JPS62251734A - Camera - Google Patents

Abstract

PURPOSE:To always surely lead automatically the front end of the leader section of a film to a spool chamber without dropping the front end in an aperture, by providing a specific film leader section guiding mechanism. CONSTITUTION:When the back 19 of a camera is opened and a cartridge P is put in a cartridge chamber 1a, and then, the back 19 is closed, a motor 9 is reversely rotated and a film leader section F is rewound by means of a gear mechanism. When the completion of the rewinding is detected by a film detecting switch 5, the motor 9 is returned to its normal rotation and the film leader section F is driven and sent to a spool chamber 1b side. When the film leader section F brought to the spool chamber 1b, the front end is guided by a film guide plate 58 and never drops in an aperture 1c. When the section F further advances, the perforation of the film is automatically engaged with a sprocket 30 and, since the shoulder section of the film leader section pushes the projected part 61b of an escape lever 61 into the aperture 1c, the film guide plate 58 is pushed into the aperture 1c. As a result, the film leader section F can advance into the spool chamber 1b.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a camera having an automatic film feeding mechanism, and more particularly to a camera that allows film loading to be carried out extremely easily and in which film is automatically fed. It is something.

[Background of the invention]

In conventional cameras that use Hatrone film, loading the film is troublesome, and therefore, several proposals have been made for cameras that allow easy film loading.

For example, Japanese Patent Application Laid-open No. 143550/1983 states that [After loading the /4' Torone into the camera and closing the camera back cover,
A camera has been proposed in which a portion of the film leader exposed outside the camera is removed by locking the back cover.

In addition, Japanese Patent Application Laid-open No. 57-201221 states, ``When a cartridge is loaded into a camera, if a part of the film leader pulled out from the cartridge is too long and protrudes from the spool chamber, the part of the film leader is removed from the spool chamber. A camera with a structure that automatically rewinds the camera to a position that fits the camera has been proposed.

In the camera disclosed in the above two proposals, the film loading operation in a conventional camera (i.e., after loading the cartridge into the cartridge chamber of the camera, manually pulling out a part of the film leader from the cartridge and pulling out part of the film leader by hand) Although it is easier to load film than the series of operations up to positioning the tip on the spool,
In the case of the camera disclosed in the above publication, it is not desirable in terms of operability and safety of the camera because it is necessary to provide a force, a turner, etc. on the camera back cover in order to cut off a part of the film leader. , and also the latter (i.e., JP-A No. 5
In the case of the camera disclosed in Publication No. 7-201221, the entire back cover opens and closes, so you can see everything inside the camera, such as the spool chamber and the anocha area, which gives fear to the photographer and removes dust etc. This method has disadvantages in that it is easy for foreign matter to enter, and furthermore, it is not significantly improved compared to conventional loading operations.

On the other hand, as mentioned above, in cameras that have a structure that allows film loading to be performed more easily than with the conventional loading method, there is a system that automatically guides the tip of a part of the film leader to the spool and automatically winds the tip around the spool. Although this requires a certain amount of technology, there have been few practical and effective proposals regarding a mechanism for reliably guiding the leading end of the film leader to the spool without letting it fall into the aperture.

For example, Japanese Patent Application Laid-Open No. 57-109933 discloses a structure that prevents the tip of a part of the film leader from falling into the aperture. It was impossible to guide the tip to the spool chamber without dropping it into the aguture.

That is, the publication discloses an exposure aperture frame in which a part of the p4-cha part is configured as a rotatable partition plate, and according to such a structure, the tip of a part of the film leader Is that a IJ? - When the film leader passes through the chamber, the curled part of the tip of the film leader comes into contact with the partition plate and the partition plate is rotated, so that the tip of the film leader does not get caught on the wall of the aperture and enters the spool chamber. It says that you can pass.

However, in the case of the above structure, when only a part of the film leader falls into the aperture, the fall can be recovered, but when the entire part of the film leader falls into the aperture, the partition plate There is a drawback that a portion of the film leader is caught in the center of rotation, so that the portion of the film leader cannot be guided into the spool chamber.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a camera with a film leader guide mechanism that can automatically guide the film leader part to the spool chamber without letting the tip of the film leader part fall into the spool chamber. .

[Summary of the invention]

The camera according to the present invention is characterized in that it is equipped with a film leader part guiding mechanism that can guide a part of the film leader to the spool chamber without being restricted in the aperture. In the embodiment shown below, the section guide mechanism has the following structure. That is, the film leader partial guide mechanism is pivoted at its base end at the boundary between the seventh notch and the spool chamber, and is inclined inward of the armature with respect to the film advancing direction. a film guide plate disposed within the gear space; a release lever which is also disposed on the upstream side of the film travel path and whose tip engages with the film guide plate; and a spring for projecting a part of the release lever onto the film travel path through the film guide plate, and the film leader part guide mechanism is configured to prevent the release lever from moving the film when the part of the film leader passes through the annocuture. The tip of a part of the leader is received by the film guide plate and guided along the film guide plate toward the spool chamber and the annular opening is also guided outward so that the part of the film leader is retracted (cut). When the shoulder passes through the anorcture, it forces the film guide plate into the aperture via the relief lever. According to the film leader partial guide mechanism structured as described above,
It is possible to prevent the phenomenon in which a part of the film leader falls into the aperture as in conventionally known film guide mechanisms, and as a result, it is possible to realize an L-shaped film simple loading type camera as shown in the following embodiments. be able to.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings. The camera of this embodiment shown below is an easy-to-load film camera with a novel configuration that was filed by the applicant.In this camera, the length of the part of the film leader exposed from the cartridge is After loading the Nuclear Mother Torone into the camera without worrying, if you close the back cover, the part of the film leader exposed outside the camera will be rewound automatically, and the film will be advanced automatically. .

FIG. 1 is a horizontal cross-sectional view of the camera of this embodiment when the cartridge P is loaded and the back cover is closed. Below, explanations regarding the structure of the camera of this embodiment are given in Figures 1, 2, 4, and 4.
This is done with reference to FIGS. 6 and 7.

In FIG. 1, 1 is a camera body, and the camera body 1 includes a cartridge chamber 1a, a susol chamber Ib, and an a/4'-
A chamber 1c, a back cover pivot portion 1d, a partition wall 10 between the aperture 1c and the spool chamber 1b, and the like are formed. 2
is a film feeding roller, and the film feeding roller 2
is fixed to the shaft 2a, and its surface is covered with a soft material such as rubber. At the top of the shaft 2 &
is fixed to the boot IJ-2b, and is rotationally driven by a power transmission mechanism to be described later through a belt that is placed around the boot IJ-2b.

3 is as shown in Figures 1 and 6. The rear cover has a small opening that exposes only one part of the Trone chamber,
The rear cover 3 is fixed to the front cover 4, and together with the front cover 4 constitutes the external casing of the camera.

A tapered surface 3& is formed at the opening edge of the opening of the rear cover 3, and the tapered surface 3a forms a film entrance path (described later) between it and an engagement surface of a back cover (described later).

A small back cover 19 for closing the opening is attached to the camera body l.
It is pivotally attached to the back cover pivot attachment part 1d with a shaft 20. The back cover 19 also has an engagement surface 1 that engages with the opening edge of the rear cover 3.
9m is configured as a tapered surface having the same inclination as the tapered surface 3a of the opening, and when the back cover 19 is closed, the engaging surface 19m of the back cover 19 and the cheek surface 3a of the rear cover 3 are connected. A film entrance path 6 is formed between them. A light shielding material 7 made of a soft material such as maltbrene is pasted on the engagement surface 19a of the back cover 19 in order to prevent light from leaking into the camera from the film entrance path 6. 7 is pressed against one surface of the film leader part F in the film entrance path 6 when the back cover 19 is closed as shown in FIG.

A film detection switch 5 is attached to the back side of the tapered surface 3a of the rear cover 3 for detecting whether or not the film leader portion F is present in the film entrance path 6. One contact piece 5a of the film detection switch 5 is configured to come into contact with the film leader part F when the film leader part F is present in the film entrance path 6, and is configured to touch the film leader part F in the direction toward the film surface. is biased by the elasticity of Therefore, the contact piece 51 of the detection switch 5 separates from the other contact piece 5b when a film exists in the film entrance path 6, and comes into contact with the other contact piece 5b when no film exists in the film entrance path 6. do.

8 is a spool whose outer periphery is covered with rubber and allows the film to be wound up. 9 is the motor,
It is housed in the spool 8.

Reference numeral 10 denotes a main body roller plate υ, which is rotatably supported by the main body 1 and presses a rotatable roller 12 against the spool 8 by a spring 11. Reference numeral 13 denotes a back cover roller plate, which is formed of a thin plate spring and is configured to move the rear cover 3 so that the rotatable roller 14 at the end contacts the spool 8 by its own elastic force.
Fixed.

15 is a protective glass fixed to the front opening of the front cover 4;
Reference numeral 18 denotes a front plate unit that carries a photographic lens; 16 a pressure plate that guides the film passing through the annocuture 1c and urges the film forward; and 17 that is fixed to the rear cover 3 and moves the pressure plate 16 forward. This is the pressure plate Nonone that is biased in the opposite direction.

21 is a pinch roller (i.e., the first back cover roller) 23
The roller plate 21 is pivotally connected to the back cover 19 by a shaft 21m at one end thereof, and is supported by the back cover 19 so as to be swingable about the shaft 21m. . One end of a spring 22 for pressing the first back cover roller 23 against the film feeding roller 2 is attached to the other end of the roller plate 21, and the other end of the spring 22 is attached to the back cover 19.
It is locked to. Further, a protrusion 21b is formed at a position close to the shaft 21m;
This serves as a stopper for the roller plate 21 when it is opened.

24 is a second back cover row 2 for guiding the film, and is rotatably supported by a holder 25 fixed to the back cover 19.

Reference numeral 26 indicates an arm trone presser spring attached to the back cover 19, 27 indicates a back cover opening/closing knob, 28 indicates a back cover opening/closing lever attached to the back cover 19, 29 indicates a light shielding material, and 30 indicates a quarter of the film.
- A sprocket for detecting the amount of film feeding that is rotated when engaged with a hole.

In addition, in FIGS. 2, 4, and 6, 55 is a finder eyepiece provided on the rear cover 3;
is release getta/.

Next, the film leader partial guide mechanism, which is a characteristic structural part of the camera of this embodiment, will be explained with reference to FIGS. 1, 3, and 4.

As shown in FIG. 1, a hinge portion 1f is provided on the aperture side surface of the partition wall 1 that separates the spool chamber 1b and the annular chamber 1c at a position close to the film running path. A shaft 57 whose axis is parallel to the sgur 8 is provided. In addition, the space within the annocutia la is provided with the shaft 57.
A film guide member, ie, a film guide plate 58, which can swing around a shaft 57 is disposed, and the film guide plate 58 is biased clockwise around a shaft 57 in FIG. 1 by a spring 59 having two prongs. There is. The end of one leg of the spring 59 is engaged with a spring hook provided on the film guide plate 58, and the end of the other leg of the spring 59 is engaged with a spring hook provided on the partition wall 1. It is locked to.

The length of the film guide plate 58 (that is, the length from the center of the shaft 57 to the tip of the film guide plate 58) is a
The width (that is, the length in the direction parallel to the axis 57) is approximately the same as the dimension in the height direction of the aperture 1c, as shown in FIG.

On the other hand, as shown in FIG. 4, a release lever 61 that can be rotated about a shaft 60 fixed to the camera body 1 is disposed at the travel path position of the film shoulder F1 above the annular 1c. As shown in the figure, a pin 61m protruding from the tip of the release lever 61 engages with the upper side edge of the film guide plate 58 at a position near the center of swing. This release lever 61 is an interlocking means that interlocks with the film guide plate 58.

At the running path position of the film shoulders F1 and F,
Guide rails 1h and 1j are provided above and below the camera 1c and extend parallel to each other in the left-right direction.
and F are guided to the right in FIG. 4 while contacting these guide rails.

Upper guide rail 1h that guides the shoulder part F1 of the film
The relief lever 61 is disposed in front of the guide rail lh, and a projection 61b (see FIG. 1) protruding from the back surface of the relief lever 61 is arranged in front of the guide rail lh.
k (see Fig. 4). That is, as shown in FIG. 1, when the film has not entered the area of the annocuture 1c, the release lever 61 is pressed by the spring 59, so that the protrusion 61b is
f 4 Projects into the film running path through the hole 1k inside the trail 1h.

As explained above, the film leader partial guide mechanism installed in the camera of this embodiment has a film guide plate 5.
8, the release lever 61, and the spring 5 that biases both.
It consists of 9.

FIG. 7 is a perspective view showing the gear train of the film winding and rewinding mechanism in the camera of this embodiment. It is assumed that each gear is rotatably supported by a base plate or the camera body 1 (not shown) unless otherwise specified.

In the figure, a motor 9 is housed in the spool 8, and a pinion ear 34 is fixed to the output shaft. 35 to 37 are reduction gears, each of which has two large and small gears that are molded into one body and sequentially mesh with the &=on gear 34 to reduce the rotation transmitted from the motor 9 and generate high torque. . A sun gear 38 meshes with the reduction gear 37 and is supported by a shaft 40 together with the planetary lever 39. 41 is a planetary gear, and the sun gear 38
It is rotatably supported by the planetary lever 39 with appropriate friction. Reference numeral 42 denotes an intermediate gear, which is disposed so as to be able to mesh with the planetary gear 41, and a gear U-42& is fixed to the upper part thereof. Reference numeral 43 denotes a first seven gears, which meshes with the intermediate gear 42 and has a collar portion 43ai on the lower side, and a recess 43b is formed in a portion of the collar portion. A second friction gear 44 meshes with a gear 8a formed integrally with the spool 8. The spring 45 is fitted on the outer periphery of the narrow diameter part, and one end 45m of this spring ring is connected to the recess 4 of the friction gear 43.
It is entering 3b. Therefore, power is transmitted between the frixy and nya 43 and the frixy and nya 44 via the friction force of the spring 45. 46 to 49 are unwinding gears, and the gear 46 is disposed so as to be able to mesh with the planetary gear 41, and the fork gear 50 is also in condylar mesh, so that power can be transmitted to the fork 51.

In addition, the fork 51 and the fork gear 50 can transmit power even when the fork slides up and down using a key and a keyway (not shown), so the fork is retracted in the upper arrow direction in FIG. It is designed to protrude into the mother tronne chamber 1b in response to a signal to close the back cover. 2 is a film feeding roller that comes into contact with the film;
2b, and this goo IJ-2b and the intermediate gear 42
A timing belt 52 is placed between the pulley 42a and the power is transmitted. 30 is a sprocket,
It is also rotatably supported by the main body 1, and an ie cell plate 53 is fixed to the upper part thereof. A conductive pattern 53a is formed on this pulse plate 53. 54 is a feed switch, and two independent contact pieces 541 and 54b are connected to the above-mentioned 2
Since it is in slidable contact with the surface of the loop plate 53, when the sprocket 30 rotates due to the movement of the film, the feed switch 54 can detect the amount of film fed.

Next, the operating method and operation of each part of the camera of this embodiment having the structure as described above will be explained.

First fJ! J6 Open the back cover 19 and load the cartridge P into the noctrone chamber a. At this time, the film leader part F is provided between the rear cover 3 and the back cover 19 as shown in FIG. 1, and the next film inlet 6 also protrudes to the outside of the camera.

When the back cover 19 is closed, a locking mechanism (not shown) closes the back cover 1.
9 is locked. The back cover close signal is detected by a back cover switch (not shown). Also, the contact piece 5a of the film detection switch 5
and 5b are separated by the film F, so the film detection switch 5 is turned off. These two switch signals are transmitted to a control circuit (not shown), so that the motor 9 rotates in the reverse direction.

In FIG. 7, when the motor 9 rotates in the reverse direction, the pinion gear 34 passes through the reduction gears 35 to 37 (the sun gear 38 rotates clockwise. Accordingly, the planet lever 39 and the planet gear 41 also rotate clockwise). The planet gear 41 meshes with the rewind gear 46. Therefore, 90 rotations of the motor are transmitted to the fork 51 by the rewind gears 46 to 49 and the fork gear 50.

When the back cover 19 is closed, the fork 51 projects into the cartridge chamber la and engages with the cartridge P, and the film leader part F is rewound. At this time, since the planetary gear 41 is separated from the intermediate gear 42, the spool 8 and film feeding roller 2 are free. Film leader part F
The end of empty winding is detected by the film detection switch 5.

When the idle winding end signal is transmitted to a control circuit (not shown), the motor 9 switches to normal rotation.

In FIG. 7, the sun gear 38 rotates as before, but this time in a counterclockwise direction, and the planetary gear 41 meshes with the intermediate gear 42 to rotate it.

Therefore, the upper 7-reaction gear 43 rotates, and the lower friction gear 44 also rotates via the spring 45.
The spool 8 also rotates in the film lid removal direction.

In addition, since the pulley 42m at the top of the intermediate gear 42 also rotates, the data IJ-2b is transferred via the timing belt 52.
rotates, and accordingly, the film feeding roller 2 rotates, driving the film leader portion F between it and the first gastric lid roller 23 and feeding it to the spool chamber lb side.

At this time, as shown in Figure 3, the tip shoulder F of the film leader part F
2 (see FIG. 4) falls into the aperture 9-cha lc of the main body 1. However, there is a film guide plate 58 inside the aperture lc.
is arranged with a certain inclination in the direction opposite to the direction of film travel, so the shoulder F2 is aligned with the aperture 1 beyond a certain level.
Therefore, the film leader part F is returned to the top side of the aperture. At this time, even if part of the film leader up to the shoulder F3 falls into the aperture lc, the film guide plate 58 is disposed in a crooked manner over the entire surface, so that part of the film leader does not fall into the aperture lc.
It does not get caught inside c and returns to the original top surface of the aperture. Film leader part F is further spool chamber lb
Proceeding to the side, Sugerocket 30 and film par 7
Olesi and n engage automatically. In addition, the shoulder portion F of a part of the film leader releases the projection 61b of the release lever 61.
In order to push it into the 9-cha lc, the release lever 61 is
In the figure, the film guide plate 58 is rotated clockwise about the shaft 60, and the pin 61m at the tip of the release lever 61 pushes the film guide plate 58 into the aperture 1c. As a result, the protrusion 61b retreats forward from the film running path, and the film leader part F is moved into the susol chamber as shown in FIG.
b, and a partial tip of the film leader is guided to the spool 8. In this case, the film guide plate 58
As shown in Fig. 5, the camera is in a position that does not obstruct the photographing optical path.

When the film leader part F enters the spool chamber 1b, it is guided by the back cover roller 14 and the main body roller 12 and wound around the spool 8. In this case, the film winding speed of the spool 8 is set to 5R so that it is faster than the film feeding speed of the feeding roller 2, so the film is wound up in the spool chamber 1b without slack, and the speed difference is It is absorbed by the slip ring 45 sliding between the 43, the frikshi, and the ngya 44.

While winding is performed in this manner, the sprocket 30 and the quarter pass plate 53 are rotated in accordance with the movement of the film, so that the feed switch 54 changes the amount of film fed.
When the detected amount reaches a feeding amount equivalent to one frame, the motor 9 stops. Photography is performed via the lens group of the front plate unit 31, and when a predetermined number of images is reached, the images are automatically sent back using a known method. When 9 is reversed and the planetary gear 41 and the rewind gear 46 are engaged, the 7 oak 51 is rotated from K. When the rewinding is completed, the motor 9 is moved by a known method.
stops and rewinding ends. [Effects of the Invention] As explained in the above embodiments, in the camera of the present invention, it is possible to guide a part of the film leader into the spool chamber so that it is not restricted in the aperture. Since it is equipped with a partially guided film leader mechanism with a new structure, it is possible to completely automatically feed the film, and there is no need to position the part of the film leader on the spool when loading film. Therefore, it is possible to realize an easy-to-load film camera that allows film loading to be carried out much easier than in conventional cameras.

In addition, although the above embodiment shows only the case where the present invention is applied to a camera of a simple film loading type, the film leader partial guide mechanism shown in this embodiment can also be applied to other types of cameras other than the above embodiment. Of course it is.

1+. In the above embodiment, when the leading edge of the film reaches the susol chamber, the release lever 61 moves the film guide plate 58 a! - Although the film is configured to be displaced into the chamber, the leading edge of the film is detected by a detection means such as a photointerrupter instead of the release lever 61, and the shaft 57 of the film guide plate 58 is rotated by a motor or the like. Is the information board 58 a? - It may be configured to be displaced into the chamber. In this case, the interlocking means will be composed of a photointerrupter and a motor responsive to the photointerrupter.

[Brief explanation of drawings]

FIG. 1 is a horizontal cross-sectional view of a camera according to an embodiment of the present invention when film is loaded, FIG. 2 is a perspective view of the rear side of the camera in the state shown in FIG. horizontal sectional view showing the automatic feeding state of the section;
FIG. 4 is a schematic diagram of the camera in the state shown in FIG. 3, viewed from the rear side, FIG. 5 is a horizontal cross-sectional view of the camera in which a part of the film leader has reached the spool, and FIG. 6 is a schematic diagram of the camera in the state shown in FIG. FIG. 7 is a rear perspective view with the back cover open and before the cartridge is loaded, and FIG. 7 is a perspective view showing the power transmission mechanism for film feeding in the camera. 1...Camera body. 1a...z'? ) Rhone chamber. lb...Spool room. lc...7 Noe
-f-ya. 1d... Back pivot joint. 1e... Bulkhead. 2...Film feeding roller. 3... Rear cover. 4...Front cover. 5...Film detection switch. 6...Film entrance path. 7... Light blocking material. 8...Spool. 9...Motor. 15...11! ? vinegar. 16...pressure plate. 17...Pressure plate spring. 18...Front plate unit. 19... Back lid. 21...Roller plate. 23...First back cover roller. 24...Second back cover roller. 26...ノf) 0-ne press jc-4ne. 27... Back cover opening/closing knob. 28... Back cover opening/closing lever. 29... Light blocking material. 30... Sujirocket. 58...Film guide plate (film guide member). 59...Spring. 61...Release lever (interlocking means).

Claims (1)

[Claims] A film guide member movable between a first position for guiding the leading edge of the film traveling on the aperture while crossing the photographing optical path to a spool chamber and a second position for retracting outside the photographing optical path; a biasing member that biases the film guide member to the first position; and a biasing member that biases the film guide member to the second position against the biasing member in response to traveling to a position where the leading end of the film does not enter the aperture. A camera characterized by comprising: interlocking means for displacing the camera to a certain position.