JP2818697B2 - Manufacturing method of photographic strobe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illumination strobe used for photographing, and more particularly to a method for manufacturing a photographic strobe.

[0002]

2. Description of the Related Art 3
A film unit with a lens (product name "Sharun") that incorporates a strobe into the unit body that houses a 5-mm film and has a photographing mechanism such as a photographing lens and a simple shutter. Flash ") is provided. The strobe needs to be manufactured inexpensively, like the unit itself, so that when the user does not have a camera, he / she can easily purchase and take a picture of the film unit with a lens. The strobe includes a printed circuit board on which a strobe circuit is formed, a light emitting unit including a strobe discharge tube and a reflector, and a connection between a lead terminal of the strobe discharge tube and the printed circuit board is fixed to a lead wire or a printed circuit board. This is done via a rigid electrical contact.

[0003]

However, in the former manufacturing method described above, the leading end cannot be positioned because the lead wire is flexible. Therefore, when the lead wire is soldered to a lead terminal of a strobe discharge tube or a printed board. However, there was a problem that automation was not possible. Further, in the latter manufacturing method, the lead terminal of the strobe discharge tube is directly soldered to the electric contact, so that this can be automated. However, the cost is higher because the electric contact is more expensive than the lead wire. There was a problem of getting high. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and eliminates the lead wires and electrical contacts connecting a lead terminal of a strobe discharge tube and a printed circuit board, and can automate the soldering of these to reduce costs. It is intended to provide a method of manufacturing a photographic strobe which can achieve the following.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a method for manufacturing a photographic strobe comprising a printed circuit board on which a strobe circuit is formed, a strobe discharge tube and a reflector, and a strobe discharge tube having rigid lead terminals at both ends. After inserting a part of the side plate bent to both sides of the curved reflecting surface of the reflector umbrella and opening it to form a light emitting part, bend each lead terminal of the strobe discharge tube and tip Are positioned on the printed circuit board, and after that, the light emitting section is fixed to the printed circuit board, and the ends of the lead terminals are connected to the circuit pattern of the printed circuit board.

[0005]

FIG. 3 shows the appearance of a lens-fitted film unit incorporating a strobe manufactured according to the present invention. The lens-fitted film unit 2 includes a unit main body 3 for accommodating a film, and an exterior body (hereinafter, simply referred to as a "paper box") 4 covering the unit main body 3. The unit main body 3 is provided with a photographing lens 5, a release button 6, a counter display window 7, a finder objective opening 8, a strobe light emitting section 9, a charging knob 10, and a winding knob 11.
The paper box 4 is provided with openings for exposing the photographing lens 5, release button 6, counter display window 7, finder objective opening 8, strobe light emitting section 9, charging knob 10, and winding knob 11. In the film unit 2 with a lens, the photographing can be performed while the paper box 4 is covered. In the film unit 2 with a lens, the charging knob 10 is pressed during flash photography to charge a capacitor described later. When the release button 6 is pressed after the charging of the capacitor is completed, the flash discharge tube built in the flash light emitting unit 9 emits light.

Referring to FIG. 1, which shows a main part of a strobe manufactured according to the present invention, the strobe light emitting section 9 comprises a strobe discharge tube 20, a reflector 21 and a diffusion plate 22. The reflector 21 has a curved reflecting surface and side plates bent on both sides thereof, and a discharge tube insertion hole 23 is formed by cutting out a part of the side plate. The strobe discharge tube 20 is inserted into the discharge tube insertion hole 23. Lead terminals 24 and 25 extending from both electrodes are formed at both ends of the strobe discharge tube 20, and these lead terminals 24 and 25 are bent at right angles as shown in the figure. In this embodiment, the lead terminals 24, 2
Although 5 is bent at a right angle, the bending may be oblique.

[0007] Hooks 26 are formed at both ends of the reflector 21 along the longitudinal direction. The hooks 26 are respectively fitted into a pair of openings 27 and 28 formed in the diffusion plate 22 to prevent the reflector 21 attached to the diffusion plate 22 from coming off. A pair of V-shaped support pieces 29 and 30 are formed on the diffusion plate 22 at both ends of the strobe discharge tube 20. The support pieces 29 and 30 are in contact with both ends of the strobe discharge tube 20 incorporated in the reflector 21 and press and fix the strobe discharge tube 20 against the inner surface of the reflector 21. For this reason, the tips of the lead terminals 24 and 25 can be positioned with respect to the strobe light emitting section 9.

The diffusion plate 22 has a pair of locking claws 31.
Are formed, and the nail 31 nails the strobe light emitting unit 9 to the printed circuit board 32. On the printed circuit board 32, components such as a capacitor 35, a transformer 36, and a contact piece 37 that contacts an electrode of a battery (not shown) are mounted. The printed circuit board 32 has a plurality of small through holes 38 and a pair of large openings 39 and 40. The projections (not shown) formed on the unit main body 3 are fitted into the openings 39 and 40, and the printed circuit board 32 is fixed to the unit main body 3. The lead terminals 24 and 25 and the lead terminals of each component are inserted into each through-hole 38, and the front end of the printed board 32 penetrating to the back side is connected to the printed board 32 as shown in FIG.
Are soldered to the circuit patterns 41 formed on the substrate.

The method of connecting the strobe discharge tube and the printed circuit board in the strobe constructed as above will be described with reference to FIGS.
This will be described with reference to FIG. Open the hook 26 to the openings 27 and 28
And the reflector 21 is attached to the diffusion plate 2 as shown in FIG.
Attach to 2. In this state, the strobe discharge tube 20
Is inserted through the discharge tube insertion hole 23, and this is assembled into the reflector 21. The strobe discharge tube 20 is inserted in sliding contact with the tips of the support pieces 29 and 30. Since the contact surface is made of glass and plastic, this insertion can be smoothly performed. When the assembly of the strobe light emitting section 9 is completed, the strobe discharge tube 20 is pressed and fixed to the inner surface side of the reflector 21 by the supporting pieces 29 and 30 as shown in FIG.
Thereafter, the lead terminals 24 and 25 are bent as shown in FIG. 6, and the strobe light emitting section 9 is completed.

The strobe light emitting section 9 is connected to a printed circuit board 32.
When this is assembled from the back side of the printed circuit board 32 while positioning with respect to the printed circuit board 32, the tips of the lead terminals 24 and 25 are inserted into the through holes 38, and
2 protrudes to the surface side. Also, the nail 31 is a printed circuit board 3
2 to fix the flash unit 9 to the printed circuit board 32. At this time, components such as the capacitor 35, the transformer 36, and the contact piece 37 are also mounted on the printed circuit board 32. Thereafter, when the surface side of the printed circuit board 32 from which the lead terminals 24 and 25 protrude is immersed in a solder bath, the lead terminals 24 and 25 are soldered to the circuit pattern 41 as shown in FIG.

As described above, in this embodiment, the support pieces 29 and 30 in which the strobe discharge tube 20 is formed on the diffusion plate 22 are provided.
8, the support pieces 46 and 47 are formed on the reflector 45 as shown in FIG. 8, and the elasticity of the support pieces 46 and 47 is used to strobe the discharge tube 48. It may be pressed and fixed to the reflecting umbrella 45. In the above embodiment, the lead terminals 24 and 25 are inserted into the through holes 38 and connected to the printed circuit board 32 by immersion soldering.
This connection may be made by reflow soldering. In addition,
When the lead terminals 24 and 25 are bent obliquely, the latter is performed by reflow soldering. In the above embodiment, the strobe manufactured by the present invention is incorporated in the film unit with a lens. However, it goes without saying that the present invention can be used for a general camera with a strobe.

[0012]

As described above in detail, according to the present invention, in a method of manufacturing a photographic strobe comprising a printed circuit board on which a strobe circuit is formed, a strobe discharge tube and a reflector, rigid leads are provided at both ends. After assembling the light emitting part by inserting a strobe discharge tube having a terminal from an opening formed by cutting out a part of a side plate bent on both sides of a curved reflecting surface of the reflector, each of the strobe discharge tubes The lead terminal was bent to position the tip on the printed circuit board, and then the light emitting portion was fixed to the printed circuit board and the tip of the lead terminal was connected to the circuit pattern on the printed circuit board. Since it is possible to omit lead wires and electrical connection pieces for connecting to a printed circuit board, it is possible to reduce the manufacturing cost. Further, since the lead terminals have rigidity, when the light emitting section is assembled to the printed circuit board, its tip is positioned with respect to the printed circuit board, so that soldering can be automated.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a main part of a photographic strobe manufactured by a manufacturing method of the present invention.

FIG. 2 is a perspective view showing a main part of a photographic strobe manufactured by the manufacturing method of the present invention.

FIG. 3 is a perspective view showing the appearance of a film unit with a lens incorporating a photographic strobe manufactured by the manufacturing method of the present invention.

FIG. 4 is an explanatory view showing a state where a reflector is attached to a diffusion plate.

FIG. 5 is an explanatory view showing a strobe light emitting unit in a state where a strobe discharge tube is incorporated in a reflector;

FIG. 6 is an explanatory view showing a strobe light emitting portion in a state where each lead terminal of the strobe discharge tube is bent.

FIG. 7: Assembling the strobe light emitting unit to the printed circuit board,
It is explanatory drawing which shows the state which soldered the lead terminal.

FIG. 8 is an exploded perspective view of another strobe light emitting portion used for a photographic strobe manufactured by the manufacturing method of the present invention.

[Explanation of symbols]

 2 Film unit with lens 9 Strobe light emitting unit 20 Strobe discharge tube 21 Reflector 22 Diffusion plate 24, 25 Lead terminal 32 Printed circuit board

Claims (1)

(57) [Claims] A printed circuit board according to claim 1 was formed a strobe circuit, the flash discharge tube, in the manufacturing method of a photographic strobe comprising a reflector, a flash discharge tube having a rigid lead terminals at both ends, anti
Side plates bent on both sides of the curved reflective surface of the parasol
After assembling the light emitting unit by inserting it through the opening formed by cutting out a part of the light emitting unit, bending each lead terminal of the strobe discharge tube and positioning the tip to the printed circuit board, and then the light emitting unit is mounted on the printed circuit board A method for manufacturing a photographic strobe, comprising fixing a lead terminal to a circuit pattern on a printed circuit board and soldering the connection part.