JP2009152473A - Fitting structure of light-emitting diode element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily fit an LED element in a fitting hole provided to a case. <P>SOLUTION: A rib 18 for guiding a light emission portion 3a of the LED element 3 to the fitting hole 15 is provided inside a case body 10a of the fitting hole 15. Consequently, when a surface 2a of a printed board 2 where the LED element 3 is fitted is fitted opposite the side of an opening 13 of the case body 10a, the light emission portion 3a of the LED element 3 abuts against the guide rib and slides along the rib to have its moving direction restricted, so that it can be easily inserted into the fitting hole. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a structure for mounting a light-emitting diode element for display on an electronic device.

Light-emitting diodes (hereinafter referred to as LED elements) have low power consumption and heat generation, and have a long life and good visibility. Therefore, they are used as display light sources for recognizing various detection results and operating conditions in many electronic devices. It is used in place of a conventional light bulb. For this reason, as in the prior art, brackets and light guiding lenses (when bending light) are often used, and there has been a problem that assembly costs and parts costs increase.

As one method for solving such a problem, as shown in FIG. 5, a printed circuit board 2 ′ on which an electronic component is mounted is accommodated in a case (housing) 1 whose upper side is opened, and the accommodated printed circuit board 2. The LED element body (light emitting part) 3a attached to the edge of 'is inserted into a mounting hole (window) 4 for display provided on the side wall perpendicular to the fitting direction of the board 2' which is difficult to attach. It is made visible from outside (Patent Document 1).

Therefore, in this case, an inclined surface 6 that rises toward the side wall (or a base portion of a stopper 5 described later is formed in a taper shape) is formed on the bottom wall in the vicinity of the side wall of the case 1 provided with the mounting hole 4. Thus, the LED element body 3a can be easily inserted into the mounting hole 4 on the side wall.

That is, from the opening 7 above the case 1, as shown in FIG. 5, the printed circuit board 2 ′ to which the LED element 3 is attached is directed upward with the surface to which the LED element 3 is attached facing the mounting hole 4 for display. As shown by the dashed line in FIG. The substrate 2 ′ placed in the case 1 is advanced by bringing the end edge into contact with the inclined surface 6. Then, the advanced LED element body (light emitting portion) 3a coincides with the mounting hole 4 on the side wall, and is further advanced and engaged with the stoppers 5 on both sides of the side wall. When engaged in this manner, the LED element body 3a is locked in a state of being inserted into the mounting hole 4. In addition, the printed circuit board 2 ′ thus locked is fixed in its mounting position by fitting a pin of a base (spacer) 8 provided on the bottom wall. In the figure, reference numeral 9 denotes a lid.

JP-A-5-218668

However, in the above, the printed circuit board must be placed in the opening of the case with the surface to which the LED element is attached facing upward, and the position of the printed circuit board must be adjusted while visually observing the LED element on the printed circuit board and the display mounting holes on the side wall. In addition, there is a problem that the shape of the printed circuit board and the case that can use this method is limited. For example, it is difficult to use when the surface to which the LED element is attached must be fitted with the opening side. Even when it can be used, there are the following problems.

That is, since it is necessary to provide an inclined surface and a stopper (or a stopper provided with a taper that replaces the inclined surface) on the bottom wall, it is necessary to greatly change the shape in the case. For this reason, there may be a problem that the inside of the case becomes complicated due to a change in shape, or restrictions are imposed on the components of the board to be attached to the case or its arrangement.

Further, in the above, in order to make the tip of the LED element coincide with the mounting hole for display, the edge of the printed circuit board is brought into contact with the inclined surface of the case (including the taper formed at the base of the stopper) to be advanced. Adjust the position. For this reason, the case has a problem that an extra space for advancing the printed circuit board must be provided.

Moreover, in the above, when the printed circuit board is advanced, if there are switches or terminals (for example, see FIG. 1 of the present application) that are exposed from the case in addition to the LED elements, the printed circuit board has holes for exposing them. There is a problem that it becomes difficult to fit in.

Accordingly, an object of the present invention is to make it possible to easily insert the LED element into the mounting hole when the LED element is attached with the surface to which the LED element is attached facing the opening. At that time, it is possible to insert the LED element into the mounting hole without greatly changing the inside of the case. At that time, the switch can be inserted into the mounting hole of the LED element even if the case has no extra space for advancing the printed circuit board, and the switch and the terminal exposed from the case other than the LED element to the printed circuit board It is to be able to be inserted into the mounting hole of the LED element even if there is.

In order to solve the above problems, in the invention of claim 1, a light emitting diode element comprising a light emitting part and a lead terminal, a printed circuit board on which the lead terminal of the light emitting diode element is soldered, and the light emitting part are inserted. A light emitting diode mounting structure in an electronic device including an electronic device case having a mounting hole is provided, and a configuration including a rib in the vicinity of the mounting hole inside the electronic device case is employed.

By adopting such a configuration, when the printed circuit board is fitted into the opening of the electronic device case with the surface on which the LED element is attached facing the opening side of the electronic device case, the light emitting portion of the LED element is brought into contact with the rib. The traveling direction is regulated to the attachment hole, and the light emitting portion of the LED element can be guided and inserted into the attachment hole.

As described above, by providing the rib on the inner side of the electronic device case, when the surface on which the LED element is mounted is inserted facing the opening side of the electronic device case, the light emitting portion of the LED element first comes into contact with the rib. Furthermore, since it slides along the rib when it is inserted, the light emitting part of the LED element can be inserted into the mounting hole only by inserting the printed board into the electronic device case. Therefore, the LED element can be inserted into the mounting hole without greatly changing the inside of the case, such as providing an inclination on the bottom wall of the case.

In the invention of claim 2, by providing at least one bent portion on the lead terminal of the LED element, when the light emitting portion of the LED element comes into contact with the guide rib provided inside the electronic device case, The bending part absorbs the pressure when sliding along the rib and prevents the soldering part from being damaged by preventing the pressing part from being applied to the soldering part attached to the printed circuit board. it can.

In the invention of claim 3, since the guard is further provided at least on both sides of the rib, it is possible to prevent the light emitting portion of the LED element, which is in contact with the rib and whose traveling direction is restricted, from being detached from the mounting hole direction, so it is more reliable. The light emitting part of the LED element can be inserted into the mounting hole.

Since the present invention is configured as described above, the LED element can be inserted into the mounting hole simply by fitting the printed board into the opening of the case. Therefore, the labor for positioning the LED element and the mounting hole can be saved, and the working efficiency can be improved. In addition, since the rib is only provided inside the mounting hole, the number of parts can be reduced and the cost can be reduced. In addition, it is difficult to assemble, and it can be easily inserted into a mounting hole provided in a direction perpendicular to the printed circuit board on which the LED element is mounted, so that the degree of freedom of layout (design) of the mounting hole and parts can be improved. it can.

The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 shows a wireless charger 10 to which the LED element 3 mounting structure of the present invention is applied.

As shown in FIG. 2, the charger 10 has a structure in which a mounting portion 10 b on which a portable wireless device 12 is placed is formed on an upper portion of a case body 10 a that houses a printed circuit board 2 for a charging circuit. .

The case main body 10a has a structure in which the entire bottom surface is opened as an opening 13, and a metal back cover 14 is screwed to the opened opening 13. A mounting hole 15 is provided on the front surface of the case main body 10a next to the opening 13 to insert and attach the light emitting portion 3a of the LED element 3 for display. That is, as will be described later, the attachment hole 15 is formed in a direction perpendicular to the insertion direction of the printed circuit board 2 fitted in the opening 13, and the attachment hole 15 is formed in the case body 10a as shown in FIG. A small concave portion is provided on the front surface and formed in the concave portion. By doing in this way, the light emission part 3a of the LED element 3 which protrudes from the said attachment hole 15 is protected. Further, a hood-like cover 16 is provided inside the case main body of the attachment hole 15 with the insertion hole 17 on the opening 13 side. The cover 16 is formed in a size that allows the light emitting portion 3a of the LED element 3 to be easily inserted (this hood-like cover 16 corresponds to the guard described in the claims, In the present embodiment, the guard has a hood-like cover shape). As shown in FIGS. 1 and 2, three ribs 18 having a hypotenuse of a right triangle as a curve are provided in parallel on the upper part inside the cover 16 as shown in FIG. 3. As will be described later, the rib 18 guides the light emitting portion 3 a of the LED element 3 that has entered the cover 16 to the mounting hole 15. The three ribs 18 are provided in this way to ensure that the light emitting portion 3a of the LED element 3 that has entered the cover 16 and the ribs 18 are in contact with each other. The number and width of the ribs 18 are as follows. The LED element 3 can be changed according to the size of the light emitting part 3a. Further, the shape of the rib 18 is not limited to the shape in which the hypotenuse of the right triangle is curved as described above. For example, the rib 18 is configured by a right triangle, and the light emitting portion 3a of the LED element 3 is formed by the hypotenuse of the right triangle. Can also be guided to the mounting hole 15.

On the other hand, the mounting portion 10b at the top of the case main body 10a has a shape in which support walls 19 are provided on both sides and the back surface and the front is opened as shown in FIG.

The support wall 19 is formed with positioning protrusions 20 on both sides, and an insertion groove 21 is formed on the back surface, and engages with the radio device 12 to which the protrusion 20 is attached. The charging terminal 22 inserted through the insertion groove 21 is in contact. The insertion groove 21 on the back surface communicates with the lower case body 10a through a through hole 23, and the charging terminal 22 standing on the printed circuit board 2 is inserted as shown in FIG. In the figure, reference numeral 24 denotes a detection switch for detecting that the wireless device 12 is placed on the mounting portion 10b, and reference numeral 30 denotes an AC power connector hole.

The printed circuit board 2 has the same shape a little smaller than the opening 13 of the case main body 10a, and is supported (fixed) by a spacer 25 provided in the case main body. The printed circuit board 2 has a circuit element (not shown) for a charging circuit mounted on the pattern surface 2b, and the LED element 3, the charging terminal 22 and a power supply (AC adapter) adapter port (not shown) on the component surface 2a. 2) The LED switch 3 on which the detection switch 24 is mounted and the LED element 3 on the component surface 2a is soldered to the pattern surface 2b (through the printed circuit board 2), as shown in FIG. It is attached. At this time, by providing a bent portion 26 obtained by bending the lead terminal 3b into an L shape on the bent lead terminal 3b, as will be described later, the soldered portion 27 of the LED element 3 is not stressed. It is. Further, here, the light emitting portion 3a of the LED element 3 is also bent forward to facilitate engagement with the cover 16 and the mounting hole 15 as will be described later.

On the other hand, the charging terminal 22 on the side facing the LED element 3 (the position matching the insertion groove 21 of the case body 10a) is also soldered to the solder surface 2b with one end penetrating the printed circuit board 2 like the LED element 3. It is supposed to stand up.

This form is configured as described above, and the charger 10 of this form has the printed circuit board 2 on which the LED element 3, the charging terminal 22, and the circuit element are mounted in the opening 13 of the case body 10 a. I'm assembling.

For assembly, the pattern surface 2b side of the printed circuit board 2 to which the LED elements 3 are attached is fitted to face the opening 13 side of the case body 10a. Then, the LED element 3 enters the insertion hole 17 of the hood-shaped cover 16 as shown in FIG. Further, when the insertion is continued, as shown in FIG. 4B, the light emitting portion 3a of the LED element 3 comes into contact with the rib 18 at the upper part in the cover 16, and the traveling direction is restricted to the attachment hole. Further, when the printed board 2 is inserted into the opening, the light emitting portion 3a of the LED element 3 faces the mounting hole 15 as shown in FIG. At this time, the pressure from the rib 18 to the light emitting portion 3a of the LED element 3 is applied as indicated by the arrow in FIG. 4C, but the bent portion 26 is bent and absorbed. Therefore, it is possible to relieve stress on the soldering portion 27 to which the lead terminal of the pattern surface 2b of the printed circuit board 2 is attached, and to prevent the soldering portion 27 from being damaged. Thus, since the stress applied to the soldering portion 27 can be prevented, it is possible to prevent the soldering portion 27 from being completely or incompletely disengaged, for example, so as not to cause a lighting failure. The light emitting portion 3a of the LED element 3 is inserted into the mounting hole 15 as shown in FIG. 4D when the printed circuit board 2 is supported by the spacer 25 in the case body 10a. Further, as described above, the light emitting portion 3a of the LED element 3 and the rib 18 come into contact with each other and slide, so that the traveling direction of the light emitting portion 3a of the LED element 3 deviates from the mounting hole 15 depending on the pressure applied to the LED element 3. May end up. However, even if the printed circuit board 2 continues to be fitted into the opening of the case body 10a with the traveling direction deviated, the light emitting portion 3a of the LED element 3 collides with a portion parallel to the rib 18 of the hood-like cover 16 and proceeds. The direction trajectory can be corrected.

In this embodiment, as shown in FIG. 2, the light emitting portion 3a of the LED element 3 is bent forward to facilitate engagement, but depending on the position of the mounting hole 15 and the flexibility of the lead terminal 3b of the LED element 3, Even when it is not bent, it can be guided to the mounting hole 15 only by the guide by the rib 18.

Incidentally, if the length of the lead terminal 3b for inserting the light emitting portion 3a of the LED element 3 into the mounting hole 15 is made slightly longer, the bent portion 26 provided in the lead terminal 3b absorbs at the time of insertion, Accuracy is not required.

At this time, since the charging terminal 22 of the printed circuit board 2 is also inserted through the insertion groove 21 through the through hole 23, the printed circuit board 2 can be inserted into the case body 10a. After that, if the back cover 14 is fitted into the opening 13 and screwed, the assembly is completed.

Thus, the insertion of the LED element 3 into the mounting hole 15 can be performed only by inserting the printed circuit board 2 without the need for alignment. Moreover, since it can insert in the attachment hole 15 of LED element 3 only by inserting the printed circuit board 2 in the opening 13, the extra space for advancing the printed circuit board 2 to the case main body 10a is not required. Furthermore, since the printed circuit board 2 may be inserted into the opening 13, the printed circuit board 2 may have a charging terminal 22 or a detection switch 24 that is exposed from a case other than the LED element 3. Further, since the LED element 3 can be inserted into the mounting hole 15 in a direction perpendicular to the insertion direction of the printed circuit board 2 that is difficult to insert, the layout of the mounting hole 15 and components (for example, LED element, terminal, switch, etc.) ( Design shape can be set freely.

In the present embodiment, the positional relationship in which the printed circuit board 2 and the attachment hole 15 are perpendicular to each other has been described. However, the positional relationship in which the printed circuit board 2 and the attachment hole 15 are perpendicular to each other is not limited. For example, even if the printed circuit board 2 and the mounting hole 15 are in a parallel positional relationship, the rib 18 is not provided in the vertical direction of the soldering portion 27 of the LED element 3 of the printed circuit board 2. Is provided in the vicinity of the mounting hole 15 inside the case main body 10 a, so that the light emitting part 3 a of the LED element 3 can be guided to the mounting hole 15 and can be easily inserted into the mounting hole 15.

Since the present invention simply attaches a printed circuit board and does not require alignment, the LED element can be easily attached to a mounting hole perpendicular to the insertion direction of the printed circuit board 2 that is difficult to insert. It can be used to display various devices other than chargers.

Perspective view of an embodiment Vertical sectional view of the embodiment Cross-sectional view of the main part of the embodiment (A)-(d) Action explanatory drawing of embodiment Vertical section of conventional example

Explanation of symbols

2 Printed circuit board 2a Component surface 2b Pattern surface 3 LED element 3a Light emitting portion 3b Lead terminal 10a Case body 13 Opening 15 Mounting hole 16 Cover 17 Inserting hole 18 Rib 26 Bending portion 27 Soldering portion

Claims (3)

A light emitting diode element comprising a light emitting portion and a lead terminal;
A printed circuit board on which the lead terminals of the light emitting diode elements are soldered;
A light emitting diode mounting structure in an electronic device having an electronic device case having a mounting hole into which the light emitting unit is inserted,
A rib is provided near the mounting hole inside the electronic device case,
When the rib is inserted so that the opening of the electronic device case and the printed circuit board are opposed to each other, the rib contacts the light emitting portion, and restricts the traveling direction of the light emitting portion to the mounting hole, thereby restricting the light emitting portion to the mounting hole. A structure for mounting a light-emitting diode element, characterized by being guided to a mounting hole. 2. The light emitting diode element mounting structure according to claim 1, wherein at least one bent portion is provided on a lead terminal of the light emitting diode element. A guard is further provided at least on both sides of the rib,
3. The light emitting diode element mounting structure according to claim 1, wherein the guard prevents the light emitting portion that is in contact with the rib and whose traveling direction is restricted from being detached from the mounting hole direction.

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