JP2004006073A - Light source equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source equipment excellent in workability for assembling or mounting, capable of suppressing danger of causing improper work as much as possible when assembling, and possible to be conveniently to make a device thin. <P>SOLUTION: This light source equipment is provided with a printed circuit board 1 on which a prescribed wiring is patterned, a light source lamp 2 equipped with a tube body 21 stored in an opening hole 11 bored and opened in the printed circuit board 1 with the body entered in it and a terminal 22 protruding from both ends of the tube body 21 soldered to a pad 1A on the printed circuit board 1, a reflector 3 fixed to the printed circuit board 1 with the light source lamp 2 surrounded by it, and a cover plate 4 mounted on the surface opposite to the mounting surface of the reflector 3 on the printed circuit board 1 to cover the tube body 21 of the light source lamp 2 in a condition where it is brought into contact with the tube body. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a light source device in which a light source and a reflecting plate that reflects light from the light source are fixed on a printed circuit board.
[0002]
[Prior art]
As is well known, various cameras having a built-in flash device have been developed and used. In addition, there is known a flash device including a light source, a reflection plate provided so as to surround the light source, and a holder for fixing the reflection plate.
[0003]
For example, as shown in FIG. 8, in the case of a flash device using a xenon (Xe) lamp 101 as a light source, a holder 103 is mounted on a printed circuit board 102, and a connector 104 and a trigger coil are provided in the vicinity of the holder 103. 105 is mounted, and a connector 104 and a pin-shaped terminal (hereinafter referred to as a pin terminal) 101B protruding from both ends of the xenon tube main body 101A are connected by a wire 108, while a reflector 106 is attached to the holder 103, Then, the thing of the structure which electrically connected this reflector 106 and the coil 105 via the plate board 107 is known.
[0004]
[Problems to be solved by the invention]
By the way, in recent years, in the case of cameras, mobile phones, and the like, in view of portability and the like, there is an increasing tendency to reduce the thickness as well as the weight and size. However, in the flash device having such a configuration, as described above, the holder portion is bulky, which is an obstacle to reduction in thickness.
[0005]
In addition, when assembling and assembling the flash device having the above-described configuration, in addition to the above-described assembly operation of the reflecting plate 106 and the plate plate 107 in the vertical direction, as shown in FIG. It is necessary to perform an assembling operation in the lateral direction for attaching the pin terminals 101B protruding from both ends of the reflective plate 106 through the lateral holes 106A of the reflecting plate 106.
[0006]
In particular, when a xenon lamp is used as such a light source, in order to apply a trigger potential to the xenon tube 101A via the reflector 106 separately from the application of the potential to the pin terminal 101B, in other words, the pin terminal Since the potential applied to 101B and the trigger potential are different, it is necessary to insulate the pin terminal 101B and the reflector 106 so as not to contact each other. For this reason, as shown in FIG. 10, an insulating rubber 109 is interposed between the pin terminal 101B and the reflector so that a gap between the two is filled. Sex is also a nuisance.
[0007]
Furthermore, in the flash device having such a configuration, the number of parts is large, and the number of work steps is increased accordingly, which makes the assembly and assembly work more complicated and troublesome.
[0008]
Therefore, in view of the above-described circumstances, the present invention not only can minimize the possibility of causing work defects when assembling and assembling workability is good, but is also convenient for thinning. It is an object to provide a simple light source device.
[0009]
[Means for Solving the Problems]
The light source device of the present invention includes a printed circuit board on which predetermined wiring is patterned,
A light source lamp comprising a tube body housed in a state of entering an opening hole drilled and opened in the printed circuit board and terminals projecting from both ends of the tube body soldered to a pad on the printed circuit board;
A reflector fixed to the printed circuit board in a state surrounding the light source lamp;
And a cover plate that is attached to a surface of the printed circuit board opposite to the mounting surface of the reflection plate and covers the light source lamp in contact with the tube main body.
[0010]
In this way, a printed circuit board is used in place of the conventional holder, and a relatively thick light source lamp is fixed in a partially embedded state in the opening hole of the printed circuit board. Since it is not necessary to use a holder that has been a major factor in increasing the thickness, it is possible to reduce the thickness of the light source device. be able to.
[0011]
The light source device of the present invention uses a xenon tube as the light source,
The cover plate may constitute an electrode plate for applying a potential different from that of the terminal of the xenon tube by contacting and conducting with the trigger electrode of the xenon tube.
[0012]
As a result, it is not necessary to interpose the insulating rubber between the pin terminal and the reflector so as to fill the gap between the two, so that the work is unnecessary and the insulating rubber is unnecessary. As a result, the number of work steps and the number of parts can be reduced, and accordingly, the workability of assembling and assembling is good and the possibility of causing work defects can be suppressed as much as possible.
[0013]
In the light source device of the present invention, the reflection plate and the electrode plate are integrally formed,
The reflection plate may be attached to the printed circuit board in a non-contact manner with a pad on the printed circuit board to which the terminal of the xenon tube is connected.
[0014]
This eliminates the need to assemble the reflector and electrode plate separately, eliminating the need for that work and further reducing the number of man-hours and parts, and assembling and assembling work accordingly. The property is further improved.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[First Embodiment]
FIG. 1 and FIG. 2 show a light source device according to the present invention. This light source device has a xenon lamp (flash discharge lamp) 2 as a light source, a reflector 3 and an electrode plate on a printed circuit board 1. 4 is provided.
[0016]
The printed circuit board 1 is provided with a connection portion (pad or land) 1A of a required pattern for connecting to both pin terminals 22 of a xenon lamp (flash discharge lamp) 2 described later on the surface on which the reflector 3 is mounted. Wiring is formed.
Further, a trigger coil (not shown) of the xenon lamp 2 is mounted on the back surface of the printed circuit board 1, and the trigger coil and a xenon tube main body of the xenon lamp (flash discharge lamp) 2 described later. A pattern wiring provided with a connection portion (pad or land) 1B of a required pattern for connecting to a trigger electrode (not shown) provided in 21 is formed.
In addition, both pin terminals 22 are soldered to the connecting portion (pad or land) 1A of the printed circuit board 1 by reflow, whereby the xenon lamp (flash discharge lamp) 2 is mounted on the printed circuit board 1 and fixed. Has been.
[0017]
Further, the printed circuit board 1 is provided with an opening hole 11 formed in a substantially rectangular shape with a predetermined length and width between connection portions (pads or lands) 1A. As shown in FIG. 4, the xenon tube main body 21 is mounted and fixed in the opening hole 11.
[0018]
The xenon lamp 2 has a substantially cylindrical xenon tube main body 21 and pin terminals 22 projecting from both ends (constituting a cathode and an anode) of the xenon tube main body 21. The xenon lamp 2 has a trigger (not shown) of the xenon tube main body 21 from the coil via the reflector 3 separately from the pin terminal 22 as described in the section “Prior art”. A trigger potential E2 is applied to the electrode (electrical breakdown is caused in the xenon gas in the tube to be in an energetically excited state). Moreover, since the potential E1 applied to the pin terminal 22 and the potential E2 applied to the trigger electrode are different from each other, it is necessary to insulate the pin terminal 22 and the reflector 3 so as not to contact each other.
[0019]
The reflector 3 is securely fixed and mounted on a predetermined portion on the surface of the printed circuit board 1 by soldering or other appropriate means. The reflecting plate 3 of this embodiment is formed in a hollow, substantially quadrangular pyramid shape with both upper and lower surfaces opened, and the constricted opening portion opposite to the greatly expanding opening portion 31. In order to fix and fix 32 to a predetermined position on the surface of the printed circuit board 1, a fixed position (not shown) that is not electrically connected to the connection pattern (for example, soldering by reflow) ) A dedicated copper plate (copper foil) is formed.
[0020]
As described above, the electrode plate 4 has a unique potential E2 different from the potential E1 applied to the pin terminal 22 to a trigger electrode (not shown) formed of a wire or the like wound around the outer peripheral surface of the xenon tube main body 21. Is formed of a material having good electrical conductivity. As shown in FIGS. 1 and 3, the electrode plate 4 of this embodiment includes a curved surface portion 41 whose central portion is curved with substantially the same polarity following the outer peripheral surface of the xenon tube main body 21, and both sides of the curved surface portion 41. And a plane portion 42 that is soldered to a connection portion (pad or land) 1B on the printed circuit board 1 side to fix the electrode plate 4.
[0021]
The curved surface portion 41 is in close contact with the trigger electrode for electrical connection with a trigger electrode (not shown) provided on the outer peripheral surface of the xenon tube main body 21, thereby simultaneously with the xenon tube main body 21. A function of fixing and holding from the back side of the printed circuit board 1, a function of covering and protecting the outer peripheral surface of about half of the xenon tube main body 21, and a light emitted from the printed circuit board 1 when the xenon lamp emits light. It also has a light reflection function. In addition, in order that this curved-surface part 41 may perform electrical connection with the trigger electrode provided in the xenon tube main body 21 reliably, for example, as a structure which itself has a leaf | plate spring property, it contacts a trigger electrode with elastic force. You may comprise as follows.
[0022]
On the other hand, in order to apply a predetermined potential to the trigger electrode, the flat surface portion 42 is also formed on the back surface of the printed circuit board 1 through a connection portion (pad or land) 1B provided on the back surface of the xenon tube main body 21 and the printed circuit board 1. In order to connect to a trigger coil (not shown) that is mounted, it is soldered to a connecting portion (pad or land) 1B. In addition, the electrode plate 4 is physically fixed to the back surface of the printed circuit board 1 at the same time by soldering with the connection portion (pad or land) 1B.
[0023]
Next, a method for manufacturing the light source device according to this embodiment will be described.
(1) The trigger electrode plate 4 is soldered to a predetermined position and integrally attached to the back surface of the printed circuit board 1 by reflow using the printed circuit board 1 on which the required pattern wiring 1A is applied in advance.
[0024]
(2) Then, the reflector 3 is temporarily mounted at a predetermined position on the surface of the printed circuit board 1 and soldered by reflow, and the reflector 3 is fixed integrally to the surface of the printed circuit board 1.
[0025]
(3) Finally, as shown in FIG. 1, a xenon tube main body 21 is inserted into the opening hole 11 from the surface of the printed circuit board 1, and a pin terminal 22 of the xenon lamp 2 is provided on the surface of the printed circuit board 1. (Pad or land) Soldered and electrically connected to 1A, and fixed to the printed circuit board 1 integrally.
In this embodiment, the mounting order of the reflector 3 and the xenon lamp 2 may be reversed from the case described here.
[0026]
[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals to avoid redundant description.
[0027]
The second embodiment is different from the first embodiment in that a reflector plate integrally formed with a trigger electrode plate (indicated by reference numeral 4 in the first embodiment) (this is referred to as a main reflector plate). 6) (see FIG. 7A) and an auxiliary reflecting plate 7 (see FIG. 7B) that connects the missing portions between the main reflecting plates 6.
For this reason, in this embodiment, as shown in FIG. 6, in addition to the opening hole 51 for inserting the xenon tube main body 21 of the xenon lamp 2, the main reflector 6 and the auxiliary reflector 7 are formed in the printed board 5. A mounting hole 52 and a mounting hole 53 for inserting each of them are formed.
In FIG. 6, reference numeral 5A denotes a connecting portion (pad or land) provided on the surface of the printed circuit board 5 as in the first embodiment, and both terminals 22 of the xenon lamp 2 are soldered. It is like that.
[0028]
The main reflection plate 6 is disposed along the longitudinal direction of the xenon lamp 2 and includes a reflection portion 61 and an electrode portion 62 as shown in FIG. Among these, the reflection part 61 protrudes from the opening hole 52 of the printed circuit board 5 on the surface in an inclined state. Moreover, the electrode part 62 is arrange | positioned at the back surface of the printed circuit board 5 through the opening hole 52, is provided with the curved surface part 62A and the plane part 62B, and is provided with the function similar to the electrode plate 4 in 1st Embodiment. ing. When the main reflector 6 and the auxiliary reflector 7 are actually used, in the developed view shown in FIGS. 7A and 7B, the main reflector 6 and the auxiliary reflector 7 are folded at a dashed line and broken at a broken line. To form a three-dimensional shape.
[0029]
On the other hand, the auxiliary reflector 7 is disposed mainly along the short direction of the xenon lamp 2, and as shown in FIG. 7B, the first reflector 71, the second reflector 72, And a fixing portion 73.
The first reflecting portion 71 protrudes from the opening hole 53 of the printed circuit board 5 on the surface in an inclined state, and is disposed along the short direction of the xenon lamp 2.
On the other hand, the second reflecting portion 72 is used to close a gap between the reflecting portion 61 of the main reflecting plate 6 and the first reflecting portion 71 of the auxiliary reflecting plate 7 that is generated obliquely. And the joining part of both the reflection parts 61 and 71 is integrally joined by appropriate means, such as welding, from the outer surface side.
The fixing portion 73 is for inserting the auxiliary reflecting plate 7 into the printed circuit board 5 through the opening hole 53 and fixing the auxiliary reflecting plate 7 to the printed circuit board 5. A copper plate (copper foil) dedicated to fixation (for example, soldering by reflow) that is not electrically connected is formed.
[0030]
In these embodiments, a xenon lamp is used as a light source. However, the present invention is not particularly limited to this xenon lamp, and various lamps can be applied.
[0031]
【The invention's effect】
As described above, according to the present invention, the printed circuit board on which the predetermined wiring is patterned, the tube main body and the pad on the printed circuit board that are accommodated in the state of entering the opening hole formed in the printed circuit board. A light source lamp having terminals projecting from both ends of a soldered tube body, a reflector fixed to the printed circuit board in a state of surrounding the light source lamp, and a mounting surface of the reflective board on the printed circuit board And a cover plate that covers the surface of the light source lamp in contact with the tube body.
[0032]
Therefore, according to the present invention, the light source lamp having a relatively large thickness is fixed in the opening hole of the printed circuit board in a state of being partially embedded, and moreover, it is bulky and is a major factor that increases the thickness of the entire apparatus. Since there is no need for the holder, it is possible to reduce the thickness of the light source device.
[0033]
In addition, according to the present invention, since the insulating rubber is interposed between the pin terminal and the reflecting plate as in the prior art so as not to fill the gap between the two, the work is not necessary and the insulation is performed. The amount of work man-hours and the number of parts can be reduced as much as the use of rubber is unnecessary, so that the workability of assembly and assembly is good and the possibility of causing work defects can be suppressed as much as possible. Become.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a light source device according to a first embodiment of the present invention.
2 is a plan view of FIG. 1. FIG.
3 is a cross-sectional view taken along line III-III in FIG.
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is a side sectional view showing a light source device according to a second embodiment of the present invention.
FIG. 6 is a plan view of an essential part showing a printed circuit board used in a second embodiment of the present invention.
7A and 7B are development views showing a main reflector and an auxiliary reflector used in the second embodiment of the present invention. FIG.
FIG. 8 is an exploded perspective view showing a conventional method of manufacturing a light source device.
FIG. 9 is an explanatory view showing a state when a light source is attached to a reflection plate during the manufacture of a conventional light source device.
10 is an explanatory view showing a state in which a reflector rubber is attached between the light source and the reflection plate after being attached to the reflection plate shown in FIG. 9 during the manufacture of the conventional light source device.
[Explanation of symbols]
1 Printed circuit board 1A Connection (pad or land)
1B Connection (pad or land)
11 Opening hole 2 Light source (xenon lamp)
21 Xenon tube body 22 Pin terminal 3 Reflector 31 Opening 32 Opening 4 Electrode plate (cover plate)
41 curved surface portion 42 flat surface portion 5 printed circuit board 5A connection portion (pad or land)
51 Aperture hole 52 Attachment hole 53 Attachment hole 6 Main reflector 61 Reflector 62 Electrode part 62A Curved part 62B Plane part 7 Auxiliary reflector 71 First reflector 72 Second reflector 73 Fixing part

Claims (3)

A printed circuit board on which predetermined wiring is patterned;
A light source lamp comprising a tube body housed in a state of entering into an opening hole drilled and opened in the printed circuit board, and terminals protruding from both ends of the tube body soldered to a pad on the printed circuit board;
A reflector fixed to the printed circuit board in a state surrounding the light source lamp;
A light source device comprising: a cover plate that is attached to a surface of the printed circuit board opposite to a mounting surface of the reflection plate and covers the surface of the light source lamp in contact with the tube body. While using a xenon tube as the light source,
2. The light source device according to claim 1, wherein the cover plate constitutes an electrode plate for contacting and conducting with a trigger electrode of the xenon tube to apply a potential different from a terminal of the xenon tube. The reflector and the electrode plate are integrally formed,
The light source device according to claim 2, wherein the reflection plate is attached to the printed circuit board in a non-contact state with a pad on the printed circuit board to which a terminal of the xenon tube is connected.

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