JP2017168546A - Printed board unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of holding the mating state of connectors of the master board and slave board in a printed board unit, even when there is not enough free space in the peripheral region of the slave board in the master board.SOLUTION: A printed board unit includes a master board having a master board side connector, a slave board mounted on the mounting surface of the master board, and having a slave board side connector mating with the master board side connector, a cover body attached to the slave board, and covering the mating part of the master board side connector and slave board side connector, and a mating holding member having locking parts provided on the opposite sides of the cover body, and inserted into through holes provided in the master board and locked thereto.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a printed circuit board unit.

  A fitting connection structure using a connector is widely used as a connection structure of a child board to a parent board in a printed circuit board unit. In recent years, with the miniaturization of the sub board, only necessary electronic components and connectors are often mounted on the sub board. In such a case, the child board is fixed to the parent board only by fitting with the connector. For this reason, when an impact, vibration, or the like due to dropping or the like acts, there is a possibility that the connectors are disconnected from each other.

Japanese Utility Model Publication No. 1-165684

  As a measure for preventing the connectors from being disconnected from each other, a method of fixing the child board to the parent board using an adhesive tape after the child board is connected to the parent board by a connector is conceivable. For example, a method of attaching the adhesive tape across both the parent substrate and the child substrate, such as attaching both ends of the adhesive tape to the surface of the parent substrate while applying the adhesive tape so as to cover the upper surface of the child substrate, is conceivable. . However, this method is sufficient if there is sufficient free space in the peripheral area of the sub board fixed to the main board, but the peripheral area of the sub board is a part of another electronic component, another sub board, or a case. It is considered difficult to apply if it is occupied by, for example.

  This case has been made in view of the above problems, and the mating state of the connectors of the mother board and the child board in the printed circuit board unit is not sufficient even when there is not enough free space in the peripheral area of the mother board. The purpose is to provide technology that can be retained.

  According to one aspect of the present invention, a main board having a main board side connector, a sub board having a sub board side connector that is mounted on the mounting surface of the main board and fits with the main board side connector, and the sub board A cover body that is mounted and covers a fitting portion between the mother board side connector and the child board side connector, and is provided on both sides of the cover body and is inserted into a through-hole provided in the mother board and is inserted into the mother board. There is provided a printed circuit board unit including a fitting holding member having a locking portion to be locked to the substrate.

  According to this case, the fitting state of the connectors of the mother board and the child board in the printed circuit board unit can be held even when there is not enough free space in the peripheral area of the mother board.

FIG. 1 is a perspective view illustrating an electronic apparatus including the printed circuit board unit according to the first embodiment. FIG. 2 is a perspective view illustrating an electronic apparatus including the printed circuit board unit according to the first embodiment. FIG. 3 is a schematic diagram of a daughter board according to the first embodiment. FIG. 4 is a view for explaining connector connection between the parent board and the child board according to the first embodiment. FIG. 5 is a perspective view of the fitting holding member according to the first embodiment according to the first embodiment. FIG. 6 is a view illustrating a sheet material for forming the fitting holding member according to the first embodiment. FIG. 7 is a diagram for explaining a fixing procedure of the child board using the fitting holding member according to the first embodiment. FIG. 8 is a diagram illustrating a fitting holding member and a printed circuit board unit according to the second embodiment. FIG. 9 is a diagram illustrating a printed circuit board unit according to the third embodiment. FIG. 10 is a diagram illustrating a printed circuit board unit according to the third embodiment. FIG. 11 is a perspective view showing a fitting holding member according to the third embodiment. FIG. 12 is a vertical cross-sectional view of the fitting holding member according to the third embodiment. FIG. 13 is a view showing a fitting holding member according to a modification of the third embodiment. FIG. 14 is a view for explaining a method of mounting the fitting holding member on the child board according to the modification of the third embodiment. FIG. 15 is a diagram illustrating a printed circuit board unit according to the fourth embodiment. FIG. 16 is a diagram for explaining a method of mounting the fitting holding member on the child board according to the fourth embodiment. FIG. 17 is a diagram illustrating a printed circuit board unit according to the fifth embodiment. FIG. 18 is a diagram illustrating a fitting holding member according to the fifth embodiment. FIG. 19 is a view for explaining a method of mounting the fitting holding member on the child board according to the fifth embodiment.

  Hereinafter, an embodiment of a printed circuit board unit will be described with reference to the drawings.

<Embodiment 1>
1 and 2 are perspective views illustrating an electronic device 100 including the printed circuit board unit 1 according to the first embodiment. The electronic device 100 is a tablet terminal, for example. FIG. 1 shows the front side of the electronic device 100, where 101 is a touch panel display and 102 is a housing. FIG. 2 shows the back side of the electronic device 100 and shows a state where the back cover is removed.

  A printed circuit board unit 1 is provided inside the housing 102 of the electronic apparatus 100. The printed circuit board unit 1 includes a parent substrate 10 and a child substrate 20 mounted on the parent substrate 10. The parent board 10 is, for example, a mother board (main board), and various electronic components are mounted in addition to the child board 20. Reference numeral 10a in FIG. 2 is a mounting surface of the parent substrate 10, and the child substrate 20 is mounted on the mounting surface 10a. Reference numeral 30 in FIG. 2 denotes a fitting holding member. The fitting holding member 30 is a member that is used in a state of being mounted on the child board 20 and holds the fitting state between the connectors of the parent board 10 and the child board 20.

FIG. 3 is a schematic view of the daughter board 20 according to the first embodiment. Reference numeral 20 a is a lower surface of the daughter board 20, and reference numeral 20 b is an upper face of the daughter board 20. In the present embodiment, the sub board 20 has a rectangular planar shape, but is not limited thereto. Further, on the lower surface 20a of the sub board 20, a chip component 21 which is an electronic component, a sub board side connector 22 and the like are mounted. The chip component 21 is, for example, a security chip. Hereinafter, in the sub-board 20, the end portion on which the sub-board-side connector 22 is provided is referred to as “front” for convenience, and the opposite end portion is referred to as “rear”. The sub board side connector 22 is electrically connected to the chip component 21 through an internal wiring. A height adjusting member 23 is provided on the lower surface 20 a of the sub board 20. The height adjustment member 23 of the sub board 20 is a member whose height from the lower surface 20 a is adjusted to be approximately equal to that of the sub board side connector 22. Note that the fitting holding member 30 shown in FIG. 2 is mounted on the upper surface 20b side of the subsidiary board 20.

  FIG. 4 is a diagram for explaining connector connection between the parent board 10 and the child board 20 according to the first embodiment. A parent board side connector that is electrically connected to the chip component 21 of the sub board 20 by fitting with the sub board side connector 22 provided on the lower surface 20 a of the sub board 20 on the mounting surface 10 a of the main board 10. 12 is provided. The mounting surface 10 a of the parent substrate 10 and the lower surface 20 a of the child substrate 20 are brought close to each other, and the child substrate side connector 22 is pressed against the parent substrate side connector 12. As a result, the connectors are fitted and connected, and the child board 20 can be electrically and mechanically connected to the parent board 10. Hereinafter, the parent board side connector 12 of the parent board 10 and the sub board side connector 22 on the sub board 20 side that is fitted and connected to the parent board side connector 12 are collectively referred to as a “connector portion CN”.

  By the way, if the child board 20 is fixed to the parent board 10 by relying only on the fitting of the connector part CN, for example, when the shock or vibration due to dropping of the parent board 10 is applied, the fitting of the connector part CN is performed. May come off. Therefore, the printed circuit board unit 1 according to the present embodiment uses the fitting holding member 30 to hold the fitting state of the connector part CN of the parent board 10 and the child board 20. Hereinafter, the detail of the fitting holding member 30 is demonstrated.

  FIG. 5 is a perspective view of the fitting holding member 30 according to the first embodiment. The fitting holding member 30 is a member attached to the upper surface 20 b of the sub board 20, and includes a cover main body 31 and a pair of locking portions 32 provided on both side portions 311 and 312 of the cover main body 31. Although the material of the fitting holding member 30 is not specifically limited, For example, a polyethylene terephthalate (PET) etc. can be used. For example, as shown in FIG. 6, the sheet material S is produced using PET, and the fitting holding member 30 as shown in FIG. 5 is obtained by folding it along the folding line L1. Although the thickness of the fitting holding member 30 is not particularly limited, for example, the lightweight fitting holding member 30 can be obtained by folding the sheet material S having a thickness of about 0.1 to 0.2 mm.

  The cover main body 31 of the fitting holding member 30 is a member for covering at least a region corresponding to the connector portion CN (fitting portion between the sub board side connector 22 and the main board side connector 12) of the upper surface 20b of the sub board 20. It is. In the present embodiment, when the fitting holding member 30 is mounted on the child board 20, the “connector part covering region 31a” indicated by reference numeral 31a in FIG. 5 corresponds to the connector part CN on the upper surface 20b of the child board 20. It covers the area. In FIG. 5, the range of the connector covering region 31a is hatched. In the present embodiment, the connector portion covering region 31a is formed as a rectangular region, but is not limited thereto. In the present embodiment, a pair of locking portions 32 are provided on both side portions 311 and 312 of the connector portion covering region 31a. In the present specification, for convenience, in the cover main body 31 of the fitting holding member 30, the one provided with the connector portion covering region 31 a is defined as “front”, and the opposite side is defined as “rear”.

  Next, the pair of locking portions 32 in the fitting holding member 30 will be described. The pair of locking portions 32 in the fitting holding member 30 are inserted into a pair of slide holes 13 (see FIG. 2) provided in the parent substrate 10 and are not mounted on the opposite side of the mounting surface 10a in the parent substrate 10. Locked to the surface 10b (see FIG. 4). The slide hole 13 is a long hole that penetrates the parent substrate 10 in the thickness direction, and is an example of a through hole. The pair of slide holes 13 are arranged in parallel to each other.

The locking portion 32 is formed with a U-shaped groove 32 a that opens in a U shape toward the rear of the fitting holding member 30. The locking portion 32 includes a base portion 32b provided in the connector portion covering region 31a of the cover main body 31, a slide insertion portion 32c having a narrower width than the base portion 32b, and a claw portion 32d positioned on the distal end side of the locking portion 32. have. The groove width W <b> 1 of the U-shaped groove 32 a in the height direction of the locking part 32 is set to be slightly larger than the thickness dimension of the parent substrate 10. Further, the internal dimension W2 at which the pair of locking portions 32 are separated from each other is set to be the same as or slightly larger than the lateral width W3 (see FIG. 3) of the sub board 20. Further, the center-to-center distance between the pair of locking portions 32 in the fitting holding member 30 is equal to the center-to-center distance between the pair of slide holes 13 in the parent substrate 10.

  FIG. 7 is a diagram illustrating a fixing procedure of the sub board 20 using the fitting holding member 30 according to the first embodiment. FIG. 7A shows a state in which the sub board side connector 22 of the sub board 20 is fitted to the main board side connector 12 of the main board 10. FIG. 7B shows an unlocked state in which the pair of locking portions 32 in the fitting holding member 30 are arranged at the first positions of the pair of slide holes 13. FIG. 7C shows a locked state in which the pair of locking portions 32 in the fitting holding member 30 is disposed at the second position of the pair of slide holes 13.

  First, as shown in FIG. 7A, the sub board side connector 22 of the sub board 20 is fitted to the main board side connector 12 of the main board 10. Next, as shown in FIG. 7B, the fitting holding member is fitted to the upper surface 20 b of the sub board 20 while inserting the pair of locking portions 32 in the fitting holding member 30 into the pair of sliding holes 13 in the parent board 10. 30 cover bodies 31 are placed. In the state where the cover main body 31 is placed on the upper surface 20b of the sub board 20, the fitting holding member 30 is positioned in the height direction in the U-shaped groove part 32a and the slide insertion part 32c of each locking part 32. Designed to match. In FIG. 7B, the pair of locking portions 32 (slide insertion portions 32 c) are located at the first positions in the pair of slide holes 13. In a state where the slide insertion portion 32 c in the pair of locking portions 32 is in the first position, the claw portion 32 d is not locked to the non-mounting surface 10 b of the parent substrate 20.

  Next, for example, the cover main body 31 of the fitting holding member 30 is gripped, the cover main body 31 is slid toward the rear side of the sub board 20 along the upper surface 20b of the sub board 20, and the pair of locking portions 32 is moved. The pair of slide holes 13 are moved to the second position. This second position is an example of a locking position.

  Here, the groove width W <b> 1 of the U-shaped groove portion 32 a in each locking portion 32 of the fitting holding member 30 is larger than the thickness dimension of the parent substrate 10. Therefore, the edge 13a (see FIG. 7A) on one end side of the slide hole 13 enters the U-shaped groove 32 along with the slide operation. When the edge portion 13a of the slide hole 13 comes into contact with the slide insertion portion 32c of the locking portion 32, further sliding operation is restricted, and the pair of locking portions 32 (slides) in the fitting holding member 30 are controlled. The insertion portion 32c) is positioned at the second position (see FIG. 7C). With the pair of locking portions 32 (slide insertion portion 32c) in the fitting holding member 30 positioned at the second position, the claw portion 32d of the locking portion 32 is embedded in the non-mounting surface 10b of the parent substrate 10. . That is, in this state, the locking portion 32 (claw portion 32 d) of the fitting holding member 30 is locked to the non-mounting surface 10 b (the edge portion 13 a of the slide hole 13) of the parent substrate 10.

  According to this, even when a force acts in a direction in which the parent substrate 10 and the child substrate 20 are separated from each other, the locking portion 32 (claw portion 32d) of the fitting holding member 30 is engaged with the non-mounting surface 10b of the parent substrate 10. Since it is stopped, it is possible to prevent the parent substrate 10 and the child substrate 20 from separating. That is, according to the printed circuit board unit 1 according to the present embodiment, it is possible to prevent the child substrate 20 from separating from the parent substrate 10 even when an impact or vibration due to dropping or the like is applied. It can suppress that the fitting of the connector part CN of the board | substrate 20 remove | deviates.

In particular, the fitting holding member 30 has a pair of locking portions 32 provided on both sides of the cover main body 31 (connector portion covering region 31 a) that covers the upper surface of the sub board 20.
So that the non-mounting surface 10b of the parent substrate 10 is locked. According to this, the fitting state of the connector part CN of the parent substrate 10 and the child substrate 20 can be maintained without occupying the periphery of the child substrate 20 in the mother substrate 10. Therefore, even when there is not enough empty space in the peripheral area of the sub board 20 in the main board 10, it is possible to prevent the connector part CN of the main board 10 and the sub board 20 from being disconnected. When removing the sub board side connector 22 from the main board side connector 12, the locking portion 32 of the fitting holding member 30 is slid along the slide hole 13 and moved from the second position to the first position. . Thereby, since the latching of the latching portion 32 (claw portion 32d) with respect to the non-mounting surface 10b of the parent substrate 20 is released, the fitting holding member 30 is lifted from the child substrate 20 by lifting the fitting holding member 30. Can be withdrawn. As a result, the sub board side connector 22 can be easily detached from the main board side connector 12.

<Embodiment 2>
Next, Embodiment 2 will be described. FIG. 8 is a diagram illustrating the fitting holding member 30A and the printed circuit board unit 1A according to the second embodiment. In this embodiment, members that are the same as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The fitting holding member 30A according to the second embodiment is a fitting holding member according to the first embodiment in that the cover body 31 is provided with a fixing means for fixing the pair of locking portions 32 to the second position described above. 30. Specifically, the fitting holding member 30A includes an adhesive tape 33 as a fixing means, and the cover main body 31 is bonded to the upper surface 20b of the sub board 20A by the adhesive tape 33. As a result, the pair of locking portions 32 can be fixed at the second position in a state where the fitting holding member 30A is mounted on the child board 20A. The adhesive tape 33 is, for example, a double-sided tape, and is bonded to the upper surface 20b of the sub board 20A and the lower surface of the cover main body 31 in the fitting holding member 30A. According to the fitting holding member 30A in the present embodiment, since the pair of locking portions 32 are fixed to the second position by the adhesive tape 33, each locking portion 32 is inadvertently moved from the second position to the first position. Can be prevented from sliding. Thereby, even if an impact, vibration, or the like due to dropping or the like acts on the printed circuit board unit 1, it is possible to more suitably suppress the disengagement of the connector portion CN of the main board 10 and the sub board 20A. .

<Embodiment 3>
Next, Embodiment 3 will be described. 9 and 10 are diagrams illustrating the printed circuit board unit 1B according to the third embodiment. 9 shows a perspective view of the printed circuit board unit 1B, and FIG. 11 shows a sectional view of the printed circuit board unit 1B. FIG. 11 is a perspective view showing a fitting holding member 30B according to the third embodiment. In the third embodiment, members that are the same as those in the previous embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  The fitting holding member 30B in the third embodiment has a spring portion 34 as a fixing means for fixing the locking portion 32 to the second position. The spring part 34 is a spring member protruding from the front end side of the cover main body 31 (connector part covering region 31a) in the cover main body 31, and is an example of an urging means.

  Reference numeral 40 in FIGS. 9 and 10 denotes an immovable member, which is a part of the housing 102 in this embodiment. Specifically, for example, the immovable member 40 is a wall body projecting from the inner surface of the housing 102 and extends to the vicinity of the front end of the child substrate 20 so as to face the mounting surface 10a of the parent substrate 10. . However, the immovable member 40 may be a member whose relative position with respect to the parent substrate 10 is fixed, and may be, for example, another electronic component fixed to the mounting surface 10 a of the parent substrate 10. 9 and 10, a part of the immovable member 40 is shown.

The fitting holding member 30 </ b> B in the present embodiment is provided with a holding claw 32 e on the inner wall surface of the base portion 32 b in each locking portion 32. FIG. 12 is a longitudinal sectional view at a position passing through the holding claws 32e of the fitting holding member 30B according to the third embodiment. As shown in FIG. 12, the holding claw 32e has a triangular longitudinal section, and has an inclined surface 32e1 and a horizontal support surface 32e2. The inclined surface 32e1 of the holding claw 32e places the cover main body 31 on the upper surface 20b of the sub board 20, and the side portions 311 and 3 in the sub board 20B when the locking portion 32 is inserted into the slide hole 13 of the main board 10.
Reference numeral 12 denotes a sliding surface. By inclining the inclined surface 32e1 as shown in FIG. 12, the locking portion 32 can be inserted into the slide hole 13 while the base portions 32b of the pair of locking portions 32 are slightly expanded by the both side surfaces of the child substrate 20B. it can. When the cover main body 31 of the fitting holding member 30B is placed on the upper surface 20b of the child board 20B, the child board 20B gets over the inclined surface 32e1, and the lower surface 20a of the child board 20B is hooked on the horizontal support surface 32e2. Supported.

  Thereafter, as in the first embodiment, the cover main body 31 of the fitting holding member 30B is slid rearward along the upper surface 20b of the sub board 20B, and the pair of locking portions 32 are inserted into the first of the pair of sliding holes 13. Move to 2 position. Thereby, the claw portions 32d of the pair of locking portions 32 in the fitting holding member 30B are locked to the non-mounting surface 10b (the edge portion 13a of the slide hole 13) of the parent substrate 10.

  Next, the effect | action of the spring part 34 in the fitting holding member 30B is demonstrated. The spring portion 34 in the fitting holding member 30B is a spring member having a substantially V shape. When the fitting holding member 30B (locking portion 32) is slid from the first position to the second position, the tip end portion 34a of the spring portion 34 comes into contact with the side surface 40a of the immobile member 40 as shown in FIG. Are accommodated in a space between the stationary member 40 and the fitting holding member 30B. As described above, when the spring portion 34 is interposed between the stationary member 40 and the cover main body 31 in a contracted state, the restoring force for the spring portion 34 to return to the original shape is applied to the cover main body 31 and the stationary main body 31. Acts on the member 40. As a result, an urging force (elastic force) for separating the cover main body 31 of the fitting holding member 30B from the immovable member 40 acts on the cover main body 31, and the fitting holding member 30B (locking portion 32). Can be fixed (maintained) at the second position. As a result, even if an impact or vibration due to dropping or the like of the electronic device 100 acts on the printed circuit board unit 1B, the child substrate 20B can be prevented from separating from the parent substrate 10, and the connector portion CN is disengaged. This can be suppressed.

  When the child board side connector 22 is removed from the parent board side connector 12, the tip 34a of the spring part 34 sandwiched between the cover main body 31 and the stationary member 40 in the fitting holding member 30B is pulled out, and the spring The fixing by the part 34 is released. As a result, the locking portion 32 of the fitting holding member 30B can be slid along the slide hole 13 and moved from the second position to the first position, and the non-mounting surface 10b of the parent substrate 20 can be moved. The locking of the locking part 32 (claw part 32d) can be released. As a result, the fitting connection of the connector part CN of the parent board 10 and the child board 20B can be easily removed.

  The fitting holding member 30B holds the child board 20B by the holding claws 32e of the respective locking portions 32. Therefore, after moving the locking portion 32 from the second position to the first position, the child board side connector 22 can be easily moved from the parent board side connector 12 by lifting the fitting holding member 30B and the child board 20B together. Can be removed.

<Modification>
Further, as a modification of the third embodiment, a fitting holding member 30C shown in FIG. 13 may be used. In the fitting holding member 30 </ b> C, a stopper portion 35 protrudes from the front end of the cover body instead of the spring portion 34. The stopper portion 35 is a member that is interposed between the cover main body 31 and the immobile member 40 and fixes the locking portion 32 to the second position. FIG. 14 is a diagram for explaining a method of mounting the fitting holding member 30C according to the modification on the child board 20C. FIG. 14A shows a state before the fitting holding member 30C is mounted on the child board 20C. In this state, the sub board side connector 22 of the sub board 20C is fitted to the main board side connector 12. 14A, the cover main body 31 of the fitting holding member 30C is placed on the upper surface 20b of the sub board 20C, and the pair of locking portions 32 are inserted into the pair of slide holes 13 in the parent board 10. (See FIG. 14 (b)). In the state shown in FIG. 14B, the tip 35 a side of the stopper portion 35 is in a state of riding on the upper surface 40 b of the immovable member 40.

  Next, the cover main body 31 of the fitting holding member 30C is gripped, and each locking portion 32 inserted through the slide hole 13 is slid from the first position to the second position (see FIG. 14C). As a result, the pair of locking portions 32 (claw portions 32d) in the fitting holding member 30C are locked to the non-mounting surface 10b (the edge portion 13a of the slide hole 13) of the parent substrate 10. Thereby, even when the mounting of the fitting holding member 30C to the child board 20C is completed and a force acts in a direction separating the mother board 10 and the child board 20, it is possible to prevent the connector part CN from being disengaged. Can do.

  In addition, the length dimension of the stopper part 35 in the fitting holding member 30C is a dimension equal to the separation dimension between the front end of the cover main body 31 and the side surface 40a of the stationary member 40 when the locking part 32 is positioned at the second position. Is set to Thereby, when the locking part 32 in the fitting holding member 30C is positioned at the second position, the tip 35a side of the stopper part 35 slides down from the upper surface 40b of the stationary member 40, and the front end of the cover body 31 and the stationary member 40 Is accommodated in a space sandwiched between the side surfaces 40a. As a result, as shown in FIG. 14C, the tip 35 a of the stopper portion 35 of the fitting holding member 30 </ b> C comes into contact with the side surface 40 a of the stationary member 40. Thus, the stopper part 35 interposed between the cover main body 31 and the immobile member 40 functions as a fixing means for fixing the locking part 32 to the second position. As a result, even if an impact or vibration due to dropping or the like acts on the printed circuit board unit 1C, it is possible to suppress the child substrate 20C from separating from the parent substrate 10 and to prevent the connector portion CN from being disengaged. .

  When removing the sub board side connector 22 from the board side connector 12, the stopper portion 35 sandwiched between the cover main body 31 and the stationary member 40 in the fitting holding member 30B is lifted and fixed by the stopper portion 35. To release. As a result, the locking portion 32 of the fitting holding member 30C can be slid along the slide hole 13 and moved from the second position to the first position, and the non-mounting surface 10b of the parent substrate 10C can be moved. The locking of the locking part 32 (claw part 32d) can be released. As a result, the fitting connection of the connector part CN of the parent board 10 and the child board 20 (FIG. 14C) can be easily removed.

<Embodiment 4>
Next, Embodiment 4 will be described. FIG. 15 is a diagram illustrating a printed circuit board unit 1D according to the fourth embodiment. In the fourth embodiment, members that are the same as those in the previous embodiments are denoted by the same reference numerals, and detailed description thereof is omitted. The fitting holding member 30D according to the fourth embodiment is provided with a locking hole 31b in the cover main body 31, and can engage the protruding member 200 protruding from the upper surface 20b of the sub board 20D. In the present embodiment, the protruding member 200 and the locking hole 31b have a square shape, but the shape and size can be changed as appropriate. As shown in FIG. 13, the locking hole 31 b of the cover main body 31 is disposed on the rear end side of the cover main body 31 (that is, the end portion where the connector portion covering region 31 a is not provided).

FIG. 16 is a diagram illustrating a mounting method of the fitting holding member 30D according to the fourth embodiment with respect to the child board 20D. The uppermost stage shows a state before the fitting holding member 30D is mounted on the child board 20D. From this state, the cover main body 31 of the fitting holding member 30 </ b> D is placed on the upper surface 20 b of the subsidiary board 20 </ b> D, and the pair of locking portions 32 are inserted into the pair of slide holes 13 in the parent board 10. Thereafter, the cover main body 31 of the fitting holding member 30D is gripped, and each locking portion 32 inserted through the slide hole 13 is slid from the first position to the second position.

  At that time, as shown in the middle of FIG. 16, the rear end side of the cover main body 31 is gripped and slightly lifted from the upper surface 20b of the sub board 20D, and the locking hole 31b of the cover main body 31 is formed in the protruding member 200 of the sub board 20D. Hook. Thereby, as shown in the lower part of FIG. 16, the fitting holding member 30D is completely attached to the child board 20D, and in this state, the cover main body 31 in the fitting holding member 30D with respect to the protruding member 200 of the child board 20D. The engaging hole 31b is engaged.

  Thereby, similarly to Embodiment 2, 3, the latching | locking part 32 in fitting holding member 30D can be fixed to a 2nd position (maintenance). Thereby, it can suppress that each latching | locking part 32 in fitting holding member 30D returns from a 2nd position to a 1st position carelessly. As a result, even if an impact or vibration due to dropping or the like acts on the printed circuit board unit 1D, it is possible to suppress the child board 20D from moving away from the parent board 10 and to prevent the connector portion CN from being disengaged. . Further, when the connector portion CN is disengaged, the rear end side of the fitting holding member 30D is gripped, and the locking hole 31b of the cover main body 31 and the protruding member 200 of the sub board 20D are fixed (engaged). Is released. As a result, the locking portion 32 of the fitting holding member 30D can be slid along the slide hole 13 and moved from the second position to the first position, and the non-mounting surface 10b of the parent substrate 10 can be moved. The locking of the locking part 32 (claw part 32d) can be released. As a result, the fitting connection of the connector part CN of the parent board 10 and the child board 20D can be easily removed.

  In the present embodiment, the locking hole 31b provided in the cover main body 31 of the fitting holding member 30D is formed as a through hole, but may be formed as a recess that can be engaged with the protruding member 200. In the present embodiment, the locking hole 31b of the fitting holding member 30D and the protruding member 200 of the subsidiary board 20D are examples of fixing means. The protruding member 200 provided on the child board 20D may be any protrusion that is fitted in the locking hole 31b of the fitting holding member 30D, and may be various components mounted on the upper surface 20b of the child board 20D, for example. May be.

<Embodiment 5>
Next, Embodiment 5 will be described. FIG. 17 is a diagram illustrating a printed circuit board unit 1E according to the fifth embodiment. FIG. 18 is a diagram illustrating a fitting holding member 30E according to the fifth embodiment. The fitting holding member 30 </ b> E is provided with a set of locking portions 32 for each of the side portions 311 and 312 in the cover main body 31. In other words, each side portion 311, 312 is provided with two locking portions 32. Hereinafter, a set of locking portions 32 provided on one side 311 of the cover body 31 will be referred to as a first locking portion 321 and a second locking portion 322. In addition, a set of locking portions 32 provided on the other side 312 of the cover body 31 is referred to as a third locking portion 323 and a fourth locking portion 324. As shown in FIG. 18, the first locking portion 321 and the second locking portion 322 are arranged back to back, and the claw portions 32 d of the first locking portion 321 and the second locking portion 322 are in opposite directions. It is extended toward. Similarly, the third locking portion 323 and the fourth locking portion 324 are arranged back to back, and the claw portions 32d of the third locking portion 323 and the fourth locking portion 324 extend in the opposite direction. It is installed.

FIG. 19 is a diagram for explaining a method of mounting the fitting holding member 30E according to the fifth embodiment on the child board 20E. The uppermost stage shows a state before the fitting holding member 30E is mounted on the child board 20E. As shown in the uppermost stage, the width W4 in the major axis direction of the slide hole 13 is a claw in the third locking portion 323 and the fourth locking portion 324 (the first locking portion 321 and the second locking portion 322). It is smaller (narrower) than the separation dimension (hereinafter referred to as “nail separation dimension”) W5 between the tips of the portion 32d. Therefore, as shown in the middle stage, the cover body 31 is deformed into a mountain fold. By deforming the cover main body 31 in this manner, the claw portion separation dimension W5 is reduced, and the claw portions 32d of the respective locking portions 321 to 324 can be inserted into the slide holes 13. Then, after the claw portions 32d of the respective locking portions 321 to 324 climb over the non-mounting surface 10b side of the parent substrate 10 through the slide holes 13, the shape of the cover main body 31 is restored. As a result, as shown in the lowermost stage, the claw part separation dimension W5 is wider than the width W4 in the long axis direction of the slide hole 13, and the claw parts 32d of the respective locking parts 321 to 324 are non-mounting surfaces of the parent substrate 10. 10b. Thereby, the fitting holding member 30E can be positioned and fixed to the subsidiary board 20E. As a result, even if an impact or vibration due to dropping or the like acts on the printed circuit board unit 1E, it is possible to suppress the child board 20E from separating from the parent board 10 and to prevent the connector portion CN from being disengaged. .

  Further, when the connector portion CN is unfitted, the cover main body 31 of the fitting holding member 30E is deformed into a mountain fold so that the engaging portions 321 to 324 are engaged with the non-mounting surface 10b of the parent substrate 10. The stop can be released, and the fitting holding member 30E mounted on the child board 20E can be easily removed.

  As described above, the fitting holding member and the printed circuit board unit according to the present embodiment have been described along the embodiment, but the present embodiment is not limited thereto. It is obvious to those skilled in the art that various changes, improvements, combinations, and the like are possible for the above-described embodiment.

DESCRIPTION OF SYMBOLS 1 ... Printed circuit board unit 10 ... Parent board 12 ... Parent board side connector 13 ... Slide hole 20 ... Sub board 21 ... Chip component 22 ... Sub board side connector 23- ··· Height adjustment member 30 ··· fitting holding member 31 ··· cover body 32 ··· locking portion 32a ··· U-shaped groove portion 32b ··· base portion 32c ··· slide insertion portion 32d ··· Claw part 33 ... Adhesive tape 34 ... Spring part 35 ... Stopper part 40 ... Immovable member 100 ... Electronic device CN ... Connector part

Claims (8)

A parent board having a parent board side connector;
A sub-board having a sub-board side connector that is mounted on the mounting surface of the main board and fits with the main board-side connector;
A cover body that is mounted on the child board and covers a fitting portion between the mother board side connector and the child board side connector, and is provided on both sides of the cover body and is inserted into a through hole provided in the mother board. A fitting holding member having a locking portion that is locked to the parent substrate;
Comprising
Printed circuit board unit.   The printed circuit board unit according to claim 1, wherein the locking portion is locked to a non-mounting surface opposite to the mounting surface of the parent substrate. The through hole has a long hole shape,
The locking portion is inserted into the through-hole and slidable along the through-hole, and is connected to the slide insertion portion and the locking portion is in the locking position. A claw portion to be locked to the parent substrate,
The printed circuit board unit according to claim 1.   The printed circuit board unit according to claim 3, further comprising fixing means for fixing the locking portion to the locking position. The fixing means includes biasing means connected to the cover body and interposed between the cover body and a predetermined immovable member.
The printed circuit board unit according to claim 4. The fixing means includes a stopper portion connected to the cover body and interposed between the cover body and a predetermined immovable member.
The printed circuit board unit according to claim 4. The fixing means includes a projecting member projecting from the upper surface of the child substrate, and a hole or a recess provided in the cover body and engageable with the projecting member.
The printed circuit board unit according to claim 4. The through hole has a long hole shape,
A set of the locking portions is provided for each of both sides of the cover body, and the claw portions in the set of the locking portions are extended in opposite directions,
The width in the major axis direction of the through hole is smaller than the distance between the tips of the claw portions in the set of the locking portions,
The fitting holding member is fixed to the child board by locking the claw part in each locking part to the parent board while deforming the cover body.
The printed circuit board unit according to claim 1.

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