JP3317596B2 - Structure of the flash unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting portion structure of a strobe device for illuminating a subject during photographing.

[0002]

2. Description of the Related Art A film unit with a lens has been manufactured and sold by the present applicant so that photographing can be easily enjoyed at low cost. A film unit with a lens is a unit that incorporates a photographic mechanism, such as a photographic lens and shutter device, with a built-in photographic film in advance. Because of the simplicity of putting it in a store, it is widely used in general.

Some of such a film unit with a lens are provided with a strobe device such as “Photo Run Flash” (trade name). The strobe device used for this is a normal strobe device. The structure is simplified and the cost is reduced as compared with the device. As shown in FIG. 4, a conventional strobe device includes a strobe substrate 11 on which a control circuit for charging or discharging is printed, and a light emitting unit 12 for emitting strobe light. The light emitting section 12 basically includes a strobe discharge tube 13 that emits light in response to a trigger signal, and a reflector 14 that reflects light projected from the strobe discharge tube 13 forward.
And a diffusion plate 15 for diffusing light emitted forward. A trigger electrode plate 16 for applying a trigger signal is attached to the reflector 14.

When assembling this strobe device, first, a strobe discharge tube 13 is inserted into a reflector 14 to which a trigger electrode plate 16 is attached, and then the reflector 14 is fitted into a diffusion plate 15. And the strobe discharge tube 13
The lead terminals 13a and 13b protruding from both ends are bent at a right angle, and the respective ends are inserted into the through holes 11a and 11b of the strobe board 11 and soldered. One end of the trigger electrode plate 16 is connected to the secondary electrode of the trigger transformer.

[0005]

Such a strobe device is mass-produced by automatic assembly in order to reduce the cost. However, in the structure in which the rod-shaped strobe discharge tube 13 is penetrated through two openings formed on both side surfaces of the reflecting umbrella 14 as in the above-described strobe device,
The direction of the reflector 14 must be aligned, the center of the opening of the reflector 14 must be aligned with the axial direction of the strobe discharge tube 13, and then the strobe discharge tube 13 must be slid and inserted. Moreover, since the lead terminals 13a and 13b are provided at both ends of the strobe discharge tube 13 in the same direction as the tube insertion direction, a high degree of accuracy is required for an automatic assembling machine, and the suitability for assembly is reduced. Was causing it.

The present invention has been made in consideration of the above circumstances, and has as its object to provide a structure of a strobe light emitting section with improved suitability for assembly.

[0007]

In order to achieve the above-mentioned object, the present invention provides a strobe light-emitting section in which a reflector is provided with a pair of supporting portions for supporting both ends of a strobe discharge tube from the front side, and a pair of supporting portions. An opening that is open to the back side is formed between the support portions, and a strobe discharge tube is incorporated into the reflector from the back side through this opening portion so that each end of the strobe discharge tube is held by the support portion. At the edge of the trigger electrode plate placed on the back of the discharge tube , facing the outer peripheral surface of the reflector
An engaging claw that is formed to protrude is attached to the outer peripheral surface of the reflector.
By engaging a provided with engagement grooves, reflecting the trigger electrode plate
In addition to being fixed to the umbrella, a strobe discharge tube is sandwiched between the reflector and the trigger electrode plate. Further, it is preferable that the supporting portion for supporting the strobe discharge tube bends a part of the back surface of the reflector so as to follow the shape of the wall surface of the strobe discharge tube to form a pair of support pieces. further,
The trigger electrode plate is preferably formed such that a portion that comes into contact with the strobe discharge tube has a concave curved surface that follows the wall shape of the strobe discharge tube.

[0008]

FIG. 1 shows the structure of a strobe device using the present invention. The strobe device 20 includes a strobe substrate 21 on which a charge and discharge control circuit is printed and a light emitting unit 22.
The light emitting section 22 is a rod-shaped strobe discharge tube 2
3, reflector 24, trigger electrode plate 25, and diffuser plate 26
It is composed of The strobe discharge tube 23 has xenon gas sealed in the tube and emits light in response to a trigger signal. Lead terminals 2 from both ends of the strobe discharge tube 23
3a and 23b are protruding, respectively,
One of the through holes 21a and 21b is inserted and soldered.

The reflecting umbrella 24 is formed of a rectangular tube having a reflecting surface formed on the inner wall surface and diverging toward the front. The reflector 24 abuts the light emitting surface of the strobe discharge tube 23 against the opening on the back side, and reflects the light projected from the strobe discharge tube 23 toward the front. As shown in FIG.
In the opening on the back side of the strobe discharge tube 23, support pieces 31a and 31b curved in accordance with the wall shape of the strobe discharge tube 23 are provided at an edge portion orthogonal to the tube axis of the strobe discharge tube 23. A pair of side walls 32a, 32b protruding rearward are provided on both side edges parallel to the axis. Sidewall 32
a and 32b are strobe discharge tubes 23 at their respective tips.
Is formed so that the opening width of the insertion port 33 is wider than the thickness of the strobe discharge tube 23.

The trigger electrode plate 25 has an inner wall surface having a light reflecting action, and is placed on the back of the reflector 24 from behind the strobe discharge tube 23 to give a trigger signal to the strobe discharge tube 23. At a central portion of the trigger electrode plate 25 which is in contact with the strobe discharge tube 23, a holding portion 35 curved in accordance with the wall shape of the strobe discharge tube 23 is provided. Openings 36a, 3 for projecting a pair of side walls 32a, 32b provided on the reflection umbrella 24 are provided on both sides of the holding portion 35.
6b has been established. An engagement claw 25a is provided at an edge of the trigger electrode plate 25.
When 5a engages with the engaging groove 24a of the reflector 24, the trigger electrode plate 25 is fixed in a state where the inner wall of the pressing portion 35 is pressed against the wall surface of the strobe discharge tube 23. Diffusion plate 2
6 is a direct light from the strobe discharge tube 23 and a reflector 24
The light directed forward is diffused into a predetermined photographing range.

In the assembling step of the strobe device 20, first, as shown in FIG. 3A, the reflector 24 is placed with its back face up. Then, the rod-shaped strobe discharge tube 23 is inserted from an insertion port 33 formed on the back surface of the reflector 24, and is mounted on the support pieces 31a and 31b. At this time, since the opening width of the insertion port 33 is formed to be wider than the thickness of the strobe discharge tube 23,
Can be easily inserted without any hindrance. Also,
Since the support pieces 31a and 31b are curved following the wall shape of the strobe discharge tube 23, the strobe discharge tube 23 is stably mounted on the support pieces 31a and 31b. further,
As shown in FIG. 3B, both side surfaces of the strobe discharge tube 23 are surrounded by a pair of side walls 32a, 32b protruding rearward, so that they are once mounted on the support pieces 31a, 31b. The strobe discharge tube 23 does not fall off the reflector 24.

When the strobe discharge tube 23 is placed on the reflector 24, as shown in FIG. 3B, the trigger electrode plate 2 is placed from behind the strobe discharge tube 23 to the back of the reflector 24.
5 is covered. Then, the engagement claws 25 a of the trigger electrode plate 25 are engaged with the engagement grooves 24 a of the reflector 24. As a result, as shown in FIG.
Is sandwiched and fixed between the reflector 24 and the trigger electrode plate 25. At this time, the pressing portion 3 of the trigger electrode plate 25
5 is curved following the wall shape of the strobe discharge tube 23, so that the inner wall of the holding portion 35 is
And presses the entire strobe discharge tube 23 with a uniform force.

Strobe discharge tube 23 and trigger electrode plate 25
Is attached to the diffusion plate 26. Then, lead terminals 23a and 23b protruding from both ends of the strobe discharge tube 23 are bent at a right angle,
Each end is a through hole 21 of a strobe substrate 21
a, 21b and soldered. One end of the trigger electrode plate 25 is connected to a secondary electrode of the trigger transformer.

In the above-described embodiment, an example has been described in which the lead terminals protruding from both ends of the strobe discharge tube are bent after the strobe discharge tube is sandwiched between the reflector and the trigger electrode plate. You may make it bend in the same direction beforehand. Since the strobe discharge tube is inserted into the reflector in a direction perpendicular to the axial direction, the lead terminals provided in the axial direction do not hinder the insertion. Also, after the strobe discharge tube is placed on the reflector, the end of the lead terminal naturally faces the lower side, that is, the front side of the reflector, due to the weight of the bent lead terminal,
The number of processing steps of the strobe device can be reduced.

Further, in the above-described embodiment, a description has been given of an example in which a pair of support pieces are provided on the back surface of the reflector and the strobe discharge tubes are mounted on the support pieces. May be formed in accordance with the shape of the tube wall, and a strobe discharge tube may be inserted and held in the cut. According to this embodiment, the back side of the reflector can be left open, so that the processing is simpler.

[0016]

As described above, according to the present invention, according to the present invention, placing the strobe discharge tube on the rear side of an opening of the reflector, overmolded trigger electrode plate from the back of the flash discharge tube Rutotomoni, Formed on the edge of the trigger electrode plate
The engaging claw into the engaging groove formed on the outer peripheral surface of the reflector
Is allowed Runode can the coating direction of the loading direction and the trigger electrode plate of the flash discharge tube to simplify the same, and the assembly operation. Also, since the trigger electrode plate is engaged with the reflector with a part of its inner wall in contact with the strobe discharge tube, it is possible to apply a trigger signal to the strobe discharge tube without increasing the number of components. As well as
The strobe discharge tube can be fixed between the trigger electrode plate and the reflector.

Further, by providing a support portion curved in accordance with the tube wall shape of the strobe discharge tube at the edge of the reflector to which the strobe discharge tube contacts, the strobe discharge tube is stably mounted on the reflector. can do. This makes it possible to easily assemble the strobe device, so that the workability thereof can be further improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a strobe device of the present invention.

FIG. 2 is a top view of the reflector shown in FIG. 1;

FIG. 3 is an explanatory view showing an assembling procedure of the strobe device of the present invention.

FIG. 4 is a configuration diagram of a conventional flash device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 Strobe device 21 Strobe substrate 23 Strobe discharge tube 24 Reflector 25 Trigger electrode plate 26 Diffusion plate 31a, 31b Supporting piece 32a, 32b Side wall 33 Insertion opening 35 Pressing portion 36a, 36b Opening

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G03B 15/04-15/05 G03C 3/00 575

Claims (3)

(57) [Claims] 1. A strobe discharge tube having a rod shape, a cylindrical reflector having a reflection surface formed on an inner surface for reflecting light emitted from the strobe discharge tube forward, and a trigger signal for light emission to the strobe discharge tube. In the strobe light emitting portion comprising a trigger electrode plate to be provided, a pair of support portions for supporting both end portions of the strobe discharge tube from the front side are formed on the reflector and open to the back side between these support portions. An opening is formed, and a strobe discharge tube is incorporated into the reflector from the back side through this opening to hold each end of the strobe discharge tube with the support portion,
Edge of trigger electrode plate over the back of this strobe discharge tube
The edge is formed to project toward the outer peripheral surface of the reflector
The engaging claw is engaged with the engaging groove provided on the outer peripheral surface of the reflector.
Then, while fixing the trigger electrode plate to the reflector,
A structure of a strobe light emitting unit, wherein a strobe discharge tube is sandwiched between a reflector and a trigger electrode plate. 2. The pair of support portions according to claim 1, wherein the pair of support portions are a pair of support pieces in which a part of the back surface of the reflector is curved forward according to the wall shape of the strobe discharge tube. Structure of strobe light emitting section. 3. The trigger electrode plate according to claim 1, wherein the trigger electrode plate has a concave curved surface following a wall shape of the strobe discharge tube at a portion in contact with the strobe discharge tube. Structure of strobe light emitting section.