JP2006278843A - Light emitting diode display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light emitting diode display device in which a light emitting diode can be mounted on a substrate and the diode can be easily replaced. <P>SOLUTION: An LED display device 10 comprises an LED 1, a rubber-made ring 3 as a resilient member having a lead frame 2 of the LED 1 inserted therein, a substrate 5 electrically connected to the LED 1, and a drive circuit board 6 for driving the LED display device 10. The LED 1 is rotated at a predetermined angle in such a state that the lead frame 2 is inserted together with a larger-diameter 2a, and the larger diameter 2a of the lead frame 2 is engaged to a clamping part to mount the LED 1 on the substrate 5. Consequently, the LED 1 can be easily mounted on the substrate 5 without performing soldering work or the like. When it is necessary to replace the LED 1, its replacing work can be easily attained. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a light-emitting diode display device in which a light-emitting diode is mounted on a substrate to display a light.

  2. Description of the Related Art A light-emitting diode display device that arranges a plurality of light-emitting diodes and displays characters and figures in lighting is used in various places both indoors and outdoors. Conventionally, when a light emitting diode is mounted on a display substrate of a light emitting diode display device, a method of mounting a lead frame of the light emitting diode by soldering is used.

  In general, a drive circuit board is connected to a display substrate of a light emitting diode display device on a surface opposite to the light emitting diode mounting surface. Therefore, when a light emitting diode fails, this drive circuit board is first removed from the display board, then the solder is removed from the display board, the light emitting diode is replaced, and the lead frame of the light emitting diode is again soldered to the display board. Finally, an operation of connecting the drive circuit board to the display board has to be performed, which is a very complicated operation.

Therefore, Patent Document 1 discloses a light emitting diode display device that does not require soldering when the light emitting diode is mounted on a substrate. As shown in FIG. 7, the light emitting diode 20 of the light emitting diode display device 30 of Patent Document 1 includes a cutout portion 20 c that regulates the mounting direction on the outer shape and a lead frame 20 a that is bent at a substantially right angle as a leg portion. Have. The plurality of light emitting diodes 20 are connected to a wiring circuit portion provided on the wiring board 22 by a plurality of light emitting diode insertion holes 28 a provided on the light emitting diode guide 28 placed on the substrate wiring 22. 24 and the lead frame 20a are positioned with directivity so that the positions of the lead frame 20a are aligned. The plurality of light emitting diodes 20 are mounted on the wiring board 22 by fixing the light emitting diode alignment plate 26 that regulates the posture of the plurality of light emitting diodes 20 to the wiring board 22 with the screws 27 at the corners.
JP-A-7-64491

  The light emitting diode 20 of Patent Document 1 can be mounted on the wiring board 22 without soldering by the above-described structure. However, since all the light emitting diodes 20 are mounted on the wiring board 22 by tightening the light emitting diode alignment plate 26 to the wiring board 22 with the screws 27, even if only one light emitting diode 20 fails, the light emitting diode 20 can emit light. Unless the diode alignment plate 26 is removed from the wiring board 22, the failed light emitting diode 20 cannot be replaced. That is, the light emitting diode display device 30 is removed from the installation place and placed horizontally, and the target light emitting diode 20 cannot be replaced unless the light emitting diode alignment plate 26 is removed by loosening the screws 27. It is very annoying and takes time.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a light emitting diode display device in which a light emitting diode can be mounted on a substrate without soldering and the light emitting diode can be easily replaced.

  The light-emitting diode display device of the present invention is a light-emitting diode display device in which the light-emitting diode is mounted on a substrate, and the light-emitting diode has a pair of lead frames each having a large diameter portion, and the pair of lead frames An elastic body having an insertable opening is mounted between the board and the board. The board has an insertion part into which a large diameter part provided in the lead frame can be inserted, and the elastic body is compressed. When the lead frame moves together with the large-diameter portion from the insertion portion by deformation, and when the lead frame enters from the passage portion, the large-diameter portion cannot be inserted / removed / moved due to the deformation recovery of the compression-deformed elastic body. A pair of groove portions each having a latching portion that is a simple opening is provided.

  According to the light emitting diode display device of the present invention, the large diameter part of the lead frame is inserted / removed by the latching part of the groove part provided in the substrate, utilizing the elastic action of the elastic body interposed between the light emitting diode and the substrate. Further, since the movement becomes impossible, the light emitting diode can be mounted on the substrate without soldering. Further, since the light emitting diode is mounted only with this configuration, the light emitting diode can be easily replaced.

  1st invention of this application WHEREIN: In the light emitting diode display device with which the light emitting diode was mounted in the board | substrate, a light emitting diode has a pair of lead frame each provided with the large diameter part, and this pair of lead frame can be penetrated An elastic body having a flexible opening is mounted between the substrate and the substrate. The substrate includes an insertion portion in which a large diameter portion provided in the lead frame can be inserted, and an insertion portion formed by compressing and deforming the elastic body. A groove portion having a passage portion in which the lead frame can move together with the large-diameter portion, and a latching portion in which the large-diameter portion is an opening that cannot be inserted / extracted and moved by the deformation recovery of the elastic body that is compressed and deformed when entering from the passage portion A pair of light emitting diode display devices is provided.

  The lead frame of the light emitting diode is inserted into an insertion portion of a groove provided in the substrate in a state where an elastic body through which the lead frame is inserted is interposed between the lead frame and the substrate. The lead frame moves together with the large-diameter portion in the passage portion that is movable by compressing and deforming the elastic body toward the substrate. When entering from the passage portion, the elastic body that has been compressed and deformed is deformed and recovered, so that the large-diameter portion of the lead frame cannot be inserted / removed and moved by the opening of the latching portion. Thereby, a light emitting diode can be easily mounted on a substrate without using soldering. Therefore, since the cost for soldering can be omitted, a light emitting diode display device that is less expensive than the conventional one can be obtained.

  Also, if it is necessary to replace the light emitting diode due to a failure, etc., it can be easily removed from the board by performing the reverse operation of the above mounting, so the light emitting diode that has stopped lighting due to failure or life Can be easily replaced. In particular, even when the light-emitting diode display device is installed at a high place or the like, the light-emitting diode can be replaced without removing the light-emitting diode display device from the installation location, and the work becomes easy.

  In addition, as an elastic body, what was formed with resin, such as rubber | gum, and the thing which included the spring can be used.

  The light emitting diode of the present invention is inserted and removed from the substrate by moving the lead frame together with the large diameter portion into the insertion portion of the groove portion of the substrate and then moving in the passage portion and hooking the large diameter portion into the opening of the latching portion. And immovable. The lead frame may be moved in parallel, but is preferably rotated. Accordingly, a second invention of the present application is characterized in that, in the first invention of the present application, the passage portion of the substrate is formed such that the lead frame is rotatable.

  As a result, compared to the case of parallel movement, it can be mounted on the substrate without much changing the position of the light emitting diode from the state in which the lead frame is inserted to the state in which the large diameter portion is hooked to the hooking portion. The space of the substrate for mounting the light emitting diode can be reduced. In order to minimize the space of the substrate on which the light emitting diode is mounted, it is more preferable to rotate the light emitting diode by a predetermined angle around the vertical center portion of the light emitting diode.

  According to a third invention of the present application, in the second invention of the present application, the elastic body surrounds a pair of groove portions formed in the substrate.

  When the light-emitting diode display device is installed outdoors, the periphery of the light-emitting diode is often sealed with a resin in order to prevent the failure of the light-emitting diode due to intrusion of rainwater or the like. Therefore, when a light-emitting diode fails, the resin around the light-emitting diode must be removed, and after replacement, the resin must be partially poured again. In some cases, color unevenness due to changes with time or the like occurs in the resin and the surrounding resin, thereby deteriorating the aesthetics of the light-emitting diode display device. However, according to the light emitting diode display device of the present invention, the pair of lead frames is inserted into the opening formed in the elastic body, and the light emitting diode is mounted on the substrate in a state where the elastic body surrounds the groove formed in the substrate. Since it is mounted, it is possible to prevent rainwater, dust and the like from entering the groove, and even if the light-emitting diode display device of the present invention is installed outdoors, a light-emitting diode display device with few failures can be obtained. In addition, since it is not necessary to perform sealing with resin by using an elastic body, it is possible to omit a complicated operation when replacing the light emitting diode, and to make a light emitting diode display device that does not impair the appearance of the display device. be able to. Furthermore, a light-emitting diode display device that is less expensive than the case where resin sealing is performed can be obtained. In addition, since the elastic body can prevent intrusion of rainwater, dust, or the like into the groove provided in the substrate as long as it covers the groove formed in the substrate, the shape of the elastic body can be determined as appropriate.

  According to a fourth invention of the present application, in the first to third inventions of the present application, the light emitting diode has a claw portion that serves as a knob when moving the lead frame.

  Since the light emitting diode has the claw portion, the claw portion can be pinched and moved when the light emitting diode is attached to the substrate, so that the light emitting diode can be easily attached to the substrate.

(Embodiment)
Hereinafter, a light-emitting diode (Light-Emitting Diode; hereinafter referred to as LED) display device according to an embodiment of the present invention will be described with reference to the drawings. 1A and 1B are diagrams illustrating an LED display device according to an embodiment of the present invention, in which FIG. 1A is a perspective view, FIG. 1B is a cross-sectional view taken along line AA in FIG. 1A, and FIG. It is BB sectional drawing of (a). 2A and 2B are diagrams showing the LED according to the embodiment of the present invention. FIG. 2A is a cross-sectional view, and FIG. 3A and 3B are diagrams showing a part of the substrate of the LED display device according to the embodiment of the present invention. FIG. 3A is a front view, FIG. 3B is a sectional view taken along the line S-S in FIG. ) Is a cross-sectional view taken along the line U-U in FIG. 4A, and FIG. 4D is a cross-sectional view taken along the line TT in FIG.

  As shown in FIG. 1, the LED display device 10 of the present invention includes an LED 1, a rubber ring 3 as an elastic body through which the lead frame 2 of the LED 1 is inserted, a substrate 5 electrically connected to the LED 1, The drive circuit board 6 is attached to the board 5 and drives the LED display device 10.

  As shown in FIGS. 1 and 2, the LED 1 is provided on both sides of the shell-shaped head 1 a serving as a light emitting portion and the head 1 a to facilitate rotation when the LED 1 is rotated at a predetermined angle. And a lead frame 2 that protrudes from the head 1a and serves as a leg of the LED 1.

  A disc-shaped large diameter portion 2 a is provided at the tip of the lead frame 2. The large-diameter portion 2a is hooked to a latching portion 8b of a groove portion 8 of the substrate 5 described later so as not to be inserted / extracted and moved. In addition, the conduction surface 2 b that is the upper surface side of the large diameter portion 2 a is a surface that can be electrically connected to the substrate 5.

  The ring 3 is an O-ring having an opening through which the lead frame 2 can be inserted. The opening is formed smaller than the head 1a of the LED 1 so that the lower part of the head 1a of the LED 1 can compress and elastically deform the ring 3. Further, in order to prevent rainwater and dust from entering the groove 8 of the substrate 5 described later, the outer periphery of the ring 3 is slightly larger than the outer shape of the LED 1 and is formed so as to surround the groove 8 of the substrate 5. Yes.

  The substrate 5 is formed with a groove 8 for mounting the LED 1. As shown in FIG. 3, the groove 8 has a cylindrical insertion portion 8 a into which the large-diameter portion 2 a of the lead frame 2 can be inserted, and the lead frame 2 is inserted, and the LED 1 is further pushed into the substrate 5 side. By compressing and deforming the ring 3 interposed between the LED 1 and the substrate 5, the lead frame 2 and the large-diameter portion 2a can rotate at a predetermined angle from the insertion portion 8a, and this passage When entering from the portion 8c, the ring 3 that has been compressed and deformed is recovered from deformation, whereby the large-diameter portion 2a of the lead frame 2 is configured by a convex-shaped hooking portion 8b having an opening that cannot be inserted and removed and moved. . A wiring pattern is formed on the latching surface 8d of the latching portion 8b, and comes into contact with the conductive surface 2b of the large diameter portion 2a of the lead frame 2 to be electrically connected to the LED1.

  As shown in FIG. 1, a plurality of LEDs 1 are mounted on a substrate 5 in the LED display device 10, and each LED 1 has a pair of lead frames 2, so that the substrate 5 has a pair of grooves 8 for each LED 1. Is formed. In the present embodiment, the central axis of the bullet-type LED 1 is used as the rotation axis in order to minimize the mounting area of the LED 1. Therefore, the groove 8 is also formed so as to be symmetric with respect to this rotational axis. Thereby, when LED1 is mounted, all the groove parts 8 will be located in the lower part of LED1, and it can be set as the structure which cannot see the groove part 8 from the front, and it can be set as the LED display apparatus 10 excellent in aesthetics. .

  The drive circuit board 6 is a circuit for driving the LED display device 10 of the present embodiment, and is attached to the board 5 by screws 7.

  Next, the assembly of the LED display device 10 of this embodiment will be described with reference to FIGS. 4 and 5. 4 is a cross-sectional view showing a process of attaching the LED 1 to the substrate 5, and FIG. 5 is a perspective view showing a process of attaching the LED 1 to the board.

  First, the drive circuit board 6 is attached to the board 5 with screws 7. Next, the lead frame 2 of the LED 1 is inserted through the opening of the ring 3, and the large diameter portion 2 a of the lead frame 2 is inserted into the insertion portion 8 a of the substrate 5 with the ring 3 interposed under the claw portion 4 ( (A), (b) of FIG. 4 and FIG. In order to move the lead frame 2 to the latching portion 8b together with the large diameter portion 2a, the ring 3 is enlarged by pinching the claw portion 4 and pushing the LED 1 toward the substrate 5 (FIG. 4 and FIG. 5C). Compress and deform. In this state, the LED 1 is rotated by a predetermined angle (FIG. 4 and FIG. 5D). At this time, the large diameter portion 2a of the lead frame 2 of the LED 1 rotates through the passage portion 8c. When the LED 1 is rotated by a predetermined angle, the pushing of the LED 1 toward the substrate 5 is stopped. As a result, the LED 3 is pushed up by the deformation and recovery of the ring 3 that has been compressed and deformed by the elastic action of the ring 3, so that the disk-shaped large-diameter portion 2 a of the lead frame 2 becomes the latching portion 8 b having a convex section in the groove portion 8. It is latched and LED1 is fixed to the board | substrate 5 in the state which cannot be inserted / removed and moved ((e) of FIG. 4 and FIG. 5). At this time, the connection surface 2b of the large-diameter portion 2a of the lead frame 2 is in close contact with the latching portion 8b of the substrate 5, so that the LED 1 is electrically connected to the substrate 5.

  In this way, the plurality of LEDs 1 mounted on the LED display device 10 are individually fixed.

  As described above, in the LED display device 10 of the present embodiment, the LED 1 is rotated to a predetermined angle with the lead frame 2 inserted together with the large diameter portion 2a, and the large diameter portion 2a of the lead frame 2 is engaged with the latching portion 8b. Since the LED 1 is mounted on the substrate 5 by being hooked onto the board 5, the LED 1 can be easily mounted without performing work such as soldering. In addition, because of this structure, the plurality of LEDs 1 are individually fixed to the grooves 8 formed on the substrate 5, so that when the LED 1 fails or needs to be replaced due to its life, the above mounting method is used. In the reverse order, only the failed LED 1 can be removed, and only the target LED 1 can be easily replaced while the other LEDs 1 are mounted.

  In the present embodiment, the central axis of the LED 1 is the rotation axis, and the groove 8 is formed so as to be symmetric with respect to the rotation axis. Therefore, when the LED 1 is mounted, the groove 8 is all in the lower part of the LED 1. Further, the outer periphery of the ring 3 is slightly larger than the outer shape of the LED 1 and is formed so as to surround the groove 8 of the substrate 5. And the large diameter part 2a is latched by the latching | locking part 8b in the state in which this ring 3 was slightly compressed and deformed, and LED1 and the board | substrate 5 are closely_contact | adhered firmly. Therefore, it is possible to prevent rainwater, dust, and the like from entering the drive circuit board 6, and the LED display device 10 with few failures can be obtained even when the LED display device 10 of the present embodiment is installed outdoors.

  In this embodiment, the rubber ring 3 is used as the elastic body. However, any ring may be used as long as it is formed of a material having elasticity. For example, a resin ring including a spring may be used.

  Moreover, although LED1 is fixed to the board | substrate 5 by rotating a predetermined angle, about this angle, it can set suitably.

  The ring 3 of the present embodiment has a configuration in which openings through which the pair of lead frames 2 can be inserted are provided. However, two openings are provided in accordance with the positions of the lead frames 2, and the lead frames 2 are inserted into the respective openings. It may be a configuration. Thereby, since the area of the opening provided in the ring 3 can be made small, intrusion of rainwater etc. and dust can be prevented more.

  In addition, although the groove part 8 formed in the board | substrate 5 of this embodiment is formed in the penetrated state, when the board | substrate is thick, the large diameter part 2a and the lead frame 2 can be inserted, and these are rotated. If the opening that can be moved to hook the large-diameter portion 2a can be formed, the groove portion can be formed without penetrating the substrate.

  As another embodiment, as shown in FIG. 6, the large-diameter portion 12a of the lead frame 2 can be formed in a conical shape with the tip cut off, and the latching portion 18b of the substrate 5 can be formed in a mortar shape. As a result, the conducting surface 12b of the large diameter portion 12a and the latching surface 18d of the latching portion 18b become inclined surfaces, and the contact area increases, so that a more electrically stable connection state can be ensured. Further, since the large-diameter portion 12a of the lead frame 2 is formed in a conical shape with the tip cut off, the lead frame 2 of the LED 1 is inserted into the insertion portion 8a of the substrate 5 and the LED 1 is rotated by a predetermined angle. The conductive surface 12b of the large diameter portion 12a can be hardly caught on the passage portion 8c. Thereby, fixing operation to the board | substrate 5 of LED1 can also be performed more smoothly.

  Further, not limited to the above-described embodiment, the large-diameter portion 2a can be a protruding latch piece formed in a state of protruding from the lead frame 2.

  According to the present invention, in a light emitting diode display device in which a plurality of light emitting diodes are arranged on a substrate and characters and figures are lit and displayed, the light emitting diodes can be mounted on the substrate without being soldered. It is useful as a light emitting diode display device that can be easily replaced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the LED display apparatus in embodiment of this invention, (a) is a perspective view, (b) is the sectional view on the AA line of the figure (a), (c) is the figure (a). BB sectional view of It is a figure which shows LED in embodiment of this invention, (a) is sectional drawing, (b) is the A section enlarged perspective view of the same figure (a). It is a figure which shows a part of board | substrate of the LED display apparatus in embodiment of this invention, (a) is a front view, (b) is the SS sectional view taken on the line (a), (c) is the same. A sectional view taken along the line U-U in FIG. (A), and (d) is a sectional view taken along the line TT in FIG. Sectional drawing which shows process of attaching LED to substrate The perspective view which shows the process of attaching LED to a board | substrate Sectional drawing of the LED display apparatus in other embodiment It is a figure which shows the conventional LED display apparatus, (a) is a front view, (b) is the sectional view on the AA line of the same figure (a), (c) is a perspective view of LED.

Explanation of symbols

10 LED display device 1 LED
DESCRIPTION OF SYMBOLS 1a Head 2 Lead frame 2a, 12a Large diameter part 2b, 12b Conductive surface 3 Ring 4 Claw part 5 Substrate 6 Drive circuit board 7 Screw 8 Groove part 8a Insertion part 8b, 18b Hanging part 8c Passage part 8d, 18d Hanging surface

Claims (4)

In the light emitting diode display device in which the light emitting diode is mounted on the substrate,
The light emitting diode has a pair of lead frames each having a large diameter portion, and is mounted in a state where an elastic body having an opening through which the pair of lead frames can be inserted is interposed between the substrate and the substrate,
The board includes an insertion portion into which the large-diameter portion provided in the lead frame can be inserted, and a passage portion in which the lead frame can move together with the large-diameter portion from the insertion portion by compressing and deforming the elastic body. A light emitting diode display device provided with a pair of groove portions each having a latching portion in which the large-diameter portion is opened and unmovable by the deformation recovery of the compression-deformed elastic body when entering from the passage portion. The light emitting diode display device according to claim 1, wherein the passage portion of the substrate is formed so that the lead frame is rotatable. The light emitting diode display device according to claim 1, wherein the elastic body surrounds a pair of grooves formed in the substrate. 4. The light emitting diode display device according to claim 1, wherein the light emitting diode has a claw portion that serves as a knob for moving the lead frame. 5.

Images