JP2001291904A - Led lamp and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lamp where position precision in the case of board mounting can be easily ensured, without having to use a jig and a holder and board mounting is surely ensured. SOLUTION: The bars of two leads 3, 4 are bent in the direction almost perpendicular to a plane including the leads 3, 4 and in the mutually opposite directions, and bent parts 3a, 3b are formed. When the LED lamp is mounted on a board, position in the heightwire direction is determined by bent parts 3a, 3b, which become retainers and prevent the inclination in the front and rear directions (direction along a plane almost perpendicular to the arrangement direction of the leads).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED lamp having a built-in light emitting diode and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as an LED lamp, FIG.
As shown in FIG. 2, a lens portion 52 having a light emitting diode (not shown) built therein, and a lens portion 52 extending downward from the lens portion 52.
FIG. 5 is a cross-sectional view of a part of the tie bar portion 55 having the two leads 53 and 54 and connecting the leads 53 and 54.
As shown in (b), there is a lead 53 provided with overhanging portions 53a, 53b and a lead 54 provided with overhanging portions 54a, 54b for positioning at the time of mounting on a substrate. The projecting portions 53a, 53b, 54a, 54b project along the direction in which the leads 53, 54 are arranged, as shown in FIG. 5C, and are on a plane including the leads 53, 54.

[0003]

By the way, the above LED
In the lamp 51, as shown in FIG.
The leads 53, 54 (only 53 is shown in FIG. 6) are inserted into the holes 61 of the 0, and the lower sides of the overhang portions 53a, 53b, 54a, 54b (only 53a is shown in FIG. 6) are brought into contact with the substrate 60. To regulate the height direction. However, lead 5
The LED lamp 51 is inclined forward and backward in the direction of the arrow R (in the direction along the plane substantially perpendicular to the lead arrangement direction) due to the clearance between the holes 3 and 54 and the board 60 and the L.
Jigs and holders to ensure positional accuracy with ED lamp 51
(Not shown), LED is required if there is no jig or holder
There is a problem that the lamp 51 cannot be reliably mounted on the substrate 60.

It is an object of the present invention to provide an LED lamp which can easily secure the positional accuracy at the time of mounting on a board without using a jig or a holder and can reliably mount the board.

[0005]

In order to achieve the above object, an LED lamp according to the present invention comprises an LED lamp having a built-in light emitting diode, and a tie bar portion of at least one of two leads so as to be self-supporting when mounted on a substrate. Is characterized by having a bent portion formed by bending the.

[0006] Typical uses of LED lamps include backlights used as light sources for indicators and displays, and information boards using a large number of such lamps. The specifications of LED lamps required for these uses are as follows. However, what is commonly required is ease of assembly.

According to the LED lamp of the present invention, a bent portion is formed by bending a punched portion which has been conventionally treated as scrap when punching a tie bar portion, and the bent portion serves as a support, so that the LED at the time of mounting on the substrate is mounted.
It is possible to suppress inclination of the lamp in the front-rear direction (direction along a plane substantially perpendicular to the arrangement direction of the leads).
Accordingly, it is not necessary to deal with the inclination of the LED lamp at the time of mounting the substrate (a jig and a holder) as compared with the related art, so that the cost and the working time can be reduced. Further, since the bent portion can be realized only by using the tie bar cutting mold, new equipment is not required. It is also effective as a measure to prevent the LED lamp from falling down during automatic mounting.

In one embodiment, the bent portion is bent in a direction substantially perpendicular to a plane including the two leads.

According to the LED lamp of the above embodiment, since the bent portion is bent in a direction substantially perpendicular to the plane including the two leads, the bent portion serves as a support when the substrate is mounted, and the front and rear direction (lead (In a direction along a plane substantially perpendicular to the arrangement direction) can be effectively prevented.

In one embodiment of the present invention, at least one of the bent portions is bent in a direction opposite to the other bent portions.

According to the LED lamp of the above embodiment, at least one of the bent portions is bent in a direction opposite to the other bent portions, so that the LED lamp is substantially aligned with the arrangement direction of the leads when mounted on the board. Inclination in both directions along the plane at right angles can be reliably prevented.

In one embodiment, at least one of the bent portions has a different length from the other bent portions.

According to the LED lamp of the above-described embodiment, for example, the smaller the number of the bent portions in both directions, the longer the size of the bent portions, so that the same manner of supporting the tilt in both directions can be achieved.

Further, the method of manufacturing an LED lamp according to the present invention is the method of manufacturing an LED lamp having the tie bar cutting step of any one of the LED lamps, wherein the tie bar cutting step is performed after fixing the lead to a mold. ,
The tie bar portion of the lead is cut at a predetermined position, and then the cut tie bar portion is substantially perpendicular to the lead and the arrangement direction of the lead with the vicinity of the lead having one end connected to the tie bar portion as a fulcrum. It is characterized in that it is bent at substantially right angles with respect to.

According to the LED lamp of the above embodiment, an LED lamp having a function of preventing inclination at the time of mounting can be easily manufactured by a simple tie bar cutting process.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an LED lamp according to the present invention and a method for manufacturing the same will be described in detail with reference to the illustrated embodiments.

(First Embodiment) FIG. 1A is a side view of an LED lamp according to a first embodiment of the present invention, and FIG. 1B is a back view of the LED lamp.

As shown in FIG. 1A, the LED lamp 1 includes a lens portion 2 having a built-in light emitting diode (not shown), and two leads 3 and 4 extending downward from the lens portion 2. have. The tie bar portion connecting the leads 3 and 4 is cut at a predetermined position to remove a part thereof, and the remaining tie bar portion is bent in a direction substantially perpendicular to a plane including the leads 3 and 4, so that the leads 3 and 4 are bent. 4 are provided with bent portions 3a and 4a, respectively. The bending direction of the bent portion 3a of the lead 3 and the bent portion 4a of the lead 4 are set to be opposite.

According to the LED lamp 1, the bent portions 3a, 4a of the leads 3, 4 serve as supports when mounted on the board, and are inclined in the front-rear direction (along a plane substantially perpendicular to the arrangement direction of the leads). I can do it. Accordingly, a jig and a holder corresponding to the inclination of the LED lamp 11 at the time of mounting on the board are not required, and the cost and the working time can be reduced. Further, since the bent portions 3a and 4a can be realized only by using a tie bar cut mold, new equipment and the like are not required. It is also effective as a measure to prevent the LED lamp from falling down during automatic mounting.

(Second Embodiment) FIG. 2A is a side view of an LED lamp according to a second embodiment of the present invention, and FIG. 2B is a back view of the LED lamp.

As shown in FIGS. 2A and 2B, the LED lamp 11 includes a lens portion 12 having a light emitting diode (not shown) built therein and two leads extending downward from the lens portion 12. 13 and 14. The above lead 13,1
4 is cut at a predetermined position to remove a part thereof, and the remaining tie bar portion is bent in a direction substantially perpendicular to a plane including the leads 13 and 14, and the bent portion 13a, 13b are provided, and the lead 14 is provided with bent portions 14a and 14b. The bent portion 13a of the lead 13 and the bent portion 14a of the lead 14 are bent to one side, and the bent portion 13b of the lead 13 and the bent portion 14b of the lead 14 are bent to the other side.

As described above, in the LED lamp 11,
Until the tie bar portions outside the leads 13 and 14 are bent in the opposite direction, it is the same as the LED lamp 1 of the first embodiment, but the bent portions 13b and 14b are also provided inside the spaces between the leads 13 and 14, The bent portions 13a and 13b and the bent portions 14a and 14b form crank-shaped shapes, respectively.

Therefore, the LED lamp 11 of the second embodiment has the same effect as the LED lamp 1 of the first embodiment, and also has four bent portions 13a, 13b, 14a of the leads 13, 14 when mounted on a board. , 14b serve as supports and can be more reliably prevented from tilting in the front-rear direction (direction along a plane substantially perpendicular to the arrangement direction of the leads).

(Third Embodiment) FIG. 3 (a) is a side view of an LED lamp according to a third embodiment of the present invention, and FIG. 3 (b) is a rear view of the LED lamp.

As shown in FIGS. 3A and 3B, the LED lamp 21 includes a lens portion 22 having a light emitting diode (not shown) built therein and two leads extending downward from the lens portion 22. 23 and 24. The above lead 23,2
4 is cut at a predetermined position to remove a part thereof, and the remaining tie bar portion is bent in a direction substantially perpendicular to a plane including the leads 23 and 24, and the bent portion 23 a, 23b are provided, and the lead 24 is provided with a bent portion 24a. The bending direction of the bent portion 23a of the lead 23 and the bent portion 24a of the lead 24 are set to be opposite directions, and the bent directions of the bent portions 23a and 23b of the lead 23 are set to be opposite directions.

As described above, in the LED lamp 21 described above,
Until the tie bar portions outside the leads 23 and 24 are bent in the opposite direction, it is the same as the LED lamp 1 of the first embodiment, but the inside of the lead 23 is also bent at a substantially right angle to form a crank-like shape. One bent portion 23b is longer than the other bent portions 23a, 24a.

Therefore, the LED lamp 21 of the third embodiment has the same effects as the LED lamp 1 of the first embodiment, and supports the bent portions 23a, 23b, 24a of the leads 23, 24 during mounting on a board. , And can be prevented from tilting in the front-rear direction (direction along a plane substantially perpendicular to the arrangement direction of the leads). In addition, one bent portion 23b
Is made longer than the other bent portions 23a, 24a, it is possible to make the same manner of supporting the tilt in both directions.

(Fourth Embodiment) FIGS. 4A to 4D are views showing a tie bar cutting step using a tie bar cutting die in a method of manufacturing an LED lamp according to a fourth embodiment of the present invention.
The LED lamp at this time has the same configuration as the LED lamp shown in FIG. 2 of the second embodiment.

First, as shown in FIG. 4, the lead 31 is placed on the lead fixing portion 42 of the lower die, and a part of the tie bar portion 32B extending to one side of the lead 31 is placed on the lower lead bent portion 46. I do. Then, the lead fixing portion 41 of the upper mold,
By lowering the upper lead bending portion 43 and the upper lead cutting portion 45 and raising the lower lead cutting portion 44, as shown in FIG. 4B, the lead fixing portion 41 of the upper die, the upper lead bending portion 43, The lead 31 (including the tie bar portions 32A and 32B) is fixed between the upper lead cutting portion 45, the lower die lead fixing portion 42, the lower lead cutting portion 44, and the lower lead bending portion 46. The lead fixing portion 41 of the upper mold presses the lead 31 with an appropriate pressure by the cushion 50.

Next, as shown in FIG. 4C, the upper lead cutting portion 45 is further lowered to cut the tie bar portion 32B by the upper lead cutting portion 45 and the lower lead bending portion 46, while cutting the lower lead cutting portion 45. The portion 44 is further raised, and the tie bar portion 32A is cut by the lower lead cutting portion 44 and the upper lead bending portion 43.

Next, as shown in FIG. 4 (d), the cut tie bar portions 33, 34 are vertically bent along the dies 43, 46 in a direction substantially perpendicular to the longitudinal direction of the lead 31 and in the opposite direction. Bend.

Then, the upper lead cutting portion 45, the lower lead cutting portion 44, the upper lead bending portion 43, and the lower lead bending portion 46, which are the movable portions of the upper and lower dies, respectively, are placed at initial positions (shown in FIG. 4A). And the cutting and bending process of the tie bar portion is completed.

In this way, the LED lamp shown in FIG. 2 of the second embodiment can be easily manufactured by a simple tie bar cutting process.

[0034]

As is clear from the above, the L of the present invention is
According to the ED lamp and the method for manufacturing the same, L
Jigs and holders are no longer necessary to cope with the inclination of the ED lamp, which reduces costs and shortens working time. In addition, it can be realized only with tie bar cut molds,
No new equipment is required. In addition, LE during automatic mounting
It is also effective as a measure to prevent the D lamp from falling.

[Brief description of the drawings]

FIG. 1A is an LED according to a first embodiment of the present invention;
FIG. 1B is a side view of the lamp, and FIG. 1B is a rear view of the LED lamp.

FIG. 2 (a) is an LED according to a second embodiment of the present invention.
FIG. 2B is a side view of the lamp, and FIG. 2B is a rear view of the LED lamp.

FIG. 3A is an LED according to a third embodiment of the present invention.
FIG. 3B is a side view of the lamp, and FIG. 3B is a rear view of the LED lamp.

FIG. 4 is a diagram showing a manufacturing process of an LED lamp according to a fourth embodiment of the present invention.

FIG. 5 (a) is a side view of a conventional LED lamp before punching out a tie bar portion, and FIG. 5 (b) is a side view of the LED lamp after punching out the tie bar portion. c)
FIG. 6 is a rear view of the LED lamp shown in FIG.

FIG. 6 is a diagram showing a state where the LED lamp is mounted on a substrate.

[Explanation of symbols]

1,11,21 ... LED lamp, 2,12,22 ... Lens part, 3,4,13,14,23,24 ... Lead, 3a, 4a, 13a, 13b, 14a, 14b, 23a, 23b, 24a
… Bending part.

Claims (5)

[Claims] 1. An LED lamp incorporating a light emitting diode, wherein the LED lamp has a bent portion formed by bending at least one tie bar portion of two leads so as to be self-supporting when mounted on a substrate. . 2. The LED lamp according to claim 1, wherein the bent portion is bent in a direction substantially perpendicular to a plane including the two leads.
ED lamp. 3. The LED lamp according to claim 2, wherein at least one of the bent portions is bent in a direction opposite to the other bent portions. 4. The LED lamp according to claim 3, wherein at least one of the bent portions has a different length from other bent portions. 5. The method of manufacturing an LED lamp according to claim 1, further comprising the step of: fixing the lead to a mold, and then fixing the lead to a die. Cut the tie bar part of the lead at a predetermined position,
Thereafter, the cut tie bar portion is bent substantially at right angles to the lead and at substantially right angles to the arrangement direction of the leads, with the vicinity of the lead having one end connected to the tie bar portion as a fulcrum. Lamp manufacturing method.