JPS6135437A - Driving device of camera - Google Patents

Abstract

PURPOSE:To improve the complexity of structure and complicate operability by providing an energizing means which engages a switching means for transmitting the driving force of the same motor selectively to a film winding or rewinding mechanism and a photographic lens moving mechanism with the film winding or rewinding mechanism. CONSTITUTION:Even when the motor M rotates in the 2nd direction through the operation of a switch SW1 based upon a pulse signal or the operation of a knob 66 to get ready to transmit the driving force to a gear 9, a stop lever 41 as a switching means is energized clockwise all the time by providing a tension spring 63 as an energizing means between the stop lever 41 and a control lever 61, so a stopper 46 engages a cam member 1 and is held at a stop attitude continuously. Therefore, the driving force of the motor M is transmitted to gears 8 and 7 through planetary gears 10a and 10b and then the film rewinding is started automatically soon to urge a user to replace the film.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a camera that can automatically advance and rewind a film, change the focal length of a photographic lens, or move the lens necessary for collapsing the lens. This relates to a drive device.

[Conventional technology]

Small cameras, especially compact cameras that use 35mm film (J135), are already on the market that not only automate exposure and distance adjustment, but also automatically wind and rewind the film using a built-in motor. Recently, however, a camera has been proposed that is equipped with a so-called bifocal lens, which allows the focal length of the photographic lens to be switched in two stages, long and short.

When switching the focal length of a bifocal lens, it is necessary to move the photographing lens in the direction of its optical axis in order to simultaneously attach and detach the focal length lens and keep the focal point on the film plane. In a camera equipped with a motor-driven bifocal lens, a drive mechanism is required that can arbitrarily switch the lens movement operation in addition to the above-mentioned film winding and rewinding operations using the same motor.

Several proposals have been made regarding this drive mechanism, but all of them have complicated structures and are complicated to operate, and it is difficult to obtain a means to automatically start rewinding the film when it is finished being used. At present, there is no perfect drive mechanism for a fully automatic camera.

[Problem that the invention seeks to solve]

The present invention aims to improve the structural complexity and cumbersome operability of the conventional camera drive mechanism for moving the lens, and also to realize the function of automatically starting film rewinding.

[Means for solving problems]

The present invention transmits the driving force to a film winding mechanism or a rewinding mechanism using a first planetary gear mechanism depending on the rotational direction of the motor, and further transmits the driving force to be transmitted to the rewinding mechanism to a second film rewinding mechanism. The system is configured such that the driving force of the same motor can be selectively transmitted to the lens moving mechanism by operating the planetary gear mechanism of the film winding or rewinding mechanism. A camera drive device having a switching means for transmitting information to a lens moving mechanism of a photographic lens, characterized in that a biasing means is provided for engaging the switching means with a film winding or rewinding mechanism. This is achieved by a drive device.

〔Example〕

FIG. 1 shows the main parts of the drive mechanism in the camera of the present invention.

Reference numeral 1 denotes a cam member located at approximately the middle position of the drive mechanism, which has a cylindrical shape with an open bottom and has an internal gear 2 formed at its lower end, while a gear 3 is integrally formed on its upper surface. is attached to.

The outer circumferential portion 1a of the cam member 1 has a curved surface 4a at its upper stage.
a notch 4 guided by the cam 5, a cam 5 guided by the slope 5a in the middle stage, and a 7 connected to the cam 5 in the lower stage.
A run-shaped cam 6 is formed, which is partially interrupted by a cutout 6a.

7 is a gear connected to a film rewinding mechanism (not shown), and its shaft 7a is fitted into the shaft hole 1c of the cam member 1 and integrated with the pongee 8a of the gear 8 located below the cam member 1. The cam member 1 and the gear 7.8 are coaxial and can freely rotate.

A gear 9 which is also coaxial and freely rotatable is provided below the gear 8, and a planetary gear Oa is connected to the internal gear 2 of the cam member 1; A planetary gear 10b, which meshes with the planetary gear 10a, meshes with the gear 8.

M is the motor that is the power source of this drive mechanism and its shaft.
A gear 21 attached to the second gear is configured to mesh with a gear 23 that is pivotally attached to a plate 22 that is loosely fitted to the shaft, and the gear 23 is oscillated depending on the direction of rotation of the motor M. A clutch is formed of a planetary gear mechanism that can be switched to move and transmit its driving force to either the left or right gear.

That is, 24 is a gear connected to a film winding mechanism (not shown), and 25 and 26 are intermediate gears for transmitting the driving force of the motor M to the gear 9 when the clutch is switched.

Reference numeral 31 denotes a gear for driving the lens moving mechanism.A planetary gear 32 is attached to the gear 31 by a shaft 32a, and a plate 33a having a pin 33 is fixed to the planetary gear 32 at a position corresponding to the score line. There is.

Further, the planetary gear 32 meshes with an internal gear 34 having a stepped circle diameter twice as large as that of the gear 31, which is formed on a member (not shown) fixedly installed separately from the gear 31. 31
When the planetary gear 32 makes a half rotation, the planetary gear 32 rotates and revolves, and the bin 33 moves linearly in the direction of arrow A by the diameter of the notched circle. The focal length of the lens can be changed.

On the other hand, on the side of the above-mentioned gear train, a stop lever 41 as a switching means for switching the driving force of the motor M to the film rewinding or lens moving mechanism in this drive mechanism is attached to the shaft of a support shaft 42. The stop lever 41 is provided to be rotatable about the hole 42a as a fulcrum, and the stop lever 41 is a regulating lever as a detection means that is provided on the same plane to be rotatable about the shaft hole 62g of the support shaft 62. The stopper 46, which is a first locking means provided at the other end, enters the notch 4 of the cam member 1. Its counterclockwise rotation is restricted.

On the second surface of the stop lever 41, a ratchet 51 serving as a second locking means is fitted with its shaft hole 51a loosely fitted onto the support shaft 42 of the stop lever 41, and is rotated counterclockwise by a torsion spring 47. Although the end portion 52 of the ratchet 51 comes into contact with the rising portion 48 of the stop lever 41 near the stopper 46 and is stopped, the stopper 46 is pressed against the notch portion 4 of the cam member 1. In the engaged state, the pawl 53 of the ratchet 51, which serves as a switching member for switching the driving force of the motor M from the rewinding mechanism to the lens moving mechanism, is separated from the tip of the tooth of the gear 7 and is not engaged. It is placed in a position that does not match.

On the other hand, the regulation lever 61 is composed of the following three functional parts.

That is, the regulation lever 61 and the stop lever 41
As described above, the tension spring 63 is stretched between the tension springs 63 and 63, but when the stopper 46 of the stop lever 41 is engaged with the notch 4 of the cam member 1, the regulating surface 64 of the stopper 46 is suspended as shown in the figure. The regulating lever 61 is prevented from rotating counterclockwise by coming into contact with an arc-shaped stepped portion 49 centered on the shaft hole 42a of the stop lever 41. Therefore, as a first function, the front end 65 uses the side surface 73 to prevent the rotation of the switch mounting plate 71, which is biased clockwise around the shaft hole 71a by the action of the tension spring 72. Since this is prevented by stopping the switch 5llll, the switch 5llll is kept open.

The second function is to rotate the regulating lever 61 clockwise with a knob 66, which is a rewind operation member attached to the rear end of the regulating lever 61 and protruding from the camera exterior. 65 has the function of allowing the switch mounting plate 71 to rotate counterclockwise to close the switch 5l111.

Further, as a third function, when the stop lever 41 is forcibly rotated counterclockwise by the action of a member described later and the stopper 46 is separated from the outer peripheral part 1a of the cam member 1, the stop lever 41 is rotated at that angle. The regulating surface 64 of the regulating lever 61 is disengaged from the stepped portion 49 of the stop lever 41 and can be rotated counterclockwise to take a position to prevent the stop lever 41 from returning clockwise.

Reference numeral 81 denotes a sliding plate as a lens movement operation member disposed on the same plane as the switch mounting plate 71, and the tension spring 8 is activated by operating a knob 83 protruding from the camera exterior.
2, and which is rotatable about a support shaft 85, is regulated by a pin 84, so that the punch 86 can be rotated clockwise. The stop lever 41 can be rotated counterclockwise by its tip 86a.

The sliding plate 81 is provided with a cam 81a that receives the contact portion 71b of the switch mounting plate 71, and when the sliding plate 81 is slid diagonally upward and to the right by operating the knob 83, the The contact portion 71b is locked by the cam 81a, and the clockwise rotation of the switch mounting plate 71 is temporarily prevented.

Next, the operation of this drive device will be explained.

FIG. 1 shows a state in which the motor M rotates 81 times in the first direction in order to wind a new film after film rewinding has been completed, that is, the gear 21 rotates clockwise. Therefore, the gear 23 meshes with the gear 24 connected to the film winding mechanism to transmit the driving force of the motor M to the film winding mechanism.

Here, film rewinding is performed as follows.

When a predetermined number of frames have been photographed with one film and the film winding is further advanced and the final winding amount is less than one frame and the motor M stops, the camera of the present invention sends a message to the control unit. As a result, the prescribed pulse waveform is not sent, and the control unit detects this and controls the motor M to rotate in the second direction, that is, the gear 21 starts rotating counterclockwise.

Therefore, the gear 23 meshes with the intermediate gear 25 and further rotates the gear 9 counterclockwise via the intermediate gear 26.

In this case, the cam member 1 has a planetary gear 10 on the gear 9.
a causes the planetary gear 10a to rotate counterclockwise, but is stopped by the stopper 46 of the stop lever 41, so the planetary gear 10a starts to rotate clockwise at the same time as it revolves. The gear 7 connected to the film rewinding mechanism is rotated by the difference between the counterclockwise revolution and the rotation of the planetary gear Ob.

In this way, the film automatically starts rewinding when shooting is completed and is stored in the cartridge again, achieving what is called an auto-return of the film.On the other hand, if necessary, the film can be manually rewound to leave unshot scenes. It is possible to switch to rewind.

That is, when the knob 66 is pressed to the right, the control lever 61 is rotated clockwise, and the switch mounting plate 71 is rotated counterclockwise to close the switch 5llllll, film winding is performed. Even in this case, a circuit for reversing the motor M is formed so that the gear 7 can be driven to rewind the film in the same manner as in the case of the auto-return described above.

In addition, when driving the lens moving mechanism, the sliding plate 8
1 to the upper right diagonally with the knob 83, the punch 86 rotates clockwise and its tip 86a presses the switching pin 43 of the stop lever 41 to the right, causing the stop lever 41 to move. Rotate counterclockwise.

As a result, first of all, the stopper 46 of the stop lever 41 moves away from the outer circumferential portion 1a of the cam member 1 to release the locking relationship with the cam member 1.

At the same time, the ratchet 51 rotates the stop lever 41.
The torsion spring 4 is released due to the rising portion 48 of the torsion spring 4.
7, the claw 53 follows in the counterclockwise direction and assumes a position in which the claw 53 engages or engages with the tooth surface of the gear 7.

Next, in the regulation lever 61, its regulation surface 64
is removed from the step 49 of the stop lever 41, so it rotates counterclockwise under the action of the tension spring 63, and its end 65 retracts to the right, causing the switch mounting plate 71 to rotate clockwise under the action of the tension spring 72. Try to rotate in the direction.

However, when the sliding plate 81 is slid diagonally upward and to the right, the contact portion 71b of the switch mounting plate 71 is in a position where it is blocked by the cam 81a of the sliding plate 81, so the switch Mounting plate 71 does not rotate, so switch SWI remains open.

Next, when the knob 83 is released, the sliding plate 81 and the mallet 86 attempt to return to the illustrated positions, but the stop lever 41 has already been removed from the stepped portion 49 of the regulating lever 61 prior to this. It is placed in a state where its return is prevented by the restriction surface 64, and the restriction lever 6
1 itself is also in a state where it cannot return to the illustrated position due to engagement with the stop lever 41.

Therefore, when the sliding plate 81 has returned to its original position, the switch mounting plate 71 rotates clockwise to close the switch 5llll, forming a circuit that reverses the motor M, and the driving force of the motor M is transmitted through the intermediate gears 25 and 26. and is transmitted to the gear 9.

In this case, since the gear 7 connected to the film rewinding mechanism is already locked by the ratchet 51, the cam member 1 is moved counterclockwise due to the difference between the revolution and rotation of the planetary gear 10a on the gear 9. It is set to rotate.

, when the cam member 1 starts rotating, the lower cam 6 switches to a switch S-2 connected in parallel with the switch S old.
Then, the middle slope 5a pushes up the regulation bottle 67 of the regulation lever 61 and rotates the regulation lever 61 slightly clockwise, so that the regulation surface 64 touches the stepped portion 49 of the stop lever 41. They will be in contact again.

Therefore, the stop lever 41 is rotated clockwise by the action of the tension spring 63, but since the cam member 1 has already rotated at that point, the stopper 46 of the stop lever 41 is rotated clockwise by the action of the tension spring 63. outer periphery 1
a, and will not engage with the notch 4 of the cam member 1 again.

Further, when the regulating lever 61 returns, the switch mounting plate 71 also returns, and the switch 5l111 is opened again. However, since the switch 5ll12 remains closed by the cam 6, the driving force of the motor M is The signal is continuously transmitted to the cam member 1.

When the cam member 1 driven by the motor M reaches approximately one rotation, the switch 5III2 falls into the notch 6a of the cam 6 and opens, stopping the drive of the motor M. Gear 3 while
rotates the gear 31 by half a rotation via the intermediate gear 35, and as described above, the planetary gear 32 revolves and rotates on its own axis, and the pin 33 provided on the planetary gear 32 is moved linearly in the direction of arrow A. , thereby driving the lens moving mechanism.

In this case, the stop lever 41's 7th pawl 46 is
The operation timing of the switch SW2 is set so that the switch SW2 stops at a position where the cam member 1 does not reach the curved surface 4a but comes into sliding contact with the outer peripheral portion 1a of the cam member 1, thereby maintaining the locked state of the gear 7 by the pawl 53. It remains as it is.

In other words, the focal length of the photographic lens has been changed, but in order to return it to the original focal length, it is only necessary to operate the knob 83 again and repeat the same operation.

When the cam member 1 opens the switch 5llI2 and stops, it is inevitable that the stop position will move slightly back and forth due to inertia, etc., and when the film is rewound again, the stopper 46 of the stop lever 41 will be moved back and forth by the cam member. Until the cam member 1 engages with the notch 4 of the pin 1, the cam member 1 rotates and causes unnecessary operation to the lens moving mechanism. By configuring the lens moving member so that power is transmitted through the elastic member, it is possible to move the lens without any trouble.

As is clear from the above explanation, even when the motor M is rotated in the second direction by the above-mentioned pulse signal or the action of the switch 5iIII by the operation of the knob 66, and the driving force is transmitted to the gear 9, , in the present invention, the stop lever 41 as a switching means
A tension spring 6 serving as a biasing means is provided between the regulating lever 61 and the regulating lever 61.
Since the stop lever 41 is always biased clockwise by providing the stopper 46, the stopper 46 continues to maintain the integral force 15 which engages and stops the cam member 1.

Therefore, as described above, when the driving force of the motor M transmitted to the gear 9 is transmitted to the gears 8 and 7 via the planetary gears 10a and 10b, film rewinding is automatically started, prompting the user to replace the film. It is supposed to be a reminder.

Note that in the drive mechanism described above, it is also possible to configure the film winding mechanism and the rewinding mechanism by swapping their positions, so in that case, the gear 7 would be connected to the film winding mechanism, and the stop The film is wound up by the engagement of the lever 41 with the cam member 1. At this time, the tension spring 6 is also used as a biasing means.
3 is in operation, the stop lever 4 always locks the cam member 1, and is effective in immediately transmitting the driving force of the motor M to the film winding mechanism.

〔Effect of the invention〕

The present invention rationally realizes the automation of film winding, rewinding, and lens movement in a small camera using an extremely simple device.It also makes it possible to automatically start 7-film rewinding, making it suitable for beginners. A fully automatic camera drive device that is extremely easy to use has now been provided.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a camera drive mechanism according to the present invention. 1... Cam member 2, 34... Internal gear 3.
...(For cam member) Gear 4...Notch part 5.6...
Cam 7... (for rewinding) gears 10a, 10
b, 23.32...@Star gear 41...Stop lever 43...Switching bin 46...Stopper
49...Stepped portion 51...Ratchet 53...
・Claw 61...Regulation lever 64...Regulation surface 6
5... End 66.83... Knob 67
...Restriction pin 71...Switch mounting plate 8
1... Sliding plate 86... Stacking rod M... Motor 51111, 5III 2... Switch agent Patent attorney No. 1) Step-parent procedure amendment February 1, 1985 1, Case display Showa 1959 Patent Application No. 158459 2 Name of the invention Camera drive device 3 Relationship with the amended person case Patent applicant address 1-26-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Contact address Hino City, Tokyo 191 Japan Sakuracho 1 Konishiroku Photo Industry Co., Ltd. (Telephone 0425-83-15)
21) Patent Part 4, Date of amendment order Voluntary (2) Figure 1 of the drawings is amended as shown in the attached sheet. 5. The "Detailed Description of the Invention" column of the specification to be amended and the drawings. 6. Contents of amendment (1) The text from page 5, line 16 to page 6, line 7 of the specification is corrected as follows. 30 shows a planetary gear mechanism that drives the lens, 31 is a gear that transmits power to the planetary gear mechanism 30, and a planetary gear 32 with a pin 33 at a position corresponding to the notched line is rotated on top of the gear. The planetary gear 32 is movably attached to the shaft, and on the other hand, the planetary gear 32 also meshes with an internal gear 34 having a stepped circle diameter twice that of the planetary gear 32 and fixedly attached to the camera body.
1 is rotated by half a rotation by the power from the camera body, the planetary gear 32 revolves around the internal gear 34 and rotates half a revolution, and at the same time rotates itself half a rotation, so that the arrow points to the bin 33. It is designed to provide a linear movement in the A direction for a distance corresponding to the notched circle diameter of the internal gear 34. As a result, the lens barrel connected to the bin 33 moves in the optical axis direction to change the focal length. ”

Claims (1)

[Claims] (1) In a camera drive device having a switching means for selectively transmitting the driving force of the same motor to a film transport mechanism and a lens movement mechanism of a photographic lens using a planetary gear mechanism, the switching means is used to transfer the film A camera drive device, characterized in that it is provided with a biasing means for engaging a mechanism.