JP4173232B2 - PCB mounting structure to the housing - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printed circuit board mounting structure on a housing using a substrate guide rail for mounting the printed circuit board on the housing.
[0002]
[Prior art]
In a conventional case in which a plurality of other printed circuit boards, for example, a movable side printed circuit board and a fixed side printed circuit board are mounted before and after the mother board, the other plurality of printed circuit boards are mounted on the case. In addition, a substrate guide rail was used.
[0003]
The board guide rails are generally made of resin. For this reason, when connecting the ground patterns of the plurality of printed boards to the main chassis of the casing, the board guide rails are fixed to the plurality of printed boards. The metal panel was attached to the main chassis with screws.
[0004]
[Problems to be solved by the invention]
Therefore, when using the above-mentioned board guide rails, we have prepared board guide rails of individual shapes formed with dimensions selected for the size of the case and the mounting pitch of the printed circuit board to be attached to the case. In addition, many types of board guide rails having different numbers of printed circuit boards and different mounting pitches must be prepared, and the cost of the molding dies has increased.
[0005]
Further, when mounting the plurality of other printed circuit boards around the mother printed circuit board using the circuit board guide rails, a connector of the mother printed circuit board and a connector of the other plurality of printed circuit boards or a plurality of printed circuit boards The connector between the printed circuit boards could not be easily connected because there was no positioning structure for the housing.
[0006]
Furthermore, when the board guide rail is made of resin, it is necessary to prepare another metal part as described above in order to connect the ground pattern of the printed board to the housing and take the ground, and this metal part is printed. An attachment structure for attaching to the substrate and the housing is also required.
[0007]
In view of this point, the present invention firstly makes it possible to mount a printed circuit board on a housing without preparing multiple types of substrate guide rails every time the housing dimensions and printed circuit board mounting pitch are different. An object of the present invention is to provide a structure for mounting a substrate on a housing .
[0008]
A second object of the present invention is to provide a board mounting structure on a housing which is devised so that a connector of another printed board is positioned with respect to a mother printed board.
[0009]
Thirdly, the present invention provides a board mounting structure to a housing that is devised so that the ground pattern of a printed circuit board can be easily connected to the housing without using another metal component as in the prior art. It is an object.
[0010]
[Means for Solving the Problems]
In order to achieve the first object described above, the present invention can divide a plurality of guide rail grooves formed in a board guide rail for mounting a printed circuit board on a housing in an appropriate number of units. A kerf is formed in order to construct the above.
[0011]
As a result, a predetermined number of printed circuit board guide rails can be selected and used depending on the number and pitch of printed circuit boards to be mounted on the housing, and a predetermined printed circuit board can be mounted on the housing. Can be standardized.
[0012]
In order to achieve the second object, a board guide fitting is attached to the mother printed board, and a connector of the fixed side printed board is guided and positioned on the mother printed board.
[0013]
As a result, the connector of the fixed side printed board is guided and positioned by the board guide metal fitting, and can be easily connected to the connector of the movable side printed board.
[0014]
Furthermore, in order to achieve the third object, the present invention is the substrate-induced fitting, by contacting a ground pattern provided on the stationary printed circuit board, by a grounding structure of the fixed-side printed circuit board The ground pattern provided on the fixed side printed circuit board is configured to contact the main chassis via the circuit board guide rail.
[0015]
As a result, the ground pattern of the fixed printed circuit board can be easily connected to the ground, and there is no need to prepare a separate metal part for conventional ground connection.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention , the printed circuit board mounting structure to the casing of the present invention comprises a substantially H-shaped casing by interposing a mother chassis so as to partition both opposing surfaces of the main chassis and the upper surface chassis. In addition, a pair of board guide rails configured separately from the main chassis and the upper chassis are mounted on respective surfaces of the main chassis and the upper chassis facing each other, and the board guide rails are connected to the mother chassis. The first board guide rails and the second board guide rails arranged perpendicularly to the mother chassis so that the first board guide rails and the second board guide rails are movable. A plurality of guide rail grooves into which the ends of the side printed circuit board and the fixed side printed circuit board are fitted are formed. A kerf is formed so as to be separable with an appropriate number of grooves as a unit, and an engagement piece projects from one of both end portions facing each other, and a screw insertion hole is formed in the other. The engaging pieces are respectively engaged with a plurality of engaging holes provided in the main chassis or the upper chassis, and screws are inserted into the screw insertion holes to be provided in the main chassis and the upper chassis. The movable side printed circuit board and the fixed side printed circuit board are mounted on the main chassis and the upper surface chassis by being screwed into the screw holes, and the fixed side printed circuit board is mounted when the fixed side printed circuit board is mounted on the main chassis. And a mother printed board between the mother chassis and at least one end of the movable printed board facing the mother chassis. A pair of first connectors are mounted, and a second connector is mounted on the mother printed circuit board and the fixed printed circuit board so as to face the mother chassis, and the first connector and the second connector are connected to the mother printed circuit board. A board guide fitting that is inserted into an insertion hole formed in the chassis and then connected to each other, and further guides and guides the second connector on the fixed printed circuit board side to the mother printed circuit board. it characterized in that the provided.
[0019]
As a result, according to the present invention, an appropriate number of board guide rails are selected and used according to the number and pitch of the movable side printed board or fixed side printed board to be mounted on the casing, and a predetermined printed board is mounted on the casing. Therefore, standardization of the board guide rail is possible.
[0021]
As a result, according to the present invention, the connector on the fixed side printed circuit board is guided and positioned by the board guide metal fitting, and the connection to the connector on the movable side printed circuit board can be facilitated.
[0022]
PCB mounting structure of the housing according to the invention of claim 2, the substrate-induced metal, by contacting a ground pattern provided on the fixed-side printed board, form configured as a ground structure of the fixed printed circuit board Yes.
[0023]
As a result, according to the present invention, the ground pattern of the fixed-side printed circuit board can be easily connected to the ground, and there is no need to prepare a separate metal part for conventional ground connection .
[0025]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view illustrating a part of a main chassis constituting a board guide rail and a casing according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the board guide rail, and FIG. 4 is an exploded perspective view of the casing on which the printed circuit board is mounted in the embodiment, FIG. 4 is an exploded front view, and FIG. 5 is a front view of the casing.
[0026]
In the figure, 1 is a board guide rail, and the board guide rail is composed of a first board guide rail body 9 on the movable printed board 12 side and a second board guide rail body 10 on the fixed side printed board 11 side. Yes.
[0027]
K is a casing, and the casing K is formed in a substantially H shape with a mother chassis 7 interposed so as to partition both opposing surfaces of the main chassis 5 and the upper chassis 6. .
[0028]
The first board guide rail 9 and the second board guide rail 10 are mounted on respective surfaces of the main chassis 5 and the upper chassis 6 that face each other, and are formed separately from the main chassis 5 and the upper chassis 6. Has been.
[0029]
As shown particularly in FIG. 1, the first board guide rail 9 and the second board guide rail 10 are arranged orthogonally to the mother chassis 7 so as to be partitioned with the mother chassis 7 in between. A plurality of guide rail grooves 1-a into which end portions of the movable side printed board 12 and the fixed side printed board 11 are fitted are formed.
[0030]
In addition, the board guide rails 9 and 10 have an engaging piece 1-d projecting on one of the opposite side ends and a screw insertion hole 1-c on the other.
[0031]
The engagement piece 1-d is engaged with a plurality of engagement holes 5-a provided in the main chassis 5 and the upper chassis 6, and screws 3 are inserted into the screw insertion holes 1-c. The movable side substrate 12 and the fixed side substrate 11 are attached to the main chassis 5 and the upper surface chassis 6 by screwing into screw holes 5-b provided in the upper surface chassis 6.
[0032]
Further, the board guide rails 9 and 10 are each provided with a cut groove 1 in order to divide the board guide rails 9 and 10 in units of an appropriate number (three in FIG. 1) of guide rail grooves 1-a. -b is formed.
[0033]
As a result, a predetermined number of printed circuit boards can be mounted on the housing by selecting and using an appropriate number of circuit board guide rails 9 and 10 depending on the number and pitch of the movable printed circuit board 12 or the fixed printed circuit board 11. For this reason, standardization of the board guide rails 9 and 10 is possible.
[0034]
Also, upon mounting of the fixed printed circuit board 11 to the main chassis 5 and the upper surface chassis 6, a mother printed circuit board 8 is pinched between the fixed-side printed circuit board 11 and the mother chassis 7, the movable-side printed circuit board 12 and the mother printed The board 8 and the fixed side printed board 11 are connected by connectors 12-1 to 12-3 (first connector) and 8-a, 8-b and 11-a (second connector).
[0035]
That is, the connectors 12-1 to 12-3 are attached to the end of the movable printed circuit board 12 on the mother chassis 7 side, and the connectors 8-a and 8-b are connected to the mother chassis 7 of the mother printed circuit board 8. The through hole 8-c is attached to the surface facing the side, with the through hole 8-c spaced apart from each other in the center, and the connector 11-a is substantially the end of the fixed printed circuit board 11 facing the mother chassis 7 side. It is attached in the center.
[0036]
As shown in FIG. 2, a protrusion 4-a is formed at the bottom of the guide rail groove 1-a in the first board guide rail 9 and the second board guide rail 10, and the outer lower surface of the protrusion 4-a. A recess structure 4-b is formed on the upper surface 6 to form a spring structure that presses the fixed side printed circuit board 11 against the upper surface chassis 6 side. This spring structure may be formed on the board guide rail 10 side on the upper chassis 6 side so that the fixed side printed board 11 is pressed against the main chassis 5 side. Moreover, it is conceivable to apply a spring structure on a substrate guide rail 9 of the movable-side print substrate 12 side.
[0037]
As a result, the vertical direction of the movable-side printed board 12 or the fixed-side printed board 11 is reliably positioned on the board guide rails 9 and 10, and these printed boards can be easily positioned on the guide rail grooves 1- of the board guide rails 9 and 10. Can be easily fitted to a.
[0038]
Further, the mother chassis 7 has a plurality of insertion holes 7-a, 7-b, 7-c in units of three in a vertical row, and these insertion holes 7-a, 7-b The connectors 12-1 and 12-2 and the connectors 8-a and 8-b are connected by being inserted, and the connector 12-3 and the insertion hole 8-c of the mother printed circuit board 8 are inserted into the insertion hole 7-c. The connection is made by inserting the connector 11-a inserted through the connector 11-a.
[0039]
Reference numeral 13 denotes a board guide metal fitting, and this board guide metal fitting 13 is mounted so as to be positioned up and down across the surface of the mother printed circuit board 8 opposite to the mother chassis 7, for example, the through hole 8-b. A plurality of paired upper and lower guide grooves 13-a are formed. The guide groove 13-a is fitted to the end of the fixed side printed board 11 and positions the fixed side printed board 11 with respect to the mother printed board 8.
[0040]
As a result, the connector 11-a is guided and guided by the board guide fitting 13 and positioned on the mother printed board 8.
[0041]
11-b is a ground pattern formed on the fixed side printed circuit board 11, and this ground pattern 11-b is used when the end of the fixed side printed circuit board 11 is fitted in the guide groove 13-a. 13, the ground structure of the fixed side printed circuit board 11 is configured.
[0042]
In the above embodiment, the case where the board guide rail 10 is made of metal is considered. However, the present invention is not limited to this, and a resin thing is used, and the surface of the resin board guide rail 10 is used. It is also conceivable that the ground pattern provided on the fixed-side printed board 11 is brought into contact with the main chassis 2 to form a ground structure for the fixed-side printed board by applying metal plating to the fixed-side printed board 11.
[0043]
As a result, according to the present invention, the ground pattern of the fixed-side printed circuit board 11 can be easily connected to the ground, and there is no need to prepare a separate metal part for conventional ground connection.
[0044]
【The invention's effect】
The present invention is, in units of an appropriate number of a plurality of guide rails grooves made form the board guide rail for mounting the printed circuit board to the housing, by kerf to splittable structure is formed Depending on the number of printed circuit boards to be mounted on the casing and the pitch, an appropriate number of board guide rails can be selected and used to mount a predetermined printed circuit board on the casing. It is possible to reduce the necessary types of molding dies and contribute to cost reduction.
[0045]
Further, the present invention is configured to attach a board guiding bracket to a mother chassis constituting the casing, guide one connector of a fixed side printed board to be mounted on the casing, and position the mother chassis on the mother chassis. Therefore, the connector of the fixed side printed circuit board is guided and positioned by the board guide metal fitting, and can be easily connected to the connector of the movable side printed circuit board.
[0046]
Furthermore, the present invention is the substrate-induced fitting, by contacting a ground pattern provided on the fixed-side printed board, from Rukoto have a grounding structure of the fixed printed circuit board, easily ground the ground pattern of the fixed-side printed board It is possible to connect, and it is not necessary to prepare a separate metal part for conventional ground connection, which also contributes to cost reduction.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view depicting a part of a main chassis constituting a board guide rail and a casing according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view of the board guide rail. FIG. 4 is an exploded front view of the casing to which the printed circuit board is mounted according to the embodiment of the present invention. FIG. 5 is an exploded front view of the casing.
K casing 1 board guide rail 1-a guide rail groove 1-b groove 1-c screw insertion hole 1-d engagement piece 2
3 Screw 4-a Protrusion (spring structure)
4-b recess (spring structure)
5 Main chassis 5-a Engagement hole 5-b Screw hole 6 Upper surface chassis 7 Mother chassis 8 Mother printed circuit board 8-a, 8-b Connector 9 First circuit board guide rail 10 Second circuit board guide rail 11 Fixed side print Board 11-a Connector 12 Movable printed board 12-1 to 12-3 Connector 13 Board guide bracket 13-a Guide groove

Claims (2)

The mother chassis is interposed so as to partition both opposing sides of the main chassis and the top chassis, and a substantially H-shaped housing is configured.
A pair of board guide rails configured separately from the main chassis and the upper surface chassis are mounted on the surfaces of the main chassis and the upper surface chassis facing each other.
The board guide rail is configured by a first board guide rail and a second board guide rail arranged in a straight line on the mother chassis so as to be partitioned across the mother chassis.
Each of the first and second board guide rails is formed with a plurality of guide rail grooves into which the end portions of the movable side printed board and the fixed side printed board are fitted. A kerf is formed so as to be separable in units of numbers, and an engagement piece protrudes from one of both end portions facing each other, and a screw insertion hole is formed in the other, The engaging pieces are respectively engaged with a plurality of engaging holes provided in the main chassis or the upper chassis, and screws are inserted into the screw insertion holes, and screwed into the screw holes provided in the main chassis and the upper chassis. By combining, the movable side printed circuit board and the fixed side printed circuit board are mounted on the main chassis and the upper surface chassis,
And, upon attachment of the fixed printed circuit board to the main chassis, a mother printed circuit board and pinched between the fixed-side printed circuit board and the mother chassis,
Further, at least one pair of first connectors is attached to one end side of the movable printed board facing the mother chassis, and the second connector is placed on the mother printed board and the fixed printed board so as to face the mother chassis. And connecting the first connector and the second connector through the insertion hole formed in the mother chassis,
Further, a printed circuit board mounting structure to a housing, wherein the mother printed circuit board is provided with a substrate guide fitting for guiding and positioning the second connector on the fixed printed circuit board side to the mother printed circuit board. . The substrate induction bracket, the fixed-side printed board is brought into contact with the ground pattern provided, printed circuit board mounting structure of the claim 1, wherein the housing is characterized in that the grounding structure of the stationary printed circuit board.

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