JPH0629934B2 - Camera film feeder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film feeding device for an endoscopic camera, and more particularly to a film feeding device capable of idle feeding control.

Recently, in a camera for an endoscope, when shooting is performed using a long film having a total number of film frames of, for example, 40 frames, an idle feed section is provided between the middle 20th frame and the 21st frame. Is being done. This is because the film is cut by the idle feed unit to make two films of 20 frames, so that the number of short film films which has been conventionally used is 2
This is so that the automatic development system and filing system for 0-frame film can be used as they are. In this way, in order to form an idle feed part in the middle of the film, a protrusion is provided between the number of frames required for idle feed of the number plate of the frame counter and the number of frames. A method of controlling the feed timing and the number of blank feed pieces has been proposed. However, since the frame number plate is designed to rotate in tandem with film feed, this method requires a space equivalent to the number of frames in the frame feed in the frame number plate. Compared to the same number of pieces in the piece counter, the number indicating the number of pieces was inevitably small, and it was very difficult to see.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a film feeding device for a camera, which enables easy feed control without providing a protrusion on the frame number plate and makes it easy to see the frame counter. And

An example of applying the film feeding device according to the present invention to an endoscope camera will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the endoscope camera includes a camera body 1, and the camera body 1 has a film cassette storage chamber (not shown) in the rear portion. The film cassette storage chamber has an opening at the bottom of the camera body 1 and is openably closed by a back cover (not shown). The film cassette 2 is detachably mounted in the film cassette storage chamber. In this embodiment, the film cassette 2
Has a film 3 having a total of 20 film frames.
The film cassette 2 has a film supply chamber 2a, a film winding chamber 2b, and a bridge (not shown) connecting these. One end of the film 3 is locked to the spool shaft 49 (shown in FIGS. 4 and 5) of the film winding chamber 2b, and the other end of the film 3 is wound in the film supply chamber 2a in an unexposed state. Has been housed.
An opening 4 for introducing observation light and photographing light from a connected endoscope (not shown) is provided at the center of the front surface of the camera body 1.
a is provided. A photography adapter (not shown) is connected to the opening 4a by a bayonet mount or the like. The endoscope is attached to the camera body 1 via this photographing adapter.

Behind the opening 4a, immediately before the film 3, that is, the film supply chamber 2a of the film cassette 2 and the film winding chamber 2
The movable mirror section 5 is disposed between the movable mirror section 5 and b. Although details will be described later, the movable mirror unit 5 rotates between a first position that shields the photographing optical path and reflects light from the subject toward the penta roof prism 6 and a second position that does not shield the photographing optical path. It is freely movable. That is, the movable mirror section 5 functions as a mirror shutter of the endoscope camera. A penta roof prism 6 is disposed above the movable mirror unit 5 to receive light from the subject when the movable mirror unit 5 is in the first position. An eyepiece 4b is provided on the rear surface of the camera body 1 located behind the penta roof prism 6.

A large-capacity capacitor 9 is arranged below the inside of the camera body 1 in front of the film supply chamber 2a. Above the condenser 9, there is provided a first drive unit for driving the movable mirror unit 5.
The motor 7 is provided. The drive shaft of the first motor 7 is parallel to the rotation shaft of the movable mirror unit 5. The driving force of the first motor 7 is transmitted to the movable mirror section 5 by a mirror driving mechanism 10 described later.

A second motor 8 for film winding is arranged in the camera body 1 in front of the film winding chamber 2b. The drive shaft of the second motor 8 is parallel to the spool shaft 49 of the film winding chamber 2b. This second motor 8
Is transmitted to the spool shaft 49 via a film winding drive mechanism 40 described later. Above the second motor 8, a frame number meter 38 of the remaining mathematical formula is arranged.

Next, the mirror driving mechanism 10 will be described with reference to FIGS. 2 and 3.

A mirror drive mechanism mounting plate 11 is attached to the camera body 1. The first motor 7 described above is fixedly provided on the mounting plate 11. This first motor 7
Rotates only in the counterclockwise direction as shown. The drive gear 12 is attached to the drive shaft of the first motor 7.
Are fixed coaxially. A large-diameter first intermediate gear 13 meshes with the drive gear 12. The first intermediate gear 13 is rotatably supported by the mounting plate 11. The first intermediate gear 13 is provided with a small diameter second intermediate gear 14 fixed to the mounting plate 11 side.
A large diameter driven mesh 15 meshes with the second intermediate gear 14. The driven gear 15 is rotatably supported by the mounting plate 11. The rotary shaft of the driven gear 15 has
Fixed to this, a mirror actuating cam 16 is provided at a position between the driven gear 15 and the first intermediate gear 13. The mirror actuating cam 16 can be rotated only in one direction along the counterclockwise direction. This mirror actuating cam 16
It has a cam surface which is continuously away from the closest position from the rotation axis in the clockwise direction to reach the farthest position, and is discontinuously coupled between the adjacent closest position and the farthest position. . The driven mirror 30, which will be described later, of the movable mirror portion 5 contacts the farthest cam surface of the mirror actuating cam 16, whereby the movable mirror portion 5 is held at the first position. Further, the cam surface at the closest position is separated from the cam surface at the farthest position and the driven roller 3
0 approaches the cam surface at the latest position, and the movable mirror unit 5
Even if the position reaches the second position, it is made so as not to contact the cam surface at the latest position.

Next, the movable mirror section 5 will be described.

The movable mirror unit 5 includes a mirror 20 as a reflection member, a mirror support 22 that supports the mirror 20, and a mirror bracket 21 fixed to the mirror support 22. The mirror bracket 21 has a shaft support pin 24 planted in a shaft support 23 fixed to a camera body (not shown).
Is rotatably supported by. This shaft support pin 24
The rotating shaft of is parallel to the drive shaft of the first motor 7 described above.

The mirror bracket 21 located above the pivot pin 24 is provided with a first protrusion 25 extending upward. A first spring 26 is stretched between the first protrusion 25 and the camera body 1. The first spring 26 biases the movable mirror portion 5 from the first position toward the second position, that is, in the up direction.

The mirror bracket 21 located behind the pivot pin 24 is provided with a second protrusion 27 protruding rearward. At a predetermined position of the second protruding portion 27, a detected portion 29 of detecting means for detecting that the movable mirror portion 5 has reached the first position is provided. This detected part 29
Is composed of a reflecting mirror having a predetermined size. When the movable mirror unit 5 is in the second position, the detection unit 28 is arranged at a position facing the detected unit 29.
The detection unit 28 is fixed to a mounting piece 19 mounted on a camera body (not shown). The detection unit 28 is composed of a light emitting element and a light receiving element. The light emitting element and the light receiving element each have a predetermined angle so that when the movable mirror section 5 reaches the first position, the light from the light emitting element is reflected by the reflection mirror as the detected section 29 and reaches the light receiving element. Is provided.

Further, the driving force of the first motor 7 is applied to the mirror bracket 21 located in front of the pivot pin 24.
A driven roller 30 that is transmitted via 0 is provided. The driven roller 30 is rotatably supported by the mirror bracket 21. The movable mirror portion 5 is restricted to the first position in a state where the farthest cam surface of the mirror actuating cam 16 is in contact with the driven roller 30 by the urging force of the first spring 26. Further, when the mirror actuating cam 16 rotates counterclockwise and the driven roller 30 is released from the contact state with the cam surface at the farthest position, the movable mirror portion 5 is moved by the urging force of the first spring 26. Rotates counterclockwise about the pivot pin 24. This rotation is performed by the mirror stopper 35 attached to the camera body 1.
Until the tip of the movable mirror section 5 comes into contact with the.
The mirror stopper 35 is made of maltoprene. The movable mirror portion 5 takes the second position in a state in which the rotation is restricted by the mirror stopper 35. Further, in this state, the driven roller 30 is not in contact with the cam surface at the latest position.

Behind the movable mirror portion 5 is provided a light shield 31 that shields the film 3 from the subject light together with the mirror support 22 when it is in the first position. This light shield 31
In the portion facing the film 3, an opening 33b is formed to allow the exposure of the light from the subject to the film 3 when the movable mirror portion 5 is at the second position. Also,
An opening 33c is formed in the portion of the light shield 31 facing the mirror support 31 when the movable mirror portion 5 is in the first position. The light shield 31 is attached to a mirror box 32 that surrounds the light shield 31 and is fixed to the camera body 1. An opening 33 a is formed in the mirror box 32 facing the film 3. The peripheral edge of the opening 33a defines a mask for photographing on the film surface. A well-known film pressure plate 3 is provided behind the mirror box 32.
4 are provided.

Next, the film winding drive mechanism 40 will be described with reference to FIGS. 4 and 5.

The second motor 8 is fixed to the camera body 1 in front of the film winding chamber 2b of the film cassette 2. This second
A drive gear 41 having a small diameter is coaxially fixed to the drive shaft of the motor 8. A large-diameter film feed amount detection gear 42 meshes with the drive gear 41. This detection gear 42
Is rotatably supported by the camera body 1. A small-diameter gear 43 is fixed to the upper side of the detection gear 42 coaxially therewith. A large-diameter first intermediate gear 44 meshes with the gear 43. The first intermediate gear 44 is rotatably supported by the camera body 1. A second intermediate gear 45 having a small diameter is fixed to the lower side of the gear 44 coaxially therewith. A large-diameter third intermediate gear 46 meshes with the second intermediate gear 45. The third intermediate gear 46 is rotatably supported by the camera body 1. A fourth intermediate gear 47 having a small diameter is fixed to the lower side of the gear 46 coaxially therewith. A driven gear 48 meshes with the fourth intermediate gear 47. The driven gear 48 is fixed to the spool shaft 49. The spool shaft 49 is rotatably supported by the camera body. This spool shaft 4
9 engages with an engaging portion provided in the recess of the hoisting chamber 2b,
The film 3 is wound in accordance with the rotation of the spool shaft 49.

Here, a plurality of, for example, eight through holes 39 are formed in the peripheral portion of the film feed amount detection gear 42 at equal intervals along the circumferential direction. A detection unit 50 is arranged so as to be able to face one of these through holes 39. This detection unit 50
It has a light emitting element and a light receiving element facing each other with the gear 42 as a boundary. This light receiving element allows light from the light emitting element to pass through the through hole 39 when one of the through holes 39 faces it.
A predetermined signal for notifying the rotational position of the drive shaft of the second motor 8 is output. The detection unit 50 detects that the film 3 has traveled a certain amount, and the second motor 8
Is to stop the driving of the drive at any position.

Next, the frame counter 38 will be described with reference to FIGS. 6 and 7.

The frame number counter 38 is a remaining mathematical formula for displaying the number of frames that can be photographed. The counter disk 51 is rotatably provided on the camera body 1 and is located above the second motor 8 and the counter disk 51. The disc 51 is provided coaxially with a ratchet gear 52 fixed to the lower side of the disc 51. On the peripheral edge of the counter disc 51, E, 1 to 40 and S frame number display numbers 77 are drawn at equal pitches along the circumferential direction. These numbers 77 are arranged so that the numbers become smaller sequentially in the clockwise direction. A display window 78 for selectively displaying one of these numbers 77 is formed on the upper surface of the camera body 1 not shown.

Forty-eight saw teeth are formed at equal intervals over the outer peripheral portion of the ratchet gear 52 described above. That is, the saw teeth are arranged at 7.5 ° intervals. This pitch of the saw blade is made equal to the pitch of the display numeral 77. First to fourth position detection holes 102 to 105, which will be described in detail later, are formed at predetermined positions on the surface of the ratchet gear 52 so as to penetrate in the thickness direction. A set ring 81 of a set mechanism 79, which will be described later, is fitted to the ratchet gear 52 coaxially with the ratchet gear 52 so as to be rotatable therewith. A gear is formed on the lower outer peripheral portion of the set ring 81, and a locking piece 82 projecting outward is formed on a part of the upper outer peripheral portion. A stopper pin 80 capable of contacting the locking piece 82 is fixed to a part of the inside of the ratchet gear 52. The counter disc 51 is biased in the clockwise direction in the figure, and the stopper pin 80 abuts on the locking piece 82 and maintains its position in a state where the racket gear 52 is not regulated at all. .

Next, the progress mechanism 37 of the remaining mathematical formula counter 38 will be described with reference to FIGS. 6 to 10.

An advance claw 53 and a stopper claw 54 are provided so as to be freely engageable with and disengageable from the teeth of the ratchet gear 52 described above. Progress nail 53
Is fixed to one end of the advance lever 61. At the other end, the advance lever 61 is rotatably supported by a support arm 62 of an advance base lever 55, which will be described later, via a second shaft 63. Further, the advance lever 61 has a released arm 65 that partially projects on the same plane. The step base lever 55 is rotatably supported by the camera body 1 via a first shaft 57 and is located above the step lever 61. The step base lever 55 includes a step arm 58 that can be engaged with one side edge of the mirror bracket 21 on the film winding chamber 2b side. The first shaft 57 has a second
The spring 60 is wound. The second spring 60 has one end locked to the camera body 1 and the other end locked to the stepping base lever 55. The second spring 60 urges the stepping base lever 55 in the counterclockwise direction, that is, in the direction in which the stepping arm 58 comes into contact with the one side edge 59 of the mirror bracket 21. The second shaft 63 has
The third spring 64 is wound. One end of the third spring is locked to the stepping base lever 55, and the other end is locked to the stepping lever 61. The third spring 64 causes the step lever 61 to move counterclockwise, that is, the direction in which the step claw 53 engages with the teeth of the ratchet gear 52,
Is urged to.

Here, the mirror bracket 21 takes the position shown in FIG. 6 when the movable mirror portion 5 is in the first position. Further, in order to rotate the movable mirror unit 5 from the first position to the second position, the movable mirror unit 5 is rotated counterclockwise in FIG. 2 with respect to the shaft support plate 23 about the shaft support pin 24. The one side edge 59 of the mirror bracket 21 moves in the direction indicated by arrow A. When the movable mirror portion 5 is rotated clockwise in FIG. 3 in order to rotate it from the second position to the first position, one side edge 59 of the mirror bracket 21 is rotated.
Moves in the direction opposite to the direction indicated by arrow A and returns to the state shown in FIG. That is, the one side edge 59 of the mirror bracket 21 reciprocates in response to one reciprocating rotation of the movable mirror portion 5.

The stopper claw 54 described above is fixed to one end of a stopper lever 66. The stopper lever 66 is rotatably supported by the camera body 1 via the third shaft 67 at the other end, and is located above the step lever 61. In addition, the intermediate portion of the stopper lever 66 is provided so as to take substantially the same position as the released arm 65 of the stepping lever 61 described above in the vertical direction. A fourth spring 68 is wound around the third shaft 67. The fourth spring 68 has one end locked to the stopper lever 66 and the other end locked to the camera body 1. The fourth spring 68 biases the stopper lever 66 in the clockwise direction, that is, the direction in which the stopper claw 54 engages with the teeth of the ratchet gear 52.

The claw release lever 36 is rotatably supported on the third shaft 67. The pawl release lever 36 is the stopper lever 6
It is located on the lower side of 6 and has a standing piece 56 at one end. The standing piece 56 is provided on the ratchet gear 52 side of the intermediate portion of the stopper lever 66 and on the released arm 65 of the step lever 61.
Of the ratchet gear 52 side.
A fifth spring 69 is stretched between the pawl release lever 36 and the camera body 1. The fifth spring 69 urges the pawl release lever 36 in the counterclockwise direction, that is, in the direction in which the standing piece 56 engages with the released arm 65 and the intermediate portion of the stopper lever 66. In the state shown in FIG.
One side surface 76 of the pawl release lever 36 is in contact with a pin 75 of a back lid interlocking lever 70, which will be described later, and holds the standing piece 56 in a state where it does not engage with the intermediate portion and the released arm 65.

The back cover interlocking lever 70 is rotatably supported on the camera body 1 via a fourth shaft 71. A cylindrical actuating portion 74 is provided at one end of the back lid interlocking lever 70, and an engaging portion 73 engageable with a back lid lever 72 described later is provided at the other end. . A sixth spring 1 is provided between the back cover interlocking lever 72 and the camera body 1.
8 are stretched. The sixth spring 18 biases the back cover interlocking lever 70 in the clockwise direction, that is, in the direction in which the engaging portion 73 engages with the back cover lever 72.

The back cover lever 72 is configured to move in the direction indicated by the arrow B in response to the release of the back cover (not shown).

Next, a setting mechanism 79 for setting the total number of film frames of the remaining number of formula frames 38 will be described with reference to FIGS. 13 to 17.

A fan gear 83 is rotatably supported by the third shaft 67, which is located below the pawl release lever 36 and is rotatable.
Teeth that mesh with the teeth of the set ring 81 are formed on the outer peripheral portion of the fan gear 83. A slot 84 made of a through hole is formed in a predetermined portion of the fan gear 83. An interlocking lever 85 is pivotally supported on the third shaft 67 so as to be located immediately above the sector gear 83. A pin 86 is provided at one end of the interlocking lever 85 so as to project downward. The pin 86 is located in the slot 84 of the fan gear 83. The aforementioned slot 8
4 is formed with a size large enough for the pin 86 to be loosely inserted. That is, the fan gear 83 is rotated according to the movement of the interlocking lever 85.

At the other end of the interlocking lever 85, an engaging portion 88 capable of engaging with a cassette detecting lever 87 described later is provided. Between the shaft 67 and the engaging portion 88 of the interlocking lever 85,
A sliding contact portion 90 that engages with the operating portion 74 of the back lid interlocking lever 70 described above is formed. A seventh spring 89 is stretched between the interlocking lever 85 and the camera body 1. The seventh spring 89 urges the interlocking lever 85 in the clockwise direction, that is, in the direction in which the sliding contact portion 90 of the interlocking lever 85 contacts the operating portion 74 of the back cover interlocking lever 70.

In the state shown in FIG. 13, that is, when the back lid is closed, the back cover lever 72 is engaged with the engaging portion 73 of the back lid interlocking lever 70, and the operating portion 74 of the back lid interlocking lever 70 is interlocked with the interlocking lever 85.
The set ring 81 that meshes with the fan gear 83 when the sliding contact portion 90 of the
When the stopper pin 80 of the ratchet gear 52 is in contact with, the number "21" in the number of frames drawn on the counter disk 51 is set to be displayed in the display window 78.

Further, in the state shown in FIG. 16, that is, when the back cover is closed, the engaging portion 88 of the interlocking lever 85 causes the second rotation of the cassette detection lever 87, which will be described later, as second detection means. The set ring 81 meshing with the fan gear 83 in the state where it is in contact with the blocking portion 96 by the urging force of the seventh spring 89, the stopper pin 80 of the ratchet gear 52 contacts the locking piece 82 of the set ring 81. When touching,
"S" in the number of pieces drawn on the counter disk 51,
The display window 78 is set to display.

Next, a total film frame number detection mechanism for restricting the movement of the interlocking lever 85 will be described with reference to FIGS. 5 and 11 to 19.

The film cassette 2 is provided with information for notifying the total number of film frames of the film 3 to be stored. This information is notified by the difference in the diameter of the shaft hole 99 of the film winding chamber 2b into which the spool shaft 49 is inserted. In this embodiment, a film 3 having a total of 20 film frames is used.
In addition to the film cassette 2 having the film cassette 2, the film cassette 2 having the film 3 having a total film frame number of 40 is selectively used. The diameter of the shaft hole 99 of the film cassette 2 whose total number of film frames is 20 is set to be larger than the diameter of the shaft hole 99 of the film or set 2 whose total number of film frames is 40 frames.

On the other hand, the spool shaft 49 is provided with a detection member 91 for detecting a difference in diameter of the shaft hole 99 of the film cassette 2.
It is provided to be rotatable and movable in the axial direction. An eighth spring 92 is provided between the detection member 91 and the camera body 1. The eighth spring 92 urges the detection member 91 in a direction away from the camera body 1 along the axis. On the lower surface of the detection member 91, that is, on the one surface with which the film winding chamber 2b abuts in the state where the film cassette 2 is accommodated, a first surface portion 91a and a second surface portion 91b that are staggered from each other are provided. It is provided. The first surface portion 91a is provided closer to the upper surface of the detection member 91, that is, the other surface, as compared with the second surface portion 91b. In addition, the first surface portion 91
The front end surface of the film winding chamber 2b of the film cassette 2 having a total film frame number of 20 is brought into contact with a, and the film cassette 2 having a total film frame number of 40 is brought into contact with the second surface portion 91b. The respective sizes are set so that the leading end surface of the film winding chamber 2b comes into contact with each other.

A film cassette 2 having a total of 20 film frames is stored in the cassette storage chamber. In this case, as shown in FIG. 5, the tip surface of the film winding chamber 2b engages with the first surface portion 91a of the detection member 91, and the eighth spring 9
The detection member 91 is held at the first detection position against the biasing force of 2. Also, the total number of film frames is 4 in the cassette storage room.
When 0 film cassette 2 is stored,
As shown in FIG. 11, the second surface portion 91 of the detection member 91.
The front end surface of the film winding chamber 2b is engaged with b, and the detection member 91 is held at the second detection position against the biasing force of the eighth spring 92. On the other hand, in the state shown in FIG. 12 in which the film cassette 2 is not stored in the cassette storage chamber,
The detection member 91 is biased by the eighth spring 92, abuts on the flange portion 100 formed substantially in the middle of the spool shaft 49, and is held at the third detection position.

The lower protrusion 93 of the cassette detection lever 87 described above is always engaged with the upper surface of the detection member 91. The cassette detection lever 87 is pivotally supported by the camera body 1 via a fifth shaft 97. Here, the cassette detection lever 87 is arranged at a position that does not hinder the rotation of the driven gear 48. The cassette detection lever 87 takes three detection rotation positions corresponding to the three detection positions of the detection member 91 to be engaged.

As shown in FIG. 17, the cassette detecting lever 87 has a notch 9 for allowing passage of the engaging portion 88 of the interlocking lever 85 described above when the cassette detecting lever 87 is in the first detection rotation position.
4 and a second rotation blocking portion 96 that does not allow passage of the engagement portion 88 when the engagement detection portion 88 is in contact with the second detection rotation position, as shown in FIG. As shown in FIG. 19, when this is in the third detection rotation position, the engaging portion 88 abuts and the engaging portion 88 is not allowed to pass through the first portion.
And a rotation blocking portion 95.

The cassette detection lever 87 has a fixed terminal 98a of a control switch 98 for transmitting information about the total number of film frames and information about no cassette to the control circuit 101, as shown in FIGS. 5, 11, and 12, respectively. Is fixed. The fixed terminal 98a is electrically connected to the control circuit 101. Further, when the cassette detection lever 87 is at the second detection rotation position, the first movable terminal 98b is at the position where the fixed terminal 98a comes into contact, and the cassette detection lever 87 is at the third detection rotation position. Fixed terminal 9
The second movable terminals 98c are arranged at the positions where the 8a contacts. These first and second movable terminals 9
8b and 98c are electrically connected to the control circuit 101, respectively. The fixed terminal 98a is not connected to any of the movable terminals 98b and 98c when the cassette detection lever 87 is in the first detection rotation position. The control switch 98 outputs a "0" signal when the cassette detection lever 87 is in the first detection rotation position, that is, when the total number of film frames of the film 3 is 20, and the cassette detection lever 87 is operated. When in the second detection pivot position,
That is, when the total number of film frames of the film 3 is 40, the "1" signal is output. The control circuit 101 judges that the film cassette 2 having a total of 20 film frames is stored while the “0” signal is input from the control switch 98, and the “1” signal is output from the control switch 98. In the input state, it is determined that the film cassette 2 having the total number of film frames of 40 is stored, and the signal is input from the control film 98 via the second movable terminal 98c. Then, it is determined that the film cassette 2 is not stored. Based on these judgments, the control circuit 101 controls the rotation amount of the second motor 8 for each frame.

Next, the idling mechanism 106 for the film 3 will be described below with reference to FIGS. 20 to 29.

First to fourth parts formed on the above-mentioned ratchet gear 52
The position detection holes 102 to 105 are arranged on the same circumference. The first and second position detection holes 102 and 103 are 7.
It is formed in an elongated shape with an opening of 5 °. The third and fourth position detection holes 104 and 105 are formed in a circular shape. The diameter of this circle is at least smaller than the pitch of one tooth of the ratchet gear 52. The center of the fourth position detection hole 105 is located 90 ° clockwise from the center of the third position detection hole 104. The center of the first position detection hole 102 is located at a position rotated by 116.25 ° clockwise from the center of the fourth position detection hole 105. The center of the second position detection hole 103 is located at a position rotated 45 ° clockwise from the center of the first position detection hole 102.

Below the ratchet gear 52 and on the same circumference as the above-mentioned first to fourth position detecting holes 102 to 105,
First to third detectors 107 as first detecting means
Through 109 are provided. Each detector 107 to 10
9 is the third or fourth position detection hole 104 or 10
It is set slightly higher than 5. The detector 108 is located 45 ° clockwise from the first detector 107, and the third detector 109 is located 45 ° clockwise from the second detector 108. Each is fixedly provided in the camera body 1. As shown in FIG. 25, when the display window 78 displays “21”, the first detector 107 faces the third position detecting hole 104, and
Of the third position detection hole 104 and the second position detection hole 105 are arranged so as to face the middle of the third position detection hole 104 and the fourth position detection hole 105, respectively. Has been done. Each of the detectors 107, 108 and 109 is composed of a light emitting element and a light receiving element. The lower surface of the ratchet gear 52 is formed to reflect light. Each of the detectors 107, 108, 109 includes a first to a fourth
Not facing any of the position detection holes 102 to 105 of
When facing the lower surface of the ratchet gear 52, the light from the light emitting element is reflected by the lower surface of the ratchet gear 52 and reaches the corresponding light receiving element. The light receiving element on which light is incident outputs a "1" signal. In addition, each detector 107, 10
Reference numerals 8 and 109 denote first to fourth position detection holes 102 to 1.
When any of the light-emitting elements is faced with the light-emitting element No. 05, the light from the light-emitting element is not reflected and does not reach the corresponding light-receiving element. The light receiving element to which light does not enter outputs a "0" signal. The first to third detectors 107 to 109 are respectively the inverter 1
It is connected to the control circuit 101 via 10. That is,
The control circuit 101 includes first to third detectors 107 to 10 facing any of the position detecting holes 102 to 105.
A “1” signal is input from 9.

As described above, the control circuit 101 controls the feed amount of the film 3 for each frame, that is, the rotation amount of the second motor 8 for each frame, and also controls the idle feed of the film 3. In addition to the control switch 98 being connected to the control circuit 101, a back cover switch 111 is also connected. The back cover switch 111 is opened when a back cover (not shown) is opened, outputs a "0" signal, and is closed when the back cover is closed and is "1". Output a signal. Further, the control circuit 101 includes a release switch 112.
Are connected via the shutter control circuit 113. The release switch 112 is closed by pressing a release button (not shown) and outputs a "1" signal. The shutter control circuit 113 receives the “1” signal from the release switch 112, rotationally drives the first motor 7 by a predetermined amount, and outputs a photographing end signal to the control circuit 101.

The control circuit 101 receives the photographing end signal and outputs a drive signal to the film winding drive mechanism 40 under the condition that the “1” signal is input from the back cover switch 111. Further, the control circuit 101 advances the stepping mechanism 37 by one frame when any two “1” signals are input from the first to third rotation amount detectors 107 to 109. Furthermore,
The control circuit 101 includes the first to third rotation amount detectors 107.
When a predetermined two "1" signals are input from Nos. 109 to 109, the film winding drive mechanism 40 is used to drive the film 3 by a predetermined number of frames, that is, by idling.

Here, when the number of frames drawn on the counter disk 51 is selectively displayed on the display window 78, each rotation amount detector 10
The signals input from 7, 108 and 109 to the control circuit 101 are as shown in Table 1. Here, the symbol A is the content of the output signal from the first rotation amount detector 107, the symbol B is the content of the output signal from the second rotation amount detector 108, and the symbol C.
Indicate the contents of the output signal from the third rotation amount detector 109, respectively.

That is, as understood from Table 1, the number of display frames is S, 2
In the case of three types of 1 and E, the control circuit 101 gives an instruction to skip.

On the other hand, the control circuit 101 includes a control switch 98 (hereinafter referred to as a symbol D
Based on the signals from the above (A), (B) and the signals from the above-mentioned A, B, and C, the total number of film frames is 40 (starting from the start position of 40 frames (that is, 40th frame)) 40
The middle position of the piece (that is, the 21st piece) (hereinafter indicated by 40M),
The end position of the total number of film frames is 40 (that is, E frame) (hereinafter indicated by 40E), the start position of the total number of film frames is 20 (immediately 21st frame) (hereinafter indicated by 20S), and the total number of film frames is End position of 20 frames (that is, E frame) (20E thereafter)
(Indicated by) are identified. This identification content is as shown in Table 2.

The input signal of the control circuit 101 is 40S, 40E, 2
When it is identified as 0S or 20E, the above-mentioned blank feed is performed for two frames, and when it is identified as 40M, the above-mentioned blank feed is performed for 6 frames.

The operation of the endoscope camera configured as described above will be described below.

First, the driving operation of the movable mirror section 5 will be described. When a release button (not shown) is pressed and operated, a release switch (not shown) is closed, and this release switch outputs a release signal to the control circuit 101. The control circuit 101 receives the release signal and outputs it as a drive signal to a drive circuit (not shown) of the first motor 7. The drive circuit receives the drive signal and rotates the first motor 7 counterclockwise by a predetermined amount and stops it. This rotation is transmitted to the mirror operating cam 16 via the gear train (12 to 15) of the mirror driving mechanism 10, and the mirror operating cam 16 rotates counterclockwise. By this rotation, the driven roller 30 of the movable mirror portion 5 is released from the state of being engaged with the cam surface of the mirror actuating cam 16 at the farthest position, and is in the state of being engageable with the cam surface of the latest position, that is, no restriction is made. I will not receive it. Therefore, the second
Due to the urging force of the spring 26, the movable mirror portion 5 rotates counterclockwise from the first position around the pivot pin 24. Then, as shown in FIG. 3, at the second position where the tip of the movable mirror portion 5 contacts the mirror stopper 35, the position is maintained. In this state, the driven roller 30 is not in contact with the cam surface of the mirror actuating cam 16 at the most recent position.

Since the movable mirror unit 5 also has a shutter function,
By being held in the second position, the openings 4a, 33
Photographing light from the subject exposes the film 3 via a, 33b, and 33c. When the predetermined photographing operation is completed, the drive signal is output again from the drive circuit, and the first motor 7 starts rotating again in the counterclockwise direction. Therefore, the driven roller 3
The cam surface of the mirror actuating cam 16 is engaged with 0. The driven roller 30 is regulated by the cam surface and gradually pressed in the clockwise direction, and the movable mirror portion 5 rotates from the second position to the first position against the first spring 26.

When the driven roller 30 comes into contact with the farthest cam surface of the mirror actuating cam 16, that is, when the movable mirror portion 5 reaches the first position, the detected portion provided on the second protrusion 27 is detected. 29 faces the detection unit 28 provided on the mounting piece 19. Therefore, the light emitted from the light emitting element of the detection section 28 is reflected by the reflection mirror of the detected section 29 and reaches the light receiving element. The light receiving element to which the light is incident outputs a stop signal to the drive circuit, and the drive circuit stops the driving of the first motor 7. That is, the movable mirror unit 5 stops at the first position and maintains that position.

In this way, when the driving of the series of movable mirror units 5 is completed, the control circuit 101 then instructs the winding operation of the film 3. That is, the control circuit 101 outputs a drive signal to the drive circuit of the second motor 8. The drive circuit receives the drive signal and rotates the second motor 8 in the counterclockwise direction as shown in FIG. This rotation is performed by the film winding drive mechanism 40.
Is transmitted to the spool shaft 49 via the gear trains (41 to 48) of, and the spool shaft 49 rotates counterclockwise. In response to the rotation of the spool shaft 49, the film 3 having been photographed is started to be wound into the film winding chamber 2b.

Here, the detector 50 that detects the through holes 39 of the film feed amount detection gear 42 sends the detected number of through holes 39 as a pulse to the control circuit 101, and the control circuit 101 counts the number of pulses. Then, according to the detection of the total number of film frames from the control switch 98, the set pulse number,
The control circuit 101 determines the amount of rotation of the second motor 8 from the number of frames that have been photographed so that the film 3 is fed at a constant number of frames, and the number of pulses from the detector 50 is A stop signal is output to the drive circuit when the number of pulses matches the determined number of pulses. Therefore, the second motor 8 stops driving, and the winding of one frame of the film 3 is completed. here,
The number of pulses determined by the control circuit 101 gradually decreases as the winding of the film 3 progresses, and
Even if the total number of film frames is 40 and 20, the number of pulses is set differently even if the number of film frames is the same due to the difference in shaft diameter. In this way, the constant-size feeding of the film 3 is realized, which is constant regardless of the number of shooting frames.

Next, the stepping operation of the piece counter 38 will be described.

As described above, the movable mirror unit 5 is reciprocally rotated from the first position to the second position, whereby the sixth position is obtained.
One side edge 59 of the mirror bracket 21 on the side of the film winding chamber 2b shown in FIGS. 8 and 10 moves from the state shown in FIG. 6 to the direction shown by the arrow A, and the state shown in FIG. And the state shown in FIG. 8 is reciprocated. That is, first, as the one side edge 59 moves from the state shown in FIG. 6 in the direction shown by the arrow A, the step base lever 55 engaged with the one side edge 59 is shown in FIG. Thus, the urging force of the second spring 60 causes it to rotate counterclockwise. Therefore, the step lever 61 attached to the step base lever 55 also rotates counterclockwise via the second shaft 63. At this time, the step claw 53 fixed to one end of the step lever 61 is engaged with the ratchet gear 5 that has been engaged until then.
The second tooth, which is adjacent to the second tooth in the clockwise direction, overcomes the biasing force of the third spring 64 and engages with the next tooth. Here, since the stopper claw 54 is still engaged with the teeth of the ratchet gear 52, the ratchet gear 52 does not rotate.

Next, in response to the one side edge 59 moving from the state shown in FIG. 8 in the direction opposite to the direction indicated by the arrow A, the step base lever 55 engaged with the one side edge 59 is As shown in FIG. 9, against the biasing force of the second spring 60,
Rotate clockwise. Therefore, the step lever 61 also rotates clockwise. At this time, the step claws 53 are attached to the ratchet gear 5.
Since it is not possible to get over two teeth, the ratchet gear 52 rotates counterclockwise by one tooth in response to the clockwise movement of the step claw 53 against the biasing force. Therefore, the display window 78 is one of the numbers of frames drawn on the counter disc 51.
Displays the number of pieces obtained by subtracting one from the number of pieces displayed previously.
Here, since the stopper claw 54 and the ratchet gear 52 are configured to allow rotation in the clockwise direction but not in the counterclockwise direction, the counterclockwise rotation of the ratchet gear 52 is not allowed. In response to the rotation of one tooth in the direction, against the biasing force of the fourth spring 68, the next tooth adjacent in the clockwise direction gets over and engages, and again functions as a stopper.

Next, the operation of resetting the display of the frame counter 38 will be described. When the film cassette 2 is taken out from the camera body 1 in the state where the film 3 is completely photographed or during the photographing, the back cover is first opened. With the opening of the back cover, the back cover lever 72 moves in the direction indicated by arrow B. Therefore, the back cover interlocking lever 70 that engages with the back cover lever 72 is moved by the urging force of the sixth spring 18.
As shown in FIG. 10, it rotates clockwise. By this rotation, the engagement of the pin 75 of the back cover interlocking lever 70, which has been engaged with the one side portion 76 of the claw release lever 36, is released. Therefore, the pawl release lever 36 moves the fifth spring 6
It is rotated counterclockwise by the biasing force of 9. By this rotation, the standing piece 56 of the pawl release lever 36 is engaged with the released arm 65 of the step lever 61 and the intermediate portion of the stopper lever 66, respectively, and the step lever 61 is moved to the third spring 6.
4 against the urging force of 4 and the stopper lever 6
6 is rotated counterclockwise against the biasing force of the fourth spring 68. Therefore, the stopper claw 54 and the stepping claw 53 are released from the engagement state with the teeth of the ratchet gear 52, respectively. That is, when the back cover is opened, the ratchet gear 52 becomes free, and the biasing force causes the ratchet gear 52 to rotate clockwise until the stopper pin 80 comes into contact with the locking piece 82, and the display of the number of pieces counter 38 is indicated. Is reset.

Next, the setting operation of the total number of film frames will be described. As described above, when the back lid is opened, the back lid interlocking lever 70 rotates clockwise from the state shown in FIG. 13, and the interlocking lever 85 that engages with the operating portion 74 of the back lid interlocking lever 70 slides. The contact portion 90 is pushed in, and as shown in FIG. 14, the interlocking lever 85 is moved counterclockwise against the biasing force of the seventh spring 89. Here, since the film cassette 2 is not stored in the cassette storage chamber, the cassette detection lever 87 takes the third detection rotation position as shown in FIG. First
The rotation blocking portion 95 is located. Therefore, as shown in FIG. 14, the engaging portion 88 of the interlocking lever 87 abuts on the left side surface of the first rotation blocking portion 95 in the figure and maintains its position.

From the state shown in FIG. 14, the case where the film cassette 2 having the film 3 of which the total number of film frames is 20 is stored in the cassette storage chamber will be described below. A large-diameter shaft hole 99 that informs that the total number of film frames is 20.
By accommodating the film winding chamber 2b having the above in the accommodating chamber, the detecting member 91 resists the urging force of the eighth spring 92 and is shown from the third detecting position shown in FIG. 12 to that shown in FIG. Move to the first detection position. Therefore, the cassette detection lever 87 engaged with the detection member 91 rotates to the first detection rotation position. That is, as shown in FIG.
The notch 94 is provided in the moving range of the engaging portion 88 of the interlocking lever 85.
Will be located. Therefore, from the state shown in FIG. 14, the engaging portion 88 of the interlocking lever 85 passes through the cutout portion 94, and the engaging portion 73 of the back lid interlocking lever 70 is moved to the back lid as shown in FIG. The back cover interlocking lever 70 rotates until it abuts the lever 72.

When the back cover is closed in the state shown in FIG. 15, the back cover lever 72 moves in the direction opposite to the direction indicated by the arrow B. Therefore, the back cover interlocking lever 70 rotates counterclockwise to the position shown in FIG. 13 against the biasing force of the sixth spring 18. Here, the cassette detection lever 87
As shown in FIG. 17, the interlock lever 85 can pass through the notch 94 again because it is in the first detection rotation position.
That is, the sliding contact portion 90 of the interlocking lever 85 is the back cover interlocking lever 7
No. 7 actuating portion 74 is in sliding contact with the seventh spring 8
The urging force of 9 causes the interlocking lever 85 to rotate to the position shown in FIG. In this state, the display window 78 displays "21".

Next, from the state shown in FIG. 14, a case where the film cassette 2 having the film 3 of 40 film frames in total is stored in the cassette storage chamber will be described below. By accommodating the film winding chamber 2b having the shaft hole 99 for notifying that the total number of film frames is 40, the detection member 91 resists the biasing force of the eighth spring 92, It moves from the third detection position shown in FIG. 12 to the second detection position shown in FIG. 11 through the first detection position shown in FIG. Here, the cassette detection lever 87 that engages with the detection member 91 rotates from the third detection rotation position to the second detection rotation position through the first detection rotation position. That is, as shown in FIG. 17, after the notch 94 is once located in the movement range of the engaging portion 88 of the interlocking lever 85, the second rotation blocking portion 96 is moved as shown in FIG. Come to be located. Therefore, first, from the state shown in FIG. 14, the engaging portion 88 of the interlocking lever 85 has the notch portion 94 when the notch portion 94 crosses the moving range of the engaging portion 88.
15 through the back cover interlocking lever 70, as shown in FIG.
The interlocking lever 85 rotates further in the counterclockwise direction until the engaging portion 73 comes into contact with the back cover lever 72. Then, in the movement range of the engaging portion 88, the second rotation blocking portion 96 is located after the notch portion 94 has crossed.

When the back cover is closed in the state shown in FIG. 15, the back cover lever 72 moves in the direction opposite to the direction indicated by the arrow B. Therefore, the back cover interlocking lever 70 rotates counterclockwise to the position shown in FIG. 16 against the biasing force of the sixth spring 18. Here, the cassette detection lever 87
18, the engaging portion 88 of the interlocking lever 85 contacts the right side surface of the second rotation blocking portion 96 of the cassette detecting lever 87 in the figure, as shown in FIG. contact,
It resists the biasing force of the seventh spring 89 and stays in its abutting position. In this state, the display window 78 displays "S".

In this way, the pin 75 of the back cover interlocking lever 70, which moves counterclockwise in response to the closing of the back cover after the number of all film frames is displayed in the display window 78, causes the pawl release lever 36 to move.
It abuts on one side portion 76. Then, the pin 75 pushes in this one side portion 76, and the pawl release lever 36 rotates clockwise against the biasing force of the fifth spring 69. Therefore, the standing piece 56 no longer presses the stopper lever 66 and the stepping lever 61 to regulate them. That is, the step lever 61 is rotated counterclockwise by the biasing force of the third spring 64, and the step claw 53 is engaged with the tooth of the ratchet gear 52. Further, the stopper lever 66 is rotated clockwise by the urging force of the fourth spring 68 to engage the stopper claw 54 with the tooth of the ratchet gear 52. In this state, the counter disk 51 of the piece counter 38 is in the step enabling state.

Next, the idling operation of the film 3 will be described below.
First, the case of using the film cassette 2 having the film 3 having a total of 20 film frames will be described. As described above, when the film cassette 2 is stored in the cassette storage chamber, the cassette detection lever 87 rotates from the third rotation detection position to the first rotation detection position, and the control switch 98, that is, D. Outputs a “0” signal to the control circuit 101
Output to. Then, by closing the back cover, the back cover switch 111 is closed and outputs a “1” signal to the control circuit 101.

In this state, the frame counter 38 displays "21" on the display window 78. On the other hand, in this state, as shown in FIG.
Of the rotation amount detector 107, that is, the third position detection hole 1 in A.
04 face each other, no position detection holes face the second rotation amount detector 108, that is, B, and a fourth position detection hole does not face the third rotation amount detector 109, that is, C. 105 are facing each other. Therefore, the control circuit 101 receives the “1” signal from A, the “0” signal from B, and the “1” signal from C, respectively. Since two "1" signals have been input, the control circuit 101 determines to idle the film 3. Here, in response to the "0" signal from D, the control circuit 101 identifies that it is in the state of 20S, drives the step mechanism 37, and advances the counter disk 51 by one frame. Then, the film winding drive mechanism 40 is driven to drive the film by two frames. Due to this idle feeding, a leading portion where nothing is photographed is formed at the start end of the film 3.

On the other hand, as the counter disc 51 advances, the display window 78 displays "20". In this state, as shown in FIG. 26, the first to third rotation amount detectors 107 to 109 are provided.
Does not face any of the detection holes 102 to 105,
Each of A, B and C outputs a "0" signal. Therefore,
No blank feed is made. Further, in this state, the photographing standby state is set.

After that, by closing the release switch 112, the photographing operation is performed as described above. In this way 1
When 9 frames have been photographed, the state shown in FIG. 27 is reached and the display window 78 displays "1". That is, it is displayed that the number of remaining frames that can be photographed is one. In this state, A, B, and C do not face any of the detection holes.
Therefore, no blank feed is performed.

From here, press the release switch 112 and press the last one.
When the images have been taken, the display window 78 displays "E" as shown in FIG. In this state, A does not face any position detection hole, B faces the first position detection hole 102, and C faces the second position detection hole 103. Therefore, the control circuit 101 receives the “0” signal from A, the “1” signal from B, and the “1” signal from C, respectively.
Since two "1" signals have been input, the control circuit 101 determines to idle the film 3. On the other hand, the control circuit 101 receives the “0” signal from D, and receives 20E
The film winding drive mechanism 4
0 is driven, and two frames are preliminarily fed. Due to this idle feeding, a trailing portion where nothing is photographed is formed at the end of the film 3.

In this state, the photographing on the film 3 is completed.

Next, the case of using the film cassette 2 having the film 3 of which the total number of film frames is 40 will be described. As described above, when the film cassette 2 is stored in the cassette storage chamber, the cassette detection lever 87 moves to the third position.
From the rotation detection position to the second rotation detection position, and
Outputs a “1” signal to the control circuit 101. Then, by closing the back cover, the back cover switch 111 is closed and outputs a “1” signal to the control circuit 101.

In this state, the frame counter 38 displays "S" on the display window 78. On the other hand, in this state, as shown in FIG. 22, the first position detecting hole 102 faces A, the second position detecting hole 103 faces B, and any position detecting hole C faces. Don't even face. Therefore, the control circuit 101 receives the "1" signal from A, the "1" signal from B, and the "0" signal from C, respectively. Since two "1" signals have been input, the control circuit 101 determines to idle the film 3. Here, the control circuit 101 receives the "1" signal from D, identifies that it is in the state of 40S, drives the stepping mechanism 37, and advances the counter disk 51 by one frame. The film winding drive mechanism 40 is driven to feed the two frames in advance. Due to this idle feeding, a leading portion in which nothing is photographed is formed at the start end of the film 3.

On the other hand, as the counter disk 51 advances, the display window 78 displays "40". In this state, as shown in FIG. 23, A, B, and C are all of the detection holes 102 to 105.
However, all of A, B, and C output a "0" signal. Therefore, no blank feed is made. Further, in this state, the photographing standby state is set.

After that, by closing the release switch 112,
The photographing operation is performed as described above. In this way
When 19 frames are photographed, the state shown in FIG. 25 is reached and the display window 78 displays "21". In this state, A
And C output a "1" signal, and B outputs a "0" signal. Therefore, the control circuit C101 determines to carry out idle feeding. Here, since the "1" signal is input from D,
The control circuit 101 identifies that it is 40M. When the control circuit 101 identifies that the current is 40M, it does not directly instruct the idling operation but determines whether or not the release operation is performed, and after the release operation is performed, the idling for 6 frames is driven. To do. Due to this blank feed, a blank feed section in which nothing is photographed is formed between the 21st frame and the 20th frame.

By performing the release operation from the 21st frame, 40
In the state in which the blank feeding in M is completed, as shown in FIG. 26, the display window 78 displays "20".

After that, when 19 frames are photographed, the display window 78 displays "1" as shown in FIG. From this state, when two more frames are photographed, the display window 78 displays "E" as shown in FIG. In this state, A outputs a "0" signal, and B and C output a "1" signal. Receiving these signals, the control circuit 101 determines the idling. Also, 40E is identified together with the "1" signal from D, and the film 3 is fed by two frames. Due to this idle feeding, a trailing portion where nothing is photographed is formed at the end of the film 3.

As described above, according to this embodiment, the ratchet gear 52, that is, the counter circle, is detected by the first to third rotation applying detectors 107 to 109 through the first to fourth position detecting holes 102 to 105. The rotating position of the plate 51 can be detected. In other words, the number of frames selectively displayed on the display window 78 of the total number of frames 38 can be taken out as an electric signal corresponding to this number of frames.

Further, the difference in the total number of film frames is made to correspond to the difference in the diameter of the shaft hole 99 of the film cassette 2, and the difference in the diameter is detected by the cassette detection lever 87 via the detection member 91, that is, the type of the total number of film frames. Can be extracted as an electric signal corresponding to this type.

As a result, in the control circuit 101, based on these both electric signals, the photographing frame is changed to 40S, 40M, 40E, 2
It is determined whether it is 0S or 20E, and at these times, the film 3 is driven via the film winding drive mechanism 40.
To feed in the air. At this time, in the case of 40M, that is, in the middle portion of the long film, the idle feed control for 6 frames is performed. Four
0S, 40E, 20S, 20E, that is, the leading and trailing parts at the start and end of the film,
Performs jump feed control for two frames.

Therefore, at the start of shooting, the unexposed portion that has been idle-fed has reached the shooting possible position, and there is no risk of shooting with the exposed film when the film is attached. Further, at the end of photographing, the frame portion that has already been photographed is further fed in advance, so there is no fear that the frame portion that has already been photographed will be further exposed when the film is removed. Further, in the case of a long film in which the total number of film frames is 40, six frames of empty feed portions are formed between the 21st frame and the 20th frame during shooting. By forming the blank feed section, the film can be cut in the middle of the blank feed section to form a short film having two 20 frames. That is, even without newly preparing an automatic developing system or filing system for a film having a total film number of 40 frames, the automatic developing system or a filing system for a film having a total film frame number of 20 can be used as it is. Can be used. At this time, the idle feed section of 40M is set for 6 frames, so by cutting in the middle,
A trailing portion and a leading portion for three frames are left on each of the two divided short films. Therefore, when the film is gripped by the automatic developing system, the trailing portion and the leading portion of the film may be gripped, and there is no risk of gripping the photographed frame portion near the cutting portion and damaging it.

Furthermore, the timing of jump feed and the number of jump feeds can be displayed on the display window 7
Since the number of frames displayed on 8 is detected and controlled, it is not necessary to provide the counter disk 51 of the frame counter 38 with a protrusion for controlling the idle feed. Therefore, on the counter disk 51, the number-of-pieces symbols are continuously arranged at equal intervals, and if they are arranged around the counter disk, the number-of-pieces symbols are more numerous than in the conventional case. It becomes possible to form a large size. As a result, the number-of-frames symbol displayed in the display window 78 is easy to read, and misreading is prevented.

In addition, in the above-described embodiment, the long film has been described as being used for taking 40 frames, but it goes without saying that the number of frames is arbitrarily set.

As described above in detail, the film feeding apparatus according to the present invention detects the number of frames displayed selectively on the frame number counter and outputs the detection signal corresponding to the number of frames. ,
Second detecting means for detecting the total number of film frames of the stored film and outputting a signal corresponding to the total number of film frames, a winding mechanism for winding the film, and first and second winding mechanisms. And a control circuit for controlling the film winding amount based on both detection signals from the detection means, and winding the film at the winding amount determined by the control circuit. I am trying. Therefore, it is possible to control the idle feed without providing a protrusion on the frame number plate, and it is possible to provide a film feed device for a camera that makes the frame number meter easy to see.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing the internal structure of an endoscopic camera equipped with a film feeding device according to an embodiment of the present invention, and FIG. 2 is a mirror drive mechanism and movable part of the camera shown in FIG. FIG. 3 is a cross-sectional view showing the mirror portion taken out, FIG. 3 is a cross-sectional view showing the mechanism shown in FIG. 2 in different operating states, and FIG. 4 is a plan view showing the film winding mechanism of the camera shown in FIG. FIG. 5 is a sectional view showing the mechanism shown in FIG. 4 taken along the line VV, and FIG. 6 is a plan view showing the frame counter and step mechanism of the camera shown in FIG. , FIG. 7 is a cross-sectional view of the frame counter shown in FIG. 6, and FIGS.
6 is a plan view showing the mechanism shown in FIG. 6 in different operating states, FIG. 11 and FIG. 12 are sectional views showing the detecting member shown in FIG. 5 in different operating states, and FIG. FIG. 14 is a plan view showing the setting mechanism for taking out the total number of film frames of the camera shown in FIG. 1, and FIG.
FIGS. 17 to 19 are plan views showing the mechanisms shown in different operating states, FIGS. 17 to 19 are sectional views showing the cassette detecting lever shown in FIG. FIG. 21 is a perspective view showing an embodiment of a film feeding device according to the invention, FIG. 21 is a plan view of a ratchet gear showing the arrangement of a position detection hole and a rotation amount detector, and FIGS. 22 to 28 are rotation amounts, respectively. FIG. 29 is a plan view showing different detection states of the detector, and FIG. 29 is a flow chart showing the operation of the film feeding device. 3 ... Film, 38 ... Total frame number, 77 ... Frame number symbol, 87 ...
Cassette detection lever, 98 ... Control switch, 101 ... Control circuit, 102 to 106 ... Position detection holes, 107 to 1
09 ... Rotation amount detector.

Continuation of the front page (56) References JP-A-57-13438 (JP, A) JP-A-50-113222 (JP, A) Jitsuko Shou-51-19860 (JP, Y2)

Claims (1)

[Claims] 1. A first unit for detecting the number of selectively displayed frames of a frame number counter and outputting a plurality of detection signals corresponding to the number of frames.
Detecting means, a second detecting means for detecting the total number of film frames of the stored film, and outputting a signal corresponding to the type of the total number of film frames, a winding mechanism for winding the film, and the winding mechanism. The mechanism is controlled based on the combination of both detection signals from the first and second detection means, and it is determined that the film idle feed amount is changed between the predetermined frame number and the final frame number according to the total number of film frames. A film feeding device for a camera, comprising: a control circuit for controlling the film, and winding the film by a winding amount determined by the control circuit.