JPH07120823A - Compact camera - Google Patents

Abstract

PURPOSE:To provide a compact camera excellent in a holding property without unnecessarily making the height of a camera high. CONSTITUTION:The compact camera is equipped with a total reflection mirror 17 reflecting light for photographing after passing a photographic lens 16 downward at a right angle and arranged at an angle of nearly 45 deg. with respect to the optical axis of the photographic lens 16, an aperture opening part 4 provided on the bottom surface side of the camera so as to be perpendicular to the optical axis reflected by the total reflection mirror 17 and using the width direction of a film as the long side of an exposure picture, a cartridge chamber 5 arranged in the vicinity of A the rear side of the aperture opening part 4 and housing a cartridge and a sprocket 7 disposed in the front surface side of the camera on a side opposite to the cartridge chamber 5 across the aperture opening part 4 and making a U-turn to change the moving direction of the film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small camera, and more particularly, to a small camera which reflects photographing light by a total reflection mirror arranged at about 45 degrees with respect to the optical axis of a photographing lens.

[0002]

2. Description of the Related Art Various component layouts for a small camera using a 35 mm film cartridge have been proposed in the past, and some of them are not only conventional cartridges but also new types recently proposed. It is also compatible with Patrone.

As a new type of patrone, in Japanese Patent Laid-Open No. 3-294848, the spool shaft around which the film stored in the patrone is wound is rotated by using a member of the camera to transfer the film to the outside of the patrone. What is sent out is disclosed.

Various cameras have been proposed in the past for reflecting the photographing light that has passed through the photographing lens by a total reflection mirror arranged at about 45 degrees with respect to the optical axis of the photographing lens. As an example of such a camera, for example, Japanese Utility Model Publication No. 50-14502 proposes a single-lens reflex camera using a 16 mm film containing a double patrone, which is semi-transmissive reflection at an angle of 45 degrees with the optical axis of the photographing lens. A mirror is fixed, and a concave lens that doubles as a taking lens and a part of the viewfinder lens constitutes the taking lens optical system and the viewfinder lens optical system.

Further, in Japanese Patent Application No. 5-207840,
In the optical path after passing through the taking lens, a total reflection mirror that is tilted and fixed at an angle of 45 degrees with the optical axis is provided, and this allows the rays of the taking lens to be reflected at a right angle and the spool axis of the film cartridge. And the optical axis of the taking lens are arranged in the same direction. A lens driving motor is placed on the taking lens side of the total reflection mirror, and a film feeding driving motor is placed on the opposite side of the taking lens. Further, there is described a camera in which a finder portion is arranged above the film winding chamber, which aims at downsizing of a camera using a film patrone of a system for sending out the leading end portion of the film.

By the way, in a camera using a 135 type film cartridge (JIS K 7519), the screen for general photography is often overwhelmingly arranged in the horizontal position. The width direction of the film is the long side of the screen (for example, 18 mm ×
24 mm, etc.), and a camera that feeds film in the horizontal direction at the normal shooting position, the screen is in the vertical position at the normal shooting position. It is necessary to reposition the camera in the vertical direction, resulting in poor operability during shooting.

In consideration of such a point, a camera for feeding the film in the longitudinal direction at the normal photographing position with the width direction of the film as the long side of the screen is proposed in Japanese Utility Model Publication No. 60-98826. There is.

[0008]

However, in the one disclosed in Japanese Utility Model Publication No. 50-14502, since the semi-transmissive reflecting mirror is used, the viewfinder becomes dark and the open F value of the taking lens becomes dark. turn into.

Further, according to the above-mentioned Japanese Patent Application No. 5-207840, when the camera is normally held, the screen is in the vertical screen position instead of the horizontal screen which is frequently used, and therefore, when shooting. The operability was not good.

Further, in the one disclosed in Japanese Utility Model Laid-Open No. 60-98826, since the cartridge chamber, aperture opening, film winding chamber, etc. are arranged in the height direction of the camera, the height of the camera is increased. Not only did the operability deteriorate, but it also became a design constraint when arranging various switches.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a small-sized camera in which the height of the camera is not unnecessarily increased and the holding property is good.

[0012]

In order to achieve the above object, the small camera according to the present invention arranges the photographing light passing through the photographing lens at about 45 degrees with respect to the optical axis of the photographing lens. In a camera in which the light reflected by the total reflection mirror and passing through the optical axis of the photographing lens out of the total reflection light is incident on the film exposure surface substantially perpendicularly, The cartridge is arranged substantially perpendicular to the optical axis so as to move in the axial direction.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 show an embodiment of the present invention. In this embodiment, the above-mentioned Japanese Patent Laid-Open No. 3-2948.
As disclosed in Japanese Patent Laid-Open No. 48, a film patrone of a type in which a spool shaft around which a film stored in a patrone is wound is rotated by a member of a camera and the film is fed out of the patrone. There is.

As shown in FIG. 1, FIG. 2 and FIG. 3, a photographing lens 16 composed of a plurality of lenses is provided at the upper right of the central portion of the front side of the camera body 1. A right cover 2 covering the camera body 1 with the center thereof
And the left cover 3 are butted.

The taking lens 16 is held by a lens barrel 18, and a helicoid portion 18a is provided at a substantially central portion of the peripheral surface along the optical axis direction, and a spur gear portion 18b is provided on the rear side of the peripheral surface. Has been formed.

The helicoid portion 18a of the lens barrel 18 is the helicoid portion 19 provided on the inner peripheral surface of the helicoid frame 19.
engaged with a. The helicoid frame 19 is fixed to the helicoid frame fixing portion 1b provided in the camera body 1 in a light-tight manner so that light does not enter from the outside.

On the right side of the taking lens 16, an AF light projecting portion 51 for active type autofocus is provided so as to be exposed to the front side of the camera.

Behind the optical axis of the taking lens 16 described above, the camera body 1 is provided with a total reflection mirror 17 which is fixed at an angle of 45 degrees with the optical axis of the taking lens 16 and is fixed. The subject light flux that has passed through the taking lens 16 is reflected downward at a right angle (see FIG. 3).

Below the total reflection mirror 17, the light flux of the subject incident from the taking lens 16 is made parallel to it.
An aperture opening 4 is provided. The aperture opening 4 is provided in the camera body 1 with the left-right direction of the camera as the longitudinal direction of the opening.

Behind the total reflection mirror 17, there is provided a cartridge chamber 5 for accommodating a cartridge 5a (see FIG. 3). The cartridge chamber 5 has a substantially cylindrical shape whose center axis is substantially perpendicular to the optical axis of the total reflection mirror 17, and a fork provided on the left end face of the inner wall to rotate integrally with a fork gear 28. The portion 28a is provided so as to project rightward.

In the cartridge chamber 5, a cartridge loading lid 4 is rotatably supported on the right cover 2 by a pin 41.
0 is provided so that the cartridge 5a is loaded into the cartridge chamber 5 by the drop-in method.

A film winding chamber 8 is provided further behind the cartridge chamber 5, and a spool 9 is rotatably provided substantially at the center thereof. This spool 9
A roller 11 provided at the tip of the film guide lever 10 is disposed so as to contact the peripheral surface of the roller. The film guide lever 10 is constantly urged in the counterclockwise direction in FIG. 3 by a shaft and a spring (not shown) provided in the camera body 1, whereby the roller 11 is attached to the circumferential surface of the spool 9.
Are in close contact.

Below the photographing lens 16, there is provided a sprocket chamber 6 having a substantially cylindrical shape, and the outer wall of the sprocket chamber 6 has a substantially cylindrical shape from the front surface of the camera to a position where it does not block the subject light flux incident on the photographing lens 16. It projects forward. Inside the sprocket chamber 6, a sprocket 7 as a film moving direction changing means is rotatably arranged.
A plurality of teeth 7a are provided on the peripheral surface of the sprocket 7 so as to project.

A pressure plate 12 is disposed behind the sprocket chamber 6 and on the lower surface side of the aperture opening 4 with a space F from the aperture opening 4. The pressure plate 12 is for pressing the film pulled out from the film outlet 5b of the cartridge 5a in the cartridge chamber 5 to the aperture opening 4 while improving the flatness, and as shown in FIG. The space F is defined by the pressure plate guide 1a provided on the main body 1. A film guide portion 12a is provided on the lower surface side of the pressure plate 12, and a plurality of holes 12b are provided at the end portion.

Below the pressure plate 12, the right cover 2
The film guide plate 13 is provided on the inner bottom surface of the film.
Is fixed. In this film guide plate 13, four guide pins 13c are planted at positions facing four corners on the lower end surface side of the pressure plate 12, and the hole 1 of the pressure plate 12 is formed.
It is fitted to 2b. A pressure plate spring 14 is provided around the guide pin 13c so that the pressure plate 12
Is always pressed against the pressure plate guide 1a. In addition, a snap ring 1 is attached to the tip of the guide pin 13c.
5, the retaining ring 15 has the pressure plate 12 and the film guide plate 13 in the assembled state of the parts.
It is for integrally stopping so that it will not be disassembled by the biasing force of 4.

The film guide plate 13 has the first film guide portion 1 in the direction of the cartridge chamber 5 and the film winding chamber 8.
3a and the second film guide portion 13b are extended,
A film (not shown) is guided to the film winding chamber 8.

In the film guide plate 13, between the film guide portion 12a of the pressure plate 12 and the first film guide portion 13a of the film guide plate 13, a film running distance G for passing the film (see FIG. 4). ) Is formed, and the film running interval H (see FIG.
See) is configured.

The spur gear 18b of the lens barrel 18 has a lens driving mechanism 21 which also serves as a speed reducing mechanism, and a lens driving motor 20 having a substantially oval cross section in which a part of the peripheral surfaces of the cylindrical portion facing each other is cut. Is engaged with. The lens drive motor 20 is arranged near the left side portion of the total reflection mirror 17 with the motor axis facing forward, and is driven by a control means that receives a signal from an AF light receiving portion 52 of active type autofocus described later. The helicoid portions 18a and 19a
Is used to move the taking lens 16 to focus.

As shown in FIG. 2, a film feeding motor 22 is arranged on the front lower side of the camera slightly on the left side of the camera with the output shaft facing rearward. The gear 23 is fixed.

An AF light receiving portion 52 is provided on the upper left side of the film feeding motor 22 so as to be exposed to the front surface of the camera. An elongated finder section 50 is provided above and below the AF light receiving section 52 from the front surface of the camera to the rear surface of the camera.

On the left side of the film feeding motor 22, a strobe condenser 47 and a strobe circuit board 4 are provided.
8. Strobe circuits 49 are arranged in parallel in order from the front side to the rear side, and are collectively arranged at one place as shown in FIG.

On the upper part of the strobe condenser 47, a built-in strobe reflector 45 is arranged on the front side of the camera, and a discharge tube 46 is held in the center thereof (see FIG. 6).

A battery chamber 43 for accommodating a battery 44 such as a 3V lithium single cell is provided on the further rear side of the strobe circuit 49. On the rear side of the battery chamber 43, a battery lid 42 is attached to the left cover 3 so as to be openable and closable by a well-known screw or bayonet.

An electronic circuit 53 is provided on almost the entire left upper portion of the camera body 1 (see FIG. 6). Further, a shutter release button 54 is provided in the upper center of the camera body 1.

Next, referring to FIGS. 7 and 8, details of the film drive mechanism will be described. The output of the first bevel gear 23 attached to the output shaft of the film feeding motor 22 is output to the fork portion 28a via the first gear train and to the sprocket 7 and the spool 9 via the second gear train, respectively. It is being transmitted.

First, the first gear train will be described. The first bevel gear 23 meshes with the second bevel gear 24,
This second bevel gear 24 has spur gear portions 24a integrally connected to each other,
Further, the shaft portion 24b extends coaxially.

The shaft portion 24b of the second bevel gear 24 is rotatably fitted in the hole 27a of the planetary lever 27 and is pivotally supported. The planetary lever 27 has a substantially doglegged shape with two arms extending around the hole 27a as a center of rotation. One arm has a hole 27c and the other arm has a hole 27b. ing.

A first planetary gear 25 is rotatably supported in a hole 27c formed in one arm of the planetary lever 27. The first planetary gear 25 has a pinion portion 25a.
And a shaft portion (not shown) is coaxially extended and fitted into the hole 27c by the shaft portion.

A second planetary gear 26 is rotatably supported in a hole 27b formed in the other arm of the planetary lever 27. The second planetary gear 26 has a pinion portion 26a.
And the shaft portion 26b extends coaxially, and the shaft portion 26b fits into the hole 27b.

Depending on the rotation direction of the second bevel gear 24, the fork portion 28a of the patrone chamber 5 is located at a position where it can be selectively meshed with either the first planetary gear 25 or the second planetary gear 26. A fork gear 28, which is integrally rotatable, is arranged in the.

The second bevel gear 24 to the fork gear 28 described above form a first gear train.

Next, the second gear train will be described. A planet arm 30 is rotatably fitted into the shaft portion 24b of the second bevel gear 24 through a hole 30a thereof, and a hole 30b is bored at the end thereof. The third planetary gear 29 is rotatably supported by the shaft portion 29a in the hole 30b.

The rotational driving force of the third planetary gear 29 is
It is adapted to be transmitted to the sprocket gear 34 via the idle gears 31, 32, 33. The sprocket gear 34 is configured to transmit rotational power to the sprocket 7 by a sprocket shaft (not shown).

A first belt gear 35 is meshed with the idle gear 33 by a spur gear portion 35a. The first belt gear 35 sends out the belt 39 by rotating.

A second belt gear 36 is provided on the other end side of the belt 39. This second belt gear 36
Engages with the belt 39 at substantially the center of the peripheral surface, and has a spur gear portion 36a having a slightly small diameter at one end thereof so as to rotate integrally.

The spur gear portion 36a is formed by the idle gear 3
7, the idle gear 37 meshes with a spool gear 38. This spool gear 38
Rotatably integrally supports the spool 9 via a spool shaft (not shown).

The above-described second bevel gear 24 to the sprocket gear 34, and the second bevel gear 24 to the spool gear 38 via the belt 39 form a second gear train.

Next, the operation of such an embodiment will be described. The operation of the film feeding mechanism of this embodiment is almost the same as that of Japanese Patent Application No. 5-20989 filed by the present applicant.

First, the patrone loading lid 40 is opened to load the patrone 5a (see FIG. 3) into the patrone chamber 5, but at this time, the leading edge of the film does not come out of the patrone 5a.

Next, when the cartridge loading lid 40 is closed,
This is detected by turning on a switch (not shown), and the first bevel gear 23 of the output shaft of the film feeding motor 22 is detected.
Rotates in the clockwise direction and transmits the counterclockwise rotation in FIG. 7 (or FIG. 8) to the second bevel gear 24.

Since the planet lever 27 and the planet arm 30 are axially supported by the shaft portion 24b of the second bevel gear 24,
The lever 27 and the arm 30 rotate counterclockwise in FIG. 8, so that the small gear portion 25a of the first planetary gear 25 attached to one arm of the planetary lever 27 meshes with the fork gear 28, and The third planetary gear 29 attached to the arm 30 is the idle gear 31.
Mesh with.

When the fork gear 28 starts to rotate, the leading edge of the film accommodated inside the cartridge 5a is removed from the film outlet 5b (see FIG. 3) of the cartridge 5a by the engagement with the fork 28a. Begins to be sent to.

As shown in FIGS. 3, 4 and 5, the leading end of the film thus fed out has a pressure plate guide 1a and a pressure plate 1 attached thereto.
After passing through the film running interval F formed by 2, the sprocket chamber 6 is engaged, and the tooth portion 7a of the sprocket 7 is engaged by a perforation (not shown) provided on the film.

At this time, the driving force from the third planetary gear 29 is, on the one hand, the idle gears 31, 32, 33.
Is transmitted to the sprocket gear 34 via
The sprocket gear 34 rotates clockwise in FIG. 7 (or FIG. 8), thereby rotating the sprocket 7.

Since the reduction ratio of the sprocket gear 34 is set to be smaller than the reduction ratio of the fork gear 28, the perforation of the film is pulled by the tooth portion 7a of the sprocket 7.

When the film is pulled by the sprocket 7, the rotation of the fork gear 28 becomes faster and becomes unsynchronized, the first planetary gear 25 is blown away, and the fork gear 28 has a relationship with the film feeding motor 22. When the film is cut off, the film is rotated according to the running speed of the film.

The leading end of the film thus sent by the sprocket 7 makes a U-turn and passes through the film running distance G constituted by the film guide portion 12a of the pressure plate 12 and the first film guide portion 13a of the film guide plate 13, Further, it passes through the film running interval H formed by the second film guide portion 13b and is sent to the film winding chamber 8.

The spool 9 in the film winding chamber 8 is
The drive force from the idle gear 33 passes through the first belt gear 35, the belt 39, the second belt gear 36, and the idle gear 37, and then the spool gear 38 is moved to the position shown in FIG.
By rotating in the clockwise direction (or FIG. 8), the film sent out is wound up.

When the film is wound on the spool 9, the film is wound in close contact with the spool 9 by the film guide lever 10, the roller 11 or another friction mechanism (not shown). .

When the photographing of all the frames of the film is completed in this way, the photographing completion of the film is detected by comparing the number of the photographing frames detected by the known detecting means (not shown) with the number information of the DX code of the film cartridge. It

In response to the film end detection signal, the film feeding motor 22 rotates in the counterclockwise direction opposite to the above-described winding. Then, the planetary lever 27 and the planetary arm 30 rotate clockwise in FIG. 7 (or FIG. 8), the second planetary gear 26 and the fork gear 28 engage with each other to start rewinding the film.

At this time, the third planetary gear 29 and the idle gear 31 are disengaged from each other.
The gear train becomes free, and the sprocket gear 34 and the spool gear 38 rotate following the film rewinding traveling speed.

In the above-mentioned embodiment, the above-mentioned Japanese Unexamined Patent Publication No.
Although the cartridge disclosed in Japanese Patent No. 294848 is used, if the cartridge loading lid 40 can be opened and closed up to the vicinity of the sprocket 7 at the film traveling interval F,
It is also possible to use a 135 type film cartridge (JIS K 7519) which is currently generally used.

Although the sprocket 7 is used to run the film in the above description, a rubber roller or the like may be used instead to run the film.

In this embodiment, since the subject light flux is once reflected by the total reflection mirror and then exposed on the film, the film photographed by this camera is exposed with the right and left reversed. The user will be able to purchase DPs at retail stores.
When requesting E, you will need to attach a back-baked sticker prepared by the manufacturer to the patrone and have them respond at the time of printing.

According to such an embodiment, a total reflection mirror which makes an angle of 45 degrees with the optical axis is fixedly installed in the optical path after passing through the photographing lens to reflect the photographing lens light beam at a right angle, and the axis of the film cartridge. In a camera in which the direction of the direction is orthogonal to the taking lens, the width direction of the film is the long side of the screen (in the case of a 35 m film, for example, the screen is 18 mm × 24 mm). , It is easy to hold the camera in the horizontal position, which is overwhelmingly large in the general shooting screen configuration, and the height of the camera can be lowered. Moreover, since the height of the camera does not become higher than necessary, the camera can be downsized.

Further, since the total reflection mirror is used,
Since the back focus of the shooting lens can be secured and the shooting lens does not protrude from the camera body, it is not necessary to retract the shooting lens when carrying it like a small camera in general, and the structure is simple and there are few breakdowns. Can be

[0068]

As described above, according to the present invention, the height of the camera does not become unnecessarily high, and a small-sized camera having a good holding property can be obtained.

[Brief description of drawings]

FIG. 1 is a front view of a camera according to an embodiment of the present invention.

FIG. 2 is a plan sectional view of the camera of the above embodiment.

FIG. 3 is a sectional view taken along the line A-A ′ of the camera shown in FIG.

4 is a cross-sectional view showing a part of the camera shown in FIG. 2 taken along the line BB ′.

5 is a cross-sectional view showing a second film guide portion when the camera shown in FIG. 3 is cut along the line CC ′.

6 is a cross-sectional view of the camera shown in FIG. 2 taken along line D-D '.

7 is a cross-sectional view of the camera shown in FIG. 2 taken along the line EE ′, showing a film driving mechanism.

8 is a perspective view showing the film drive mechanism shown in FIG.

[Explanation of symbols]

 4 ... Aperture opening 5 ... Patrone room 6 ... Sprocket room 7 ... Sprocket (Film moving direction changing means) 8 ... Film winding room 9 ... Spool 13 ... Film guide plate 16 ... Shooting lens 17 ... Total reflection mirror

Claims (3)

[Claims] 1. The photographing light that has passed through the photographing lens is reflected by a total reflection mirror arranged at an angle of about 45 degrees with respect to the optical axis of the photographing lens, and the photographing lens optical axis of the total reflected light is reflected. In a camera in which light passing through is made incident on a film exposure surface substantially perpendicularly, a film cartridge is arranged so as to move the film exposure surface in the optical axis direction substantially perpendicularly to the optical axis. A small camera that does. 2. A patrone chamber for accommodating the patrone is arranged near the aperture on the side opposite to the subject with the total reflection mirror interposed therebetween, and a film moving direction changing means for changing the moving direction of the film is arranged on the subject side. The small camera according to claim 1, characterized in that. 3. The small camera according to claim 1, wherein an aperture is provided so that a width direction of the film is a long side of an exposure screen.