JPS631295Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric film rewinding device for rewinding a film in a camera using an electric drive.

Various types of electric film rewinding devices have been proposed in the past, which rewind the film electrically using an electric drive device attached to or built into the camera, but these devices have not been completely satisfactory in terms of operability. It was not something that would be done. Normally, rewinding should not be performed easily while taking a photo, but with conventional cameras, rewinding is performed only by pressing the rewind button, so it is difficult to move the camera. Misoperations were occurring, such as pressing the rewind button by mistake when lifting or grasping the device with difficulty.

As an improved proposal to solve this conventional problem, the rewind button that frees the sprocket and the rewind button that operates the switch that drives the rewind motor are placed separately at the top and bottom of the camera. However, a problem has arisen in that the actual rewinding operation is complicated.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to provide an electric film rewinding device for a camera having a rewinding operation member that is extremely easy to operate and eliminates erroneous operation.

The present invention will be explained in detail below with reference to the drawings. FIG. 1 is a mechanical diagram showing an embodiment of an electric film rewinding device according to the present invention. In FIG. 1, 1 is a camera body, 2 is a film cartridge loaded into the camera body, and 3 is a film. 4 is a sprocket for feeding the film, and 5 is a sprocket release button. By pushing the release button 5 upward, the sprocket 4 is free to rotate by a known mechanism (not shown), and the film can be rewound. It becomes possible. 6 is an electric film rewinding device, M is an electric rewinding motor, and a gear 7 is fixed to its output shaft. Reference numeral 8 denotes an intermediate gear, which is rotatably supported by a shaft (not shown) and meshes with the gear 7. Reference numeral 9 denotes a rewinding shaft, which is rotatably supported by an upper bearing 10 and a lower bearing 11 that are fixed to a casing (not shown) of the electric rewinding device, and whose position is always directed downward by a spring 12. regulated by. A rewinding coupler 13 is installed at the upper end of the unwinding shaft 9 and engages with a spool pawl in the cartridge 2 (not shown), and a gear 9a is provided at its intermediate portion, and the gear 9a engages with the intermediate gear 8. Moreover, a spiral groove 9b is provided at the lower part of the unwinding shaft 9.
has. Reference numeral 14 denotes a guide pin, which is slidably supported by a guide pin receiver 15 fixed to the casing (not shown) of the electric rewinding device, and is also supported by the lower bearing 11.
By entering through the hole 11a of the rewinding shaft and engaging with the spiral groove 9b of the rewinding shaft, the rewinding shaft 9 is lifted upward as the rewinding shaft 9 rotates, and after being lifted up by a set amount, the rewinding shaft 9 The guide pin 14 is inserted into the bottom surface of the rewind shaft 9 to hold the rewind shaft 9 in a lifted state. Reference numeral 16 denotes a slider, and the slider 16 can be slid laterally by engaging a pin 17 fixed to a housing (not shown) of the electric rewinding device with a long hole 16a of the slider. , and its position is always restricted to the left by the spring 18. Reference numeral 19 denotes an intermediate lever, which is rotatably supported by a shaft (not shown), and a rising portion 19a at one end thereof engages with a pin 14a implanted in a guide pin, and the other end 19b engages with an end portion 16b of the slider 16. engage with. The guide pin 14 is biased by a spring 20 in the direction of engagement with the rewind shaft, but since the spring 20 is set to be weaker than the spring 18, the slider is biased by the spring 18 and positioned to the left. At this time, the position of the guide pin 14 is regulated by the intermediate lever 19 in a direction in which it is disengaged from the rewinding shaft against the spring 20 (a position as shown in FIG. 1). Arm portion 16c of slider 16
has a convex portion 16d for locking, and an operation lever 16 as a rewinding operation member at the tip thereof.
e is fixed. Reference numeral 21 denotes a lock lever, which is rotatably supported by a shaft 22 (shown in Figures 3 and 4) fixed to the casing (not shown) of the electric rewind device, and is always rotated counterclockwise by a spring 23. energized in the direction. A protrusion 21a is provided in the middle part of the lock lever 21.
The protrusion 21a has a convex portion 16 of the slider.
By engaging with d, movement of the slider 16 in the lateral direction is restricted. Reference numeral 24 denotes a push button, which is slidably supported by a housing (not shown) of the electric rewinding device and engages with the tip 21b of the lock lever. 25 is a communication lever, one end of which is 25a.
is rotatably supported by a pin 16g fixed to the bent portion 16f of the slider, and the lever 2
A pin 25b is installed in the middle of the pin 25.
b controls on/off of the switch Sw1. The other end of the communication lever 25 has a cam hole 25c, and the cam hole 25c is slidably supported by a pin 26 fixed to the casing (not shown) of the electric rewinding device. Convert horizontal movement to vertical movement. Further, the upper end 25d of the communication lever 25 is connected to a flange portion 27a of a pin 27 that is movable in the vertical direction.
The pin 27 engages the sprocket release button 5. FIG. 2 is a circuit diagram of the present invention, in which a switch Sw1 is connected in series to a power source B and a motor M. 3 and 4 are enlarged views of the operating portion of the electric rewinding device shown in FIG. 1. FIG. 3 shows the initial state, and FIG. 4 shows the rewinding state, in which the same parts as in FIG. 1 are designated by the same reference numerals.

Next, the operation of this embodiment configured as above will be explained. During photography, the camera is in the state shown in FIGS. 1 and 3. To perform electric rewinding after photographing is completed, first push the push button 24 in the direction of arrow A (as shown in the third figure). Then, the tip 21b of the lock lever that is engaged with the push button 24 is also pushed in, so the lock lever 21 rotates clockwise against the spring 23, causing the protrusion 21a to engage with one end of the convex portion 16d of the slider. Slider 1
6 can be slid to the right. Next, when the operating lever 16e is moved to the right with a finger, the lock lever 16 slides to the right along the pin 17 against the spring 18, and the upper end 25d of the communication lever first moves into the cam hole 25.
It moves upward due to the action of c. As a result, the pin 27 also moves upward, pushing up the sprocket release button 5 and freeing the sprocket 4 to rotate. When the slider is further slid to the right, the communication lever 25 connects with the parallel part 25e of the cam hole and the pin 26.
Since the pin 25b engages with the pin 25b, the upward movement is stopped, and then the pin 25b turns on the switch Sw1. or,
As the slider 16 moves to the right, the intermediate lever 19 engaged with the end portion 16b of the slider 16 rotates counterclockwise, and the guide pin 14 is moved by the spring 20 in the direction of the rewind axis, causing the rewind It engages with the spiral groove 9b of the shaft. When the operating lever 16e is fully slid to the right, the protrusion 21a of the lock lever engages with the other end of the convex portion 16d of the slider (the state shown in FIG. 4), and the slider 16 moves to the right against the spring 18. The slider remains in the state shown in FIG. 4 even if you release your finger from the operating lever in this state.

When the switch Sw1 is turned on, the motor M and the power supply B are connected in FIG. 2, and the motor M rotates. The rotation of the motor is transmitted to the rewind shaft 9 via gears 7, 8, and 9a. Since the spiral groove 9b of the rewinding shaft engages with the guide pin 14, the rewinding shaft rotates against the spring 12 and lifts up, and the rewinding coupler 13 engages with a spool pawl (not shown) in the cartridge 2, causing electric winding. Perform the return.

When the electric rewinding is completed, push the push button 24 in the direction of arrow A (as shown in FIG. 4), and the lock lever 21 will again rotate counterclockwise against the spring 23, and the protrusion 21a and the convex portion 16d of the slider will be rotated counterclockwise. The slider disengages from the other end and moves to the left by the force of the spring 18 and returns to the initial position, and the protrusion 21a of the lock lever and one end of the convex portion 16d of the slider engage again (the third condition shown). This causes the intermediate lever 19 to move towards the end 16 of the slider.
b, rotates clockwise, and the guide pin 14
is moved against the spring 20 to release the engagement between the rewinding shaft 9 and the guide pin 14, and the rewinding shaft 9 is moved against the spring 1.
2 to move downward and return to the initial state shown in FIG. Also, since the communication lever also moves to the left,
Pin 27 goes down and pin 25b switches Sw1
The motor will stop.

As explained above, in the present invention, the locking member always prevents the operation movement of the rewind operation member that switches the motor control switch, and the operation movement of the other lock release operation member This can be done only after releasing the locking member, which eliminates the problem of erroneous operation. In addition, since the operating section of the rewind operating member and the operating section of the unlocking operating member are arranged adjacent to each other, operability can be improved, and the operating direction of each operating section of both operating members can be controlled. Since the sliding movement and the pushing movement are performed in directions perpendicular to each other, the possibility of erroneous operation can be extremely reduced even if both operating parts are arranged adjacent to each other.

Furthermore, in the present invention, the sliding direction of the operating member on the side that slides is set in the film pull-out direction, that is, the direction of the line connecting the spool chamber and the cartridge chamber, and the operating member on the side that is pushed in is set on an extension line of the sliding direction. Since it is placed adjacent to the camera, you can change the grip condition slightly by using only one finger of the hand that is gripping the camera (for example, the thumb if both operating members are placed on the back cover side). Both operating members can be continuously operated and moved simply by operating the fingers in a direction that is easy to move.

In this embodiment, the camera body and the electric rewind device are described as separate bodies, but it goes without saying that they may be integrated.

[Brief explanation of the drawing]

FIG. 1 is a mechanical diagram showing an embodiment of the electric film rewinding device according to the present invention, FIG. 2 is a circuit connection diagram of the electric film rewinding device according to the present invention, and FIGS. FIG. 3 is an enlarged view of the rewinding operation section of the rewinding device, with FIG. 3 showing the initial state and FIG. 4 showing the rewinding state. 1... Camera body, 2... Film cartridge, 3... Film, 4... Sprocket, 5...
...Sprocket release button, 6...Film electric rewinding device, M...Drive motor, 9...Rewinding shaft, 10...Upper bearing, 11...Lower bearing, 13...
Rewinding coupler, 14... Guide pin, 15...
Guide pin holder, 16...Slider, 16e...
Operation lever, 19...Intermediate lever, 21...Lock lever, 24...Push button, 25...Communication lever, Sw1...Switch, 27...Sprocket release pin.

Claims (1)

[Claims for Utility Model Registration] In an electric film rewinding device for a camera that rewinds the film by driving a motor based on the operation of a switch that detects a rewind operation, the switch is operated from an initial position in which the switch is inactive. a rewind operation member movably supported to an operation position where the switch is operated by an external operation of the rewind operation member; a spring member that biases the rewind operation member toward the initial position; a locking member movably supported in a blocking position for blocking movement in the direction of the operating position and a blocking release position for releasing the blocking; and a lock release operation member movably supported in an operation position for pushing the lock member to the blocking release position by external operation, and either the rewind operation member or the lock release operation member is moved. One of the operating members is supported so as to be movable in the sliding direction parallel to the film pulling direction, and the other is supported so as to be movable in the pushing direction perpendicular to the sliding direction, and the operating portions of both operating members are arranged adjacent to each other. In addition, an electric film rewinding device for a camera, characterized in that an operating section that moves in a pushing direction is arranged on an extension line in a sliding direction of an operating section that moves in a sliding direction.