JPH10312014A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost and size of a camera. SOLUTION: An AF finder holding part 28 for keeping range-finding and photometry elements and a finder optical system and a gear supporting part 29 which pivotally supports a gear train 22 for feeding a photographic film are integrally formed so that the number of parts and assembly man-hours are decreased to reduce the cost and size. Further, the boundary of the AF finder holding part 28 and the gear supporting part 29 is fixed on a camera main body 3 by a screw 71, not to transmit the deformation of the gear supporting part 29 caused by the load of the gear train 22 to the AF finder part 28.

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 an improvement in a camera for cost reduction.

[0002]

2. Description of the Related Art In order to achieve cost reduction and miniaturization, a low-priced, highly portable compact camera is designed to reduce the number of parts and assembly costs by unitizing the components into functions and reduce the internal space. Is used effectively. For example, components that require high mounting accuracy, such as a distance measuring / photometric element and a finder lens, are mounted on a block-shaped finder substrate to form a unit, which is mounted on the upper part of the camera body.

In order to further reduce the cost and size of the camera having the above configuration, it is conceivable to integrate components having different functions arranged close to each other to reduce the number of components. For example, as a component disposed close to the above-described finder substrate, there is a gear support plate that supports a gear train used for film feeding.

[0004]

However, the gear support plate is easily deformed by the load from the gear train, and cannot be integrated with a finder substrate on which elements requiring high positional accuracy are mounted. .

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a camera capable of reducing cost and size.

[0006]

In order to solve the above-mentioned problems, a camera according to the first aspect of the present invention is a camera for a finder which is mounted on a camera body by assembling a distance measuring / photometric element, a finder optical system and the like. A substrate and a gear support plate for supporting a film feeding gear train attached to the camera body are integrally formed, and the finder substrate and the gear support plate are formed at a boundary between the finder substrate and the gear support plate. Are fixed to the camera body.

In the camera according to the present invention, the positioning accuracy is improved by positioning the camera body using positioning holes or positioning pins formed in at least one place on each of the finder substrate and the gear support plate. Things.

Further, in the camera according to the third aspect, the finder substrate and the gear support plate are fixed to the camera body at a plurality of positions, respectively, and one of these fixing portions is connected to the finder substrate and the gear support plate. At the boundary between the camera and the finder substrate and the gear support plate, which are also used for fixing to the camera body.

According to a fourth aspect of the present invention, there is provided a camera, comprising: a fixing portion disposed at a boundary between the finder substrate and the gear support plate;
This is to prevent the deformation of the finder substrate by receiving the displacement of the gear support plate.

[0010]

FIG. 2 is a perspective view showing the appearance of a camera embodying the present invention. The camera 2 has an IX240 in which a photo film is stored in a plastic cartridge.
This is a compact camera that uses a type film cartridge. The camera 2 includes a front exterior plate 4 for front and rear sides of a camera body 3 (see FIG. 1) in which a film cartridge is loaded and various photographing mechanisms are assembled.
a and a rear exterior plate 4b.

On the upper surface of the camera 2, there is provided a shutter button 6 which is half-pressed during focusing and deeply pressed during shutter release. On the front of the camera 2, a lens barrel 7, a projection window 8 and a light receiving window 9 for distance measurement, a light receiving window 10 for photometry, an object side finder window 11, a red eye reduction lamp window 12, a strobe light emission, and the like. A part 13 and the like are provided. Although not shown, an eyepiece side finder window, a liquid crystal panel on which various photographing information is displayed, a zoom lever for performing a magnification operation of a lens barrel 7 as a zoom lens, and a film cartridge are loaded and unloaded on the back of the camera 2. A back cover or the like is provided to perform the operation.

FIG. 1 is an exploded perspective view showing the structure of the camera 2. Although not shown in detail, the camera body 3 has a cartridge chamber 15 in which a film cartridge is loaded and a photograph sent out from the film cartridge loaded in the cartridge chamber 15 with a lens barrel 7 attached to the center of the front surface interposed therebetween. A film roll chamber 16 into which the film is wound.

A take-up shaft for taking up a photographic film is rotatably arranged in the film roll chamber 16, and a motor serving as a drive source for feeding the film is provided inside the take-up shaft. Is incorporated. A drive shaft 18 that engages with a spool of the film cartridge and rotates in a film feeding direction and a rewinding direction, and a gear 1 that rotates the drive shaft 18 is provided above the cartridge chamber 15.
A gear train 22, 9, 20, 21 is rotatably mounted. The gear train 22 is connected to a motor via a rotating shaft 23 coaxially mounted on the gear 21 and a gear train (not shown) incorporated at the bottom of the camera body 3.

An upper part of the camera body 3 holds a distance measuring and photometric element and a finder optical system, and a gear train 2 mounted on an upper part of the cartridge chamber 15.
A holding member 25 that supports the camera 2 is mounted, and a control board 26 on which a control circuit for controlling each part of the camera 2 is formed is mounted on the holding member 25. The holding member 25 is roughly divided into an AF / finder holding portion 28 which is a finder substrate to which various elements and a finder optical system are attached, and a gear supporting portion 29 which is a gear supporting plate for supporting the gear train 22. .

In the conventional camera, the AF / finder holding section and the gear supporting section are separately provided and mounted on the upper portion of the camera body. However, in the camera 2 of the present embodiment, the AF / finder holding section 28 and the gear supporting section are provided. By integrally forming the part 29, the number of parts and the number of assembling steps can be reduced, and the cost of the camera 2 can be reduced.
Further, since the mounting space can be reduced as compared with the case where two parts are used as in the related art, the size of the camera 2 can be reduced.

The AF / finder holding section 28 has a block shape, and a light receiving lens 31 for distance measurement is provided on the front surface thereof.
A light-receiving element 32 and a stop member 33 for photometry, and a mounting opening 35 in which a red-eye reduction lamp 34 is mounted.
36 and 37 are formed. A light-tight cylindrical portion 38 is integrally formed behind the mounting opening 35 where the light receiving lens 31 is mounted, and a light receiving element 39 for distance measurement is mounted behind the cylindrical portion 38.

A cylindrical portion 42 for mounting an objective lens unit 41 constituting a finder optical system is formed on the side of the mounting opening 36 of the light receiving element 32.
An opening 43 for the objective lens unit 41 is formed on the front surface of the cylindrical portion 42, and a prism 44 constituting a finder optical system is mounted on the rear end. On the side of the cylindrical portion 42, a cylindrical portion 47 to which a light emitting element 45 for distance measurement and a light emitting lens 46 are attached is formed.

The AF / finder holder 28 is mounted on the upper part of the camera body 3 and receives the light-receiving lens 3 for distance measurement.
1, a light receiving element 32 for photometry, a red-eye reduction lamp 34, an objective lens unit 41, and a projection lens 46 for distance measurement include a light-receiving window 9 for distance measurement, a light-receiving window 10 for photometry, and a lamp window for red-eye reduction. 12, objective-side finder window 11, light-emitting window 8 for distance measurement
Be placed behind.

The gear support 29 has a plate shape.
It is integrally formed so as to protrude from the side of the cylindrical portion 38 of the F / finder holding portion 28 to which the light receiving lens 31 for distance measurement is attached. On an upper surface of the gear support portion 29, a zoom lever 49 used for zooming operation of the lens barrel 7 as a zoom lens is assembled. The zoom lever 49 is attached to a pin 50 erected on the upper surface of the gear support plate 29, and is swingable between a telephoto position and a wide-angle position sandwiching the neutral position. Also, this zoom lever 49
An elastic piece 51 for returning the zoom lever 49 rocked between the telephoto position and the wide-angle position to the neutral position is integrally formed.

On the upper surface of the zoom lever 49, a metal contact piece 53 for a zoom changeover switch is attached.
The metal contact piece 53 comes into contact with the control board 26 mounted on the upper part of the holding member 25, and swings together when the zoom lever 49 is swung to contact the conductive surface of the control board 26, thereby performing zoom switching. Turn the switch on and off.

The control board 26 is attached to the holding member 25 with two screws 55 and 56. Further, two flexible substrates 57 and 58 are sandwiched between a portion where the control substrate 26 and the holding member 25 are attached. One flexible board 57 is for connecting a control board 26 to a barcode reader provided on the film cartridge for reading barcode data. The other flexible substrate 58 is for connecting the control substrate 26 to a magnetic head for magnetically recording various data on the magnetic recording layer of the photographic film.

The flexible boards 57 and 58 and the control board 26 are formed with conductive portions, respectively.
When the control board is attached to the holding member 25 with the flexible boards 57 and 58 sandwiched therebetween, these conductive portions come into contact and are electrically connected. Note that the holding member 26 is provided with a holding member 26 so that the conductive portion of the control board 26 and the conductive portions of the flexible substrates 57 and 58 more reliably come into contact with each other.
Rubber rings 59, 60 for pressing the flexible substrates 57, 58 toward the control substrate 26 are attached.

On the lower surface of the gear support portion 29, pins (not shown) for supporting the gears 19 and 20 of the gear train 22 project downward, and the cartridge chamber 1 is provided with a pin.
The gear train 22 is pivotally supported together with the upper surface of the gear train 6.

The holding member 25 has a positioning hole 62 formed on the side of the cylindrical portion 47 of the AF / finder holding portion 28,
Positioning is performed by inserting pins 64 and 65 formed on the upper surface of the camera body 3 into positioning holes 63 formed in the gear support portion 29. In conventional cameras, AF
-Since the finder holding part and the gear supporting part were separately provided, at least two positioning holes were provided in each, and the pitch of each positioning hole was small. Could not be positioned. However, in the camera 2 of the present embodiment, the AF / finder holding unit 28 and the gear supporting unit 29 are integrally formed, and the pitch of the positioning holes 62 and 63 can be increased. The element can be attached to the camera body 3 with higher accuracy.

Positioning holes 62 and 63 and positioning pin 6
The holding member 25 positioned by the gears 4 and 65 includes a hole 67 formed on the side of the positioning hole 62 and the gear support 2.
9 are screw-fixed to the upper part of the camera body 3 by holes 68, 69, 70 formed in 9 and a fixing portion including a screw 71. In the conventional camera, the gear supporting portion for supporting the gear train is screwed at four positions, and the AF / finder holding portion is screwed at two positions. However, in the camera 2 of the present embodiment, by forming the AF / finder holding unit 28 and the gear supporting unit 29 integrally, the vicinity of the boundary between the AF / finder holding unit 28 and the gear supporting unit 29 is set with one screw. By fixing at 71, the number of screws and the number of assembling steps can be reduced. Thereby, the cost of the camera 2 can be reduced.

The gear support 29 is deformed by the load from the gear train 22. The deformation of the gear support 29 is caused by a screw fixing the boundary between the AF / finder holding unit 28 and the gear support 29. Since the light is not transmitted to the AF / finder holding unit 28 by the
There is no possibility that the elements for distance measurement and photometry and the finder optical system are displaced by the deformation of, and do not interfere with the photographing.

In the above embodiment, a compact camera has been described as an example. However, the present invention can be applied to, for example, a single-lens reflex camera or an instant camera. Further, the positioning hole is provided in the holding member and the positioning pin is provided in the camera body, but these may be provided in reverse.

[0028]

As described above, in the camera of the present invention, the finder substrate and the gear support plate having different functions are integrally formed, and the camera is disposed at the boundary between the finder substrate and the gear support plate. Since the fixing portion is also used for fixing the finder substrate and the gear support plate to the camera body, cost can be reduced by reducing the number of parts and the number of assembly steps, and the size can be further reduced.

Further, at least one positioning hole or positioning pin is provided in each of the finder substrate and the gear support plate, and the positioning hole or the positioning pin is used to position the camera body, so that the mounting position accuracy can be improved. Furthermore, even if the gear support plate is deformed by the load of the gear train, this deformation is received by the fixed portion arranged at the boundary between the finder substrate and the gear support plate, and is not transmitted to the finder substrate. There is no adverse effect on the elements for distance measurement and photometry and the finder optical system.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view partially showing a configuration of a camera.

FIG. 2 is a perspective view showing the appearance of the camera.

[Explanation of symbols]

 2 Camera 3 Camera Body 25 Holding Member 26 Control Board 28 AF / Finder Holder 29 Gear Support

Claims (4)

[Claims] 1. A finder substrate mounted on a camera body by assembling elements for distance measurement and photometry, a finder lens, and the like, and a gear support for supporting a gear train for film feeding mounted on the camera body. A camera, wherein a plate is integrally formed, and a fixing portion for fixing the finder substrate and the gear support plate to a camera body is provided at a boundary between the finder substrate and the gear support plate. 2. The integrated finder substrate and the gear support plate are positioned in the camera body by using positioning holes or positioning pins formed at least at one position each, so that the positioning accuracy is improved. The camera according to claim 1, wherein: 3. The finder substrate and the gear support plate are respectively fixed to the camera body at a plurality of positions, and one of these fixing portions is disposed at a boundary between the finder substrate and the gear support plate. 3. The camera according to claim 1, wherein the camera is used for fixing the finder substrate and the gear support plate to the camera body. 4. The finder substrate according to claim 1, wherein the fixing portion disposed at a boundary between the finder substrate and the gear support plate receives the displacement of the gear support plate to prevent the finder substrate from being deformed. Camera according to any of the above.