JP2509660B2 - LED display module - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an LED mounted by soldering on a printed board.
The present invention relates to a (light emitting diode) display module, and more specifically to an LED display module having a structure in which an LED display portion and a soldering terminal portion are arranged at a right angle.

[Conventional technology]

Conventionally, an LED is mounted on an end portion of a printed circuit board to display an operating state of an electronic circuit formed on the printed circuit board. In particular, when a large number of LEDs are required such as an I / O module of a programmable controller, an LED display module in which a plurality of LEDs are integrated and integrally configured is used.

[Problems to be Solved by the Invention]

In an I / O module of a programmable controller, a printed circuit board is housed in a box having opposite side surfaces and mounted vertically on a back panel.
In order to save space, the box is manufactured with a width as small as possible, and it is common that a large number of boxes are closely attached to adjacent I / O modules and are closely spaced. The LED display section is provided on the surface of the I / O module at right angles to the printed circuit board. Normally, the width of the LED display part is set to be approximately the same as the width of this box to make the display easier to see, so the printed circuit board is inevitably located at the center of the width of the LED display module or a little to the side The LED display module will be located at a right angle to the near side.

In such a configuration, if you try to automatically solder the printed circuit board (flow soldering, wave soldering, etc.), one end of the LED display module will be immersed in the solder, so solder it by hand. There was a problem that I had to do it.

The present invention has been made in view of such a point,
LED that can be automatically soldered when mounted on a printed circuit board
It is intended to provide a display module.

[Means for solving the problem]

In the present invention, in order to solve the above problems, a display unit including a plurality of LEDs, a base including a substantially U-shaped holding unit and a soldering terminal unit capable of slidably holding the display unit, and A flexible conductive member connecting the display unit and the soldering terminal unit, at least one locking unit provided on the inner surface of the holding unit, and a shape capable of engaging with the locking unit, It has two or more locked parts provided on the side surface of the display part, and the display part is configured to have two or more locked positions in the inner cavity of the holding part. LED display module is provided.

[Action]

The display section is inserted into the inner cavity of the holding section, and the locked section on the side surface of the display section is locked by the locking section provided on the inner side surface of the holding section, and is stabilized at the locking position. Since two or more locked parts are provided along the side surface of the display part, the locked part has two or more locking positions and can be selectively locked at any locking position. Since the conductive member is a flexible member, it does not hinder the movement of the display unit.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a perspective view of an LED display module according to an embodiment of the present invention. The base 2 includes a substantially U-shaped holding portion 4 and a soldering terminal portion 6. The soldering terminal portion 6 has a large number of terminals 8. The display unit 10 has a shape and size corresponding to the shape and size of the inner cavity of the holding unit 4, and the display surface 12 thereof has a large number of LEDs 1.
4 are arranged.

The both sides 16 and 18 on the inner side of the holding portion 4 are provided with protrusions 20 as locking portions (only one of which is shown). An upper groove 22 and a lower groove 24 are provided as locked portions on both side surfaces of the display portion 10, respectively.

Since the conductive member 26 is composed of a flexible circuit board, it can be pulled out to the back side of the holding portion 4 through the rectangular hole 28 provided in the base 2.

Although FIG. 1 shows the state where the display unit 10 is pulled out from the holding unit 4, if the display unit 10 is inserted into the holding unit 4, the upper groove 22 or the lower groove is shown. 24 is a ridge
The display unit 10 is stable at the position where it is locked by the unit 20. That is, the display unit 10 has two locked positions in the inner cavity of the holding unit 4.

FIG. 2 is a side view of the LED display module shown in FIG. 1, showing a state in which the lower 24 of the display unit 10 is locked to the protrusion 20 of the holding unit 4. Terminal 8 of soldering terminal 6
Are inserted into the holes of the printed circuit board 30. At this locking position, the display unit 10 does not project to the solder surface 32 side of the printed circuit board 30, so that the printed circuit board 30 can be automatically soldered. A flexible conductive member 26 is soldered to the terminal 8 on the side opposite to the printed circuit board 30.

FIG. 3 is a side view of the LED display module of FIGS. 1 and 2, showing a state where the LED display module is mounted on the printed circuit board 30 and housed in the box 34 of the I / O module of the programmable controller. . Since the ridge 20 is engaged with the groove 22 on the upper stage of the display unit 10, the lower end of the display unit 10 projects toward the solder surface 32 side of the printed circuit board 30, but it is rather better to fit it in the box 34. It is convenient. The front surface of the LED 14 is protected by a transparent cap 36.

For convenience of explanation, FIGS. 2 and 3 are “side views” of the LED display module, but the I / O module itself is
Generally, both side surfaces 38 of the box 34 and the surface of the cap 36 are mounted so that both surfaces are vertical.

In this embodiment, a flexible circuit board is used as the conductive member 26, but an electric wire such as a flat cable (parallel wire) formed by arranging a large number of electric wires in parallel and integrally molding them with a synthetic resin or the like may be used. .

The locking portion and the locked portion are not limited to the combination of the protrusion and the groove, and may be any combination of a convex portion such as a protrusion and a depression and a concave portion having a shape that can be locked to the convex portion. Good.

Further, the locking portion may be provided on any surface of the inner surface of the holding portion forming the inner cavity, and the locked portion may be provided at a position of the display portion that can be engaged with the locking portion. .

It is also possible to implement by providing a convex locked portion on the display portion and a concave locking portion on the holding portion.

Further, it may be implemented by having three or more locking positions.

Although the present invention has been described with reference to the I / O module of the programmable controller as an example, the LED display module of the present invention can be similarly used for other electronic devices.

〔The invention's effect〕

As described above, according to the present invention, when the printed circuit board is soldered, the display unit is locked at the locking position where the display unit does not project to the solder surface side of the printed circuit board, and the soldering work is performed. After the completion, the display part can be slid in the solder surface direction and can be locked at another locking position, so that the printed circuit board can be automatically soldered. Therefore, it is possible to reduce cost and improve reliability.

[Brief description of drawings]

1 is a perspective view of an LED display module according to an embodiment of the present invention, and FIG. 2 is a side view of the LED display module shown in FIG. FIG. 3 shows the I / O of the LED display module of FIGS. 1 and 2.
It is a side view which shows the state accommodated in the box of a module. 2 ... Base 4 ... Holding part 6 ... Soldering terminal part 10 ... Display part 14 ... LED 16, 18 ... Inner side of holding part 20 ... Locking part 22, 24 ... Locked part 26: Flexible conductive member 30: Printed circuit board 32: Solder surface 34: Box 36: Transparent cap

Claims (3)

(57) [Claims] 1. A display unit including a plurality of LEDs, a base body having a substantially U-shaped holding unit capable of slidably holding the display unit and a soldering terminal unit, the display unit and the soldering terminal. A flexible conductive member for connecting the holding section, at least one locking section provided on the inner side surface of the holding section, and a shape capable of engaging with the locking section, and provided on the side surface of the display section. An LED display module, comprising: two or more locked parts, wherein the display part has two or more locked positions in the inner cavity of the holding part. 2. The LED display module according to claim 1, wherein the flexible conductive member is a circuit board having flexibility. 3. The LED display module according to claim 1, wherein the flexible conductive member is a flat cable having flexibility.