JPS62165636A - Camera - Google Patents

Abstract

PURPOSE:To facilitate the loading of a film and to rewind a film by providing a cartridge rotary driving mechanism which rotates a film cartridge in a cartridge chamber in such a direction that the film is loosened. CONSTITUTION:The film cartridge is rotated by the cartridge rotary driving mechanism PM in the loosening direction of the film F wherever the leader of the film which is led out of the film cartridge P is about the cartridge shaft Px in the cartridge chamber 6, and the leader of the film is guided on the guide surface 6A of the cartridge chamber through the rotation and inserted into a film sending-out slit to a manually operated film winding mechanism, automatic film winding device, etc. Consequently, the film cartridge is only stored in the cartridge chamber, so the film is easily loaded and the film cartridge is inhibited fro rotating, so that the film is rewound without any hindrance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a camera. More specifically, the present invention relates to an improvement in a technique for loading a camera with a film contained in a film cartridge.

[Conventional technology]

In conventional cameras, the cartridge chamber merely has the function of storing a film cartridge.

That is, when loading a film, for example, first, the back cover is opened and the film cartridge is stored in the cartridge chamber.

Then, the user holds the film coming out of the film cartridge in his hand and positions it on the path leading from the film outlet of the cartridge chamber to the film exposure section. Thereafter, the film is loaded by manually operating the winding lever or by activating an automatic film winding device by opening the back cover or the like.

(Problem to be Solved by the Invention) However, in the case of the prior art described above, when loading the film, the user must place the film in a predetermined position or insert it into the film feed port. First, the handling of the film was cumbersome and time-consuming. This problem exists both in cameras with manual film winding and in cameras equipped with an automatic film winding device.

SUMMARY OF THE INVENTION An object of the present invention is to make it easier to load film stored in a film cartridge into a camera, and to also allow the film to be rewound.

[Means for solving problems]

The camera according to the present invention is characterized by a cartridge rotation drive mechanism that rotates the film cartridge in the cartridge chamber in the direction in which the film is loosened, and as the film cartridge rotates in the direction in which the film is loosened, the leading edge of the film is removed from the cartridge chamber. A guide surface for slidingly guiding the film to the film feeding port to the film exposure section is formed over almost the entire circumference of the cartridge chamber, and a film rewinding shaft for rotating the film cartridge for rewinding the film, and a film cartridge for rewinding and rotating the cartridge shaft of the film cartridge; A cartridge reversal prevention mechanism is provided to prevent rotation of the film cartridge in the rewinding direction during the film rewinding rotation.

[For production]

In fact, if you store the film cartridge in the cartridge chamber, no matter where the leading edge of the film coming out of the film cartridge is located around the cartridge axis, the film cartridge will be rotated in the direction in which the film is unwound by the cartridge rotation drive mechanism. As the film is rotated, the leading edge of the film is guided by the guide surface of the cartridge chamber and inserted into a film feed port for a manually operated film winding mechanism, an automatic film winding device, or the like.

On the other hand, when the film rewinding shaft rotates to rewind the film, the film cartridge is prevented from rotating in the film rewinding direction by the cartridge reversal prevention mechanism. It is rewound within.

〔Example〕

The present invention will be described in detail below based on the drawings.

FIG. 2 is a perspective view from below of the camera (CA) according to the present invention.

This camera (CA) has a flash emission window (3), a finder window (4
), and a subject distance measuring window (5) which also serves as a light receiving window for detecting subject brightness.

At the bottom end of the camera body (1) there is a cartridge chamber (6
) is formed with an approximately circular opening (7). The cartridge chamber (6) stores a film cartridge (135 type film cartridge specified by JIS) (P) with the side from which the cartridge shaft (Px) protrudes upward (lower in Fig. 2). ing. The shaft center (
A locking lever (9) is provided adjacent to the opening (7), which is rotatably attached to the camera body (1) around x, ) and locks this lever (8) in the closed position.

This lock lever (9) is supported so as to rotate between a lock position in which the M (8) is locked in the closed position and an unlock position. In the lock position shown in FIG. 1, the camera (
A permanently open Lotus isochi (S3
). In addition, the lock lever (
An O-ring (10) is fitted to the shaft (9b) of the camera (9), which is interposed between the camera body (1) and makes the interior of the camera (CA) watertight. In addition, the lock lever (9)
A locking member for locking the locking member in the lock position may be separately provided.

An annular O-ring (11) is held on the inner wall of the lid (8), and when the M (8) is in the closed position, the
By being located between the ring (11) and the camera body (1), the interior of the camera (CA) is kept watertight.

Further, a shaft (8a) is erected on the inner wall of M (8), and a conical guide member (12) is attached to the tip of this shaft (8a).
) is rotatably supported. This guide member (12)
is a state in which the film cartridge (P) is stored in the cartridge chamber (6), and the cylindrical cartridge shaft on the non-protruding side (hereinafter referred to as the lower cartridge shaft) (Pxb)
The film cartridge (P) is positioned in the radial direction by engaging with the film cartridge (P).

Furthermore, a rotation prevention plate (
13) is rotatably provided. Rotation prevention plate (13
) is shown on the top side in the figure with the lid (8) in the closed position.
Film cartridge (
An annular elastic friction member (14) is attached that comes into contact with the lower end surface (Pb) of P). In addition, a rotation prevention plate (13
As shown in FIG. 3, serrated protrusions (13a) are formed on the lower surface in the figure.

On the other hand, a pair of temporary springs (15) are attached to the inner wall of M (8), and the free ends of the pair of leaf springs (15) are respectively attached to the projections (13a) of the rotation prevention plate (13). They are in elastic contact. The rotation prevention plate (13) is urged upward by the elasticity of the temporary spring (15), and the tip of the leaf spring (15) comes into contact with the upright surface of the protrusion (13a). Rotation in the counterclockwise direction in FIG. 3 is prevented.

In other words, the film cartridge CP) is the cartridge chamber (
6), unless a force exceeding the frictional force between the elastic friction member (14) and the lower end surface (Pb) of the film cartridge (P) is applied, the film will not move in the unwinding direction. It is designed not to rotate.

The cartridge chamber (6) is formed into a substantially cylindrical shape as shown in FIGS. Px) has an inner diameter that can be rotated around. That is, the inner diameter of the cartridge chamber (6) is [DI], and the distance from the center of the film cartridge (P) to the film drawer part (Pa
) to the outermost edge is [d1], then D,>2d.

It is.

In addition, as shown in FIG. 4, the top of the cartridge chamber (6) includes three guide levers (16), a cartridge detection pin (17), and a cylindrical shape on the protruding side of the film cartridge (P). A drive shaft (18) is provided that fits into the cartridge shaft (hereinafter referred to as the upper cartridge shaft) (Pxt) and transmits rotational drive to the cartridge shaft (Px).

The three guide levers (16) are arranged so as to be out of phase with each other by 120° around the circumference of the patrone chamber (6). Each guide lever (16) has an upright position approximately 50'' up from the ceiling (6a) of the patrone chamber (6), as shown by the two-dot chain line in FIG. ), and are rotatably attached to the retracted position.Then, each is biased toward the upright position by a spring (not shown).

As the loaded film cartridge CP) is inserted deep into the cartridge chamber (6), the three guide levers (16) move the upper end surface (
Pt) is pushed to the retracted position against the biasing force of the spring, and its tip pushes the upper cartridge shaft (Pxt) toward the center of the cartridge chamber (6), causing the upper cartridge to Guide the drive shaft (18) so that it is engaged with the shaft (Px L). In addition, the guide lever (16)
The number of the cartridges is not limited to three, but may be any number that does not interfere with guiding the upper cartridge shaft (Pxt) of the film cartridge (P) toward the center of the cartridge chamber (6).

The cartridge detection bin (17) can freely move in and out between a protruding position where it projects from the ceiling surface (6a) of the cartridge room (6) into the cartridge room (6) and a retreat position where it retreats from the cartridge room (6). It is attached to the spring (
19) toward the protruding position. This bar-
11- The detection bin (17) detects the upper end surface (Pt) of the film cartridge (P) inserted into the cartridge chamber (6).
is pushed to the retracted position, and the normally open loading switch (S
2).

The drive shaft (18) includes a protrusion (18a), a plate portion (18b) having a width that can be inserted into the upper cartridge shaft (Pxt), and a transmission shaft (20) coupled to a gear (G26). It consists of a cylindrical part (18c) that fits on the outside. Then, in the long hole (18d) in the longitudinal direction formed in the cylindrical part (18c),
A pin (20a) provided on the circumferential surface of the transmission shaft (20) is fitted, and the drive shaft (18) as a whole can slide in the axial direction with respect to the transmission shaft (20). and is configured to rotate integrally with the transmission shaft (20). Further, this drive shaft (18) is urged toward the film cartridge (P) side (lower side in the figure) by a spring (21). The plate portion (18b) can transmit drive to the upper cartridge shaft (Px) by engaging with a groove (not shown) in the upper cartridge shaft (Pxt).

As shown in Figure 5 (a) to c), the camera (CA
), in addition to the ball room chamber (6), there are film transport rollers (22
), pressure roller (23), photographic lens (2), shutter (24), film exposure section (25), film pressure bonding plate (26), film measurement sprocket (27), spool chamber (28), motor (M ) built-in spool (2
9), a film guide lever (30), and a battery compartment (31) for storing a battery (E).

On the side wall of the cartridge chamber (6) is a film cartridge (
A slit-shaped film outlet (
6c) is formed. Film transport roller (22
) and the pressure roller (23), both of which have peripheral walls made of an elastic rubber material, are disposed near the film delivery port (6c). The film transport roller (22) is driven by a motor (
the shaft (22a) driven by the gate (gate).

Further, the pressure roller (23) is rotatably supported and pressed against the film conveyance roller (22). As the film transport roller (22) rotates, the film (F) sandwiched between the rollers (22) and (23) is transported in the left-right direction in the figure according to the rotation direction. There is.

The film measurement sprocket (27)
) is rotated by engaging the perforations of the film CF) when it is fed, and as described later, drives the film counter (39) and also moves a portion of the film (
One piece Suinochi (S
Perform the operation in 5). The guide lever (30) has a rotatably provided roller (30a) at its tip, and has a mounting shaft (30).
A lever is rotatably mounted around the roller (30a), and the roller (30a) is biased by a spring (not shown) so as to be elastically pressed against the peripheral wall of the spool (29).

This guide lever (30) is connected to the spool chamber (28).
), the leading edge of the film (F) is guided around the spool (29) in the direction shown in the figure, and the film (F) that has been wound around the spool (29) is held down to ensure that it does not wind. It is supposed to be done.

The photographic lens (2) is operated by a lens driving device (2) based on information about the distance to the subject detected by a distance measuring device (not shown).
(not shown) to automatically adjust the focus on the subject. Also, the shutter (24)
is a so-called program lens shutter that changes its aperture over time, and is controlled by an exposure control device (not shown) based on the brightness information of the subject detected by a photometer (not shown).
The camera is configured to automatically control exposure.

A pair of light shielding members (32) are provided on the sides of the film transport roller (22) and the pressure roller (23).

(33) is provided. This pair of light shielding members (32
) and (33) are both made of an elastic member such as rubber, which has a light-shielding property, and are attached with their tip portions elastically abutting each other. This pair of light shielding members (32
), (33) means that when M (8) is open, light leaking from the film outlet (6c) of the cartridge chamber (6) is transmitted to the film exposure section (25) and the spool chamber (2).
8). Therefore, even if the lid (8) is inadvertently opened after several copies have been taken and the film has not been rewound yet, the exposed film can be prevented from being exposed.

In addition, light shielding may be further ensured by attaching a light shielding cloth such as a telescope to the surfaces of the light shielding members (32) and (33) that contact each other.

Next, the drive shaft (18
), film transport roller (22), and spool (
In 29), the drive transmission mechanism that transmits the driving force from the motor (M) will be explained.

As shown in Fig. 6, the gear (G1) fixed to the rotating shaft (Ma) of the motor (M) constitutes the reduction gear train (G2), (G3), (G4), (G5).
, (G6), and (G7) are interlocked and connected to the gear (G8). The gear (G8) has a pair of upper and lower gears (G9) and (GIO) in the figure.
It is fixed so that it rotates together with the

The lower gear (GIO) in the figure is coupled to a gear (Gll) that rotates integrally with the spool (29).

In other words, the rotation of the gear (G1) accompanying the rotation of the motor (M) rotates the spool (29) in a direction opposite to the rotational direction of the motor (M).

On the other hand, the gear (G8) in the upper part of the figure rotates together with the gear (G8).
9) are gears (G12), (G13), (G1
4) It is connected to the sun gear (G17) via (G15) and (G16). The planetary gear (G18) that meshes with the sun gear (G17) is a lever (35) that is rotatably supported on the rotation shaft (34) of the sun gear (G17).
is rotatably attached to. This planetary gear (G1
8), when the sun gear (G17) rotates in the direction A in the figure, it moves to the position where it meshes with the gear (G19), and the sun gear (G17) rotates in the direction A in the figure.
When G17) rotates in direction B in the figure, it moves to a position where it meshes with gear (G20).

The gear (G19) is fixed to the drive shaft (22a) of the film transport roller (22), and the gear (G21)
) and (G22) to the gear (G23). This gear (G23) is connected to a drive shaft (18) for the film cartridge (P) via a one-way clutch (36). One-way clutch (36
) is configured to transmit its rotational force to the drive shaft (18) only when the gear (G23) rotates in the direction shown in the figure. On the other hand, gear (G20) is gear (G24), (
A gear (G25) fixed to the drive shaft (20)
26).

The operation of the drive transmission mechanism configured as above will be explained.

When the rotating shaft (Ma) of the motor (M) rotates in the direction B in the figure, the spool (29) rotates in the direction A in the figure, that is, in the direction in which the film (F) is wound up. In addition, the sun gear (G
17) rotates in the direction A in the figure, and the planetary gear (G18) meshes with the gear (G19), so that the film transport roller (
22) rotates in the direction shown in the figure, that is, in the direction in which the film is conveyed to the spool chamber (28) in cooperation with the pressure roller (23). Furthermore, the drive shaft (18) for the film type 1-rone (P) rotates in the direction A in the figure, driving the cartridge shaft (Px) in the direction in which the film (F) is unwound.

As a result, the film (F) in the film cartridge (P) is pushed to the left in the figure by the film transport mechanism (FT), passes through the film exposure section (25), reaches the spool chamber (28), and reaches the spool ( 29). Also, at this time, the film transport mechanism (FT)
) The transport speed of the film (F) by the spool (2
9) is configured to be faster than the winding speed of the film (F) and the unwinding speed of the cartridge shaft (Px).

Therefore, even if the winding speed gradually increases due to the thickening of the film (I+) on the spool (29), the film (F) will continue to be transported! The film (F) is not wound up faster than the transport speed of +1 (pr), and the film (F) is prevented from being stretched.

In addition, the winding speed of the film (F) by the spool (29) is set to be the fastest, then the transport speed of the film (F) by the film transport mechanism (FT) is set to be the fastest, and the cartridge shaft (P
The drive transmission mechanism may be configured so that the unwinding speed of x) is the slowest. In this case, the spool (29) will rotate faster than the film transport speed, but a friction mechanism is inserted in the spool (29) or in the drive transmission mechanism to drive the spool (29) by friction. You can configure it like this. That is, the spool (
This is because the increase in the winding speed due to the thickening of the film in 29) is absorbed by the friction mechanism.

On the other hand, when the rotating shaft (Ma) of the motor (M) rotates in the direction A in the figure, the spool (29) rotates in the direction B in the figure.

In addition, the sun gear (G17) rotates in the direction B in the figure, and the planetary gear (G18) meshes with the gear (G20), so that the drive shaft (18) for the film cartridge (P) is rotated in the direction B in the figure.
direction, rotate the cartridge shaft (Px) to the film (F
) is driven in the direction in which it is caught. The rotation of the drive shaft (18) in the direction B in the figure is controlled by the one-way clutch (3).
6) to the gear (G23), further transmitted to the gear (G19) via the gears (G22) and (G21), and the drive shaft (2) of the film conveying roller (22).
2a) is driven and rotated in the direction B in the figure.

This causes the film (
F) is transported to the right in the figure by the film transport mechanism (FT) and rewound into the film cartridge (P). That is, the drive shaft (18) is connected to the cartridge shaft (
The film rewind shaft (Px) rotates the film rewind shaft (
R5).

On the other hand, the film measuring sprocket (27) is configured to be driven by engaging with the perforations of the film (F) being conveyed, as already described. The film measuring sprocket (27) is connected to the - frame switch operating mechanism (3) via the sprocket operating mechanism (37).
8) and a film counter (39).

The one-frame switch operating mechanism (38) is linked to the shack (24), and closes the one-frame switch (S5) when exposure of a portion of the film (F) is completed, and closes the one-frame switch (S5) to open the film measurement sprocket I. - (27) is driven and a portion of the film (F) is driven by the sprocket actuating mechanism (37);
When the completion of hoisting is detected, - piece switch (S5)
It is configured to open.

Further, the film counter (39) changes the display on the display device (40) according to the operation of the sprocket operation mechanism (37), and also changes the display on the display device (40) according to the operation of the sprocket operation mechanism (37).
) to open and close the initial hoisting switch (S4). This initial winding switch operating mechanism (41) closes the initial winding switch (S4) until the film counter (39) detects the -th frame of the film (F), and the film counter (39) The initial winding switch (S4) is configured to open when the -th frame (F) is detected.

Next, the motor drive circuit shown in FIG. 7, which drives the motor (M) involved in transporting the film (F), will be explained.

In this circuit, (Sl) is the main switch, (S2
) is the T'2 loading switch shown in Figure 1 that is closed when the film cartridge (P) is stored in the cartridge chamber (6).
The notch (S3) is a lock switch (S3) shown in FIG. 1 that is closed when the lock lever (9) is in the lock position.
4) is the initial winding switch shown in Fig. 6 which is closed until the film counter (39) counts the -th frame from the initial state, and (S5) is opened when winding of a part of the film (F) is completed. 6th, which is closed when the exposure is finished.
The one-frame switch shown in the figure (S6) is a rewind switch that is closed when the rewind lever (not shown) is in the rewind position;
Further, (S7) is a rewinding completion switch (S7) that is closed when rewinding of the film (P) is completed.

The motor (M) is connected to a battery (E) as a power source via a main switch (Sl) and a pair of glue race inches (RLI), (RL2). Both relay switches (RLI) and (RL2) are activated by conduction of respective transistors (TI) and (T2), respectively, and connect the motor (M) and the power source battery (E). Furthermore, when both relay switches (RLI) and (RL2) are not in operation, both electrode terminals of the motor (M) are short-circuited and the motor (M) is stopped. And a pair of transistors (Tl), (T2
) are connected to the collectors of transistors (T3) and (T4) separately, and when these transistors (T3) and (T4) enter the “○N” state, transistors (TI) and (T2 ) is in the “OFF” state, and the corresponding lace inch (RLI), (R
L2) becomes inactive.

One input terminal of the AND circuit (ANL) is connected to the connection point between the loading switch (S2), the lock switch (S3), and the pull-down resistor (R1), and the other input terminal is connected to the initial winding switch (S4). It is connected to the connection point with the pull-down resistor (R2). That is, AND circuit (8Nl)
There are three switches (S3) and (S4).

When both (S5) are closed, an "H" level signal is output.

One input terminal of the OR circuit (ORI) is connected to the AND circuit (A
The other input terminal is connected to the connection point between the one-piece switch (S5) and the pull-down resistor (R3). The output terminal of the OR circuit (ORI) is two transistors (Tl).

(T4) is connected to the base. That is, the OR circuit (
ORI) is “H” from the AND circuit (AN 1)
When receiving a high level signal or when the - piece switch (S5) is closed, an "H" level signal is output. This results in two transistors (TI).

(T4) becomes “ON” and the relay switch (+?
LL) operates and the motor (M) rotates in the forward direction.

In addition, the output terminal of the OR circuit (OR1) is connected to the inverter (
It is connected to the base of the transistor (T5) via IN3). This transistor (T5) includes a constant current circuit (CG), a capacitor (C1), a constant voltage circuit (CE),
Together with the comparator (CPI), it constitutes a timer circuit. Comparator (CPI) is “ON”
The transistor (T
5) outputs an "H" level signal when the charging voltage of the capacitor (C1) becomes higher than the voltage of the constant voltage circuit (CE) by continuing the "OFF" state for a predetermined period of time. The output terminal of this comparator (CPI) is an OR circuit (0
[R2)]. The other input terminal of this OR circuit (OR2) is connected to the inverter (IN
2) is connected to the connection point between the minus switch (S5) and the pull-down resistor (R3'). That is, the OR circuit (OR2) is activated when the comparator (CPI) outputs an "H" level signal, or when - piece switch isochi (S5) is output.
When it is opened, it outputs an "H" level signal.

One input terminal of the AND circuit (AN2) is the OR circuit (O
R2), and the other input terminal is connected to the output terminal of an AND circuit (ANI) via an inverter (INI). And the AND circuit (AN2)
The output terminal of is connected to the base of the transistor (T3). That is, the AND circuit (AN2) outputs a "H" level signal when the AND circuit (ANI) outputs a "L" level signal and the OR circuit (OR2) outputs a "H" level signal. Output. As a result, the transistor (T3) enters the "○N" state, and the motor (M)
stops.

On the other hand, the bases of the two transistors (T2) and (T3) are connected to the rewind switch (S6) and the pull-down resistor (R4).
) is connected to the connection point. In other words, the rewind switch (
S6) is closed, the two transistors (T2
) and (T3) are both ``ON'' state relay switch (RL2) is activated and the motor (M) is reversed.

Further, the base of the 1-transistor (T4) is connected to the connection point between the rewinding completion switch (S7) and the pull-down resistor (R5). When the rewinding completion switch (S7) is closed, the 1-transistor (↑4) is turned on, and the motor (M) that is rotating in reverse stops.

This rewinding completion switch (S7) is connected to the film conveyance roller (22) in the film (F) conveyance path and the pressure roller (
23). The opening is opened when the film (P) is present at that position and comes into contact with the film (F), and is closed when the film <p> is not present. Rewind completion switch (S
In 7), instead of this configuration, for example, both the film conveyance roller (22) and the pressure roller (23) are formed from conductive materials, and they contact each other when the film (F) is not present. It may be configured such that the film (F) is closed between the two and opened when the film (F) is present between them.

Next, each operation of the camera configured as above will be explained.

<1> Film loading operation As shown in Figure 2, with the lid (8) of the cartridge chamber (6) open, insert the film cartridge <p> into the cartridge chamber (6) with the upper cartridge shaft (Pxt) side first ). At this time, the film take-out part (Pa) of the cartridge (P) may be located at any position around the cartridge shaft (Px).

Further, in this camera (CA), film can be loaded without touching the film cartridge (P) by a method different from the method described above. Next, I will explain it.

! As shown in Figure 8 (<), film cartridge (P)
In general, the upper cartridge axis (Px t) is M (42
It is housed in the patrone case (42) in a posture located on the a) side. When loading film, first
As shown in Figure (A), turn the camera (CA) upside down, open the lid (8) of its cartridge chamber (6), and remove 1 (42a) of the cartridge case (42). Next, see Figure 8 (
As shown in III), the cartridge case (42) is inverted and placed in the opening (7) of the cartridge chamber (6). As a result, the film cartridge (P) shown in Fig. 8 (
As shown in c), it falls into the cartridge room (6).

In either method, when the lid (8) is closed, the film cartridge (P) is stored in the cartridge chamber (6) as shown in FIGS. 1 and 5 (A). At this time,
Even if the cartridge shaft (Px) is inserted into the cartridge chamber (6) with a slight incline, the guide lever (16 ) pushes the upper cartridge shaft (Px) toward the drive shaft (18) located in the center of the ceiling surface (6a) of the cartridge chamber (6), and
The guide member (12) attached to (8) is attached to the lower cartridge shaft (
By entering Pxb), the posture of the film cartridge (P) is corrected so that the cartridge shaft (Px) stands upright with respect to the ceiling surface (6a) of the cartridge chamber (6).

As shown in FIG. 1, when M (8) is closed and locked, the elastic friction member (14) fixed to the rotation prevention plate (13) is attached to the leaf spring (15). Both members (P) are elastically pressed against the lower end surface (Pb) of the film cartridge (P) by force.

(14) Within the range of frictional force between the rotation prevention plate (13)
and Film Patrone (P), Patrol Axis (Px
) are integrally joined around the As a result, the film type 1-Rone (P) moves in the direction A in the figure in Figures 5 (A) to 5 (C) due to the engagement of the serrated protrusion (13a) and the temporary spring (15). Only rotation will be allowed.

The drive shaft (18) for the film cartridge (P) is
The upper bar) - engages in the lower shaft (Pxt), and its plate (18b) engages with the groove in the upper cartridge shaft (Pxt) to transmit rotational driving force to the cartridge shaft (Px). Be able to communicate. Projection (18a) at the tip of the plate (18b)
When inserting the film cartridge (P), the groove in the upper cartridge shaft (Px t) and the plate part (18) of the drive shaft (18)
8b) is provided so as to engage smoothly.

If the plate portion (18b) of the drive shaft (18) does not fit into the upper cartridge shaft (Pxt) when inserting the film cartridge (P), the drive shaft (18)
) against the urging force of is configured to engage in In this state, the tip of the film (F) has its own elasticity, and the cartridge chamber (
6) is in elastic sliding contact with the inner wall.

Furthermore, in FIG. 1, when the film cartridge (P) is inserted, the cartridge detection bin (17) moves upward in the figure against the urging force of the spring (19), and the loading switch (S2) closes. will be accomplished. Also, lock lever (9)
is rotated to the lock position, the lock switch (S
3) is closed. At this time, the main switch (Sl)
is assumed to be closed. Further, the initial winding switch (S4) is closed because the film counter (39) is in the initial state.

Therefore, in FIG. 7, the AND circuit (ANI) and the OR circuit (ORI) output an "H" level signal, and the transistor (TI) becomes "ON" and the motor (M)
starts rotating forward. This normal rotation is caused by the film counter (3
9) detects the -th frame of film (F), and it's the first time! The UI winding switch (S4) is opened, and the - piece is moved (
This continues until S5) is released.

In Figures 5 (a) to 6), when the motor (old) rotates in the normal direction, that is, when the rotating shaft (Ma) rotates in the direction B in the figure, the spool (29) rotates as shown in the figure. The planetary gear (G18) meshes with the gear (G19), and the film transport roller (22)
and the drive shaft (18) rotate in the direction A in the figure.

By rotating the drive shaft (18) in the direction A in the figure, the cartridge shaft (Px) is rotated in the direction in which the film (F) is unwound. That is, the film cartridge (P) in the cartridge chamber (6) is connected to the drive shaft (18) that engages with the groove in the upper cartridge shaft (Pxt) and the drive transmission mechanism for this drive shaft (18). (F) constitutes a cartridge rotation drive mechanism (PM) that rotates the cartridge in the direction of unwinding.

Due to this rotation, there is a frictional resistance between the film (F) and the telescope at the film drawer part (Pa) of the film cartridge (P).
), the film (F) spreads in the axial and radial direction within the film cartridge (P), and the film cartridge (P)
) comes into pressure contact with the inner wall of the In this state, the cartridge shaft (PX), the film (F), and the film cartridge (P) come to rotate integrally.

As shown in FIG. 1, an elastic friction member (14) biased by a leaf spring (15) is in contact with the lower end surface (Pb) of the film cartridge (P). The rotation prevention plate (13) and the temporary spring (14) are connected to the rotation prevention plate (14).
5) is adapted to allow rotation of the film (F) in the feeding direction, and the film cartridge (P) starts rotating in the direction A in FIG. 5(A) together with the film CF). Along with this rotation, the film (F)
The tip of the cartridge moves in the direction A in the figure while being guided in sliding contact with a guide surface (6A) formed over almost the entire circumference of the inner wall of the cartridge chamber (6). It reaches the film delivery port (6c).

Then, as shown in FIG. 5(b), the leading edge of the film (F) passes through the film delivery port (6c) and is inserted between the film transport roller (22) and the pressure roller (23). It will be done. The film conveyance roller (22) is driven and rotated in the direction A in the figure, and the film (F) is conveyed to the left in the figure.

Then, the film (F) reaches the spool chamber (28) after passing between the film exposure section (25) and the film pressure bonding plate (26), and as shown in FIG. ) is wound onto the spool (29) in the direction into the figure.

As mentioned above, the motor (M) rotates forward and the film (F)
When the winding operation is performed, as mentioned above, the speed at which the film (F) is unwound from the cartridge shaft (Px) due to the rotation of the drive shaft (18) depends on the film transport rollers (22) and (23). The transport speed is set to be slower than the transport speed of the film (F). Therefore, as the winding operation of the film (F) progresses, the initial looseness of the winding of the film (F) gradually decreases and eventually disappears.

After that, the film wrapped around the cartridge shaft (Px) (
F) will be forcibly solved, so the drive shaft (18
) is rotated faster than the rotational speed of gear (G23).

However, as shown in FIG. 6, there is a gap between the drive shaft (18) and the gear (G23) that prevents the gear (G23) from rotating in the direction shown in the figure. Since a one-way clutch (36) that only transmits rotation in the B direction is provided, no inconvenience occurs.

Then, the film measuring sprocket (27) starts rotating when it engages with the perforation at the leading end of the film (F) being conveyed, and as already mentioned, the film counter (39) and the - frame switch are activated. Mechanism (38
). A film counter (39) counts the number of film (F) based on the count of perforations.
When the leading edge of the frame is detected, the initial winding switch (S4) is opened, and then when it is detected that the -th frame of the film (F) is located in the film exposure section (25), the -frame winding switch (S5) is opened. It will be released.

As a result, in FIG. 7, the AND circuit (ANI) and the OR circuit (ORI) both output "L" level signals, the transistor (T3) becomes "ON" and the motor (M) stops. do.

<2> Shooting operation and winding operation The film (
After the initial hoisting of F) is completed, press the initial hoisting switch (S
4) remains open and the AND circuit (ANI”)
The output signal from the circuit maintains the "L" level.

In this state, when a shirt release operation is performed using a release button (not shown), the film (F) is exposed by the shutter (24), and then the - frame switch (
S5) is closed.

Therefore, in FIG. 7, from the OR circuit (ORI)
” level signal is output and the transistor (T1) is “
ON” state and the motor (M) rotates forward.

As a result, in FIG. 6, the drive shaft (18), film conveyance roller (22), and spool (29) all rotate in the direction A in the figure, and the film (F) moves to the left in the figure. transported. At this time, the released shutter (
24) is adapted to be charged again by a shutter charge mechanism (not shown).

On the other hand, the film measurement sprocket (27) is driven by the transported film (F) and rotates in the direction A in the figure.
The film counter (39) is actuated via the subq gent actuation mechanism (37).

When conveyance of a portion of the film (F) is completed, the one frame adjustment mechanism (S5) is opened via the - frame switch operating mechanism (38), and the motor (M ) stops.

3) Film tension detection operation During the film winding operation of <2> mentioned above, the OR circuit (O
Since the output signal from the inverter (IN3) is at the "L" level while the "H" level signal is being output from the inverter (RI), the transistor (T5) is in the "OFF" state. Therefore, the capacitor (C1) is charged by the current from the constant current circuit (CC).

Even if the winding operation of the film (F) continues for a predetermined time (that is, a period slightly longer than the time normally required to wind a part of the film (F)), the one-frame switch (S5) is activated.
If the capacitor (CI) is not opened, the charging voltage of the capacitor (CI) increases and becomes higher than the voltage of the constant voltage circuit (CE), and the output signal of the comparator (CPI) is inverted to the "l" level. , the output signal from the AND circuit (ANI) is at “L” level, so the AND circuit (AN2
) is open, and the "H" level signal from the comparator (CPI) passes through the OR circuit (OR2) and is output from the AND circuit (AN2). Therefore, the transistor (T3) is turned on and the motor (M) is stopped.

This state usually occurs when the film (F) stops being fed when all frames of the film (F) have been photographed or when some other trouble occurs. In other words, the film measurement sprocket! This is because - (27) is not driven and - piece switch 7 (S5) is not released even after a predetermined period of time has elapsed.

On the other hand, when the film is being conveyed normally, if the one-frame switch (S5) is opened within a predetermined time, the output signal from the OR circuit (ORI) becomes low level. Since the transistor (T5) is turned on via the inverter (IN3), the capacitor (C
1) is discharged, thereby returning the capacitor (C1) to its initial state.

4> Film rewinding operation Film rewinding operation is set by operating a rewinding lever (not shown), and in FIG. 7, when the rewinding switch (S6) is closed, the transistor (T2) is turned on. ” state, the relay switch (RL2) operates and the motor (M) reverses. As a result, in Fig. 6, the drive shaft (18
), film transport roller (22), and spool (
29) rotate in the direction B in the figure, and the spool (29) rotates in the direction B in the figure.
) is conveyed to the right in the figure.

During the rewinding operation, as the drive shaft (18) rotates,
A film (F) locked to the cartridge shaft (Px),
The film cartridge (P) itself receives rotational force due to friction between the film drawer part (Pa) and the television. However, an elastic friction member (14) is in contact with the lower end surface (Pb) of the film cartridge (P), and its frictional force is larger than the frictional force between the film (F) and the telescope. The rotation prevention plate (13) to which this elastic friction member (14) is attached prevents the rotation of the film (P) in the unwinding direction by the engagement of its protrusion (13a) and plate spring (15). Since it is blocked, the film cartridge (P) does not rotate.

That is, the elastic friction member (14), the rotation prevention plate (13),
The leaf spring (15) constitutes a cartridge reversal prevention mechanism (R1) that prevents rotation of the film cartridge (P) during film rewinding operation.

Therefore, the film transported to the right in FIG. 6 is rotated by the drive shaft (18).
) is rewound. When all the film (F) is rewound into the film cartridge (P), the rewind completion switch (
S7) is closed. As a result, in FIG.
- The run transistor (T4) becomes "ON", the transistor (T2) becomes "OFF", and the motor (M) stops.

In the previous embodiment, the cartridge rotation drive mechanism (PM) is provided with a drive shaft (18) that engages with a groove in the upper cartridge shaft (Pxt). The specific configuration of the patrone rotation drive mechanism (PM) can be changed as appropriate, and one example will be described next.

As shown in FIGS. 9(a) to 9(c), a pair of support levers (51
), (52) are separate mounting shafts (51a), (5
2a) is rotatably supported. Both levers (51)
, (52), cartridge support rollers (53), (54) are rotatably supported, respectively.

These support levers (51) and (52) are linked to the operation of the lid (8) of the cartridge chamber (6) via an interlocking mechanism (not shown), and when the lid (8) is in the open position, It is in the retracted position shown in FIG. 9(A), and moves to the operating position shown in FIGS. 9(U) and (C) when the lid (8) is closed. And those support levers (51) and (52
) is in the operating position, the pair of cartridge support rollers (53) and (54) respectively move the upper cartridge shaft (
PxL) from the measurement method.

In the figure, reference numeral (55) denotes a sun roller, which is supported by a mounting shaft (55a) and is operatively connected to a drive mechanism (not shown) so that it can be rotated in both directions. This drive mechanism is almost the same as the drive mechanism in the previous embodiment shown in Fig. 6, and in this embodiment, a sun roller (55) is provided in place of the drive shaft (18) in Fig. 6. You can think that.

A lever (56) is rotatably supported on the mounting shaft (55a) of the sun roller (55). This lever (
At both opposite ends of 56), a pair of planetary rollers (57),
(58) is rotatably supported. Both planetary rollers (57) and (58) are frictionally coupled to the sun roller.

When the sun roller (55) rotates in the direction shown in the figure, the lever (56) rotates and the planetary roller (58) is moved around the outer periphery of the upper cartridge shaft (Pxt), as shown in FIG. 9 (II+). The rotation of the sun roller (55) causes the rotation of the planetary roller (5
8) to rotate the cartridge shaft (Px) in the direction shown in the figure. On the other hand, the sun roller (55) is B in the figure.
When the lever (56) rotates, the planetary roller (57) comes into contact with the outer periphery of the upper patrone shaft (Pxt), and the sun roller (55) The rotation is transmitted via the planetary roller (57), rotating the cartridge shaft (Px) in the direction B in the figure.

In this configuration, for example, even if the upper cartridge shaft (Pxt) is inserted at a position slightly away from the center of the cartridge chamber (6), as shown by the broken line in FIG. 9(A), the M(8) A pair of support levers (51)
, (52) move from the retracted position to the active position, the pair of cartridge support rollers (53), (54)
The upper cartridge shaft (Pxt) is pushed toward the center position, and the posture of the film cartridge (P) is corrected.

The lever (56) is biased with a weak force so that it stops at the position shown in FIG. 9(a) when the sun roller (55) is not rotated. Therefore, even if the upper cartridge shaft (Pxt) of the film cartridge (P) inserted into the cartridge chamber (6) is biased toward the sun roller (55), when the sun roller (55) is driven and rotated, , any 'ML roller (57 or 58)
It is pushed towards the center by

Next, yet another embodiment will be described. Figure 10 and 1
In the case shown in FIG. 1, the configuration of the cartridge chamber (6) is different, and the cartridge rotation drive mechanism (PM) is configured accordingly.

As shown in FIG. 10 (a) to c), the inner diameter of the cartridge chamber (6) Φ is measured from the outermost edge of the film drawer part (Pa) of the film cartridge (P) to the cartridge shaft (P).
It is formed to be slightly larger than the distance from the center of x) to the peripheral wall of the opposing film cartridge (P). That is, the inner diameter of the cartridge chamber (6) is [D2], the distance from the center of the film cartridge (P) to the outermost edge of the film drawer (Pa) is [a+], and the radius of the cylindrical part of the film cartridge (P) is Let be [d2], then 2・d l > D! > d l + d 2. Therefore, in the cartridge chamber (6), the cartridge shaft (Px) eccentrically rotates as the film cartridge (P) rotates.

Therefore, as shown in FIG. 11, the protrusion (18a) and plate portion (18) of the drive shaft (18) in the embodiment shown in FIG.
b) and a protrusion (59a) and a plate (59b) corresponding to
) with a transmission spring (60).
In the embodiment shown in FIG.
0). This transmission spring (60)
stands upright and supports the drive machine (59) in the free state. On the other hand, as the film cartridge (P) is loaded into the cartridge chamber (6), the driver (59) engages with the groove in the upper cartridge shaft (Pxt), and as shown in FIG. transform. Therefore, the drive plate (59), which is a deformation of the drive shaft, is allowed to transmit the driving force to the cartridge shaft (PX) in an eccentric state with respect to the center of the cartridge chamber (6).

As a result, the film cartridge (P) is driven and rotated with the cartridge shaft (Px) being eccentric with respect to the cartridge chamber (6).

In this configuration, the inner diameter of the cartridge chamber (6) can be reduced. In addition, by setting the inner diameter of this cartridge chamber (6) to an appropriate size, the cartridge axis (Px) of the inserted film cartridge (P) can be aligned with the center (C) of the cartridge chamber (6) in plan view. Can be made always inclusive.

That is, for example, by arranging the protrusion (59a) of the drive plate (59) approximately at the center of the cartridge chamber (6), the film drawer (Pa) can be positioned anywhere around the cartridge shaft (Px). Film cartridge in position (P)
Even when the drive plate (59a) is inserted, the protrusion (59a) is guided into the upper cartridge shaft (Pxt).
) is smoothly engaged with lI↓ in the upper cartridge shaft (Pxt).

Figure 10 (a) shows the upper cartridge shaft (
The drive plate (59) is shown engaged with the groove in the drive plate (59). Thereafter, by the same operation as in the previous embodiment, the lid (8) of the cartridge chamber (6) is closed, and the drive vi (59) is closed.
When rotated in direction A in the figure, the film cartridge (P
) rotates eccentrically from the center (C) of the patrone chamber (6).

As a result, the tip of the film (F) is placed in the cartridge chamber (6).
) while being guided in sliding contact with the inner wall (6A) of the film in the direction A in the figure, and reaches the film delivery port (6c) as shown in FIG. 10 (b). As the film cartridge (P) is further driven and rotated, the leading edge of the film (F) passes through the film delivery port (6) as shown in Figure 1O (c).
c) and is directed to a film transport mechanism (not shown in FIG. 10(c)).

Figure 12 shows the cartridge (P
) rotation prevention mechanism (R
Another example of 1) is shown.

In this embodiment, the dimensions and shape of the patrone chamber (6) are the same as those shown in FIGS. 10(a) to 10(c). Then, a slit recess (6d) is formed in a part of the inner wall (6A) of the patrone chamber (6).
d) is provided with a locking lever (61).

This locking lever (61) has an active position in which it projects into the cartridge chamber (6), indicated by a solid line in the figure, and a retracted position, in which it retreats outside the cartridge chamber (6), indicated by a two-dot chain line in the figure.
It is rotatably mounted. The rewind lever is configured to move to the operating position when the film rewind operation is set in conjunction with the operation of a rewind lever (not shown) linked to the rewind switch (S6).

During the film rewinding operation, the cartridge shaft (Px) is driven in the direction B in the figure, so that a force acting on the film cartridge (P) itself to rotate it in the direction B in the figure. However, since the locking lever (61) in the operating position comes into contact with the film drawer (Pa), rotation of the film cartridge (P) in the direction B in the figure is prevented, and the film (F) is prevented from rotating in the direction B in the figure. It is smoothly rewound into P).

On the other hand, this locking lever (61) is connected to the cartridge chamber (61) when loading the film (F) or winding the film (P).
6) In the outside retracted position. In addition, this locking lever (61
) should be about [1.0 mm], and the width of the slit recess (6d) necessary for its entrance and exit should also be about [1.0 mm].
m], so it does not interfere with transporting the film (F) in the film loading operation and film winding operation described above.

Note that it is of course possible to apply the configuration in which this locking lever (61) is provided to the patrone chamber (6) in the embodiment shown in FIGS. 5(a) to 5(c).

In each of the embodiments described above, in order to rotate the film cartridge (P) within the cartridge chamber (6), the upper cartridge shaft (Pxt) of the film cartridge (P) is
Although the configuration is shown in which the film (F) is rotationally driven in the direction in which the film (F) is unwound, the lower cartridge shaft (Pxb) on the opposite side may be configured to be driven in the direction in which the film (F) is unwound.

Furthermore, the cartridge rotation drive mechanism (PM) unwinds the film (F) by rotating the cartridge shaft (Px), and rotates the film (F) and the film cartridge (P).
Instead of the structure in which the film cartridge (P) is rotated by contact with the inner wall of the film cartridge (P), a structure may be adopted in which the film cartridge (P) itself is directly rotationally driven. As an example, although not shown, in the embodiment shown in FIG. 1, an elastic friction member (
14) is in contact with the rotation prevention plate (13).
) may be replaced by a disc, and this disc may be interlocked and connected to the motor (M) via a wire or the like.

〔Effect of the invention〕

As described above, in the camera according to the present invention, no matter where the leading edge of the film coming out of the film cartridge is located in the cartridge chamber around the cartridge axis, the film cartridge can be rotated by the cartridge rotation drive +R. The leading edge of the film is guided by the guide surface of the cartridge chamber and inserted into the film delivery port of a manually operated film winding mechanism or an automatic film winding device. be. Therefore, when loading film into the camera, there is no need for the user to set the film in a predetermined position or insert it into the film feed port, and the user can simply store the film cartridge in the cartridge chamber. It is now possible to load film.

On the other hand, while the film cartridge can be rotated to easily load the film, the cartridge reversal prevention mechanism prevents the film cartridge from rotating, making it possible to rewind the film without any trouble.

[Brief explanation of drawings]

The drawings show an embodiment of the camera according to the present invention, in which Fig. 1 is a longitudinal sectional view of the cartridge chamber, Fig. 2 is a perspective view of the entire camera from below, Fig. 3 is a perspective view of the rotation prevention plate, and Fig. The figure is a perspective view of the top of the cartridge chamber, Figures 5 (a) and 5) are bottom views showing the internal structure of the camera, Figure 6 is a perspective view of the drive transmission mechanism, and Figure 7 is the circuit of the motor drive circuit. Figure, Figure 8 (
A) or C) is a schematic diagram showing the film loading operation;
Fig. 9 (a) to c) is a bottom view showing another embodiment of the cartridge rotation drive mechanism, and Fig. 10 (a) to c)
11 is a bottom view showing another embodiment of the cartridge chamber, FIG. 11 is a sectional view showing the cartridge rotation drive mechanism for the cartridge chamber of the embodiment shown in FIGS. FIG. 7 is a bottom view showing another embodiment of the mechanism. (6)...Patrone room, (6A)...
・Guide surface, (6c)...Film delivery port, (
18), (59)... Drive shaft, (25)
...Film exposure section, (F) ...Film, (P) ...Film cartridge, (Px)
......Patrone shaft, (PM)...Patrone rotation drive mechanism, (R1)...Patrone reversal prevention mechanism, (RS)...Film rewinding shaft .

Claims (2)

[Claims] (1) A cartridge rotation drive mechanism is provided that rotates the film cartridge in the cartridge chamber in the direction in which the film is loosened, and as the film cartridge rotates in the direction in which the film is loosened, the leading edge of the film is moved from the cartridge chamber to the film exposure section. a film rewinding shaft for rotating the cartridge shaft of the film cartridge to rewind the film; A camera equipped with a cartridge reversal prevention mechanism that prevents the film cartridge from rotating in the film rewind direction. (2) The film rewinding shaft also serves as a drive shaft of the cartridge rotation drive mechanism.
The camera described in item 1).