JP2003051619A - LED mounting structure - Google Patents

Abstract

(57) [Problem] To provide an LED mounting structure in which a common holder can be applied to LEDs having different sizes and component manufacturing costs and component management costs can be reduced. SOLUTION: A plurality of positioning portions for selectively arranging a plurality of types of LEDs having different diameters are provided in a holder for positioning and holding a main body of an LED with a lead terminal on a circuit board. . For example, two types of LEs, large and small, are provided in a holder 10 that holds an LED in an upward position.
D is a concave step portion 10a on which the main body 12 of one of the LEDs 11 having a larger diameter can be mounted, and a concave portion which is exposed inside the concave step portion 10a and can mount the main body 15 of the other LED 14 having a smaller diameter. 10b. Thereby, the die cost of the holder can be saved and the number of parts can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED mounting structure for mounting an LED with a lead terminal on a circuit board while positioning and holding the LED with a holder, and particularly when mounting a plurality of types of LEDs having different diameters. And a holder suitable for use in.

[0002]

2. Description of the Related Art Light emitted from an LED (light emitting diode) has a high directivity, and therefore is mounted on a circuit board.
If there is a positional deviation such as an inclination, the amount of light supplied from the LED to the front illumination area is extremely reduced, and the brightness is apt to be insufficient. In particular, in the case of an LED with a lead terminal, when the LED is directly mounted on a circuit board, the lead terminal is soldered while the main body of the LED is tilted with respect to the circuit board or displaced in the height direction. There is a risk of Therefore, a technique is widely known in which a holder for holding an LED is attached to a circuit board in advance, and the main body of the LED with lead terminals is positioned and held by this holder.

FIG. 7 is a sectional view showing a conventional example of an LED mounting structure using such a holder. In the figure, LE
D1 is composed of a main body portion 2 having a collar portion 2a and two lead terminals 3 protruding downward from the bottom surface of the main body portion 2. In the circuit board 4, a terminal through hole 4a for penetrating the lead terminal 3 of the LED 1 and a pin insertion hole 4b for inserting and positioning a mounting pin 5c of a holder 5 described later.
Has been drilled. The holder 5 made of synthetic resin has an LED
A positioning recess 5a for disposing the main body 2 of
A terminal insertion hole 5b is provided at two places on the bottom surface of the positioning recess 5a, and a mounting pin 5c for defining a mounting position on the circuit board 4. The diameter of the positioning recess 5a of the holder 5 is substantially the same as the diameter of the flange portion 2a of the LED 1. In addition, this holder 5 has a mounting pin 5c.
Is inserted into the pin insertion hole 4b of the circuit board 4, the terminal insertion hole 5b is designed to be located right above the terminal through hole 4a of the circuit board 4.

In FIG. 7, when mounting the LED 1 on the circuit board 4, first, the mounting pins 5c are inserted into the pin insertion holes 4b to position the holder 5 on the circuit board 4, and then the terminals of the holder 5 are inserted. The lead terminal 3 of the LED 1 is inserted into the hole 5b from above. As a result, the main body 2 of the LED 1 is arranged in the positioning recess 5a of the holder 5, and the tip end of the lead terminal 3 penetrates the terminal through hole 4a of the circuit board 4 and projects downward. After that, the circuit board 4
When the lead terminal 3 protruding from the bottom surface of the LED and a connection land (not shown) provided on the bottom surface of the circuit board 4 are soldered by dip soldering or the like, the LED 1 is positioned in the holder 5 and the circuit board 4 is positioned. Since it is mounted on the main body 2, the main body 2 can be always arranged at a stable position.

[0005]

By the way, the above-mentioned L
The distance (terminal pitch) between the two lead terminals 3 of the ED1 is
In principle, it is unified to 2.54 mm, but the main body 2
There is not one kind of size, and there are a body part 2 having a diameter of 3 mm and a body part 2 having a diameter of 5 mm which is slightly large. These LEDs of different sizes are appropriately selected according to the application. For example, when illuminating a relatively wide area brightly, a LED with a diameter of 5 mm is often adopted, and when illuminating a very narrow area for on / off visual recognition, etc. Has a diameter of 3
The mm type is often used. Then, conventionally, it is necessary to prepare a plurality of types of holders 5 having different sizes of the positioning recesses 5a according to the plurality of types of LEDs having different sizes, but the terminal insertion holes 5b and the like are common. It is not efficient to prepare multiple types of holders 5,
There is a problem that the manufacturing cost of the parts including the die cost increases and the parts management becomes complicated.

The present invention has been made in view of the circumstances of the prior art as described above, and its purpose is to provide LEs of different sizes.
It is an object of the present invention to provide an LED mounting structure in which a common holder can be applied to D, and component manufacturing costs and component management costs can be reduced.

[0007]

In order to achieve the above-mentioned object, in the LED mounting structure according to the present invention, between the main body of the LED with lead terminals and the circuit board to which the lead terminals are soldered. A holder is interposed, and the holder is provided with a plurality of positioning portions for selectively disposing the main body portions of a plurality of types of LEDs having different sizes.

As described above, if a plurality of positioning portions are provided in one holder and the body portions of the LEDs having different sizes can be selectively arranged in the respective positioning portions, the holders can be used in common so that parts can be manufactured. Manufacturing costs and parts management costs can be reduced.

For example, in the holder, a recessed step portion on which the main body of one of the two types of LEDs having a larger diameter can be mounted in an upward posture, and the recessed stepped portion is exposed inside the recessed step portion and has a small diameter. By providing a recess that allows the other LED body to be mounted in an upward posture, a common holder is used when mounting two types of LEDs, large and small, that emit light in a direction substantially perpendicular to the circuit board. Can be made. As a result, the die cost of the holder can be saved, so that the component manufacturing cost can be reduced and the holder management cost can be reduced because it is not necessary to change the holder according to the size of the mounted LED.

Alternatively, there are two types of L in the holder.
One of the LEDs having the smaller diameter in the ED has a plurality of supporting portions that face each other with a space in which the body portion of the LED having a smaller diameter can be inserted in a lateral orientation, and that can laterally sandwich the body portion, By providing an elastic pressing portion that can be elastically held and held on the main body of the other LED with a large diameter mounted in a posture,
A common holder can be applied when mounting two types of LEDs, large and small, which emit light in a direction substantially parallel to the circuit board.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an LED mounting structure according to an embodiment, and FIG. 2 is a view showing a holder shown in FIG. FIG. 3 is a perspective view, FIG. 3 is a plan view of the holder shown in FIGS. 1 and 2, FIG. 4 is a front view showing an LED mounting structure according to another embodiment, and FIG. 5 is a side view of the LED mounting structure shown in FIG. 6 is a perspective view of the holder shown in FIGS.

First, an embodiment of the present invention will be described with reference to FIGS. In these drawings, reference numeral 10 generally indicates a holder made of synthetic resin. In the holder 10, a concave step portion 10a on which a main body 12 of an LED 11 having a diameter of 5 mm can be mounted in an upward posture, The LED 14 having a diameter of 3 mm which is exposed inside the concave step portion 10a
There is provided a recess 10b on which the main body 15 can be mounted in an upward posture. The diameter of the recessed step portion 10a is about 5 mm so that the collar portion 12a of the main body portion 12 of the LED 11 can be positioned in the radial direction, and the diameter of the recess portion 10b can position the collar portion 15a of the main body portion 15 of the LED 14 in the radial direction. It is about 3 mm. The main body 12 of the LED 11 and the main body 15 of the LED 14 are substantially D-shaped. Corresponding to this shape, the large-diameter concave step portion 10a and the small-diameter concave portion 10b are both substantially D-shaped in plan view. Since it is formed, LED
The LED 11 and the LED 14 are assembled in the holder 10 in a state where the circumferential direction is regulated, so that the LED 1
There is no concern about mounting the LED 1 or the LED 14 with the wrong polarity. Two terminal insertion holes 10c for inserting the lead terminals 13 of the LEDs 11 and the lead terminals 16 of the LEDs 14 are formed at two locations on the inner bottom surface of the recess 10b of the holder 10. Further, on the bottom surface of the holder 10, two mounting pins 10d are provided so as to project downward so as to define the mounting position with respect to the circuit board 17.

The circuit board 17 includes LEDs 11 and LEDs.
A terminal through hole 1 for penetrating the lead terminals 13, 16 of the LEDs 11, 14 on a substrate on which 14 and the like are mounted.
7a and a pin insertion hole 17b for inserting and positioning the attachment pin 10d of the holder 10 are formed. When the attachment pin 10d is inserted into the pin insertion hole 17b, the terminal insertion hole 10c becomes the terminal through hole 17a. Designed to be directly above.

The holder 10 described above has two types of LEDs 1 of large and small, which emit light in a direction substantially perpendicular to the circuit board 17.
It can be applied to both 1 and 14. That is, when mounting the LED 11 having the diameter of the main body 12 of 5 mm on the circuit board 17, first, the mounting pin 10 d is inserted into the pin insertion hole 17 b to position the holder 10 on the circuit board 17, and then the holder 10 is positioned. The lead terminal 13 of the LED 11 is inserted from above into the terminal insertion hole 10c.
As a result, as shown by the solid line in FIG. 1, the main body portion 12 of the LED 11 is mounted on the terrace surface of the concave step portion 10a of the holder 10, and the flange portion 12a is radially positioned on the inner wall of the concave step portion 10a. At the same time, the tip portion of the lead terminal 13 penetrates the terminal through hole 17a of the circuit board 17 and projects to the bottom surface side. After that, the lead terminals 13 protruding from the bottom surface of the circuit board 17 and the connection lands (not shown) provided on the bottom surface are soldered by dip soldering or the like.
11 is a circuit board 17 in a state of being positioned in the holder 10.
Since it is mounted on the top, the main body 12 can be always arranged at a stable position.

Further, an LED whose main body portion 15 has a diameter of 3 mm
When mounting the LED 14, it is not necessary to change the holder 10, and if the lead terminal 16 of the LED 14 is inserted from above into the terminal insertion hole 10c of the holder 10 attached to the circuit board 17, the chain line in FIG. As shown by, LED1
The main body 15 of No. 4 is mounted on the inner bottom surface of the recess 10b of the holder 10, and the collar portion 15a is in a state of being radially positioned by the inner wall of the recess 10b. Therefore, if the lead terminal 16 penetrating the terminal through hole 17a of the circuit board 17 and projecting downward and the connection land are soldered,
D14 is the circuit board 1 with the holder 10 positioned.
Since it is mounted on 7, the main body 15 can be always arranged at a stable position.

As described above, in this embodiment, one holder 10 has a recessed step portion 10a which is a positioning portion for the LED 11 having a diameter of 5 mm and a recess 10b which is a positioning portion for the LED 14 having a diameter of 3 mm. Since two types of main body portions 12 and 15 having different diameters can be selectively arranged at the respective positioning portions, there are two types of large and small that emit light in a direction substantially perpendicular to the circuit board 17. LED1
The common holder 10 can be applied when mounting the components 1 and 14. That is, in the present embodiment example, two types of large and small L
Since it is not necessary to prepare two types of dedicated holders corresponding to each of the EDs 11 and 14, the die cost of the holder can be saved and the number of parts can be reduced, and the parts manufacturing cost and the parts management cost can be significantly reduced. Can be achieved.

Next, another embodiment of the present invention will be described with reference to FIGS. In these drawings, reference numeral 20 generally indicates a holder made of synthetic resin, and portions corresponding to those in FIGS. 1 to 3 are denoted by the same reference numerals.

As shown in FIGS. 4 and 5, the holder 20 can be applied to both large and small types of LEDs 11 and 14 that emit light in a direction substantially parallel to the circuit board 17. In this holder 20, the main body 1 of the LED 14 having a diameter of 3 mm is
A total of four support portions 20a are provided upright at positions facing each other through a space portion S into which 5 can be inserted in a horizontal posture (see FIG. 6).
And two slightly long elastic pressing portions 20b which can be elastically held by the main body portion 12 of the LED 11 having a diameter of 5 mm mounted on the supporting portion 20a in a horizontal posture, and are bent into a substantially L shape. LED 11,14 lead terminals 13,1
6 (see FIG. 5) for inserting the distal end portion of the terminal insertion hole 2
0c (see FIG. 6) and a mounting pin (not shown) that is inserted into a pin insertion hole (not shown) of the circuit board 17 to define the mounting position.

When the main body 15 of the LED 14 having a diameter of 3 mm is inserted into the space S in a horizontal posture, the main body 15 is laterally clamped by the four supporting portions 20a, and thus the space is maintained. It will be held in the section S. Further, when the main body 12 of the LED 11 having a diameter of 5 mm is mounted on the four support portions 20a in a sideways posture by utilizing the bending of the upper end of each elastic pressing portion 20b, the main body 1
2 is the support portion 20 due to the elastic force of each elastic pressing portion 20b.
Since it is pressed down on a, it is held on the space S. Thus, two types of large and small LEDs 1 that emit light in a direction substantially parallel to the circuit board 17
If the common holder 20 can be used at the time of mounting Nos. 1 and 14, the die cost of the holder can be saved and the number of parts can be reduced as in the above-described embodiment. Further, the terminal insertion hole 20c of the holder 20 is a long hole, and the LEDs 11, 1
The distance (terminal pitch) between the four lead terminals 13 and 16 is 2.
It is also adapted to handle cases of 54 mm or more.

In the above description of the present invention, only the case where two types of LEDs having a diameter of 3 mm and a diameter of 5 mm are mounted is described, but the present invention is also applicable when mounting LEDs of other sizes. It goes without saying that it can be applied.
It is also possible to manufacture the holder in a shape applicable to three or more types of LEDs.

[0021]

The present invention is carried out in the form as described above, and has the following effects.

Since a plurality of positioning portions are provided in one holder, and the main bodies of LEDs having different sizes can be selectively placed in the respective positioning portions, a common holder is applied to a plurality of types of LEDs. Thus, it is possible to provide an excellent LED mounting structure that can reduce the component manufacturing cost and the component management cost.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an LED mounting structure according to an embodiment of the present invention.

FIG. 2 is a perspective view of the holder shown in FIG.

FIG. 3 is a plan view of the holder shown in FIGS.

FIG. 4 is a front view showing an LED mounting structure according to another embodiment of the present invention.

5 is a side view of the LED mounting structure shown in FIG. 4. FIG.

FIG. 6 is a perspective view of the holder shown in FIGS.

FIG. 7 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

10,20 holder 10a Recessed step portion (positioning portion) 10b Recess (positioning part) 10c, 20c terminal insertion hole 10d mounting pin 11,14 LED 12, 15 Main body 13,16 Lead terminal 17 circuit board 17a Terminal through hole 17b Pin insertion hole 20a Supporting part (positioning part) 20b Elastic pressing part (positioning part) S space section

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shuichi Sato             1-7 Aki, Otsuka-cho, Yukiya, Ota-ku, Tokyo             Su Electric Co., Ltd. F term (reference) 5F041 AA42 DB02 DC12 DC23 DC24                       DC32 DC54 DC66

Claims (3)

[Claims] 1. A holder is interposed between a main body of an LED having a lead terminal and a circuit board to which the lead terminal is soldered, and the holder has a plurality of types of L different in size.
An LED mounting structure comprising a plurality of positioning portions for selectively disposing the main body of the ED. 2. The recessed step part according to claim 1, wherein a main body part of one of the two types of LEDs having a larger diameter can be mounted in the holder in an upward posture, and the recessed part of the recessed step part. A mounting structure for an LED, characterized in that a recess is formed so that the main body of the other LED that is exposed inside and has a smaller diameter can be mounted in an upward posture. 3. The holder according to claim 1, wherein a main body of one of the two types of LEDs having a smaller diameter is opposed to the holder via a space in which the main body can be inserted in a horizontal posture. A plurality of supporting portions that can be sandwiched from the side, and an elastic pressing portion that can be elastically contacted and held by the main body portion of the other LED having a large diameter mounted on these supporting portions in a horizontal posture are provided. Characteristic LED mounting structure.