JPS6238434A - Camera - Google Patents

Abstract

PURPOSE:To prevent another power transmission system from the impression of harmful motion due to the inertia or the like of gears by switching a power transmission system under the stopped state of the gears and then driving power transmission. CONSTITUTION:When a gear 3 is rotated in the counterclockwise direction by the rotation of a motor, a lever 4 is rotated in the counterclockwise direction by the friction and inertia of a rotary shaft part and a gear 5 transmits the rotation to a gear 6 connected to a film winding mechanism. When the gear 3 is rotated in the clockwise direction, the gear 5 transmits the rotation to a gear 7 connected to a film rewinding mechanism. When the motor is rotated in the counterclockwise direction, the gear 5 rotates in the counterclockwise direction to wind up only an exposed picture and the rotation is not transmitted to the gears 7, 16. When the rotation of the motor is switched to the clockwise direction, the 1st and 2nd clatches are driven and a state in which the rotation can be transmitted to the gears 7, 16 is attained.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a camera that can be driven by a single motor that incorporates film winding, rewinding, and other camera operations.

[Conventional technology]

Recent small cameras, especially compact cameras, are increasingly automating camera operations following the automation of exposure and focus adjustment.Currently, cameras are equipped with a small, high-performance motor built into the camera, from film winding to film winding. Cameras have now been provided that can automatically return the shutter and set the shutter simply by operating a switch. Up to this stage of camera automation, it is sufficient to have two drive systems that operate by constantly switching the motor to forward or reverse rotation, and the mechanism is relatively simple and easy to operate. This makes it possible to organize them into a structure that does not pose any risk of erroneous operation.

[Problems to be solved by the invention]

However, when such a camera is added with a function other than film transport, such as lens movement for focal length switching, and this operation is also driven by the aforementioned motor, one of the drive systems is Since the drive mechanism and its switching mechanism are complicated, the cost of the camera increases, and the operation of the camera is also complicated, making it prone to operational errors. The object of the present invention is to solve this problem and improve the camera, thereby providing a camera that can switch and transmit the driving force of the motor to three drive systems using a simple mechanism.

[Means for solving the problem] The above object is to engage a rotating body directly connected to a motor with a first clutch and a second clutch that switch the power transmission system depending on the rotational direction of the motor, and The film winding mechanism and the film rewinding mechanism are selectively engaged, the second clutch is selectively engaged with a mechanism for performing operations other than winding and rewinding, and the first and second clutches are selectively engaged. A regulating means for regulating the operation of the first clutch is provided, and the regulating means is displaced to a position for regulating the operation of the first clutch and a position for regulating the operation of the second clutch by an operating member for performing the other operation. This is achieved by a camera characterized in that the regulating means is locked by a releasable locking member. Embodiment An embodiment of the present invention is shown in FIGS. 1 to 3. The figures are all exploded views of the power transmission system of the camera of the present invention, which is installed on the bottom or top of the camera body.
For convenience, the gears that drive the lens movement for switching the focal length of the bifocal lens, the film winding and rewinding mechanisms, and the gears connected to these are shown in the circles corresponding to the ticking circles as operations other than film transport. The circumference is shown in the figure. In FIG. 1, 1 is a gear fixed to the shaft of a motor (not shown) which is a drive source that supplies power to the power transmission system described above, and 3 is rotated in the same direction by gear 1 via gear 2. A gear 5, which is a rotating body, is pivotally attached to a lever 4 that is rotatable around the rotation axis of the tooth $3, and the tooth 1t is rotatable.
13, and constitutes a first clutch whose position can be rotated to either the left or right depending on the direction of rotation of the gear 3. That is, when the gear 3 is rotated counterclockwise by the rotation of the motor, the lever 4 is rotated counterclockwise from the state shown in Fig. PIfJ1 due to the friction and inertia of the rotating shaft portion, and the gear 5 is rotated counterclockwise. If the gear 3 is rotated clockwise, the gear 5 transmits the rotation to the gear 7 connected to the film rewind mechanism as shown in FIG. It becomes the state to transmit. 13 is a gear connected to the gear 3 via gears 11 and 12 and rotated in the opposite direction to the gear 13; 15 is the gear 13;
A gear that is pivotally attached to a lever 14 that is rotatable around the rotation axis of the lever 14 and that is always in mesh with the gear 13,
When the gear 3 rotates clockwise, the tooth 13 rotates counterclockwise, and the gear 15 moves counterclockwise from the state shown in FIG. 1 due to the friction and inertia of its rotating shaft. A second clutch is constituted by meshing with a gear 16 connected to a mechanism for other force operations other than film transport, that is, lens movement. That is, when the motor rotates counterclockwise, the gear 6 rotates counterclockwise to wind up the exposed screen, and does not transmit rotation to the gear 7 and gear 16.
When the rotation of the motor is switched clockwise, the first and second clutches described above operate, and the gears 7 and 16 are activated.
It becomes possible to transmit rotation to. Reference numeral 21 denotes the aforementioned $1, a sliding plate A serving as a regulating means for regulating the operation of the second clutch, and 24 a sliding plate B serving as an operating member for displacing the sliding plate A21 to a regulating position. Each of them is biased to the right by tension springs 20 and 25, and each is mounted and supported so that it can move to the left along a pair of elongated holes 21a*24a. Further, the lower protrusion 21b of the sliding plate A21 comes into contact with a pin 14a attached to the tip of the lever 14, restrains the lever 14 between it and the stop pin 28, and separates the gear 15 from the gear 16. It works to keep it in that position. Furthermore, the projection 21d at the left end of the sliding plate A21 is
The tooth #X5 is formed so as to occupy a position slightly spaced to the right from the pin 4a of the lever 4 in a state in which the tooth #X5 meshes with the gear 7. Reference numeral 22 denotes a lock lever which is a locking member biased counterclockwise so as to engage with the upper step 21c of the sliding plate A21, and as shown in FIG. In this state, the right end of the lock lever 22 does not engage with the stepped portion 21c, and in that case, the right end of the lock lever 22 acts in the forward direction perpendicular to the plane of the paper. It is formed so as to be positioned slightly apart from the small-diameter detail 23a at the lower end. Below, the sliding plates A21, B24 and the lock lever 22
The effect of clutch switching in the power transmission system due to the operation will be explained. When the exposure of one screen of film is completed by the suppression of the chanterel release shaft 23, a circuit that automatically rotates the motor counterclockwise is turned on, and the gear 5 is moved to the left by the operation of the first clutch described above, and the gear 5 is rotated to the left. meshes with I'f16,
The film is wound. On the other hand, the gear 15 moves rightward due to the operation of the second clutch described above, and the lever 14 is kept in the position where it comes into contact with the stop bin 28 and is stopped. From this state, when the switch of the circuit that rotates the motor clockwise is turned on, the first
As shown in the figure, the gear 5 meshes with the gear 7, and the gear 1
5 is also biased in the direction of meshing with the gear 16, but the lever 14
Since the pin 14a is locked to the protrusion 21b of the sliding plate A21, there is no meshing, and therefore only the gear 7 rotates clockwise to rewind the film. On the other hand, from the stationary state of the power transmission system, the stirring piece 26 protruding from the exterior of the camera is pressed in the direction of the arrow to move the sliding plate B24.
When the sliding plate A21 moves to the left, the protrusion 21b releases the bin 14a of the lever 14 from the restrained state, and the protrusion 21d releases the bin 4 of the lever 4.
By pressing a to the left, the gear 5 is restricted to a range where at least the gear 7 cannot be meshed. Next, the protrusion 24b of the sliding plate B24 turns on the switch 27 of the circuit that rotates the motor clockwise.
As shown in the figure, the gear 5 is urged to move rightward, but since the pin 4a is blocked by the protrusion 21d of the sliding plate A21, it does not mesh with either the gear 6 or the gear 7 and moves counterclockwise. be placed in a state of idling. On the other hand, the tooth r1115, which is released from the restraint due to the movement of the protrusion 21b, is urged to move to the left by the counterclockwise rotation of the gear 13, and as a result, the tooth r1115 meshes with the gear 16 and moves the lens. This state is maintained by locking the step portion 21c of the sliding plate A21 with the locking member 22. In this way, the lens movement operation starts from the state shown in FIG. 2, even if the operating section 26 is released from the pressed state and the sliding plate B24 is returned to the right direction, the circuit remains in the ON state, and therefore the lens movement is performed. The motor continues to rotate until the end of the rotation. Then, when the shirt taller's shaft 23 is pushed in the direction toward the front of the page to perform exposure, the shirt taller's pongee 23
A tapered part 23b formed between the outer diameter part and the detail 23a.
acts to slightly rotate the lock lever 22 clockwise to release the stoppage of the sliding plate A21. Therefore, the sliding plate A21 is moved rightward by the tension spring 20 and returns to the position shown in FIG. 1, so that the tooth Jl! 15 is disengaged from gear 16, and at the same time, the tooth $5 is released from its restrained state and becomes in a state where it can mesh with gear 7. Therefore, as mentioned above, by turning on the circuit that rotates the motor clockwise, the film is removed. This results in a state in which it is possible to perform rewinding. In addition to the means for releasing the lock lever 22 from the engagement state with the sliding plate A21, in addition to the operation of the shutter release shaft 23 described above, there is also a means for releasing the lock lever 22 from the engagement state with the sliding plate A21. This is possible, and FIG. 3 shows an example thereof. 31 is a release lever biased clockwise by a tension spring 33 with the shaft 32 as a fulcrum;
1a is the lock lever 2 that locks the sliding plate A21;
The other end 31b is kept in pressure contact with the outer peripheral surface of the lens barrel 40 of the bifocal lens. The lens barrel 40 has a photographing lens 41 and a camera lens 42 built therein, and when the lens barrel 40 moves in the direction of arrow A or arrow B, the lens barrel 40 moves the camera lens 42 into the optical path of the camera lens 41. By inserting and removing the lens, the focal length of the optical system can be changed. The lens barrel 40 also has a mechanism that presses the end 31b of the release lever 31 to rotate the release lever 31 counterclockwise when the lens barrel 40 reaches the stop position in the directions of arrows A and B. The release lever 3 is provided with a pair of protrusions 40a and 40b, and when the lens movement for focal length switching is completed, the release lever 3
1 to rotate the lock lever 22 clockwise;
The locking of the sliding plate 21 is released. That is, the lens barrel 40 further moves in the six directions of the arrow from the state shown in FIG.
), the lens movement is completed and at the same time the release lever 31 operates the lock lever 22. When the lens movement is completed, the release lever 31 is moved counterclockwise. Therefore, the lock lever 22 remains in the clockwise rotated position, but when moving the lens again, the operation section 2
6 is kept pressed leftward for a short period of time, the lens barrel 4° begins to move in the direction of arrow B, and the locking lever 22 can again lock the sliding plate A21. In addition to the lens movement shown in the embodiments, operations other than film transport in the present invention include opening the lens cover and moving the flashlight, and the camera of the present invention can perform any of these operations. It can also be driven in conjunction with film winding and rewinding operations.

【Effect of the invention】

As is clear from the above description, the present invention makes it possible to switch the power transmission system so that the gears are stationary and then drive the power transmission. It is an object of the present invention to provide an inexpensive and compact camera which can prevent harmful movement caused by the inertia of teeth etc. to the transmission system and can accurately work on any power transmission system.

[Brief explanation of the drawing]

FIGS. 1, 2, and 3 are main part views showing the power transmission mechanism of the camera according to the present invention. 1... Gear (for motor) 4, 14...
... Lever 6 ... (Film winding) Gear 7
......(Film rewinding) gear 16...
・(For lens movement) Gear 21...Sliding plate A
22...Lock lever-23...
・Shirt release shaft 24...Sliding plate B 26...
・Operation unit 27...Switch Applicant: Konishiroku Photo Industry Co., Ltd. Figure 2

Claims (1)

[Claims] A first clutch and a second clutch that switch the power transmission system depending on the rotational direction of the motor are engaged with a rotating body directly connected to the motor, and a film winding mechanism and a film rewinding mechanism are selectively engaged with the first clutch. a regulating means for selectively engaging the second clutch with a mechanism for performing operations other than winding and rewinding, and regulating the operation of the first and second clutches; The regulating means is locked by a releasable locking member in order to displace the operating member to a position where the operation of the first clutch is restricted, and to displace the regulating means to a position where the operation of the second clutch is restricted. A camera characterized by being configured as follows.