JP2710435B2 - Printed circuit board positioning structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a positioning structure for connecting printed circuit boards.

[Prior Art] FIGS. 10 and 11 show a conventional structure for positioning when connecting printed circuit boards. First flexible printed circuit board
In order to electrically connect the first flexible printed board 51 to the second flexible printed board 52, the connection formed on the second flexible printed board 52 is connected to the exposed copper foil 53 for connection on the first flexible printed board 51. Lay the claws 54
A method of obtaining electrical connection between the two substrates by adding 55 is generally performed. At this time, since it is necessary to position the exposed copper foil 53 for connection and the claw-shaped projection 54 for connection accurately, the first flexible printed circuit board is required.
While two positioning dowels 57 are erected on the support plate 56 of 51,
Positioning holes 58, 59 in both flexible printed circuit boards 51, 52
When the flexible printed boards 51 and 52 are overlapped, the positioning dowel 57 is used to accurately align the positional relationship between each of the connecting copper foil exposed portions 53 and each of the connecting claw-shaped protrusions 54. Have been.

[Problems to be Solved by the Invention] In the above conventional example, in addition to the two flexible printed boards to be connected, a support plate member for providing a dowel for positioning is required.
Since it is necessary to provide two positioning holes, there are the following problems.

(1) If the supporting plate member for setting the positioning dowel is not at an appropriate position, a member for setting the positioning dowel must be prepared separately, which leads to an increase in the number of parts.

(2) Since two positioning holes must be provided in both flexible printed boards to be connected, the terminal portions of both boards are complicated, the size of the flexible printed board is increased, and the cost is increased.

(3) The mounting density is reduced by the provision of the positioning holes.

(4) The positional relationship between the two positioning holes provided on each printed circuit board, the exposed copper foil for connection of the first flexible printed circuit board, and the claw-shaped projections for connection of the second flexible printed circuit board is enhanced. Is required, which increases the cost of the flexible printed circuit board.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and has been made in consideration of such a problem that a print that can accurately position two printed circuit boards without inviting an increase in the number of parts, an increase in the size of the board, and an increase in cost. An object of the present invention is to provide a substrate positioning structure.

Means for Solving the Problems In order to achieve the above object, a first invention of the present application provides a printed circuit board positioning structure for positioning a first and a second printed circuit board in a predetermined positional relationship with each other. , A first positioning mark formed of a pattern formed on a surface of a first printed circuit board by a printing process, and a first positioning mark formed on a surface of a second printed circuit board along an outer edge of the substrate by a printing process It has a pattern, and has a second positioning mark paired with the first positioning mark when both printed circuit boards are positioned so as to have the predetermined positional relationship. Then, when the first and second printed circuit boards have a predetermined positional relationship with each other, the outer edge of the portion of the second printed board where the edge of the first positioning mark is formed and the second positioning mark are formed. A gap extending at an equal interval is formed between the edge and the edge so that the positioning marks are combined.

According to the present invention, when both positioning marks are combined, the combined edges of both marks do not overlap, and a gap is formed between these edges. For this reason, the presence of this gap makes it possible to visually confirm that the positional relationship between the two substrates in the width direction or the longitudinal direction is appropriate, and furthermore, the fact that the gap extends at an equal interval reduces the overlapping angle of the two substrates. It can be visually confirmed that there is no shift.

It is desirable that at least a part of the gap is formed in a straight line so that it is easy to see whether the gap is equidistant. In addition, at least a part of the edge used for positioning the two positioning marks is formed with a concave portion and a convex portion which are combined with each other with a gap therebetween, so that the displacement of both substrates with respect to the longitudinal direction of the linear gap can be confirmed. It is desirable to do so.

An arc-shaped portion having substantially the same diameter is provided in a portion of the first and second positioning marks where the gap is not formed,
For example, when both printed circuit boards have a predetermined positional relationship,
A mark having a substantially circular outer shape may be formed by the two positioning patterns so that it can be confirmed that there is no displacement between the two substrates.

According to a second aspect of the present invention, in a printed circuit board positioning structure for positioning the first and second printed boards in a predetermined positional relationship, a positioning hole provided in the first printed board is provided. A first positioning mark formed of a pattern formed on the surface of one printed circuit board by a printing process; and a pattern formed on the surface of a second printed circuit board along the outer edge of the substrate by a printing process. When the two printed circuit boards are positioned to have the predetermined positional relationship, the first
And a claw-shaped protrusion having a width substantially equal to the diameter of a positioning hole provided in the second printed circuit board. Then, when the first and second printed circuit boards have the above-mentioned predetermined positional relationship, the edge of the first positioning mark and the second positioning mark are inserted with the claw-shaped protrusions inserted into the positioning holes. The portion where the mark is formed and the outer edge of the second printed circuit board have a predetermined relationship.

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to implement | achieve the positioning structure for connecting both printed circuit boards firmly easily and inexpensively.

In the present invention, when the first and second printed boards have a predetermined positional relationship with each other, the edge line of the first positioning mark provided on the first printed board is
It is desirable to form a gap extending at equal intervals between the portion where the second positioning mark is formed and the outline of the edge of the second printed circuit board.

In the present invention, it is preferable that the first positioning mark is provided near the positioning hole and the second positioning mark is provided near the claw-shaped protrusion.

Embodiment (First Embodiment) FIG. 1 is a plan view showing a first embodiment of the present invention. 1
Denotes a first flexible printed circuit board, and 6 denotes a second flexible printed circuit board. This figure shows a state before positioning and overlapping the substrates 1 and 6 and before connecting the wiring patterns by soldering. 2 is the first
The positioning holes provided in the flexible printed circuit board 1 are reinforced with copper foil for positioning. 4 is the first
The exposed portion of the connecting copper foil disposed on the flexible printed circuit board 1 is a wiring pattern 5. L is an edge of the cover lay film, a region 1 'is covered with the cover lay film, and an arranged copper foil pattern is exposed in a region 1 ". Reference numeral 7 is a second flexible printed circuit board. The positioning copper foil 8 is formed near the base of the projection by the positioning claw-shaped projection provided on the projection 6, and this portion is reinforced.

Reference numeral 9 denotes a connecting claw-shaped protrusion, and the protrusion 9 is not covered with the coverlay film, and the copper foil is exposed. Reference numeral 10 denotes a wiring pattern of the protrusion 9 provided on the second flexible printed circuit board 6.

FIG. 2 (a) is a partially enlarged view of the vicinity of the positioning hole 2, and FIG. 2 (b) shows a bb cross section thereof.

The shape of the positioning copper foil 3 formed around the positioning hole 2 is half-moon-shaped and has a linear edge 3a.
The linear edge 3a is formed by inserting the positioning claw-shaped protrusion 7 of the second flexible printed circuit board 6 into the positioning hole 2 and rotating the positioning claw-shaped center 7 around the positioning hole 2, thereby forming each of the exposed portions 4 and the protrusion. 9 are aligned for connection, that is, when the two substrates are at predetermined positions, a linear edge 6a near the base of the positioning claw-shaped protrusion 7 on the second flexible printed circuit board 6 (that is, It is configured so as to be parallel to the linear edge 8a) of the copper foil 8. In addition, the positioning claw-shaped protrusion 7 and the positioning copper foil 8 formed in a half-moon shape near the root thereof are connected to the second flexible printed circuit board 6.
Is in the aligned position for connection, the positioning holes 2
When combined with the positioning copper foil 3 formed on a half circumference of the above, it has a shape which is apparently circular in plan view. This serves as a reference for confirming that the two printed boards 1 and 6 have a predetermined positional relationship.

Further, when the two printed boards 1 and 6 have a predetermined positional relationship, a slight gap is formed between the linear edge portions 3a and 8a of the copper foils 3 and 8, and the gap is formed between them. If the second printed circuit board 6 is rotated with respect to the first printed circuit board 1 until the gap to be made has the same width in the longitudinal direction, the predetermined positional relationship between the two printed boards 1 and 6 can be achieved very easily.

(Modification of First Embodiment) FIGS. 3 and 4 show a modification of the first embodiment.
In the first embodiment shown in FIG. 1, the projecting direction of the positioning claw-shaped protrusion 7 provided on the second flexible printed circuit board 6 is substantially orthogonal to the protrusion direction 1 of the connection claw-shaped protrusion 9. As shown in FIG. 3, the terminal of the second flexible printed circuit board 6 'was extended to the side of the arrangement portion of the connecting claw-shaped protrusions 9 as shown in FIG. The protrusion 7 may be made to protrude in the same direction as the connection claw-shaped protrusion 9. In this case, since it is natural to advance the second flexible printed circuit board 6 in the direction of arrow A in the figure and to superimpose the two boards 1, 6 ', it is possible to improve the assembly.

In addition, as shown in Fig. 4, the positioning claw-shaped protrusion 7 "may be protruded in the direction opposite to the connection claw-shaped protrusion 9. In this case, the connection direction of the two substrates 1, 6" is opposite to the connection direction. When the pulling force is acting in the direction, the effect of temporarily holding the second flexible printed circuit board 6 ″ at a predetermined position can be aimed at.

Second Embodiment As a second embodiment, as shown in FIGS. 5 and 6,
The shape of the combined edge of the positioning copper foil provided on the first printed board and the edge of the second printed board (ie,
The shape of the combination edge of the copper foil for positioning provided on this substrate has a semicircular unevenness relationship in addition to the straight-line parallel line relationship, so that both printed boards can be accurately positioned, and A positioning hole is not provided in the substrate, so that the substrate surface is not weakened and the mounting density is increased.

In FIG. 5, reference numeral 21 denotes a first flexible printed board, and reference numeral 26 denotes a second flexible printed board, which shows a state in which both boards 21 and 26 are positioned and overlapped. Reference numeral 23 denotes a positioning copper foil provided on the first flexible printed board 21, and reference numeral 23b denotes an arc-shaped convex portion of the positioning copper foil 23.

Reference numeral 24 denotes an exposed portion of the copper foil for connection arranged in plural on the first flexible printed circuit board 21, and reference numeral 25 denotes a wiring pattern. L is the edge of the cover lay film, the area 21 'is covered with the cover lay film, and the arranged copper foil pattern is exposed in the area 21 ". 26b is the second flexible printed circuit board. 26 is an arc-shaped concave portion formed at the side edge portion, and a positioning copper foil 28 is formed around the concave portion to reinforce this portion.

Reference numeral 29 denotes a connecting claw-shaped protrusion, and the protrusion 29 is not covered with the coverlay film and the copper foil is exposed. Reference numeral 30 denotes a wiring pattern provided on the second flexible printed board 26. FIG. 6 is an enlarged view of the vicinity of the positioning copper foil 23. The shape of the positioning copper foil 23 includes an arc-shaped convex portion 23b having a small radius r and a semi-circular end portion 23c having a large radius R.
And a straight edge 23a.

The arc-shaped concave portion 26b (that is, the arc-shaped concave portion 28b of the positioning copper foil 28) formed on the side edge portion of the second flexible printed board 26 is concentric with the arc-shaped convex portion 23b, and the radius thereof is smaller than r. It is set slightly larger. Therefore, when the two flexible printed boards 21 and 26 are overlapped in a predetermined positional relationship, the arc-shaped convex portions 23b are adjacent to each other at a small interval without overlapping the arc-shaped concave portions 26b. That is, the linear edge 23a of the positioning copper foil 23 is parallel to the linear edge 26a of the second flexible printed board 26 (that is, the linear edge 28a of the positioning copper foil 28). The semi-circular portions 28c of the positioning copper foil 28 are adjacent to each other so as to form a gap, and the radius R of the semi-circular portions 23c of the positioning copper foil 23
To form a circle. This serves as a guide for positioning the printed circuit boards 21 and 26.

(Modification of Second Embodiment) FIG. 7 shows a modification of the second embodiment, and FIG. 8 shows a partially enlarged view thereof. 33 is the first flexible printed circuit board 31
The reference numeral 34 denotes an arc-shaped concave portion of the positioning copper foil 33. 35 is an arc-shaped convex portion formed on the side edge of the second flexible printed board 36,
A copper foil 38 for positioning is formed around the periphery, and this portion is reinforced. The shape of the positioning copper foil 33 is formed by an arc-shaped concave portion 33b having a small radius r ', an arc-shaped portion 33c having a large radius R', and a straight edge portion 33a.

The arc-shaped protrusion 36b (that is, the arc-shaped protrusion 38b of the positioning copper foil 38) formed on the side edge of the second flexible printed board 36 is concentric with the arc-shaped recess 33b and has a radius r '. It is set slightly smaller. For this reason, when the two flexible printed boards 31 and 32 are in a predetermined positional relationship, the arc-shaped convex portions 3 are adjacent to each other at a small interval without overlapping the arc-shaped concave portions 14. That is, the linear edge 33a of the positioning copper foil 33 is parallel to the linear edge 36a of the second flexible printed circuit board 12 (that is, the linear edge 38a of the positioning copper foil 38) and has a gap. And the semi-circular portion 38c of the positioning copper foil 38 together with the semi-circular portion 33c of the positioning copper foil 33 has a radius R '.
To form a circle. This serves as a guide for positioning the printed circuit boards 31 and 36.

As another modified example, as shown in FIG. 9, the main positioning structures 43 and 48 may be formed on the front edge of the first printed circuit board 41 having the connection claw-shaped protrusion arrangement.

The positioning structure of the present invention is composed of two pieces of copper foil, and when the flexible printed circuit board is in a predetermined positional relationship, these copper foils are adjacent to each other. It is also possible to make the fixing state stronger and to use the positioning part itself as an electrical connection part.

In particular, when the second printed circuit board is folded back after the second printed circuit board is electrically connected to the first printed circuit board, the positioning structure according to the present invention is provided at two or more locations between the two printed circuit boards, and one of the positioning structures is described above. It is also possible to use as a fixing means by soldering.

(Relationship Between Embodiments and Claims) The first and second flexible printed circuit boards 1, 21, 31, 41, 6, 26, 36, and 46 in the above embodiment correspond to the first and second embodiments described in the claims. In the printed circuit board, the positioning holes 2 are in the positioning holes described in the claims, the positioning claw-shaped protrusions 7 are in the claw-shaped protrusions in the claim, and the positioning copper foil 3 and
23,33,43,8,28,38,48 are attached to the first and second positioning marks as claimed in the claims, and the linear edge portions 3a, 23a, 33a, 8a,
The portions 28a and 38a correspond to the portions "forming a straight line" in the gaps described in the claims, and the arc-shaped concave portions 26b and 33b and the convex portions 23b and 36b correspond to the concave portions and the convex portions in the claims.

[Effects of the Invention] As described above, according to the present invention, a positioning structure capable of positioning a printed board with high accuracy can be realized at low cost without increasing the number of manufacturing steps of the printed board.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention, showing a state in which first and second flexible printed boards are overlapped with each other, and FIG. 2 (a) is a view showing both boards in FIG. 2 (b) is a cross-sectional view taken along the line bb in FIG. 2 (a), FIG. 3 is a plan view showing a modification of the first embodiment of the present invention, FIG. 4 is a similar view showing another modification of the first embodiment, FIG. 5 is a plan view showing the second embodiment, FIG. 6 is a partially enlarged view of FIG. 5, and FIG. FIG. 8 is a partial enlarged view of FIG. 7, FIG. 9 is a plan view showing another modification of the second embodiment, and FIGS. It is a plane view and a cross-sectional view shown. 1,21,31,41… First flexible printed circuit board 2… Positioning holes 3,23,33,34… Positioning copper foil 3a, 23a, 33a… Positioning copper foil 3 , 23,33 linear end portions 23b ... arc-shaped convex portions 33b of positioning copper foil 23 ... arc-shaped concave portions 23c, 33c, 28c, 38c ... positioning copper foil 23, 33, 28, 38 semi-circular portions 5 ... wiring patterns 6, 26, 36, 46 ... second flexible printed circuit board 7 ... positioning claw-shaped projections 26a, 36a ... second flexible printed circuit board 26, 36 linear edge portion 26b ... arcuate concave portion of second flexible printed board 26 36b arcuate convex portion of second flexible printed board 36 8, 28, 38, 48 ... positioning of second flexible printed board Copper foil 8a, 28a, 38a …… Linear edge of positioning copper foil 8,28,38 10,30 …… Wiring pattern

Claims (8)

(57) [Claims] 1. A printed circuit board positioning structure for positioning a first printed circuit board and a second printed circuit board in a predetermined positional relationship, comprising a pattern formed on a surface of the first printed circuit board by a printing process. A first positioning mark, and a pattern formed on a surface of the second printed board along a peripheral edge of the printed board by a printing process, and the two printed boards are positioned so as to have the predetermined positional relationship. A second positioning mark that is paired with the first positioning mark when the first and second printed circuit boards have the predetermined positional relationship with each other. An edge of the first positioning mark and a portion of the second printed board on which the second positioning mark is formed. Positioning structure of a printed circuit board, which comprises forming a gap extending at regular intervals between the form edges. 2. The printed circuit board positioning structure according to claim 1, wherein at least a part of said gap is formed in a straight line. 3. The method according to claim 1, wherein at least a part of an edge used for positioning the positioning marks is provided with a concave portion and a convex portion which are combined with each other via a gap. Printed circuit board positioning structure. 4. The positioning of a printed circuit board according to claim 1, wherein the portion of the first and second positioning marks where the gap is not formed includes an arc-shaped portion having substantially the same diameter. Construction. 5. The printed circuit board according to claim 4, wherein when the two printed boards are in the predetermined positional relationship, a mark having a substantially circular outer shape is formed by the two positioning marks. Positioning structure. 6. A printed circuit board positioning structure for positioning a first printed circuit board and a second printed circuit board in a predetermined positional relationship with each other, wherein: a positioning hole provided in the first printed circuit board; A first positioning mark formed of a pattern formed on a surface of a printed circuit board by a printing process; and a pattern formed on the surface of the second printed circuit board along the outer edge of the substrate by a printing process; A second positioning mark that is paired with the first positioning mark when the two printed boards are positioned to have the predetermined positional relationship; and a positioning hole provided in the second printed board. And a claw-shaped protrusion having a width substantially the same as the diameter of the first printed circuit board. When the claw-shaped protrusion is inserted into the positioning hole, the edge of the first positioning mark and the second position of the second positioning mark are formed. A printed circuit board positioning structure, wherein a predetermined relationship is established between the printed board and an outer edge. 7. When the first and second printed circuit boards have the predetermined positional relationship with each other, an edge line of the first positioning mark provided on the first printed circuit board is aligned with the second positioning mark. 7. The printed circuit board positioning structure according to claim 6, wherein a gap is formed at regular intervals between a portion where the positioning mark is formed and an outline of an edge of the second printed circuit board. 8. The apparatus according to claim 6, wherein said first positioning mark is provided near said positioning hole, and said second positioning mark is provided near said claw-shaped protrusion. Or the printed circuit board positioning structure according to 7.