JP3559348B2 - Viewfinder switching mechanism - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a finder visual field switching mechanism that changes a visual field range of a finder of a camera or a film unit with a lens.
[0002]
[Prior art]
2. Description of the Related Art In recent years, printed photographs having different aspect ratios according to the type and size of a photographed subject have been provided in order to further extend the appeal and enjoyment of printed photographs by cameras and film units with lenses to general users. As such a print photo, in addition to the conventional standard size L size print (89 mm x 127 mm), a panoramic print (89 mm x 252 mm) with twice the horizontal length, and an aspect ratio for high-definition television broadcasting An approximated high-vision print (89 mm × 158 mm) or the like is generally known.
[0003]
As a method of obtaining such printed photographs having different aspect ratios, the exposure range for the photographic film is limited by a light-shielding plate or the like provided in the lens-fitted film unit while taking one photographic film. , An L size print exposure range (24 mm × 36 mm), a panorama print exposure range (13 mm × 36 mm), and a Hi-Vision print exposure range (20 mm × 36 mm). There is known a method for obtaining a print photograph of each mode.
[0004]
At the time of photographing, all the frames are photographed in a single exposure range having a fixed exposure range, and at the same time, print data specifying a print mode is recorded. A method of obtaining a print photograph of each mode by printing only a range corresponding to the exposure range of each shooting mode as described above has been considered.
[0005]
On the other hand, as known from Japanese Patent Application Laid-Open No. Hei 6-301157, there has been proposed a photographic film patrone in which the entire film is wrapped in the patrone without causing the leader portion to protrude from the patrone. In such a photographic film cartridge, the exposure range of the high-definition print (30.2 mm × 16.7 mm) is set as the standard exposure size, and the L-size print exposure range (23.4 mm × 16.7 mm), and a panoramic print exposure range (30.2 mm × 9.5 mm) that limits the vertical direction of the standard exposure size.
[0006]
As described above, a camera or a film unit with a lens having a function of limiting an exposure range or designating a print range usually has various functions by changing a field of view of a viewfinder corresponding to a range of each print mode. In many cases, an accurate print range in a print mode can be grasped by a photographer. As a method of changing the field of view of the viewfinder of a camera or a film unit with a lens, for example, a field-of-view limiting plate in which the field of view of the viewfinder is set to correspond to the maximum print mode and an opening having a size corresponding to another print mode is provided There is known a method in which is inserted into and removed from the finder to switch to a visual field range corresponding to each print mode.
[0007]
[Problems to be solved by the invention]
As described above, when the field of view of the finder is switched by inserting and removing the field limiting plate from the finder, it is necessary to secure a retreat area of the field limiting plate in the unit body. In particular, when switching to a finder visual field corresponding to three or more print modes is required, at least two or more types of openings provided in the visual field limiting plate are required.
[0008]
However, in many cases, a camera or a film unit with a lens has an exposure optical path immediately below a finder, and necessarily has to provide a space for retracting a view restriction plate in a lateral direction of the unit body. As a result, if the viewfinder field is adapted to three or more print modes, it is necessary to attach a horizontally long field limiting plate provided with two or more openings, and the width of a camera or a film unit with a lens increases. Will be. In a film unit with a lens, which is characterized by its small size and light weight, this field-of-view limiting plate is a major obstacle to miniaturization.
[0009]
SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and a finder field switching mechanism capable of switching the field of view of a finder in accordance with three or more print modes and capable of being downsized. The purpose is to provide.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a finder field switching mechanism of the present invention comprises a first light-shielding portion and a second light-shielding portion extending in two directions from a bent portion and forming an angle larger than 90 degrees with each other. Two symmetrically arranged light shielding plates pivotally supported at a bent portion rotatably between a position and a second position, and an operation member for operating the two light shielding plates in conjunction with each other When the two light-shielding plates are at the first position, each first light-shielding portion covers the upper and lower parts of the finder by a certain width to regulate the view in the vertical direction of the finder. When in the second position, each of the second light-shielding portions covers the left and right portions of the finder by a fixed width to regulate the lateral view of the finder, thereby switching the view range of the finder. is there.
[0013]
【Example】
Hereinafter, as an example of the present invention, a film unit with a lens equipped with the finder field switching mechanism of the present invention will be described. FIG. 2 is an external perspective view of a film unit with a lens on which the finder field switching mechanism of the present invention is mounted, and FIG. 1 is an explanatory diagram of the finder field switching mechanism of FIG. The lens-equipped film unit 2 can select any one of three types of print modes, i.e., a high-definition mode, a panorama mode, and an L size mode, and record the print data on the photo film as print data. .
[0014]
The lens-fitted film unit 2 is roughly divided into a unit body 3 and an outer box 4 covering the unit body 3. The unit body 3 includes a well-known photographing mechanism (not shown), a photographic film cartridge (not shown), a finder visual field switching mechanism 1 described later, and a print mode recording device 20.
[0015]
A photographing lens 5, a finder 6, and an operation protrusion 15a of an interlocking member 15 for selecting a print mode are exposed on the front surface of the unit body 3, and a photograph number display plate 11 and a release button 12 are exposed on the upper surface. ing. On the back of the unit body 3, a winding knob 13 for winding the photo film is exposed.
[0016]
As shown in FIG. 1, the finder 6 includes an eyepiece 6a and an objective lens 6b, and its view range corresponds to a high-definition mode. On the front surface of the finder 6, there is provided a finder visual field switching mechanism 1 including two light shielding plates 7, 8, a guide frame 14, an interlocking member 15, and a toggle spring 16 for urging the same.
[0017]
The light shielding plates 7 and 8 are arranged symmetrically with each other so as to follow two different sides of the four sides of the finder 6. A regulating frame 3a is provided integrally with the unit main body 3 around the light shielding plates 7 and 8, and the light shielding plates 7 and 8 are housed so as to be movable by a fixed width in the vertical and horizontal directions of the finder 6, respectively. I have. Shafts 7a and 8a are provided integrally with the bent portions of the light shielding plates 7 and 8, respectively.
[0018]
The guide frame 14 is provided with two fixing holes 14a, 14b, and the fixing protrusions 3b, 3c provided outside the regulating frame 3a of the unit body 3 are press-fitted, so that the guide frame 14 Fixed to the front.
[0019]
Sliding grooves 14c and 14d serving as regulating members for regulating the movement of the light shielding plates 7 and 8 only in the vertical and horizontal directions are provided at the upper right corner and the lower left corner of the guide frame 14, respectively. Eight shafts 7a, 8a penetrate slidably.
[0020]
The interlocking member 15 has a ring shape with an open top, and rectangular interlocking grooves 15b and 15c are provided at upper right and lower left on a diagonal line, respectively, and shafts 7a and 8a of the light shielding plates 7 and 8 are Penetrate slidably. On the left side of the interlocking member 15, an operation projection 15a for rotating the interlocking member 15 is provided integrally, and a part thereof is exposed on the front surface of the unit body 3.
[0021]
Further, an engagement protrusion 15d that engages with one end of the toggle spring 16 is provided integrally with a lower portion of the interlocking member 15, and holds the toggle spring 16 together with the protrusion 3d that is provided integrally with the unit body 3.
[0022]
With such a configuration, for example, as shown in FIG. 3B, when the interlocking member 15 is set at the high vision position H, both the light shielding plates 7 and 8 are retracted from the front surface of the objective lens 6b. Since the field of view of the viewfinder 6 is not restricted at all, it is the field of view of the high vision mode which is the original field of view.
[0023]
When the operation protrusion 15a is operated from such a state and the interlocking member 15 is rotated counterclockwise as shown in FIG. 3A and set to the L size position L, the interlocking member 15 penetrates the interlocking grooves 15b and 15c. The shafts 7a and 8a of the light shielding plates 7 and 8 which are in use also try to rotate counterclockwise. However, since the shafts 7a and 8a are restricted by the sliding grooves 14c and 14d of the guide frame 14, the shafts 7a and 8a move laterally along the interlocking grooves 15b and 15c, respectively. As a result, the light shielding plates 7 and 8 cover the left and right sides of the objective lens 6b by a fixed width, respectively, and the field of view of the finder 6 changes to a field corresponding to the L size mode.
[0024]
When the operation protrusion 15a is operated from the state shown in FIG. 3B and the interlocking member 15 is rotated clockwise as shown in FIG. 3C and set at the panorama position P, the interlocking grooves 15b and 15c are formed. The shafts 7a and 8a of the penetrating light shielding plates 7 and 8 also try to rotate clockwise. However, since the shafts 7a and 8a are regulated by the sliding grooves 14c and 14d of the guide frame 14, the shafts 7a and 8a move vertically along the interlocking grooves 15b and 15c, respectively. As a result, the light shielding plates 7 and 8 cover the upper and lower sides of the objective lens 6b by a certain width, and the field of view of the finder 6 changes to a field of view corresponding to the panorama mode.
[0025]
One end of the interlocking member 15 is connected to a switch operating member 21a of a selection switch 21 included in the print mode recording device 20 shown in FIG. The print mode recording device 20 records print data designating a print mode on a photographic film incorporated in the unit main body 3 by selecting a print mode by the interlocking member 15, and includes a selection switch 21 and two light emitting diodes. 22a and 22b, a power supply 23, a one-shot multivibrator 24, a main switch 25, and the like.
[0026]
The light emitting diodes 22a and 22b emit light for a certain period of time, thereby exposing a rectangular mark to a data recording area 30b set below each photographing frame 30a of the photographic film 30 shown in FIG. The main switch 25 is closed (turned on) in conjunction with the release button 12 of the unit body 3. Further, the one-shot multivibrator 24 outputs a pulse having a constant width when the main switch 25 is turned on.
[0027]
With this configuration, when the operation protrusion 15a is set to the panoramic position P, the selection switch 21 causes both the light emitting diodes 22a and 22b to operate the circuit of the print mode recording device 20 by the switch operation member 21a connected to the interlocking member 15. Connect to When the release button 12 is pressed, the shutter mechanism of the lens-fitted film unit 2 operates, the main switch 25 is closed, and the one-shot multivibrator 24 generates a pulse having a constant width. As a result, the light-emitting diodes 22a and 22b emit light for a certain period of time, and as shown in FIG. 5A, a panoramic print expressed by exposing two rectangular marks to the data recording area 30b of the photographic film 30. The data 32 is recorded.
[0028]
When the operation projection 15a is set to the L size position L, the selection switch 21 connects only the light emitting diode 22a to the circuit. Therefore, when the release button 12 is pressed, the shutter mechanism operates and only the light emitting diode 22a is operated for a predetermined time. It emits light. Then, as shown in FIG. 5B, in the data recording area 30b of the photographic film 30, L size print data 33 expressed by exposing one rectangular mark is recorded.
[0029]
Further, when the operation projection 15a is set to the hi-hi position H, since the selection switch 21 does not connect the light emitting diodes 22a and 22b to the circuit, even if the release button 12 is pressed, as shown in FIG. No rectangular mark is exposed on the data recording area 30b of the film 30. As a result, this photographed frame is designated as a hi-hijon print.
[0030]
The operation of the embodiment having the above configuration will be described. When taking a picture using the film unit with lens 2 equipped with the finder field switching mechanism 1 of the present invention, first, the winding knob 13 is turned to set an unexposed picture frame. Then, the user sets the desired print mode by operating the operation projection 15a according to the configuration of the subject.
[0031]
For example, when selecting the panorama mode from a state in which the operation projection 15a is set to the hi-hision position H and the field of view of the viewfinder 6 corresponds to the original high-definition mode, the photographer moves the operation projection 15a upward to set the panorama position. Set to P. Then, as shown in FIG. 3 (C), the interlocking member 15 rotates clockwise, and the shafts 7a, 8a of the light shielding plates 7, 8 penetrating the interlocking grooves 15b, 15c also rotate clockwise. And
[0032]
However, the sliding grooves 14c and 14d of the guide frame 14 extend only in the vertical and horizontal directions of the finder 6. For this reason, the direction of movement of the shafts 7a and 8a penetrating the sliding grooves 14c and 14d is restricted, and the shafts 7a and 8a move in the vertical direction along the interlocking grooves 15b and 15c, respectively. As a result, the light shielding plates 7 and 8 cover the upper and lower sides of the objective lens 6b by a certain width, and the field of view of the finder 6 changes to a field of view corresponding to the panorama mode.
[0033]
At the same time, the switch operation member 21a is switched by connection with the interlocking member 15, and both the light emitting diodes 22a and 22b are connected to the circuit of the print mode recording device 20. When the photographing range is confirmed by looking into the viewfinder 6 that has changed to the field of view in the panorama mode, when the release button 12 is pressed, the shutter mechanism of the film unit 2 with the lens operates, the main switch 25 is closed, and the one-shot multi The vibrator 24 generates a pulse having a constant width.
[0034]
As a result, the light-emitting diodes 22a and 22b emit light for a certain period of time, and as shown in FIG. 5A, a panoramic print expressed by exposing two rectangular marks to the data recording area 30b of the photographic film 30. The data 32 is recorded.
[0035]
When the L size mode is selected, the photographer moves the operation protrusion 15a downward to set the L size position L. Then, as shown in FIG. 3 (A), the interlocking member 15 rotates counterclockwise, and the shafts 7a, 8a of the light shielding plates 7, 8 penetrating the interlocking grooves 15b, 15c also turn counterclockwise. Try to move.
[0036]
However, as described above, the movement directions of the shafts 7a and 8a are restricted only to the vertical direction and the horizontal direction of the finder 6 by the sliding grooves 14c and 14d, so that the shafts 7a and 8a are respectively linked to the interlocking grooves 15b and 15c. Move sideways along. As a result, the light shielding plates 7 and 8 cover the left and right sides of the objective lens 6b by a fixed width, respectively, and the field of view of the finder 6 changes to a field corresponding to the L size mode.
[0037]
At the same time, the switch operating member 21a is switched by connection with the interlocking member 15, and only the light emitting diode 22a is connected to the circuit of the print mode recording device 20. When the photographing range is confirmed by looking into the viewfinder 6 which has changed to the field of view in the L size mode, when the release button 12 is pressed, the shutter mechanism of the film unit with lens 2 operates, the main switch 25 is closed, and the one-shot operation is performed. The multivibrator 24 generates a pulse having a constant width.
[0038]
As a result, only the light emitting diode 22a emits light for a certain period of time, and as shown in FIG. 5B, an L size image is formed by exposing only one rectangular mark on the data recording area 30b of the photographic film 30. The print data 33 is recorded.
[0039]
Further, when selecting the high vision mode, the photographer sets the operation projection 15a to the high vision position H. In this position, the shafts 7a and 8a move to the bent portions of the sliding grooves 14c and 14d, and the light shielding plates 7 and 8 are retracted from the front surface of the objective lens 6b and do not block the front surface of the finder 6. The field of view changes to the field of view corresponding to the original high vision mode.
[0040]
At the same time, the switch operating member 21a is switched by coupling with the interlocking member 15, and the selection switch 21 does not connect the light emitting diodes 22a and 22b together to the circuit. Therefore, even if the release button 12 is pressed, a rectangular mark is not exposed at all in the data recording area 30b of the photographic film 30, as shown in FIG. As a result, this photographed frame is designated as a hi-hijon print.
[0041]
When the interlocking member 15 is rotated by the operation of the operation protrusion 15a, the toggle spring 16 is provided between the engagement protrusion 15d and the protrusion 3d of the unit body 3, so that the operation protrusion 15a is in the high-vision position H. Since the interlocking member 15 is urged in each direction when it is turned to the panorama position P or the L size position L, the interlocking member 15 is surely turned to the predetermined position, and light operation is performed. A feeling is obtained.
[0042]
In the photo film of the film unit with lens 2 photographed in this way, the photograph frame in which the print data is not exposed below the photograph frame is printed on a photographic paper in a high-definition size, and the panoramic print data 32 or The photographed frames to which the L-size print data 33 is exposed are printed on photographic paper in panorama size and L size, respectively. As a result, a print photograph of the type specified by the photographer is obtained.
[0043]
Next, a description will be given of a second embodiment of the finder visual field switching mechanism according to the present invention. FIG. 6 is an explanatory diagram of a finder visual field switching mechanism in a second embodiment. The finder visual field switching mechanism 41 includes two sheets that can rotate between a first position corresponding to the panoramic mode shown in FIG. 6A and a second position corresponding to the L size mode shown in FIG. , And a Y-shaped operation member 44 for rotating the light shielding plates 42 and 43 in conjunction with each other.
[0044]
The light-shielding plates 42 and 43 are composed of first light-shielding portions 42a and 43a, second light-shielding portions 42b and 43b, and bent portions 42c and 43c, respectively. The shafts 42d and 43d provided in the bent portions 42c and 43c are separated from each other. It is symmetrically mounted on a unit body (not shown). The first light-shielding portions 42a and 43a and the second light-shielding portions 42b and 43b are each formed at an angle of 90 degrees or more. Further, the light shielding plates 42 and 43 are integrally provided with interlocking shafts 42e and 43e, respectively, and are engaged with the interlocking grooves 44a and 44b of the operation member 44, respectively.
[0045]
With such a configuration, as shown in FIG. 6A, when the operation member 44 is set to the panorama which is the first position, the first light shielding portions 42a and 43a of the light shielding plates 42 and 43 are connected to the viewfinder 40. The upper and lower sides are each covered by a certain width. Thus, the field of view of the viewfinder 40 becomes a field of view corresponding to the panorama mode. At this time, since the angle between each of the first light-shielding portions 42a and 43a and each of the second light-shielding portions 42b and 43b is 90 degrees or more, the second light-shielding portions 42b and 43b cover the left and right sides of the finder 40. There is no end.
[0046]
Next, when the operating member 44 is operated to set to the high-definition television which is an intermediate point between the first position and the second position, the interlocking shafts 42e and 43e and the interlocking grooves 44a and 44b engage to form the light shielding plates 42 and 43. Rotate around the shafts 42d and 43d, respectively. Then, as shown in FIG. 6B, most of the first light-shielding portions 42a and 43a and the second light-shielding portions 42b and 43b are retracted from the finder 40, and the field of view of the finder 40 is the high-definition mode which is the standard shooting mode. The field of view corresponds to
[0047]
When the operation member 44 is further operated to set the L size, which is the second position, the light shielding plates 42 and 43 are further rotated. Then, as shown in FIG. 6C, the second light shielding portions 42b and 43b of the light shielding plates 42 and 43 cover the left and right sides of the finder 40 by a certain width. Thus, the field of view of the finder 40 becomes a field of view corresponding to the L size mode.
[0048]
A third embodiment of the finder visual field switching mechanism embodying the present invention will be described. FIG. 7 is an explanatory view of a finder visual field switching mechanism in a third embodiment. On the front surface of the finder 52 of the lens-fitted film unit 51, a finder field switching mechanism 50 including two light shielding plates 53 and 54, an interlocking member 55 and an operation member 56 for operating the same is provided. The finder 52 corresponds to a field of view in a high-definition mode, which is a standard size.
[0049]
The light shielding plates 53 and 54 are arranged symmetrically with each other so as to follow two different sides of the four sides of the finder 6. Shafts 53a and 54a are provided at the bent portion of the light shielding plate 53 and the right end of the light shielding plate 54, respectively. The shafts 53a and 54a slidably penetrate into curved grooves 51a and 51b provided near the finder 6, respectively.
[0050]
Shafts 53b and 54b are provided on the left ends of the light shielding plates 53 and 54, respectively, and are attached to one end and the other end of the interlocking member 55, respectively. The interlocking member 55 is rotatably mounted on the lens-fitted film unit 51 by a shaft 57. Further, the shaft 54b of the light shielding plate 54 slidably penetrates an elongated hole 56b provided in an operation member 56 for rotating the interlocking member 55.
[0051]
The operation member 56 is integrally provided with an operation knob 56a that protrudes forward from an operation groove 58 provided in a front cover of the lens-fitted film unit 51 and operates the operation member 56 from the outer surface of the lens-fitted film unit 51. ing. On the right side of the operation member 56, there is provided a contact piece 61a of a selection switch 61 constituting a print mode recording device (not shown) for recording a print mode in a photographic film. This print mode recording apparatus is the same as in the first embodiment described above.
[0052]
With such a configuration, for example, as shown in FIG. 8B, when the operation member 56 is set at the high-vision position, both the light shielding plates 53 and 54 are retracted from the front surface of the finder 52, and Since the field of view 52 is not limited at all, it is the field of view of the high vision mode, which is the original field of view.
[0053]
Next, when the operation knob 56a is slid to the left and the operation member 56 is moved to the panoramic position as shown in FIG. 8A, the interlocking member 55 rotates clockwise, and The light-shielding plates 53 and 54 attached to the shaft move in the vertical direction so as to approach each other, and cover the upper and lower sides of the finder 52 by a certain width. As a result, the viewfinder 52 changes to a field of view corresponding to the high-vision mode.
[0054]
Also, when the operation knob 56a is slid rightward from the state of FIG. 8B and the operation member 56 is slid to the L size position as shown in FIG. 8C, the interlocking member 55 is now turned counterclockwise. The light shielding plates 53 and 54, which are pivotally mounted on the ends of the interlocking member 55, respectively, move so as to approach each other in the left and right direction, and cover the left and right ends of the finder 52 by a certain width. As a result, the viewfinder 52 changes to a field of view corresponding to the L size mode.
[0055]
In the above-described three embodiments, the field of view of the finder is switched to the field of view corresponding to each of the panorama, L size, and Hi-Vision modes. May be switched.
[0056]
【The invention's effect】
As described above in detail, according to the finder visual field switching mechanism of the present invention, the first light-shielding portion and the second light-shielding portion extending in two directions from the bent portion and having an angle larger than 90 degrees are formed. Two light-shielding plates which are pivotally supported between the first position and the second position at the bent portion and which are arranged symmetrically with each other, and operate the two light-shielding plates in conjunction with each other When the two light-shielding plates are at the first position, each first light-shielding portion covers an upper portion and a lower portion of the finder by a certain width to regulate the vertical view of the finder, and When the light-shielding plate is at the second position, each second light-shielding portion covers the left side and the right side of the finder by a fixed width to regulate the lateral visual field of the finder, thereby switching the visual field range of the finder. The viewfinder's field of view It enables switching in response to the mode, and can provide a finder field switching mechanism which can be downsized.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a finder visual field switching mechanism of the present invention.
FIG. 2 is an external perspective view of a lens-equipped film unit incorporating the finder field switching mechanism of the present invention.
FIG. 3 is an explanatory view showing a state in each mode of a finder visual field switching mechanism in FIG. 1;
FIG. 4 is a circuit diagram of a print mode recording device incorporated in the film unit with a lens of FIG. 2;
5 is an explanatory diagram showing a photographic film photographed by the film unit with a lens shown in FIG. 2;
FIG. 6 is an explanatory view of a finder visual field switching mechanism according to a second embodiment of the present invention.
FIG. 7 is an explanatory view of a finder visual field switching mechanism according to a third embodiment of the present invention.
FIG. 8 is an explanatory diagram showing a state in each mode of the finder visual field switching mechanism in FIG. 7;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Finder field-of-view switching mechanism 2 Film unit with lens 3 Unit main body 6 Finder 7, 8 Light shield 15 Interlocking member

Claims (1)

In a finder visual field switching mechanism for changing a visual field range of a finder, a first light shielding portion and a second light shielding portion extending in two directions from a bent portion and having an angle of more than 90 degrees are formed, and a first position and a second light shielding portion are formed. It comprises two light-shielding plates arranged symmetrically with respect to each other and pivotally supported by the bent portion so as to be rotatable between positions, and an operating member that operates the two light-shielding plates in conjunction with each other, When the two light-shielding plates are at the first position, each first light-shielding portion covers the upper part and the lower part of the finder by a certain width to regulate the vertical view of the finder. When in the second position, each of the second light-shielding portions covers the left and right portions of the finder by a fixed width to regulate the lateral view of the finder, thereby switching the view range of the finder. File Sunda field of view switching mechanism.

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