JP2007299996A - Circuit board mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit board mounting structure that minimizes a displacement of a circuit board. <P>SOLUTION: Each mounting tongue 1d provided onto a support plate 1b of a mounting member 1 is respectively inserted into each mounting hole 2c as it remains inclined to each of first/second sides 2a, 2b of the circuit board 2 in the circuit board mounting structure. Therefore, it is possible to reduce a gap between each mounting hole 2c and the end part of each mounting tongue 1d so as to minimize the movement of the circuit board 2 in the first side 2a direction (an X-direction) and in the second side 2b direction (a Y-direction). Consequently, it is possible to minimize the displacement of the circuit board 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a circuit board mounting structure suitable for use in electronic devices, electronic circuit units, and the like.

  FIG. 7 is a cross-sectional view of a main part of a conventional circuit board mounting structure, and FIG. 8 is a relationship between the circuit board and the frame body of the conventional circuit board mounting structure. FIG. 9 is a main part enlarged plan view showing the state of the mounting hole and the mounting tongue piece in connection with the conventional circuit board mounting structure.

  Next, a configuration related to a conventional circuit board mounting structure will be described with reference to FIGS. 7 to 9. A box-shaped frame 51 made of a metal plate is bent from the bottom wall 51a and the bottom wall 51a. There are four side walls 51b extending upward, a support plate 51c cut and raised upward from the bottom wall 51a, and a mounting tongue piece 51d provided at an end of the support plate 51c. A plurality of support plates 51c are arranged along the opposite side wall 51b.

  The circuit board 52 has a square shape having a pair of first sides 52a parallel to each other and a pair of second sides 52b perpendicular to the first sides 52a and parallel to each other. 52 has a plurality of circular mounting holes 52c provided in the vicinity of the first side 52a corresponding to the mounting tongue 51d.

  As shown in FIGS. 8 and 9, the mounting tongue piece 51d is inserted into the mounting hole 52c of the circuit board 52, and when the mounting tongue piece 51d is inserted, the mounting tongue piece 51d is The state is arranged in parallel to the side 52a and at a right angle to the second side 52b.

  As a result, as shown in FIG. 9, between the attachment tongue piece 51d and the attachment hole 52c in the direction of the first side 52a (X direction), two two side end portions in the width direction of the attachment tongue piece 51d are formed. The gap S3 is larger than the gap S3 between the attachment tongue piece 51d and the attachment hole 52c in the second side 52b direction (Y direction), and is formed on both side surfaces in the width direction of the attachment tongue piece 51d. There are two gaps S4, and the circuit board 52 can move in the range of the two gaps S3 and S4 in the X and Y directions. However, since the gaps S3 and S4 are large, the circuit board 52 has the X and Y directions. The positional deviation is large in any of the directions, and the positional deviation of the circuit board 52 is further increased with respect to the Y direction.

Then, the circuit board 52 is pressed by a pressing portion 53a of a cover 53 disposed so as to close the open portion of the frame 51, and a conventional circuit board mounting structure is formed (see, for example, Patent Document 1). ).
Japanese Patent Laid-Open No. 10-303590

  In the conventional circuit board mounting structure, the mounting tongue 51d provided on the support plate 51c is parallel to the first side 52a of the circuit board 52 and perpendicular to the second side 52b. Therefore, the gap S2 in the direction of the first side 52a and the gap S4 in the direction of the second side 52b are increased, and the circuit board 52 has a large positional deviation in both the X and Y directions, and There is a problem that the circuit board 52 is further misaligned with respect to the Y direction.

  The present invention has been made in view of the actual situation of the prior art, and an object of the present invention is to provide a circuit board mounting structure with a small positional deviation of the circuit board.

  In order to achieve the above object, the present invention includes a circuit board having a plurality of circular mounting holes and a mounting member for mounting the circuit board, and the circuit boards are a pair of first parallel circuits. And a mounting hole provided in the circuit board is formed by the first and second sides, and has a rectangular shape having a pair of second sides perpendicular to the first side and parallel to each other. The mounting member is disposed in the vicinity of one of the opposing sides, and a mounting plate is formed on the support plate and inserted into the mounting hole. The circuit board is attached to the attachment member by being inserted into the attachment hole in a state where the attachment tongue piece is inclined with respect to each of the first and second sides.

  In the present invention configured as described above, since the mounting tongue is inserted into the mounting hole in an inclined state with respect to each of the first and second sides of the circuit board, the mounting hole and the end of the mounting tongue The circuit board is less moved in the first side direction (X direction) and the second side direction (Y direction), and the positional deviation of the circuit board can be reduced.

  Further, the present invention is characterized in that, in the above invention, a plurality of attachment holes are provided in the vicinity of opposing sides.

  The present invention configured as described above can reliably attach the circuit board to the attachment member.

  Further, the present invention is characterized in that, in the above-mentioned invention, the attachment tongue piece is disposed at an inclination of 45 degrees with respect to each of the first and second sides.

  According to the present invention configured as described above, the gap between the mounting hole and the end of the mounting tongue can be further reduced, and the circuit board has a first side direction (X direction) and a second side direction ( The movement in the (Y direction) is further reduced, the positional deviation of the circuit board can be reduced, and the gaps in the X and Y directions can be made equal.

  Further, the present invention is characterized in that, in the above invention, a land portion for soldering the mounting tongue piece is provided around the mounting hole of the circuit board.

  In the present invention configured as described above, the circuit board can be easily attached due to the presence of the land portion.

  Further, in the present invention according to the above invention, the attachment member is formed of a frame body or a cover for attaching the circuit board, and the frame body or the cover has a side wall arranged in a square shape and is supported. The board is characterized in that it is formed of side walls arranged along the first and second sides of the circuit board.

  The present invention configured as described above is suitable for use in attaching a circuit board to a frame or cover having a rectangular side wall.

  In the present invention, the attachment member is formed of a cover for attaching the circuit board, the cover has side walls arranged in an octagonal shape, and the support plate is the first and second support plates. It is characterized by being formed of side walls that are inclined with respect to each of the sides.

  The present invention configured as described above is suitable for use in attaching a circuit board to a cover having an octagonal side wall.

  In the present invention, since the mounting tongue is inserted into the mounting hole in an inclined state with respect to each of the first and second sides of the circuit board, the gap between the mounting hole and the end of the mounting tongue is The movement of the circuit board in the first side direction (X direction) and the second side direction (Y direction) is reduced, and the positional deviation of the circuit board can be reduced.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described. FIG. 1 relates to a first embodiment of the circuit board mounting structure of the present invention. 3 is a bottom view according to the first embodiment of the mounting structure, FIG. 3 is an exploded perspective view of the circuit board mounting structure according to the first embodiment of the present invention, and FIG. 4 is an exploded perspective view of the circuit board according to the present invention. FIG. 5 is a plan view of a circuit board mounting structure according to a second embodiment of the present invention, and FIG. 6 is a plan view of the circuit board mounting structure according to the present invention. It is a bottom view which concerns on 2nd Example of the attachment structure of a circuit board.

  Next, the structure according to the first embodiment of the circuit board mounting structure of the present invention will be described with reference to FIGS. 1 to 4. The mounting member 1 formed of a metal plate box-shaped cover includes an upper wall 1a, From a support plate 1b formed of four side walls bent downward from the upper wall 1a and extending downward, a plurality of arms 1c extending inward (opening side) from the support plate 1b, and an end of the arm 1c It has a plurality of mounting tongues 1d protruding upward.

  And the side wall which is the support plate 1b is formed by two pairs of side walls arranged in parallel and at right angles to form a square shape, and the mounting tongue 11d is a pair of opposing support plates (side walls) 1b. A plurality of mounting tongues 1d are arranged opposite to each other, and the mounting tongues 1d are inclined at 45 degrees with respect to all the support plates (side walls) 1b, and are opposed to each other. 1d is arranged in a letter C shape.

  The circuit board 2 made of an insulating material has a quadrangular shape having a pair of first sides 2a parallel to each other and a pair of second sides 2b perpendicular to the first sides 2a and parallel to each other. At the same time, the circuit board 2 has a plurality of circular mounting holes 2c provided in the vicinity of the first side 2a corresponding to the mounting tongue 1d.

  In addition, a land portion 3 is provided around the through hole 2c of the circuit board 2, and a wiring pattern 4 and various electronic components 5 are provided on the circuit board 2 as shown in FIG. A desired electric circuit is formed.

  The circuit board 2 is disposed so as to cover the open portion of the mounting member (cover) 1, and the mounting tongue 1 d is inserted into the mounting hole 2 c of the circuit board 2, and the mounting tongue 1 d and the land The part 3 is soldered, and the circuit board 2 is attached to the attachment member (cover) 1 to form the circuit board attachment structure of the present invention.

  In the circuit board mounting structure of the present invention having such a configuration, when the mounting tongue 1d is inserted into the through hole 2c, as shown in FIGS. It arrange | positions in the state inclined at 45 degree | times with respect to 2 sides 2a and 2b.

  As a result, as shown in FIG. 4, between the front end portion of the mounting tongue 1d in the width direction of the first side 2a (X direction) and the mounting hole 2c, the both ends of the mounting tongue 1d are located. Two gaps S1 are generated between both ends of the mounting tongue 1c between the front end in the width direction of the mounting tongue 1d in the second side 2b direction (Y direction) and the mounting hole 2c. There are two gaps S2, and the circuit board 2 can move in the range of the two gaps S1 and S2 in the X and Y directions.

  And if the attachment tongue piece 1c inserted in the through-hole 2c is inclined with respect to the 1st, 2nd piece 2a, 2b, the both ends of the width direction of the attachment tongue piece 1c will be in the inner surface of the through-hole 1c. As the gaps S1 and S2 approach, the circuit board 2 has a small positional shift in both the X and Y directions, and when the inclination of the mounting tongue 1c is 45 degrees, the gaps S1 and S2 are equal. Thus, the positional deviation of the circuit board 2 can be minimized in both the X and Y directions.

  In the above embodiment, the through hole 2c may be provided on the second side 2b side, and the inclination of the mounting tongue 1c may be other than 45 degrees.

  In the present invention, the attachment member 1 is formed of a frame for attaching the circuit board 2, the frame has side walls arranged in a quadrangular shape, and the support plate 1 b It may be formed of side walls arranged along the first and second sides 2a and 3b.

  5 and 6 show a second embodiment of the circuit board mounting structure according to the present invention. The second embodiment will be described. The mounting member 1 is formed by a cover for mounting the circuit board 2. In addition, the cover that is the mounting member 1 has a side wall that is the support plate 1e arranged in an octagonal shape, and is inclined with respect to each of the first and second sides 2a and 2b of the circuit board 2. An attachment tongue piece 1d that projects linearly from the end is formed on the support plate 1e made of the side wall.

  When the mounting tongue 1d is inserted into the through hole 2c, the mounting tongue 1d is arranged in a state inclined at 45 degrees with respect to the first and second sides 2a, 2b. As in the first embodiment, the positional deviation of the circuit board 2 can be reduced.

  Other configurations have the same configurations as those of the above-described embodiment, and the same parts are denoted by the same reference numerals, and the description thereof is omitted here.

1 is a front view of a circuit board mounting structure according to a first embodiment of the present invention, partly cut away. It is a bottom view which concerns on 1st Example of the attachment structure of the circuit board of this invention. FIG. 4 is an exploded perspective view of the circuit board mounting structure according to the first embodiment of the present invention in an inverted state. It is a principal part enlarged plan view which concerns on 1st Example of the circuit board attachment structure of this invention, and shows the state of an attachment hole and an attachment tongue piece. It is a top view which concerns on 2nd Example of the attachment structure of the circuit board of this invention. It is a bottom view which concerns on 2nd Example of the attachment structure of the circuit board of this invention. It is principal part sectional drawing which concerns on the attachment structure of the conventional circuit board. It is a top view which shows the relationship between the circuit board and frame which concern on the attachment structure of the conventional circuit board. It is a principal part enlarged plan view which concerns on the attachment structure of the conventional circuit board, and shows the state of an attachment hole and an attachment tongue piece.

Explanation of symbols

1 Mounting member (cover)
1a Castle wall 1b Support plate (side wall)
DESCRIPTION OF SYMBOLS 1c Arm part 1d Mounting tongue piece 2 Circuit board 2a 1st edge | side 2b 2nd edge | side 2c Through-hole 3 Land part 4 Wiring pattern 5 Electronic component S1, S2 Crevice

Claims (6)

A circuit board having a plurality of circular mounting holes and a mounting member for mounting the circuit board, the circuit board having a pair of first sides parallel to each other and the first side The mounting hole provided in the circuit board has a rectangular shape having a pair of second sides that are perpendicular to each other and parallel to each other, and each of the mounting holes provided on either one of the first and second sides is opposed to each other. The mounting member is disposed in the vicinity of the side, and the mounting member includes a support plate disposed at a distance from each other, and a mounting tongue formed on the support plate and inserted into the mounting hole. A circuit board mounting structure, wherein the circuit board is mounted on the mounting member by being inserted into the mounting hole in a state inclined with respect to each of the first and second sides. The circuit board mounting structure according to claim 1, wherein a plurality of the mounting holes are provided in the vicinity of the opposing sides. 3. The circuit board mounting structure according to claim 1, wherein the mounting tongue piece is disposed at an angle of 45 degrees with respect to each of the first and second sides. 4. The circuit board attachment according to claim 1, wherein a land portion for soldering the attachment tongue piece is provided around the attachment hole of the circuit board. 5. Construction. The attachment member is formed of a frame body or a cover for attaching the circuit board, and the frame body or the cover has a side wall arranged in a square shape, and the support plate is formed of the circuit board. 5. The circuit board mounting structure according to claim 1, wherein the circuit board mounting structure is formed by the side walls disposed along the first and second sides of the board. 6. The attachment member is formed by a cover for attaching the circuit board, the cover has an octagonal side wall, and the support plate is provided on each of the first and second sides. The circuit board mounting structure according to any one of claims 1 to 4, wherein the circuit board mounting structure is formed of the side wall that is inclined with respect to the side wall.

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