JP3745891B2 - Film unit with lens - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a film unit with a lens that includes a strobe unit in which strobe parts such as a charge switch are unitized on a strobe board.
[0002]
[Prior art]
The photo film is pre-loaded so that anyone can easily take a photo shoot. After the photo shoot, if you submit it to the developer without any troublesome rewinding, A lens-fitted photo film unit that returns printed photos is manufactured and sold by the applicant.
[0003]
Some of these lens-equipped film units are commercially available with a strobe device so that photographing can be performed even in a dark place. The unit body of the lens-fitted photo film unit has a main body base in which a photographic film is loaded between the rear cover at the time of manufacture and an exposure centered on the front center portion of the main body base and includes a photographing lens and a shutter mechanism as a unit. A strobe unit that is a simple strobe device that is mounted in the vicinity of the exposure unit on the front side of the main unit base and includes a charging switch, a strobe light emitting unit, etc. on the strobe substrate, and the exposure unit and the strobe unit on the main unit base. The front cover covers the front surface of the main body base so as to be sandwiched between the front surface and the front surface.
[0004]
As a charging operation member for turning on and off the charging switch, there is a member that is slidable with respect to the front cover, in addition to a member that is cut out in the form of a tongue piece so as to be displaceable in the thickness direction. As a structure of the slide-type charging operation member, there are a structure in which a guide is provided on the front cover itself and it is slidably incorporated, and a structure in which the slide cover is sandwiched between a strobe board and the front cover.
[0005]
[Problems to be solved by the invention]
The above-described front cover itself is provided with a guide so that the charging operation member is slidably incorporated, and the structure of the front cover becomes complicated, and a separate process for incorporating the charging operation member into the front cover is required before the unit body assembly process. This is disadvantageous in terms of production efficiency and production cost. In such a point, the method in which the charging operation member is sandwiched between the strobe board and the front cover is more advantageous, but there is a drawback that it is difficult to stably position the charging operation member in the assembly process. In addition, it is only necessary that a guide structure for the charging operation member can be formed on the base of the body on the side of the charging switch, but it is difficult to adopt such a structure in order to reduce the thickness of the film unit with a lens.
[0006]
In order to solve the above-described problems, the present invention provides a lens-fitted photo film unit that has a simple structure but can stably guide a charging operation member with respect to a strobe board before mounting a front cover. It is characterized by doing.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the lens-fitted photo film unit of the present invention is pre-installed with a main body base in which a photographic film is loaded between the rear cover and the front cover at the time of manufacture. In a film unit with a lens that includes a strobe unit in which strobe parts are united and a front cover that covers the front side of the main body base so that the strobe unit is sandwiched between the main body base, the lens unit between the strobe substrate and the front cover. A charging operation member for turning on and off the charging switch is slidably provided so that a part of the charging operation member protrudes outside through an opening formed in a front cover, and the charging operation member is interposed between the strobe board and the charging operation member. The guide member which guides slidably is provided.
[0008]
In addition, the guide member has a protrusion that abuts against the flat surface portion of the strobe board at a position that avoids the protrusion of the substrate, such as a rise of solder on the strobe board, and the protrusion of the substrate at a position facing the substrate protrusion. It has a recessed part and a hole which avoid a part.
[0009]
Said guide member and said charging operation member in cooperation, and constitutes a click stop mechanism for each click stop the charging operation member in the off position for turning off and on the position where the charging switch is turned on. The charging switch has a conductive pattern formed on the strobe substrate, and one end portion fixed on the strobe substrate in the vicinity of the conductive pattern, and the middle portion is substantially positioned so that the other end faces the conductive pattern. It is comprised from the electrical contact piece curved in the U-shape.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
In FIG. 2, a lens-fitted photo film unit 1 according to the present invention comprises a unit main body 2 having a photographing mechanism and loaded with a photographic film in advance, and an exterior label 3 covering this in a roll shape. The exterior label 3 is formed with an opening or the like for exposing the light guide 4, the film counter window 5 and the like that can move up and down to display the completion of the strobe charging.
[0011]
On the front of the unit main body 2, an openable / closable lens barrier 6 that is slidable in the left-right direction, a photographing lens 7 that is exposed at the open position thereof, and the lens barrier 6 that is exposed at the open position are exposed. A finder window 8, a strobe light emitting unit 9, and a strobe charging operation knob 10 that can move up and down as a charging operation member are provided, and a winding knob 11 is provided on the back side. In addition, in addition to the light guide 4 and the film counter window 5, a shutter button 12 is provided at the upper part.
[0012]
The light guide 4 protrudes from the upper part of the film unit 2 in conjunction with the upward movement of the strobe charging operation knob 10 and emits light when the strobe charging is completed, and strobe charging is performed for both the photographer and the subject. Inform that is complete.
[0013]
As shown in FIG. 3, the unit main body 2 includes a front cover 13, a main body base 14, an exposure unit 15, a strobe unit 16, a photographic film cartridge 17, and a rear cover 18. The main body base 14 has a cartridge storage chamber 21 in which the cartridge 20 is stored on one end side, and a film roll chamber 23 in which the film roll 22a in which the photographic film 22 is drawn out from the cartridge 20 in a roll shape is stored on the other end side. It is provided integrally. The exposure unit 15 is attached to a position near the cartridge storage chamber 21 at the front center portion of the main body base 14, and the strobe unit 16 is attached between the exposure unit 15 and the film roll chamber 23.
[0014]
The rear cover 18 is provided with pull-top type bottom covers 18a and 18b for closing the bottoms of the cartridge storage chamber 21 and the film roll chamber 23, respectively. After the rear cover 18 is attached, the bottoms of the chambers 21 and 23 are closed with these bottom lids 18a and 18b, whereby the photographic film cartridge 17 is stored in a light-tight manner with the main body base 14. The bottom cover 18a that closes the bottom of the cartridge storage chamber 21 is a cover that is opened when the cartridge 20 storing the photographic film 22 that has been photographed at the developing station is taken out.
[0015]
On the cartridge storage chamber 21, a winding knob 11 is rotatably provided. A part of the winding knob 11 is exposed from the opening 25 of the rear cover 18. When the film winding operation is performed, the unexposed photographic film 22 is pulled out from the film roll chamber 23 and set in the aperture of the main body base 14 provided at the rear of the exposure unit 15, and at the same time, the exposed photographic film 22 is exposed. It is housed inside the cartridge 20.
[0016]
The exposure unit 15 is a unit that includes the photographing lens 7, a shutter mechanism, a film winding stop mechanism, a shutter charge mechanism, a film counter mechanism, and the like.
[0017]
The shutter button 12 is elastically provided by cutting out a part on the upper surface of the front cover 13 and operates the shutter mechanism of the exposure unit 15 by a pressing operation. The shutter mechanism is a type in which the shutter blade swings in front of the shutter opening. When the shutter blades swing, the subject light passes through the photographing window 13a of the front cover 13 and the photographing lens 7 of the exposure unit 15 and enters the photographic film 22 set in the aperture through the shutter opening.
[0018]
In addition to the photographing window 13a, an opening 13b through which the strobe charging operation knob 10 is exposed to move up and down, an opening 13c through which the strobe light emitting unit 9 is exposed, and the like are formed on the front surface of the front cover 13. The lens barrier 6 is assembled so as to be slidable between an open position that exposes the photographing window 13a and a closed position that covers the photographing window 13a.
[0019]
The strobe unit 16 includes a strobe board 31 having a strobe circuit such as a power supply circuit, a strobe charging circuit, and a strobe light emission circuit, a main capacitor 32, a power supply battery 33, a sync switch 34, and the This is a unit part in which a strobe charge switch 35 and the like that are turned on and off by the up and down movement of the strobe charge operation knob 10 are integrally attached.
[0020]
As shown in FIG. 1, the strobe charging operation knob 10 is integrally provided with a flat operation knob base 38. The operation knob base 38 is inclined in the form of openings 38a, 38b, 38c and a slope. A protruding portion 38e having a forked protrusion 38d and a bifurcated protruding portion 39 extending in the horizontal direction at the tip is formed. Between the strobe substrate 31 and the operation knob base 38, the operation knob base 38 is slidably positioned with respect to the strobe substrate 31 in the moving direction of the strobe charging operation knob 10 (vertical direction in the drawing). A member 40 is provided.
[0021]
The guide member 40 has a circuit element leg projecting from the surface of the strobe board 31, a solder bulge 42, a locking claw projecting from the main body base 14, and a position opposed to the board convex portion such as the strobe charging switch 35. Openings 40a to 40f are respectively formed. Further, on the front surface of the guide member 40, projections 40g and 40h engaged with the opening 38a of the operation knob base 38 and a projection 40i engaged with the opening 38c are formed. Further, a plurality of stabilizing projections 40j, 40k, and 40m are formed on the back surface of the guide member 40 so as to avoid the substrate projections and come into contact with the flat portion of the strobe substrate 31.
[0022]
The guide member 40 has a positioning hole 40n and a notch 40p. On the other hand, a pin 41 formed integrally with the base of the sync switch 34 protrudes toward the guide member 40 through the hole 31a of the strobe substrate 31. When the guide member 40 is placed at a predetermined position on the strobe substrate 31, the pin 41 is inserted into the hole 40n, and the pin 44 protruding from the outer wall surface of the film roll chamber 23 is inserted into the notch 40p. .
[0023]
The opening 38a has an elongated shape, and a small protrusion 45 is formed in the middle of one edge. The protrusion 40g engaged with the opening 38a is a short rectangle having a width enough to be loosely fitted into the opening 38a, and has recesses 46 and 47 that engage with the protrusion 45 at upper and lower corners. is doing. That is, the opening 38a and the protruding portion 40g constitute a click helix top mechanism, the charge on position the flash charge operation knob 10 when the protrusion 45 is engaged with the recess 46, also projecting portion 45 is recess 47 each click helix top a flash charge operation knob 10 to charge the off position when engaged with the. The partition portion 38f between the opening 38a and the opening 38b is formed to be thin, and is bent when the projection 45 moves between the recesses 46 and 47.
[0024]
As shown in FIG. 4, the strobe charge switch 35 includes an electrical contact piece 48 having a pair of movable parts 48 a and a pair of conductive patterns 49 formed on the strobe substrate 31. The movable portion 48a of the electrical contact piece 48 is curved so that the base of the movable portion 48a draws a generally U-shaped gentle arc so that a large amount of deflection can be obtained with a small force. As a result, the elastic force of the movable portion 48a does not decrease (sag) even when the movable portion 48a is pressed and in contact with the conductive pattern 49 for a long time.
[0025]
Behind the strobe charging operation knob 10, a flat projection 38 g is formed integrally with the operation knob base 38, and this reaches the movable portion 48 a of the electrical contact piece 48 through the opening 40 f of the guide member 40. At the time of charging off when the protrusion 45 is engaged with the recess 47, the protrusion 38g is opposed to the recessed portion 51 near the base of the movable portion 48a and hardly presses the movable portion 48a. When the strobe charging operation knob 10 is moved upward from the off position toward the on position, the protrusion 38g gradually pushes the movable portion 48a toward the conduction pattern 49, and the protrusion 45 engages the recess 46. When this occurs, the tip of the movable portion 48a contacts the conduction pattern 49 and the strobe charging switch 35 is turned on.
[0026]
As shown in FIG. 1, the protrusion 38d is engaged when the lens portion 6 and the lever portion 6a formed integrally with the lens barrier 6 are moved from the open position to the closed position. When the strobe charging operation knob 10 is in the on position, the lever portion 6a contacts the tapered surface 53 of the ridge portion 38d and pushes down the operation knob base 38 downward. When the lens barrier 6 completely reaches the closed position, the lever portion 6a reaches the flat top of the ridge portion 38d and locks the operation knob base 38 to the off position of the strobe charging switch 35. Reference numeral 13d denotes a guide plate of the lever portion 6a that is integrally formed on the back surface of the front cover 13, and suppresses the upward movement of the lever portion 6a.
[0027]
The bifurcated projection 39 is engaged with the projection 4 a of the light guide 4, and the light guide 4 is also moved up and down in response to the vertical movement of the operation knob base 38. The incident surface 4b provided below the light guide 4 is opposed to the LED 55 provided on the strobe substrate 31 at a position where the light guide 4 is raised.
[0028]
Next, the operation of the above embodiment will be described. To assemble the lens-fitted photo film unit 1, first, the exposure unit 15 is attached to the front surface of the main body base 14, and then the exposure unit 15 and the film roll are positioned so that the main capacitor 32 of the strobe unit 16 is positioned above the film roll chamber 23. Attached between the chamber 23. Next, the guide member 40 is placed on the strobe substrate 31 of the strobe unit 16 so that the protrusion 40g is on the front side and the strobe charging switch 35 is exposed from the opening 40f. As a result, the pins 41 and 44 are inserted into the holes 40n and the notches 40p, and the stabilizing projections 40j, 40k, and 40m abut against the flat portion of the strobe substrate 31, and the guide member 40 is positioned at a stable predetermined position. Is done.
[0029]
Next, with the light guide 4 in a non-projecting state, the projection 45 engages with the recess 47, the projections 40g and 40h engage with the openings 38a and 38b, and the projection 40i engages with the opening 38c. The operation knob base 38 is placed on the guide member 40. As a result, the bifurcated projection 39 is engaged with the projection 4a of the light guide 4, and the operation knob base 38 is positioned in a very stable state. Thereafter, the front cover 13 is attached to the front side of the main body base 14 so that the exposure unit 15 and the strobe unit 16 are sandwiched between the main body base 14 and the exposure unit 15. Further, after the film is loaded on the back side of the main body base 38, the rear cover 18 is mounted. The exterior label 3 is affixed to the unit body 2 assembled in this way, and the lens-fitted film unit 1 is completed.
[0030]
When the lens-fitted photo film unit 1 is not used, the lens barrier 6 is closed as shown in FIG. In this state, the lever portion 6a engages with the top of the protrusion portion 38d to prevent the operation knob base portion 38 from being lifted, so that inadvertent movement of the strobe charging operation knob 10 is prevented.
[0031]
In order to use the lens-fitted photo film unit 1, first, the lens barrier 6 is slid from the closed position to the open position to expose the photographing lens 7. Next, when performing strobe shooting, the strobe charging operation knob 10 is operated and moved upward. At this time, since the lever portion 6a is retracted from the engagement position with the protruding portion 38d together with the lens barrier 6, the strobe charging operation knob 10 can be easily raised. As a result, the light guide 4 protrudes from the upper part of the unit main body 2, and the protruding portion 38g presses the movable portion 48a of the electric contact piece 48 to bring its tip into contact with the conduction pattern 49, and the strobe charge switch 35 is turned on. The Further, the projection 45 is engaged with the recess 46, and the operation knob base 38 is click-stopped.
[0032]
When the strobe circuit starts operating and the main capacitor 32 is charged to the specified charging voltage, the LED 55 is lit. The light emitted from the LED 55 enters the light guide 4 from the light incident surface 4b, passes through the light guide 4, and is simultaneously emitted from the upper part of the light guide 4 toward the front side and the rear side of the lens-fitted photo film unit 1. Therefore, the photographer and the photographed person can confirm the completion of the flash charging at the same time. Thereby, the photographer can move to the next photographing operation, and the photographed person can make preparations for photographing after confirming that the photographing preparation is ready.
[0033]
When the photographer presses the shutter button 12, the shutter mechanism of the exposure unit 15 performs a release operation, and the sync switch 34 is turned on in conjunction with this. When the sync switch 34 is turned on, the electric charge of the main capacitor 32 is discharged, the discharge tube emits light, and strobe light is emitted from the strobe light emitting unit 9 toward the subject. The light reflected from the subject passes through the photographing lens 7 and is exposed to the photographic film 22 set in the aperture to form a photographing frame.
[0034]
When the lens barrier 6 is closed after the photographing is completed, the photographing lens 7 is protected by the lens barrier 6, and the lever portion 6a presses the tapered surface 53 of the ridge portion 38d to push the operation knob base 38 downward, and the strobe The charge switch 35 is turned off. When it is desired to stop only the flash photography, the flash charging operation knob 10 is slid downward without closing the lens barrier 6. As a result, the charging operation to the main capacitor 32 is stopped, and even if the synchro switch 34 is turned on by the strobe circuit, the strobe light emitting unit 9 does not emit light, so that normal shooting without using the strobe can be performed. .
[0035]
Although the embodiment described above is a film unit with a lens provided with a lens barrier, the present invention may be one without a lens barrier. Although the light guide is movable up and down, the light guide may be fixed.
[0036]
【The invention's effect】
As described above, according to the lens-fitted photo film unit of the present invention, the charging operation member for turning on and off the charging switch between the strobe board and the front cover partially protrudes through the opening formed in the front cover. The guide member is slidably guided between the strobe board and the charging operation member so that the charging operation can be performed before the front cover is mounted. The member can be stably guided with respect to the strobe substrate.
[0037]
In addition, the guide member has a protrusion that contacts the flat surface portion of the strobe substrate at a position that avoids the substrate protrusion such as the rise of solder on the strobe substrate, and avoids the substrate protrusion at a position opposite to the substrate protrusion. Since the concave portion and the hole are provided, the guide member can be stably positioned on the strobe substrate.
[0038]
Also, in cooperation the guide member and the charging operation member, so constituting a click stop mechanism for each click stop charging operation member in the ON position and the OFF position of the charging switch, the inadvertent movement of the charging operation member Therefore, it is possible to reliably switch between normal shooting without using a strobe and strobe shooting. In addition, the charge switch has a conductive pattern formed on the strobe substrate and one end fixed on the strobe substrate in the vicinity of the conductive pattern, and the middle portion is substantially U-shaped so that the other end faces the conductive pattern. Since the electric contact piece can be configured with a small space on the strobe board, the electric contact piece can obtain a large amount of bending with a small force, and the other end portion of the electric contact piece is a conductive pattern. The elastic force of the electrical contact piece does not decrease even when the contact state is long.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a relationship between the operation knob base and the guide member and the strobe board according to the present invention.
FIG. 2 is a perspective view showing an appearance of a lens-fitted photo film unit with a lens barrier opened.
FIG. 3 is an exploded perspective view showing a configuration of a unit main body.
FIG. 4 is an explanatory diagram showing a relationship between a protrusion of an operation knob base and a strobe charge switch.
FIG. 5 is a perspective view showing an appearance of a lens-fitted photo film unit with a lens barrier closed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Film unit with a lens 4 Light guide 6 Lens barrier 9 Strobe light emission part 10 Strobe charge operation knob 15 Exposure unit 16 Strobe unit 31 Strobe board 35 Strobe charge switch 38 Operation knob base part 38a-38c, 40a-40f Opening 38d Projection part 38e , 38g, 40g to 40i, 45 Protrusion 40 Guide member 40j, 40k, 40m Stabilization protrusion 40n Hole 40p Notch 41, 44 Pin 46, 47 Recess 48 Electrical contact piece 49 Conduction pattern

Claims (4)

A main body base in which a photographic film is loaded between the rear cover at the time of manufacture in advance, a strobe unit that is attached to the front side and includes a strobe part such as a charge switch on a strobe board, and the strobe unit is connected to the main body base. In a film unit with a lens consisting of a front cover covering the front side of the main body base so as to be sandwiched between them,
A charging operation member for turning on and off the charging switch is slidably provided between the strobe board and the front cover so that a part of the charging operation member projects outside through an opening formed in the front cover. A lens-fitted photo film unit, characterized in that a guide member for slidably guiding the charging operation member is provided between the operation member and the operation member. The guide member has a protrusion that abuts against the flat surface portion of the strobe substrate at a position that avoids the substrate protrusion such as the rise of solder on the strobe substrate, and has a substrate protrusion at a position facing the substrate protrusion. 2. The lens-fitted photo film unit according to claim 1, further comprising a concave portion and a hole to be avoided. Said guide member and said charging operation member in cooperation, characterized in that it constitutes a click stop mechanism for click stop respectively to the OFF position for turning off the ON position to turn on the charging switch the charge operation member The film unit with a lens according to claim 1 or 2. The charging switch has a conductive pattern formed on the strobe substrate, and one end fixed on the strobe substrate in the vicinity of the conductive pattern, and the middle portion is substantially U-shaped so that the other end faces the conductive pattern. The film unit with a lens according to any one of claims 1 to 3, wherein the film unit comprises an electric contact piece curved into a mold.

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