JPH07191385A - Strobe light emitting part - Google Patents

Abstract

PURPOSE:To provide a low-priced strobe light emitting part easy in assembly, high in production efficiency and excellent in recycling property. CONSTITUTION:Holes 24a and 25a constituted of plural tongue pieces are formed at the tip parts of a pair of electric armatures 24 and 25 having elasticity. At the time of assembling, the electric armature 24 is turned at a bent part 24b and retreated from the insertion path of a discharge tube 12 in advance. The discharge tube 12 is allowed to pass through the through holes 18a and 18b of a reflector 13 so as to insert an electrode 22 in the hole 25a of the electric armature 25. The respective tongue pieces in the hole 24a are bent by the tip part of the electrode 22, and the electrode 22 is fitted in the hole 25a. By pressing the electric armature 24 to an electrode 21 side after it is turned so that the hole 24a may be faced to the electrode 21, the electrode 21 is fitted in the hole 24a. Since a loop state bent part is formed at one part of the electric armature, impact force from the outside is softened and the damage of the discharge tube is prevented. The elongation and the contraction of the electric armature caused by the heat of the discharge tube is also absorbed by the bent part and the discharge tube and the supporting member are prevented from being adversely influenced.

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 of a strobe device which emits auxiliary light for photographing.

[0002]

2. Description of the Related Art An elongated glass discharge tube filled with Xe gas is used in a light emitting portion of a strobe device. Rod-shaped electrodes are provided at both ends of the discharge tube, and these electrodes are connected to a printed circuit board via soldered lead wires. Also, there is one in which the electrode of the discharge tube is directly fixed to the conductive portion of the printed circuit board by soldering (Japanese Utility Model Laid-Open No. 61-148040).

[0003]

However, the soldering work involves the steps of melting the solder, raising the temperature of the parts to be soldered, and waiting until the solder hardens.
It takes time and production efficiency is poor. In addition, equipment for soldering work is required, and manufacturing cost increases due to an increase in consumables called solder. In addition, when recycling the stroboscopic light emission part, this light emission test is performed and the discharge tube whose light emission performance has deteriorated is replaced. In order to replace the discharge tube, first, the solder is melted and the lead wire is removed from the electrode of the discharge tube. However, since the melted solder is discharged as dust in this step, the amount of waste increases.
Along with this, factory cleaning management is required. Also,
In the case where the electrode of the discharge tube is directly fixed to the conductive portion of the printed board as described above, the discharge tube may be damaged when a strong impact is applied from the outside.

The present invention has been made in consideration of the above problems of the prior art, and an object of the present invention is to provide a low-cost stroboscopic light emitting unit which is easy to assemble, has high production efficiency, and is suitable for recycling. Further, in addition to these characteristics, it is another object of the present invention to provide a stroboscopic light emitting unit in which the discharge tube is not damaged even when a strong impact is applied from the outside.

[0005]

In order to achieve the above object, the stroboscopic light emitting section according to claim 1 has stroboscopic light emitting sections in which rod-shaped electrodes are fixed to both ends, and a predetermined voltage is applied to the rod-shaped electrodes. And an electric contact piece for applying the electric contact piece, and an opening portion formed in the electric contact piece, into which the rod-shaped electrode is fitted to connect the electric electrode with the rod-shaped electrode.
The rod-shaped electrode comprises a plurality of tongues that are bent by the insertion of the rod-shaped electrode, and the tip of each tongue is brought into close contact with the peripheral surface of the rod-shaped electrode.

According to another aspect of the present invention, there is provided a stroboscopic light emitting portion, in which rod-shaped electrodes are fixed to both ends, an electric contact piece for applying a predetermined voltage to the rod-shaped electrode, and the electric contact piece. And an opening into which the rod-shaped electrode is fitted to connect the rod-shaped electrode and the electrical contact piece, and the opening is bent by the tip of the rod-shaped electrode by inserting the rod-shaped electrode. Composed of tongues,
The tip of each tongue is brought into close contact with the peripheral surface of the rod-shaped electrode, and a loop-shaped bent portion is provided in a part of the electrical contact piece to reduce the impact force from the outside and It is designed to prevent damage.

[0007]

The electric contact piece for applying a predetermined voltage to the electrode of the discharge tube is formed with an opening composed of a plurality of tongue pieces. When the electrode of the discharge tube is inserted into this opening, the tip of the electrode causes each tongue to bend, and the tip of each tongue is brought into close contact with the peripheral surface of the electrode. Thus, once the electrode is inserted into the opening, the elasticity of each tongue prevents the electrode from accidentally coming off the opening. When replacing the discharge tube, pull the discharge tube away from the electrical contact,
The electrode of the discharge tube can be easily pulled out from the opening of the electric contact piece. Then, the electrode of the new discharge tube is inserted into the opening of the electric contact piece, and the replacement of the discharge tube is completed. Also, since a loop-shaped bent portion is provided in a part of the electric contact piece,
The impact force from the outside is mitigated and damage to the discharge tube is prevented. Further, by rotating the electric contact piece from the bent portion, the electric contact piece can be retracted from the insertion path of the discharge tube, and the strobe light emitting portion can be assembled more easily.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1 and FIG.
0 is a discharge tube 12, an aluminum reflector 13 and a reflector 1
Although not shown in the figure, a transparent plastic diffuser plate is adhered to the front surface of the support frame 14 made of resin in which 3 is incorporated in the central portion. The reflector 13 is made by bending a thin aluminum plate into a U shape and further bending an end portion thereof inward, and is composed of a U-shaped concave surface portion 15 and a pair of side surface portions 16a and 16b. . Then, this inner surface becomes a reflecting surface that reflects the strobe light. Through holes 18a, 18b having a diameter slightly larger than the outer diameter of the discharge tube 12 are formed in the side surface portions 16a, 16b so that the discharge tube 12 can be easily inserted.

The electrodes 21, 22 of the discharge tube 12 are electric contact pieces 24, 25 made of an electrically conductive metal having elasticity,
The star-shaped holes 24a and 25a formed therein are inserted and connected. These holes 24a and 25a are shown in FIG.
As shown in (4), the tongue pieces 26, 27, 28, and 29 are formed, and the diameter of the substantially circular hole formed by these tip portions is slightly smaller than the shaft diameter of the electrodes 21 and 22. As a result, the electrodes 21 and 22 are connected to the holes 24a and 2
5a, as shown in FIG.
The tips of the electrodes are bent by the tips of the electrodes 21 and 22, and the electrodes 21 and 22 are fitted into the holes 24a and 25a. At this time, the elasticity of the electrical contact pieces 24, 25 causes the electrodes 21, 22
The tips of the tongue pieces 26 to 29 are in close contact with each other, and the electrodes 21, 22
And the electric contact pieces 24, 25 are reliably connected.

As shown in FIGS. 1 and 2, the electric contact pieces 24, 25 are insert-molded in the support frame 14, and the tip end portion having the holes 24a, 25a and the support frame 14 are formed.
Between and, there are provided bent portions 24b and 25b that are bent in a loop shape, for example, a U shape. This bent part 2
The impact force from the outside is mitigated by 4b and 25b, and the damage of the discharge tube 12 is prevented. Further, even if the electric contact pieces 24 and 25 expand and contract due to the heat generation of the discharge tube 12, the expansion and contraction are absorbed by the bent portions 24b and 25b, so that the discharge tube 12 and the support frame 14 are prevented from being broken. You can Furthermore, when assembling the strobe light emitting unit 10,
Although it is necessary to retract the tip ends of the electric contact pieces 24, 25 from the insertion path of the discharge tube 12 in advance, the bent portions 24b, 25
By rotating the electric contact pieces 24, 25 so as to extend b, or by bending the bent portions 24b, 25b so as to be further folded, the tip end portions of the electric contact pieces 24, 25 can be easily moved. it can.

The other ends 24c, 25 of the electrical contact pieces 24, 25
As shown in FIG. 1 and FIG.
It is provided close to one end of 0 (the left end of the drawing),
As shown in FIGS. 1 and 5, the shape thereof is bent toward the front side of the stroboscopic light emitting unit 10 and has a tip end portion formed in a wedge shape. The other ends 24c and 25c are provided near the guide pins 14a and 14b integrally formed with the support frame 14. When the guide pins 14a and 14b are inserted into a printed circuit board (not shown) on which a strobe circuit is mounted, the other ends 24c and 25c are connected to the trigger circuit of the strobe circuit.

On both sides of the support frame 14, pressing members 31 and 32 for pressing the discharge tube 12 from the front to position the same are formed integrally with the support frame 14. This holding member 3
2, the surface of the discharge tube 12 that contacts the discharge tube 12 is formed into a shape along the corner of the tube portion of the discharge tube 12, and the axis of the discharge tube 12 is set when the discharge tube 12 is set. The position in the direction is also regulated. Also, the pressing member 3
A pair of angular protrusions are provided in the vicinity of the inside of the discharge tubes 12 and 32.
Positioning members 33 and 34 for vertically positioning in FIG. 1 and FIG. 2 are formed integrally with the support frame 14 so as to sandwich the peripheral surface. In order to avoid complication of the drawing, only the angular protrusions 34a and 34b of the positioning member 34 are shown in FIG. The hole 14c shown in FIGS. 1 and 2 is a guide hole for positioning the support frame 14 on the base of the camera body.

The stroboscopic light emitting unit 10 thus configured
For assembling, the electric contact piece 24 is rotated in the clockwise direction in FIG. 1 by extending the bent portion 24b in advance, and the tip of the electric contact piece 24 is retracted from the insertion path of the discharge tube 12. Next, the reflector 13 is dropped into the central portion of the support frame 14 so as to contact the back portion 35 of the support frame 14. After that, the discharge tube 12 is inserted into the through holes 18a and 18b of the reflector 13, and the insertion operation is stopped when the corner portion of the tube portion of the discharge tube 12 contacts the inner wall surface of the pressing member 31. At this time,
The tip of the electrode 22 of the discharge tube 12 is inserted into the hole 25a of the electrical contact piece 25 while bending the tongue pieces 26 to 29. At this time, the electric contact piece 25 is previously regulated by a jig so as not to move in the insertion direction of the discharge tube 12, so that the inconvenience such as bending due to the insertion operation of the electrode 22 does not occur.

Thereafter, the electrical contact piece 24 retracted from the insertion path of the discharge tube 12 is rotated to set the hole 24a at a position facing the tip of the electrode 21. Then, the electric contact piece 24 is pressed and moved toward the discharge tube 12. by this,
Each of the tongues forming the hole 24a is bent by the tip of the electrode 21, and the electrode 21 is fitted into the hole 24a. After this,
A diffusing plate is attached to the support frame 14 so as to cover the reflector 13, and the stroboscopic light emitting unit is completed.

When the assembly of the stroboscopic light emitting portion 10 is completed in this way, the front and rear directions of the discharge tube 12 are positioned by being restricted by the pressing members 31, 32 and the inner wall surface of the reflector 13.
The positioning members 33 and 34 position the discharge tube 12 in the vertical direction. Further, the pressing member 32 restricts the movement of the discharge tube 12 to the right, and the electrode 2
1, 22 are fitted into the holes 24a, 25a of the electric contact pieces 24, 25, and the discharge tube 12 is positioned in the left-right direction.
As a result, the discharge tube 12 is always set at a fixed position with respect to the reflector 13.

When recycling the stroboscopic light emitting part,
Perform a light-emission test on the flash unit and replace the discharge tube that has deteriorated light-emission performance. When replacing this discharge tube,
The discharge tube can be easily removed by reversing the assembly procedure described above. When replacing this discharge tube,
The elasticity of the tongue is not deteriorated after a few replacements, and there is no inconvenience that the electrode and the electrical contact piece cause a contact failure.

Further, since the assembling process and the recycling process of the stroboscopic light emitting unit of the present invention are extremely simple processes,
It is extremely easy to automate these steps by an industrial robot or the like. Although the shape of the hole of the electric contact piece is a star shape, the present invention is not limited to this, and for example, the shape of the hole is made rectangular and a plurality of notches are provided in the radial direction at the edge of the hole. May be. Further, although the loop shape of the bent portion is U-shaped, the present invention is not limited to this and may be S-shaped, for example.

[0018]

As described above in detail, according to the stroboscopic light-emitting portion of the present invention, the electrical contact piece is formed with the opening formed of a plurality of tongue pieces, and the electrode of the discharge tube is inserted therein. By doing so, the assembling and dismounting of the discharge tube becomes extremely easy, and these can be performed in a short time. Also, since soldering work is unnecessary in the assembly process,
There is no need for soldering equipment that involves the risk of fire or burns, consumable solder, or soldering iron maintenance, and you can safely and cleanly assemble the strobe light-emitting part and replace the discharge tube during recycling. Manufacturing costs can also be reduced. Further, since there is no generation of flux, the flux does not adhere to the light emitting part and is not contaminated, and the equipment for absorbing the flux becomes unnecessary. In addition, since no solder residue is generated during recycling, the solder residue is prevented from becoming dust and contaminating the working environment.

Further, since the electric contact piece is provided with the loop-shaped bent portion, it is possible to alleviate the impact force from the outside and prevent the discharge tube from being damaged. By rotating the electric contact piece from the bent portion, the electric contact piece can be easily retracted from the insertion path of the discharge tube, and the stroboscopic light emitting portion can be assembled more efficiently.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external appearance of a stroboscopic light emitting unit from which a diffusion plate is removed.

FIG. 2 is a front view of a strobe light emitting unit.

FIG. 3 is a side view of a strobe light emitting portion showing a relationship between a tongue piece of an electric contact piece and an electrode of a discharge tube.

FIG. 4 is a partial cross-sectional view showing a state in which a tongue piece of an electric contact piece is bent by an electrode of a discharge tube from above a strobe light emitting portion.

5 is a sectional view taken along line VV of FIG.

[Explanation of symbols]

 10 Stroboscopic light emission part 12 Discharge tube 13 Reflector 14 Support frame 21,22 Electrode 24,25 Electrical contact piece 24a, 25a Hole 24b, 25b Bent part 26,27,28,29 Tongue piece

Claims (2)

[Claims] 1. A strobe light-emitting portion having rod-shaped electrodes fixed to both ends thereof, an electric contact piece for applying a predetermined voltage to the rod-shaped electrode, and an electric contact piece formed on the electric contact piece and electrically connected to the rod-shaped electrode. An opening into which a rod-shaped electrode is fitted to connect the rod-shaped electrode, and the opening is composed of a plurality of tongue pieces that are bent by the tip of the rod-shaped electrode when the rod-shaped electrode is inserted. A stroboscopic light emitting part characterized in that the tip end of the piece is brought into close contact with the peripheral surface of the rod-shaped electrode. 2. A stroboscopic light emitting portion having rod-shaped electrodes fixed to both ends thereof, an electric contact piece for applying a predetermined voltage to the rod-shaped electrode, and an electric contact piece formed on the electric contact piece and electrically connected to the rod-shaped electrode. An opening into which a rod-shaped electrode is fitted to connect the rod-shaped electrode, and the opening is composed of a plurality of tongue pieces that are bent by the tip of the rod-shaped electrode when the rod-shaped electrode is inserted. The tip of the piece is in close contact with the peripheral surface of the rod-shaped electrode, and a part of the electric contact piece is provided with a loop-shaped bent portion, which absorbs the impact force from the outside and prevents the discharge tube from being damaged. A strobe light emitting section that is characterized by preventing.