JPS6136988Y2 - - Google Patents

Description

[Detailed description of the invention] The invention has a revolving bag that is attached to the outside of the camera body so as to be able to rotate by 90 degrees and to which a roll film holder is attached. The present invention relates to an improvement in a film winding device capable of winding a film.

In such conventional film winding devices, in order to retract the portion of the drive shaft for the winding shaft of the film holder that causes relative movement accompanying this rotation in order to rotate the revolving bag, it is necessary to The removal must be in a specific state, such as when it is completed, and there are restrictions such as not being able to increase the number of revolutions of the drive shaft. By increasing the rotational speed of this drive shaft, the torque of this drive shaft can be reduced, and therefore the rigidity of parts can be reduced, and strong friction applied to bearings and the like can be eliminated. However, in the conventional device described above, when the number of rotations is increased, a force is generated to rotate the revolver bag, so the number of rotations cannot be increased.

The present invention eliminates the drawbacks of the conventional ones described above, allows the revolving bag to rotate regardless of the winding state, and furthermore,
The purpose of this device is to provide a film winding device that can stably stop the revolution bag in a vertical or horizontal position even when the number of rotations of the drive shaft is increased. a drive lever for moving the film into and out of contact with the film winding shaft;
a spring that urges the drive shafts in the direction of connecting them to the film take-up shaft; a cam that presses against the drive lever and moves the drive shafts forward and backward; and a cam that presses against the cam so that the film holder is in the vertical position. Alternatively, the bag is provided with a lock mechanism that restricts rotation of the revolving bag when it is in the horizontal position.

The present invention will be explained below with reference to embodiments shown in the drawings.

In FIG. 1, a frame-shaped revolving bag 2 is attached to a camera body 1 so as to be able to rotate approximately 90 degrees, and a roll film holder 3 is detachably attached to this revolving bag 2. There is.

Inside the camera body 1 are a pair of drive shafts 4 and 5.
is arranged, and depending on the switching of the revolving bag 2 between the vertical and horizontal positions, either one of the drive shafts 4 or 5 serves as a connecting shaft between the film winding shaft 6 in the roll film holder 3 and the revolving bag 2. It is designed to be connected via 7.
The drive shafts 4 and 5 are rotated by operating a winding lever (not shown), and rotate the film winding shaft 6 to wind up a roll film (not shown). In addition, both the drive shafts 4 and 5
are supported via splines so as to be movable in the axial direction, and can be retracted and retracted from openings 8 and 9 formed in the surface of the camera body 1 to which the revolving bag 2 is attached. When these drive shafts 4 and 5 protrude from the openings 8 and 9, they connect to the connection shaft 7 of the revolving bag 2.
It is becoming connected to The connecting shaft 7 is rotatably attached to the revolving bag 2, and is connected to the winding shaft 6 of the film holder 3 when the film holder 3 is attached to the bag 2.

Each of the drive shafts 4 and 5 has a large diameter portion 1.
0, 11 and flanges 12, 13 spaced apart from the large diameter portions 10, 11, these large diameter portions 10, 11 and the flanges 12, 13
One ends of drive levers 14 and 15 are fitted between them. These levers 14 and 15 are rotatably supported at their center portions by support shafts 16 and 17, and are provided in grooves 18 formed at the ends of the levers 15 that protrude from the ends of the levers 14. Both levers 14 and 1 are connected by fitting the pin 19
5 rotates synchronously. One end of a tension spring 20 is attached to the pin 19, and the other end of the tension spring 20 is attached to a fixed part (not shown), and the levers 14, 15 are moved in the clockwise direction in which the drive shafts 4, 5 protrude. It is becoming more and more popular.

An arm 21 that projects at right angles is provided at the center of the lever 14, and this arm 21 is pressed against a cam 22 disposed near the arm 21 by the action of the spring 20. . This cam 22 is rotated when the revolving bag 2 is switched between the vertical and horizontal positions, and a part of the disc 23 is shaved off in a straight line, forming an arcuate part 24 and a straight part 25. Consisting of When the arm 21 comes into pressure contact with the linear portion 25 of the cam 22, both the drive shafts 4 and 5 sink into the openings 8 and 9, and when the arm 21 comes into pressure contact with the arcuate portion 24 of the cam 22,
Both drive shafts protrude from the openings 8, 9, and one of the drive shafts 4 or 5 is connected to the connecting shaft 7 of the revolving bag 2.

A lock pin 26 is also pressed against the cam 22 by a spring 27. This lock pin 26
can protrude to the outside from a small hole 28 formed in the camera body 1, and when the revolving bag 2 is in an accurate vertical or horizontal position, a hole 29 formed in the bag 2 (only one is shown)
The revolving bag 2 is fitted inside to prevent rotation of the revolving bag 2. Note that the locking action described above is only performed when the lock pin 26 is in pressure contact with the circular arc portion 24 of the cam 22, and when the lock pin 26 is in pressure contact with the straight portion 25 of the cam 22, the tip of this lock pin 26 is adapted to be sunk into the small hole 28 of the camera body 1.

Next, the operation of the above-described embodiment will be explained.

FIG. 1 shows a state where the rotation of the revolving bag 2 is prevented by the lock pin 26, and in this state, one drive shaft 4 is connected to the connecting shaft 7 of the revolving bag 2, and the rotation of the drive shaft 4 is prevented. is transmitted to the film take-up shaft 6 of the roll film holder 3.

When it is desired to switch the vertical or horizontal position of the roll film holder 3, the arcuate portion 2
4, the lock pin 26 is pressed against the straight part 25, the arm 21 is rotated approximately 90 degrees, and the arm 21 is pressed against the arc part 24, and the straight part 25 is pressed against the arm 25.
The lock pins 26 are pressed against each other. Then, as shown in FIG.
9, the revolving bag 2 can now rotate relative to the camera body 1, and both levers 14 and 15 are rotated clockwise against the spring 20, and both drive shafts 4 and 5 are rotated. It sinks into the openings 8 and 9, and the connection between the drive shaft 4 and the connection shaft 7 is released. Therefore, by rotating the revolving bag 2 by 90 degrees with respect to the camera body 1 and rotating the cam 22 by 90 degrees in the opposite direction, the drive shaft 5 is now connected to the connecting shaft 7. Note that if the revolving bag 2 has not completely rotated 90 degrees at this time, the lock pin 26 will not be able to enter the hole 29 of the revolving bag 2, and the cam 22 will not be able to rotate. 2. Accurate positioning is possible.

As described above, the film winding device according to the present invention includes a cam that separates the drive shaft from the film winding of the film holder when the revolving bag rotates, and a cam that moves the revolving bag in the vertical and horizontal positions by operating this cam. Since it has a lock mechanism that restricts rotation, the revolving bag can be rotated regardless of the winding state, and even if the number of rotations of the drive shaft is increased, the revolving bag remains stable in the fixed position. This has the excellent effect of being able to stop the vehicle at a specific time.

In the above-mentioned embodiment, a cam, a lever, etc. were provided on the camera body side, but a spline is formed on the connecting shaft of the revolving bag so that it can move forward and backward, and it is also locked in conjunction with this forward and backward movement. You can also do it.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the film winding device according to the present invention, and FIG. 2 is a longitudinal sectional view showing a state in which the lock shown in FIG. 1 is released. 1... Camera body, 2... Revolving bag, 3... Roll film holder, 4, 5... Drive shaft, 6... Film winding shaft, 14, 15...
Drive lever, 20... Spring, 21... Arm, 2
2...cam, 24...circular part, 25...straight line part,
26...Lock pin.

Claims (1)

[Scope of utility model registration request] a revolving bag mounted on the outside of the camera body so as to be able to rotate by 90 degrees and to which a roll film holder is attached; a revolving bag connected to the film winding shaft of the holder when the film holder is in the vertical position and in the horizontal position, respectively; The device includes a pair of drive shafts for transmitting a film winding operation to the film winding shaft, and a drive lever for bringing the two drive shafts and the film winding shaft into and out of contact with each other, and a drive lever for moving the two drive shafts toward and from the film winding shaft. a spring biased in the direction of connection to the take-up shaft; and a spring in pressure contact with the drive lever;
A film characterized in that it has a cam that moves the drive shafts forward and backward, and a lock mechanism that is in pressure contact with the cam and restrains rotation of the revolving bag when the film holder is in a vertical or horizontal position. Winding device.