JPH11167147A - Structure of stroboscope device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To connect a trigger armature and a reflector by preventing an influence on the luminous intensity distribution pattern of strobe light. SOLUTION: The reflector 37 consists of a condensing curved surface part, 40 curved to cover the back, top and bottom of a stroboscopic tube 36 and side surface parts 41 provided on both sides of the curved surface part 40. The discharge tube main body 36a of the stroboscopic tube 36 is in contact with the inside surface of the condensing curved surface part, 40. In the trigger armature 45, one end 45b of it is connected to the trigger output terminal of a trigger transformer 54 and the other end 45c comes into contact with the outside surface of the side surface part 41 reduced in the influence on the luminous intensity distribution pattern of the strobe light, to press the outside surface, even if the other end 45c is deformed. A trigger voltage developed across the trigger transformer 54 is applied to the reflector 37 through the trigger armature 45 and further, the discharge tube main body 36a from the reflector 37.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a strobe device, and more particularly to a structure of a strobe device for applying a trigger voltage from a trigger contact to a strobe discharge tube via a reflector.

[0002]

2. Description of the Related Art A film unit with a lens in which an unexposed photographic film is loaded in advance in a unit body having a built-in simple photographing mechanism is manufactured and sold by the present applicant. There are various types of film units with lenses, and some have built-in strobe devices so that they can be taken indoors or at night. The strobe device built into such a film unit with a lens has a simplified structure in order to manufacture the film unit with a lens at low cost, and prints electrical components forming a strobe light emitting unit and a strobe circuit. Attached to the substrate and unitized.

[0003] The structure of the above-mentioned strobe light emitting portion is such that a strobe discharge tube (flash tube) which emits light by discharging the electric charge charged in the main capacitor therein, and the light of this strobe discharge tube in a predetermined light distribution pattern. It comprises a reflector curved to reflect forward, a diffuser plate, and a reflector case for housing and holding these. As is well known, a strobe discharge tube has a discharge tube body made of glass filled with Xe gas. In order for the strobe discharge tube to emit light, a high voltage from the trigger transformer, for example, 4 KV trigger voltage is applied to the outer peripheral surface of the discharge tube main body while a predetermined voltage is applied to both terminals by the main capacitor. It is necessary to apply a current and ionize the internal Xe gas.

As a structure for supplying such a trigger current to the strobe discharge tube, a structure in which a conductive wire is directly wound around the discharge tube main body and a trigger voltage is directly applied from the wire to the discharge tube main body is used. In general, a discharge tube main body is brought into contact with an inner surface of a reflector having the above structure, a trigger voltage is applied to the reflector, and a trigger voltage is applied to the discharge tube main body via the reflector.

In order to apply a trigger voltage to the reflector, a lead wire from an output terminal of the trigger transformer is connected to the reflector, or a metal trigger contact is brought into contact with the reflector. Applying trigger voltage from trigger transformer. However, when a lead wire is used, it is difficult to automatically assemble it by a machine. Therefore, a metal contact piece is generally used.

[0006]

In the case where the trigger contact piece is used as described above, the trigger contact piece presses the reflector with a constant pressure in order to reliably apply a trigger voltage to the reflector. However, the shape of the reflector is deformed by the pressing of the trigger contact piece, and the light distribution pattern of the strobe light several meters away from the strobe device changes from the one intended by the design. was there. If the light distribution pattern changes, the resulting photograph will have exposure unevenness.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem. By defining the contact position of the trigger contact piece with the reflector, the strobe light distribution caused by the trigger contact piece pressing the reflector is provided. An object of the present invention is to provide a structure of a strobe device that can prevent a change in a light pattern.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, the trigger contact piece is arranged so as to press the outer surface of the side surface of the reflector to make contact with the reflector. The trigger contact piece presses the reflector to prevent a change in the light distribution pattern. In the invention according to claim 2, the trigger contact piece is disposed so as to press and contact the ridge portion of the outer surface of the reflector case and is electrically connected to the reflector,
This prevents a change in the light distribution pattern caused by the trigger contact piece pressing the reflector. According to the third aspect of the present invention, the trigger voltage is output from the trigger transformer, and one end of the trigger contact piece is directly connected to the trigger transformer and the other end is directly connected to the reflector. Things.

[0009]

FIG. 2 shows an external view of a film unit with a lens incorporating a strobe device embodying the present invention. The lens-fitted film unit 10 is a unit body 1 having a simple photographing mechanism and an unexposed photographic film.
1 and a label 12 that covers a part of the unit body 11. The label 12 is wound so as to expose the photographing lens 13, the finder 14, the winding knob 15, the shutter button 16, the strobe light emitting unit 17, and the like.

A charging button 18 is provided on the front side of the unit body 11 below the strobe light emitting section 17. By pressing the charge button 18, the main capacitor 30 (see FIG. 3) is charged.

FIG. 3 is an exploded view of the unit body 11. The unit body 11 includes a cartridge 20a of the film cartridge 20 and the cartridge 20a.
a main body base 21 into which a photographic film 20b pulled out from the main body 21 is loaded, an exposure unit 22 and a strobe device 23 mounted on the front surface of the main body base 21, and a main body base 2
1, a front cover 24 that covers the exposure unit 22 and the strobe device 23, and a rear cover 25 that is mounted on the back side of the main body base 21 and stores the photographic film 20b between the main body base 21 in a light-tight manner. And a battery 26 serving as a power supply for the strobe device 23.

The exposure unit 22 includes a counter mechanism for displaying the number of frames that can be photographed, a shutter mechanism, a one-frame feed mechanism for feeding the photographic film one frame at a time, and the photographic lens 1.
3, and the finder 14 are assembled into a unit.

The main body base 21 is provided with a cartridge chamber 21a in which the cartridge 20a is loaded and a film storage chamber 21b for storing a rolled unexposed photographic film 20b. These bottom surfaces are open, and bottom covers 25a, 25 formed on the rear cover 25 are provided.
b. Bottom cover 25 of cartridge chamber 21a
a is openable and closable by engaging a claw, and serves as a take-out lid for taking out the cartridge 20a containing the photographed photo film 20b.

A winding knob 15 is rotatably disposed above the cartridge chamber 21a. This winding knob 1
5 is rotated in the counterclockwise direction in the drawing, the photographed photo film 20b is taken in the cartridge 20a, and the unexposed portion is pulled out of the film storage chamber 21b, and set behind the aperture 21c. Is done.

A release button 16 is integrally formed on the upper surface of the front cover 24. Also, the front cover 24
An opening for exposing the photographing lens 13, the finder 14, and the strobe light emitting unit 17 is formed on the front surface of the camera, and a charge button 18 is integrally formed.

The strobe device 23 includes a strobe light emitting unit 1
7, electrical components such as a main capacitor 30, a battery 26, and a pair of electrode plates 31a and 31b for holding the battery 26 and connecting to a strobe circuit, a synchro switch 32, a charging switch 33, and the like are assembled on a printed circuit board 35. It is a thing.

The synchro switch 32 is formed by arranging two metal contacts vertically at a predetermined interval. When the shutter blades are fully opened by the shutter mechanism, the upper metal contacts are elastically deformed downward. ON by contacting the lower metal contact piece. The charging switch 33 includes a pair of wiring patterns 33a formed on the printed circuit board 35 and a metal contact piece 33b. When the charge button 18 is pressed, the charge switch 33 is turned on.
Is in contact with the pair of wiring patterns 33a and is turned on by connecting these.

As shown in FIG.
Comprises a strobe discharge tube 36, a reflector 37, a diffusion plate 38, and a reflector case 39.
As is well known, the strobe discharge tube 36 is formed by enclosing a Xe gas in a cylindrical discharge tube body 36a, and a high voltage, for example, 4 KV, in a state where a predetermined voltage is applied to both terminals 36b by the main capacitor 30. Is applied to the outer peripheral surface of the discharge tube main body 36a, so that the internal X
e gas is ionized. As a result, the electric charge charged in the main capacitor 30 due to the breakage of the insulation between the terminals 36b is discharged in the discharge tube main body 36a, and the strobe light is emitted.

The reflector 37 is formed by bending a thin metal plate having conductivity, for example, an aluminum plate, and integrally forming the light-condensing curved surface portion 40 and the side surface portion 41. The condensing curved surface portion 40 has a shape that is curved so as to open in the strobe light irradiation direction, covers the back and top and bottom of the discharge tube main body 36a, and transmits light emitted from the discharge tube 12 to the diffusion plate 11 on its inner surface. To reflect. The curved shape of the condensing curved surface portion 40 has an elliptical arc, a circular arc, or a straight line so that the strobe light is irradiated in front of the lens-equipped film unit 10 through the diffusion plate 38 in a predetermined light distribution pattern. , A parabola and the like.

The side surface portion 41 is provided so as to cover both ends of the curved converging curved surface portion 40 in the direction along the axis of the discharge tube main body 36a, and the inner surface thereof forms an inner surface of the discharge tube main body 36a.
Of the discharge tube body 3 by reflecting the strobe light from
6 is provided to control the light distribution pattern of the strobe light in the direction along the axis of No. 6. Holes 41a into which the discharge tube main bodies 36a are inserted are formed in the respective side surface portions 41.

The reflector case 39 is formed by molding plastic, and a portion of the side surface portion 41 facing each hole 41a holds both ends of the discharge tube body 36a.
A holding member 39a for holding the strobe discharge tube 36 is formed. On one side of the reflector case 39, an engagement claw 39b and a pin 39c are formed.
Thus, the strobe light emitting unit 17 is attached to the printed circuit board 35.

The strobe discharge tube 36 is passed through the hole 41a of the reflector 37 in a state where the reflector 37 is fitted in the reflector case 39, and the outer peripheral surface of the discharge tube main body 36a comes into contact with the inner surface of the condensing curved surface portion 40. It is assembled so that Thus, the trigger voltage is applied to the discharge tube main body 36a via the reflector 37. The reflector 37 is fixed to the reflector case 39 by assembling the strobe discharge tube 36.

The diffusion plate 38 is attached to the front of a reflector case 39 in which the reflector 37 and the strobe discharge tube 36 are assembled, and diffuses the strobe light from the strobe discharge tube 36 and the strobe light reflected by the reflector 37.

FIG. 5 shows the back side of the strobe device 23.
In FIG. 5, the main capacitor 3 is used for explanation.
0 is shown in an upright state and the trigger contact piece 45 is separated. Behind the strobe light emitting section 17, a main condenser 30 is disposed, and a strobe discharge tube 36 is provided.
Each terminal 36b is connected to a wiring pattern on a printed circuit board 35 connected to each terminal of the main capacitor 30 by strobe contacts 46a and 46b.

On the back side of the printed circuit board 35, in addition to the main capacitor 30, an oscillating transistor 50, an oscillating transformer 51, and a rectifying diode 52 constituting a booster circuit are provided.
Further, a trigger capacitor 53, a trigger transformer 54, a light emitting diode 55 for displaying a charge completion display, and the like are provided. Each of these electrical components has its lead terminal passed through a through-hole in the printed circuit board 35, and the printed circuit board 3
5 is soldered to the front land. Note that the chip-type electric component is surface-mounted by directly soldering to a wiring pattern on the front surface of the printed circuit board 35.

The trigger transformer 54 includes a trigger capacitor 53 charged by a booster
When 2 is turned on and discharged, this discharge current flows to the primary side, thereby generating a trigger voltage of, for example, 4 KV on the secondary side. This trigger voltage is output from a trigger output terminal 54a protruding from the upper part of the trigger transformer 47.

The trigger contact piece 45 is formed by processing a conductive metal plate. A hole 45 a formed in the trigger contact piece 45 is fitted into a pin 58 provided integrally with the reflector case 39, so that the stroboscopic device 23 is formed. Has been assembled. One end 45b of the trigger contact piece 45 is attached to the trigger output terminal 54a, and the other end 45c is inserted into the reflector case from the side of the reflector case 39 as shown in FIG.

As shown in FIG. 1 showing the connection between the trigger transformer 54 and the reflector 37 by the trigger contact piece 45, one end 45b of the trigger contact piece 45 is electrically connected to the trigger output terminal 54a by caulking. The other end 45c contacts and is electrically connected to the outer surface of the one side surface portion 41 in the reflector case 39. The other end 45c is slightly bent toward the side surface portion 41, and presses the side surface portion 41 with a predetermined pressure so that electrical connection is ensured.

The reflector 37 has a condensing curved surface portion 40 as shown in FIG.
Concentrated curved surface 4
If a deformation occurs to 0, the light distribution pattern several meters ahead of the strobe light several meters ahead changes from the design. For this reason, the other end 45c of the trigger contact piece 45 is brought into contact with the side surface portion 41 which is hardly deformed by the axial force of the strobe discharge tube 36 and has little influence on the light distribution pattern even if deformed. .

The trigger voltage output from the trigger output terminal 54a is applied to the side surface 41 of the reflector 37 via the trigger contact piece 45, and from the side surface 41, the condensing curved surface 4
After that, the trigger current is applied to the discharge tube main body 36a through 0 and a trigger current flows through the strobe discharge tube 36.

Next, the operation of the above configuration will be briefly described. The film unit with lens 10 is
During the transfer, the exposure unit 22 and the strobe device 23, which are manufactured on different manufacturing lines, respectively,
1 and a film cartridge 2
And the front cover 24 and the rear cover 25 are attached to complete the unit body 11. Then, the label 12 is wound around the unit main body 11, whereby the film unit with lens 10 is completed.

In the manufacture of the strobe device 23, the main capacitor 30 and the oscillation transistor 5
The electrical components with lead terminals and the chip-type electrical components, such as the reference numeral 0, the oscillation transformer 51, the trigger capacitor 53, and the trigger transformer 54, are attached, and each electrical component is soldered to the land. Thereafter, the printed circuit board 35 is sent to an assembling step of the strobe light emitting unit 17.

On the other hand, in the strobe light emitting section 17, the strobe discharge tube 36, the reflector 37, and the diffusion plate 38 are assembled in a reflector case 39, and the strobe contact piece 4 is provided.
6a and 46b are assembled and soldered to each terminal 36b of the strobe discharge tube 36. Of course, the discharge tube body 3
6a is brought into contact with the inner surface of the condensing curved surface portion 40,
A strobe discharge tube 36 is assembled.

Thereafter, the hole 45a of the trigger contact piece 45 is fitted into the pin 58 by the automatic assembling device, and the trigger contact piece 45 is assembled to the reflector case 39. At this time, the other end 45 c of the trigger contact piece 45 is inserted into the reflector case 39 from the side of the reflector case 39, and the other end 45 c contacts the outer surface of the side surface 41. Since the trigger contact piece 45 is positioned and fixed by the pin 58, the slightly bent other end 45c contacts the outer surface of the side surface portion 41 with a predetermined pressure so as to press the trigger contact piece 45 and the reflector 37. Are electrically connected.

The strobe light emitting unit 1 completed in this way
7 is mounted on the printed circuit board 35. In this assembly, the engaging claws 39b of the reflector case 39 and the pins 3 are positioned from above with the back surface of the printed circuit board 35 facing upward.
By inserting 9 c into a mounting hole (not shown) of the printed circuit board 35, the strobe light emitting unit 17 is assembled to the printed circuit board 35. At the same time, the trigger output terminal 54a of the trigger transformer 54 is inserted into a hole provided at one end 45b of the trigger contact piece 45, and these are caulked and fixed.

When the strobe device 23 is completed in this way, the completed strobe device 23 is sent to an inspection process, where soldering inspection and strobe light emission inspection are performed. It is sent to the assembly process to the main body 21.

In the inspection of the strobe light emission, in addition to the inspection of whether or not the strobe light emission is normally performed, the inspection of the light distribution pattern of the strobe light is also performed. In this inspection, after charging the main capacitor 30 and the trigger capacitor 53 in the same manner as in the actual photographing, the synchro switch 32 is turned on to emit strobe light. When the synchro switch 32 is turned on, the trigger capacitor 53 is discharged, a trigger voltage is generated on the secondary side of the trigger transformer 54, and is output from the trigger output terminal 54a. This trigger voltage is applied to the outer peripheral surface of the discharge tube main body 36a via the trigger contact piece 45 and the reflector 37. As a result, a trigger current flows through the strobe discharge tube 36, the main capacitor 30 is discharged, and strobe light is emitted.

Most of the strobe light emitted from the strobe discharge tube 36 is reflected by the inner surface of the condensing curved surface portion 40,
Some strobe light is reflected on the inner surface of each side surface portion 41,
The light is emitted forward through the diffusion plate 38.

As described above, the other end 45c of the trigger contact piece 45 is relatively strong and presses and contacts the reflector 37, which has little effect on the light distribution pattern. Assembling position, reflector 37
Even if the accuracy such as the contact position may slightly change, the number of strobe devices 23 rejected by this inspection is small. In other words, the probability of occurrence of the strobe device 23 in which the light distribution pattern is greatly changed to be defective is low.

Also, for example, when the assembling of the strobe device 23 is being advanced, improvements are made to the assembling device of the trigger contact piece 45, and even if the pressure applied by the trigger contact piece 45 to the reflector 37 changes. Since the light distribution pattern of the strobe light is hardly affected, the accuracy and characteristics of the assembling apparatus can be varied.

Further, since the other end 45c of the trigger contact piece 45 can be brought into contact with the reflector case 37 with a large pressure, the trigger voltage from the trigger transformer 54 is applied in a reliable and stable state, and the strobe discharge tube Since a trigger current can be supplied to the strobe 36, strobe light emission is stabilized.

The film unit with lens 10 incorporating the strobe device 23 that has passed the inspection is shipped and used for photographing by the user.
Even if the contact position, pressure, and the like of the trigger contact piece 45 with respect to the reflector 37 change due to impact, vibration, and the like, an appropriate strobe light distribution pattern can be obtained for the same reason as described above. There is no uneven light distribution of the strobe light caused by the contact with the strobe light. Therefore, a photograph obtained by flash photography is excellent without exposure unevenness.

FIG. 6 shows the ridge 60 of the reflector 37 formed at the boundary between the condensing curved surface 40 and the side surface 41.
This shows an example in which the other end 45c of the trigger contact piece 45 is brought into contact. The ridge 60 is formed by the reflector 3
7 is a bent portion, the strength of the reflector 3 is high even when the other end 45a of the trigger contact piece 45 is contacted and pressed.
7 is not deformed, so that the light distribution pattern is not affected.

The outer surface of the light-condensing curved surface portion 40 of the reflector 37, which is in contact with the discharge tube main body 36a, has an arcuate cross section, and the most rearwardly projecting portion is extremely deformed. Because it is a difficult ridge 40a,
Here, even if the other end 45c of the trigger contact piece 45 is contacted and pressed, the light distribution pattern can be prevented from being affected. Of course, even in the case of reflectors of other shapes, the ridge portion has high strength, so that an appropriate light distribution pattern can be obtained by contacting and pressing the trigger contact piece against this portion.

In the above embodiment, the trigger output terminal of the trigger transformer and the reflector are connected by the trigger contact.
The trigger output terminal and the trigger contact piece may be connected with a lead wire or the like, and this trigger contact piece may be fixed to the reflector case and contact the reflector at the end, but as described in the above embodiment, If the trigger transformer is connected to the reflector using only the trigger contact piece, the number of parts can be reduced and the automatic assembly can be advantageously performed. Further, in the above-described embodiment, the strobe device built in the film unit with a lens has been described. However, the present invention can also be used for a strobe device built in or attached to various cameras.

[0046]

As described above, according to the structure of the strobe device of the present invention, in the strobe device for applying a trigger voltage to the discharge tube main body of the strobe discharge tube from the trigger contact piece via the reflector, The trigger contact piece is pressed against the outer surface of the side surface provided at both ends of the converging curved surface in the direction along the axis of the discharge tube body, and is electrically connected to the reflector. Therefore, the change of the light distribution pattern of the strobe light can be almost eliminated.
In addition, since the trigger contact piece is pressed against the ridge of the reflector bent into a predetermined shape and arranged so as to be in contact with it and electrically connected to the reflector, the light distribution pattern changes because the reflector does not deform do not do.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a connection state between a trigger contact piece and a reflector of a flash device embodying the present invention.

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

FIG. 3 is an exploded perspective view showing the unit main body in an exploded manner.

FIG. 4 is an exploded perspective view showing an exploded strobe light emitting unit.

FIG. 5 is a perspective view showing the strobe device from the back.

FIG. 6 is a perspective view showing an example in which a trigger contact piece is brought into contact with a ridge portion of a reflector.

[Explanation of symbols]

 17 Strobe Lighting Unit 23 Strobe Device 36 Strobe Discharge Tube 37 Reflector 40 Condensing Curved Surface 40a, 60 Ridge 41 Side Side 45 Trigger Contact 54 Trigger Transformer

Claims (3)

[Claims] 1. A strobe discharge tube which emits light by applying a trigger voltage to a discharge tube main body, a condensed curved portion curved so as to cover the back and top and bottom of the discharge tube main body, and along an axis of the discharge tube main body. And the side surfaces provided at both ends of the converging curved surface in the same direction, and have conductivity to reflect the strobe light emitted from the discharge tube body on the inner surface so as to form a predetermined light distribution pattern. And a trigger contact piece for applying a trigger voltage to the discharge tube main body through the reflector to emit a strobe light, wherein the trigger contact piece contacts the outer surface of the side surface portion by pressing. A strobe device that is electrically connected to the reflector and prevents a change in the light distribution pattern caused by the trigger contact piece pressing the reflector. 2. A stroboscopic discharge tube which emits light by applying a trigger voltage to a discharge tube main body, and a predetermined shape for reflecting strobe light emitted from the discharge tube main body in a predetermined light distribution pattern. A strobe device comprising a bent conductive reflector and a trigger contact for applying a trigger voltage to the discharge tube main body via the reflector to emit strobe light, wherein the trigger contact is an outer surface of the reflector case. A strobe which is arranged so as to press and contact the ridge portion of the light source and is electrically connected to the reflector to prevent a change in the light distribution pattern caused by the trigger contact piece pressing the reflector. The structure of the device. 3. The trigger voltage is output from a trigger transformer, and one end of the trigger contact piece is directly connected to the trigger transformer and the other end is directly connected to a reflector, respectively. Claim 1 or 2
Structure of the described strobe device.