JPS59232323A - Film winding device - Google Patents

Abstract

PURPOSE:To prevent the malfunction due to the inertia by forming a small hole of an operating body narrowly along the moving direction of the operating body. CONSTITUTION:The rotation of a winding motor 33 is decelerated by a gear train 32 and is transmitted to a winding shaft 31 to drive a winding part 4 of a film cassette 3. A gear 34 of the gear train 32 is so constituted that it is rotated once in accordance with feeding of one frame, and a long hole 35 is provided in the peripheral part. A photocoupler 36 is provided in the position which the long hole 35 passes when the gear 34 is rotated, and the rotation of the gear 34 is detected by detecting this long hole 35, and the rotation of the winding motor 31 is stopped. The gear 34 is formed into a disc shape with metallic materials, and the long hole 35 is formed narrowly along the circumferential direction in the peripheral part between a press-fitting hole 37 and a tooth part 38. Consequently, this constitution is equivalent to formation of a large hole even if a large hole cannot be provided in the operating body with respect to space, and overrun components due to inertia of the operating body are absorbed to stop the rotation within the range of the small hole, and thus, the malfunction is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a film winding device incorporated into, for example, an endoscopic camera.

For example, when winding film in an endoscopic camera, a two-hand hole (large hole cannot be made due to space constraints) is provided in the gear that transmits the rotation of the winding motor to the film winding shaft. The passage through the small hole is detected by the kefotocabra.

This signal is stored in the storage section of the control device, and is stopped by a command from the control device.

Since the gear has inertia, it will stop at the position where the small hole has completely passed through the photocoupler, so if the power is cut off due to a power outage (-), the memory of the small hole passing through will also be erased, and the winding will start again. This had the disadvantage that it would start to move.

The present invention was made by focusing on the first and second circumstances.

The object thereof is to provide a film winding device that can eliminate malfunctions caused by the imager of a member that transmits the winding motion.

Hereinafter, one embodiment of the present invention will be described based on the drawings regarding the case in which two cameras are installed.

In Fig. 1, reference numeral 1 denotes a back cover provided with an opening (2) of the cassette storage chamber. The opening of the storage chamber is configured to open and close.A slide plate 5 that moves downward is provided at a side portion of the film cassette 3 close to the film winding section 4.
An engagement operation lever 6 as an engagement operation member that moves parallel to the slide plate 5 is provided. The slide plate 5 is urged upward by a tension coil spring 7, and the engagement operating lever 6 is urged upward by a torsion spring 8. Further, a projecting piece 9 is integrally formed on the side of the slide plate 5, and this projecting piece 9
The L end of the engagement operation lever 6 hits the abutment surface 10 formed of the lower end surface of the lever 6, and is restricted to one position. The lower end of the engagement operation lever 6 is bent and extended toward the lower side of the film winding part 4 of the film cassette 3, and the end of this extension is attached to the inner cylinder 11 of the film winding part 4. A push-up pin 12 for pushing up is provided. An engaging pawl 13 exposed on the north surface of the film cassette 3 is provided at the upper end of the inner all, and when the inner cylinder 11 is pushed up, the engaging pawl 13 hits and engages with a winding pawl 14, which will be described later. It has become. 1. The slide plate 5 is exposed to the outside of the camera body.
A knob 15 for opening the ik lid is provided, and this knob Z5
It can be pressed down using f. In conjunction with the descent of the slide plate 5, the back cover l opens and opens the cassette storage chamber. Open. Also, a lock lever 16 is provided between the back cover 1 and the slide plate 5 (=). At the upper end of this lock lever 16, the back cover 11 has a general girder protrusion 1.
An abutting portion 18 corresponding to the lock lever 7 is provided.
16 has a nutopper portion 2Z7. which is engaged with a stopper edge 19 formed by cutting out the slide plate 5. - constitutes. Further, the lock lever 16 is rotated by a torsion spring 22.
The abutting portion 18 is urged to rotate in a direction in which it abuts against the protrusion Z7. As shown in FIG. 1, when the back cover 1 is closed, the protrusion I7 hits the abutting part zl?l, and the stopper part 21 is retracted from the stopper edge 19.
The lock lever 16r is rotated to the position shown in FIG. Furthermore, when the slide plate 5 is pushed down, the protrusion 17 of the back cover l retreats from its lock lever 16, and the stopper edge 19 descends, so that the twisting force 22 (the second lock lever Z6 rotates and the stopper part 21 is engaged with the stopper edge 19 (-5) to prevent the slide plate 5 from returning to the 1st position. Lock lever 16 for pushing
Does it rotate and engage the above? unlock. Therefore, the slide plate 5 is automatically raised and returned by the urging force of the tension coil spring 7. The vertical movement of the slide plate 5 (accordingly, the engagement operating lever 6 follows and moves the inner cylinder 11 up and down) - A transmission gear is provided at one end of the slide plate 5. A projecting piece 25 is provided which forms a rack gear 24 that engages with the transmission gear 23.
C is engaged with a rack gear 27 formed at one end of the back cover closing slide plate 26, and when this transmission gear 23 rotates, the first slide plate 26 is parallel to the back cover I C''--
Move. A locking piece 28 is provided at the other end of the back cover closing slide plate 26.
is formed so that it can be engaged with a locking pawl 29 provided on the back cover 1. That is, when the back cover closing slide plate L 26 moves in the direction of the arrow due to the rotation of the transmission gear 23 as the slide plate 5 descends, the engagement is disengaged.

It is designed to engage when it moves in the opposite direction and returns.

On the other hand, the curly claw 14? The winding shaft 31 has a transmission mechanism, for example, a gear train 32 consisting of a plurality of spur teeth. It is connected to the winding motor 33 through the winding motor 33. The first winding shaft 31 receives the rotation of the first winding motor 33 while being decelerated by this gear train 32, and the winding portion 4 of the film cassette 3
71r-Volume 1 is designed to run t#. Also, one gear (operating body) 3 among the intermediate gears of the gear train 32
4 is configured to rotate once in response to l-frame loading. As shown in FIGS. 6 and 8, this gear 34 has a long hole 35 formed locally therein. gear 34
A photocoupler 36 as a detector is installed at a position corresponding to the locus ``2'' that the elongated hole 35 passes when rotates, and by detecting the elongated hole 35, it is detected that the gear 34 has rotated once. Then @tge motor 31 rotation? It is designed to stop. The gear 34 is formed, for example, into a disk shape by a metal alloy, and as shown in FIG. 8, a press-fitting hole 32 is bored in the center C2.

Teeth portions 38 are formed around the entire circumference.

The circumference between the press-fitting hole 37 and the toothed portion 38 (2. The elongated hole 35 is arranged) is noted.
It is formed long along the circumferential direction C2. In other words, it is formed to be elongated along the moving direction of the gear 34. The fitting projection 41ξ of the pinion gear 39 is press-fitted into the press-fitting hole 37, and the fitting is fixed. Also, is there an example of specific dimensions? As shown, the diameter of gear 34 is 12.61+27
R, Binion gear 390'r 100 diameter Ha 4.3 +u+
.

The tooth depth of the tooth portion 38 is 0.65 #A, the length along the center line of the long hole 35 is 2.5 al, and the width of the long hole 35 is 2 mm. Further, the gear 3B passes through each of both ends of the long hole 35 on the center line of the long hole 35 with a long angular interval of the long hole 35.
The angle formed by two straight lines toward the center of ) is 30°.

Further, the diameter of the press-fitting hole 37 is 271IJ1. In addition, in the case of an endoscope camera, the minimum hole diameter that can be detected by a photocoupler is approximately 1 + [1), and the overrun is 0.5 -
It's about the same as my friend. It is desirable that the length of the elongated hole 35 is at least twice the length of the overrun.

Further, the left and right peripheral surfaces of the elongated hole 35 are colored black, and this colored portion 40 causes reflection at the position of the elongated hole 35. It's supposed to be suppressed. In other words, the output of the photocoupler 36 at the position of the long hole 35 and the long hole, 9,
s 32+, difference in output outside? You can make it bigger. Therefore, the long hole 35 can be detected stably and reliably.

On the other hand, the shaft 4I of the first gear 34 extends in the t direction,
This middle part (2) indicates that the middle part of the reset lever 42 is freely attached so that it can rotate freely, and t@ (2) of the shaft 41 is fixed so that the frame feeding claw 43 is fixed. The frame feeding pawl 43 rotates a ratchet wheel 44.The ratchet wheel 44 is fixedly attached to the shaft 46 of the frame number plate 45, and the frame feeding pawl 43 rotates when the frame feeding pawl 43 rotates. Each time it rotates, it is rotated by l teeth, and the frame number plate is rotated by 45?l piece scales.Also.

The piece number plate 45 is formed into a disk shape, and for example, 16 pieces.
Large-diameter protrusions 47 are formed corresponding to the frame number scales north of the frame. When the number on the frame number scale 48 reaches 16 or more, this large-diameter protrusion 47 is positioned opposite to a first photocoupler 49 for detecting remaining number warning and is detected. Moreover, when this 1st photocoupler 49 detects the tth large diameter protrusion 47, this 4LK? For example, you can control the indicator light in the viewfinder to blink.
Did the number of pieces decrease? It is configured to inform you.

Further, an 11-force coil spring 51 is wound around the shaft 46 of the frame number plate 45, and urges the frame number plate 45 and the shaft 46 to rotate clockwise. Furthermore, a locking pawl 52 for preventing reverse rotation is engaged with the ratchet wheel 44 to prevent the ratchet wheel 44 from reversing. Note that the locking pawl 52 is configured to be released by a release arm 53 formed to protrude from the reset lever 42.

A discrimination cam 54 is fixedly attached to the lower end of the shaft 46 of the frame number plate 45. This discrimination cam 54 is formed in the shape shown in FIG. 2, that is, a first cam surface A corresponds to the film paste, a second cam surface B corresponds to the portion up to 20 frames, ) The third cam surface C corresponding to the railer portion and the fourth cam IfiD corresponding to the end point C2 are formed in the order of their rotational directions, and are formed to have smaller diameters in sequence. A cam follower portion 56 of a cam lever 55 is elastically joined to the circumferential surface of this cam 54Q).

The cam lever 55 is pivotally supported at its middle portion,
The cam follower portion 56 is urged by the torsion spring 57 so as to contact and follow the cam circumferential surface of the cam 54 marked t. The other end of the cam lever 55 constitutes a detected portion 58, which is located on a straight line passing through the center of rotation of the cam lever 55 (second and third photo detectors as a pair of detectors installed in parallel). The detected portion 58 is optically detected by the couplers 59 and 60.
is a pair of plate parts 61.6 shifted left and right as shown in Fig. 2.
2p is formed, and the second plate part 62 on the distal side is on the rotational direction side of the cam lever 55 (shifted by two steps) than the plate part 6I on the proximal side. When one of the photocouplers 59 and 60 faces its corresponding one, the other plate portions 61 and 62 face the other photocoupler 5.
9.60 (FIG. 2, FIG. 4), and the photo coupler 59.60 is in both plate portions 6J, 6.60. ? (Fig. 3) and ? You can choose. Furthermore, the cam lever 55 has a reset operation end 63 of the reset lever 42?
A receiving bin 64 is provided.

The cam lever 55 is rotated by the reset lever 42 against the biasing force of the torsion spring 57, and can be retracted to position C2 shown by the two-dot chain line in FIG. A rack 65 that engages with the transmission gear 23 is provided at the other end, and is swung by the rotation of the transmission gear 23. The operation will be explained. First, when storing the film cassette 3 in the cassette storage chamber, use the back cover opening knob 15 to open the slide plate 5. Press down. This (= interlockingly opens the back ff1J, the lock lever 16 rotates, and the stopper part 21
falls onto the stopper edge 19 and locks therein, thereby preventing the slide plate 5 from returning to its original position. 1. As the slide plate 5 descends, the transmission gear 23'a' is rotated by the rack gear 24, and the back cover closing slide plate 26?
By moving the locking piece 28 from the locking claw 29 of the back cover l to the outside f, the back cover 1 can be opened as described above.

Furthermore, due to the descent of the slide plate 5, the abutment surface 10
The engagement operation lever (-6) that is in contact with the cassette storage chamber also descends, and the pusher bottle 12 retracts to the bottom of the cassette storage chamber. Also, as the transmission gear 23 rotates, the reset lever 42 also Rotate.

The locking claw 52 from the release arm 53C? Rotate and release the reset operation end 6 from the ratchet wheel 44.
2, the cam lever 55 is rotated to the position shown by the two-dot chain line in FIG. 2 (the cam lever 55 is completely separated from the circumferential surface of the discrimination cam 54). Since the ratchet wheel 44 is released, the biasing coil spring 51 causes the frame number plate 45 and the discrimination cam 54 to rotate and return to the standby position shown in FIG.

Meanwhile, load film cassette 3 into the cassette storage chamber,
When the back cover 1 is closed, its protrusion 17 hits the abutting portion 18 of the lock lever I6 and releases the slide plate 5. Therefore, this slide plate 5 returns to the ball-up position, and the transmission gear 232
As it rotates, the engagement operation lever 6 moves up and returns by one level following the abutting surface 10, and the inner cylinder 11'12 of the film cassette 3 (the inner cylinder 11'12 of the film cassette 3 is pushed down, the engagement claw 1
31￥ Lock it in the curling claw 14.

Also, by raising the slide plate 5 by 1, the transmission gear 2
3 rotates, the back cover closing slide plate 26 moves,
The piece 281f is engaged with the locking claw 291'' of the back cover I. In other words, the back cover I is locked in the closed state.Furthermore, (
2. The reset lever (-42) is also rotated clockwise and separated from the locking pawl 53 and the cam lever 55. Therefore,
The locking pawl 52 locks on the ratchet wheel 44, and also
As shown in FIG. 2, the cam lever 55 (=its cam follower portion 56 is the discrimination cam 54o) hits the cam surface A of $1 and waits. As a result, the second photocoupler 59 faces the first plate portion 6I and detects it, but the second photocoupler 60 is in a non-detecting state. Also, the first photocoupler 49 is naturally in the non-detection state. In other words, the combination signal (■) in Table C2 is obtained.

Then, the winding motor 33 is rotated by the loop signal, and the league part feed operation is performed. Start. In other words.

The rotation is transmitted to the winding pawl 14 via the gear train 32 and the winding shaft 31, and rotates toward the inner periphery 11 through the engaging pawl 13 that engages with the winding pawl 14. In this manner, winding of the film gluer section is performed.

Also, during the feeding operation, the gear 34 in the middle of the gear train 32 rotates, but the number of times the photo coupler 36 passes through the elongated hole 35 increases.
(2) Detect the amount of feed. In this case, the tooth RL34 operates as one frame feed per revolution. Then.

When performing this seven frame feed, the gear 34 and its shaft 4
1′? The frame feeding pawl 43 rotates through the ratchet wheel 44? Rotate l teeth at a time.

When the league portion is fed by a predetermined number of frames, for example, 3 frames, the 5-discriminating cam 54 also rotates, resulting in the state shown in FIG. 3. That is, the cam lever 55, which had been in contact with the first cam surface A, comes off the first cam surface A and now comes into contact with the second cam surface B. Therefore, the cam lever 55 also rotates by the lift difference, and the lth and 20th plate parts 61,62 of the detected part 58 are connected to the second and third photocoupler 59,60.
facing both of them respectively. In other words, in the above table, the detection state is ``■''. and.

When this state is reached, the operation of the second winding motor 33 is immediately stopped.After this, the winding motor 33 is automatically operated every time a release signal is received, and the gear 34 is
When the long hole 35 rotates and is detected by the photocoupler 36, the l-frame feeding operation is performed each time in which the feeding operation is stopped. When up to 15 frames are photographed in this way and the 16th frame is advanced, the large-diameter protrusion Ii1 portion 47 of the frame number plate 45 comes to be located opposite the l-th photocoupler 49.

The first photocoupler 49 enters the detection state.

Then, the indicator light in the finder blinks [7] to notify that the number of frames remaining is low.

Furthermore, when shooting continues and up to 20 images have been used, the cam follower portion 56 of the cam lever 55 falls onto the third cam surface C of the 1-discrimination cam 54, and the cam lever 55 rotates a certain amount, resulting in the state shown in FIG. 41. becomes. Therefore, the $1 plate portion 61 comes off from the second photocoupler 59, and the second
(7) The plate portion 61 faces the third photocoupler 60. Therefore, - the detection state shown in Table (3) above is achieved. In response to this signal, the control section operates the hoisting motor 33 to continue feeding the trailer by, for example, three frames. When this trailer part feeding is completed, 1
The discrimination cam 54 rotates a certain amount, and the cam follower portion 56 of the cam lever 55 moves to the fourth cam surface. Depression.

The cam lever 55 is in the state shown in FIG. In other words, both the second and third photocoupler 59°60 are
The sensor moves away from the sensor and enters a non-detection state. Furthermore, at this time, the first photocoupler 49 has a large diameter protrusion 47? Detected. Therefore, in the above table, the end state is indicated by ■. This is recognized by the control unit C2.

The above operation completes the operation, and when taking out the film cassette 3 (= means back cover 1 as described above).
314 release knob 15? Press down (two-way lid If
When it is opened and taken out, the above-mentioned reset operation is performed.

As explained above (2) In the present invention, there is a small hole provided in the operating body that transmits the winding motion.Since it is formed elongated along the moving direction of the operating body, there is a large hole in the operating body in terms of space.
Is it a substantially large hole even if it is difficult to drill? It will be the same as when it was formed.

In other words, according to the small hole according to the present invention, the overrun due to the inertia C2 of the moving body? The photocoupler can be absorbed and stopped at the corresponding position within the range of the small hole. Therefore, even if the power is cut off due to a power outage or the like and the memory of passing through the small hole disappears, the small hole will be detected again, so the operating body will not start moving after one energization. In other words, is the malfunction due to the inertia ζ2 of the member that transmits the first winding action? To wake up? It can be avoided.

[Brief explanation of the drawing]

Is the drawing an example of the present invention? Fig. 1 is a perspective view of the film winding device, and Figs. 2 to 5 are a perspective view of the film winding device.
↑ Indicates the operating order of the mechanical parts that detect the down state.
6 is a plan view of the frame feed detection section, FIG. 7 is a side view thereof, and FIG. 8 is a developed sectional view thereof. 32...m vehicle convoy, 33...hoisting motor, 34...
. Gear, 35... Long hole, 36... Photocabra. Applicant's agent Patent attorney Takehiko Suzue +
58 Figure 6 Figure 7 Kazuo Wakasugi, Commissioner of the Patent Office 1. Indication of the case Japanese Patent Application No. 58-107365 2, Name of the invention Film winding device 3, Person making the amendment Relationship to the case 1 special person? ? 'Yama (037) Olympus Optical Industry Share 4
, Agent 6, Different color of amendment 7, Contents of amendment (1) ``Image-ya'' on page 2, line 8 without details.
(2) Delete "Tension coil" on page 3, line 2, page 5, line 6. (3) Delete "Tension coil" on page 4, line 19 of the same page. " is corrected to "torsional splash". (4) On page 14, line 17 (last line), after "...signal is obtained." 3
3 receives a command from the control unit to continue rotating seven times, and the hoisting motor 33 continues to rotate. ” to join. (5) Delete "This signal causes the winding motor 33 to rotate" in the first and second lines of page 15. (6) Correct the number of passages through this elongated hole 35 from the 8th line of the 15th page to the 3rd line of page 16 to ``at this time''. . (7) On page 16, lines 16 to 17, “When this state occurs, the operation of the group χ is stopped. J is [■
When the next signal from the elongated hole 35 is detected after the signal is input, the operation of the hoisting motor 33 is immediately stopped. j
C Correct. (8) Correct beam 2 in the drawing as shown in attached sheet of Figure 2. Figure 2

Claims (1)

[Claims] In a film winding device that has an operating body that transmits the winding motion (a two-hand hole is provided and the winding motion is stopped by detecting this small hole with a photocoupler), the handle hole is located along the moving direction of the operating body. A film winding device characterized in that it is formed into a long and narrow shape.