinding work is completed, the 135 film can be taken out.

Therefore, in the present embodiment, in the camera 1, the side wall of the spool chamber 2B formed in the camera body 2 is formed by the front cover 3 and the rear cover 4, and
The first and second film guide portions 1 each of which has a plurality of ribs formed on the ends thereof in a substantially concentric shape with the spool 10A.
4 and 15 are provided, and the spool 10A is provided at the end of the camera body 2.
Is provided with a third film guide portion 13 composed of a plurality of ribs formed substantially concentrically with the second film guide portion 1.
5 and the third film guide portion 13 are arranged so that the end portions in the axial direction of the spool 10A that are alternate and circumferentially overlap with each other, and the diameter of the end portion of the third film guide portion 13 at least at this overlap portion. Is larger than that of the second film guide portion 15, and the diameter of the end portion of the second film guide portion 15 is larger than that of the first film guide portion 14, thus eliminating the need for a guide sheet. However, the film can be easily and reliably fed with a small number of parts, which greatly contributes to downsizing of the camera.

The present invention is not limited to the above embodiment, and the application of the above embodiment is also applied to the present invention.

Further, in the embodiment of the present invention, the above-mentioned film has been described as a structure using a 135-size film, but the present invention is not limited to this. For example, any film of APS film other than this, or You may use the roll-shaped film for other uses. However, in order to use such a film other than the 135 film, it is necessary to appropriately change the arrangement position of the third film guide rib 13, the arrangement position of the guide roller 17, and the like.

[Supplementary Note] (Supplementary Note 1) In a camera using 135 film accommodated in a cartridge having a film winding shaft protruding at one end, a cartridge chamber for accommodating the cartridge and a cartridge for accommodating the cartridge chamber are provided. A film winding chamber for winding and storing a film, a film winding shaft rotatably supported in the film winding chamber for winding the film, a drive mechanism for rotationally driving the film winding shaft, and the exterior. A plurality of first film guide portions provided on the member, the ends of which are formed substantially concentrically with the film winding shaft; and on the camera body, the film with respect to the first film guide portion. A plurality of second end portions which are provided at a position downstream in the sheet feeding direction and whose end portions are formed substantially concentrically with the film winding shaft. A film guide portion, wherein the first film guide portion and the second film guide portion are arranged so that the end portions in the circumferential direction alternate and alternate in the axial direction of the film winding shaft, At least in this overlapping portion, the second
The diameter of the end of the film guide is larger than that of the first film guide.

(Supplementary Note 2) The first film guide portion is formed in the width direction of the film over substantially the entire spool chamber, and the second film guide portion is formed in the width direction of the film from near the center of the film to the cartridge. Note 1 characterized in that it is arranged on the protruding side of the film winding shaft.
The camera described in.

[0060]

As described above, according to the present invention, it is possible to easily and reliably feed a film with a small number of parts even if a guide sheet is unnecessary, and to downsize the camera. It is possible to provide a camera that can do this.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a camera of the present invention, showing main assembly components and a schematic assembly configuration of the camera.

FIG. 2 is a perspective view showing a shape of a film guide rib provided on a front cover and a spool.

FIG. 3 is a perspective view showing a shape of a film guide rib provided on the rear cover.

FIG. 4 is a cross-sectional view of a main part of the camera for explaining the configuration and operation of the constituent parts that characterize the present invention.

[Explanation of symbols]

1 ... camera 2 ... camera body, 2A ... Patrone room, 2B ... spool room, 2C ... aperture, 3 ... Front hippo, 4 ... back hippo, 5 ... rear lid, 5b ... pressure plate, 5c, 17 ... guide roller, 6 ... Mirror frame unit, 6a ... Imaging optical system, 6b ... lens barrel, 7 ... Finder unit, 8 ... Strobe unit, 10 ... Film feeding unit, 10A ... spool, 10a ... substrate (die), 10b ... Rewinding gear train, 11 ... motor, 12 ... 135 films, 12A ... Patrone, 12a ... winding shaft, 12c ... perforation, 13 ... Third film guide portion, 13a to 13c ... ribs, 14 ... First film guide portion, 14a to 14h ... ribs, 15 ... Stand 2 Film guide part, 15a to 15j ... ribs, 16 ... spool claw, 17 ... Guide roller.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2H020 DD01 DD04 EA01 EA03 EA04                       EA06 MC01 MC11 MC91 MC94                 2H100 AA31 AA41 BB05 BB06

Claims (3)

[Claims] 1. A camera body having a film winding chamber, an exterior member covering the camera body, a film winding shaft rotatably supported in the film winding chamber, and provided on the exterior member, A first film guide portion whose end portion is formed substantially concentrically with the film winding shaft; and a second film guide portion which is provided on the camera body and whose end portion is formed substantially concentrically with the film winding shaft. A film guide portion, wherein the diameter of the end portion of the second film guide portion is larger than that of the first film guide portion. 2. A camera using a 135 film housed in a patrone having a film take-up shaft protruding at one end, wherein a patrone chamber accommodating the patrone and a film in the patrone accommodated in the patrone chamber are wound and accommodated. A film winding chamber, a film winding shaft that is rotatably supported in the film winding chamber and that winds the film, a drive mechanism that rotationally drives the film winding shaft, and the exterior member. A plurality of first film guide portions whose end portions are formed substantially concentrically with the film winding shaft, and the camera body, and the end portions being formed substantially concentrically with the film winding shaft. A plurality of second film guide portions, wherein the first film guide portion and the second film guide portion are The film winding shafts are arranged such that their ends alternately in the axial direction and in the circumferential direction overlap with each other, and at least in this overlapping part, the diameter at the end of the second film guide part is equal to that of the first film guide part. A camera characterized by being larger than one. 3. The camera according to claim 2, wherein the second film guide portion is arranged from a vicinity of a film center in a width direction of the film to a protruding side of a film winding shaft of the patrone. .