JPH0837348A - Reinforcing aids of printed wiring board and reinforcement structure - Google Patents

Abstract

PURPOSE:To provide reinforcing aids without constraining a design of a printed wiring board. CONSTITUTION:A plurality of sticking parts 7 equipped with a mounting mechanism 12 for mounting on a printed wiring board 1 are catenated by a reinforcing part 8. A reinforcing aid 6. forming a gap 11 by partially cutting off the reinforcing part 8, which is between the fixing parts 7, is stuck to the printed wiring board 1, which is arranged with wiring of a pattern 3 and a part 5, at a position other than a range in contact with the sticking parts 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing tool and a reinforcing structure for a printed wiring board to which electronic parts are attached.

[0002]

2. Description of the Related Art A conventional printed wiring board reinforcing structure is shown in FIG.
It will be explained based on. In FIG. 9, the printed wiring board 20
On the substrate 23 on which the pattern 21 and the via 22 are formed,
Although the component 24 is mounted and configured, the printed wiring board 2 may have a large size of the board 23 or a heavy component 24.
When 0 itself becomes heavy, the printed wiring board 20 may warp and cause damage.

For this reason, the reinforcing tool 25 is fixed to the surface of the printed wiring board 20 by the mounting screws 26 to prevent the printed wiring board 20 from warping. Since the reinforcing tool 25 is created with the purpose of supplementing the strength of the printed wiring board 20 as a top priority, the entire bottom surface is in contact with and fixed to the printed wiring board 20, which is satisfactory in terms of strength. It was

[0004]

However, the printed wiring board 2 to which the reinforcing tool 25 as described above is usually attached is usually used.
0 is a high-density one in which the number of mounting points of the component 24 is large and the mounting region and the wiring region are fully used. On the other hand, in the conventional reinforcing structure of the printed wiring board 20, first, the component placement is performed. When designing, in addition to the constraints and conditions that arise from the circuit diagram and the manufacturing method, the placement of the reinforcing tool 25 must be considered in consideration of the part to be mounted. In other words, this means reduction of the component mounting area, which may cause problems such as an increase in the size of the printed wiring board 20 and a circuit change at the design stage.

In addition, since a metal is often used as the material of the reinforcing tool 25 during wiring design, a short circuit may occur between the reinforcing tool 25 and the pattern 21 arranged below the reinforcing tool 25. Pattern 21 via 22
The wiring of the pattern 21 under the reinforcing tool 25 is taken as little as possible, such as switching to the back side by wiring or making a detour to carry out wiring. Furthermore, when the printed wiring board 20 is manufactured, insulation is performed. Work such as stretching the sheet 27 on the printed wiring board 20 has to be performed.
As a result, these measures increase the number of vias 22 and the length of the pattern 21 as well as increasing the number of working steps, which may impair the function of the printed wiring board 20 itself.

The present invention solves the above problems, and a first object of the present invention is to provide a reinforcing tool for a printed wiring board which does not restrict the design of the printed wiring board. is there.

A second object of the present invention is to provide a reinforcing structure for a printed wiring board which does not deteriorate the functionality of the printed wiring board itself.

[0008]

In order to achieve the above first object, the invention according to claim 1 is a reinforcing tool which is fixed to the surface of a printed wiring board to supplement the strength of the printed wiring board. A plurality of fixing portions having an attachment mechanism for attaching to the printed wiring board are connected by a reinforcing portion, and the reinforcing portions between the fixing portions are partially cut off to form a gap portion. .

Preferably, the reinforcing portion is composed of a plate-shaped connecting portion and a reinforcing bent portion formed by bending an upper end of the connecting portion, and the connecting portion connects the fixing portion, and the connecting portion. You may form a gap part in it.

Further, preferably, a prism is used as the reinforcing portion, one side of the prism is partially cut off to form the gap portion, and a portion left on the one side is used as the fixing portion. Good.

More preferably, the attachment mechanism may be provided at three or more places on the reinforcing tool.

In order to achieve the above second object, the present invention provides a plurality of fixing portions provided with a mounting mechanism for attaching to a printed wiring board, a reinforcing portion connecting the fixing portions, and a space between the fixing portions. A reinforcing tool composed of a gap part formed by partially cutting off the reinforcing part was fixed to a printed wiring board on which pattern wiring and component placement were provided, at a position other than a range in contact with the fixing part. It is characterized by

[0013]

With such a structure, in the reinforcing tool according to the present invention, when the reinforcing tool is fixed to the surface of the printed wiring board, only the fixing portion comes into contact with the surface of the printed wiring board, and the gap Since a space is formed between the reinforcing portion and the printed wiring board by the portion, the reduction of the component mounting area on the surface of the printed wiring board can be minimized.

Further, in the reinforcing structure according to the present invention,
By arranging a pattern on the surface of the printed wiring board under the gap and mounting the component, it becomes possible to arrange the component and the pattern wiring in accordance with the circuit diagram, shorten the pattern length, and reduce the number of vias. be able to.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A printed wiring board reinforcing tool and a reinforcing structure according to the present invention will be described below with reference to the drawings. 1 is a perspective view of a reinforcing structure for a printed wiring board according to the present invention, and FIG. 2 is a perspective view of a first embodiment of a printed wiring board reinforcing tool according to the present invention. In FIG. Forms a pattern 3 and a via 4 on the surface of the substrate 2,
The component 5 is mounted on the substrate 2, and
A reinforcing tool 6 ₁ is attached to the surface of the printed wiring board 1 to supplement the strength.

As shown in FIG. 2, the reinforcing tool 6 ₁ has a plurality of fixing portions 7 for mounting on the surface of the printed wiring board 1 and one end portions of these fixing portions 7 are connected by a reinforcing portion 8. Reference numeral 8 is composed of a connecting portion 9 which is vertically connected to one end of the fixing portion 7 and a reinforcing bending portion 10 formed by bending the upper end of the connecting portion 9, and between the fixing portions 7. A gap portion 11 is formed by partially removing the connecting portion 9.

A screw hole 12a is formed in the center of the fixing portion 7, and a mounting screw 12b is screwed into the screw hole 12a to form a mounting mechanism 12 for the printed wiring board 1.

Regarding the shape and the number of the fixing portions 7 and the screw diameter of the mounting screws 12b, it is sufficient to select the values required for the target printed wiring board 1, but it is possible to print depending on the number of the fixing portions 7. Since the strength exerted on the wiring board 1 as a whole also changes, in order to provide certainty, the fixing portion 7 is formed so that three or more screw holes 12a can be arranged at substantially equal intervals over the entire length of the reinforcing tool 6 _1. There is.

The gap portion 11 is a portion formed to provide a space between the reinforcing tool 6 ₁ and the printed wiring board 1, and the size of the gap portion 11 and the like are designed in the printed wiring board 1. At the stage, the upper limit value of the height of the printed wiring board 1 and the gap portion 11 required for mounting the component 5
Value after examining the, it determines the size by intensity required for the reinforcing tool 6 _1.

The reinforcing bent portion 10 is a portion molded to maintain the strength of the reinforcing tool 6 ₁ . The reinforcing tool 6 ₁ which has become weaker by providing the gap 11
And is an important part for giving the necessary strength to the printed wiring board 1 to be attached. Therefore, it is necessary to sufficiently consider the shape, the number of bendings, etc., but three points 10 as shown in FIG.
The shape bent at a, 10b, and 10c becomes the most basic shape.

Further, the four portions having the screw diameters of the fixing portion 7, the gap portion 11, the reinforcing bending portion 10, and the mounting screw 12b are fixed portions when the height of the gap portion 11 is high. If the number of 7 is increased and the width of the gap portion 11 is narrowed and the width of the gap portion 11 is increased, the number of bends of the reinforcing bending portion 10 is increased and the height of the gap portion 11 is decreased to keep the strength close. Is related to.

Next, the reinforcing tool 6 ₁ constructed as described above.
The operation of will be described. Parts 5 on the surface of printed wiring boards
If the wiring of implementation and the pattern 3 extends to the mounting position of the reinforcing tool _61, by positioning the gap 11 to the upper portion of the wiring region of the mounting area and the pattern 3 of the component 5, the component 5 and the pattern 3 The reinforcing tool 6 ₁ can be attached to the printed wiring board 1 without interference.

[0023] Therefore, in the creation stage reinforcing tool 6 ₁ Conversely, if you create a gap 11 and the fixing unit 7 considering wiring mounting or pattern 3 of the component 5 in the lower portion of the printed wiring board 1 surface, The degree of freedom in designing the printed wiring board 1 is not impaired.

Next, a reinforcing structure for a printed wiring board according to the present invention will be described with reference to FIGS. 1, 3 and 4.

[0025] In the reinforcing structure of a printed wiring board according to the present invention, by contacting the fixing portion 7 of the reinforcing tool ₆₁ on the surface of the printed wiring board 1, screwed mounting screws 12b into the screw hole 12a of the fixing portion 7 Printed wiring board 1
The reinforcing tool 6 ₁ is fixed to the
The total length of the reinforcing tool ₆₁ to substantially since equally spaced three screw holes 12a are formed, the reinforcing tool ₆₁ is supported at both ends and the central portion of the printed wiring board 1, the printed wiring board 1 It is designed to prevent warpage.

Since the reinforcing tool 6 ₁ has the gap 11 formed therein, a space is formed between the reinforcing tool 6 ₁ and the printed wiring board 1.
As shown in FIG. 3, the component 5 can be mounted on the surface of the printed wiring board 1 below the gap 11. Therefore, in the printed wiring board 1, the layout design of the component 5 is performed in accordance with the circuit diagram without being restricted by the mounting area of the reinforcing tool 6 ₁ at the stage of designing the layout of the component 5. Further, as the arrangement of the components 5 is improved, as shown in FIG. 4, the wiring of the pattern 3 can be directly connected between the components 5 with the shortest distance, and the length of the pattern 3 can be shortened. .

Further, since the contact portion of the reinforcing tool 6 _{1 with} the printed wiring board 1 is limited to only the fixing portion 7, an insulating sheet (not shown) is stretched or the pattern 3 is diverted to the back side by the via 4. It is not necessary to take such measures.

Next, another embodiment of the reinforcing tool for a printed wiring board according to the present invention will be described with reference to FIGS. 5 to 8. The same constituents as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. To do.

FIG. 5 is a perspective view of a second embodiment of the reinforcing tool of the printed wiring board according to the present invention, the notch portion of the connecting portion 9 to form a gap portion 11 of the reinforcing tool 6 ₂ 5 9a is rounded, and the corners of the reinforcing bent portion 10d are rounded.

[0030] In the second embodiment having the above structure has the same effect as the first embodiment, further strengthening of the reinforcing tool 6 ₂ itself.

FIG. 6 is a perspective view of a third embodiment of a reinforcing tool for a printed wiring board according to the present invention. In FIG. 6, the gap portion 11a provided in the reinforcing tool 6 ₃ is limited to only a necessary portion. Then formed. The anchoring portion 7b is different from the fixing portion 7a sizes provided on both sides of the gap portion 11a, these, the fixing portion 7b, forms a plurality of screw holes 12a, etc. to the entire length of the reinforcing tool 6 ₃ Attachment mechanism at intervals 12
To prevent the printed wiring board 1 from being unevenly reinforced.

The third embodiment of the above construction is the arrangement of the parts 5 on the surface of the printed wiring board, the wiring of the pattern 3 and the reinforcing tool 6.
₃ overlap the mounting position of, there is particularly effective when it is limited to a portion of narrow space, the same effect can be obtained with the first embodiment, furthermore, the gap provided in the reinforcing tool 6 ₃ since forming by limiting only the parts 11a to necessary portions, while reducing the number of steps during production of the reinforcing tool 6 _3, it is possible to increase the strength.

FIG. 7 is a perspective view of a fourth embodiment of a reinforcing tool for a printed wiring board according to the present invention. In FIG.
Reinforcing bent portion of the reinforcing tool 6 ₄ to the fixing portion 7c, are formed in the opposite direction.

The fourth embodiment having the above-mentioned structure is effective when the reinforcing tool 6 ₁ shown in FIG. 1 is used and the reinforcing bending portion 10 and the component 5 mounted in the vicinity thereof collide with each other. By using this reinforcing tool 6 ₄ , the same effect as that of the reinforcing tool 6 ₁ can be obtained without causing the reinforcing bent portion 10 and the component 5 to interfere with each other.

[0035] FIG. 8 is a perspective view of a fifth embodiment of the reinforcing tool of the printed wiring board according to the present invention, the reinforcing tool 6 ₅
The prism A is used as the reinforcing portion 8 of the above, and a gap 11 is formed by cutting a part of the prism A from one side of the prism A, and the remaining portion on the one side is used as the fixing portion 7d.

[0036] In the fifth embodiment having the above structure has the same effect as the first embodiment, further since reinforcing tool 6 ₅ itself is also was created by cutting a prism A, considerably reinforce the printed circuit board 1 It is especially effective when the strength of is required.

[0037]

As described above, in the invention according to claim 1, when the reinforcing tool is fixed to the surface of the printed wiring board, only the fixing portion comes into contact with the surface of the printed wiring board. The reduction of the component mounting area on the surface of the printed wiring board can be suppressed to a minimum, and a space is formed between the reinforcing portion and the printed wiring board by the gap portion, and the printed wiring board below the gap portion can be formed. It is possible to wire a pattern on the surface of and to mount components.

In the invention according to claim 2, since the reinforcing portion is composed of the plate-like connecting portion and the reinforcing bending portion formed by bending the upper end of the connecting portion, the number of times of bending and the bending of the reinforcing bending portion are increased. Depending on the shape, the strength of the reinforcing portion can be increased. That is, when forming the wide width of the gap, it is possible to prevent the strength of the entire reinforcing portion from decreasing by increasing the number of times of bending of the reinforcing bending portion. The improvement and the reinforcement of the reinforcing tool can be achieved at the same time.

In the invention according to claim 3, a prism is used as the reinforcing portion, one side portion of the prism is partially cut off to form the gap portion, and the portion left on the one side portion is fixed to the fixing portion. Since it has been used as, the strength of the reinforcing tool can be further increased.

In the invention according to claim 4, the mounting mechanism is provided at three or more locations at substantially equal intervals with respect to the entire length of the reinforcing tool so that the mounting mechanism holds both end portions and the central portion of the printed wiring board. The reinforcement of the printed wiring board can be ensured.

Further, in the invention according to claim 5, since the reinforcing tool is fixed to the printed wiring board, a pattern is wired on the surface of the printed wiring board under the gap, and parts are mounted, the circuit diagram is followed. Arrangement of the components, wiring of the pattern is possible, the pattern length can be shortened, and the detouring process of the pattern can be reduced, and deterioration of the function of the printed wiring board can be prevented. Workability can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a reinforcing structure for a printed wiring board according to the present invention.

FIG. 2 is a perspective view of a first embodiment of a reinforcing tool for a printed wiring board according to the present invention.

FIG. 3 is an explanatory diagram of component arrangement in the reinforcing structure for a printed wiring board according to the present invention.

FIG. 4 is an explanatory diagram of pattern wiring in the reinforcing structure for a printed wiring board according to the present invention.

FIG. 5 is a perspective view of a second embodiment of a reinforcing tool for a printed wiring board according to the present invention.

FIG. 6 is a perspective view of a third embodiment of a printed wiring board reinforcing tool according to the present invention.

FIG. 7 is a perspective view of a fourth embodiment of a reinforcing tool for a printed wiring board according to the present invention.

FIG. 8 is a perspective view of a fifth embodiment of a reinforcing tool for a printed wiring board according to the present invention.

FIG. 9 is a perspective view of a conventional printed wiring board reinforcing structure.

[Explanation of reference numerals] 1 printed wiring board 3 pattern 5 parts 6 ₁ reinforcing tool 7 fixing part 8 reinforcing part 11 gap part 12 mounting mechanism

Claims (5)

[Claims] 1. A reinforcing tool which is fixed to the surface of a printed wiring board to supplement the strength of the printed wiring board, wherein a plurality of fixing portions having an attachment mechanism for attaching to the printed wiring board are connected by a reinforcing portion. A reinforcing tool for a printed wiring board, wherein the reinforcing portion between the fixing portions is partially cut off to form a gap. 2. The reinforcing portion is composed of a plate-shaped connecting portion and a reinforcing bending portion formed by bending one end of the connecting portion, and the connecting portion connects the fixing portion, The reinforcing tool for a printed wiring board according to claim 1, wherein a gap portion is formed in the connecting portion. 3. A prism is used as the reinforcing portion, one side of the prism is partially cut off to form the gap portion, and a portion left on the one side is used as the fixing portion. The reinforcing tool for a printed wiring board according to claim 1. 4. The reinforcing tool for a printed wiring board according to claim 1, wherein the attachment mechanism is provided at three or more locations at equal intervals with respect to the entire length of the reinforcing tool. 5. A plurality of fixing portions having an attachment mechanism for attaching to a printed wiring board, a reinforcing portion connecting the fixing portions, and the reinforcing portions between the fixing portions are partially cut off to be formed. A reinforcing structure for a printed wiring board, characterized in that a reinforcing tool composed of the above-mentioned gap is fixed to a printed wiring board on which pattern wiring and components are arranged, except for a range in contact with the fixing portion.