JPS6227724A - Camera electric feeding device - Google Patents

Abstract

PURPOSE:To prevent wrong switching during rewinding to eliminate the damage or the like of a film by controlling switching of a planetary clutch during rewinding by an epicyclic switching control member which is coupled by friction to a rotating wheel which is rotated with the film during rewinding. CONSTITUTION:A weak elastic force is applied to a planetary switching control member 40 in the direction of the center to form a coupling part 41 coupled to a revolving shaft 6c by friction and a control part 42 whose one end is extended linearly. When a planetary clutch mechanism 10 is switched to a high speed winding transmission system and rewinding is performed in this state, a spool 5 is rotated counterclockwise by a film 20 and the second transmission gear 6 is rotated clockwise. If the rewinding speed is varied, the control part 42 of the planetary switching control member 49 is brought into contact with a contacting edge 32a of a notch 32 of a planetary lever 30 to stop the planetary lever 30 from shaking counterclockwise furthermore, and therefore, the planetary clutch mechanism 10 is set to the neutral state to prevent switching to a low speed winding transmission system.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electric feeding device for a camera that electrically feeds a motor for winding and rewinding a film.

(Prior Art) In the past, various cameras have been proposed that use motors to advance and rewind film electrically, but there is always a problem in the design of this type of mechanism: film winding. This is the setting of the transmission gear ratio of the feeding system.

Specifically, if the setting emphasizes the output of the motor, the frame speed will increase, but the number of films to be fed will decrease.

On the other hand, if efficiency is prioritized, the opposite problem will occur.

Therefore, as an improvement to the above point, a planetary clutch mechanism is interposed in the hoisting transmission system to form a transmission system with two transmission systems with different reduction ratios, and the transmission gear ratio can be changed by switching between forward and reverse rotation of the motor. The present applicant has proposed a system in which the speed of the frame and the number of sheets to be fed, which are contradictory to each other, can be achieved.

In the above-mentioned improved companion system, the winding motor is a mechanism that winds the film once in both forward and reverse rotations, so if rewinding is also performed by electric feeding, a separate motor is installed for rewinding. It is preferable to set

In this way, when a planetary clutch mechanism is arranged in the film winding transmission system to drive two winding transmission systems, and when performing Vi1 rewinding in an electric feeding device that has a rewinding transmission system tS separately, It is desirable to have the planetary gears of the planetary clutch mechanism in the hoisting transmission system in a neutral state (both are in a non-meshing state), but the planetary clutch mechanism? This is actually difficult because of the way it is used. Therefore, in order to reduce the load on the unwinding motor when unwinding, it is preferable to switch the planetary clutch mechanism of the first hoisting transmission system to a transmission system for high speed hoisting with a small reduction ratio. If rewinding can be completed with the hoisting transmission system meshed with the high-speed transmission system as described above, the load on the rewinding motor will not be excessive, but in reality During the return, the planetary clutch mechanism may be switched to the other lower speed hoisting transmission system with a larger reduction ratio. In other words, when performing IT rewinding with the planetary clutch mechanism engaged with the hoisting transmission system on the high-speed side,
A winding wheel (for example, a spool) is rotated by the film in the opposite direction to the winding direction, while the first winding motor is rotated in the opposite direction to the high speed winding direction, and RItC is rotated in the slow winding direction. Because of this, the hoisting motor works like a flywheel, and if the rewinding speed changes due to load fluctuations during unwinding, the hoisting motor will stop working as soon as the rewinding speed decreases. rotation exceeds the rewinding speed, and the planetary clutch mechanism is switched to the lower speed hoisting transmission system. As a result, a sudden load is generated during rewinding, resulting in damage to the perforations of the film and problems with the film itself being cut.

In addition to the above-mentioned method of installing two transmission systems with different reduction ratios in the hoisting transmission system, it is also possible to interpose a planetary clutch mechanism in the hoisting transmission system to create a two-series hoisting transmission system. In this configuration, there is a problem that the winding transmission system is switched during one unwinding.

(Object of the Invention) The present invention solves the above-mentioned conventional problems, and provides an electric camera feeding device that can prevent unauthorized switching of the planetary clutch mechanism during rewinding and does not cause damage to the film. purpose.

In order to achieve the above-mentioned objects, the present invention has a feeding device equipped with a planetary clutch mechanism and capable of switching between two different winding transmission systems. The present invention is characterized by an electric feeding device for a camera that is frictionally coupled to a vehicle and constitutes a planetary switching regulating member, which regulates switching of a planetary clutch mechanism during rewinding.

(Example) FIG. 1 shows an electric feeding device for a camera, which is the premise of the present invention. l is sprocket gear.

2 is a tin rocket, which is coaxial with the sprocket gear 1 and connected with a known mechanism, such as the tightening action of a coil spring. When rotating clockwise, the rotational speed of sprocket 2 is higher than that of sprocket gear 1.
It is set so that the connection between the two is released when the vehicle overtakes the vehicle. 3 is a first transmission gear, which is a two-stage gear in which a large gear 3a and a small gear 3b are formed. The small gear 3b meshes with the sprocket gear I. 4
5 is a spool gear, and 5 is a spool, which rotates together with the spool gear 4. 6 is a second transmission gear, which is a two-stage gear 't'4N in which a large gear 6a and a small gear 6b are formed.
Ix, the small gear 6b meshes with the spool gear 4.

Reference numeral 10 denotes a planetary clutch mechanism, which is composed of a sun gear 12°, planetary gears 14 and 16, and a planetary lever 18. The sun gear 12 is directly connected to the output shaft of a hoisting motor capable of forward and reverse rotation, or the rotation of the output shaft is transmitted via a transmission gear train. Planetary gear 14.16 is planetary lever 1
8, and are each meshed with a sun gear 12. The planetary lever 18 is supported so as to be able to swing about the center of rotation of the sun gear 12, is frictionally connected to the gear 12, and is set to swing in accordance with the rotational direction of the sun gear 12. There is. That is, when the sun gear 12 rotates clockwise as shown in FIG. 1(a), the planet lever 18 also swings clockwise, the planet gear 14 and spool gear 4 mesh, and the rotation of the hoisting motor is Sun gear 12→
A high-speed winding transmission system with a small reduction ratio, which is transmitted from the planetary gear 14 to the Subur gear 4 to the spool 5, is obtained. on the other hand,
As shown in FIG. 1(b), when the sun gear 12 rotates counterclockwise, the planetary lever 18 also swings counterclockwise, and the planetary gear 14 meshes with the large gear 3a of the first transmission gear 3. , the planetary gear 16 meshes with the large gear 6a of the second transmission gear 6. Therefore, a low-speed hoisting transmission system with a large reduction ratio is obtained in which the rotation of the hoisting motor is transmitted as follows: sun gear 12 → planet gear 16 → second transmission gear 6 → spool gear 4 → spool 5. In this case, sun gear 12 → planet gear 14
It is transmitted as follows: -> first transmission gear 3 -> sprocket gear 1 -> sprocket 2, and winding is performed at the sprocket 2 simultaneously with the winding at the spool 5. Note that in the case of this low-speed hoisting transmission system, the circumferential speeds of the spool 5 and the sprocket 2 are set to be slightly higher for the spool 5. Therefore, when the leading end of the film 20 is at the position of the sprocket 5 during autoloading, the sprocket 2 is rotated by the rotational force of the sun gear 12 and the film 20 is
1- When the film 20 is fed in the direction of the spool 5 and wound around the spool 5, the rotational speed of the sprocket 2 rotated by the film 20 is higher than the rotational speed L of the sprocket gear l connected with the one-way clutch. Since the speed increases, the clutch is not disengaged and the film 20 is essentially wound up only by the spool 5.

When rewinding is performed using a separate rewinding motor in such a feeding device, if the rewinding is performed using the low speed side hoisting transmission system shown in Fig. 1(b), the hoisting transmission system including the spool 5, etc. is film 2
0, it will be rotated in the counter-winding direction,
Since this transmission system has a large reduction ratio, the load is large, and the load on the rewinding motor becomes large.Furthermore, this large load acts between the perforations of the film 20 and the sprocket 2, causing the perforations to break. Problems may also occur.

In order to solve the above-mentioned problem, it is sufficient to carry out the complete rewinding while the hoisting transmission system is set to the high-speed hoisting transmission system as shown in FIG. 1(a). however.

The sun gear 12 moves counterclockwise in the unwinding state, that is, in the low speed winding direction during winding.If the unwinding speed becomes uneven during unwinding, the inertia of the first winding motor causes a rainbow planet. The lever 18 swings counterclockwise, and the transmission system is switched to the low-speed hoisting transmission system. Therefore, the above-mentioned problem occurs.

FIG. 2 shows an embodiment of the present invention, and this embodiment will be explained below. In the configuration of FIG. 2, the same components as those in FIG.

The characteristic configuration of this embodiment is that a notch 32 is formed at the end of the planetary lever 30 on the planetary gear 16 side, and the planetary lever 30 is fictitiously connected to the rotating shaft 6c integral with the second transmission gear 6. Switching regulation member 40? This is what we have configured.

The planetary switching regulating member 40 is formed by bending a bar material, and is designed so that an elastic force is applied in the direction of the center. A regulating portion 42 extending linearly is formed. Therefore, when the second transmission gear 6 rotates clockwise, this member 40 similarly swings clockwise and enters the notch 32 of the planetary lever 30, and conversely, when the gear 6 rotates counterclockwise, the member 40 swings clockwise and enters the notch 32 of the planetary lever 30. , similarly swings counterclockwise and reaches the stopper 50 position.

FIG. 2(a) shows a state in which the planetary clutch mechanism 10 is performing rewinding at a position where it is switched to the high-speed hoisting transmission system. In this state, the spool 5 is rotated counterclockwise by the film 20, which in turn causes the second transmission gear 6 to rotate clockwise. Therefore, the planetary switching regulating member 40 also swings clockwise, and the regulating portion 4
2 is inserted into the notch 32 of the planetary lever 30.

In this state, if the rewinding speed becomes uneven, the planetary lever 30 will swing counterclockwise due to the inertia of the hoisting motor as shown in FIG. The regulating portion 42 of the regulating member 40 comes into contact with the abutting edge 32m of the notch 32 of the planetary lever 30 and restricts further counterclockwise rocking of the planetary lever 30, so that the planetary clutch mechanism 10 is in a neutral state, and switching to the lower speed hoisting transmission system is prevented. As a result, the problem with the rewinding mechanism shown in FIG. 1 can be solved without increasing the load during one rewind.

Here, when the rewinding of the film 20 is completed, the leading end of the film 20 comes off the spool 5, so the spool 5 becomes free), and the second transmission wheel 6 also stops rotating.

Here, in order to move the regulating part 42 of the planetary switching regulating member 40 from the notch 32 of the planetary lever 3o, the hoisting motor is rotated for a short time in the high-speed winding direction, and the sun gear 12
It is sufficient to rotate the planetary lever 30i clockwise by rotating the planetary lever 30i clockwise, rotate the spool 5 clockwise (winding direction), and rotate the second transmission gear 6 counterclockwise.

In addition, the planetary clutch mechanism 10 can be switched to either the high speed side or the low speed side.

In addition, in the above-mentioned implementation, the transmission system for the hoisting amount was explained as having two transmission systems with different reduction ratios, but the present invention can transmit the hoisting amount even if the reduction ratios are not particularly different. In an apparatus in which two transmission systems can be switched by a planetary clutch mechanism, the same effects as in this embodiment can be obtained in an apparatus in which the transmission system suitable for rewinding is selected.

(Effects of the Invention) As explained above, the present invention provides a planetary clutch mechanism during one rewind in a feeding device that is equipped with a planetary clutch mechanism and is capable of switching between two different hoisting transmission systems. An object of the present invention is to provide an electric camera feeding device that can prevent problems such as film damage by preventing unauthorized switching.

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) are plan views showing an electric feeding device for a camera, which is the premise of the present invention. FIGS. 2(a) and 2(b) are plan views showing an electric feeding device for a camera as an embodiment of the present invention. 2... Sprocket, 5... Spool, 6... Second transmission gear (rotary wheel rotated by the film), lO... Planetary clutch mechanism, 12... Sun gear. 14-16... Planetary gear, 30... Planetary lever, 3
2... Notch, 40... Planetary switching regulation member.

Claims (1)

[Claims] (1) In a camera electric feeding device that can switch and transmit the output rotation of a winding motor to two different winding transmission systems via a planetary clutch mechanism, the film is used when rewinding the film. A planetary switching regulating member is frictionally coupled to a rotating wheel that is rotated by the rotating wheel, and the regulating member is configured to come into contact with the planetary clutch mechanism when the rotating wheel rotates in the film rewinding direction. An electric feeding device for a camera, characterized in that transmission switching of a planetary clutch mechanism during film rewinding is regulated.