JP2009267194A - Structure of connecting main board to subboard - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of connecting a main board to a subboard 2 in which the subboard 2 having a connector plug 5 is connected vertically to the main board, a soldered portion of a connector 7 connecting the subboard 2 to the main board is not damaged, and a straight connector plug can be used as the connector plug 5 on the subboard 2. <P>SOLUTION: According to the structure of connecting the main board to the subboard 2, a metal fixture has a plane portion having legs 3d, 3e, and 3f on its periphery, the legs 3d, 3e, and 3f positioning and fixing the plane portion in parallel with the main board, and downward projecting pieces 3d and 3f and upward projecting pieces 3a, 3b, and 3c are formed on the edge of the plane portion. The subboard 2 having the connector plug 5 is connected vertically to the main board using the metal fixture. The downward projecting pieces 3d and 3f and upward projecting pieces 3a and 3b act to support the subboard 2 to prevent it from falling as a result of insertion of an external device connector receptacle into the connector plug 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic apparatus, and more particularly, to a connection structure between a main board and a sub board.

  An example of a conventional connection structure between an electronic device main board and a sub board will be described with reference to FIG. FIG. 11A is a perspective view showing an example of a conventional connection structure between a main board and a sub board, and FIG. 11B is a perspective view of the connection structure example seen from the other direction.

  The sub board 21 shown in FIG. 11 is fixed to the main board 20 via the U-shaped metal fitting 24. In other words, the main board 20 is fixed to the U-shaped bracket 24 by inserting the slits and notches provided in the main board 20 through the protruding pieces 24a, 24a. The U-shaped metal fitting 24 is provided with convex pieces 24a, 24a... On the lower side, and is fixed to the main board 20 by the lower convex pieces.

  In this way, the sub board 21 and the main board 20 are fixed to the U-shaped bracket 24. The integrated sub board 21 and main board 20 are fixed in the chassis. At this time, connectors (not shown in FIG. 11) provided on the sub board 21 and the main board 20 are fitted. Thus, the circuits of the sub board 21 and the main board 20 are connected.

  A connector plug 22 is mounted on the sub-board 21, and an external device is connected to the sub-board 21 by inserting a connector receptacle of the external device into the convex portion 23 of the connector plug 22. Note that external devices such as an external memory connected to the connector plug 22 are not shown in FIG.

  Thus, the sub board 21 is fixed so as to be parallel to the main board 20. That is, when the sub board 21 is fixed in a state of being perpendicular to the main board 20, the connector plug 22 is perpendicular to the sub board 21 when the connector receptacle of the external device is inserted into or pulled out of the connector plug 22. This is because a directional force is applied, a large bending moment acts on the joint between the sub-board 21 and the main board 20, and the soldered portion of the connector may be damaged.

  However, if the sub-board 21 is fixed so as to be parallel to the main board 20, components cannot be mounted on a wide portion of the main board 20 covered with the sub-board 21, and a connector mounted on the sub-board 21 is not possible. There has been a problem that a straight type connector plug in which a connector receptacle is inserted into or pulled out from the sub board 21 in a direction perpendicular to the sub board 21 cannot be used.

  The present invention has been made in view of the above-described points, and an object of the present invention is to connect a sub board provided with a connector plug in a direction perpendicular to the main board, and the sub board and the main board. It is an object of the present invention to provide a connecting structure between a main board and a sub board that can use a straight type connector plug for the sub board without damaging the soldering portion of the connector that connects to the sub board.

  In the connecting structure of the main board and the sub board according to the present invention, the flat part has a leg part around the flat part and is positioned and fixed by the leg part so that the flat part is parallel to the main board. In the connecting structure of the main board and the sub board in which the sub board provided with the connector plug is connected to the main board in a direction perpendicular to the main board using a metal fitting provided with a downward convex piece and an upward convex piece at the edge of The convex pieces and the upward convex pieces act to support the fall of the sub-board due to the insertion of the connector receptacle of the external device into the connector plug.

  In the connection structure between the main board and the sub board, at least one of the downward convex piece and the upward convex piece regulates the movement of the sub board in the plane parallel direction.

  Further, in the connection structure between each main board and the sub board, the sub board is temporarily fixed to the main board by a connector for connecting the sub board and the main board.

  Further, in the connection structure between each main board and the sub board, the sub board is supported in a direction opposite to a direction in which the sub board is inclined by inserting a connector receptacle of an external device by a holder fixed to the chassis.

  Further, in the connection structure of each main board and the sub board, the ground pattern of the sub board is grounded to the chassis by the metal fitting.

  According to the connecting structure of the main board and the sub board of the present invention, the surface of the main board can be widely used as a component mounting surface, and a straight type connector plug can be used for the sub board.

  The best mode for carrying out the present invention will be described below with reference to examples.

  FIG. 1A is a perspective view showing a mounting position relationship of main components of a connecting structure of a main board and a sub board according to Embodiment 1 of the present invention, and FIG. 1B shows the mounting position relation from another direction. 2A is a perspective view showing the mounting state of the main part, FIG. 2B is a perspective view of the mounting state of the main part from the other direction, and FIG. 3A is FIG. The perspective view which shows the state which attached the member to another main component, FIG.3 (b) is the perspective view which looked at the same state from the other direction.

  4A is a perspective view showing a holder for fixing the member shown in FIG. 2 to the chassis, FIG. 4B is a perspective view of the holder seen from the other direction, and FIG. 5A is a view showing the member shown in FIG. The perspective view which shows the positional relationship fixed to a holder, FIG.5 (b) is the perspective view which looked at the positional relationship from the other direction.

  6A is a perspective view showing the positional relationship of the metal fitting for fixing the member shown in FIG. 5 to the holder, FIG. 6B is a perspective view of the same positional relationship seen from the other direction, and FIG. FIG. 7B is a perspective view of the attachment state seen from the other direction, and FIG. 8 is a perspective view showing the positional relationship of attaching the members shown in FIG.

  First, the assembled state of the main board 1, the sub board 2, the metal fitting 3, and the holder 11 will be described with reference to FIGS. As will be described later, the main board 1 and the sub board 2 are fixed via a holder 11 shown in FIGS. 4 to 7. However, in order to make the drawing easier to see, FIGS. 3, the positional relationship between the main board 1 and the sub board 2 will be described.

  As shown in FIG. 1, a straight type connector plug 5 is mounted on the sub-board 2, and a sub-board connection cord 9 is connected. A connector receptacle provided in an external device such as an external memory is attached to and detached from the convex portion 6 of the connector receptacle 5. Note that a surface of the sub-board 2 on which the connector plug 5 is mounted is referred to as a front surface. A sub-board-side connector 7 is mounted on the back surface of the sub-board 2.

  An upward long convex piece 3a, an upward short convex piece 3b, an upward side convex piece 3c and a downward side convex piece 3d, a downward side convex piece 3e, and a downward central convex piece 3f are formed on the edge of the metal fitting 3 shown in FIG. The L-shaped convex piece 3h is provided with a hole 3g.

  In the state where the metal fitting 3 and the sub board 2 shown in FIG. 2 are assembled, the back surface of the sub board 2 faces the upward long convex piece 3a, the upward short convex piece 3b, and the upward side convex piece 3c of the metal fitting 3, and the metal fitting 3 The sub board 2 is sandwiched between the metal fittings 3 so that the downward side convex piece 3d and the downward central convex piece 3f face the back surface of the sub board 2.

  In this way, each convex piece of the metal fitting 3 comes into contact with the front and back surfaces of the sub-board 2, so that the bending moment when the connector receptacle of the external device is inserted into the connector plug 5 is caused by each convex piece at the lower end of the sub-board 2. Supported.

  In a state where the metal fitting 3 and the sub board 2 shown in FIG. 3 are assembled to the main board 1, the downward side convex piece 3d, the downward side convex piece 3e, and the downward central convex piece 3f of the metal fitting 3 are the main board 1 shown in FIG. It is inserted into a slit that is not visible or a notch that is visible on the right side in FIG. 3A and is positioned in the plane parallel direction with respect to the main substrate 1, and the main substrate is formed by a step portion formed at the lower end of each convex piece. Positioning in the height direction with respect to 1 is performed.

  Then, when the main board side connector 8 mounted on the main board 1 is fitted and temporarily fixed to the sub board side connector 7, the board assembly 4 is formed. In the state shown in FIG. 3, the hole 3 g of the metal fitting 3 and the hole surrounded by the ground pattern provided in the main board 1 (not visible in FIG. 3) are coaxial.

  Next, a state where the substrate assembly 4 and the metal fitting 3 temporarily fixed as described above are fixed via the holder 11 will be described with reference to FIGS. 4 to 7, (b) shows a state in which the holder 11 is turned upside down from the state shown in (a). First, the sub board 2 shown in FIG. 5 is attached to the holder 11 with the main board 1 removed.

  At this time, in the posture shown in FIG. 5, the sub-board 2 is positioned on the holder 11, and the lower end of the sub-board 2 in FIG. 5B is locked to the locking projection 11 c of the holder 11. In this state, the screw 14 that is inserted through the hole of the sub-board 2 is screwed into the screw hole of the horizontal boss 11 b of the holder 11.

  Next, in the posture shown in FIG. 6, the metal fitting 3 is positioned on the holder 11, and the convex piece of the metal fitting 3 is engaged with the upper end portion of the sub-substrate 2 in FIG. The screw 14 that passes through the third hole is screwed into the screw hole of the vertical boss 11 a of the holder 11. FIG. 7 shows a state where the sub-board 2 and the metal fitting 3 are fixed to the holder 11 in this way.

  Further, the main board side connector 8 of the main board 1 is inserted into the sub board side connector 7 of the sub board 2. This state is shown in FIG. 8 with the holder 11 omitted. At this time, the hatched portions of the upwardly projecting pieces 3 a and 3 b of the metal fitting 3 shown in FIG. 1B are pressed against the ground pattern of the sub-board 2.

  In this manner, the sub-board 2 is inserted into the screw hole 10a of the chassis 10 by screwing a screw inserted through the hole 3g of the metal board 3 and the hole of the main board 1 in a state where the sub-board 2, the main board 1 and the metal board 3 are integrated. The ground pattern of the main board 1 is grounded to the chassis 10. Then, the substrate assembly 4 is fixed to the chassis 10 by fastening the holder 11 to the chassis 10.

  The sub-board 2 of the board assembly 4 fixed in this manner is attached to the main board 1 in a vertical state, but is supported by the metal fitting 3 at a portion intersecting with the main board 1. Even if the connector receptacle of the external device is inserted into and removed from the connector plug 5, the soldered portion of the connector connecting the main board 1 and the sub board 2 is not damaged.

  Moreover, since the ground pattern of the sub-board 2 is grounded to the chassis 10, malfunction due to noise is prevented.

  FIG. 9A is a perspective view showing a metal fitting 12 having a connecting structure of a main board and a sub board according to Embodiment 2 of the present invention, and FIG. 9B is a perspective view showing the metal fitting 12 upside down. A screw hole 12 a is provided in the convex piece of the metal fitting 12. Other configurations of the metal fitting 12 are the same as those of the metal fitting 3 of the first embodiment. In the second embodiment, the metal fitting 12 is used instead of the metal fitting 3 in the first embodiment.

  And the screw | thread which penetrated the hole enclosed by the ground pattern of the sub-board | substrate 2 of Example 1 is screwed in the hole 12a, and the ground pattern of a sub-board | substrate is earth | grounded to a chassis. In this embodiment, since the ground pattern of the sub board is pressed against the metal fitting 12 with screws, the sub board is reliably grounded.

  FIG. 10A is a perspective view showing a metal fitting 13 having a connecting structure of a main board and a sub board according to Embodiment 3 of the present invention, and FIG. 10B is a perspective view showing the metal fitting 13 turned upside down. The metal fitting 13 is provided with a convex piece 13a. Other configurations of the metal fitting 13 are the same as those of the metal fitting 3 of the first embodiment. In the first embodiment, the metal fitting 13 is used instead of the metal fitting 3.

  The convex piece 13a is bent and soldered to the ground pattern of the sub-board 2 of the first embodiment, so that the ground pattern of the sub-board is grounded to the chassis. In this embodiment, since the ground pattern of the sub board is soldered to the metal fitting, the sub board is reliably grounded.

  The embodiment is configured as described above, but the invention is not limited thereto. For example, in order to fix the sub-board, the holder 11 is not used and the bracket is fixed using another bracket fixed to the chassis. Also good.

FIG. 1A is a perspective view showing a mounting position relationship of main components of a connecting structure of a main board and a sub board according to Embodiment 1 of the present invention, and FIG. 1B shows the mounting position relation from another direction. It is a perspective view. FIG. 2A is a perspective view showing a mounting state of the main component, and FIG. 2B is a perspective view of the mounting state of the main component from another direction. FIG. 3A is a perspective view showing a state in which the member shown in FIG. 2 is further attached to another main part, and FIG. 3B is a perspective view of the state seen from the other direction. 4A is a perspective view showing a holder for fixing the member shown in FIG. 2 to the chassis, and FIG. 4B is a perspective view of the holder seen from the other direction. FIG. 5A is a perspective view showing a positional relationship for fixing the member shown in FIG. 2 to the holder, and FIG. 5B is a perspective view of the positional relationship seen from the other direction. FIG. 6A is a perspective view showing a positional relationship of metal fittings for fixing the member shown in FIG. 5 to the holder, and FIG. 6B is a perspective view of the same positional relationship seen from the other direction. Fig.7 (a) is a perspective view which shows the attachment state of the metal fitting, FIG.7 (b) is the perspective view which looked at the attachment state from the other direction. It is a perspective view which shows the positional relationship which attaches the member shown in FIG. FIG. 9A is a perspective view showing the main parts of the connecting structure of the main board and the sub board according to the second embodiment of the present invention, and FIG. 9B is a perspective view of the main parts seen from the other direction. FIG. 10A is a perspective view showing the main parts of the connecting structure of the main board and the sub board according to the third embodiment of the present invention, and FIG. 10B is a perspective view of the main parts seen from the other direction. FIG. 11A is a perspective view showing an example of a conventional connection structure between a main board and a sub board, and FIG. 11B is a perspective view of the connection structure example seen from the other direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main board 2 Sub board 3 Metal fittings, 3a Upward long convex piece, 3b Upward short convex piece, 3c Upward side convex piece 3d Downward side convex piece, 3e Downward side convex piece, 3f Downward central convex piece, 3g Hole 3h L-shaped convex Piece 4 Substrate assembly 5 Connector plug 6 Protruding part 7 Sub board side connector 8 Main board side connector 9 Sub board connection cord 10 Chassis, 10a Screw hole 11 Holder, 11a Vertical boss, 11b Horizontal boss, 11c Locking convex part 12 Metal fitting, 12a Screw hole 13 Metal fitting, 13a Convex piece 14 Screw 20 Main board 21 Sub board 22 Connector plug 23 Convex part 24 C-shaped metal fitting, 24a Convex piece

Claims (5)

A metal fitting having a leg portion around the flat portion, and provided with a downward convex piece and an upward convex piece at the edge of the flat portion, which is positioned and fixed by the leg portion so that the flat portion is parallel to the main substrate. In the connecting structure of the main board and the sub board for connecting the sub board provided with the connector plug in a direction perpendicular to the main board, the downward convex piece and the upward convex piece are connected to the connector plug of the external device. A connection structure between a main board and a sub board, which acts to support the fall of the sub board due to insertion of a connector receptacle. 2. The connection structure between a main board and a sub board according to claim 1, wherein at least one of the downward convex piece and the upward convex piece regulates the movement of the sub board in the plane parallel direction. The connection structure of the main board and the sub board according to claim 1 or 2, wherein the sub board is temporarily fixed to the main board by a connector for connecting the sub board and the main board. The connection between the main board and the sub board according to any one of claims 1 to 3, wherein the sub board is supported by a holder fixed to the chassis in a direction opposite to a direction in which the sub board is inclined when a connector receptacle of an external device is inserted. Construction. The connection structure between the main board and the sub board according to claim 1, wherein the ground pattern of the sub board is grounded to the chassis by the metal fitting.

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