JPH10312008A - Stroboscope charge switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stroboscope charge switching device which is facilitated in a charging operation and capable of preventing a battery from being wasted unwittingly. SOLUTION: A switching plate 41 is provided to freely turn between an ON position where a contact piece 38 is pressed on the side of a charging terminal, to come into contact therewith and an OFF position where the piece 38 is separated from the charging terminal and energized toward the OFF position side (clockwise) by a spring 49. When the switching plate 41 is operated to move to the ON position side, the locking pawl 47 of a restraining plate 42 is engaged with the locking shaft 45 of the switching plate 41 and it is held in the ON position against the energizing force of the spring 49. When a shutter button 17 is depressed, an engagement releasing lever 43 integrally provided with the shutter button 17 presses the restraining plate 42, to move it up to a position where the engagement of the locking pawl 47 and the locking shaft 45 is released. Thus, the switching plate 41 is turned to the OFF position by the energizing force of the spring 49, to make a charging circuit an opened state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flash charging switch device for short-circuiting a pair of charging terminals provided on one of the printed circuit boards on which a flash circuit is formed.

[0002]

2. Description of the Related Art A film unit with a lens in which a photographic film is incorporated in advance in a unit body incorporating a simple photographing mechanism so that a photographer can easily enjoy photographing at any time is commercially available. This film unit with a lens includes, for example, "Photorun Super800"
A product that incorporates only a basic photographing mechanism such as (product name), etc., and has a flash device such as “Sharp Run Flash” (product name), which enables shooting at night or indoors. There are various types, and the user can select one according to the application.

A strobe device mounted on a film unit with a lens is configured by mounting a strobe circuit for controlling charging and discharging on a single printed circuit board. On the printed circuit board, various components that make up the strobe circuit are attached, and a pair of charging terminals that open a part of the charging circuit and a synchro switch that opens a part of the discharging circuit are provided. Is provided. When the charging terminal is short-circuited, the charging circuit operates and the main capacitor is charged. Further, when the synchro switch is turned on, the discharge circuit operates, and strobe light is emitted from the strobe light emitting section.

In a film unit with a lens having a built-in flash device having the above-described structure, the charging terminal of the flash device is short-circuited by operating a charging switch provided on the unit body during flash shooting, and the main capacitor is charged. It has become. As a charge switch,
Conventionally, two types, a push button switch type and a slide switch type, have been used. The push button switch type charging switch has conductivity, and a contact piece provided apart from the charging terminal is elastically moved by a pressing operation to contact the charging terminal, and the contact piece is in contact with the charging terminal during the pressing operation. Only the charging circuit operates. Further, the slide switch type charging switch is configured such that a switch member having a conductive contact piece is moved between an ON position where the contact piece contacts the charging terminal and an OFF position where the contact piece retracts from the front surface of the charging terminal. The charging circuit operates at all times while the switch member is in the ON position.

[0005]

However, in the case of the charge switch of the push button switch type, the photographer must hold the contact piece in a pressed state until the main capacitor is fully charged. When performing flash photography, the charging operation seems very troublesome. The slide switch type charging switch eliminates the hassle of the charging operation.However, when the switch member is in the ON position, the main capacitor is always charged. If you forget to put it back, the batteries will be wasted.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above circumstances, and has as its object to provide a strobe charge switch device which can easily perform a charging operation and can prevent wasteful battery consumption.

[0007]

In order to achieve the above object, a strobe charge switch device according to the present invention comprises an on position in which a contact piece is pressed against a charging terminal side to make contact therewith, and an off position in which the contact piece is separated from the charging terminal. Is provided rotatably between
A switch plate that is spring-biased to the off position side, a locking plate that engages with the switch plate, holds the switch plate in the on position against the urging force of the spring, and is provided integrally with the shutter button; A lock release lever for pressing the lock plate when the shutter button is pressed down and moving the lock plate to a position where the engagement between the switch plate and the lock plate is released, and a charging circuit interlocked with the shutter release Is returned to the open state.

[0008]

FIG. 4 shows the appearance of a film unit with a built-in strobe (hereinafter simply referred to as a film unit with a lens) embodying the present invention. The unit main body 11 is mainly formed of plastic, and an outer label 12 is wound around the center thereof. The unit body 11 has a photographing lens 13, a finder objective window 14, a strobe light emission window 15, and a charge button 2 on the front.
0, and a shutter button 17 and a winding knob 1 on the upper surface.
8 and a counter window 19, and a finder eyepiece window (not shown) on the back. The label 12 is for making the appearance of the lens-fitted film unit 10 beautiful, and its surface is subjected to cosmetic printing. A required portion of the label 12 is provided with an opening for exposing a photographing lens 13, a finder objective window 14, a counter window 19, and a finder eyepiece window provided on the unit main body 11. The photographing operation can be performed while being wound around the unit main body 11.

[0009] As shown in FIG.
It comprises a main body base 21 and a front cover 22 and a rear cover 23 that cover the main body base 21 from front and rear. On both sides of the main body base 21, a patrone chamber 25 for accommodating the patrone main body 24 and a film roll chamber 27 for accommodating the photographic film 26 drawn from the patrone main body 24 in a roll form are provided integrally. An aperture 28 for defining an exposure range to the photographic film 26 is formed therebetween.
The bottoms of the patrone chamber 25 and the film roll chamber 27 are open, and are closed by pull-top type bottom lids 29a and 29b provided on the bottom side of the rear cover 23, respectively. A winding knob 18 is provided on the upper surface of the patrone chamber 25.
The photo film 26 can be wound into the cartridge body 24 by rotating the winding knob 18.

An exposure unit 39 in which a photographing lens 13, a finder optical system, and a shutter mechanism are integrally mounted on a base unit 39a on the front surface of an aperture 28 is provided on the main body base 21. The strobe devices 30 are respectively attached, and are sandwiched between the front cover 22 and the rear cover 23.

The strobe device 30 is configured by mounting a strobe circuit for controlling charging and discharging on a single printed circuit board 31. Components such as a strobe light emitting section 32 for emitting strobe light, a main capacitor 33 for storing electric charge for strobe light, and a battery holder 35 for holding a battery 34 for power supply are attached to the printed circuit board 31. , A part of each of the charging circuit and the discharging circuit is opened, and a pair of charging terminals 36 are connected.
a, 36b and a synchro switch 37 are provided. The pair of charging terminals 36a and 36b are connected to the unit body 1
By operating the charging button 20 provided on the front surface of the device 1, a short circuit is caused by the contact piece 38. In addition, the sync switch 37 includes a pair of upper and lower sync contacts 37 having a flat plate shape.
a, 37b, and these sync contacts 37a, 37b are brought into contact with each other in conjunction with the shutter release.

As shown in FIG. 1, a charging switch device 40 is incorporated on the front surface of the printed circuit board 31. The charging switch device 40 includes a switch plate 41, a locking plate 42, and a locking release lever 43. The switch plate 41 is mounted on a shaft 44 provided on the inner wall of the front cover 22, for example, and is rotatably provided around the shaft 44 as a fulcrum. The switch button 41 is provided integrally with the charge button 20 described above, and an engagement shaft 45 is provided above the charge button 20. The switch plate 41 is incorporated by exposing the charge button 20 from an opening 50 formed in the front cover 22, and its movement range is set to an ON position where the upper end 20 a of the charge button 20 contacts the opening edge of the opening 50 (FIG. (A), and the lower end 20b of the charging button 20 has the opening 5
The position is limited to an off position (see FIG. 8B) in contact with the opening edge of the zero.

One end of the locking plate 42 is connected to the switch plate 4.
1 is formed in the vicinity of the engagement shaft 45 and the other end thereof is formed to be long so as to project below the shutter button 17. The locking plate 42 includes shafts 46a, 46
b, and is slidably provided in the left-right direction in the figure. An engaging claw 47 that engages with the engaging shaft 45 is provided at an end of the locking plate 42 near the engaging shaft 45, and a pressing piece 48 is provided at an end protruding below the shutter button 17. Is provided.

A spring 49 is mounted on the shaft 44, and one end 49 a of the spring 49 is connected to a groove 4 formed in the switch plate 41.
1a, and the other end 49b is hooked on a projection 42a provided on the locking plate 42. As a result, the switch plate 41 is biased toward the off position (clockwise in the drawing), and the locking plate 42 is biased leftward in the drawing. And switch plate 4
When the switch 1 is moved to the ON position, the engaging claw 47 of the locking plate 42 is engaged with the engaging shaft 45 of the switch plate 41, and the switch plate 41 is engaged at the ON position against the urging force of the spring 49. (See FIG. 1A).

The locking release lever 43 is used for the shutter button 17
Are provided integrally on the bottom surface of the. This lock release lever 4
3 presses the pressing piece 48 of the locking plate 42 rightward in the drawing when the shutter button 17 is pressed, and
Locking plate 42 until the position where the engagement between
Is moved (see FIG. 1B).

As shown in FIG. 2, an opening 51 is formed in the switch plate 41 at a position facing the contact piece 38.
As shown in FIG. 3, an opening edge 51 a on the bottom surface side of the opening 51 is an inclined surface inclined toward the printed circuit board 31. When the switch plate 41 is in the off position, the contact piece 3
8 enters the opening 51 and separates from the charging terminals 36a and 36b (see FIG. 3B). Also, the switch plate 41
Is moved toward the ON position, the contact piece 38 is pressed toward the printed circuit board 31 by the inclined opening edge 51a and comes into contact with the charging terminals 36a and 36b (see FIG. 3A).

The lens-fitted film unit 10 configured as described above is shipped with the charge button 20 positioned at the off position. When purchasing the film unit with lens 10 and performing flash photography, the photographer moves the charge button 20 exposed on the front surface of the unit main body 11 from the off position to the on position. On this occasion,
The contact piece 38 is gradually pressed toward the printed circuit board 31 by the inclined opening edge 51a, and the contact piece 38 contacts the charging terminals 36a and 36b when the charging button 20 reaches the ON position. As a result, the charging circuit of the flash device 30 operates, and charging of the main capacitor 33 is started.
Further, the engaging claw 47 of the locking plate 42 is engaged with the engaging shaft 45 of the switch plate 41, and locks the switch plate 41 at the ON position against the urging force of the spring 49. As a result, the charging circuit is maintained in the operating state.

When the photographer frames the main subject to an appropriate position and presses the shutter button 17, the synchro contacts 37a and 37b are linked with the shutter release.
Is contacted. As a result, the discharge circuit of the strobe device 30 is operated, and the strobe light is emitted from the strobe light emitting section 32, and the subject image is formed on the photographic film 26 with proper exposure.

On the other hand, the locking release lever 43 presses the pressing piece 48 of the locking plate 42 by the pressing operation of the shutter button 17, and is engaged until the engagement between the engagement shaft 45 and the engagement claw 47 is released. The stop plate 42 is moved. Engaging shaft 45 and engaging claw 4
When the engagement with the switch 7 is released, the switch plate 41 is
By the urging force of (1), it turns toward the off position. Then, the lower end 20b of the charging button 20 comes into contact with the opening edge of the opening 50 to stop the rotation of the switch plate 41, and the contact piece 38 enters the opening 51 formed in the switch plate 41, and the charging terminals 36a, 36b Separate from. As a result, the charging circuit of the strobe device 30 is opened, so that charging of the main capacitor 33 is stopped.

Thereafter, each time the photographer switches the charge button 20 to the ON position, the main capacitor 33 is charged, and the flash photography is enabled. When the shutter button 17 is pushed in for photographing operation, the switch plate 4 is moved in conjunction with the shutter release.
1 is automatically returned to the off position, and the charging circuit is opened. This allows the battery 3 to be turned off due to forgetting to turn off the charge switch.
4 is prevented from being wasted.

[0021]

As described above, according to the strobe charging switch device of the present invention, the locking plate holds the switch plate in the ON position and maintains the state where the contact piece and the charging terminal are in contact with each other. When taking a picture, the photographer only has to move the switch plate to the ON position, and the charging operation becomes easy. In addition, the engagement between the switch plate and the locking plate is released in conjunction with the pressing operation of the shutter button, so that when taking a picture, the switch plate is automatically returned to the off position and the charging circuit is opened. Become. Therefore, it is possible to prevent the battery from being wasted due to forgetting to turn off the charge switch.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing the configuration of a charging switch device of the present invention, where (A) shows a state when a strobe charging operation is performed, and (B) shows a state when a shooting operation is performed. I have.

FIGS. 2A and 2B are schematic diagrams showing a method of pressing a contact piece by a switch plate, wherein FIG. 2A shows a state when the switch plate is in an ON position, and FIG. 2B shows a state when the switch plate is in an OFF position. Each is shown.

3A and 3B are schematic diagrams supplementing the pressing method of the contact piece shown in FIG. 2, wherein FIG. 3A shows a state when the switch plate is in an on position, and FIG. 3B shows a state when the switch plate is in an off position. , Respectively.

FIG. 4 is an external view of a film unit with a built-in strobe lens embodying the present invention.

FIG. 5 is an exploded perspective view of the unit main body shown in FIG.

[Explanation of symbols]

 Reference Signs List 10 Film unit with lens 11 Unit main body 17 Shutter button 20 Charging button 30 Strobe device 31 Printed circuit board 33 Main capacitor 34 Battery 36a, 36b Charging terminal 38 Contact piece 40 Charging switch device 41 Switch plate 42 Lock plate 43 Lock release lever 45 Engagement shaft 47 Engagement claw 49 Spring

Claims (1)

[Claims] 1. A pair of charging terminals, which are provided on one substrate surface of a printed circuit board on which a strobe circuit for controlling charging and discharging is formed and open a part of the charging circuit, are connected to a conductive terminal. A strobe charge switch device for short-circuiting the main capacitor by short-circuiting with a contact piece having a contact piece between an on position where the contact piece is pressed against the charge terminal side to make contact therewith and an off position where the contact piece is separated from the charge terminal. A switch plate rotatably provided and biased by a spring toward the off position side, and a locking plate engaged with the switch plate and holding the switch plate at an on position against the biasing force of the spring. An unlocking lever provided integrally with the shutter button, for pressing the locking plate when the shutter button is pressed in and moving the locking plate to a position where the engagement between the switch plate and the locking plate is released; and Includes, flash charging switch device in conjunction with the shutter release is characterized in that so as to return the charging circuit in an open state.