JPH05165085A - Strobe device for photograph - Google Patents

Abstract

PURPOSE:To prevent strobe parts from breakage or damage even in case that external shock is applied or internal stresses are generated. CONSTITUTION:To give a trigger signal to a discharge tube 23, a trigger electrode plate 24 having resilience is installed in such a way as enclosing the back of a refletor 22, and a light emission part 20 is provided holding the reflector 22 and discharge tube 23 consolidatedly which are arranged between the trigger electrode plate 24 and a diffusion plate 21 by coupling the top and bottom of the plate 24 with the diffusion plate 21. When this light emission part 20 is set in a specified position on a strobe base board 26, areas 27b, 28b of conductive resilient members 27, 28 in connection with the circuit pattern provided on the strobe base board are connected by resilient contacting with lead terminals 23a, 23b protruding at the ends of the strobe discharge tube 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strobe device for illumination used for photographing.

[0002]

2. Description of the Related Art Among the film units with a lens, which are provided at a low price, by incorporating a simple photographing mechanism into a container with a built-in film, a film unit with a lens equipped with a strobe device, "Sharp Run Flash", etc. There is. By the way, in the strobe device used for the lens-fitted film unit as described above, it is desirable to simplify the structure of the strobe light emitting part and to reduce the cost by mass production because it is required to be as low cost as possible. ..

A light emitting portion of such a strobe device is shown in FIG. The light emitting unit 10 includes a diffusion plate (not shown) and a reflector 1.
2, discharge tube 13, trigger electrode plate 14, and holding member 15
It consists of and. These assemblies are fitted into the holding member 15 with the discharge tube 13 inserted in the reflector 12 having the trigger electrode plate 14 attached thereto. Supporting portions 15a and 15b for supporting the discharge tube 13 are provided on both sides of the holding member 15.
The lead terminals 13a and 13b protruding from both ends of the discharge tube 13 are bent at a right angle after being inserted into the reflector 12.

A strobe circuit is formed on the strobe substrate 16, and the through holes 15a, 15 of the strobe circuit are formed.
Each of the lead terminals 13a and 13b is inserted into the terminal b from the tip thereof. After that, these portions are soldered to hold the light emitting portion 10 on the strobe substrate 16. After that, a diffusion plate (not shown) is attached to the front surface of the holding member 15, and one end of the trigger electrode plate 14 is connected to the secondary electrode of the trigger transformer to complete the assembly of the strobe device.

[0005]

However, the lead terminals 13a and 13b described above have a large wire diameter and are bent at a right angle in order to pass a high-voltage current and to improve the insertion position accuracy by automation. Therefore, the rigidity is high, and when the lead terminals 13a and 13b are inserted into the through holes 16a and 16b of the strobe board 16 by the automatic assembling apparatus, if the lead terminals 13a and 13b contact with each other even a little, the lead terminal 13
There is a drawback that an impact force is applied to the discharge tube 13 via a and 13b, and the glass portion of the discharge tube 13 is cracked or damaged.

When the discharge tube 13 and the strobe board 16 contract due to a change in temperature, the lead terminals 13a and 13b to which the solder is soldered are too rigid, so that the discharge tube 13 and the strobe board 16 are not rigid. There is a risk that a load will be applied to any of these and cracks will occur in them.

The present invention has been made in view of the above circumstances,
Photograph with a structure that allows for some space in the electrical connection between both terminals of the strobe discharge tube and the strobe board so that the discharge tube will not be damaged or damaged even if external impact or internal stress occurs. An electronic flash device is provided.

[0008]

According to a first aspect of the present invention, there is provided a photographic strobe device including a strobe substrate on which a strobe circuit is formed, and a light emitting section mounted on the strobe substrate and incorporating a reflector and a discharge tube. Both terminals of the strobe discharge tube are elastically and electrically connected to a strobe substrate.

In the second invention, a trigger electrode plate having elasticity for applying a trigger signal to the discharge tube is provided so as to cover the back surface of the reflector, and the upper and lower ends of the trigger electrode plate are connected to the diffusion plate. In a photographic strobe device having a light emitting unit integrally holding a reflector and a discharge tube arranged between them, a part of a conductive elastic member connected to a circuit pattern provided on a strobe substrate, The strobe discharge tube is elastically contacted with the lead terminals protruding from both ends.

According to a third aspect of the present invention, in a photographic strobe device in which a lead terminal protruding from both ends of a strobe discharge tube and a strobe substrate on which a strobe circuit is formed are electrically connected, the lead terminals are a plurality of thin lines. It is a metal wire formed by tying together metal wires, and the metal wire is bent in a loop shape between the discharge tube and the strobe substrate.

[0011]

EXAMPLE A strobe device according to the first example will be described. As shown in FIG. 2, the light emitting section 20 of the strobe device includes a diffusion plate 21, a reflector 22, a discharge tube 23, and a trigger electrode plate 24.

The trigger electrode plate 24 is formed by bending a thin sheet of material having conductive elasticity into a U-shape having an upper tip portion 24a, a lower tip portion 24b and a central portion 24c. ing. The upper tip portion 24a and the lower tip portion 24b are T-shaped, and are arranged at intervals such that the reflector 22 is vertically sandwiched from the back surface. Then, the trigger electrode plate 24 is covered from the back surface of the reflector 22 while spreading the upper tip portion 24a and the lower tip portion 24b thereof, and these are formed in a T shape provided on the upper and lower surfaces of the diffusion plate 21. Notch parts 21a, 21
engage b.

The diffusing plate 21 is provided with pressing portions 21c and 21d, each of which has a U-shaped tip projecting from the rear surface of both sides, and these pressing portions 21c and 21d are the discharge tubes 23.
Press. Accordingly, the trigger electrode plate 24 and the diffusion plate 21
Between the discharge tube 23, the reflector 22, and the trigger electrode plate 24.
And are held together in an elastically contacting state.

As is well known, the strobe board 26 shown in FIG. 1 is provided with a strobe circuit on which a power supply circuit, a main capacitor, a trigger capacitor and the like are mounted. The lead terminals 23a and 23b of the discharge tube 23 are connected to the main capacitor and the ground via a strobe circuit, and are discharged by the electric charge stored in the main capacitor. Two conductive metal elastic plates 27 and 28 are connected between the lead terminals 23a and 23b and the strobe circuit. For these conductive metal elastic plates 27 and 28, one thin plate is die-cut, and thereafter, as shown in the figure, the contact surface 27a for the substrate, which is connected to the pattern of the strobe circuit,
28a and lead terminal contact surfaces 27b and 28b that come into contact with the lead terminals 23a and 23b, respectively, and the shape between them is L-shaped or bent into a crank.

One of the conductive metal elastic plates 27 has a bent shape so that the contact surface 27b for the lead terminal can absorb the impact force applied only from the direction perpendicular to the contact surface 27a for the substrate. In addition, the other conductive metal elastic plate 28 has its contact surface 28b for lead terminals capable of absorbing them when an impact force is applied to the contact surface 28a for substrate in parallel, perpendicular and twist directions. It has a simple bent shape.

Each conductive metal elastic plate 27, 28
The claws provided on the board contact surfaces 27a and 28a are inserted into the predetermined openings of the strobe board 26, and then these parts are soldered. After that, when the light emitting unit 20 is mounted on the strobe board 26 so that the locking claws 21e, 21f, 21g provided on the diffusion plate 21 are engaged with the upper ends 26a, 26b and the opening 26c of the strobe board 26, Contact the lead terminal contact surfaces 27b and 28b while pressing the lead terminals 23a and 23b by the elasticity of the lead terminals 23a and 23b from left to right as shown in FIG.

Next, the assembly of the strobe device described above will be briefly described. First, electrical components and conductive metal elastic plates 27, 28 are provided in the through holes of the strobe circuit.
Etc., and solder. In the strobe device described in the related art here, since the work directions for soldering the lead terminals and the electric components to the strobe board are opposite,
While a step of reversing the direction of the printed circuit board was required before these soldering operations, in the present embodiment,
Since the conductive metal elastic plates 27 and 28 and the electric components are soldered to the strobe substrate 26 in the same direction,
The step of reversing the strobe substrate 26 can be omitted, and the cost can be reduced.

Next, the light emitting section 20 is assembled. Reflective umbrella 22
From either of the openings provided on both sides of the discharge tube 23
And the lead terminals 23a and 23b of the discharge tube 23 are exposed from both side surfaces of the reflector 22. The insertion at this time can be easily performed because the lead terminals 23a and 23b have a slightly protruding shape. After that, the trigger electrode plate 24 is pressed from the rear surface while the reflector 22 is pressed against the rear surface side of the diffusion plate 21. This pressing is done by the upper tip 24
a and the lower end portion 24b while pushing and spreading up and down, these are performed by the cutout portions 21a, 21 of the diffusion plate 21.
Lock to b. As a result, the light emitting unit 20 is configured so that
Are integrated in a state of being pressed toward the reflector 22 by the pressing portions 21c and 21d of the diffusion plate 21.

After that, the locking claw 21 above the diffusion plate 21
e and 21f are hooked in the ranges 26a and 26b shown at the upper end of the strobe substrate 26 shown in FIG.
Further, the light emitting unit 20 is incorporated into the strobe board 26 so that the locking claw 21g is fitted into the opening 26c. As a result, the lead terminal contact surfaces 27b and 28b are pressed by the elasticity of the lead terminals 23a and 23b from the left side to the right side in the figure, and these are elastically electrically connected.

The contact surfaces 27b, 28b for the lead terminals
By elastically contacting the lead terminals 23a and 23b with each other, the soldering work can be reduced and the cost can be reduced as compared with the strobe device described in the related art. In the strobe device described in the related art, the direction in which the light emitting portion 10 is incorporated in the strobe substrate 16 is set to only one direction, whereas in the first embodiment, the elastic lead terminal contact surface 27b, Since 28b is formed with a wide contact area, there is an advantage that it can be installed in any direction and can be reliably connected even in rough positioning.

Further, for example, in order to make a reliable connection, the lead terminals 23a and 23b and the lead terminal contact surface 27b,
In the case of soldering with 28 b, even if a force is applied to the strobe substrate 26, the discharge tube 23, etc., the conductive metal elastic plates 27, 28 themselves absorb these forces.
6 and the discharge tube 23 can be safely soldered without damage or damage. Further, even after the assembly is completed, even if the discharge tube 23 and the strobe board 26 contract due to temperature change, these forces are applied to the conductive metal elastic plate 27,
28 is absorbed by the strobe substrate 26 and the discharge tube 23.
The quality can be improved without damaging or damaging the and.

Finally, the projecting piece 24d of the trigger electrode plate 24 shown in FIG. 2 is connected to the secondary electrode of the trigger transformer (not shown) mounted on the strobe board. This completes the assembly of the strobe device.

Next, the second embodiment will be described. Second
The embodiment is an example in which the shape of one conductive metal elastic plate 27 described in the first embodiment is changed. As shown in FIG. 3, one conductive metal elastic plate 30 has a U-shaped loop portion 30 between the board contact surface 30a and the lead terminal contact surface 30b.
c is provided so that the loop portion 30c can absorb the force applied from the discharge tube 23, the strobe substrate 26, and the like even when contraction such as shock, vibration, or torsional stress occurs. The shapes of the conductive metal elastic plates 27, 28, 30 are not limited to the shapes shown in the figures, but the conductive metal elastic plates 27, 28 may be arranged according to the arrangement of the electric components mounted on the strobe board. If the shape of the space 30, 30 is limited in terms of space, the shape may be taken into consideration, and may be formed by bending so as to absorb the impact force, vibration, etc. applied from the discharge tube 23, the strobe substrate 26, and the like.

Further, in the third embodiment, the lead wires 13 and 13b protruding from both ends of the discharge tube 13 described in the prior art.
Is an example in which is changed to a twisted line. As shown in FIG. 4, the discharge tube 4
The twisted wires 40a and 40b protruding from both ends of 0 are one metal wire having a low rigidity, in which thin metal wires are put together. Strands 40a and 40b are used for the discharge tube 40.
The portion between the flash substrate and the strobe substrate is bent in a loop shape in order to absorb external shocks and vibrations.

Although the respective embodiments have been described above,
It goes without saying that the strobe device of the present invention can be applied not only to the strobe device incorporated in the lens-fitted film unit, but also to a strobe device incorporated in a low-cost type camera or the like, or a strobe device having a structure separable from the camera.

[0026]

As described above in detail, in the photographic strobe device of the present invention, a part of the conductive elastic member connected to the circuit pattern provided on the strobe substrate and both ends of the strobe discharge tube are provided. Since the protruding lead terminals are in elastic contact, the elastic member absorbs these forces even if shock or vibration is applied from the light emitting part or strobe board, etc., so the discharge tube, strobe board, etc. are damaged during assembly. Also, it will not be damaged.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts showing a strobe device described in a first embodiment.

FIG. 2 is an exploded perspective view of the light emitting unit shown in FIG.

FIG. 3 is a main part exploded perspective view showing a main part of the strobe device described in the second embodiment.

FIG. 4 is a side view of the discharge tube described in the third embodiment.

FIG. 5 is an exploded perspective view of a main part of the strobe device described in the related art.

[Explanation of symbols]

 10, 20 Light emitting part 12, 22 Reflector 13, 23 Discharge tube 16 26 Strobe substrate 21 Diffusion plate 24 Trigger electrode plate 27, 28, 30 Conductive metal elastic plate

Claims (3)

[Claims] 1. A strobe device for photography comprising a strobe substrate having a strobe circuit formed therein and a light emitting part mounted on the strobe substrate and incorporating a reflector and a discharge tube, wherein both terminals of the strobe discharge tube are stroboscopically connected. A photographic strobe device which is elastically and electrically connected to a substrate. 2. A trigger electrode plate having elasticity for applying a trigger signal to the discharge tube is provided so as to cover from the back surface of the reflector, and the upper and lower ends of the trigger electrode plate and the diffusion plate are connected between them. In a photographic strobe device having a light emitting unit integrally holding a reflector and a discharge tube arranged,
A strobe device for photography, characterized in that a part of a conductive elastic member connected to a strobe circuit formed on a strobe substrate is elastically contacted with lead terminals protruding from both ends of the strobe discharge tube. 3. A photographic strobe device in which a lead terminal protruding from both ends of a strobe discharge tube is electrically connected to a strobe substrate on which a strobe circuit is formed. In the strobe device for photography, the lead terminal is provided with a plurality of thin metal wires. A strobe device for photography, which is a metal wire formed together, wherein the metal wire is bent in a loop shape between the discharge tube and the strobe substrate.