JPH11195859A - Device mounting structure - Google Patents

Abstract

(57) [Problem] To provide an element substrate mounting structure capable of preventing operation of an element in a state where the element is not securely fixed to a mounting substrate. SOLUTION: A mounting substrate 100 provided with two electrode patterns 10-1 and 10-2 around a through hole 103, and a light emitting unit 121 and a base 123 are provided. A light-emitting element 120 provided with two terminals connected to the light-emitting element 120. By inserting the light emitting portion 121 of the light emitting element 120 into the through hole 103 and rotating the base portion 123 by a predetermined angle in a state where the base portion 123 is in contact with the lower surface of the mounting substrate 100, the engaging portion provided on the light emitting element 120 is
The two terminals provided on the upper surface of the base 123 are fixed to the electrode patterns 10-1,
Make contact with 2. One electrode pattern 10-2 is formed in a shape and position in which the light emitting portion 121 does not come into contact with the terminal when the light emitting portion 121 is inserted into the through hole 103, but comes into contact with the terminal only after the light emitting element 120 is rotated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate mounting structure for various devices such as a light emitting device.

[0002]

2. Description of the Related Art Conventionally, in order to illuminate equipment such as various meters mounted on a console box of an automobile at night, a light emitting element has been directly mounted on a mounting substrate fixed to the back side thereof.

FIG. 4 is a perspective view showing a state where a light emitting element 120 is mounted on a conventional mounting board 100 of this kind. The mounting substrate 100 shown in the figure is formed by printing desired circuit patterns (not shown) on the upper and lower surfaces of the hard substrate (only the lower surface is shown in the figure), and mounting electronic components (not shown) at predetermined positions. A through hole 103 is provided at a predetermined position, and the through hole
3, two semicircular electrode patterns 105, 10
5 is formed. The shape of the through hole 103 is
It is circular and has a shape in which two protruding portions 103a, 103a are provided from opposing portions of the outer periphery.

[0004] On the other hand, Fig. 5 is a view showing a light emitting element 120, wherein Fig. 5 (a) is a plan view and Fig. 5 (b) is a side view.
As shown in the figure, the light emitting element 120 has a substantially disc-shaped base 1.
A light emitting unit (functional unit) 121 having a substantially cylindrical shape is attached on the light emitting unit 23.

[0005] On the upper surface of the base 123, two rod-shaped terminals 127, 127 are formed by scratching and winding the wire drawn from the lower surface of the base 123 into the notch 125.

The light emitting section 12 on the upper surface of the base 123
By providing two protrusions 129, 129 having a shape protruding from the base 123 in an inverted L-shape on the outer peripheral surface at the base of the base 1, the engagement portion 13 is formed between the protrusions 129, 129 and the base 123.
0, 130 (only one is shown in the figure).

[0007] The light emitting portion 121 of the light emitting element 120 is inserted into the through hole 103 from the lower surface side of the mounting substrate 100 shown in FIG.
To make the base 123 contact the lower surface of the mounting board 100. At this time, the two protrusions 129, 129 are inserted into the protrusions 103a, 103a, respectively. At this time, the terminals 127 and 127 provided on the upper surface of the base 123 are in contact with the electrode patterns 105 and 105, respectively. By rotating the light emitting element 120 in this state, the engaging portion 13 is rotated.
0 and 130 are engaged and fixed so as to be sandwiched between the inner peripheral side surfaces of the through holes 103.

Here, the connection state between the terminals 127, 127 and the electrode patterns 105, 105 will be described in detail. First, when the base 123 contacts the lower surface of the mounting substrate 100, they come into contact with each other, and FIG. The state shown in FIG. When the light emitting element 120 is rotated and fixed to the mounting board 100, the terminal 1
27, 127 slide on the electrode patterns 105, 105 and move to the position shown in FIG. 6B, where the connection between them is maintained.

Since the light emitting element 120 may be out of ball, the light emitting element 120 is configured to be able to be pulled out from the lower surface side of the mounting substrate 100 and removed when the light emitting element 120 is replaced by rotating in the opposite direction.

[0010]

However, the above-mentioned prior art has the following problems. That is, at the time of assembling the device or replacing the light emitting element 120, the light emitting element 120 was inserted into the through hole 103 in order to attach the light emitting element 120 to the mounting board 100. But sometimes,
Even in such a case, as shown in FIG.
7, 127 are in contact with the electrode patterns 105, 105. When a voltage is applied between the electrode patterns 105, 105 at the time of inspection, the light emitting element 120 is energized and turned on, so that the light emitting element 120 is securely mounted. There was a risk of misunderstanding.

If the device on which the mounting board 100 is mounted subsequently vibrates, the light emitting element 120 is detached from the mounting board 100, resulting in defective lighting.

The present invention has been made in view of the above points, and an object of the present invention is to provide an element substrate mounting structure capable of reliably preventing the operation of the element when the element is not securely mounted on the mounting substrate. Is to do.

[0013]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a mounting substrate having a through hole having a predetermined shape and one or more electrode patterns provided around the through hole on the lower surface thereof. A functional part inserted into the through-hole and a base not shaped to penetrate through the through-hole, provided with one or more terminals connected to the electrode pattern on the base, and engaged with an inner peripheral side surface of the through-hole; A functional part of the element is inserted into the through-hole from the lower surface side of the mounting substrate, and the base is rotated in a state of contacting the lower surface of the mounting substrate, thereby turning on the element. In a substrate mounting structure of an element having a structure in which a joining portion is engaged with and fixed to an inner peripheral side surface of a through hole and the terminal is brought into contact with the electrode pattern, at least one of the electrode patterns is provided with a functional part of the element. Insert into the through hole When the do not abut the terminal, and configured by forming a position abutting the terminal upon rotating the device.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing a substrate mounting structure of a light emitting device according to one embodiment of the present invention. The difference from the conventional example in FIG.
Are only the shapes of the electrode patterns 10-1 and 10-2 formed on the lower surface of. The other parts are denoted by the same reference numerals, and detailed description thereof will be omitted.

That is, in FIG.
The light emitting section 1 of the light emitting element 120 from the lower surface side of the mounting substrate 100
The two protrusions 129 and 129 are inserted into the protrusions 103a and 103a, respectively, by inserting the base 21 into contact with the lower surface of the mounting board 100, and the light emitting element 120 is rotated by rotating the light emitting element 120 in this state. Joint 130,1
30 (see FIG. 5) is engaged with and fixed to the inner peripheral side surface of the through hole 103.

Here, one of the electrode patterns 10-1 and 10-2 on the lower surface of the mounting board 100 is used.
Is formed in an arc shape between the two protrusions 103a, 103a, as in the conventional example, but the other electrode pattern 10-2 is formed only in a range approximately half of the electrode pattern 10-1.

More specifically, the electrode pattern 10-
2 is a light emitting element 120 as shown by a dotted line in FIG.
When the light emitting portion 121 is inserted into the through hole 103 and the base portion 123 is in contact with the lower surface of the mounting board 100, the light emitting portion 121 does not contact the terminal 127 (at this time, the electrode pattern 10-1 contacts the other terminal 127). ), The light emitting element 120 is formed at a position where the light emitting element 120 comes into contact only when the light emitting element 120 is to be rotated and fixed.
That is, when the light emitting element 120 is rotated and fixed, FIG.
As shown in (b), both the electrode patterns 10-1 and 10-2 are in contact with the terminals 127 and 127, and the connection between them is maintained at this position.

That is, according to the present invention, the light emitting element 120
Is inserted into the through-hole 103 in order to attach the light-emitting element 120 to the mounting substrate 100. However, there is a case where the light-emitting element 120 is forgotten to rotate and is left in a fixing failure state. In such a case, FIG. One electrode pattern 10-2 as in a)
And the terminal 127 are not in contact with each other, so that even if a voltage is applied between the electrode patterns 10-1 and 10-2 at the time of inspection, the light emitting element 12
0 is not energized and does not light up, and it can be detected that the attachment is defective.

On the other hand, the light emitting element 120 is rotated to mount the mounting substrate 1.
When fixed to 00, both electrode patterns 10-1 and 10-2 are both connected to terminals 127 and 127 as shown in FIG.

From the above, it is possible to easily find a defective mounting of the light emitting element 120 on the mounting substrate 100.

Incidentally, the shapes of the electrode patterns 10-1 and 10-2 can be variously modified. For example, as shown in FIG.
Both the electrode patterns 10-1 and 10-2 may be formed small so that the terminals 127 and 127 do not abut when the light emitting element 120 is inserted into the through hole 103. The number of electrode patterns may be one or three or more.

The point is that at least one of the electrode patterns is formed at a position where the light emitting element does not come into contact with the terminal of the light emitting element by merely inserting the light emitting element into the through hole of the mounting substrate, but comes into contact only after the light emitting element is rotated. Just do it.

Further, as shown in FIG.
2, a dummy pattern 11 is provided on the same side as the electrode pattern 10-2, and the electrode pattern 10-2 and the dummy pattern 11 are formed into a substantially semicircular arc shape. It may be provided. No circuit pattern is connected to the dummy pattern 11.

With this configuration, the light emitting element 12
When the light-emitting portion 121 of No. 0 is inserted into the through-hole 103, the dummy pattern 11 contacts the terminal 127, and when rotated, the dummy pattern 11 contacts the electrode pattern 10-2. , And 11 are on the same surface, so that the movement of the terminal 127 is smooth, and there is no problem such that the terminal 127 runs off the substrate surface at the end of the electrode pattern 10-2 during the movement.

The element mounted on the mounting substrate 100 is not limited to the light emitting element 120, and may be an element used for various other purposes. In short, it has a functional part inserted into the through-hole of the mounting board and a base that does not penetrate the through-hole. The base has a terminal connected to the electrode pattern provided on the mounting board, and the inner peripheral side surface of the through-hole. Any element may be used as long as it is an element having a structure provided with an engaging portion that engages with.

[0026]

As described in detail above, according to the present invention, the element is not securely fixed to the mounting substrate despite the simple design change of correcting the formation position of the electrode pattern. In the state, there is an excellent effect that the element can be reliably prevented from operating.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a substrate mounting structure of a light emitting device according to an embodiment of the present invention.

FIG. 2 shows terminals 127, 127 and electrode patterns 10-1,
FIG. 4 is an explanatory diagram of a connection process of No. 2;

FIG. 3 is an enlarged view of a main part showing electrode patterns 10-1 and 10-2 having other shapes.

FIG. 4 is a perspective view showing a conventional light emitting element substrate mounting structure.

5A and 5B are diagrams showing a light emitting element 120, FIG. 5A is a plan view, and FIG. 5B is a side view.

FIG. 6 shows terminals 127, 127 and electrode patterns 105, 1
It is explanatory drawing of the connection process of 05.

FIG. 7 is an enlarged view of a main part showing another embodiment.

[Explanation of symbols]

 10-1, 10-2 Electrode pattern 100 Mounting board 103 Through hole 120 Light emitting element (element) 121 Light emitting section (functional section) 123 Base 127 Terminal 130 Engaging section

Claims (1)

[Claims] 1. A mounting board having a through hole of a predetermined shape and one or more electrode patterns provided around the through hole on the lower surface thereof, a functional part inserted into the through hole, and not penetrating the through hole. A base having a shape, and an element having at least one terminal connected to the electrode pattern on the base and an engaging portion engaging with an inner peripheral side surface of the through hole. The functional portion is inserted into the through hole from the lower surface side of the mounting substrate, and the base portion is rotated while being in contact with the lower surface of the mounting substrate, so that the engaging portion is engaged with the inner peripheral side surface of the through hole and fixed. And a substrate mounting structure for an element having a structure in which the terminal is brought into contact with the electrode pattern, wherein at least one of the electrode patterns does not come into contact with the terminal when the functional part of the element is inserted into the through hole. , When the element is turned A substrate mounting structure for an element, wherein the substrate mounting structure is formed at a position where the element contacts an element.