JPH07297507A - Printed circuit board - Google Patents

Abstract

PURPOSE:To prevent disconnection and to improve reliability by providing a part wherein external force is applied to a specified position and by forming a pattern wiring in an area near the part of an electric wire. CONSTITUTION:A printed circuit board 5 is provided with a part 1 wherein external force is applied to a specified position and a pattern wiring in an area near the part 1 is formed of an electric wire 2. That is, the part 1 wherein external force is applied is made a division line which divides the printed circuit board 5 after mounting of the part and the division line is formed to divide a corner edge part 3 which is a dummy part of the square printed substrate 5. Therefore, when external force is actually applied to the part 1 whereto external force is applied, the printed circuit board 5 is elastically deformed due to the external force; however, since a pattern wiring in an area near the part 1 whereto external force is applied is formed of the electric wire 2, disconnection of a copper foil, etc., can be prevented. Furthermore, since the electric wire 2 is not disconnected due to external force such as impact applied during division of the printed circuit board 5, product defective can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board on which a lighting circuit for a ring fluorescent lamp is mounted.

[0002]

2. Description of the Related Art As shown in FIGS. 4 and 5, an annular fluorescent lamp is a lamp holder having a printed circuit board 51 fixed to a center of a disc-shaped instrument body 50 by a mounting portion 52 and a lamp socket around the printed circuit board 51. 53 and a lamp support spring 54 are provided, and the printed board 51 is covered with a cover 55. 6
Reference numeral 1 is a ring-shaped fluorescent lamp supported by a lamp holder 53 and a lamp support spring 54.

It is desirable that the printed board 51 be at least close to a disk shape in accordance with the shape of the cover 55 and the like in order to secure a large area. On the other hand, the printed circuit board 51 is subjected to characteristic inspection by a process inspection machine after mounting and soldering the components. This inspection is usually performed by the belt conveyor 56 while guiding both sides of the printed circuit board 51 by the guides 59 as shown in FIG. It is transported and inspected item by item.

In order to smoothly carry the material by the belt conveyor 56, the printed circuit board 51 having a disk shape has a waste board called a dummy section 57 in the peripheral portion of the board so as to secure a board space on the belt conveyor 56 for carrying. After completion of the final inspection, the dummy part 57 is cut by hand or machine to remove the corner edge of the square printed board 51 and shipped in the final board shape.

Then, the dummy portion 57 and the printed circuit board 51
As shown in the figure, the connecting portion with and is provided with perforations 58 for easy splitting.

[0006]

However, as shown in FIG. 7, when the dummy part 57 is broken, the copper foil pattern 60 near the dummy part 57 of the printed circuit board 51 may be peeled off and damaged. If the pattern of the final inspection product is damaged in this way, the mounted printed circuit board cannot be used, resulting in a large loss.

On the other hand, the dummy portion 57 and the perforation 5
Although this problem can be avoided if the pattern wiring is performed at a sufficient distance by means of No. 8, it is difficult to realize the present situation because of the demand for downsizing and high-density design of the printed circuit board. Such a problem also applies to the fixed portion of the printed circuit board 51 fixed by the mounting portion 52, and an external force is applied to the fixed portion of the printed circuit board 51 at the time of mounting, so that the pattern wiring in the vicinity of the fixed portion may be broken. .

Therefore, an object of the present invention is to provide a printed circuit board capable of preventing the copper foil from breaking in the vicinity of a portion to which an external force is applied.

[0009]

A printed circuit board according to a first aspect of the present invention is characterized in that a portion to which an external force is applied is provided at a predetermined position, and a pattern wiring near this portion is formed by an electric wire. In the printed circuit board of No. 2, in the first aspect, the portion is a dividing line that divides the printed circuit board.

A printed circuit board according to a third aspect of the present invention is the printed circuit board according to the second aspect, wherein the dividing line divides a square edge portion of the rectangular printed circuit board. A printed circuit board according to a fourth aspect of the present invention is the printed circuit board according to the first aspect, wherein the portion serves as a fixed portion of the printed circuit board that is fixed by being fixed to the mounting portion of the mounted body.

[0011]

According to the printed circuit board of the first aspect, when the external force is actually applied to the portion to which the external force is applied, the printed circuit board is elastically deformed by the external force, but the pattern wiring near the portion to which the external force is applied is formed by the electric wire. Therefore, it is possible to prevent disconnection such as copper foil, and it is possible to provide a highly reliable printed circuit board.

According to the printed circuit board of the second aspect, in the first aspect, since the portion is a dividing line for dividing the printed circuit board, in addition to the function of the first aspect, the impact force or the dividing line applied when the printed circuit board is divided. Since the electric wire is not broken by an external force that causes peeling on the surface of the printed circuit board, product defects can be reduced. According to the printed circuit board of the third aspect, in the second aspect, the dividing line is formed so as to divide the corner edge portion of the quadrangular printed circuit board. Since the steps of mounting the components, soldering them, and further inspecting can be performed in the shape of a rectangular printed board, workability is good, and since there is no disconnection even after cutting after the inspection, the number of defective products can be reduced.

According to the printed circuit board of the fourth aspect, in the first aspect, since the portion is the fixed portion of the printed circuit board which is pressed and fixed to the mounting portion of the mounted body, the printed circuit board has the function of the first aspect. It is possible to prevent the pattern wiring in the vicinity of the fixing portion from being broken by an external force applied to the fixing portion when fixing the.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. That is, this printed circuit board 5 is provided with a portion 1 to which an external force is applied at a predetermined position, and the pattern wiring near the portion 1 is formed by the electric wire 2. In the embodiment, the portion 1 to which the external force is applied is a dividing line that divides the printed circuit board 5 that is divided after the components are mounted, and the dividing line is the corner edge portion 3 that is a dummy part of the rectangular printed circuit board 5.
It is formed so as to divide.

The dividing line which is the portion 1 is formed by slit-shaped notches 6 at both ends, and perforations 7 are formed between the notches 6. Further, the electric wire 2 is to be laid substantially parallel to the parting line, and a jumper wire such as annealed copper wire is used as an example.
A hole 10 is formed in the substrate in the vicinity of the ends of the copper foil patterns 8 and 9 where the electric wire 2 is wired, and both ends of the electric wire 2 are inserted from the component mounting surface side of FIG. Connected to the copper foil patterns 8 and 9.

According to this embodiment, the portion 1 to which an external force is applied
When an external force is actually applied to the printed circuit board 5, the printed circuit board 5 is elastically deformed by the external force, but since the pattern wiring in the vicinity of the portion 1 to which the external force is applied is formed by the electric wire 2, a disconnection such as a copper foil is prevented. Therefore, a highly reliable printed circuit board can be provided. In addition, since the portion 1 is formed as a disconnection line that divides the printed circuit board 5, the electric wire 2 is not disconnected due to an impact force applied when the printed circuit board 5 is divided or an external force that causes peeling on the surface of the printed circuit board 5 from the division line. Can be reduced. Further, a corner edge portion 3 which is a dummy portion of the printed circuit board 5 having a quadrangular dividing line
Since it is formed so as to divide the
The workability is good because the process of mounting the components on, soldering and further inspecting can be performed with the shape of the rectangular printed board 5.
In addition, since there is no disconnection even after the inspection, the number of defective products can be reduced.

A second embodiment of the present invention is shown in FIG. That is, in this printed circuit board 5, the portion 1 is attached to the mounted body 11
The fixed portion of the printed circuit board 5 is fixed to the mounting portion 12 of FIG. The mounted body 11 is an insulating plate or case of the instrument body as an example, and the mounting portion 12 is a fixed claw as a working example. When mounting the printed circuit board 5 on the mounted body 11, the mounting portion 12 is mounted at the edge of the printed circuit board 5. Elastically retracted, and the printed circuit board 5 is mounted on the mounted body 11 with the mounting portion 12
The claws 12a are returned and locked to the portion 1 which is the fixed portion.
The same parts as those in the first embodiment are designated by the same reference numerals.

According to this embodiment, when the printed circuit board 5 is mounted, the printed circuit board 5 is passed over the mounting portion 12.
There is a possibility that the part 1 is elastically deformed, or the side surface of the printed board 5 is caught by the claws 12a, an external force is applied to peel off the surface of the printed board 5, and the copper foil is broken. Since the pattern wiring is formed by the electric wire 2 in the vicinity of the portion 1, disconnection can be prevented.

Moreover, since the locking position of the claw 12a of the mounting portion 12 can be located on the wiring position of the electric wire 2 on the pattern wiring side opposite to the component mounting side for wiring the electric wire 2, the space for the printed circuit board 5 is reduced. It can be used effectively.

[0020]

According to the printed circuit board of claim 1, when an external force is actually applied to a portion to which the external force is applied, the printed circuit board is elastically deformed by the external force. Because it is formed by
It is possible to prevent disconnection such as copper foil and to provide a highly reliable printed circuit board.

According to the printed circuit board of the second aspect, in the first aspect, since the portion is a dividing line that divides the printed circuit board, in addition to the effect of the first aspect, the impact force and the dividing line applied when the printed circuit board is divided. Since the electric wire is not broken by an external force that causes peeling on the surface of the printed circuit board, product defects can be reduced. According to the printed circuit board of claim 3, in the circuit board according to claim 2, the dividing line is formed so as to divide a corner edge portion of the rectangular printed circuit board. Since the steps of mounting the components, soldering them, and further inspecting can be performed in the shape of a rectangular printed board, workability is good, and since there is no disconnection even after cutting after the inspection, the number of defective products can be reduced.

According to the printed circuit board of claim 4, the printed circuit board according to claim 1 is characterized in that the portion is a fixed portion of the printed circuit board that is pressed and fixed to the mounting portion of the mounted body. It is possible to prevent the pattern wiring in the vicinity of the fixing portion from being broken by an external force applied to the fixing portion when fixing the.

[Brief description of drawings]

FIG. 1 is a back view showing a pattern wiring side according to a first embodiment of the present invention.

FIG. 2 is a front view showing the component mounting side.

FIG. 3 is a partial perspective view of the second embodiment.

FIG. 4 is a cross-sectional view showing a state in which the printed circuit board is attached to the ring fluorescent lamp fixture.

FIG. 5 is a bottom view with the cover removed.

FIG. 6 is a partial plan view showing a carrying process for mounting components on a printed circuit board.

FIG. 7 is a partial view of a printed circuit board on a copper foil pattern side.

[Explanation of symbols]

 1 part 2 electric wire 3 corner edge

Claims (4)

[Claims] 1. A portion for applying an external force is provided at a predetermined position,
A printed circuit board, characterized in that the pattern wiring near this portion is formed by an electric wire. 2. The printed circuit board according to claim 1, wherein the portion is a dividing line that divides the printed circuit board. 3. The printed circuit board according to claim 2, wherein the dividing line is formed so as to divide a corner edge portion of the rectangular printed circuit board. 4. The printed circuit board according to claim 1, wherein the portion is a fixed portion of the printed circuit board that is pressed and fixed to the mounting portion of the mounted body.