JPH10239802A - Film unit with lens with built-in stroboscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent work efficiency from being reduced even when soldering places are concentrated by forming a specified hole in a minus terminal strip in contact with the minus pole of a cylindrical electric cell and then penetrating a lead of the plus pole of a main capacitor through the hole. SOLUTION: The minus pole B<-> of a cylindrical cell B is made in press contact with the end 13a of a minus contact piece 13 fixed to a printed circuit board 11, passing through between the cylindrical cell B and a main capacitor C and extending in the right direction. The lead C<+> of the plus pole of the main capacitor C is passed through the center of a hole 13b provided with the minus contact piece 13 and soldered to the printed circuit board 11. Since the minus pole of the cell B and the plus pole of the main capacitor C are in the same potential and connected to the ground, when the lead C<+> of the plus pole of the main capacitor C is to be soldered to the printed circuit board 11, it is no problem even if the solder is applied to the hole 13b provided with the minus contact piece 13 to cause a continuity between the plus pole of the main capacitor C and the minus pole B<-> of the cell B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art In recent years, competition for miniaturization of film units with lenses has intensified, and various measures have been taken.

As one of the ideas, there is a concept that space efficiency is improved by arranging, in parallel with a cylindrical battery, a strobe main capacitor which is cylindrical in shape. In particular, it is desirable that the location is below the taking lens.

Further, in a film unit with a lens having a built-in strobe, it is necessary to reduce the size of the strobe unit, and as a result, mounting accuracy of strobe parts has become more important. Among these strobe parts,
Since the neon tube is often connected to the printed circuit board with long leads, its position is difficult to determine, and it often shifts from the viewing window of the exterior member. In particular, when viewed from the tip of the neon tube, such a problem occurs particularly frequently.

In a film unit with a lens having a built-in flash, when the lead portion C5a of the main capacitor C5 is bent in a crank shape and soldered to the printed board 51 as shown in FIGS. Since the wiring pattern cannot pass through the outer edge and the degree of freedom in designing the wiring pattern is reduced, the printed circuit board 5
1 has a problem that it is difficult to reduce the size. However, FIG.
The lead portion C6 of the main capacitor C6 is simply
If a is penetrated into the printed circuit board 52 and soldered, the degree of freedom in designing the wiring pattern is not reduced, but there is a problem that the lead portion C6a comes off the printed circuit board 52 due to vibration or the like. Such a problem is similar to other electric components, but is particularly likely to occur in a relatively heavy main capacitor.

Further, in a film unit with a lens having a built-in strobe, a contact piece such as a main switch made of a metal plate is soldered to a wiring pattern side of a printed circuit board. Soldering was not possible, and soldering was performed manually in a later process.
In the case of reusing a film unit with a lens,
When the contact piece is deformed, the contact piece cannot be removed from the printed circuit board without removing the solder, which is troublesome.

[0007]

As described above, if the cylindrical battery and the main capacitor for the strobe are arranged in parallel, the space efficiency is improved, but there are the following problems. That is, the positive and negative contact pieces of the cylindrical battery are fixed to one printed circuit board, the lead portions of the plus and minus electrodes of the main capacitor are soldered, and the size of the printed circuit board is limited. In this case, a positive contact piece and a negative contact piece of a cylindrical battery are disposed at the end of the printed circuit board, and further, the lead portions of the positive and negative electrodes of the main capacitor are soldered in the vicinity thereof. As a result, there is a problem that soldering is concentrated on a narrow portion, and workability is deteriorated. In addition, since the battery contact piece for the electrode of the cylindrical battery located away from the end of the printed circuit board has a very long shape, the base of the battery contact piece is thin to facilitate the above-mentioned soldering work. Then, there is a problem that the strength of the battery contact piece is reduced.

In view of the above problem, the present invention reduces the efficiency of the soldering operation even when the soldering portions of at least the negative contact piece of the cylindrical battery and the lead portions of the positive and negative electrodes of the main capacitor are concentrated. A first object is to propose a film unit with a built-in strobe which is not to be used.

Further, as described above, the position of the neon tube is conventionally difficult to determine when viewed from the front end of the neon tube, and it often shifts from the viewing window of the exterior member. A second object is to propose a film unit with a built-in strobe lens.

Further, when a main capacitor is soldered to a printed circuit board in a film unit with a built-in lens of a strobe, the lead portion comes off the printed circuit board due to vibration or the like without affecting the design of a wiring pattern on the printed circuit board. A third object is to propose a film unit with a built-in strobe lens having no flash.

Furthermore, in the film unit with a built-in strobe lens, a contact piece made of a metal plate such as a main switch is configured so as not to require soldering, so that the problem of soldering can be solved. A fourth object is to propose a film unit with a built-in strobe in which pieces can be exchanged.

[0012]

A first object of the present invention is to dispose a cylindrical battery and a main capacitor for a strobe in parallel, and to connect at least a negative contact piece of the main battery for contact with a negative pole of the cylindrical battery. Placed on the lead part side, drilled a predetermined hole in the minus contact piece,
The problem is solved by a film unit with a built-in strobe lens, characterized in that a lead portion of a positive pole of the main capacitor is passed through the hole.

The second object is to provide a unit main body on which various photographing means are mounted, a front cover covering the front of the unit main body, and a rear cover covering the rear of the unit main body. In a film unit with a built-in strobe which visually recognizes a neon tube that is lit when charged to a voltage from the front end, a part of the front cover and a part of the unit body or the rear cover are formed on the peripheral wall of the neon tube. The problem is solved by a film unit with a built-in flash which is characterized in that the film unit is sandwiched.

The third problem is that a lead portion of an electric component for a strobe is made to pass through a hole formed in a printed circuit board for a strobe, and a tip of the lead portion is connected to a wiring pattern provided on the printed circuit board. In a film unit with a lens with a built-in strobe to be soldered, the problem is solved by any of the following means.

[0015] A film unit with a built-in strobe lens, wherein a projection or a recess is formed on the peripheral wall at the tip of the lead part of the electric component.

The tip of the lead of the electrical component is bent at a substantially right angle at a predetermined length, and a long hole is formed in the printed circuit board through which the bent tip of the lead penetrates. Film unit with built-in strobe.

A fourth object of the present invention is to provide a film unit with a built-in strobe lens having a contact piece made of a metal plate which is electrically conductive when in contact with a predetermined member. Wherein the leg is press-fitted into a hole formed in a printed circuit board for a strobe to prevent the leg from coming off at a protrusion of the leg, whereby the contact piece is engaged with the printed circuit board. It is solved by a film unit with a built-in lens.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] A first embodiment for solving the first problem will be described in detail with reference to FIG. FIG. 4 is a perspective view in which a cylindrical battery and a strobe main capacitor are arranged in parallel.

In FIG. 4, a cylindrical battery B, which is a AAA battery, and a main capacitor C for strobe are arranged in parallel below a photographic lens (not shown), and are both mounted on a printed circuit board 11 arranged on the object side. Connected. Positive pole B of a cylindrical battery B ⁺ is pressed by positive contact piece 12 which is secured to the printed circuit board 11, the negative pole B of a cylindrical battery B ^- is fixed to the printed circuit board 11, a cylindrical battery B and the main capacitor C Are pressed against each other by an end portion 13a of a minus contact piece 13 extending rightward through the space between the end portions 13a.

The lead portion C ⁺ of the positive pole of the main capacitor C is connected to a hole 13b formed in the negative contact piece 13.
Is soldered to the printed circuit board 11 through the center of the printed circuit board. On the other hand, lead portion C of the negative pole of the main capacitor C ^- is soldered to be printed board 11.

Here, a circuit diagram of the strobe will be described with reference to FIG.

In FIG. 5, B denotes a cylindrical battery, which is connected to a booster circuit VS surrounded by a two-dot chain line via one switch element SW1 of the main switch SW. The booster circuit VS is composed of an oscillation transformer T1 having a transistor Q, a primary winding T11, a secondary winding T12 and a tertiary winding, ie, a feedback winding T13, and a resistor R1. A DC current is supplied to perform an oscillating operation, and the DC current is converted into a high-voltage AC.

The alternating current supplied from the booster circuit VS is rectified by the diode D and charged in the main capacitor C. The negative pole (-) and the positive pole (+) of the main capacitor C are connected to the cathode terminal K and the anode terminal A of the xenon discharge tube Xe, and supply a discharge current to the xenon discharge tube Xe.

The lattice G of the xenon discharge tube Xe includes:
A lighting circuit is connected. The lighting circuit includes a resistor R2, a trigger switch TSW, a primary winding T21, and a secondary winding T.
It is connected between the negative pole and the positive pole of the main capacitor C via a trigger coil T2 having a pin 22.
In this lighting circuit, when the trigger switch TSW is closed in response to the shutter operation, the trigger coil TSW is connected via the resistor R2.
2, a momentary current flows through the primary winding T21, and a pulsed voltage generated in the secondary winding T22 is applied to the grid G of the xenon discharge tube Xe based on the instantaneous current, and the xenon discharge tube Xe emits light. .

Further, the lighting circuit is connected to a warning circuit AL for displaying an indication of completion of charging and for warning that the user has forgotten to turn off the switch. This warning circuit AL is inserted between the interconnection point of the resistor R2 and the trigger switch TSW and the other switch element SW2 of the strobe switch SW.
It has a series circuit of a resistor R3 and a neon tube Ne, and a capacitor C1 connected in parallel with the series circuit. The warning circuit AL is connected between both ends of the main capacitor C via the resistor R2 when the strobe switch SW is closed, and the neon tube Ne blinks to display a charge completion display and a warning to turn off the strobe switch SW.

Next, the operation of the flash circuit will be described.

First, by closing the flash switch SW, one switch element S of the flash switch SW is closed.
The boosting circuit VS is connected to the battery B via W1. As a result, the booster circuit VS operates to output a high-voltage AC. This high-voltage AC is rectified by the diode D to become a high-voltage DC, and is charged in the main capacitor C1. When the main capacitor C1 is sufficiently charged, the release button of the film unit with the lens is pressed, the shutter is operated, and the trigger switch TSW is closed.
A voltage is applied to the grid G of e, the xenon discharge tube Xe emits light, and flash photography is performed.

The charge of the main capacitor C1 is supplied to the alarm circuit AL via the resistors R2 and R3 and the other switch element SW2 of the strobe switch SW. In the warning circuit AL, the capacitor C1 is charged by the current supplied from the main capacitor C, and this charging voltage is applied to the series circuit of the resistor R3 and the neon tube Ne, so that the neon tube Ne starts discharging, that is, turns on. . The lighting voltage of the neon tube Ne causes the charging voltage of the capacitor C1 to decrease. When the voltage drops to a predetermined voltage, the neon tube Ne stops discharging and is turned off. As a result, the capacitor C1 is charged again, and when the charging voltage becomes higher, the neon tube Ne is discharged again to light up. In this way, the neon tube Ne emits blinking light. Since the flashing light serves as a charge completion display and also serves as a warning of forgetting to turn off the flash switch SW, if the flash switch SW is turned off after the end of flash shooting, the entire circuit including the warning circuit AL stops operating.

As described above, since the negative pole (-) of the battery B and the positive pole (+) of the main capacitor C are connected at the same potential on the ground side, the positive pole of the main capacitor C shown in FIG. lead portions C ⁺ the printed circuit board 11
To when soldering, takes solder hole 13b drilled in the minus contact piece 13, the negative electrode B of the positive electrode and the battery B of the main capacitor C ^- and there is no problem at all even if conducting. Accordingly, the lead portion C of the negative pole of the main capacitor C ^- Taking appropriate intervals so as not to contact the positive contact piece 12 and minus contact piece 13 of cylindrical battery B, the positive pole of the main capacitor C and the minus contact piece 13 Hole 13b
There is no problem at all even if they are close to each other.

In FIG. 4, the main capacitor C is positioned at a bent portion 13c obtained by bending a part of the negative contact piece 13.

[Second Embodiment] A second embodiment for solving the second problem will be described in detail with reference to FIG. FIG. 6A is a longitudinal sectional view centering on a neon tube, and FIG.
FIG. 7B is a sectional view taken along the line SS in FIG.

In FIG. 6, reference numeral 21 denotes a neon tube which lights or blinks when the strobe is charged to a predetermined voltage, and is soldered to the printed circuit board 22 at its lead portion 21a. Then, the neon tube 21 is visually recognized from the front end direction through the neon tube window 23 a formed in the front cover 23. To visually recognize the neon tube 21 from the tip direction,
Since the visible range is narrower than when viewed from the side, the neon tube 21 must be accurately positioned. However, if the lead portion 21a of the neon tube 21 is long, positioning is difficult.

For this purpose, a semicircular recess 23b corresponding to the outer diameter of the neon tube 21 is provided in a part of the front cover 23, and a unit body 24 on which various photographing means (not shown) are mounted.
Similarly, a semicircular recess 24a is provided, and the neon tube 21 is sandwiched between the recess 23b and the recess 24a. As a result,
The position of the neon tube 21 is accurately determined, and the neon tube window 23a
It can be visually confirmed from.

Incidentally, instead of providing the front cover 23 with a concave portion, a rear cover 25 may be provided with a concave portion.

Third Embodiment A third embodiment for solving the third problem will be described in detail with reference to FIGS. 7 to 10. FIG. 7 is a cross-sectional view of the main capacitor soldered to the printed circuit board, FIG. 8 is a cross-sectional view of another embodiment in which the main capacitor is soldered to the printed circuit board, and FIG. 9 is another view before the main capacitor is soldered to the printed circuit board. FIG. 10 is a cross-sectional view of another embodiment in which a main capacitor is soldered to a printed circuit board.

In FIG. 7, the leading end portion C1b of the lead portion C1a of the main capacitor C1 is crushed in advance by pressing it, for example, in a direction perpendicular to the plane of the paper, to project a convex portion in the horizontal direction of the drawing. The lead portion C1a thus formed is passed through the hole 31a provided in the printed board 31 from below, and soldering is performed on the upper surface. As a result, the solder 32 enters under the protrusion of the tip C1b, and the lead C1a does not easily come off.

As shown in FIG. 8, the main capacitor C2
A concave portion may be provided at the tip end portion C2b of the lead portion C2a, and soldered to the printed circuit board 31. At this time, since the solder 32 enters the concave portion of the distal end portion C2b, the lead portion C2a similarly does not easily come off.

In addition, even if the shape of the concave portion is like a saw tooth,
A spiral shape such as a screw may be used, and any shape may be used.

Further, as shown in FIG. 9, the leading end portion C3b of the lead portion C3a of the main capacitor C3 is bent at a predetermined length substantially at a right angle, and the elongated hole through which the bent leading end portion C3b penetrates the printed circuit board 31 penetrates. If the tip portion C3b is provided and the tip portion C3b is penetrated through the long hole 31b and soldered so as to be hooked on the printed circuit board 31, as shown in FIG. 10, the lead portion C3a will not easily come off similarly.

Also, in this case, unlike FIG. 1, the wiring pattern 31c can be passed through the outer edge of the printed board 31.

In the above embodiment, the mounting of the main capacitor has been described. However, the present invention can be used not only for the main capacitor but also for other electric parts.

[Fourth Embodiment] A fourth embodiment for solving the fourth problem will be described in detail with reference to FIGS. FIG. 11 is a perspective view of a switch contact, etc., FIG. 12 is a cross-sectional view when the switch contact is off, and FIG. 13 is a cross-sectional view when the switch contact is on.

In FIG. 11, reference numeral 41 denotes a switch contact piece formed of an elastic metal plate and constituting a main switch of the strobe, and has four legs 41a (two are hidden and not visible). , Leg 41a has a projection 41b. The printed circuit board 42 has four long holes 42a corresponding to the legs 41a of the switch contact piece 41. When the leg 41a of the switch contact piece 41 thus formed is pressed into the long hole 42a of the printed circuit board 42, the leg 41a does not come off from the long hole 42a by the protrusion 41b, and the switch contact piece 41 is soldered. It does not need to be performed, and is attached to the printed circuit board 42. At this time, the end 41b of the switch contact piece 41 is pressed against the wiring pattern of the printed circuit board 42 to conduct electricity.

When the switch contact piece 41 is removed from the printed circuit board 42 for recycling or the like, the switch contact piece 41 can be removed by pressing the tip of the leg 41a from the back side of the printed circuit board 42 with a tool.

Referring to FIGS. 12 and 13, an embodiment in which the switch contact piece is used for a main switch of a strobe will be described.
The end 41b of the switch contact piece 41 is engaged with the predetermined pattern provided on the strobe substrate 42 as described above, and the other end 41c is bent so as to be able to be pressed against the predetermined pattern provided on the other strobe substrate 43. I do. Reference numeral 44 denotes a switch operation member manually operated by the photographer. When the power switch is turned on, the switch operation member 44 is slid to the left, and FIG.
The state of FIG. 13 is changed from the state of FIG. Then, the trapezoidal protrusion 41 d is pressed by the inner portion 44 a of the switch operation member 44, and the end 41 c is pressed against a predetermined pattern provided on another strobe substrate 43. Therefore, the predetermined pattern provided on the strobe substrate 42 and the predetermined pattern provided on the strobe substrate 43 conduct, and the power switch is turned on.

Incidentally, 45 is a front cover, and 46 is a unit body.

When the power switch is turned off, the switch operating member 44 may be operated rightward to bring it to the state shown in FIG. 12, but the end 41c of the switch contact piece 41 is restored by its own elastic force.

Here, the apex 46a of the unit body 46
Are parallel to the strobe substrates 42 and 43, and the end 44b of the switch operating member 44 is at the apex 4 regardless of whether the power switch is turned off as shown in FIG. 12 or turned on as shown in FIG.
6a, the intermediate portion 41e of the switch contact piece 41 is always sandwiched. Therefore, in the state shown in FIG. 12, the positions of the end portion 41c and the protrusion 41d are determined, and the inner portion 44a of the switch operation member 44 can always press the trapezoidal protrusion 41d at the same position. Operating force is constant and does not vary from product to product.

When the power switch is turned on as shown in FIG. 13, the tip end 44c of the switch operating member 44 protrudes from the side wall of the front cover 45, so that the user can visually recognize that the power switch is turned on.

[0050]

According to the film unit with a lens with a built-in strobe according to the first to third aspects, at least the soldering portions of the negative contact piece of the cylindrical battery and the lead portions of the plus and minus electrodes of the main capacitor are concentrated. At this time, since the negative contact piece of the cylindrical battery and the lead portion of the positive electrode of the main capacitor have the same potential, no problem occurs even if both are conducted by the soldering work, and the work efficiency of the soldering is reduced. Nothing.

According to the film unit with a built-in strobe lens according to the fourth aspect, when the neon tube is viewed from the front end direction, the neon tube is accurately positioned even if the lead portion is long, so that the neon tube can be surely seen through the viewing window of the exterior member. You can see it.

According to the film unit with a built-in strobe lens according to the fifth to seventh aspects, it is possible to prevent an electric component for a strobe, particularly a relatively heavy main capacitor, from coming off the printed board by vibration or the like with a simple structure.

According to the film unit with a lens with a built-in strobe according to claims 8 to 9, the soldering of the contact pieces is unnecessary only by press-fitting the contact pieces into the printed circuit board, so that the assembly can be automated. Also, when the contact piece is removed at the time of recycling or the like, it is possible to easily remove the contact piece without removing the solder.

[Brief description of the drawings]

FIG. 1 is a perspective view of a conventional technique before a main capacitor is soldered to a printed circuit board.

FIG. 2 is a cross-sectional view of a conventional technique in which a main capacitor is soldered to a printed circuit board.

FIG. 3 is a cross-sectional view of a conventional technique in which a main capacitor is soldered to a printed circuit board.

FIG. 4 is a perspective view in which a cylindrical battery and a main capacitor for a strobe are arranged in parallel.

FIG. 5 is a circuit diagram of a strobe light.

FIG. 6 is a diagram showing a configuration for positioning a neon tube.

FIG. 7 is a cross-sectional view of a main capacitor soldered to a printed circuit board.

FIG. 8 is a sectional view of another embodiment in which a main capacitor is soldered to a printed circuit board.

FIG. 9 is a perspective view of another embodiment before the main capacitor is soldered to a printed circuit board.

FIG. 10 is a sectional view of another embodiment in which a main capacitor is soldered to a printed circuit board.

FIG. 11 is a perspective view of a switch contact piece and the like.

FIG. 12 is a cross-sectional view when a switch contact piece is off.

FIG. 13 is a cross-sectional view when the switch contact piece is turned on.

[Explanation of symbols]

 B Cylindrical battery C, C1, C2, C3 Main capacitor C1a, C2a, C3a Lead portion 11, 22, 31, 42 Printed circuit board 13 Negative contact piece 13b hole 21 Neon tube 23 Front cover 23b recess 24 Unit body 24a recess 41 Switch Contact piece 41a Leg 41b Projection

Claims (9)

[Claims] 1. A cylindrical battery and a strobe main capacitor are arranged in parallel, and at least a negative contact piece contacting a negative pole of the cylindrical battery is arranged on a lead portion side of the main capacitor, and the negative contact is provided. A film unit with a built-in strobe lens, characterized in that a predetermined hole is formed in a piece and a lead portion of a positive pole of the main condenser is made to pass through the hole. 2. The film unit with a built-in flash according to claim 1, wherein the cylindrical battery and the main capacitor for the flash are arranged in parallel below a photographing lens. 3. The film unit with a built-in strobe lens according to claim 1, wherein the cylindrical battery is a AAA battery. 4. A unit main body on which various photographing means are mounted, a front cover covering the front of the unit main body, and a rear cover covering the rear of the unit main body, and the strobe is charged to a predetermined voltage. In a film unit with a built-in strobe that visually recognizes a neon tube that is lit when viewed from the front end, it is preferable that a peripheral wall of the neon tube is sandwiched between a part of the front cover and a part of the unit body or the rear cover. Characteristic film unit with built-in strobe lens. 5. A built-in strobe for penetrating a lead of an electric component for a strobe through a hole formed in a printed circuit board for a strobe, and soldering a tip of the lead to a wiring pattern provided on the printed circuit board. A film unit with a built-in strobe, wherein a projection or a recess is formed on a peripheral wall of a tip portion of a lead portion of the electric component. 6. A built-in strobe for penetrating a lead portion of an electric component for a strobe through a hole formed in a printed circuit board for a strobe, and soldering a tip portion of the lead portion to a wiring pattern provided on the printed circuit board. In the film unit with a lens, the leading end of the lead portion of the electric component is bent at a substantially right angle at a predetermined length, and a long hole is formed in the printed circuit board through the bent leading end of the lead portion. A film unit with a built-in strobe lens. 7. The film unit with a built-in strobe lens according to claim 5, wherein the electric component is a main capacitor for a strobe. 8. A film unit with a built-in strobe having a contact piece made of a metal plate that is electrically conductive when in contact with a predetermined member, wherein the contact piece is provided with a leg having a projection at a tip end, and the leg is provided. Wherein the contact piece is engaged with the printed circuit board by press-fitting into a hole formed in a printed circuit board for a strobe to prevent the contact piece from coming off at the protrusion of the leg. . 9. The film unit with a built-in strobe lens according to claim 8, wherein the contact piece is a contact piece for a main switch.