TWI695663B - Circuit board assembly - Google Patents

Abstract

A circuit board assembly includes a circuit board and a mechanical component. The circuit board includes a first positioning hole and a second positioning hole. The mechanical component includes a first positioning column and a second positioning column. The first positioning column and the second positioning column extend along a first direction and are arranged along a second direction. The first positioning column and the second positioning column pass through the first positioning hole and the second positioning hole respectively. The first positioning column has a cross section perpendicular to the first direction. The cross section has a first width in the second direction and a second width in a third direction perpendicular to the second direction. The second width is greater than the first width.

Description

Circuit board assembly

The present disclosure relates to a circuit board assembly.

When a circuit board is applied to an electronic device, its position is often fixed by screwing. The circuit board and the matching mechanical parts are usually provided with at least two locking holes for screws to fix the circuit board on the mechanical parts. However, the manufacturing tolerances of the positions of the locking holes often make it impossible to align the locking holes of the circuit board with the locking holes of the mechanism parts, which affects the assembly of the electronic device.

Therefore, how to propose a circuit board assembly that can solve the above-mentioned problems is one of the directions in which urgent efforts are currently needed.

In view of this, one objective of the present disclosure is to propose a circuit board assembly that can absorb manufacturing tolerances.

To achieve the above objective, according to some embodiments of the present disclosure, a circuit board assembly includes a circuit board and a mechanical component. The circuit board includes a first positioning hole and a second positioning hole. The mechanism component includes a first positioning post and a second positioning post. The first positioning post and the second positioning post extend along the first direction and are arranged along the second direction, and respectively pass through the first positioning hole and the second positioning hole. The first positioning post includes a cross section that is perpendicular to the first direction. The cross-section has a first width in the second direction, and the cross-section has a second width in a third direction perpendicular to the second direction, and the second width is greater than the first width.

In one or more embodiments of the present disclosure, the first positioning post and the inner wall of the first positioning hole have a first width difference in the second direction, and have a second width smaller than the first width difference in the third direction difference.

In one or more embodiments of the present disclosure, the first positioning column is an elliptical column, and the cross section is an elliptical cross section.

In one or more embodiments of the present disclosure, the first positioning hole is a round hole with a diameter greater than the second width.

In one or more embodiments of the present disclosure, the second positioning post is a cylinder.

In one or more embodiments of the present disclosure, the second positioning hole is a circular hole, and its diameter is equal to the diameter of the cylinder.

In one or more embodiments of the present disclosure, the mechanism component further includes a substrate. The first positioning post and the second positioning post are located on the substrate, and the second direction and the third direction are inclined with respect to the edge of the mechanism part.

In one or more embodiments of the present disclosure, the first positioning post includes a top wall and a side wall, and a lead angle is included between the top wall and the side wall.

In one or more embodiments of the present disclosure, the first positioning post includes a top wall, and a locking hole located on the top wall.

In one or more embodiments of the present disclosure, the height of the first positioning pillar in the first direction is less than the thickness of the circuit board.

In summary, the circuit board assembly of the present disclosure utilizes positioning holes and positioning posts respectively provided on the circuit board and the mechanical component to achieve the positioning of the circuit board, and the geometric design of the positioning holes and positioning posts makes it possible to absorb manufacturing tolerances Ability.

For a more detailed and complete description of the present disclosure, reference may be made to the accompanying drawings and various embodiments described below. The elements in the drawings are not drawn to scale and are provided only to illustrate the present disclosure. Many practical details are described below to provide a comprehensive understanding of this disclosure. However, those of ordinary skill in the relevant arts should understand that this disclosure can be implemented without one or more practical details. Therefore, these details are not Apply to limit this disclosure.

Please refer to Figure 1 and Figure 2. FIG. 1 is an exploded view of the circuit board assembly 100 according to an embodiment of the present disclosure, and FIG. 2 is an assembled view of the circuit board assembly 100 shown in FIG. 1. The circuit board assembly 100 includes a circuit board 110 and a mechanism 120. For example, the circuit board 110 and the mechanical component 120 may be part of an electronic device (not shown). The mechanical component 120 is used to fix the position of the circuit board 110. In some embodiments, the mechanism component 120 is a part of the housing of the electronic device, but the disclosure is not limited thereto.

As shown in FIGS. 1 and 2, the circuit board 110 includes a first positioning hole 111 and a second positioning hole 112. The mechanism 120 includes a base plate 123 and first and second positioning posts 121 and 122 disposed on the base plate 123. The first positioning post 121 and the second positioning post 122 are configured to pass through the first positioning hole 111 and the second positioning hole 112 respectively, so as to limit the position of the circuit board 110.

As shown in FIGS. 1 and 2, the first positioning posts 121 and the second positioning posts 122 extend along the first direction d1 perpendicular to the top surface of the substrate 123, and are arranged along the second direction d2, in other words, the second The direction d2 is the direction in which the line connecting the center of the first positioning post 121 and the center of the second positioning post 122 extends. In some embodiments, as shown in FIG. 1, the arrangement direction of the first positioning posts 121 and the second positioning posts 122 (that is, the second direction d2) is opposite to the third direction d3 perpendicular to the second direction d2 At least one edge of the substrate 123 is inclined, that is to say, in some embodiments, such as in a top view state (ie, the viewing direction is parallel to the first direction d1), the second direction d2 and the third direction d3 will not It overlaps with the extending direction of any edge of the substrate 123.

As shown in FIG. 2, in this embodiment, the second positioning post 122 is a cylinder. The second positioning hole 112 is a round hole, and its diameter is equal to or slightly larger than the diameter of the second positioning column 122, so that the second positioning hole 112 can be securely sleeved on the second positioning column 122. In order to meet the manufacturing tolerance of the distance between the first positioning hole 111 and the second positioning hole 112 (specifically, the positions of the first positioning hole 111 and the second positioning hole 112 may be slightly deviated from the designed position due to manufacturing tolerances, The distance between the two holes is slightly changed), the first positioning post 121 is an elliptical cylinder, and the first positioning hole 111 is a circular hole with a diameter larger than the long axis of the first positioning post 121.

The above configuration can absorb the manufacturing tolerance of the distance between the first positioning hole 111 and the second positioning hole 112. In other words, even if the first positioning hole 111 and the second positioning hole 112 deviate slightly from the designed position due to the manufacturing tolerance, the first positioning The post 121 and the second positioning post 122 can still pass through the first positioning hole 111 and the second positioning hole 112 respectively to fix the position of the circuit board 110. The geometric features of the first positioning column 121 will be described in detail below with reference to FIG. 3.

Please refer to FIG. 3, which is a partially enlarged cross-sectional view of the circuit board assembly 100 shown in FIG. 2 in a viewing direction that is perpendicular to the d2-d3 plane (that is, parallel to the first direction d1). The first positioning post 121 includes a cross-section 121e perpendicular to the first direction d1, which has a first width 121w1 in the second direction d2 and a second width 121w2 greater than the first width 121w1 in the third direction d3. In this embodiment, the cross-section 121e of the first positioning post 121 has an elliptical shape, the first width 121w1 is the length of the short axis of the ellipse, and the second width 121w2 is the length of the long axis of the ellipse.

As shown in FIG. 3, in the second direction d2, the inner walls of the first positioning post 121 and the first positioning hole 111 have a first width difference, and in the third direction d3, the first positioning post 121 and the first positioning hole The inner wall of 111 has a second width difference smaller than the first width difference. Specifically, the first width difference is the difference between the diameter of the first positioning hole 111 and the first width 121w1 (that is, the length of the short axis of the ellipse), which is twice the distance m1 marked in the figure, and the second width difference is The difference between the diameter of the first positioning hole 111 and the second width 121w2 (that is, the length of the major axis of the ellipse) is twice the distance m2 indicated in the figure.

The larger first width difference allows the circuit board assembly 100 to absorb larger tolerances in the second direction d2. The cylindrical design of the second positioning post 122 allows the circuit board 110 to rotate around the second positioning post 122 to adjust the position to accommodate the tolerance in the third direction d3. Therefore, the second width difference can be designed to be smaller.

Please refer to FIG. 4, which is a partially enlarged cross-sectional view of the circuit board assembly 100 shown in FIG. 2 in another viewing direction, which is perpendicular to the d1-d3 plane (that is, parallel to the second direction d2). In some embodiments, the first positioning post 121 includes a top wall 121a and a side wall 121b, and a lead angle 121c is included between the top wall 121a and the side wall 121b. In some embodiments, the second positioning post 122 also includes a guide angle 122c (see FIG. 1). The setting of the guide angles 121c and 122c is convenient for the assembler to match the circuit board 110 and the mechanism 120 together, and it is not necessary to align the first positioning hole 111 and the second positioning hole 112 precisely with the first positioning column 121 and the second positioning The column 122 can be nested. In some embodiments, the side of the first positioning hole 111 facing the mechanism member 120 includes a guide angle 111 a configured to assist in guiding the first positioning post 121 to be inserted into the first positioning hole 111 so that the first positioning post 121 is inserted The resistance to the first positioning hole 111 decreases. The arrangement of the lead angle 111a can further improve the assembly convenience of the circuit board assembly 100.

In some embodiments, as shown in FIG. 4, the height of the first positioning post 121 in the first direction d1 is less than the thickness of the circuit board 110, and the top wall 121 a of the first positioning post 121 includes a locking hole 121 d. By locking the fixing member 999 (for example, a screw) into the locking hole 121d, the circuit board 110 can be firmly fixed to prevent the circuit board 110 from shaking because the first positioning hole 111 is larger than the size of the first positioning column 121. Specifically, after the operator aligns the first positioning hole 111 and the second positioning hole 112 with the first positioning column 121 and the second positioning column 122 respectively, and locks the fixing member 999 into the locking hole 121d, the circuit board 110 It will be clamped between the fixing member 999 and the substrate 123 of the mechanism member 120 to be fixed. In some embodiments, the height of the second positioning post 122 in the first direction d1 is also less than the thickness of the circuit board 110, and the second positioning post 122 also includes a locking hole (not shown) for another fixing member (figure (Not shown) lock in to prevent the second positioning post 122 from being disengaged by the second positioning hole 112.

Please refer to FIG. 5, which is a partially enlarged cross-sectional view of the circuit board assembly 200 according to another embodiment of the present disclosure in a viewing direction that is perpendicular to the d2-d3 plane (that is, parallel to the first direction d1). The circuit board assembly 200 includes a circuit board 110 and a mechanism component 220, wherein the circuit board 110 is the same as the embodiment shown in FIG. 3, and reference may be made to the related description above, which is not repeated here. One difference between this embodiment and the embodiment shown in FIG. 3 is that the first positioning post 221 of the mechanism 220 of this embodiment has a different shape from the first positioning post 121 shown in FIG. 3. Specifically, the cross section 221e of the first positioning column 221 perpendicular to the first direction d1 is formed by two arcs and two straight lines connected between the two arcs, wherein the two arcs are arranged in the third direction d3, and the two straight lines are in the second Arranged in the direction d2.

Although the cross-sectional shape is different from the first positioning post 121, the first positioning post 221 retains part of the geometric features of the first positioning post 121. Specifically, the cross section 221e of the first positioning post 221 has a first width 221w1 in the second direction d2, and a second width 221w2 greater than the first width 221w1 in the third direction d3. In the second direction d2, the first positioning post 221 and the inner wall of the first positioning hole 111 have a first width difference (ie, twice the distance n1), and in the third direction d3, the first positioning post 221 and the first The inner wall of a positioning hole 111 has a second width difference smaller than the first width difference (ie, twice the distance n2). With the above geometric features, the circuit board assembly 200 has the ability to absorb manufacturing tolerances.

It should be understood that the circuit board assemblies 100 and 200 shown in FIGS. 3 and 5 are only two of the embodiments of the present disclosure, and the present disclosure is not limited thereto. The present disclosure assumes that the first positioning post and the first positioning hole can have any shape without affecting their ability to absorb tolerances, in other words, as long as the cross section of the first positioning post perpendicular to the first direction d1 is in the second direction d2 Is smaller than the width in the third direction d3, and the width difference between the first positioning post and the inner wall of the first positioning hole in the second direction d2 is greater than the width difference between the two in the third direction d3. For example, the first positioning column may also be a column having an oval, semi-elliptical, or other suitable cross-section.

In summary, the circuit board assembly of the present disclosure utilizes positioning holes and positioning posts respectively provided on the circuit board and the mechanical component to achieve the positioning of the circuit board, and the geometric design of the positioning holes and positioning posts makes it possible to absorb manufacturing tolerances Ability.

Although this disclosure has been disclosed as above by way of implementation, it is not intended to limit this disclosure. Anyone who is familiar with this skill can make various changes and modifications within the spirit and scope of this disclosure, so the protection of this disclosure is protected The scope shall be as defined in the appended patent application scope.

100, 200: circuit board assembly

110: circuit board

111: first positioning hole

111a: lead angle

112: Second positioning hole

120, 220: mechanical parts

121, 221: The first positioning column

121a: top wall

121b: Side wall

121c, 122c: lead angle

121d: locking hole

121e, 221e: cross section

121w1, 221w1: first width

121w2, 221w2: second width

122: second positioning post

123: substrate

999: Fixture

d1: first direction

d2: second direction

d3: third direction

m1, n1, m2, n2: distance

In order to make the above and other objects, features, advantages and embodiments of the present disclosure more obvious and understandable, the drawings are described as follows: FIG. 1 is an exploded view showing a circuit board assembly according to an embodiment of the present disclosure. Figure 2 is a combination diagram of the circuit board assembly shown in Figure 1. FIG. 3 is a partially enlarged cross-sectional view of the circuit board assembly shown in FIG. 2 in a viewing direction. FIG. 4 is a partially enlarged cross-sectional view of the circuit board assembly shown in FIG. 2 in another viewing direction. FIG. 5 is a partially enlarged cross-sectional view of a circuit board assembly according to another embodiment of the present disclosure.

100: circuit board assembly

110: circuit board

111: first positioning hole

112: Second positioning hole

120: institutional parts

121: The first positioning column

122: second positioning post

122c: lead angle

123: substrate

d1: first direction

d2: second direction

d3: third direction

Claims (9)

A circuit board assembly includes: a circuit board including a first positioning hole and a second positioning hole; and a mechanical component including a first positioning column and a second positioning column, the first positioning column and the first positioning column The two positioning posts extend along a first direction and are arranged along a second direction, and respectively pass through the first positioning hole and the second positioning hole, wherein the first positioning post includes a cross section, the cross section is perpendicular to the In the first direction, the cross-section has a first width in the second direction, the cross-section has a second width in a third direction perpendicular to the second direction, the second width is greater than the first width; wherein the The first positioning post and the inner wall of the first positioning hole have a first width difference in the second direction, and the first positioning post and the inner wall of the first positioning hole have a second width in the third direction Difference, the second width difference is smaller than the first width difference. The circuit board assembly of claim 1, wherein the first positioning post is an elliptical post, and the cross section is an elliptical cross section. The circuit board assembly according to claim 2, wherein the first positioning hole is a round hole, and the diameter of the round hole is greater than the second width. The circuit board assembly according to claim 1, wherein the second positioning post is a cylinder. The circuit board assembly according to claim 4, wherein the second positioning hole is a round hole, and the diameter of the round hole is equal to the diameter of the cylinder. The circuit board assembly of claim 1, wherein the mechanism further includes a substrate, the first positioning post and the second positioning post are located on the substrate, and the second direction and the third direction are relative to the mechanism One of the pieces has an inclined edge. The circuit board assembly according to claim 1, wherein the first positioning post includes a top wall and a side wall, and a lead angle is included between the top wall and the side wall. The circuit board assembly according to claim 1, wherein the first positioning post includes a top wall, and a locking hole located on the top wall. The circuit board assembly of claim 1, wherein a height of the first positioning post in the first direction is less than a thickness of the circuit board.

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