JP2001154249A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize an entire camera by forming space for arranging one part of a finder unit ahead of an opening/closing driving member opening/ closing the light shielding door of a film cartridge and a gear member constituting a film feeding mechanism by arranging the gear member coaxially with the turning center of the opening/closing driving member. SOLUTION: This camera is provided with the film feeding mechanism in which the film cartridge having the light shielding door for a film entrance is loaded and which drives and feeds the film of the loaded film cartridge, and the opening/closing driving member 20 which turns to open/close the light shielding door. In the camera, the gear member 18 constituting the film feeding mechanism is arranged coaxially with the center of turning of the member 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera capable of loading a film cartridge having a light-shielding door at a film entrance, and more particularly, to a member for driving the light-shielding door to open and close and a film supply film. This relates to the arrangement relationship with a film feeding mechanism for feeding.

[0002]

2. Description of the Related Art In a conventional camera, a reduction gear train (film feeding mechanism) for feeding a film is disclosed in JP-A-9-2.
As proposed in Japanese Patent No. 11618, a part of a reduction gear train is arranged in front of a light-shielding door opening / closing gear for opening and closing a light-shielding door of a film cartridge.

In a compact camera such as a so-called lens shutter camera, a finder unit is often arranged in a space between a film cartridge loading chamber and a film winding spool chamber in an upper portion of a camera body. In some cases, the distance measuring elements (light projecting unit and light receiving unit) are integrally held on the left and right sides of the viewfinder optical system in the viewfinder unit.

[0004]

However, when a finder unit having a distance measuring element is arranged in a camera in which a part of a reduction gear train is arranged in front of a light-shielding door opening / closing gear as described above. In addition, it is necessary to dispose the finder unit so as to avoid the reduction gear disposed in front of the light shielding door opening / closing gear.

[0005] As a method of arranging the finder unit avoiding the reduction gear, there are a method of arranging the finder unit above a reduction gear arranged in front of the light-shielding door opening / closing gear, and a method of winding the film cartridge loading chamber and winding up in the camera body. A method of disposing the finder unit along a reduction gear disposed in front of the light-shielding door opening / closing gear after widening the interval with the spool chamber may be considered. But,
Either of these methods has a problem that it hinders downsizing of the camera.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a camera capable of opening and closing a light shielding door of a film cartridge without causing a problem in a film feeding operation while reducing the size of the camera.

[0007]

In order to achieve the above object, according to the present invention, a film cartridge having a light-shielding door at a film entrance and exit can be loaded, and a film for feeding and driving the film of the loaded film cartridge is provided. In a camera having a feeding mechanism and an opening / closing drive member that rotates to open and close the light-shielding door, a gear member that constitutes the film feeding mechanism is disposed coaxially with a rotation center of the opening / closing drive member. .

More specifically, when the opening / closing drive member has a transmission portion for transmitting a driving force from a member other than the gear member in the film feeding mechanism, the gear member is pivoted to the transmission portion of the opening / closing drive member. At a position overlapping in the direction, the film feeding mechanism is rotatably attached to a shaft portion of the opening / closing drive member or to a shaft portion provided on a holding member which presses and holds the film feeding mechanism against the camera body.

Thus, a space is provided near the front of the opening / closing drive member and the gear member for disposing a part of the finder unit (for example, a distance measuring element disposed on at least one side of the finder optical system). It is possible to arrange the finder unit closer to the film cartridge loading chamber without disposing the finder unit above the gear member and widening the space between the film cartridge loading chamber and the winding spool chamber as in the past. Becomes possible. Further, it is also possible to arrange a member constituting an opening / closing mechanism of the light shielding door of the opening / closing drive member near the front of the opening / closing drive member and the gear member. Therefore, it is effective to reduce the size of the camera.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIGS. 1 to 7 show the configuration of a camera according to a first embodiment of the present invention. FIG. 1 is an exploded perspective view showing the configuration of a film feeding mechanism and a light shielding door opening / closing mechanism, and FIG. 2 is a light shielding door opening / closing gear constituting the light shielding door opening / closing mechanism and a reduction gear train constituting the film feeding mechanism. FIG. 3 is a perspective view of a film cartridge, FIG. 4 is an exploded perspective view showing a configuration of a cartridge chamber cover opening / closing mechanism, FIG. 5 is an exploded perspective view showing a main unit configuration of a camera, and FIG. FIG. 7 is a plan view showing a state in which the above-described reduction gear train is incorporated in the main body.
FIG. 4 is a plan view showing a state where a finder unit and a strobe light emitting unit are incorporated in the state shown in FIG.

First, the film feeding mechanism will be described. 1 to 3 and 6, reference numeral 1 denotes a camera body, on the left and right of which are provided a film cartridge loading chamber 1a and a take-up spool chamber 1b.

Reference numeral 2 denotes a feed motor, which is used as a drive source for driving film winding and rewinding and for driving film feeding from the inside of the film cartridge 50 containing the film leader unit to the winding spool chamber 1b.

The feeding motor 2 is fixed to a motor base plate 5 by two screws 4. Further, a pinion gear 3 is press-fitted into the tip of the feeding motor 2.

The motor base plate 5 holds the feeding motor 2 fixed as described above, and is fixed to the upper surface of the winding spool chamber 1b of the camera body 1 by two screws 6.

Reference numerals 7 to 19 denote gears constituting a film feed gear train, which are arranged on the upper surface of the camera body 1.

Reference numeral 7 denotes a hoisting gear, in which a large gear 7a and a small gear (not shown) are integrally formed. The hoisting gear 7 is rotatably fitted and supported on a gear shaft 5 a formed on the motor base plate 5, and is held down and held by the motor base plate 5 by a hoisting gear pressing plate 8. The driving force of the feeding motor 2 is transmitted to the hoisting gear 7 by engaging the large gear 7 a with the pinion gear 3. Note that the hoisting gear pressing plate 8 is fixed to the motor ground plate 5 by screws 9.

Reference numeral 10 denotes a sun gear in which a large gear 10a and a small gear 10b are integrally formed. This sun gear 10 is arranged above the planetary gear unit 11,
It is rotatably fitted and supported on a gear shaft 1 c formed on the camera body 1, and is held down and held on the camera body 1 by a winding gear pressing plate 8. The driving force of the feeding motor 2 is transmitted to the sun gear 10 by engaging the large gear 10 a with the small gear of the hoisting gear 7.

The planetary gear unit 11 includes the sun gear 1
0, a planetary gear 1 rotatably fitted and supported on a gear shaft 1c of the camera body 1 with which the sun gear 10 is fitted.
1a. The planetary gear 11 a is pressed and held by the camera body 1 by the hoisting gear pressing plate 8.

The driving force of the feeding motor 2 is transmitted to the planetary gear unit 11 when the planetary gear 11a meshes with the small gear 10b of the sun gear 10. The planetary gear unit 11 to which the driving force is transmitted rotates clockwise about the gear shaft 1 c of the camera body 1, so that the planetary gear 11 a meshes with the gear 12 a of the hoisting spool 12.
Further, the planetary gear unit 11 rotates counterclockwise around the axis 1c of the camera body 1 so that the planetary gear 11
a meshes with a first rewind gear 13 described later.

Reference numeral 12 denotes a take-up spool, which is rotatably fitted and supported in holes 1d and 1e formed in the upper and lower end portions of the take-up spool chamber 1b of the camera body 1, and held by the camera body 1 by the motor base plate 5. I have. The hoisting spool 12 has a planetary gear 1 of a planetary gear unit 11 that rotates clockwise to a gear 12a formed at the upper end thereof.
The driving force of the feeding motor 2 is transmitted by the meshing of 1a. The take-up spool 12 to which the driving force has been transmitted rotates clockwise, and takes up the film sent from the film cartridge 50 in the take-up spool chamber 1b.

The first rewind gear 13 is rotatably fitted and supported on a gear shaft 1 f formed on the camera body 1, and is held on the camera body 1 by the motor base plate 5. This first
The driving force of the feeding motor 2 is transmitted to the rewind gear 13 by meshing with the planetary gear 11a of the planetary gear unit 11 rotated in the counterclockwise direction.

Reference numeral 14 denotes a clutch gear unit.
a, 14b, and 14c, and a spring (not shown) disposed between the gears 14b and 14c. The lower end of the shaft portion of the clutch gear unit 14 is rotatably fitted and supported in a hole 1g formed in the camera body 1, and the upper end is rotatably fitted in a hole (not shown) formed in a finder unit 44 described later.

In the clutch gear 14, the gear 14a meshes with the sun gear 10, the gear 14b meshes with the sun gear 10, and the gear 14c meshes with the second rewind gear 15, so that the driving force of the feeding motor 2 is increased. Is transmitted.

Reference numeral 15 denotes a second rewind gear, 16 denotes a third rewind gear, and 17 denotes a fourth rewind gear. 4th rewind gear 1
Reference numeral 7 denotes a large gear 17a and a small gear 17b formed integrally. The second to fourth rewind gears 15 to 17 are rotatably fitted and supported on gear shafts 1h, 1i, 1j formed on the camera body 1, respectively.

Second rewind gear 15 and third rewind gear 16
The fourth rewind gear 17 is held down and held by the camera body 1 by a later-described finder unit 44, and the fourth rewind gear 17 is held by a gear holding plate 27 described later.

The second rewind gear 15 is the gear 14c of the clutch gear unit 14, the third rewind gear 16 is the second rewind gear 15, and the small gear 17b of the fourth rewind gear 17
Are meshed with the third rewind gear 16, so that the driving force of the feed motor 2 is transmitted to each.

Numeral 18 denotes a fifth rewinding gear, as shown in FIG.
And is located between. This fifth rewind gear 18
It is rotatably fitted and supported on a support shaft 20c formed coaxially with the rotation center axis of the light shielding door opening / closing gear 20, and is attached to the light shielding door opening / closing gear 20 by a gear pressing plate 27 described later (that is, to the camera body 1). On the other hand, it is held down. The driving force of the feed motor 2 is transmitted to the fifth rewind gear 18 by meshing with the large gear 17 a of the fourth rewind gear 17.

A fork gear 19 has a downwardly extending engaging portion 19a rotatably fitted to the inner periphery of a cylindrical rib 1k formed on the upper surface of the film cartridge loading chamber 1a of the camera body 1. And a gear holding plate 2 to be described later.
7 presses and holds the camera body 1.

The engagement portion 19a of the fork gear 19 has
It penetrates the inner periphery of the rib 1k, protrudes into the film cartridge loading chamber 1a, and engages with the spool 50a of the film cartridge 50 loaded in the film cartridge loading chamber 1a. The driving force of the feed motor 2 is transmitted to the fork gear 19 by meshing with the fifth rewind gear 18. The fork gear 19 to which the driving force has been transmitted drives the spool 50a of the film cartridge 50.

When the fork gear 19 rotates clockwise and the spool 50a is driven to rotate in the same direction, the film is taken up from the inside of the film cartridge 50 through the film inlet / outlet provided in the film cartridge 50. It is sent to the chamber 1b. Further, when the fork gear 19 rotates counterclockwise and the spool 50a is driven to rotate in the same direction, the film is wound into the film cartridge 50.

Next, the light shielding door opening / closing mechanism will be described.
1 to 3, reference numeral 20 denotes a light-shielding door opening / closing gear (opening / closing drive member) for opening and closing a light-shielding door 50b that opens and closes a film entrance and exit of the film cartridge 50.

As shown in FIG. 2, the light-shielding door opening / closing gear 20 has a rotation center axis extending in a vertical direction.
Coaxially with the rotation center axis, a light-shielding door opening / closing shaft 20a extending downward and a support shaft 20c extending upward are provided. The light-shielding door opening / closing gear 20 is such that the portion immediately above the light-shielding door opening / closing shaft 20 a is the film cartridge loading chamber 1
a, and the support shaft 20c is rotatably fitted into a fitting hole 27a formed in a gear holding plate 27, which will be described later.
It is rotatably supported.

The light-shielding door opening / closing shaft 20a protrudes into the film cartridge loading chamber 1a through the hole 11 of the camera body 1, and the light-shielding door opening / closing part 50c of the film cartridge 50 loaded in the film cartridge loading chamber 1a.
Engage with.

A fifth rewind gear 18 constituting a reduction gear train of the film feeding mechanism is rotatably fitted on the outer periphery of the support shaft 20c. Further, the light shielding door opening / closing gear 20
A gear portion (transmission portion) 20b is formed between the light-shielding door opening / closing shaft 20a and the support shaft 20c, and meshes with the gear 21a of the drive ring 21. Therefore, when the drive ring 21 rotates, the light shielding door opening / closing gear 20 is rotationally driven.

The drive ring 21 is rotatably fitted and supported on the outer periphery of a cylindrical rib 1k formed on the upper surface of the film cartridge loading chamber 1a in the camera body 1, and is attached to the camera body 1 by the fork gear 19. It is held down. On the outer periphery of the drive ring 21, a gear 21a, a notch 21b, and a drive shaft 21c are formed. The gear 21a is the gear 20 of the light shielding door opening / closing gear 20.
By engaging with b, the rotational power of the drive ring 21 is transmitted to the light shielding door opening / closing gear 20. The notch 21b can be disengaged from the lock claw 22a of the lock lever 22. The drive shaft 21c is provided with a notch 34 of an opening / closing lever 34 described later.
a.

The lock lever 22 is provided with a notch 21b of the drive ring 21 for preventing the rotation of the drive ring 21.
Can be engaged. The lock lever 22 is rotatably fitted and supported on a lever shaft 1m formed on the upper surface of the film cartridge loading chamber 1a in the camera body 1, and is held down and held by the camera body 1 by a gear pressing plate 27 described later. I have.

A lock claw 22a is provided at the left end of the lock lever 22, and a drive shaft 22 is provided near the lock claw 22a.
b, a driving unit 22d is formed at the tip of an arm 22c extending downward along the film cartridge loading chamber 1a, and an SP shaft 22e is formed near the center of rotation. When the lock lever 22 rotates clockwise, the lock claw 22a enters the notch 21b of the drive ring 21 and locks the rotation of the drive ring 21. Interlocking shaft 22
b is a tapered surface 25 of a first release lever 25 described later.
c. The driving section 22d is in contact with a pressing section 26a of a second release lever 26 described later. SP axis 2
A lock lever spring 23 is hung on 2e.

The lock lever spring 23 urges the lock claw 22a of the lock lever 22 into the notch 21b of the drive ring 21 to urge the lock ring 22 to lock the drive ring 21. This lock lever spring 23
Is connected to a cartridge loading chamber 1a in the camera body 1.
And the other end is hung on the SP shaft 22e of the lock lever 22, respectively.

Reference numeral 24 denotes a discharge lever, which moves up and down in conjunction with the film cartridge 50 to discharge a fixed amount of the film cartridge 50 from the loading port of the film cartridge loading chamber 1a, and to release a first release lever 25 described later. Rotate. The discharge lever 24 is disposed above a first release lever 25 described later.

The discharge lever 24 has a discharge shaft 24 a formed in the discharge lever 24 and a hole 25 a formed in the first release lever 25 for contacting the film cartridge 50.
And a hole 24 formed on the upper surface of the film cartridge loading chamber 1a of the camera body 1 to form a hole 24b formed coaxially with the discharge shaft 24a. It is slidably supported by fitting to the fitting shaft 27b.

A tapered surface 24d is formed at the right end of the arm 24c of the discharge lever 24, and guide walls 24e are formed on both sides of the left end discharge shaft 24a. Tapered surface 24
d is in contact with the tapered surface 25b of the first release lever 25, and when the discharge lever 24 moves downward,
The first release lever 25 is rotated clockwise. The guide wall 24e is provided with a fitting shaft 27 of a gear holding plate 27 described later.
The rotation of the discharge lever 24 is prevented by abutting on a guide shaft 27c formed in the vicinity of b.

The first release lever 25 is a lock lever 2
2 is rotated to unlock the drive ring 21. The first release lever 25 is
And is rotatably fitted and supported on a discharge shaft 24 a of the discharge lever 24. This first release lever 2
5 has a tapered surface 25b at the center and a tapered surface 25c at the right end. The tapered surface 25b is in contact with the tapered surface 24d of the discharge lever 24. In addition, the tapered surface 25c is
2b, the first release lever 25 pivots clockwise to rotate the lock lever 22 counterclockwise.

Reference numeral 26 shown in FIG. 5 denotes a second release lever for rotating the lock lever 22 to release the lock of the drive ring 21. This second release lever 26
Is slidably fitted and supported by a fitting shaft 42 a formed on the upper surface of the lens barrel unit 42, and is held by the camera body 1 and the finder unit 44.

A pressing portion 26a is formed at the front of the second release lever 26, and a driving portion 26b is formed at the rear.
The pressing portion 26a is in contact with the driving portion 22e of the lock lever 22, and moves the second release lever 26 backward in conjunction with the movement of the lens barrel unit 42 in the optical axis direction. When the second release lever 26 moves rearward, the lock lever 22 rotates counterclockwise. Drive unit 26b
Is in contact with a linear guide plate 42c provided in the lens barrel unit 42 and moving in the optical axis direction.

A gear holding plate (holding member) 27 holds and holds the fourth rewind gear 17, the fifth rewind gear 18, and the fork gear 19, which constitute the reduction gear train, with respect to the camera body 1. In addition, the light shielding door opening / closing gear 20 is rotatably fitted and supported. The gear holding plate 27 is configured such that the fixed claws 27d formed at two positions thereof are engaged with two fixed claws 1p formed on the upper surface portion of the film cartridge loading chamber 1a of the camera body 1, so that the camera body 1 Fixed to

A fitting hole 27a and a fitting shaft 27b are formed on the gear holding plate 27 coaxially with the rotation center axis of the light shielding door opening / closing gear 20. The fitting hole 27a rotatably fits and supports the support shaft 20c of the light shielding door opening / closing gear 20, as described above. The fitting shaft 27c supports the discharge lever 24 so as to be slidable.

Reference numeral 28 denotes a light shielding door opening / closing lever, which switches a light shielding door opening / closing SW 33 described later. The light shielding door opening / closing lever 28 is disposed on the upper surface of the gear holding plate 27 and is fixed to the light shielding door opening / closing gear 20 by screws 29. Therefore, when the light shielding door opening / closing gear 20 rotates, the light shielding door opening / closing lever 28 also rotates integrally.

The light blocking door opening / closing lever 28 has a pressing portion 2
8a and hooks 28b are formed. Pressing portion 28a
Turns ON / OFF the light shielding door opening / closing SW 33 described later. A light shielding door opening / closing spring 30 is hung on the hook 28b.

Reference numeral 30 denotes a light-shielding door opening / closing spring, which urges the light-shielding door 50b of the film cartridge 50 in the opening direction and the closing direction. This light shielding door opening / closing spring 30
Is an SP shaft 27e, one of which is formed on the gear holding plate 27.
The other is hooked on the hook 28b of the light shielding door opening / closing lever 28, respectively.

Reference numeral 31 denotes a discharge lever spring, which connects the discharge shaft 24a of the discharge lever 24 to the film cartridge loading chamber 1a.
It is biased in the direction to protrude inward. This discharge spring 31
Are fixed to the gear holding plate 27 by screws 32.

Reference numeral 33 denotes a light-shielding door opening / closing switch, which is turned on and off in conjunction with the pressing portion 28a of the light-shielding door opening / closing lever 28. The light-shielding door opening / closing SW 33 includes two contact pieces 33a, 3
3b and an insulating plate 33c arranged between these two contact pieces 33a, 33b.
It is fixed to.

Next, the cartridge chamber lid opening / closing mechanism will be described. In FIG. 4, reference numeral 34 denotes an opening / closing lever, which opens and closes a cartridge chamber cover (not shown) and rotates the drive ring 21. The opening / closing lever 34 is rotatably fitted to and supported by a lever shaft 1q formed on the side surface of the film cartridge loading chamber 1a in the camera body 1, and is held on the camera body 1 by screws 35.

At the upper end of the opening / closing lever 34, a cut-out portion 34a formed in a U-shape and bent is formed. At the substantially central portion, a cut-out portion 34b and a hook 34c are engaged. Claws 34d are formed respectively.

The notch 34 a is fitted with the drive shaft 21 c of the drive ring 21, and transmits the rotational power of the opening / closing lever 34 to the drive ring 21. The notch 34b is in contact with a drive shaft 40a of the operation knob 40 described later. An opening / closing lever spring 39 described later is hooked on the hook 34c. The locking claw 34d locks the cartridge chamber lid.

Reference numeral 36 denotes an opening / closing lever spring. A pressing portion 36a formed at the tip of the spring is disposed in a cutout portion 34a of the opening / closing lever 34.
Pressing c rotates the drive ring 21.

The opening / closing lever spring 36 is fixed to the opening / closing lever 34 by a pin 37, and rotates integrally with the opening / closing lever 34.

Reference numeral 38 denotes a locking lever, which is an opening / closing lever 34.
Are for holding the state where the cartridge chamber lid is released. The locking lever 38 is fixed to the opening / closing lever 34 and rotates integrally with the opening / closing lever 34. A locking claw 38b is provided at the tip of the arm 38a of the locking lever 38.
And engages with a locking claw 1r formed on the side surface of the film cartridge loading chamber 1a.

Numeral 39 denotes an opening / closing lever spring. The direction in which the locking claw 34d of the opening / closing lever 34 is locked with the cartridge chamber lid and the light shielding door 50a of the film cartridge 50 are set.
In the opening direction. One end of the opening / closing lever spring 39 is hooked on the SP shaft 1s formed on the side surface of the cartridge storage chamber 1a in the camera body 1, and the other end is hooked on the hook 34c of the opening / closing lever 34.

An operation knob 40 has an operation section 40a operated by the photographer. When opening and closing the cartridge chamber lid,
When the photographer operates the operation knob 40, the open / close lever 34
Rotates. The operation knob 40 is rotatably fitted to and supported by a strap shaft 1u having a strap hole 1t formed on a side surface of the cartridge loading chamber 1a of the camera body 1, and is provided with a cover (not shown).
Is held in. A drive shaft (not shown) is formed at a position of the operation knob 40 facing the operation unit 40a, and the drive shaft is connected to the notch 3 of the opening / closing lever 34.
4b. When the drive shaft comes into contact with the end face 34 e of the opening / closing lever 34, the turning power of the operation knob 40 is transmitted to the opening / closing lever 34.

Next, the main unit configuration of the camera will be described. 5 and 7, the lens barrel unit 42 is configured to be able to expand and contract to at least three positions of a photographing position, a first non-photographing position, and a second non-photographing position. Are fixed by four screws 43.

The lens barrel unit 42 opens and closes the barrier device 42b disposed in the lens barrel unit 42 at the first non-photographing position. Further, at the second non-photographing position, the lens barrel unit 42 is further retracted than the first non-photographing position, and the second release lever 26 disposed on the upper surface of the lens barrel unit 42 is moved in the optical axis direction. .

Reference numeral 46 denotes a strobe light emitting unit which is movable with respect to the camera body 1 between a light emitting position (pop-up position) and a storage position. The strobe light emitting unit 46 is arranged on the upper surface of the winding spool chamber 1b of the camera body 1, and is fixed to the camera body 1 by three screws 47.

The finder unit 44 includes a finder optical system 44a, and a light projecting unit 44b and a light receiving unit 44c including distance measuring elements held on both left and right sides of the finder optical system 44a.

The finder unit 44 is provided in the film cartridge loading chamber 1 on the upper surface of the camera body 1.
a and the winding spool chamber 1b, and is fixed to the camera body 1 by three screws 45. Projection unit 4 of viewfinder unit 44 fixed to camera body 1
As shown in FIG. 5, 4b is disposed in front of the sun gear 10, the planetary gear unit 11 and the clutch gear unit 14 of the film feeding mechanism, and the light receiving unit 44c is connected to the fourth rewind gear of the film feeding mechanism. 17, that is, near the front of the fifth rewind gear 18 and the light shielding door opening / closing gear 20,
It is arranged close to the film cartridge loading chamber 1a.

Here, if the fifth rewind gear 18 is disposed in front of the light shielding door opening / closing gear 20 and the fourth rewind gear 17, the light receiving portion 44c of the finder unit 44
Is disposed above the fifth rewind gear 18 in order to avoid the fifth rewind gear 18, or after the distance between the film cartridge loading chamber 1 a and the take-up spool chamber 1 b in the camera body 1 is increased, the fifth The only option is to dispose it adjacent to the return gear 18. As a result, the light receiving portion 44c of the finder unit 44 is separated from the film cartridge loading chamber 1a, and the size of the entire camera is increased.

On the other hand, in the present embodiment, the fifth rewind gear 18 is rotatably fitted and supported on a support shaft 20c formed coaxially with the rotation center axis of the light shielding door opening / closing gear 20.
Since a space is provided in front of the fourth rewind gear 17 (near the front of the fifth rewind gear 18 and the light-shielding door opening / closing gear 20), the light receiving section 44c of the finder unit 44 can be arranged. 44
Can be arranged close to the film cartridge loading chamber 1a. Therefore, the size of the entire camera can be reduced.

Further, the lock lever 22 and the second release lever 26 of the light shielding door opening / closing mechanism can be arranged between the film cartridge loading chamber 1a and the finder unit 44 without increasing the size of the camera.

In this embodiment, the fifth rewind gear 1
Although a case has been described where 8 is disposed between the light shielding door opening / closing gear 20 and the gear holding plate 27, a fifth rewind gear may be disposed between the camera body 1 and the light shielding door opening / closing gear 20.

In this embodiment, the light shielding door opening / closing lever 28 is disposed on the upper surface of the gear holding plate 27,
However, by fixing the light-shielding door opening / closing lever 28 by a fixing method other than the above, the outer diameter of the support shaft of the light-shielding door opening / closing gear 20 is reduced, and The load acting on the feed motor can be reduced.

(Second Embodiment) FIG. 8 shows a second embodiment of the present invention.
In the camera according to the embodiment, a relationship between a light shielding door opening / closing gear forming a light shielding door opening / closing mechanism and a reduction gear train forming a film feeding mechanism is shown. In the present embodiment,
Components common to the first embodiment are denoted by the same reference numerals as those in the first embodiment.

In this embodiment, unlike the first embodiment, a support hole 20d is formed coaxially with the rotation center axis of the light-shielding door opening / closing gear 20 ', and the light-shielding door opening / closing is formed in the gear holding plate 27'. The support shaft 27 is coaxial with the rotation center axis of the gear 20 '.
f is formed.

The light-shielding door opening / closing gear 20 ′ is rotatably fitted with a portion directly above the light-shielding door opening / closing shaft 20 a extending downward into a support hole 11 formed in the upper surface of the film cartridge loading chamber 1 a in the camera body 1. And support holes 20
The lower part of the support shaft 27f of the gear holding plate 27 'is rotatably fitted to d, and is rotatably supported.

The fifth rewind gear 18 'of the reduction gear train constituting the film feeding mechanism is rotatably fitted and supported by the lower portion of the support shaft 27f.

According to this embodiment, the fifth rewind gear 18 'can be rotated by the support shaft 27f of the gear holding plate 27' formed coaxially with the rotation center axis of the light-shielding door opening / closing gear 20 '. The light receiving section 44c of the finder unit 44 is fitted and supported, and in front of the fourth rewind gear 17 (near the front of the fifth rewind gear 18 'and the light shielding door opening / closing gear 20').
The light receiving section 44c of the finder unit 44 has a space for
Can be arranged close to the film cartridge loading chamber 1a. Therefore, the size of the entire camera can be reduced.

Further, the lock lever 22 and the second release lever 26 of the light shielding door opening / closing mechanism can be disposed between the film cartridge loading chamber 1a and the finder unit 44 without increasing the size of the camera.

In each of the above embodiments, the light receiving section 4 of the finder unit 44 is provided in front of the fourth rewind gear 17.
Although the case where 4c is arranged has been described, the light projecting unit of the finder unit 44 may be arranged.

[0077]

As described above, according to the present invention,
Since a gear member constituting a film feeding mechanism capable of loading a film cartridge having a light-shielding door at the film entrance and exit is arranged coaxially with a rotation center of an opening / closing drive member for opening and closing the light-shielding door of the film cartridge, In front of the opening / closing drive member and the gear member, a space for disposing a part of the finder unit (for example, a distance measuring element disposed on at least one side of the finder optical system) can be created, as in the related art. The finder unit can be arranged close to the film cartridge loading chamber without disposing the finder unit above the gear member or widening the space between the film cartridge loading chamber and the take-up spool chamber. Further, a member constituting a light shielding door opening / closing mechanism together with the opening / closing drive member can be arranged in the space. Therefore, the size of the entire camera can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of a film feeding mechanism and a light shielding door opening / closing mechanism in a camera according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a relationship between a light shielding door opening / closing gear constituting the light shielding door opening / closing mechanism and a reduction gear train constituting a film feeding mechanism.

FIG. 3 is a perspective view of a film cartridge loaded in the camera.

FIG. 4 is an exploded perspective view showing a configuration of a cartridge chamber lid opening / closing mechanism in the camera.

FIG. 5 is an exploded perspective view showing a main unit configuration of the camera.

FIG. 6 is a plan view showing a state in which the reduction gear train is incorporated in the main body of the camera.

FIG. 7 is a plan view showing a state in which a finder unit and a strobe light emitting unit are incorporated in the main body of the camera.

FIG. 8 is a cross-sectional view illustrating a relationship between a light shielding door opening / closing gear and a reduction gear train in a camera according to a second embodiment of the present invention.

[Description of Signs] 1 Camera body 1a Film cartridge loading chamber 18 Fifth rewind gear (gear member) 20 Light shielding door opening / closing gear (opening / closing drive member) 20a Light shielding door opening / closing shaft 20c Support shaft 20d Support hole 22 Lock lever 26 Second Release lever 27 Gear holding plate (holding member) 27a Fitting hole 27f Support shaft 44 Viewfinder unit 44b Light emitting unit 44c Light receiving unit

Claims (9)

[Claims] 1. A film feeding mechanism capable of loading a film cartridge having a light blocking door at a film entrance and a film feeding mechanism for feeding and driving a film of a loaded film cartridge, and an opening and closing drive for rotating to open and close the light blocking door. A gear member constituting the film feeding mechanism is arranged coaxially with a rotation center of the opening / closing drive member. 2. The driving device according to claim 1, wherein the opening / closing drive member has a transmission portion to which a driving force is transmitted, and the gear member is disposed at a position axially overlapping the transmission portion of the opening / closing drive member. The camera according to claim 1, characterized in that: 3. The camera according to claim 1, wherein the gear member is rotatably attached to a shaft of the opening / closing drive member. 4. A holding member for holding down the film feeding mechanism with respect to a camera body and holding the film feeding mechanism, wherein the gear member is rotatably attached to a shaft formed on the holding member. The camera according to any one of claims 1 to 3, wherein 5. The camera according to claim 1, wherein an outer diameter of the gear member is smaller than a rotation outer diameter of the transmission unit. 6. A cartridge chamber lid opening / closing mechanism for opening and closing a lid member of a film cartridge loading chamber in the camera body, wherein the opening / closing drive member is driven to rotate in conjunction with the cartridge chamber lid opening / closing mechanism. The camera according to any one of claims 1 to 5, wherein: 7. The camera according to claim 1, wherein the opening / closing drive member and the gear member are arranged above a film cartridge loading chamber in the camera body, and a finder unit is arranged near and above the film cartridge loading chamber. The camera according to claim 1. 8. A distance measuring element is integrally provided on at least one side of the finder optical system in the finder unit, and near the front of the opening / closing drive member and the gear member near the upper part of the film cartridge loading chamber. 8. The camera according to claim 7, wherein the distance measuring element is disposed on the camera. 9. The opening / closing drive member and the gear member are arranged above a film cartridge loading chamber in the camera body, and near the front of the opening / closing drive member and the gear member near the upper portion of the film cartridge loading chamber. 9. The camera according to claim 1, wherein a member constituting an opening / closing mechanism of the light blocking door of the opening / closing drive member is arranged.