JPS6091337A - Mode switching device of preliminary winding type camera - Google Patents

Abstract

PURPOSE:To prevent the multiple exposure of a film which is already exposed if the rear cover of a preliminary winding type camera is opened during film loading operation by providing the rear cover and a switch for detecting the loaded state of a cartridge, and controlling a motor. CONSTITUTION:The motor is normally powdered on forward and backward through a relay switch RLS and a mode changeover switch 400 to perform preliminary winding operation and photographing operation over rewinding operation. If the rear cover is opened in the middle of the photographing operation, the rear cover is closed once more as it is; and then a mechanical switching means is not operated because neither the unloading of the film nor the loading of a new film which is expected is performed, so a cartridge switch ST is held on. Consequently, the film is not all rewound into the cartridge after preliminary winding and the exposed film is prevented from being exposed again.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to storing film in a film container (
In so-called pre-winding type cameras, the camera continuously winds the film from the beginning (hereinafter referred to as ``cutrone'') and then takes pictures while rewinding it frame by frame. , photography mode) switching device.

Conventional pre-winding cameras require a mechanism to switch from the pre-winding mode to the shooting mode, but if this mechanism is configured to operate automatically, a means for accumulating energy, that is, a means for charging, is required. A system has been proposed in which this charging is done manually, but this can lead to people forgetting to charge the battery and missing the photo opportunity, or opening the back cover and wasting film because they mistake the camera's inoperability due to forgetting to charge the battery. There were problems such as causing the problem to occur.

Another conventional charging method has been proposed that charges using a member that is linked to the opening and closing of the camera back, but this means that if you accidentally open the camera back in shooting mode, the mode will change, and if you close the camera camera, the camera will charge. There were problems such as the possibility of winding the film again and exposing the film that had already been photographed.

On the other hand, in order to avoid mode switching due to accidental opening of the back cover in this shooting mode, only when film is loaded,
That is, a mode switching device has been proposed in which the mode switching device is configured to operate only when the cartridge detecting means in contact with the cartridge detects the presence of the cartridge. However, in this mode switching device, there is a problem in that the cutroi is always abutted by the flat tronne abutment means, which has an adverse effect on maintaining the correct orientation of the film.

OBJECTS OF THE INVENTION The present invention has been made in view of the above-mentioned problems regarding the charging of the mode switching means of a pre-winding type camera, and is a mode switching device that is operated by a member that is linked to opening and closing of the back cover of the charging of the mode switching means, Even if you accidentally open the back cover while loading the film, when you close the back cover again, it will switch to the P winding mode and wind it on the film last fool, then wind it on the film la, f) O-ne, and the picture will be taken. An object of the present invention is to provide a mode switching device capable of protecting the film of the present invention.

Another object of the present invention is to provide a mode switching device that does not have any adverse effect on the orientation of the loaded gastrone or film.

Structure of the Invention In order to achieve the above object, the present invention has the following structure. That is, in the present invention, the mode switching member is charged by the R pattern on the back cover, and the mode switching member is locked by the mode locking member, so that the mode switching switch can be set in 1,100 seconds. 'ii
Set to f winding mode, and after normal fto0=$load%, wind up the film continuously before shooting, and lock the mode locking member at the end of preliminary winding. by releasing the mode switching member, the mode switching switch is set to shooting mode, and /
Komazu i4) It is a type of mode switching mechanism for a pre-winding camera that allows you to take pictures while rewinding the Lorone.Its features are that it is turned on by opening the back cover, and it is turned on by opening the camera back. Is it a series circuit of the Rilone switch S that turns OFF and the film detection switch S that turns ON when it detects that there is a film in the film travel path? , is connected in parallel with the above /piece switch.

Example Embodiments of the present invention will be described below based on the drawings.

This embodiment was adopted in a camera that automatically sends the leading edge of the film coming out of the Norirone to the susol and starts preliminary winding when the mother Torone is loaded into the e-trone chamber. A film drive system for prewinding and spring rewinding, a frame feeding system, a reroll detection system, a mode changeover switch unit for switching between the prewinding mode and the shooting mode r for rewinding, and an electric circuit that limits these means. [Film drive system] As shown in FIG. The film drive system also includes an integral torque-sensing lever 12 and an arm member 18 coaxially journalled to the first sun gear 16 , including a staggered output gear 6 and a reduction gear train 8 meshing with the output gear 6 . The torque detection lever 12 has a first gear that meshes with the first thick gear 14.
A first arm portion 15 that pivotally supports the planetary gear 11, a biasing arm portion 24 that is engaged with a coil spring 26 to bias the torque detection lever 12 in the counterclockwise direction in FIG. It has an operating arm 17 that engages with a mode lock lever 312. The arm member 18 pivotally supports a first planetary gear 20, and the first planetary gear 11 meshes with a drive gear 22 of the spool 1 in the pre-winding mode shown in FIG.

In the above configuration, the drive motor 2 rotates counterclockwise in FIG. 1 to perform preliminary winding of the film. When the preliminary winding is completed, that is, the film 34 is
When no more is fed out from the block 2, the rotation of the block 1 stops. As a result, the first planetary gear 11 moves clockwise in FIG. 1, the torque detection lever 12 also rotates in the same direction, and the first planetary gear 11 and the drive gear of the spool l disengage. skin! When the takeoff gear 20 moves to the position shown by the imaginary line 20' in FIG. 1, and then the photographing mode is started under the control of the electric circuit, the drive motor 2 rotates in the opposite direction to that in the pre-winding mode. . The film rewinding machine GW, which operates in the shooting mode, receives the driving force from the reduction tooth 1 (row 8), the skin/planet gear 11, the drive l and the second sun gear 14, 16 and the position shown in phantom line 20'. The signal is configured to be transmitted to the transmission gear train 30 via the gear 20.

Furthermore, the last gear 36 of the transmission gear train 30 meshes with a 9-Trone drive gear 40 for rotating the winding shaft 38 of the i4-Trone 32. In addition, the transmission gear train 30
One of the 144 wheels 42 meshes with a counter drive gear 44 for driving the film counter thread.

On the other hand, a film feeding device 50 is provided below the spool 1 and the film 34 to feed the leading end of the film 34 to the spool 1 in the initial stage of the F winding mode. The film feeding device 50 includes a gear 52 attached to the lower end of the spool 1, an idle gear 54 that meshes with the gear 52, a one-way gear device 56 that meshes with the idle gear 54, and an output gear 58 of the one-way gear device @56. and a drive belt device 62 driven by the idle gear 60.

The drive belt device 62 includes a belt 7 having a plurality of protrusions 72 that fit into the p4-foliation 70 of the film 34.
4 is configured to run in parallel with the film 34. The one-way gear device 56 includes a human-powered gear 64 and an output gear 58 coupled via a one-way clutch 66.

In the above configuration, when the cutrone 32 is loaded into the camera and the preliminary winding mode starts, the drive motor 2 and the spool 1 rotate, and at the same time the drive belt device 62 feeds the film 34 to the spool 1.

Then, when the leading end of the film 34'7) reaches the spool 1 and the spool 1 winds up the film 34 by a device (not shown), the film 34 is taken up by the spool 1 without being restricted in any way by the drive belt device 62.

[Frame feeding system]

As shown in FIG. 2, the frame feeding system includes a Sugerocket shaft 100 that is pivotally supported by a camera gear (not shown), and a sprocket 102 that is fixed to the lower end of the Sugerocket shaft 100.
and a cam member 104.

The sprocket 102 is 74-formation/
, and the cam member 104 engages a swinging arm assembly @106 that operates the feed switch S1.

The swinging arm device 106 is pivotally supported by a bin 107,
The first swinging member 110 is biased to rotate clockwise in FIG. 2 by the coil spring 108, and the first swinging member 11
A second swing member 114 is pivotally supported by a beam 105 on one of the γ-me portions of 0, and is biased to rotate counterclockwise in FIG. 2 by a coil spring 112, and a first swing member 110.
and a switch connection piece 116 pivotally supported on the other arm portion of the switch.

In the above configuration, in the preliminary winding mode in which the sedge rocket 102 rotates counterclockwise in FIG. The member 110 does not swing, and the switch connection piece 116 keeps the idle feed switch S1 ON. On the other hand, when the shooting mode is entered and the cam member 104 rotates clockwise in FIG.
The swinging member 110 is moved to the position shown in FIG. 2, and the idle feed switch S1 is turned off.

On the other hand, a four part 120 is provided in the middle part of the Sugerocket shaft 100, and a / piece switch S is provided here. operating arm 122 of
The protrusions 124 of the two engage with each other. The operating arm 122 has one end pivotally supported by a camera body (not shown), and has a coil spring 1
26 to rotate counterclockwise in FIG. When the Sugerocket shaft 100 is in a rotational position where its recess 120 and the protrusion 124 of the operating arm 122 engage, the operating arm turns the / piece switch So OFF, and when it is in the other Q rotational position, it turns ON.

As mentioned above, the jump feed switch S1 and the 7-frame switch So are always ON, and in the shooting mode, the /
It turns OFF when the uniform rewinding is completed, but the jump switch S1 turns QFF only when the piece switch So turns OFF.
It is configured so that it is slightly earlier than becoming FF.
There is.

On the other hand, when the 1 preliminary winding mode is completed, the Sugerocket shaft 120 is connected to the concave portion 120 and the protrusion 1 of the operating arm 122.
24 is in the rotational position where it engages, the /piece switch So is OFF, but the empty feed switch SI is ON, so tl, which will be described later, is fil! by the air circuit! At the beginning of the shadow mode, / uniform skip forwarding (rewinding) is performed. Furthermore, when the pre-winding mode is finished, if the tin rocket shaft 120 is in a rotational position where the recess 120 and the protrusion 124 of the operation '7-m 1220 do not engage, the /# switch So and Since the blank feed switch is ON, blank feeding (rewinding) is performed by an amount less than 1 in the initial stage of the tυ shadow mode.

By the way, in the laboratory, when taking out the film from the mother trone and cutting it, in order to waste a certain length of the film on the side that is fixed to the winding shaft of the cartridge, the exposure position of the first sheet is set to the above fixed position. There is a request to shift it to the opposite side. The above-mentioned free winding satisfies this requirement.

A small diameter portion 130 is provided at the upper end of the sprocket shaft 100, and the film counter drive gear 44 shown in FIG. Counter drive gear 44
and the counter tooth lft132 is 11! A friction clutch 134 is arranged.

The film counter drive gear 44 is connected to a sprocket shaft 100.
provides driving force.

[Patrone detection thread]

- The mother Torone detection system was loaded as shown in Figure 3 and Figure ≠. ? ) Near Rhone 32? It has an e-Trone lever 304 that is pivotally supported by a spring 300 and biased counterclockwise in the figure by a coil spring 302.

/ The Cutrone Leper 304 has a protrusion 306 at the lower end that comes into contact with the side wall of the Noctrone during insertion/removal, and is in the detection direction position shown in Figure 3 when inserting/removing the e-trone, and in the position shown in Fig. 3 when the insertion/removal of the E-trone is complete. It is in the non-detection direction position shown in . d When the Trone Leper 304 is in the detection direction position,
Set the Torone switch ST to QFF, and turn it ON when it is in the non-detection position.

On the other hand, the coil spring 302 of the 79 Trone lever 304
The end on the side with one inch removed is configured so that a protrusion 310 provided at the middle part of the locking lever 308 engages with it. It is now biased clockwise in FIG. 3 by the coil spring 314. When the Rohne Leper 304 moves to the detection direction position shown in FIG.

- The upper end of the nereper 304 climbs over the protrusion 310 and is C-locked by the protrusion 310.

A back cover spring member 312 fixed to the back cover (not shown) is configured to engage with the end of the pin 311 on the side where the protrusion 310 is located, and the back cover is closed when the back cover is closed. The spring member 312 overcomes the locking lever 308,
When the back cover is closed, the back cover/floating member 312 rotates the locking lever 308 in the counterclockwise direction in FIG. 3 to disengage the locking lever 308 and the Zetrone lever 304.
The cartridge lever 304 moves to the non-detection position shown in the figure.

[Mode changeover switch section]

Figures 5 to 7 are perspective views of the -/- mode switching section. Figure 5 shows the back cover closed in the pre-[1ff4 mode], and Figure 2 shows the camera back closed in the shooting mode. Indicates closed state,
Figure 7 at t' shows the camera back in shooting mode with the camera back open.

The mode t/J changeover switch section includes a mode changeover switch 400 and a pin 40, as shown in FIGS.
The mode switching lever 406 includes a substantially L-shaped mode switching lever 406 that is pivoted by a coil spring 404 and biased counterclockwise in FIG. 5 by a coil spring 404.

The mode switching lever 406 is the mode switching switch 40
The first lever part 407 that presses 0 and the [
It consists of two lever parts 409. Mode switching lever 40
6G1, i%/lever 407 is mode selector switch 4
00 is pressed to connect to the photographing mode, and the mode selector switch 400 is released to connect to the preliminary winding mode.

A protrusion 408 is provided at the tip of the first lever part 407, and a locking lever 410 is provided at the tip in the preliminary winding mode position.
The protrusion 416 is engageable.

The locking lever 410 is pivotally supported by a pin 412 and biased clockwise in FIG. is configured to do so.

A lower protrusion 426 of a charge lever 424 that is pivotally supported by a pin 420 and biased counterclockwise in FIG. Charge lever 4
A protrusion 430 of a charge slider 428 engages with an end 427 of the charge slider 24 opposite to the lower protrusion 426 . The charge slider 428 is biased toward the back cover 432 by a coil spring 440 and comes into contact with the protrusion 434 of the back cover 432 in the closed state. The sliding direction and sliding range of the charge sliding body 428 are determined by the engagement of the narrow grooves 436 and the grooves 438.

In the above configuration, when the back cover 432 is in the closed state in the preliminary winding mode, the locking lever 4
10 locks the mode switching lever 406 in the pre-winding mode position, and the mode switching switch 400 is connected to the pre-winding mode.

Next, when the preliminary winding is completed and the rotation of the gear 10 stops, as shown in FIG. rotates respectively. As a result, the locking lever 410 and the mode switching lever 406 are disengaged, and the mode switching lever 406 connects the mode switching switch 400 to the photographing mode.

When the back cover 432 is opened in the photographing mode, a back cover switch, which will be described later, is turned off and the rotation of the drive motor 2 is stopped.

On the other hand, as shown in FIG. 7, the torque detection lever rotates counterclockwise in the same figure, and the locking lever 41O simultaneously rotates clockwise. It becomes a position where it can be locked in the winding mode position. Further, the charge slider 428 slides toward the back cover 432 following the protrusion 434 of the back cover 432, thereby rotating the charge lever 424 counterclockwise in FIG. 7. As a result, the mode switching lever 406 moves to the preliminary winding mode position, and the locking lever 410 locks the moved position.

〔electric circuit〕

The electric circuit consists of a power supply E1, a back cover switch SC1 which turns OFF and ON when the back cover is opened, a drive motor 2, a relay RL and a relay switch RLS%, a film detection switch SF that detects the presence or absence of film, and a mode. Changeover switch 400, manual rewind switch SA for manually winding the film, /frame switch S01, empty winding switch S1, and cartridge switch ST
It consists of a back cover switch S01, a relay RL, a relay switch RLS, and a manual rewind switch S.
A is not shown in FIGS. 1-7.

As shown in FIG. 1, the film detection switch S is disposed near the running path of the film 34, detects the presence or absence of the film via a contact piece 500, and is turned ON when the film 34 is on the film running path. becomes.

In the above circuit, normal! When the cartridge is loaded in the open state and the camera back is closed, the mode switching lever 406
is charged, the mode changeover switch 400 is connected to the preliminary winding contact R, and the camera back switch Sc is turned on.
The film detection switch S detects the presence of film and turns ON, and current flows through the normally closed contact NOS of the back cover switch S01, the relay switch RLS, the drive motor 2, the preliminary winding mode contact R of the mode changeover switch 300, and the film detection switch SF. , and pre-winding is performed.

When the preliminary winding is completed, the film stops rotating the stool 1, so the torque detection lever 12 rotates clockwise in FIG. 1, rotates the mode locking lever 412 counterclockwise, and switches the mode. Rotate the lever 406 to the shooting mode position.

Therefore, the mode changeover switch 400 is connected to the photography contact T, the relay RL connects the relay switch RLS to the normally open contact No, and the drive motor 2 rotates in the photography mode direction.

Thereafter, when the jump feed switch S1 is turned OFF and the /frame switch So is set to QFF, the drive motor 2 is stopped, the jump feed is completed, and the preparation for photographing the first image is completed. After that, /piece switch S.

The same amount of film is fed for each shot.

If you accidentally open the camera back during shooting mode,
The charge lever 424 moves the mode switching lever 40G to the pre-α1f winding mode position, the locking lever 406 locks the pre-winding mode position, and the mode switching switch 400 connects to the 100111-winding mode connection R. When the back cover is closed, the cartridge switch S1- and the film detection switch SF are kept ON, and the back cover switch SC is turned ON.
o is disabled and preliminary winding is performed. Then, when the winding is completed, the drive motor 2 is connected to the shooting mode as described above, and the trap/relay switch sT and the film detection switch SF are kept ON, so the /
Piece switch S. is disabled, and rewinding is performed continuously. This rewinding ends when the film detection switch SF detects that there is no film on the film travel path, that is, that almost all the film has been wound onto the trone, and turns OFF.

Make sure to release t1 of the camera back (When all shooting is completed, manually turn the manual rewind switch sA
Turn to N and wind up the remaining film on stool 1 onto Cutlow $32. - When the winding on the mother trone 32 is completed and the film is no longer on the film travel path, the film detection switch SF is turned OFF and the winding rotation of the mother trone 32 is stopped.

After that, the back cover is opened and the Torrone 32 is taken out. The mode switching lever 406 is moved to the pre-winding mode position by the action of the charge lever 424 linked to the opening of the back cover, and the locking lever 406 is activated to select the pre-winding mode. The position is locked and the mode changeover switch 400 is connected to the preliminary winding mode.

On the other hand, Gutronesui? ST becomes QFF by -f) rowneno insertion/removal, and preparation for preliminary winding mode is completed.

Effects of the Invention As explained above, even if the camera back is opened by mistake in the shooting mode, if the camera back is closed again, the camera enters the preliminary winding mode, winds the film onto the stool, and then winds the film into the cartridge. It is possible to provide a mode switching device that can protect a photographed film by winding it up. Furthermore, the present mode switching device has the effect of eliminating the drawback of the conventional device that it adversely affects the posture of the loaded film or film.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a 7-t lume drive system according to an actual example of the present invention;
Figure 2 is a perspective view of the piece feeding system, Figure 3 and Figure ≠? Fig. 3 is a perspective view of the cartridge detection system, Fig. 3 shows the cartridge being inserted and removed, Fig. ≠ shows the cartridge being loaded, and Figs. , FIG. S shows the f-winding mode, FIG. 6 shows the photographing mode, FIG. 7 shows the back cover open state in the photographing mode, and FIG. R is an electric circuit diagram of this embodiment. 1... Suguru, 2... Drive motor, 14.16.
...Sun gear, 12...Torque detection lever, 32...
・af) Rone, 50...Film feeder, 60・
... Drive belt, 100 ... Sprocket shaft, 304
...Zo Trone Leper, 308...Latching lever,
312...1! Lid spring member, 400...mode changeover switch, 406...mode changeover lever, 41
0...Latching lever, Sc...Back cover switch, RL・
...Relay, RLS...Relay switch, So...
/ Piece switch, SL...Jump feed switch, SF...
・Film detection switch, ST...Nosotrone switch.

Claims (1)

[Claims] By opening the back cover, the mode switching member is charged, and by locking this charger with the mode locking member, the mode switching switch is set to the pre-winding mode. When the preliminary winding is completed, the mode locking member is unlocked and the mode switching member is released to set the mode switching switch to the shooting mode, and the / piece switch is turned on. In the mode switching mechanism of a pre-winding camera, which allows the film to be taken while rewinding the film frame by frame by turning it OFF, it turns on when the camera back is opened, and turns off when the main trane is removed. A mode of a pre-winding camera characterized in that ST and a straight line A of a film detection switch S-, which is turned ON when detecting the presence of film in the film travel path, are connected in parallel with the above-mentioned l frame switch. switching device.