JPH11174558A - Film unit with lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid electrical shock caused by electric conduction through infiltrated seawater in the case of inadvertently dropping a film unit with a lens in the sea. SOLUTION: The housing body of this film unit with lens is constituted of a front cover 25 and a back cover 26. An avoidance projection 70 is formed on the cover 26 side at a part where the end face 51d of the aluminum case 51a of a main capacitor 51 approaches on a joint 24 between the covers 25 and 26. An avoidance recessed part 71 is formed on the cover 25 side. The projection 70 is formed as a circular arc having a larger diameter than the outside diameter of the case 51a so that the joint 24 may not approach to the end face 51d of the case 51a. Even when the seawater infiltrated because the film unit is dropped in the sea oozes out to the joint 24 between the covers 25 and 26 by a capillary phenomenon, the case 51a of the capacitor 51 does not contact with the seawater, so that the electic shock caused by the electric conduction through the seawater is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film unit with a lens having a built-in flash device.

[0002]

2. Description of the Related Art A lens-equipped film unit in which an unexposed photographic film is loaded in advance into a unit body having a simple photographing mechanism built therein is manufactured and sold by the present applicant. There are various types of film units with a lens, and some have a built-in strobe device so that they can be used for indoor or nighttime shooting.

[0003]

In a film unit with a lens incorporating such a strobe device, if the film unit is dropped on seawater by mistake, seawater, which is a conductive liquid, enters the film unit. . In this case, if the main capacitor of the strobe device is in a charged state, if it is picked up, the current stored in the main capacitor may leak through seawater, hands, or the like. Therefore, there is a problem in that if a current leaks through a hand, an electric shock is given to a person having the current.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and is intended to prevent an electric shock from being applied to a person who has a conductive liquid such as seawater by mistake even if it penetrates into the film unit. It is an object to provide a film unit with a lens.

[0005]

In order to achieve the above object, a film unit with a lens according to the first aspect of the present invention is provided such that a high-voltage current wiring portion of a strobe device and a gap between an exterior body are provided separately. is there. The exterior body is composed of a front cover and a rear cover, and the high-voltage current wiring portion is a metal case of a main capacitor, and a joint between the front cover and the rear cover is formed so as to avoid an end face of the metal case. Is preferred. Further, the high-voltage current wiring portion may be a conductive metal piece for flowing a current to the strobe discharge tube, and a joint between the front cover and the rear cover may be formed so as to avoid the conductive metal piece. Further, the high-voltage current wiring portion may be a conductive metal piece for applying a trigger voltage to the strobe discharge tube, and a joint between the front cover and the rear cover may be formed so as to avoid the conductive metal piece.

[0006]

As shown in FIG. 2, a film unit 10 includes a photographing lens 13, a winding knob 14, a finder optical system 15, a strobe light emitting unit 16, a strobe charging start operating member 17, a photographing number display window 19, The charging completion display window 20, the shutter button 21 and the like are exposed. The photographing lens 13 of the film unit 10
On the front left side, a grip portion 22 bulging forward is formed. The bottom cover 23 is disposed on the bottom surface of the grip 22. The bottom cover 23 is opened when taking out the cartridge containing the photographed photo film.

As shown in FIG. 3, the exterior of the film unit 10 includes a front cover 25 and a rear cover 26. These covers 25 and 26 are provided with the exposure unit 2
7. The strobe unit 28, the photographic film cartridge 29 and the main body base 30 are covered with a sandwich structure from front and rear along the photographing optical axis 13a.

As shown in FIG. 2, the front cover 25 and the rear cover 26 have joints 24 extending over the top surface, the left and right side surfaces, and the bottom surface of the film unit 10, and are removably attached to each other by nail coupling. .

As shown in FIG. 3, the exposure unit 27
This is a unit component in which the photographic lens 13, shutter mechanism, film unwinding mechanism, film counter mechanism, finder optical system 15, and the like are integrated. The exposure unit 27 is detachably attached to the center of the front surface of the main body base 30 by hook coupling by hook engagement.

On the front surface of the front cover 25, a photographing lens 1 is provided.
3. An exposure hole 3 for exposing the finder objective lens of the finder optical system 15 and the strobe light emitting section 16 and the like.
1, 32 and 33 are provided. On an upper surface of the front cover 25, a shutter button 21 for operating a shutter mechanism is integrally provided.

The photographic film cartridge 29 is an IX2
A cartridge corresponding to a 40-film cartridge is used. Note that a 135-type photo film cartridge may be used. The photo film cartridge 29 includes a photo film 34, a spool 35 around which the photo film 34 is wound, and a cartridge 36 for rotatably storing the spool 35.

An exposure opening 37 is formed in the center of the main body base 30, and a cartridge chamber 38 and a film roll chamber 39 are formed on both sides thereof. A cartridge 36 is stored in the cartridge chamber 38, and a film roll 34 obtained by rolling the photographic film 34 drawn out of the cartridge 36 into a roll is stored in the film roll chamber 39.
a is stored. These chambers 38 and 39 are open at the back and bottom. The back is closed by the rear cover 26, and the bottom is light-tightly closed by bottom covers 23 and 40 attached to the rear cover 26 so as to be openable and closable.

A winding knob 14 is provided above the cartridge chamber 38. The wind-up knob 14 is engaged with a spool 35 and rotates the spool 35 in a film winding direction (the direction of the arrow shown in FIG. 1) to constitute a film winding mechanism that winds the photographed photo film 34 into the cartridge 36. I have.

The rear cover 26 has a viewfinder eyepiece window 4.
1 and a charge completion display window 20 are provided. Also,
At the upper end of the rear cover 26, an opening 42 for exposing a part of the periphery of the winding knob 14 to the outside is formed.

The strobe unit 28 includes a circuit board 50
The main unit 51 includes a main capacitor 51, a power supply battery 52, a synchro switch 53, a strobe light emitting unit 16, and the like. Light is directed toward the subject. The strobe unit 28 is positioned on the film roll chamber 39 side of the main body base 30 by positioning means provided on the main body base 30, and is held by claw coupling with a claw member provided on the main body base 30 by hook engagement.

The main capacitor 51 is composed of an aluminum electrolytic capacitor. This aluminum electrolytic capacitor is sealed in a bottomed cylindrical aluminum case 51a and sealed with rubber packing or the like in order to prevent the electrolytic solution of the impregnated element from deteriorating its characteristics due to evaporation or moisture absorption. . On the peripheral surface of the aluminum case 51a, an insulating vinyl sleeve 51 for indicating polarity or the like is displayed.
b is covered. Even with this vinyl sleeve 51b, the entire surface of the end surface (the end surface opposite to the connection foot) 17a of the aluminum case 51a on which the explosion-proof valve is arranged is not covered, but only the edge near the peripheral surface is covered. Most of the remaining portion has the aluminum case 51a exposed. The exposed portion of the aluminum case 51a is a cathode made of an electrolytic solution.

Due to the demand for compactness, the gap formed by the exterior body composed of the front cover 25 and the rear cover 26 and various components such as the main body base 30, the photographing unit 27, and the strobe unit 28 has been minimized. ing. Therefore, if the film unit is accidentally dropped into seawater or the like, seawater that has entered inside accumulates in a gap or the like between the main condenser and the exterior body. Then, the seawater or the like seeps into the gap between the joints 24 between the front cover 25 and the rear cover 26 due to a capillary phenomenon.

Therefore, as shown in FIG. 4, when the hand 58 touches the exuded seawater 56, 57, the aluminum case (the high-voltage current
5) and the negative side of the battery are seawater 56, 57 and hand 58
Through the main capacitor 51
In some cases, the electric current charged in the film unit may flow into the hand, causing an electric shock to a person holding the film unit with bare hands.

FIG. 4 schematically shows an electric circuit of the strobe unit 28. The charge switch 61 is connected to the booster circuit 60. When the charge switch 61 is turned on, the booster circuit 60 operates using the battery 52 as a power supply, boosts the low voltage of the battery 52 to a high voltage, for example, 300 V, and charges the main capacitor 51 with this high voltage. Further, the trigger capacitor 62 is charged together with the charging of the main capacitor 51. When the main capacitor 51 is charged to the specified charging voltage, the booster circuit 60 stops operating and stops charging. The neon tube 69 lights up when the main capacitor 51 is charged to a specified charging voltage. The light from the neon tube 69 is guided into the finder 14 by a light guide. As a result, it is possible to confirm in the finder 14 that strobe light emission is ready.

The trigger capacitor 62 discharges when the synchro switch 53 is turned on, and passes the discharge current to the primary coil 63a of the trigger coil 63. Trigger coil 63
Has a very large winding ratio between the primary coil 63a and the secondary coil 63b. When a discharge current from the trigger capacitor 62 flows through the primary coil 63a, a trigger voltage of, for example, 4 kV is applied to the secondary coil 63b. Occur. One end of the secondary coil 63b is grounded via the sync switch 53, and the other end is a trigger output terminal 64 for outputting a trigger voltage. Trigger output terminal 6
The trigger voltage from 4 is applied to the strobe discharge tube 66 via the trigger terminal 65 and the reflector of the strobe light emitting unit 16.

For this reason, as shown in FIG.
At the joint 24 between the 5 and the rear cover 26, an avoiding projection 70 is formed at a portion where the end face 51 d of the aluminum case 51 a of the main capacitor 51 approaches to the rear cover 26 side, and is formed at the front cover 25 side. Is formed with an avoidance recess 71 corresponding to this. The avoidance projection 70 is formed by an arc having a diameter larger than the outer diameter of the aluminum case 51a so that the joint 24 does not approach the end face 51d of the aluminum case 51a. In the present embodiment, the main capacitor 51 is eccentrically disposed on the rear cover 26 side, and the rear cover 26 has a larger area covering the end surface 51d of the main capacitor 51 than the front cover 25. An avoidance projection 70 is formed, and an arc-shaped avoidance concave portion 71 is formed on the front cover 25 side.

Even if the intruded seawater seeps into the joint 24 between the front cover 25 and the rear cover 26 due to the capillary phenomenon, the joint 24 is formed by the avoiding projection 70 and the avoiding concave portion 71. 5
Since the aluminum case 51a of the main capacitor 51 is not in contact with the seawater since it is separated from the end face 51d of the main capacitor 1a, an electric shock through the seawater can be avoided.

In the above embodiment, the rear cover 26 is formed to protrude in an arc shape to form the avoidance protrusion 70. Instead, the avoidance protrusion 70 is formed on the front cover 25 side.
The avoiding recess 71 may be formed on the rear cover 26 side. Further, the avoiding protrusion 70 and the avoiding concave portion 71 are formed in an arc shape, but may be formed in an elliptical shape, a polygonal shape, a rectangular shape, or a triangular shape.

In the above embodiment, the end surface 51d of the aluminum case 51a of the main capacitor 51 and the front cover 2
5 and separating the joint 24 with the rear cover 26,
Although electric shock through a conductive liquid such as seawater is avoided, as shown in FIG.
The joint 77 between the front cover 75 and the rear cover 76 may be separated from the conductive metal contact piece 73 so as to avoid the conductive metal contact piece 73 that allows current to flow through the conductive metal contact piece 73. This conductive metal piece 73 is
As shown in FIG. 1, the reflector case 68 is disposed in the axial direction of the strobe discharge tube 66 along the upper end corner.

Also, when the conductive metal contact 80 (see FIG. 1) for applying a trigger voltage to the strobe discharge tube is located at the joint between the front cover and the rear cover, the conductive metal contact 80 is separated from the conductive metal contact 80. As described above, by forming the joint between the front cover and the rear cover, it is possible to similarly avoid an electric shock via seawater or the like.

It should be noted that the measures for avoiding the seam 24 with respect to the high-voltage current wiring portion 55 such as the end face 51d of the main capacitor 51 and the conductive metal contact pieces 73 and 80 may be carried out for one film unit with a lens. Alternatively, these measures may be selectively performed.

[0027]

According to the present invention, since the high-voltage current wiring portion of the strobe device is provided apart from the gap between the outer package, even if the film unit is dropped on seawater or the like by mistake,
Since the high-voltage current wiring portion of the strobe device and the gap between the exterior body are provided separately, the current charged in the main capacitor does not flow to bare hands through a conductive liquid such as seawater, eliminating electrical shock. Can be.

Further, the high voltage current wiring portion is made of an aluminum case of the main capacitor, and the joint between the front cover and the rear cover is formed so as to avoid the end face of the aluminum case. No electrical shock. Similarly, the joint between the front cover and the rear cover should be avoided so as to avoid a conductive metal piece that causes a current to flow through the strobe discharge tube or to avoid a conductive metal piece that applies a trigger voltage to the strobe discharge tube. Is formed, no electric shock is caused by energization by the penetrating conductive liquid.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a film unit with a lens according to the present invention.

FIG. 2 is a perspective view showing an appearance of a film unit with a lens.

FIG. 3 is a perspective view showing a divided film unit with a lens.

FIG. 4 is an electric circuit diagram of the strobe unit showing a state in which a current flows to a hand through invading seawater.

FIG. 5 shows a conductive metal contact for flowing a current through a strobe discharge tube;
It is a principal part sectional view which shows the positional relationship with the joint of a front cover and a rear cover.

[Explanation of symbols]

 Reference Signs List 10 Film unit with lens 24, 77 Seam 25, 75 Front cover 26, 76 Rear cover 27 Exposure unit 28 Strobe unit 30 Main body 51 Main capacitor 51a Aluminum case 51d End face 55 High-voltage current wiring section 56, 57 Seawater 58 Hand 70 Avoidance Projection 71 Avoidance recess 73, 80 Conductive metal contact piece

Claims (4)

[Claims] 1. A film unit with a lens in which a main body base having a photographing mechanism and a strobe device is covered with an exterior body, wherein a high-voltage current wiring portion of the strobe device and a gap between the exterior body are provided apart from each other. Film unit with lens. 2. The exterior body comprises a front cover and a rear cover, and the high-voltage current wiring portion is a metal case of a main capacitor, and the front cover and the rear cover are combined so as to avoid an end face of the metal case. 2. The film unit with a lens according to claim 1, wherein the film is formed with eyes. 3. The external body is composed of a front cover and a rear cover, and the high-voltage current wiring portion is a conductive metal contact for flowing a current to a strobe discharge tube, and the front cover is arranged to avoid the conductive metal contact. 3. The lens-fitted film unit according to claim 1, wherein a joint between the first cover and the rear cover is formed. 4. The exterior body comprises a front cover and a rear cover, and the high-voltage current wiring portion is a conductive metal contact for applying a trigger voltage to a strobe discharge tube, so as to avoid the conductive metal contact. 4. A film unit with a lens according to claim 1, wherein a joint between the front cover and the rear cover is formed.