JP3340554B2 - Camera data imprinting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera data imprinting apparatus for imprinting photographing data such as photographing date and time on a photographing film.

[0002]

2. Description of the Related Art Conventionally, a plurality of light-emitting elements such as LEDs are arranged to selectively emit light, and a light beam generated by the selective light emission is imaged on a film via an optical system, thereby photographing the date and time of photographing. 2. Description of the Related Art A camera having a data imprinting device for imprinting data on a photographic film is known.

[0003] In this type of camera, there are two sizes of photographing screens (35 mm standard size and 13 mm x 36 mm).
In the case of a camera having a function of selecting any one of the so-called panorama sizes, if the same photographing data can be imprinted on any screen size, the imprinting position of the photographing data on the film depending on the screen size (normally Since it is necessary to make the lower right corner of a printed photo different, conventionally, one optical system is provided for each of different printing positions.

[0004] In such a conventional camera, a plurality of optical systems are provided corresponding to different imprint positions, respectively, so that the number of parts, the assembling process, and the installation space are increased, and the cost is disadvantageous. Met.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a data projection apparatus for a camera, comprising: a data module having a plurality of light-emitting elements; and an imaging optical system for imaging a light beam from the data module on a film. A plurality of imaging optical systems are provided to guide the light flux of the data module to different positions on the film, and the plurality of imaging optical systems allow a plurality of light fluxes from the data module to enter.
The same incident surface and the same plurality of lights incident from this incident surface
The same reflective surface that reflects the bundle and the light reflected by this reflective surface
Single unit having the same exit surface for emitting the same light beams
Is characterized by having a common prism .

[0006]

SUMMARY OF THE INVENTION The present invention relates to a data projection apparatus for a camera, comprising: a data module having a plurality of light emitting elements; and an imaging optical system for imaging a light beam from the data module on a film. The image optics are provided with a plurality of light guides for guiding the light flux of the data module to different positions on the film, and the plurality of image forming optics share a single prism that refracts the optical path. I have.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on illustrated embodiments. FIG. 3 shows a camera 10 to which the data imprinting device according to the present invention is applied. The camera 10 has a screen size switching mechanism that can switch the photographing screen size between a 35 mm standard size and a so-called panorama size of 13 mm × 36 mm, and is formed near the aperture 16 when the standard size is selected. When the hole 23 or the panorama size is selected, the pattern light beam emitted by the data module 38 including a plurality of LEDs (light emitting elements) 37 is projected on the film through the hole 24 and is selected by this. It has a function of imprinting photographing data at different positions on the film according to the photographing screen size.

The camera 10 has a patrone chamber 12 and a spool chamber 13 having a spool 13a therein, on the left and right sides of the camera body 11. A pair of upper and lower aperture frames 14a, 14
b and an aperture 16 for regulating the photographing screen surrounded by a pair of left and right aperture frames 15a and 15b. On one side of a rear wall 17 of the camera body 11, a film pressure plate 18 is provided.
Is provided so as to be openable and closable. Back wall 1
An eyepiece 20 of the finder is provided in the center of the upper part of the camera 7, and a slide operation unit 21 is provided at a position on the left side in the figure alongside the eyepiece 20. The slide operation unit 21 can switch the screen size between the standard size and the panorama size by performing a slide operation in the horizontal direction (the left and right direction in FIG. 3) of the camera 10 with a finger or the like.

A hole 23 and a hole 24 are formed in the aperture frame 15b located on the spool chamber 13 side. These holes 23 and 24 are formed in a line in the vertical direction at predetermined positions warped toward the spool chamber 13 from the upper right end of the aperture 16 in FIG.

As shown in FIG. 1, the side wall of the spool chamber 13 has a spool chamber side wall half 30 near the aperture 16.
And the spool chamber side wall half 31 on the side remote from the aperture 16. These spool chamber side wall halves 30 and 31 are fixed to the camera body 11.

The inner side surface of the aperture 16 is formed by a photographic light path light shielding tube 32 having a rectangular cross section. The photographing light path light-shielding tube 32 includes a front half tube portion 32a provided substantially in parallel with the photographing optical axis O, and a rear half tube portion 32b gradually expanding as the film F on the film pressure plate 18 approaches. The imaging optical path including the optical axis O is surrounded. An anti-reflection surface 33 having an uneven shape is formed on the inner peripheral surface of the rear half cylindrical portion 32b.

A space 35 extending in a direction substantially parallel to the photographing optical axis O and having substantially the same length as the diameter of the spool chamber 13 is formed between the spool chamber side wall half 30 and the photographing light path light shielding tube 32. I have. The front end of this space 35 (the lower end in FIG. 1)
, A substrate 36 is fixed, and the rear end faces the film F on the film pressure plate 18. On a surface of the substrate 36 facing the space 35, a data module 38 composed of seven LEDs 37 arranged in a line in a direction orthogonal to the running direction of the film F is provided.
Has been implemented. The data module 38 irradiates a light beam (pattern light beam) that forms photographing data to be printed on the film F. This data module 3
The pattern luminous flux irradiated by the hole 8 passes through the mirror 40 and the prism 41 provided in the space 35 and passes through the hole 23 or the hole 2.
4 to reach the film F.

The mirror 40 is fixed to the side surface of the rear cylinder portion 32b opposite to the side on which the antireflection surface 33 is formed, and reflects the pattern light beam irradiated by the data module 38 toward the prism 41. The prism 41 is provided at a position adjacent to the mirror 40, and forms an image of the pattern light beam reflected by the mirror 40 on the film F via the holes 23 and 24.

As shown in FIG. 2, the prism 41 integrally has a pair of lens surfaces 42a and 42b arranged in parallel in a longitudinal direction (a direction perpendicular to the running direction of the film F) on an incident surface 42, and an exit surface. The lens 43 has a pair of lens surfaces 43a and 43b which are arranged in the vertical direction. Also prism 4
1 is a prism surface 4 connected to the entrance surface 42 and the exit surface 43
Four. This prism surface 44 is
a, and the pattern light beam incident on 42 b is
a, 43b function as a reflecting surface for total reflection.

The lens surfaces 42a and 43a form a part of the pattern light beam reflected by the mirror 40 on the film F through the hole 23, and the lens surfaces 42b and 43b
A part of the pattern light beam reflected by the mirror 40 is formed on the film F through the hole 24. That is, the prism 41
Has two imaging optical systems for guiding the pattern light beam from the data module 38 to two different positions on the film F. One of these two imaging optical systems is an imaging optical system including a lens surface 42a, a prism surface 44, and a lens surface 43a, and the other is an imaging optical system including a lens surface 42b, a prism surface 44, and a lens surface 43b. An image optical system. Thus, it is possible to form a photographic data image having the same contents from the same pattern light beam on the film F in a portion facing the holes 23 and 24.

The lens surfaces 42b and 43b allow the size of the photographed data image formed on the film F by the pattern light beam to be slightly smaller than the size of the photographed data image formed by the lens surfaces 42a and 43a. It is configured. The reason for this configuration is that in consideration of the balance between the size of the shooting screen on the film F and the size of the shooting data to be printed on the shooting screen, the size of the shooting data to be shot on the panorama-size shooting screen is: This is because it is preferable that the size is smaller than the size of the shooting data to be projected on the standard size shooting screen.

Each LED 37 of the data module 38
The flicker timing is controlled by the control circuit 50 (FIG. 7). The control circuit 50 receives data from a pulser 51 for generating a pulse in accordance with the progress of the film F and data from a photographing data holding circuit 52. The pulsar 51 is a well-known type including a light-shielding disk 54 provided coaxially with a counter roller 53 that rotates in synchronization with the running of the film F and a photocoupler 55, and generates a pulse in synchronization with the running of the film F. Let it. With this configuration, after the photographing of one frame is completed, the control circuit 50 causes each LED 37 to emit light in a predetermined pattern and timing according to the progress of the film F in accordance with the photographing data to be recorded.

The camera 10 has a pair of light-shielding plates 61 and 62 that can advance into the photographing optical path and regulate the photographing screen even when the film F is loaded, thereby reducing the photographing screen size to the standard size and the panorama size. It has a screen size switching mechanism that can be switched. When the slide operation unit 21 is slid to one side in the horizontal direction, the pair of light shielding plates 61 and 62 move in parallel in a direction approaching each other to form a panoramic screen size (two-dot chain line in FIG. 4), and slide to the other side. Then, the pair of light shielding plates 61 and 62 are moved in parallel in a direction in which they are separated from each other, and the standard screen size (solid line in FIG. 4)
To form A slide operation unit 21 and a pair of light shielding plates 61,
62 is connected by a known interlocking mechanism (not shown).

The light-shielding plate 61 integrally has an arm 63 extending toward the light-shielding plate 62 and having an L-shape at an end near the spool chamber 13. The arm 63 has a first light-shielding portion 63 bent toward the aperture 16 at the lower end thereof.
a. As shown in FIGS. 5 and 6, the first light-shielding portion 63a is provided so as to be able to advance between the front surface 15b 'of the aperture frame 15b and the lens surface 43b of the prism 41. That is, when the light shielding plate 61 is at the standard size screen position, the light shielding portion 63a
b (FIG. 5), and when the light shielding plate 61 is at the panoramic size screen position, it is located at a position retracted downward from between the hole 24 and the lens surface 43b (FIG. 6).

Light shielding plate 61 located near the upper part of arm 63
Is a second light-shielding portion 61a, and when the light-shielding plate 61 is at the standard size screen position, the hole 23 and the lens surface 4
3a, it is located at a position retracted upward (FIG. 5),
When the light blocking plate 61 is located at the panorama size screen position,
It is located between the hole 23 and the lens surface 43a (FIG. 6).

Therefore, after the photographing of one frame is completed, the single data module 38 moves vertically from the single data module 38 toward two positions on the film F corresponding to the holes 23 and 24 as the film F advances. Although the same pattern light beam that is bifurcated is projected, the pattern light beam that actually reaches the film F differs depending on the selected photographing screen size, and the film light passes through the holes 23 and 24. Only one of the two similar pattern light beams irradiated toward F.

The camera 10 according to the present embodiment having the above configuration operates as follows. When the photographing of one frame is completed, the photographing data at that time, for example, the F value, the shutter speed, the photographing date and time, and the like are stored in the photographing data holding circuit 52. When the winding of the film F proceeds after the photographing of one frame is completed, the counter roller 53 rotates in synchronization with the running of the film F, and the pulser 51 generates a pulse. The control circuit 50 controls blinking of each LED 37 at a predetermined timing according to the pulse from the pulser 51 and the photographing data taken into the photographing data holding circuit 52, and controls the mirror 40, the prism 41, and the hole 23 ( Alternatively, a pattern light beam for forming photographing data in a matrix is projected toward the film F through the hole 24). The timing of the projection of the pattern light beam by the control circuit 50 is controlled in accordance with the length of the photographic data to be recorded so that the data is properly imprinted on the right side of the photographic screen.

When the standard size is selected as the screen size at the time of imprinting the photographing data, the first light shielding portion 63a is located between the lens surface 43b and the hole 24 as shown in FIGS. Then, since the second light shielding portion 61a is retracted from between the lens surface 43a and the hole 23, the lens surface 43b
Further, the pattern light beam going to the film F via the hole 24 is blocked by the light shielding portion 63a, and the pattern light beam going to the film F via the lens surface 43a and the hole 23 reaches the film F. Therefore, when the standard size is selected as the photographing screen size, only the pattern light flux from the data module 38 that has passed through the lens surface 43a and the hole 23 reaches the film F.
It is recorded at an appropriate position of the film F in the standard size (the lower right corner of the photograph when printed).

When the panoramic size is selected as the screen size, as shown in FIGS. 4 and 6, the light shielding portion 63a is retracted downward from between the lens surface 43b and the hole 24, and the lens surface 43a is retracted. Since the second light blocking portion 61a is located between the lens surface 43a and the hole 2
3, the pattern light flux toward the film F is blocked by the second light shielding portion 61a, and the lens surface 43b and the hole 24 are blocked.
The pattern luminous flux toward the film F through the
Reach Therefore, when the panorama size is selected as the screen size, the lens surface 43b and the hole 24
Since only the pattern luminous flux from the data module 38 that has passed through reaches the film F, the photographing data is recorded at an appropriate position of the film F in the panoramic size (the lower right corner of the photograph when printed).

FIG. 8 shows an example of a recording mode, in which the traveling direction A of the film F and seven LEs orthogonal to the direction A are shown.
By the dot data in the D direction given to D37, “F1
1 "is recorded.

According to the present embodiment to which the present invention is applied, a plurality of different photographing optical systems for guiding the pattern light beam from the data module 38 to different positions on the film F, that is, the lens surfaces 42a, Prism surface 4
4. Imaging optical system including lens surface 43a and lens surface 42
Since the imaging optical system including the lens b, the prism surface 44, and the lens surface 43b shares the single prism 41, the number of parts, the assembly process, and the installation space are not increased.

Further, the lens surface 42a, 42b is provided on the entrance surface 42 of the prism 41, and these lens surfaces 42 are provided on the exit surface 43.
Since the lens surfaces 43a and 43b corresponding to a and 42b are integrally formed, the pattern luminous flux from the data module 38 is formed on the film at a different printing magnification according to the selected photographing screen size. be able to.

The mirror 40 and the prism 41 may be integrally formed. According to this configuration, the number of components can be reduced, and the relative position adjustment between the mirror 40 and the prism 41 becomes unnecessary.

The prism 41 of this embodiment has two imaging optical systems for guiding the pattern light beam from the data module 38 toward the film F. When it is necessary to guide to the above positions, it is possible to adopt a configuration having three or more imaging optical systems.

[0030]

As described above, according to the camera data projection apparatus to which the present invention is applied, since a plurality of imaging optical systems share a single prism, the number of parts, the assembly process, Further, it is possible to provide a data imprinting device for imprinting photographing data at different positions on a film at a low cost without increasing the installation space. further,
The entrance surface, reflection surface, and exit surface of the prism are all
The incident surface, the reflective surface, and the exit surface
Since all light beams passing through the imaging optical system are guided on the film,
When forming multiple entrance planes, reflection planes, and exit planes on a prism
The size of the prism can be reduced as compared with the case. Further, if a plurality of lens surfaces are integrally formed on each of the entrance surface and the exit surface of the prism, the light flux of the data module can be imaged at different positions on the film at different transfer magnifications.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of a data imprinting device of a camera to which the present invention is applied.

FIG. 2 is a schematic explanatory diagram showing an arrangement relationship between a data module, a mirror, and a prism.

FIG. 3 is a perspective view of the camera to which the present invention is applied, as viewed from the rear side.

FIG. 4 is a schematic front view showing the vicinity of a light shielding plate and an aperture.

FIG. 5 is an enlarged sectional view showing a main part of the data imprinting device.

FIG. 6 is a cross-sectional view showing a main part in a state different from FIG.

FIG. 7 is an explanatory diagram showing a block diagram of a data module, a pulsar, and other peripheral control systems.

FIG. 8 is a front view showing an example of photographing data to be imprinted on a film.

[Explanation of symbols]

 13 Spool Chamber 13a Spool 16 Aperture 18 Film Pressure Plate 19 Back Cover 23 24 Hole 30 31 Spool Chamber Half Side Wall 32 Photographing Optical Path Light Blocking Tube 35 Space 36 Substrate 37 LED 38 Data Module 40 Mirror 41 Prism 42 Incident Surface 43 Outgoing Surface 42a 42b 43a 43b lens surface 44 prism surface F film O shooting optical axis

Claims (3)

(57) [Claims] A data module having a plurality of light emitting elements; and an image forming optical system for forming an image of a light beam from the data module on a film. Are provided with a plurality of light guides for guiding the light flux of the data module to different positions on the film, and the plurality of imaging optical systems are provided with the data module.
The same entrance surface on which multiple light beams from the
Reflect the same multiple beams coming from the entrance surface of the same
The reflecting surface and the plurality of light beams reflected by the reflecting surface are emitted.
Have a single shared prism with the same exit surface
Camera data imprinting device, characterized in that that. 2. The data imprinting device for a camera according to claim 1, wherein the prism has a plurality of lens surfaces integrally on each of an entrance surface and an exit surface. 3. The data projection device for a camera according to claim 2, wherein the plurality of lens surfaces form light beams of the data module into different positions on the film at different projection magnifications.