JPH05183190A - LED fixing structure in display device - Google Patents

Abstract

(57) [Abstract] [Purpose] An object is to provide an LED fixing structure capable of preventing unclear display and erroneous display. [Structure] Surface plates 19 and 2 having a plurality of display windows 21a
A plurality of L's each having a printed circuit board 11 arranged to face the back surface of 1 and having leads protruding toward the base end side of the substantially cylindrical light emitting part.
In a display device in which the ED 12 is mounted on the printed circuit board 11 such that the front end of the LED 12 is close to the display window 21a, the LED 12 is inserted through a spacer member 13 having a hole through which a lead of the LED 12 passes. Then, the light emitting portions of the LEDs 12 are mounted on the printed circuit board 11 in a state of being floated from the printed circuit board 11, respectively.
The substantially plate-shaped support member 18 having a plurality of through holes 18a for inserting / holding the tip portion of the D12 is attached to the surface plates 19 and 21.
And the printed circuit board 11 are interposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to LE for display devices.
D fixing structure. An electronic device such as a communication device is provided with a display device in which lamps and the like are arranged in order to allow a maintenance person, an operator, and the like to recognize an operating state of the device, a setting state of a switch, and the like. As a lamp, low power,
LEDs (light emitting diodes) are often used for reasons such as low heat generation.

The LEDs are generally mounted and fixed directly on a printed circuit board arranged on the back side of the front plate (panel forming a part of the apparatus housing), but for the convenience of design, etc.
There are cases where it is desired to mount the LED in a state of floating from the printed circuit board, and in this case, it is desired to provide an effective LED fixing structure.

[0003]

2. Description of the Related Art FIG. 4 is an exploded perspective view showing the overall construction of the prior art, and FIG. 5 is a sectional view showing the construction of the main part of the same.

In FIG. 1, reference numeral 1 is a sub board (printed circuit board), and a plurality of LEDs 2 having a pair of protruding leads on the base end side of a light emitting portion formed in a substantially columnar shape on the sub board 1, Connector 3, other parts (not shown)
Has been implemented. Reference numeral 4 denotes a main body board (printed circuit board) on which connectors 5, 6 and other components are mounted.

Reference numeral 7 denotes a surface plate (front panel) which constitutes a part of the apparatus housing, and the surface plate 7 has through holes 7a, 7a. The main body board 4 is fixed to the mounting portion 7b of the surface plate 7 with screws 8. On the front surface side of the surface plate 7, a label 9 having a film-like member formed by printing letters 9 9 8 9 a showing the meaning of the display window 9 a and the display window 9 a for transmitting the light from the LED 2 is attached. Has been done. The sub board 1 is fixed by screws 11 and 11 from both sides in a state in which a plurality of spacing bolts 10 are provided on a surface plate 7.

A plurality of LEDs mounted on the sub board 1
2 are arranged close to each other in a state corresponding to the display windows 9a of the label 9, respectively, to prevent light from reaching the display windows other than the corresponding display windows 9a, or the relation of the light emission amount of the LED 2. From desirable. However, due to the design of the sub board 1 and the main board 4, for example, L on the sub board 1
The sub-board 1 is separated from the surface plate 7 due to reasons such as mounting a relatively high-level component on the ED2 mounting side and the mounting position of the connector 5 on the main board 4 being restricted by other mounting components. In some cases, it is necessary to arrange the LEDs as shown in FIG.
This is dealt with by fixing the lead 2 to the sub board 1 by soldering the lead 2 while it is floating from the sub board 1.

[0007]

However, since the leads of the LED are deformed even when a slight external force is applied, the posture of the LED is unstable and tends to vary, and another display adjacent to the corresponding display window is displayed. There is a problem that light may leak to the window and result in erroneous display or unclear display, and information may not be properly transmitted to an operator or the like.

Further, there is a problem that it is difficult to position the LED calling portion in the height direction when the LED is mounted, and the brightness differs between the display windows. The present invention has been made in view of the above circumstances, and can prevent the unclear display and the erroneous display by determining the attitude of the LED while the light emitting portion of the LED is floated from the printed circuit board. LE capable of
The purpose is to provide a D-fixing structure.

[0009]

In order to achieve the above-mentioned object, a printed circuit board is arranged so as to face the back side of a front plate having a plurality of display windows, and projects toward the base end side of a substantially cylindrical light emitting section. In a display device in which a plurality of LEDs each having a lead are mounted on the printed circuit board so that the LED tips are close to the display window, the display device is configured as follows.

That is, the LED is mounted on the printed circuit board in a state where the light emitting portions of the LED are respectively floated from the printed circuit board through a spacer member having a hole through which the lead of the LED passes. A substantially plate-shaped supporting member having a plurality of through holes for inserting and holding the tip portion is interposed between the surface plate and the printed board.

[0011]

According to the present invention, since the LED is mounted on the printed board through the spacer member, the lead of the LED is reinforced by the spacer member, the bending of the lead is reduced, and the height direction of the spacer member is reduced. Since the distance between the light emitting portion of the LED and the printed circuit board is determined by the dimension, variation in the height direction among the LEDs is reduced.

Further, since the tip of the LED is held by the supporting member, the attitude of the LED can be kept constant and the positional relationship with the corresponding display window can always be optimized. Even if an external force acts on the LED after the LED is mounted, its posture hardly changes.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing an overall configuration of an embodiment of the present invention, FIG. 2 is a sectional view showing a configuration of an essential part, and FIG. 3 is a perspective view showing a configuration of an LED and a spacer member.

In FIG. 1, reference numeral 11 denotes a sub board (printed circuit board). On the sub board 11, a plurality of LEDs 12 having a pair of protruding leads are provided on the base end side of a light emitting portion formed in a substantially columnar shape. They are mounted in an array via the spacer members 13, respectively. The spacer member 13 is made of a cylindrical metal or a heat-resistant resin, and the leads of the LED 12 are inserted into the spacer member, and the spacer member 13 is sandwiched between the end face of the LED 12 on the base end side and the sub board 11. The leads are soldered and fixed to the sub board 11. A connector 14 and other components are mounted on the sub board 11.

Reference numeral 15 denotes a main body board (printed circuit board) on which connectors 16, 17 and other parts are mounted. Sub board 11 is connector 1
4 by fitting the connector board 16 into the main board 15
Implemented on. 18 is a support metal fitting made of sheet metal,
The LE mounted on the sub board 11 is mounted on the support bracket 18.
Insert the tip of LED12 into the position corresponding to D12.
A plurality of through holes 18a for holding are formed. The through hole 18a is formed in a tapered shape so that the side into which the LED 12 is inserted is wide and the opposite side is narrow. The support fitting 18 has a mounting portion 18b, and is set so that the portion where the through hole 18a is formed has a predetermined distance from the subboard 11 in a state where the mounting portion 18b is in contact with the subboard 11. Has been done.

Reference numeral 19 denotes a surface plate (front panel) which constitutes a part of the housing of the apparatus, and the surface plate 19 has a plurality of through holes 1.
9a. The main body board 15 is fixed to the mounting portion 19b of the surface plate 19 with screws 20.

On the surface side of the surface plate 19, a label 21 is formed by printing a display window 21a through which light from the LED 12 is transmitted through a film-shaped member and letters, symbols, figures, etc., which indicate the meaning of the display window 21a. Is attached. The support bracket 18 is arranged on the sub-board 11 such that the tip of the LED 12 is inserted into each through hole 18a, and a plurality of spacing bolts 22 are interposed between the surface plate 19 and the mounting portion 18b of the support bracket 18, and both sides The screws 23 are screwed together to be integrally fixed.

According to this embodiment, since the LED 12 is mounted on the sub-board 11 via the cylindrical spacer member 13, the lead of the LED 12 is reinforced by the spacer member 13 and bending of the lead is reduced. The size of the spacer member 13 in the height direction determines the distance between the light emitting portion of the LED 12 and the sub board 11, so that there is little variation in the height direction among the LEDs 12.

Further, since the tip of the LED 12 is held by the support member 18, even if the attitude of the LED 12 is slightly varied, this is corrected and the positional relationship most suitable for the display window 21a of the label 21 is obtained. can do. Further, in this embodiment, the through hole 18a of the support fitting 18 is tapered so that the side into which the LED 12 is inserted is wide and the opposite side is narrow.
The position is corrected smoothly.

When the spacer member 13 is made of metal, at least the inside thereof is preferably covered with an insulating material. Further, when the spacer member 13 is formed of resin, it is preferable to use a heat-resistant material so that the spacer member 13 is not deformed by the heat when the LED 12 is soldered and fixed onto the sub board 11. ..

[0021]

Since the present invention is configured as described above in detail, the attitude of the LED can be determined in a state where the light emitting portion of the LED is floated from the printed circuit board, and therefore the LED and the corresponding display window can be defined. The positional relationship can always be kept optimum, and the effect of reducing unclear display and erroneous display can be obtained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing the overall configuration of an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the configuration of the main part of the embodiment of the present invention.

FIG. 3 is a perspective view showing a configuration of an LED and a spacer member according to an embodiment of the present invention.

FIG. 4 is an exploded perspective view showing an overall configuration of a conventional technique.

FIG. 5 is a cross-sectional view showing a configuration of a main part of a conventional technique.

[Explanation of symbols]

 11 Sub Board 12 LED 13 Spacer Member 15 Main Board 18 Supporting Metal Fitting 18a Through Hole 19 Surface Plate 21 Label 21a Display Window

Claims (1)

[Claims] 1. A surface plate (1) having a plurality of display windows (21a).
The printed circuit board (11) is arranged on the back side of the (9, 21) so as to face each other, and the LED (12) has a plurality of LEDs (12) each having a lead protruding toward the base end side of the light emitting portion. The display window (21a)
In a display device mounted on the printed circuit board (11) so as to be close to the LED (12), via a spacer member (13) having a hole through which the lead of the LED (12) passes, The light emitting parts of the LEDs (12) are mounted on the printed circuit board (11) in a state of being respectively floated from the printed circuit board (11), and a plurality of through holes (1) for inserting and holding the tip parts of the LEDs (12) are provided.
8a) having a substantially plate-shaped support member (18), the surface plate (19,
An LED fixing structure characterized by being interposed between the printed circuit board (11) and the printed circuit board (21).