JP2870552B2 - Light emitting diode unit for indicator light - 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 diode unit for illuminating an illumination surface of an indicator lamp which receives light from a light emitting diode and illuminates the illumination surface from inside a box.

[0002]

2. Description of the Related Art An indicator lamp of this type is disclosed, for example, in Japanese Utility Model Laid-Open No. 2-62.
It is better known from the '482 publication. FIG. 4 is an exploded perspective view showing a configuration example of a conventional indicator light. The illumination surface 1A is formed by stacking a square colored transparent color plate 2A made of a thermoplastic resin, a name plate 3A for diffusing light, and a colorless transparent plate 4A. This illuminating surface 1A is fitted into a lamp cover frame 5A formed in a square frame from the front side in the figure. The light emitting diode unit 6A is formed as an irradiating body that illuminates the illumination surface 1A from the back side in the figure, and is fitted on the back side of the lamp cover frame 5A (the light emitting diode is hereinafter abbreviated as LED). L
The ED unit 6A is fitted in the square section 8A or 80A of the box 7 of the indicator light, and forms one of the square illumination surfaces of the indicator light.

On the other hand, in FIG. 4, an illuminating surface 1B is formed of a rectangular color plate 2B, a name plate 3B, and a transparent plate 4B, and is fitted into a lamp cover frame 5B having a rectangular frame. The two LED units 6B and 6C are assembled in the lamp cover frame 5B in a state of being adjacent to each other, and fitted into the rectangular section 8B of the box 7. LED unit 6
B and 6C form one of the rectangular illuminated surfaces of the indicator light and are approximately twice as wide as the square illuminated surface.

FIG. 5 is an exploded perspective view showing the detailed structure of the LED unit shown in FIG. LE on the surface of the printed circuit board 9
D elements 10 are arranged in the vertical and horizontal directions. The reflection frame 11 has a through hole 13 formed in an inverted truncated pyramid shape between frame members 12 facing each other. The exits of the through holes 13 correspond to the arrangement positions of the LED elements 10 on the bottom side 14 of the reflection frame 11, respectively. The filler is filled. The holder 15 integrated with the reflection frame 11 is provided with two stepped cylinders 16 into which flat rivets 17 are inserted, and then a compressible coil spring 18 is inserted. ing. When the coil spring 18 is inserted into the stepped cylinder 16, the upper end protrudes outside. On the back side of the printed circuit board 9, wiring (not shown) for supplying power to the LED element 10 is formed, and an electrode surface (not shown) is formed at a position facing the coil spring 18. By pressing the holder 15 against the back side of the printed circuit board 9, the electrode surface of the printed circuit board 9 and the coil spring 18 are brought into conductive contact. The head of the flat rivet 17 is pushed downward in the drawing by the coil spring 18 to supply power to the lower end of the flat rivet 17 so that L
Lighting power is supplied to the ED element 10.

[0005] In FIG. 5, the reflection frame 11 includes a frame member 12.
With legs 19 extending from the bottom side 14 of the
Four fitting windows 20 arranged at a predetermined pitch in the lateral direction penetrate the leg 19. Further, protrusion ears 21 are provided on both lateral end surfaces of the leg portion 19. The holder 15 includes an arm 22 extending in the direction of the reflection frame 11, and a fitting leg 23 extending in a direction opposite to the arm 22 and fitted and fixed to the box side of the indicator light. Arm
Two fitting projections 24 protrude from 22, and a fitting window of the reflection frame 11 is provided.
They are arranged at the same pitch as 20 and can be fitted to any of the fitting windows 20.

[0006] By pressing the reflection frame 11 against the holder 15 from above, the fitting window 20 and the fitting projection 24 are fitted, and the reflection frame 11 and the holder 15 are integrated. At that time,
By selecting a predetermined one of the four fitting windows 20 into which the fitting 24 is fitted, it is possible to adjust the horizontal relative relationship in which the holder 15 and the reflection frame 11 are fixed. FIG. 6 shows FIG.
FIG. 2 is a front view showing a configuration of an LED unit that irradiates a square illumination surface of FIG. Two fitting projections 24A projecting from the arm 22A of the holder 15A are fitted to two inner fitting windows 20A provided on the legs 19A of the reflection frame 11A. At this time, the protruding ears 21A are formed so as to be pinched by the arm portions 22A. With this configuration, the holder 15A and the reflection frame 11A are fixed without being shifted in the lateral direction.

However, the LED inserted in the section 8B of FIG.
Some units, such as units, have an illuminating surface that is twice as wide in the horizontal direction as in the vertical direction. In this case, the LED unit itself can be manufactured separately in a rectangular shape, but the number of parts of the LED unit increases. Therefore, as shown in FIG. 4, square LED units 6B and 6C are arranged side by side and fitted into the box 7, so that only the illumination surface 1B is formed in a rectangular shape. If two LED units having the configuration shown in FIG. 6 are arranged as they are and only the illuminating surface is horizontally long to be shared, when the LED unit is housed in the box 7 as shown in FIG.
Inevitably, a dark portion having a width D is generated between the D units. Stepped cylinder 16 through which flat rivet 17 for power supply passes
Without changing the position (necessary for common use of the wiring pattern on the power supply side), the relative fixing position of the holder and the reflection frame is shifted in order to eliminate a dark portion between the LED units.

FIG. 7 shows a light source L for illuminating the rectangular illuminating surface shown in FIG.
It is a front view showing the composition of an ED unit. Holder 15B
The two fitting projections 24B protruding from the arm 22B of the
It is fitted into two fitting windows 20B on the left side provided on the leg 19B of 11B. Similarly, two fitting projections 24C protruding from the arm 22C of the holder 15C are connected to the legs 19C of the reflection frame 11C.
Are fitted into the two right fitting windows 20C provided on the right side. At the time of assembling, one side of each of the projection ears 21B and 21C is cut off. With this configuration, the positions of the holders 15B and 15C are kept as they are, and the reflection frames 11B and 1
Since only 1C comes close to each other, the width d at which the illuminated surface is darkened is smaller than the width D in FIG.

[0009]

However, in the conventional apparatus as described above, when the relative mounting position between the reflector and the holder is changed, it is necessary to temporarily remove the holder from the reflector and reassemble. There was a problem.

In order to remove the reflection frame from the holder, it was necessary to bend the legs of the reflection frame slightly to widen the gap between the legs, and to pull out the fitting projection of the holder from the fitting window of the leg.
Further, an operation of reassembling the fitting projection so as to be fitted to another fitting window has been performed. Such a task is very difficult to perform, and requires a lot of working time. For this reason, there has been a problem that the time for bending and spreading the legs of the reflection frame is long, and the roots of the legs are easily broken. Further, there is a problem in quality control such that the coil spring pops out during the operation, and the coil spring is lost or reassembled without the coil spring.

An object of the present invention is to provide an assembled LED.
An object of the present invention is to provide a device capable of changing a relative mounting position between a holder and a reflection frame without disassembling the unit.

[0012]

According to the present invention, in order to achieve the above object, an illumination surface of an indicator lamp for receiving light from a light emitting diode and illuminating the illumination surface is illuminated from the inside of the box. A printed circuit board on which a plurality of light emitting diodes are arranged in a horizontal direction and a vertical direction, and the illuminating surface provided with the printed circuit board on a bottom side and arranged with light from the light emitting diodes on a side opposite to the bottom side. A reflective frame having legs extending from the bottom surface side of the frame member forming the lateral direction to the anti-illumination surface side, and an arm portion engaged with and fixed to the leg portions of the reflective frame, and printed. Forming a voltage introduction part to the substrate and comprising a holder fitted into a fixed position in the box body, comprising a guide window and a circular window in which the legs of the reflection frame penetrate in a square shape, The arm of the holder is the guide window It has a guide projection fitted and slidable laterally along the edge of the guide window, and a rounded projection fitted to the round window, and the round projection is arranged on the arm at a predetermined pitch. A plurality of guides are arranged in the direction, and the guide protrusion is fitted to the guide window, and the holder is movably reflected by selecting the round protrusion to be fitted to the round window while sliding the holder in the lateral direction with respect to the reflection frame. It shall be attached to the frame. In addition to this configuration, the shape of the round projection provided on the arm of the holder is a hemisphere,
Furthermore, the round window is arranged at the center of the horizontal width of the reflective frame, and the round projections are composed of an odd number and are arranged symmetrically on both sides in the horizontal direction with the border arranged at the center of the horizontal width of the holder. It shall have been done.

[0013]

According to the structure of the present invention, the reflection frame is provided with the guide window penetrating in a rectangular shape and the round window penetrating in a circular shape in the leg portion. On the other hand, the holder has a guide projection and a round projection on its arm. The guide projection is configured to fit into the guide window and to slide laterally along the edge of the guide window. A plurality of round protrusions are arranged on the arm portion at a predetermined pitch in the lateral direction and are formed in a rounded shape. The holder can be movably attached to the reflection frame by selecting the round projection to be fitted to the round window while fitting the guide projection to the guide window and sliding the holder in the lateral direction with respect to the reflection frame. With this configuration, the relative mounting positions of the assembled LED units can be changed by a simple operation of simply pushing the reflective frame of the assembled LED unit in the lateral direction with respect to the holder.

In addition to the above configuration, by making the shape of the round protrusion provided on the arm portion of the holder into a hemisphere, when the reflection frame is pushed and slid in the horizontal direction, the leg portion is placed on the round protrusion. Since the movement can be performed smoothly, the work of changing the relative mounting position between the holder and the reflection frame becomes easy.

Further, in addition to the above configuration, the round window is arranged at the center of the horizontal width of the reflection frame, and the odd number of round projections is formed. Also, one round projection is arranged at the center of the width of the holder in the horizontal direction, and the remaining round projections are symmetrically arranged on both sides in the horizontal direction with the center as a boundary. With such a configuration,
Since the reflection frame can slide to either side in the horizontal direction with respect to the holder, it is not necessary to increase the number of components of the LED unit.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.
FIG. 1 is an exploded perspective view showing a detailed configuration of an LED unit according to an embodiment of the present invention. A guide window 25 penetrating in a rectangular shape and a round window 26 penetrating in a circular shape are provided on the leg portion 190 of the reflection frame 110. On the other hand, a guide projection 27 is provided on the arm 220 of the holder 150 so as to fit into the guide window 25 and to slide the edge of the guide window 25 in the lateral direction. Further, three hemispherical round projections 28 projecting outward from the lower part of the guide projection 27 are arranged at the same pitch. One round projection 28 is arranged at the center in the width direction of the holder 150, and the other two are arranged on both sides. The other configuration is the same as that of the conventional apparatus in FIG. 5, and the detailed description is omitted by using the same reference numerals for the same parts.

FIG. 2 is a front view showing the structure of the LED unit shown in FIG. 1 which irradiates a square illumination surface. Guide projection 27A and round projection 28 protruding from arm 220A of holder 150A
A is a guide window 25A provided on the leg 190A of the reflection frame 110A.
And the round window 26A arranged at the center, and the holder 150A and the reflection frame 110A are fixed to each other at the center in the lateral direction.

FIG. 3 is a front view showing the structure of an LED unit 6A in which two of the LED units shown in FIG. 1 illuminate a rectangular illuminating surface.
The guide projection 27B protruding from the arm 220B of the holder 150B and the round projection 28B disposed on the right side of the figure are connected to the leg 19 of the reflection frame 110B.
The guide window 25B and the round window 26B provided on the front panel 0B are fitted respectively. Similarly, a guide projection 27C protruding from the arm 220C of the holder 150C and a round projection 28C arranged on the left side of the figure are provided with a guide window 25C and a round window 26C provided on the leg 190C of the reflection frame 110C.
Respectively. With this configuration, the gap d between the LED units can be made the same as the gap in the conventional device in FIG. 7, and the dark portion of the illuminated surface is eliminated.

In order to assemble the structure as shown in FIG.
For example, for the LED unit having the configuration shown in FIG.
When 150A is pressed laterally (to the right or left in the figure) with respect to the reflection frame 110A, the round projection 28A is hemispherical, and the leg 190A is pressed.
Sliding on the next round window while sliding on the surface of. On the other hand, since the guide window 25A is opened horizontally, the guide protrusion 27A also slides, and the holder 150A and the reflection frame 110A are also fixed in the vertical direction.

The round projection of the holder is detached from the round window while being fitted to the legs of the reflective frame in two directions, when the reflective frame is fitted from above and when the reflective frame is slid horizontally. If it is hemispherical, it slides smoothly, but other shapes may be frustoconical. Also, by appropriately selecting the pitch of the round protrusions arranged on the arm portion, the LED unit 110A of FIG. 2 is arranged at the center, and the LED units 110B and 110C of FIG. By arranging them, it is possible to configure an indicator light having an illumination surface whose horizontal width is three times the vertical width.

Further, the number of round projections is increased, for example, 5
By arranging the holders symmetrically on the left and right sides, the LED units 110B and 110C in FIG. 3 can be configured to be closer to the left and right sides, and the width in the horizontal direction is four times the width in the vertical direction. LE with indicator light
The configuration can be made without increasing the number of parts of the D unit 6A.

[0022]

As described above, according to the present invention, a guide window and a round window are provided on a leg portion of a reflective frame, and a guide protrusion and a plurality of round protrusions respectively fitted to these windows are provided on a holder arm. Therefore, the relative mounting position can be easily changed simply by pushing the reflection frame in the lateral direction and sliding the holder. Therefore, the working time can be significantly reduced, and the legs are not broken. Since it is no longer necessary to disassemble the device as in the case of the conventional device, the coil spring does not jump out and quality control is facilitated. As the coil spring slides on the electrode surface when sliding at the contact portion between the coil spring and the electrode surface of the printed circuit board, dirt and adhered insulating film are scraped off, and the reliability of the contact portion's conductivity with respect to the conventional Even better than the ones.

Further, since the round protrusion of the holder arm is formed in a hemispherical shape, the holder and the reflection frame can move smoothly with each other, thereby shortening the working time.

Further, by arranging the round window in the center of the reflection frame and arranging an odd number of round projections symmetrically with respect to the center of the holder, the lateral width can be reduced without increasing the number of parts of the LED unit. An indicator lamp having an illuminated surface that is widened to an integral multiple of the vertical width can be configured.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a detailed configuration of an LED unit according to an embodiment of the present invention.

FIG. 2 shows an LED in which the one shown in FIG.
Front view showing the configuration of the unit

FIG. 3 shows two L's of FIG. 1 illuminating a rectangular illuminated surface
Front view showing the configuration of the ED unit

FIG. 4 is an exploded perspective view showing a configuration example of a conventional indicator light.

FIG. 5 is an exploded perspective view showing a detailed configuration of the LED unit in FIG. 4;

FIG. 6 is a front view showing the configuration of an LED unit that illuminates the square illumination surface of FIG. 4;

FIG. 7 is a front view showing the configuration of an LED unit that illuminates the rectangular illumination surface of FIG. 4;

[Explanation of symbols]

 110 Reflection frame 150 Holder 12 Frame member 13 Through hole 14 Bottom side 190 Leg 25 Guide window 26 Round window 9 Printed circuit board 10 LED element 18 Coil spring 17 Flat rivet 220 Arm 27 Guide protrusion 28 Round protrusion 16 Stepped cylinder 23 Fitting Joint foot

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shinichi Sato 1-1-1, Tanabeshinda, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fuji Electric Co., Ltd. ) Surveyed field (Int.Cl. ⁶ , DB name) F21Q 3/00 G09F 9/33 H01L 33/00

Claims (3)

(57) [Claims] An illumination surface of an indicator lamp for receiving light from a light emitting diode and illuminating the illumination surface from the inside of a box body, wherein a plurality of light emitting diodes are provided on the surface in a horizontal direction and a vertical direction. And a printed circuit board arranged on the bottom surface, the light from the light-emitting diode provided on the bottom surface side is guided to the illuminating surface arranged on the opposite bottom surface side, and the opposite illuminating surface from the bottom surface side of the frame member forming the horizontal direction A reflective frame having legs extending to the side, and an arm engaging and fixing to the legs of the reflective frame, forming a voltage introducing portion to the printed circuit board and being fitted into a fixed position in the box. A leg portion of the reflection frame includes a guide window penetrating in a square shape and a circular window penetrating in a circular shape, and an arm portion of the holder fits in the guide window and an edge portion of the guide window. With a guide projection that can slide laterally along A round projection fitted to the round window, and a plurality of round projections are arranged in the arm portion in the lateral direction at a predetermined pitch, and the guide projection is fitted to the guide window and a holder is provided. A light emitting diode unit for an indicator light, wherein the holder is movably mounted on the reflection frame by selecting a round projection to be fitted to the round window while sliding in a horizontal direction with respect to the reflection frame. 2. A light emitting diode unit for an indicator lamp according to claim 1, wherein the shape of the round projection provided on the arm of the holder is a hemisphere. 3. The method according to claim 1, wherein
The round window is arranged at the center of the horizontal width of the reflection frame, and the round projections are composed of an odd number and are arranged symmetrically on both sides in the horizontal direction with the border arranged at the center of the horizontal width of the holder. A light emitting diode unit for an indicator light, characterized in that: