JPS62238544A - Camera - Google Patents

Abstract

PURPOSE:To obtain a camera whose waterproofness and durability are high, and also, to complete loading of a film by only closing a back cover, by providing a rear cover having an opening for exposing only a cartridge chamber, and a small-sized back cover for opening and closing the opening. CONSTITUTION:The title camera is provided with a rear cover 15 having an opening for exposing only a cartridge chamber 1a, a small back cover 19 for opening and closing the opening, a feeding roller 2 which has been placed near the cartridge chamber 1a in a position between the cartridge chamber 1a and an aperture 1c, and a film detecting switch 5 which has been provided near the aperture 1c. This camera is constituted so that a film feed can be executed automatically by closing the back cover 19 in a state that a film leader part has been held out to the outside of the camera, after a cartridge has been thrown into the cartridge chamber 1a at the time of loading the film. At the time of loading the film, the film feed can be executed automatically without executing an excision, etc., of the film leader part after the cartridge has been thrown into the camera.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a camera, and particularly to an easy-to-load film camera in which film can be easily loaded.

[Background of the invention]

In conventional cameras, the operation of loading film is quite troublesome, and in order to improve this, various proposals have been made recently for cameras with structures that allow film loading to be performed more easily than in conventional cameras. The camera disclosed in the proposal had the following drawbacks, and therefore had problems in practicality.

For example, Japanese Patent Application Laid-Open No. 55-143550 states, ``After inserting the cartridge into the camera and closing the back cover, the film leader section exposed outside the camera is removed by locking the back cover. A type of camera that can be easily used is disclosed.

In the case of cameras with this type of film loading system, it is easier to load the film than in conventional cameras because there is no need to pull out the film leader section toward the take-up spool. It is necessary to install a cutter on the back cover of the camera to remove it, which may injure your hands, creating new problems in terms of camera operability and safety, and the removed film leader may be discarded as waste. The problem arises that it pollutes the environment.

In addition, Japanese Patent Application Laid-Open No. 57-201221 describes a system that ``When the film leader part pulled out from the mother trone is long and protrudes from the spool chamber, this is detected and the film is rewound to a position where it fits in the spool chamber. However, in the case of such a camera, the entire back cover opens like in conventional cameras, so not only the cartridge chamber but also the spool chamber is exposed when loading film, making it difficult for people who are not used to loading film. The result was that the complicated mechanism inside the camera was shown to people who were not familiar with the camera, which somehow created a sense of fear.

Furthermore, since the camera has a structure in which the entire back cover can be opened like in conventional cameras, the waterproof performance is low and there are also problems in robustness.

[Object of the Invention] An object of the present invention is to provide a simple film loading type camera having a novel structure that eliminates the drawbacks of the conventionally proposed cameras as described above. More specifically, it is an object of the present invention to load a film without worrying about the length of the film exposed from the notrane and without having to cut out the film leader after loading the notrane into the camera. To provide a camera in which film is automatically fed, a spool chamber is not exposed when loading film, and the camera is highly waterproof and robust.

[Summary of the invention]

The camera of the present invention includes a rear cover having an opening that exposes only the cartridge chamber, and a small back cover that opens and closes the opening.
A feeding roller disposed closer to the cartridge chamber at a position between the cartridge chamber and the mother layer, and a film detection switch provided closer to the mother layer, The camera is characterized in that when loading a film, the film is automatically fed by closing the back cover while leaving the film leader section outside the camera after putting the cartridge into the cartridge chamber. It is.

[Embodiments of the invention]

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

FIG. 1 is a horizontal sectional view of the camera according to the first embodiment of the present invention, and FIG. 2 is a perspective view showing the camera of FIG. 1 with the back cover opened and the cartridge not yet inserted.
Fig. 3 is a perspective view of the back cover closed after the mother trone has been inserted, Fig. 4 is a perspective view of the back cover opening/closing lever, and Fig. 5 is a perspective view of the film feeding mechanism in the camera of the present invention. Figure.

In Fig. 1, 1 is the main body of the camera 2;
are cartridge chamber 1a, spool chamber 1b, aperture l
cs aperture glass receiving part 1d.

It has a feeding roller receiving part 1e and a hinge part 1f.

Reference numeral 2 denotes a feeding roller, and the feeding roller 2 is rotatably supported by the camera body 1 through a shaft 2a, and its surface is covered with a soft material such as rubber. Further, a pulley 2b is integrally fixed to the upper part of the shaft 2& (see FIG. 5).

Reference numeral 5 denotes a detection switch for detecting a state as shown in FIG. 1 in which the film F is exposed outside the camera. The detection switch 5 has one contact piece 5a connected to the film F as shown in FIG.
When the film F is not pushed by the camera (that is, when the film F has not come out of the camera as shown in Fig. 1), it is ON, and the contact piece 5a and the contact piece 5b are in contact with each other. . Reference numeral 7 denotes an aperture glass plate, which covers the entire surface of the hole of the aperture IC in the camera body 1, and the aperture glass receiving portion 1 of the camera body 1.
It is fixed at d. 8 is a spool, and spool 8
The outer periphery is covered with rubber, allowing the film to be rolled up. 9 is a motor, and the motor 9 is housed within the spool 8. 10 is a main body roller plate, and the main body roller plate 10 is rotatably supported by the camera body 1,
A rotatable roller 12 is pressed against the spool 8 by a spring 11. Reference numeral 13 denotes a back cover roller plate. The back cover roller plate 13 is formed of a thin plate spring, and is fixed to the rear cover 15 so that a rotatable roller 14 at the tip is in contact with the spool 8 due to its own spring property. There is. The rear cover 15 has an opening that exposes only the cartridge chamber 1a, and a tapered film entrance surface 15m is formed in the first class portion of the opening.

Also, the Q/4-surface 1 of the back cover 19 facing the surface 15 &
There is a film entrance 1 between 9m and the tapered surface 15m.
8 is formed, and the film F exposed outside the camera is drawn into the camera through the film entrance 18 when the film is loaded.

A pressure plate 16 is disposed directly opposite the glass plate 7 that defines the hole of the aperture 1c, and a pressure plate spring 17 that biases the pressure plate 16 toward the glass plate 7 is attached to the rear cover 15. There is.

The back cover 19 is pivotally attached to a shaft 20 at a main body hinge part 1f of the camera body 1 at a back cover hinge part 19b.

The roller plate 21 carrying the back cover feeding row 223 is rotatably supported on the back cover 19 by a shaft 21&, and a force is applied to one end 21b of the roller plate 21 by a spring 22, so that the shaft 21
It is biased clockwise around m. Therefore, the back cover feeding roller 23 rotatably supported on the roller plate 21 moves the film F while pinching the film Ft between it and the opposing feeding roller 2.

Incidentally, 21c is the position/base of the roller plate 21 when the back cover 19 is opened. 24 is a second back cover roller, and this second back cover roller 24 is attached to the holder 2 fixed to the back cover 19.
5 is rotatably supported. Reference numeral 26 denotes a cartridge holding spring, which is fixed to the back cover 19 and prevents the cartridge P from floating or rising due to its elastic force.

27 is a back cover opening/closing knob, which is a back cover opening/closing lever 2 which will be described later.
It is fixed to 8. 29 and 6 are light shielding materials, and 30 is a sprocket. 31 is a front plate unit having a photographic lens, and the front plate unit 31 is fixed to the camera body 1 at a location not shown.

32 is a front cover, and a protective glass 33 is fixed to the front cover 32 on the front surface of the photographing lens.

Further, in FIG. 3, 55 is a finder eyepiece, and 56 is a release button.

FIG. 4 is a perspective view of the back cover opening/closing lever 28 attached to the back surface of the back cover 19. As shown in the figure, the back cover opening/closing lever 28 to which the back cover opening/closing knob 27 is fixed is provided with two long lengths 61 and 62, which are attached to the back cover 19 by stepped screws 63 and 64, respectively. It is attached so as to be slidable in the longitudinal direction and is urged leftward by a return spring 65. 60 is a locking pin provided on the camera body side that connects to the hook portion 28m of the back cover opening/closing lever 28.
By engaging with this, the back cover 19 is held in a closed state. To open the back cover 19, use the back cover opening/closing knob 27.
By operating the button to the right, the hook portion 28m and the locking pin 60 are disengaged, and the back cover 19 can be opened. FIG. 5 is a perspective view showing a gear train for raising and returning film in the camera of the present invention;
Components that are the same as those described in FIGS. 1 to 3 are designated by the same reference numerals. Also, each gear here (unless otherwise explained)
It is assumed that it is rotatably supported by a winding base plate or camera body 1 (not shown).

Reference numeral 9 denotes a motor, which is housed within the spool 8 and has a pinion gear 34 fixed to its output shaft. 35-37
is a reduction gear, which is made up of two gears, a large gear and a small gear, each of which is molded into one body, and by sequentially meshing with the pinion ear 34, the rotation of the motor is reduced and high torque is generated. 38 is a sun gear which meshes with the reduction gear 37 and is connected to the shaft 4 together with the planetary lever 39.
It is pivoted at 0. 41 is a planetary gear, and the sun gear 38
It is rotatably supported by the planetary lever 39 via a suitable friction shaft. 42 is the intermediate gear,
It is arranged so as to be able to mesh with the planetary ear 41, and a gooley 42& is fixed to the upper part. Reference numeral 43 is a flexible gear, which meshes with the intermediate gear 42 and has a collar portion 43a on the lower side, and a recess 43b is formed in a portion of the collar portion. Reference numeral 44 is a friction gear that meshes with a gear 8a formed on one spool 8. It also has a narrow diameter portion at the top, and a spring 45 is wound around the outer periphery of the narrow diameter portion, and one end 45a of this spring enters into the recess 43b of the flexible gear 43. Therefore, power is transmitted to the flexible range gear 43 and the 7-range gear 44 via the frictional force of the spring 45. 46-49
is a rewind gear, and the gear 46 is disposed so as to be able to mesh with the planetary gear 41, and is sequentially meshed with the fork gear 50, so that power can be transmitted to the fork 51.

Furthermore, the fork 51 and the fork gear 50 are capable of transmitting power even when the shift oak slides up and down using a key and keyway (not shown), so the shift oak is retracted in the upward direction of the arrow in response to a signal to close the back cover, and the back cover is closed. The signal causes it to protrude into the patrone room.

A feeding roller 2 is in contact with the film F, and has a pulley 2b on its upper part. A timing belt 52 is placed between the pulley 2b and the pulley 42m of the intermediate ear 42 to transmit power. Next, the operation of the camera and the operation of each part of the camera will be explained. First, as shown in FIG. 2, open the back cover 19 and load No. 9 Torone P into the cartridge chamber la.

At this time, the film leader portion F protrudes to the outside of the camera from the film entrance 18 provided between the rear cover 15 and the back cover 19 as shown in FIGS. 1 and 3.

When the back cover 19 is closed, the hook portion 28 & shown in FIG. 4 engages with the locking pin 60, and the back cover is locked. The back cover closing signal is detected by a back cover closing detection switch (not shown). Further, since the film detection switch 5 is also pressed by the film leader section F, the film detection switch 5 opens, and the motor 9 rotates in the reverse direction by transmitting these two switch signals to a control circuit (not shown). In FIG. 5, when the motor rotates in the reverse direction, the pinion gear 34 and the reduction gear 3
The sun gear 38 rotates clockwise via gears 5 to 37.

Accordingly, the planetary lever 39 and the freewheeling gear 41 also rotate clockwise in unison, and the planetary gear 41 rotates through the rewind ear 46.
meshes with Therefore, the rotation of the motor is controlled by the rewind gear 46~
49 and the fork gear 50 to the shifting fork 51.

When the back cover is closed, the fork protrudes into the cartridge chamber la and engages with the cartridge cartridge P, so that the film leader section F is rewound. At this time, since the planetary gear 41 is separated from the intermediate ear 42, the spool 8 and the feeding roller 2
is now free.

The end of winding of the film leader section F is detected by turning on the film detection switch 5. Therefore, a control circuit (not shown) switches the motor 9 to normal rotation.

Therefore, the sun gear 38 rotates, but since the rotation of the sun gear 38 is counterclockwise, the planetary lever 39 is also rotated counterclockwise, and the planetary gear 41 meshes with the intermediate gear 42, so that the intermediate ear 42 is rotated counterclockwise in FIG. Therefore, the 7-reaction gear 43 rotates clockwise, and the Sugering 45f! : Through this, the flexible gear 44 also rotates clockwise, and the spool 8 rotates counterclockwise, that is, in the film winding direction.

In addition, since the pulley 42a located on the upper part of the intermediate gear 42 also rotates counterclockwise, the timing belt 52 causes the pulley 42a to rotate counterclockwise. J-2b is rotated counterclockwise, and Goo 1)-2b
The feed roller 2 integrated with the back cover feed roller 23 also feeds the film leader section F to the spool chamber side in conjunction with the back cover feed roller 23.

Since the aperture surface is covered with the glass plate 7, the film passes through the gap between the pressure plate 16 and the glass plate 7, and at this time,
The sprocket 30 and the par 7 oreshi cylinder in the film leader section F are automatically engaged. When the film leader section 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.

Furthermore, since the film winding speed of the spool 8 is set faster than the film feeding speed of the feeding roller 2, the film is wound up without slack in the spool chamber 1b, and the difference in speed is determined by the friction gear 43 and the 7th traction gear. It is absorbed by the spring 45 sliding between it and 44.

When the film is wound in this way, the amount of film movement is detected as a pulse signal by the feed switch 54, which is in contact with the pulse plate 53 that rotates together with the sprocket 3o. The signal is input to a control circuit (not shown). The control circuit stops the motor 9 when the reading pulse signal reaches the number of pulses representing the feed amount equivalent to one frame. Photographing is performed through the lens of the front plate 31. When the number of shots reaches a predetermined number, rewinding is automatically performed by a signal from a control circuit (not shown), but the operations of each part during this rewinding are the same as in the case of rewinding the film leader section described above. Then, the motor 9 rotates in reverse, and the planetary gear 41 meshes with the rewinding ear 46, thereby rotating the fork. When the rewinding is completed, the motor 9 is stopped by a control circuit (not shown).

FIG. 6 shows another embodiment of the present invention.

In FIG. 6, the same parts as those shown in FIG. 1 are designated by the same reference numerals as in FIG. 1, so a description of these same parts will be omitted.

In the embodiment of FIG. 6, the film detection switch 5 of FIG.
Instead, a response button 4 having a hemispherical head is provided at a position facing the second back cover row 224, and a switch 3 that is opened and closed by the tail portion 4a of the response methane 4 is provided. That is, in this embodiment, the film detection switch is provided at a position facing the second spine tt0-224. Therefore, since the film detection switch 3 is not exposed when the back cover 19 is opened, there is no risk of damage to the switch 3, and the operability and durability of the camera of the present invention are further improved.

〔Effect of the invention〕

As explained above, the camera of the present invention has a rear cover that has an opening that exposes only the cartridge chamber, and a small back cover that opens and closes the opening, so that it is waterproof and robust. Moreover, when loading film, the film loading can be completed by simply putting the cartridge into the main cartridge chamber and closing the back cover, without having to worry about the length of the film leader section exposed from the cartridge. Therefore, it has the advantage of being extremely easy to operate.

[Brief explanation of drawings]

FIG. 1 is a horizontal sectional view of one embodiment of the camera of the present invention, and FIG.
The figure is a perspective view of the camera in Figure 1 with the back cover open, and Figure 3 is a perspective view of the camera with the back cover open.
The figure is a perspective view of the camera 2 shown in Figure 1 when the mother trone is loaded and the back cover is closed. Figure 4 is an exploded perspective view of the back cover opening/closing lever attached to the back cover. Figure 5 is an exploded perspective view of the back cover lever attached to the back cover. A perspective view of the film winding and rewinding mechanism built into the camera of FIG.
FIG. 6 is a horizontal sectional view of another embodiment of the present invention taken along the same section as FIG. 1. 1...Camera body 1a.../4 Torone chamber lb...Spool chamber 1c...7/4'-1 Ya 2...Feeding roller 3...Switch 4...
Response button 5...Film detection switch 6.
...Light shielding material 7...Archer glass plate 8...Spool 9...Motor 10
...Body roller plate 15...Rear cover 16...
・Pressure plate 17...Pressure plate spring 18...Film entrance 19...Back cover 21...Lever
23...First spine roller 24...Second back cover roller 26...Patrone presser spring Q'f,... 4
H main P-Q HB** 10 O-, -8 palm P”l Akira 1/ -z-29...shading material 3o...sprocket 32...front cover 33...safety is last Kishida Right direction, 7

Claims (1)

[Claims] It has a rear cover with an opening that exposes only the cartridge chamber, and a back cover that opens and closes the opening, and when loading film, the film leader remains outside the camera. In a camera configured to automatically feed film by closing the cartridge, a feeding roller is provided at a position between the cartridge chamber and the aperture near the cartridge chamber, and a feeding roller is provided between the cartridge chamber and the aperture. A camera characterized in that a film detection switch is provided at a position to detect the presence or absence of film.