TW552460B - Film pre-winding mechanism for 35 mm film format still cameras - Google Patents

Abstract

A mechanism to be used in 35 mm film format still cameras, which pre-winds a roll of unexposed film entirely by motor to the unexposed film chamber provided in the camera immediately after the camera back door has been closed with the unexposed film loaded inside without using any expensive electric circuits and devices like a CPU, and of which the pre-winding setting can be changed manually by hand to the winding setting (picture taking setting) for picture taking after the pre-winding has been completed, and which can be reset to the pre-winding setting of the mechanism automatically but mechanically when the camera back door is opened again after the film has been exposed, wound back into and stored in the film cartridge.

Description

552460 玫 Rose, description of the invention (the description of the invention should state: the technical field to which the invention belongs, the prior art, the content, the embodiments and the simple description of the drawings) Background of the invention The film pre-rolling for 35 mm film cameras is a system, It can be used to roll a roll of unexposed 35 mm negative film into the camera's unexposed negative film chamber in advance, pull the negative film out of the negative film box before starting to take pictures (exposure), and roll back the negative film frame by frame after each exposure To the film box, thus protecting all exposed frames from accidental opening of the camera's back door and secondary exposure. This type of film pre-rolling system is different from the conventional top film. It requires unexposed films to be pulled out of the film box in advance, and all unexposed films are wound in the unexposed film chamber set in the camera. On the reel (or take-up drum). It is therefore necessary to add a system for winding an unexposed film on the take-up reel to the ordinary film winding mechanism. Because of the additional mechanism and expensive electrical parts for the pre-rolled control circuit, it is inevitable that the cost should be increased. Due to this increased cost, only a few very expensive 35 mm cameras today use this prerolling system for this prerolling advantage. In today's world market, these high-end 35 mm compact cameras with negative film pre-rolling system are sold, such as Fuji Super 145A, Super 120A, Super 90AZ compact 35 mm cameras from Japan's Fuji Photo Film Co., Ltd., or such as Japan's Ricoh Co ., Ltd. Ricoh GR 1, GR 10, GR 21, R1 and RIO 35 mm compact cameras. None of the above cameras actually have a film pre-rolling system. Only a few of these inexpensive single-use cameras have a manual pre-rolling mechanism, but manually winding a roll of unexposed negatives by hand onto a take-up reel is too time consuming and not suitable for practical use. Therefore, all pre-rolling systems of high-end 35 mm cameras have motorized pre-rolling systems, and they all use CPU (Central Processing Unit-Semiconductor) to control negative film pre-rolling and negative film rewinding. 552460 (2) However, it is difficult to provide such electronically controlled preroll systems at low cost. The manual control of the pre-rolling mechanism may be low cost, but the user must pre-roll the film by the handle or knob until the end of the film, which usually has a maximum of 36 sheets, and it is not suitable for practical use, unless the manufacturer does not deliver it before delivery. Pre-rolling with automated pre-rolling equipment at the factory is the same as when using a single camera. If the film can be prerolled by the motor, and if very inexpensive parts and a simple circuit can be used instead of the expensive CPU control circuit, the film can be driven back and forth mechanically. This kind of negative film pre-rolling mechanism can be quite low in cost and very suitable for practical use, and has the advantage of negative film pre-rolling, that is, protecting the exposed negative film. Object of the Invention Therefore, the object of the present invention is to provide a 35 mm negative film camera pre-rolling mechanism, which uses the mechanical control of the film pre-rolling on the rewinding shaft and the film rewinding to the film cassette without using any CPU with any Expensive electronic circuits. Summary of the Invention In order to achieve the above object, the film preroll according to the present invention includes a mechanical direction switch located on the camera body to change the rotation of the motor from the preroll direction to the rewind direction, or in a reverse manner. An actuator that is connected to the knob of the direction switch and controls the position of the knob of the direction switch. A spring that pulls the actuator so that the knob of the direction switch is always maintained in the pre-rolled position at the rear door of the camera. A part of the actuator controls a device, and a film sensing switch, which is part of the fuselage where the film is moved, and when the rear door of the camera is closed, and a film is placed on it 552460 ( 3) The pressure of the back door of the camera and the film installed is turned on to make the motor rotate. According to the present invention, when the rear door of the camera is opened, the spring immediately pulls the actuator, and the knob of the direction switch is set to the pre-rolled position, and even after the camera's rear door is closed again, the actuator and the knob of the direction switch remain in the pre-roll position. Therefore, to load an unexposed film, the rear door of the camera must be opened, and at the moment when the rear door of the camera is opened, the knob of the direction switch is set to the film pre-rolling position, and the direction switch is still in the Roll position. If the motor starts running, prepare to pre-roll the loaded negatives. The film driving circuit is designed to automatically pre-roll the film when the film is loaded into the camera and the camera rear door is closed. When the film sensor switch is pressed simultaneously with the loaded film and the closed rear door of the camera, the switch is turned on immediately and the motor starts to run immediately. And unexposed negatives will be automatically pre-rolled onto the reel inside the unexposed negatives. After the unexposed film is completely pre-rolled onto the winding shaft or the winding drum in the unexposed film room, the next time you take a picture, you should manually move the knob of the direction switch to the film winding position, and then switch the motor rotation to the film winding. Film direction, and pull the unexposed frame of the negative film out of the unexposed negative film chamber, and automatically place it in the photographing position, so that the negative film is driven to stop there. After pressing the shutter release button once, the other unexposed frame of the negative will advance to the shooting position, and the exposed negative will advance to the negative box. When the last frame of an unexposed film is exposed, all the exposed frames of the film will be rolled back to the film box and protected there. In the case of the conventional 35 mm camera, the unexposed negatives should be kept in the film box, and each frame should be advanced to the exposure of the camera after each exposure. 552460

(4) The film negative room, and after the entire roll of film has been fully exposed, the film must be rolled back into the film cassette. Therefore, all exposed frames were once stored in the exposed film compartment, which was not opaque, rather than in the exposed film box, which was not opaque. Therefore, if the camera's back door is accidentally opened, all exposed frames will be completely damaged. With the present invention, all unexposed negatives are first pre-rolled into the unexposed negative film chamber, and the unexposed negatives are drawn out of the unexposed negative film chamber one by one after each exposure, and all exposed frames are rolled back to completely unexposed. Transparent film case, so all exposed frames are protected from accidental back door opening and damage. The present invention relates to such a pre-rolling mechanism for unexposed negatives. Brief Description of the Drawings Fig. 1 is an exploded perspective view of a pre-rolling mechanism according to a preferred embodiment of the present invention in a state in which a roll of unexposed negative film is pre-rolled. Figure 1-a is an exploded perspective rear view of the camera's rear door. Figure 1-b is an exploded perspective view of the motor direction switch assembly of Figure 1 in the pre-rolled position. Figure 1-c is another exploded perspective view of the motor direction switch assembly of Figure 1 in the winding position. Figures 1-d are diagrams showing the relative positions of the actuator control claws and the actuator claws of Fig. 1. Fig. 2 is an exploded perspective view of the pre-rolling mechanism of Fig. 1 in a state where the unexposed negative film has been completely pre-rolled and the camera is ready to take a picture. Figure 2-a is a diagram showing the relative positions of the actuator control claws and the actuator claws of FIG. 2. 552460

Fig. 2-b is an exploded perspective view of the motor direction switch assembly of Fig. 2 at the winding position. Figure 2-c is another exploded perspective view of the motor direction switch assembly of Figure 2 in the pre-rolled position. Fig. 3 is an exploded perspective view of the pre-rolling mechanism of Fig. 1 in a state where the rear door of the camera has been opened and the mechanism is loaded into a new film for pre-rolling. Fig. 3-a is a diagram showing the relative positions of the actuator control claw and the actuator claw of Fig. 3. Figure 3-b is an exploded perspective view of the motor direction switch assembly of Figure 3 in the pre-rolled position. FIG. 4 is a perspective rear view of a camera having a pre-rolling mechanism according to the present invention, in which a film cassette is placed in a film chamber. Fig. 4-a is a perspective rear view of the camera having the pre-rolling mechanism of Fig. 4, with the tip of the negative film placed on the rewinding shaft of the unexposed negative film chamber. Fig. 4-b is a diagram (open position) showing the film in which the film sensor switch is loaded and the rear door of the camera being depressed. Figure 4-c is a diagram showing the film sensor switch without any pressure from the film and the rear door of the camera (closed position). Fig. 5 is a schematic circuit diagram of the first and second embodiments of the present invention in the state of Figs. FIG. 6 is a schematic circuit diagram of the first and second embodiments of the present invention. In the state of FIG. 2 and FIG. 9, the exposed frames are rolled back into the film box. Fig. 6-a is a schematic circuit diagram of the first and second embodiments of the present invention. In the state of Figs. 2 and 9, an exposed frame has been advanced to the film cassette. 552460 ⑹ Fig. 6-b shows the first and second embodiments of the present invention. In the state of Fig. 2 and Fig. 9, a schematic diagram of a circuit for depressing the shutter release switch to perform line exposure. Fig. 7 is a schematic circuit diagram of the first and second embodiments of the present invention in the states of Figs. 3 and 10; Fig. 8 is an exploded perspective view of a pre-rolling mechanism according to another preferred embodiment of the present invention in a state where a roll of unexposed negative film is pre-rolled.

Figure 8-a is a diagram showing the relative position of the actuator control claw and the actuator claw. Figure 8-b is an exploded perspective view of the motor direction switch assembly of Figure 8 in the pre-rolled position. Fig. 8-c is another exploded perspective view of the motor direction switch assembly of Fig. 8 at the winding position. FIG. 9 is an exploded perspective view of the pre-rolling mechanism of FIG. 8 when the unexposed negative film has been completely pre-rolled and the camera is ready to take a picture.

Figure 9-a is a diagram showing the relative position of the actuator control claw and the actuator claw. Fig. 9-b is an exploded perspective view of the motor direction switch assembly of Fig. 9 in the pre-rolled position. Fig. 9-c is another exploded perspective view of the motor direction switch assembly of Fig. 9 at the winding position. Fig. 10 is an exploded perspective view of the state in which the pre-rolling mechanism of Fig. 8 is opened at the rear door of the camera and the mechanism is ready to load a new film for pre-rolling. Figure 10-a is a diagram showing the relative positions of the actuator control claw and the knob of the actuator. -10- 552460

10 Figure 10-b is an exploded perspective view of the motor direction switch assembly of Figure 10 in the pre-rolled position. Figure 1 1 Direction switch 2 Camera body 3 Actuator 3-a Actuator knob

4 Direction switch 4 Ugly 5 Arm 6 Coil spring 7 Actuator control claw 8 Camera back door 9 Actuator claw Figure 1-a 7 Actuator control claw

8 Camera rear door Figure 1-b 4-a negative film pre-roll position Figure 1-c 4-b film roll position Figure 1-d 7 Actuator control claw 8 Camera back door 9 Actuator claw -11-552460 ⑻

Figure 2 1 Direction switch 2 Camera body 3 Actuator 3-a Actuator knob 4 Direction switch knob 5 Arm 6 Coil spring 7 Actuator control claw 8 Camera rear door 9 Actuator 9-a actuator Arm of the claw Figure 2-a 7 Actuator control claw 8 Camera rear door 9 Actuator claw Figure 2-b 4-b film position Figure 2-c 4-a negative film pre-roll position Figure 3 1 Direction switch 2 Camera Body 3 actuator 552460

3- a actuator knob 4 direction switch knob 5 arm 6 coil spring 7 actuator control claw 8 camera rear door 9 actuator claw Figure 3-a 7 actuator control claw 8 camera rear door 9 actuator claw Figure 3 -b 4-a Negative film pre-rolling position Figure 8 8 Camera rear door 10 Negative film sensor switch 11 Negative film 12 Rewinding shaft 13 Unexposed film chamber 14 Negative film box Fig. 4-a 8 Camera back door 11 Negative film 12 Rewinding shaft 552460

(10) 14 film box Fig. 4-b 8 Camera back door 10 Negative film sensor opening 11 Tip of negative film Fig. 4-c

10 Film sensor switch Figure 8 1 Direction switch 2 Camera body 3 Actuator 3-a Actuator knob 4 Direction switch knob 5 Arm 6 Coil spring 7 Actuator control claw

8 Camera rear door 15 basic part of actuator knob Figure 8-a 3-a actuator knob 7 actuator control claw 7-a actuator control arm 8 camera back door 15 actuator knob base -14-552460 ⑼ Figure 8-b 4-a film pre-roll position Figure 8-c 4-b film position Figure 9 1 Direction switch 2 Camera body

3 Actuator 3-a Actuator knob 4 Direction switch knob 5 Arm 6 Coil spring 7 Actuator control claw 8 Camera back door 16 Edge of the base of the actuator knob

Figure 9-a 3-a Actuator knob 7 Actuator control claw 7-a Actuator control claw arm 8 Camera back door 16 Edge of the base of the actuator knob Figure 9-b 4-a negative Pre-roll position Figure 9-c -15-552460

(12) 4-b roll position Figure 10 1 Direction switch 2 Camera body 3 Actuator 3-a Actuator knob 4 Direction switch knob

6 Coil spring 7 Actuator control claw 8 Camera back door 16 Edge of the base part of the actuator knob Figure 10-a 3-a Actuator knob 6 Coil spring 7 Actuator control claw 8 Camera rear door 16 Fig. 10-b 4-a Detailed description of the invention of the pre-rolled position of the negative film Fig. 1 shows a preferred embodiment of the present invention. The film pre-rolling mechanism includes a direction switch (1) fixed on the camera body (2) to change the direction of rotation of the motor; an actuator (3) of the direction switch (1), which is connected to -16 of the direction switch (1) -(13) 552460 I i -Pan Jing (6) for constant pull with direction switch ⑴ and actuator ⑶ ① Same as universal,-actuator control claw ⑺ is provided at the rear door of the camera as shown in Figure ⑻ Edge of the film, and a negative film sensor switch (Fig. 4 m2 :: part of the fuselage where the film is moved) and when the camera's rear door is closed and there is a film sensor switch, the camera's rear door and The pressure of the tablet is turned on to rotate the motor.

The direction switch ⑴ changes the direction of motor rotation, from film pre-roll rotation to film rotation, or in the reverse direction, but if the direction switch 设定 is set to the film pre-roll position (4.a) as shown in Figure η, the film is driven. The motor is in the direction from the pre-rolled film to the exposed film t of the camera, and pulls the unexposed film out of the film box (Fig. 4; u), and if it is set to the film position (4- b), 'Tiida rotates in the reverse direction to advance the exposed frame of the negative film back to the negative film box (14).

The dynamic (3) is provided with an actuator knob (3_a) on the camera body, and two arms (5) shaped like a fork are provided at the _ end of the actuator 并且, and the knob (4) of the direction switch 插入 is inserted in Between the two arms, and when the actuator ⑶ moves sideways, the knob (4) of the direction switch (1) moves with the movement of the actuator ⑺. As shown in Figure I-b, the coil spring (6) always twists the actuator (3) in the direction of the pre-rolled position (4-a), so the actuator (3) can also make the knob of the direction switch ⑴ (4) Move to the pre-roll position (4-a) and keep it there, unless you manually move the knob ⑷ of the actuator (3) and direction switch (1) to and lock it as shown in Figure 1- The roll position (4-b) shown in c. As shown in Figure 1-a, an actuator control hook ⑺ is provided on the edge of the camera's rear door (8). Whenever the actuator ⑶ and the knob 方向 of the direction switch ⑷ are set to the preroll position (4-a) as shown in Figure 1-17-552460 (14), the actuator controls the claw 在 to be in the claw ( 9) Front, without contacting the pawl (9) of the actuator (3), as shown in Figs. 1-d, which provides the actuation of the arm (5) provided by the two with the actuator (3) The opposite end of the actuator ⑶, so regardless of whether the camera rear door (8) is closed or opened 'and as long as the actuator (3) and the knob of the direction switch ⑴ remain in the pre-rolled position, the actuator control hook of the camera rear Η (8) ⑺ does not touch the claw (9) of the actuator (3), but the actuator (3) and the knob ⑷ of the direction switch ⑴ can be kept in the pre-rolled position (4-a). As shown in Figure 2 and Figure 2-a, after the camera rear door (8) has been closed, manually use the actuator knob (3-a) to manually turn the actuator (3) and direction switch (1). When the knob (4) is moved to the reel position (4-b) as shown in Fig. Lc, the actuator controls the claw ⑺ to keep the actuator (3) and the knob (4) of the direction switch (1) in the reel. The blade position (4-b) blocks the claw (9) of the actuator (3). As shown in Fig. 3 and Fig. 3-a, when the rear door (8) of the camera is opened, the actuator controls the pawl ⑺ to release the pawl (9) of the actuator (3), so the actuator (3) and the direction switch The knob (4-a) of (1) can be moved back to the pre-rolled position by the tension of the coil spring (6). Figure 1 also shows that the actuator ⑶ and the knob 方向 of the direction switch 保持 remain in the pre-rolled position (4-a). Even after the camera's rear door (8) is closed, it is pulled by the coil spring ⑹ and the film is taken. The state of the pre-rolled film pre-rolling mechanism. Figure 2 shows that the back door (8) has been closed and the film is loaded 'and the actuator (3) and direction switch (1) have been manually moved by hand using the actuator knob (3 ^) to the position shown in Figure 2 讣The film winding position (4-b) advances the unexposed frame of the film for photographing, and the state of the film pre-rolling mechanism in which the hook claw ⑼ of the actuator (3) has also moved in the same direction. The actuator (3) and the knob of the direction switch ⑴ 552460

(15) When moving from the pre-rolling position (4-a) to the winding position (4-b) as shown in Figure 2-c, the claw (9) of the actuator (3) also moves, using the actuator The elasticity of the arm (9-a) of the claw (9) extends over the top of the actuator control claw (7). And the actuator controls the claw (that is, the knob (4) of the actuator (3) and the direction switch (1) is maintained at the winding position (4-b) 'to block the claw of the actuator (3) (9 ), As shown in Figure 2-a. In the state of Figure 2, whenever the camera shutter is released, one of the negatives is exposed and then advanced, even if the exposed frame is advanced and rolled back to Negative film box (Figure 4-14), and advance another unexposed frame from the negative film room to the photographing position. Figure 2 shows the state of the film pre-rolling mechanism that is ready to be released but the shutter has not been released. Figure 3 shows that all the negatives have been After exposure, the camera's back door (8) is opened again to remove the exposed film from the camera, and again as shown in Figure 3-b, the tension of the spring (6) in the pre-rolled position (4-a) will actuate the actuator (3) and the knob (4) of the direction switch ⑴ are set back, and the state of the film pre-rolling mechanism. In the state of FIG. 3, the claw ⑼ of the actuator (3) is not blocked by the actuator control claw (7). And disengage the actuator to control the claw (that is, as shown in Figure 3-a, and by the tension of the coil spring (6), the actuator (3) and the direction The knob (4) of the close (1) is again pulled back to the pre-roll position (4_a) as shown in Figure 3-b. When the camera rear door (8) is closed again and a roll of negatives is loaded, the negatives are pre-rolled The state of the mechanism returns to the state of Fig. 1. Fig. 4 shows the positions of the negative film sensing switch (10), the winding shaft (12) 'unexposed negative film chamber (13)', and the negative film box (14). As explained so far, Whenever the back door (8) of the camera is opened, the knob (4) of the direction switch (1) is set to the pre-roll position (4_a), and the motor is ready to start. As a next step, load an unexposed film, 552460

(16) And as shown in Figure 4-a, place the tip (11) of the negative on the winding shaft (12) of the unexposed negative chamber (13). And then as shown in Figure 4-b, close the camera back door (8), and not expose the film and the camera back door (8)-the moment the motorized film switch (10) is depressed, the motor starts to run, Roll to the camera's unexposed negative film chamber (13). Figure 4-c shows the film sensor switch is off without any pressure from the film and the camera back door (8). Fig. 5 shows an example of a schematic circuit diagram of the first embodiment of the present invention in the state of Fig. 1, in which the knob (4) of the actuator (3) and the direction switch (1) is set to the pre-rolled position (4-a) And the unexposed film is being pre-rolled into the unexposed film chamber, and the film sensing switch (10) is turned on by the pressure generated by the loaded film and the rear door (8) of the camera. FIG. 6 shows a schematic circuit diagram of another example of the first embodiment of the present invention in the state of FIG. 2, in which the actuator (3) and the knob (4) of the direction switch (1) are set at the winding position (4-b ), And after one exposure (one shutter release), the unexposed film is pulled out of the unexposed film chamber, the exposed film is advanced to the film box (14), and the film sensing switch (10) is loaded into the film and the camera The pressure generated by the rear door (8) is switched on. A sprocket switch as shown in Fig. 6 is provided to control the sprocket, which is provided to stop the motor after the camera body 'mechanically counts the number of holes in the film and stops after one of the frames of the film has been advanced. When the film advances to the film box after the film has been exposed, the sprocket starts to rotate, mechanically engages and is driven by the moving film eyelet, and stops after one of the frames of the film has been advanced and rolled back into the film box. Rotate and the sprocket switch is mechanically closed. After the shutter-released movement is used, the sprocket switch is turned on again. So at the shutter -20- 552460

释放 Once released, the sprocket switch is on and the sprocket rotates at the same time (or the film advances into the film box). The sprocket switch is always on, and when the sprocket stops rotating, the sprocket switch is mechanically closed, and until It is closed for the next shutter release. When the shutter release button is depressed, the shutter release switch as shown in Fig. 6 is turned off. Using the movement of the shutter release button, the shutter release switch is mechanically operated, that is, if the button is depressed, the shutter release switch is off, and if the button is not depressed, the shutter release switch is on. Fig. 6-a shows a schematic diagram of a third example circuit of the first embodiment of the present invention, in a state where the exposure cassette has advanced to the film cassette and the motor has stopped, and the camera is ready for the next picture. Figure 6-b shows the first embodiment of the present invention. After pressing the shutter release button and the shutter release switch to OFF, and after the exposure has been performed, the shutter release action sets the sprocket switch back to that shown in Figure 6-b. The schematic diagram of the fourth example circuit in the state of the "on" position shown by the arrow. Fig. 7 is a schematic diagram of the fifth embodiment of the invention in the state of Fig. 3, in which the actuator (3) and the direction switch The knob (4) of (1) is in the pre-roll position (4-a) but the film sensor switch (10) is off, because the unexposed film has been fully exposed, and it is advanced and rolled back into the film box (14). And the film sensing switch (10) is completely pressure-free, or because the camera rear door (8) is fully opened, no pressure can be generated to the film sensing switch (10). Figure 8 illustrates another preferred embodiment of the present invention. Film The pre-rolling mechanism includes a direction switch (1) fixed on the camera body (2) to change the direction of rotation of the motor. The actuator (3) of the direction switch (1) is connected to the rotation of the direction switch (1) -21 -(18) -__ (18) -__ »2460 (4), a coil spring ⑹ always pulls the cylinder direction switch 在 一Actuate 5 | ⑺, the actuator controls the claw (7), such as Wendong for the rear door mi & μ «Figure 8_a is not provided on the inner wall of the rear door (8) of the camera, and a negative J switch (Figure 4 of 10) It is a part of the fuselage located at the place where the bottom is moved. And A), u Wan, hesitant, person, "Ugly when the back door of the camera is closed and the negative is placed on the exhibition sensor switch-H ........ The pressure on the back door of the camera and the mounted film is turned on to make the motor rotate. ^ Knife direction switch (1) changes the rotation of the motor. ^ ^, 疋 turn fully in the universal direction, from the pre-rolling of the film to the rotation of the film, or in a reverse direction, Λ and if the knob of the direction switch (1) ⑷ is shown in Figure 8 The setting shown in -b is set to the film pre-receiving position (4-a). The film driving motor rotates in the child direction to pre-roll the film? To roll into the unexposed film compartment of the camera, pull the unexposed film out of the film box (L_., Q i4 in Figure 4), and if it is set to the film position as shown in Figure 8-c (4 -b),, b) The motor rotates in the reverse direction to advance the exposed frame of the film back to the film box (14). The actuator (3) is provided with an actuator spinner (") on the camera body, and two arms shaped like a fork are provided at the-end of the actuator (3), and the knob (4) of the direction switch 插入 is inserted Between the two arms, and when the actuator ⑺ moves sideways, the knob (4) of the direction switch (1) moves with the movement of the actuator ⑺. The dial sheet (6) is always in the preroll position (4 -a) pulls the actuator (3), so the actuator (3) can also move the rotary switch 方向 of the direction switch 至 to the pre-rolled position (4-a) as shown in Figure 8-b, And keep it there, unless the actuator (3) and the knob 方向 of the direction switch ⑴ are manually moved to and locked at the winding position (4-b) as shown in Figure 8-c. Figure 8 As shown in -a, the actuator control hook ⑺ is provided on the inner wall of the rear door 照相机 of the camera. Whenever the actuator (3) and the knob of the direction switch ⑴ are shown in Figure 8 -22- 552460

When set as shown in the pre-rolled position (4-a), the actuator control claw (7) is left on the base part (15) of the actuator screw 4a (3-a) as shown in Fig. 8-a. And does not block the movement of the actuator (3) in the direction of the pre-rolled position (4-a). Therefore, regardless of whether the camera rear door (8) is closed or opened, and as long as the knob (4) of the actuator (3) and the direction switch (1) remains in the pre-rolled position, the actuator control hook (7) of the camera rear door (8) And the knob (4) of the direction switch (1) can be kept in the pre-rolling position (4-a). After the camera's back door (8) is closed, manually use the actuator knob (3-a) to manually move the actuator (3) and the knob (4) of the direction switch (1) to as shown in Figure 8-c. When the winding position (4-b) is shown, the actuator control hook (7) keeps the actuator (3) and the knob (4) of the direction switch (1) at the winding position (4-b). As shown in Fig. 9 and Fig. 9-a, the edge (16) of the base part (15) of the actuator knob (3-a) is blocked. As shown in FIGS. 10 and 10-a, when the camera rear door (8) is opened, the actuator control pawl (7) releases the edge (16) of the base portion (15) of the actuator (3-a). Therefore, the actuator (3) and the knob (4) of the direction switch (1) can be moved back to the pre-rolled position by the tension of the coil spring (6). Figure 8 also shows that the knob (4) of the actuator (3) and the direction switch (1) remains in the pre-rolled position (4-a). Even after the camera rear door (8) is closed, it is also coiled (6 ) The state of the film pre-rolling mechanism being pulled and pre-rolled. Figure 9 shows that the knob (4) of the actuator (3) and the direction switch (1) has been manually moved to the winding position (4) as shown in Figure 9-c by using the actuator knob (3-a) by hand. -b), the state of the film pre-rolling mechanism of the second embodiment of the present invention that advances the unexposed daylight of the film for photographing. On the actuator (3) and the direction switch (1), turn the 23-552460 (20) button (4) from the pre-roll position (4-a) shown in Figure 9-b to the roll position (4 -b), the edge (16) of the base part (15) of the actuator (3-a) also moves in the same direction, and slides out from the side after the actuator control claw (7), and then actuates The control claw (7) of the actuator moves downward due to the elasticity of its own arm (7-a) to block the basic part of the actuator (3-a) as shown in Fig. 9-a ( 15) of the edge (16). Therefore, the actuator controls the downward movement of the claw and blocks the edge (16) of the base portion (15) of the actuator (3-a), causing the actuator (3-a) and the knob of the direction switch (1) (4) It can be left in the winding position and blocked by the actuator control claw (7). In the state of FIG. 9, whenever the shutter of the camera is released, one of the negative frames is exposed and then advanced, and even if the exposed frame is advanced, it is rolled back to the negative box (FIG. 4-14), and Advance another unexposed frame from the film room to the photographing position. Figure 9 shows the state of the film pre-rolling mechanism which is ready to be released but has not yet released the shutter. Figure 10 shows that after the film has been fully exposed, the camera's rear door (8) is opened again to remove the exposed film from the camera, and again as shown in Figure 10-b, in the pre-rolled position (4-a) by the spring (6 The state of the film pre-rolling mechanism of the second embodiment of the present invention in which the actuator (3) and the knob (4) of the direction switch (1) are set back. In the state of FIG. 10, the edge (16) of the base part (15) of the actuator (3-a) is not blocked by the actuator control claw (7), and is released from the actuator control claw (7), such as As shown in Figure 10-a, and by the tension of the coil spring (6), the knob (4) of the actuator (3) and the direction switch (1) is again shown in Figure 10-b, and has been pulled back to Preroll position (4-a). When the camera rear door (8) is closed again and a roll of negative film is loaded, the state of the negative film pre-rolling mechanism returns to the state of FIG. 552460

(21) In the same manner as described in detail with reference to Fig. 4, Fig. 4a, Fig. 4b, and Fig. 4c for the first embodiment of the present invention, reference may be made to this drawing for a detailed description of the second embodiment. Fig. 5 also shows an example of a schematic circuit diagram of the second embodiment of the present invention in the state of Fig. 8, in which the knob (4) of the actuator (3) and the direction switch (1) is set to the preroll position (4-a ), And the unexposed film is pre-rolled into the unexposed film chamber, and the film sensing switch (10) is turned on by the pressure generated by the loaded film and the rear door (8) of the camera. Fig. 6 also shows a schematic diagram of another example circuit in the state of Fig. 9 in which the knob (4) of the actuator (3) and the direction switch (1) is in the winding position (4- b), and after one exposure (one shutter release), the unexposed film is pulled out of the unexposed film chamber and advanced to the photographing position, and the exposed film is advanced to the film box (14), and the film sensing switch (10 ) The pressure generated by the loaded film and camera back door (8) is turned on. A sprocket switch as shown in FIG. 6 is provided to control the sprocket, which is provided to mechanically count the number of holes in the negative on the camera body and stop the motor after one of the frames of the negative has been advanced. When the film is advanced to the film box after the film has been exposed, the sprocket begins to rotate mechanically to engage and be driven by the moving film eyelet, and after one of the frames of the film has been advanced and rolled back into the film box, it stops rotating mechanically. And the sprocket switch is mechanically closed. The sprocket switch is turned on again after the shutter is released using the shutter release movement. Therefore, once the shutter is released, the sprocket switch is turned on and the sprocket rotates (or the film advances into the film box). The sprocket switch is always on, and when the sprocket stops rotating, the sprocket switch is mechanically closed. And until the next shutter release is closed -25- 552460 (22) __Miscellaneous closed. When the shutter-release button is pressed, the shutter-release switch is turned off. Using the movement of the shutter release button, the shutter release switch is operated mechanically, that is, if the button is depressed, the shutter release switch is off, and if the button is not depressed, the shutter release switch is on. Fig. 6-a also shows a schematic diagram of a third circuit of a second embodiment of the present invention, in a state where an exposed frame has been advanced into the film cassette and the motor has stopped operating, and the camera is ready for the next picture. Figure 6-b also shows the second embodiment of the present invention. After pressing the shutter release button and the shutter release switch to OFF, and after the exposure has been performed, the shutter release action sets the sprocket switch back to the position shown in Figure 6 -b. The schematic diagram of the fourth example of the state of the `` open π position '' shown by the middle arrow. FIG. 7 also shows a schematic diagram of a fifth example circuit of the second embodiment of the present invention in the state of FIG. 10, in which the knob (4) of the actuator (3) and the direction switch (1) is in the pre-rolled position (4- a) But the film sensor switch (10) is off because the unexposed film is fully exposed, and it is advanced and rolled back into the film box (14), and there is no pressure on the film sensor switch (10), or because of the camera The back door (8) is fully opened, so no pressure can be generated to the film sensing switch (10). • 26-

Claims (1)

552460 Patent application scope 1. A film pre-rolling mechanism for a 135-width negative (35 mm negative) camera. After the camera's back door is closed and unexposed negatives are loaded, it starts to use a motor to roll a roll of unexposed negatives. Pre-roll to an unexposed film room provided in the camera, and its pre-roll setting can be manually changed to the film setting (photograph setting) for photography after the pre-roll setting is completely completed, and the film has been exposed, After being rolled back and stored in the film box, when the camera's back door is opened, it can be automatically reset to the pre-roll setting of the mechanism, which includes: (a) — a switch that changes the direction of motor rotation; (b) — an actuator , Which is provided with the switch, and changes the position of the switch along with its movement; (c) a spring, which generates spring tension to the actuator, so the actuator is always pulled towards the switch and the pre-rolled position of the actuator; ( d) — Actuator control device, which provides the rear door of the camera and controls the actuator to lock the switch and the actuator to the film winding position when the camera takes a picture, and open the rear door of the camera Return the switch and actuator to the pre-rolled position at any time; and (e)-a sensor switch for loading the film, which is provided at a position inside the camera body, where the switch can be loaded into the film and closed The camera back door is pressed and turned on to make the motor run, and sense the pressure of the loaded film and the closed camera back door.