JP2001242515A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera which is constituted so that the camera body is miniaturized in a longitudinal direction by improving the structure of a film take-up chamber, a battery chamber and its periphery. SOLUTION: A connection gear train 70 for transmitting the driving force of a motor 43 to a spool driving shaft 32 for driving the spool 25 of a film cartridge 23 is arranged partly projecting into the battery chamber 18 so that it does not interfere with the insertion/ejection of the battery 22, and a photographing optical path chamber 38 as a space for storing a lens barrel 9 and the battery chamber 18 are divided by a light shielding sheet 37, and a reduction gear mechanism is arranged close to the front side or the rear side of the film take-up camber in the thickness direction of the camera body, and also other constitutional parts are arranged behind or in front of the reduction gear mechanism, thereby reducing the size of the camera body in the longitudinal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly, to a camera in which a structure around a film winding chamber and a battery chamber is improved to make the camera compact.

[0002]

2. Description of the Related Art In a camera using an IX240 type film cartridge, the film is fed by driving a spool of the film cartridge. At the same time, the film take-up spool provided in the film take-up chamber of the camera starts rotating, and after the leading end of the fed-out film is wound around the film take-up spool, the film is fed by the rotation of the film take-up spool. Is performed. Rewinding of the film after photographing is performed by driving the spool of the film cartridge in the film winding direction.

As described above, the feeding of the film after loading the film cartridge is performed by both the driving of the spool of the film cartridge and the driving of the film take-up spool of the camera. The driving source is a single feed motor incorporated inside the film take-up spool. For this reason, it is necessary to transmit the driving force of the feed motor to the spool drive shaft that drives the spool of the film cartridge, and a transmission gear mechanism is generally arranged along the film feed path.

[0004]

Problems to be Solved by the Invention
As described in Japanese Patent Application Laid-Open Publication No. H05-258700 and Japanese Patent Application Laid-Open No. 6-258700, there is known a camera provided with a battery chamber for housing a power supply battery of the camera below a lens barrel. In such a camera, when the above-described transmission gear mechanism is arranged on the lens barrel, interference with a strobe device or a distance measuring device for autofocus becomes a problem, and the degree of freedom in design is significantly limited. It becomes difficult to make it compact. In addition, if the camera body is arranged below the lens barrel while avoiding interference with the battery chamber, it is difficult to reduce the vertical size of the camera body.

Further, when a battery chamber is provided below the lens barrel, as described in Japanese Patent Application Laid-Open No. 6-258700, a single focus lens is used as the photographing lens, and the retracted amount when not used is small. Although the space constraints are eased, when using a zoom lens as a photographic lens and the lens barrel is to be completely retracted into the camera body when not in use for compactness when carrying, Is disadvantageous in reducing the vertical size of the camera body, because the storage space for the lens barrel and the battery chamber are arranged vertically in almost the entire area in the thickness direction of the camera body.

In the vicinity of the film take-up chamber, the rotation of the feed motor is reduced, and the driving force is transmitted to the film take-up spool or the spool drive shaft on the film cartridge side in accordance with the rotation direction of the feed motor. A reduction gear mechanism including a clutch device is incorporated. However, the reduction gear mechanism has occupied most of the space above or below the film take-up chamber, which hinders the attempt to make the camera body more compact.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described conventional technology, and has as its object to provide a camera having a unique structure that can reduce the size of a camera body in the vertical direction.

[0008]

In order to achieve the above object, a camera according to the present invention has a transmission for transmitting the driving force of a feeding motor to a spool driving shaft which engages with and drives a spool of a film cartridge. A gear mechanism is provided below the film feeding path, and at least a part of the gear mechanism projects into the battery chamber. The battery chamber is provided below the storage space when the lens barrel holding the taking lens is retracted, and a space between the storage space and the battery chamber is a light-shielding sheet on which a surface on the storage space side is subjected to an antireflection treatment. It is partitioned by. Further, a reduction gear mechanism for reducing and transmitting the driving force from the feed motor to the transmission gear mechanism is disposed at the upper or lower part of the film winding chamber so as to be moved forward or backward with respect to the thickness direction of the camera body, and the speed is reduced. Other components are arranged behind or in front of the gear mechanism. A component that generates magnetic noise is disposed at a position facing the magnetic recording device that records photographing data on the photographic film with the battery chamber interposed therebetween, and a flat plate is formed on a surface of the component facing the magnetic recording device. A magnetic noise shielding member made of a magnetic material molded on is attached.

[0009]

1 and 2 are perspective views showing the appearance of a camera 1 embodying the present invention. Camera 1
It comprises a camera body 2 in which various photographing functional parts are incorporated, and a slide cover 4 which is movably mounted on the camera body 2 from the side. The slide cover 4 is made of a lightweight and high-strength material such as plastic, aluminum, titanium, or the like. The slide cover 4 exposes various photographing function units shown in FIG. The cartridge 21 is stopped at three positions: a cartridge replacement position where the lid 21 is exposed so that the cartridge chamber 20 can be opened, and a non-photographing position (not shown) that covers various photographing function units and prohibits photographing operations.

On the front and upper surfaces of the camera body 2, a lens barrel 9, a strobe light emitting section 5, an object side finder window 8a,
A projection window 6 for distance measurement, a light-receiving window 7 for distance measurement, a lock release knob 12, a shutter button 13, and the like are provided. When the camera body 2 is pulled out from the slide cover 4, the strobe light emitting unit 5 is rotatable between an exposure position where the camera body 2 pops up by a spring bias and a storage position where the strobe light is stored in the camera body 2. 83 (see FIG. 3). The lock release knob 12 is used for the slide cover 4
When the is moved from the photographing position to the cartridge replacement position, the lock of the slide cover 4 at the photographing position is released. The camera body 2 at a position facing the shutter button 13
A push button type shutter switch is provided on the upper surface of the camera for performing distance measurement and photometry by a distance measuring device and a photometric device inside the camera main body 2 when the shutter button is half-pressed, and causes a shutter unit to perform a shutter release when fully pressed.

FIG. 2 is a perspective view showing the appearance of the camera 1 when the slide cover 4 is moved to the cartridge replacement position. On the back side of the camera body 2, a liquid crystal display panel 16 on which various information of the camera 1 is displayed, a panel switch 15 for performing various settings of the camera 1, a CHP switching knob 14 for switching a print aspect ratio, and an eyepiece side finder window 8b. Etc. are provided. Also, slide cover 4
On the back of is provided a substantially circular zoom button 17,
When the slide cover 4 is slid to the shooting position, it faces a zoom switch (not shown) provided on the back of the camera body 2 and covered by the slide cover 4. The zoom switch is operated via a zoom button 17 to change the zoom magnification of the photographing optical system of the lens barrel 9.

At approximately the center of the bottom of the camera body 2, the camera 1
Is provided with a battery chamber 18 for accommodating a battery 22 serving as a power supply for the battery. The battery compartment 18 is opened and closed by a battery compartment cover 19 rotatably attached to the bottom of the camera body 2. A cartridge chamber 20 in which a film cartridge 23 is loaded is provided on the side of the battery chamber 18 on which the slide cover 4 is placed. The cartridge chamber 20 is opened and closed by a cartridge chamber lid 21 rotatably attached to the bottom of the camera body 2. On the opposite side of the cartridge chamber 20 with the lens barrel 9 interposed therebetween, there is provided a film winding chamber (not shown) in which the photographic film 24 drawn from the film cartridge 23 is wound up.

A large notch 4 is formed on the bottom of the slide cover 4.
is formed, and when the cartridge is slid to the cartridge replacement position, the cartridge chamber cover 21 is completely exposed. At positions other than the cartridge replacement position, at least a part of the cartridge chamber cover 21 is covered, and Prevent opening. Further, since the notch 4a exposes the battery chamber cover 19 even when the slide cover 4 is at the non-photographing position, the battery 22 of the camera 1 can be replaced even when the slide cover 4 is at the non-photographing position.

FIG. 3 shows a camera 1 at the optical axis of the taking lens 11.
FIG. Aperture 31 inside camera body 2
Is in front of the photographic optical path chamber 38, and this photographic optical path chamber 38
Is a space for accommodating the lens barrel 9 when the power of the camera 1 is off. A lens barrel drive shaft 34 composed of a ball screw is provided above the photographing optical path chamber 38, and is engaged with a drive shaft engaging portion 36 formed at the end of the lens barrel 9b. The lens barrel 9 b is moved to a predetermined position by turning on and off the power of the camera 1 and operating the zoom button 17 by rotating the lens barrel drive shaft 34. Although not shown, the lens barrel 9b is also provided between the lens barrels 9a and 9b.
An interlocking mechanism for moving the lens barrel 9a according to the amount of movement of the lens barrel 9a is provided, and the lens barrel 9a is moved to a predetermined position.

An opening 18b is formed in a partition wall between the battery chamber 18 and the photographing optical path chamber 38 in order to minimize the storage space for the battery 22 and to reduce the vertical size of the camera body. Penetrates into this opening 18b. An antireflection sheet 37 is attached to the inner wall of the photographing light path chamber 38 in order to prevent external light from entering from the opening 18b and to prevent reflection of subject light in the photographing light path chamber 38. Also, an inner wall 18a of the battery chamber 18 on the front side of the camera 1
A part of the connecting gear train 70 described later
2 are arranged so as to protrude to a position where they do not interfere with insertion / removal of 2.

Behind the aperture 31, there is provided a magnetic recording device including a magnetic head 87, a film pressing pad 88 for bringing the photographic film 24 into contact with the magnetic head 87, and an interface IC (not shown).
With this magnetic recording device, photographic data for each photographic frame is recorded on a magnetic recording layer formed on the photographic film 24. Further, in order to reduce the influence of magnetic noise generated from other components on the magnetic head 87, a booster circuit 90 which is separated from the magnetic head 87 and is located at a position opposed to the battery chamber 18 with the magnetic noise therebetween is arranged. . As a magnetic noise shielding member, a shield plate 89 made of a magnetic material formed on a flat plate is attached to a surface of the booster circuit 90 facing the magnetic head 87.

FIG. 4 is an explanatory view schematically showing a film feeding mechanism of the camera 1, and FIG. 5 is a plan view showing a state where the film feeding mechanism is viewed from the bottom side of the camera 1. The cartridge chamber 20 and the film winding chamber for winding the photographic film 24 are arranged so as to sandwich the photographic optical path chamber 38. A spool drive shaft 32 that engages with the spool 25 of the film cartridge 23 is provided in the cartridge chamber 20.
A cylindrical take-up spool 64 is rotatably incorporated in the film take-up chamber.

A motor 43 for feeding the film is housed inside the take-up spool 64, and is driven by a motor driver 42 controlled by the control unit 40. The rotation shaft 43a of the motor 43 projects below the take-up spool 64, and has a pinion gear 46 and a detection piece 44
And are attached. A photo sensor 45 for detecting the rotation of the detection piece 44 is arranged near the sensor, and a detected signal is input to the control unit 40 to calculate the rotation speed of the motor 43. The rotation of the motor 43 is controlled by the pinion gear 46 and the D1 gear 4.
7, transmitted to the planetary gear unit 50 via the D2 gear 48.

A reduction gear unit 55 composed of a transmission gear 56 for winding, a transmission gear 57 for sending out, a transmission gear 58 for rewinding, and a first interlocking gear 59, a D3 gear 60, a D4 gear 61, a D5 gear 62, and a D6 gear 63. And a take-up spool drive gear, which constitutes a reduction gear mechanism, and a connection gear train 70 in which a plurality of connection gears 71 are aligned and meshed substantially in a row to form a transmission gear mechanism.

The reduction gear mechanism and the transmission gear mechanism are arranged near the planetary gear unit 50, and the rotation of the motor 43 transmitted through the planetary gear unit 50 rotates the take-up spool drive gear. The transmission is transmitted to a take-up spool 64 via a coupling gear train 70 and to a spool drive mechanism to be described later.

The connecting gear train 70 is arranged on the inner wall of the battery chamber 18 on the front side of the camera 1 so that a part thereof protrudes inside the battery chamber 18 to a position where it does not interfere with the insertion and removal of the battery 22. By projecting the connecting gear train 70 into the battery chamber 18, it is not necessary to reduce the diameter of the connecting gear 71 to be used, so that the transmission efficiency does not deteriorate. Also,
Since the connection gear 71 is covered with the base plate 70a and the holding plate 70b that support the connection gear 71, the connection gear 71 does not come into contact with the connection gear 71 when the battery 22 is inserted into or removed from the battery chamber 18.

Although not shown, a clutch mechanism for idling the spool drive shaft 32 when the photographic film 24 is pulled by the take-up spool 64 is incorporated coaxially with each transmission gear of the reduction gear unit 55. I have. Further, the rotation of the rewinding transmission gear 58 is transmitted to the delivery transmission gear 57, but is transmitted to the delivery transmission gear 57.
When the photographic film 24 is rewound, the take-up spool 64 only idles when the photographic film 24 is rewound.

The spool driving mechanism includes a second interlocking gear 72,
D7 gear 73, D8 gear 74, D9 gear 75, transmission shaft 7
6, D10 gear 77, D11 gear 78, D12 gear 7
9, a D13 gear 80. The motor 43 transmitted via the connecting gear 71 of the connecting gear train 70
Is transmitted to the spool drive mechanism via the second interlocking gear 72, and the spool drive shaft 32 is formed integrally with the spool drive shaft D.
The photographic film 24 is fed by rotating the spool 25 of the film cartridge 23 via 13 gears.

In the reduction gear unit 55, since the transmission gears 56 to 59 and the clutch mechanism are coaxially arranged, the area occupied by the planetary gear unit 50 and the reduction gear unit 55 under the film winding chamber is reduced. Can be smaller. As a result, they can be arranged only in the space in front of the approximate center of the camera 1 where the connecting gear train 70 is located, and the AF mechanism light emitting condenser 86 and the strobe step-up transformer are located in the empty space in the rear of the approximate center. 85 and other components can be arranged.

Next, the operation of the above embodiment will be described. When loading the film cartridge 23 into the camera 1, as shown in FIG.
Is rotated to open the cartridge chamber 20, and the film cartridge 23 is inserted. Then, the cartridge chamber lid 21 is closed, and the slide cover 4 is slid to the photographing position or the non-photographing position. When the slide cover 4 is slid from the cartridge exchange position to the photographing position or the non-photographing position, the light shielding cover opening / closing mechanism 35 shown in FIG. Drive shaft 3
3 rotates the light-shielding lid 28 toward the open position, and the film entrance 29 is opened.

When the film entrance 29 is opened, the motor 43 rotates forward, the take-up spool 64 rotates via the planetary gear unit 50 and the reduction gear unit 55, and the first interlocking gear 59, the connecting gear train 70, The spool 25 of the film cartridge 23 is rotated in the film feeding direction via the second interlocking gear 72 and the spool driving mechanism. The photographic film 24 is a film cartridge 2
The film is sent out from the film feeder 3, passes through the film feed path behind the aperture 31, enters the film take-up chamber, and is taken up by the take-up spool 64. When the perforation 24a of the first frame reaches the perforation sensor 41, the motor 43 stops. Thereafter, each time a picture is taken, the film is fed one frame at a time.

When the photographing of all the frames is completed, the motor 43 rotates in reverse, and the spool of the film cartridge 23 is rotated via the planetary gear unit 50, the first interlocking gear 59, the connecting gear train 70, the second interlocking gear 72, and the spool driving mechanism. 25
Is rotated in the film rewind direction. At this time, the rotation of the rewinding transmission gear 58 is not transmitted between the sending-out transmission gear 57 and the winding-up transmission gear 56 by the clutch mechanism, so that the take-up spool 64 only idles. When the photographic film 24 is entirely stored in the film cartridge 23 and the setting process (VEI process) of the use state display of the film cartridge 23 is completed, the motor 43
Stops. Then, the slide cover 4 is slid to the cartridge replacement position, the cartridge chamber 20 is opened, and the film cartridge 23 can be taken out.

The battery 22 stored in the battery chamber 18 can be replaced regardless of whether the slide cover 4 is in the non-photographing position, the photographing position, or the cartridge replacement position.
Although a part of the connection gear train 70 protrudes into the battery chamber 18, the connection gear train 70 is located at a position where it does not interfere with the insertion and removal of the battery 22, so that the insertion and removal of the battery 22 is not affected. Further, since the connection gear 71 of the connection gear train 70 is covered by the base plate 70a and the holding plate 70b of the support member that supports the connection gear train 70, the battery 22 does not come into direct contact when the battery 22 is replaced.

[0029]

As described above, according to the camera of the present invention, the transmission gear mechanism for transmitting the driving force of the feed motor to the spool drive shaft is provided below the film feed path, and at least a part thereof is provided. Protruding into the battery compartment, and also, the photographing optical path chamber, which is a storage space for the lens barrel when not photographing, and the battery compartment provided thereunder are partitioned by a light-shielding sheet, and further, a reduction gear mechanism is provided. The camera body can be further downsized in the vertical direction by arranging the camera body forward or rearward with respect to the thickness direction of the camera body and arranging other components behind or forward of the reduction gear mechanism.

[Brief description of the drawings]

FIG. 1 is a front perspective view of a camera embodying the present invention.

FIG. 2 is a rear perspective view of the camera.

FIG. 3 is a cross-sectional view of the camera.

FIG. 4 is an explanatory view showing a film feeding mechanism.

FIG. 5 is a schematic view showing an arrangement of a film feeding mechanism and other components. .

FIG. 6 is a bottom view of FIG.
It is sectional drawing of A '.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Camera 4 Slide cover 18 Battery room 22 Battery 32 Spool drive shaft 43 Motor 50 Planetary gear unit 55 Reduction gear unit 64 Take-up spool 70 Connection gear train 71 Connection gear

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuhiko Tanaka 1-324 Uetake-cho, Omiya-shi, Saitama, Fuji Photo Optical Co., Ltd. (72) Inventor Yukio Noguchi 1-3324 Uetake-cho, Omiya-shi, Saitama Fuji Photo Within Koki Co., Ltd. (72) Inventor Minoru Ishiguro 1-324 Uetake-cho, Omiya-shi, Saitama Fuji Photo-Optical Co., Ltd. F-term (reference) 2H020 AA02 MC22 MC94 2H100 AA02 DD05 EE03

Claims (5)

[Claims] 1. A feed motor is incorporated in a film take-up spool provided in a film take-up chamber, and the feed motor is provided below a film feed path from a film cartridge loading chamber to a film take-up chamber. In a camera provided with a battery chamber for accommodating a battery serving as a power source, a transmission gear mechanism for transmitting a driving force of the feed motor to a spool drive shaft that engages with a spool of a film cartridge and drives the spool. A camera provided below a film feed path, at least a part of which protrudes into the battery chamber. 2. The battery chamber is provided below a storage space when the lens barrel holding the taking lens is retracted, and a surface between the storage space and the battery chamber is subjected to antireflection processing on a surface on the storage space side. 2. The camera according to claim 1, wherein the camera is divided by a light-shielding sheet. 3. A camera in which a battery chamber is disposed adjacent to a photographing light path chamber provided behind a photographing lens, wherein at least a battery is close to the photographing light path chamber between the photographing light path chamber and the battery chamber. A camera, wherein a partition having an opening is provided in a portion thereof, and the partition is defined by a light-shielding sheet covering the opening. 4. A spool drive shaft which has a feed motor incorporated in a film take-up spool provided in a film take-up chamber, and which is driven by the feed motor to engage with and drive a spool of a film cartridge. In a camera provided with a transmission gear mechanism for transmitting the driving force of the feed motor along a film feed path, a reduction gear mechanism for reducing and transmitting the driving force from the feed motor to the transmission gear mechanism, A camera characterized in that it is arranged forward or rearward in the thickness direction of the camera body at the upper or lower part of the film winding chamber, and other components are arranged behind or forward of the reduction gear mechanism. 5. A photographic film, comprising: a battery chamber for accommodating a battery below a film feed path from a film cartridge loading chamber to a film take-up chamber; and a tip end exposed in the film feed path. A magnetic recording device for recording photographing data for each photographing frame on a magnetic recording layer formed in the camera, wherein a component that generates magnetic noise at a position facing the magnetic recording device with the battery chamber interposed therebetween And a magnetic noise shielding member made of a magnetic material molded into a flat plate is attached to a surface of the component facing the magnetic recording device.