JPH05335761A - Printed board unit insertion / removal structure - Google Patents

Abstract

(57) [Summary] [Purpose] A printed circuit board unit that has electronic circuits configured by mounting components on the printed wiring board is inserted into the guide mechanism at both edges from the front and slid, and then plugged into the connector on the backboard on the rear surface. With regard to the printed board unit insertion / extraction structure for the shelf to be installed side by side, the guide rail outer width is made smaller to increase the size of the cooling airflow vent area, and regardless of the printed wiring board board thickness of the printed board unit. An object of the present invention is to provide a printed board unit insertion / extraction structure that uses the same guide rail. [Structure] The printed wiring board 1 having a multilayer laminated structure is
A print used by making the inner-layer copper-clad laminate 12 smaller than the outer dimensions of the outer-layer copper-clad laminate 13 on the front and back sides, laminating and adhering the opposite side edges so as to form a predetermined concave groove 2, and cutting into a predetermined outer shape. It is composed of a plate unit 3 and a convex guide rail 4 which is engaged with the concave groove 2 and slides and guides it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention inserts a printed circuit board unit in which parts are mounted on a printed wiring board to form an electronic circuit into a guide mechanism with both side edges inserted from the front surface and slid, and then plugged into a connector on a back board on the rear surface. The present invention relates to a printed board unit insertion / extraction structure for a shelf that is in-connected, interconnected, and mounted in parallel.

Electronic devices use a mounting method using a printed wiring board and have improved productivity, reliability, economy and maintainability, and are now being used in all types of devices. The electronic device is
The form differs greatly between mass-produced products similar to home appliances and other types of small-quantity products.Mass-produced products are individual products in pursuit of ease of use and economic efficiency, and do not consider commonalities and have a unique form. However, in the case of various types of small-quantity products, it is important to design the devices in series with the greatest common denominator, standardize the members, mass-produce them, and obtain productivity and economic efficiency.

[0003]

2. Description of the Related Art FIG. 4 is a perspective view of a shelf of an example of a conventional electronic device. We have a series design for various types of small-volume electronic devices.
A printed circuit board unit having a circuit structure is arranged side by side on the printed wiring board, plugged in and mounted, and three-dimensionally accommodated to achieve high-density mounting.

The shelf structure of this conventional electronic device is as shown in the perspective view of FIG.
Plug in the side plates 56 on both sides, the backboard 7 on the entire rear surface, the horizontal connecting fittings 57 arranged in the front and rear and upper and lower parts, and the guide rails 49 installed between the front and rear horizontal connecting fittings 57. And a printed circuit board unit 39 for storing.

The backboard 7 is composed of a multi-layered printed wiring board, a connector 71 is arranged at a predetermined position for mounting, and the terminals thereof are connected to each other by printed wiring.
The guide rail 49 is a synthetic resin molded product that forms the concave groove 29. The guide rail 49 is erected by fixing the front and rear to the horizontal connecting metal fittings 57, and the concave groove 29 is attached so as to face each other at the upper and lower parts.
And the guide for plug-in connection to the connector 71 of the backboard 7. Therefore, the guide rail 49
Are vertically opposed to each other at each mounting position of the printed board unit 39, and this mounting is standardized at a pitch of 12.7 mm, and the vertical interval is (constant value) + (25.4 × N) mm [N is an integer]. There is.

The printed board unit 39 has a circuit structure in which a circuit component 14 is mounted on a rectangular printed wiring board 19, and a connector 15 having a pattern formed so as to project from its rear edge is integrally provided.

If both side edges of the printed board unit 39 are inserted into the pair of upper and lower guide rails 49 of the shelf 59 and slid and pushed in, the connector 15 at the rear edge is moved to the backboard 7.
The connector 71 is fitted to make a circuit connection, and is fixed at the same time.

As described above, the guide rail 49 has a concave groove 29 so as to slidably sandwich the side edge of the printed wiring board 19 so that the printed board unit 39 can be inserted into and removed from the shelf 59.
The groove width of the concave groove 29 is of course the printed wiring board.
Larger than 19 plate thickness.

In addition to the shape of the illustrated guide rail 49,
Although not shown, the sheet metal is processed by parling and the horizontal connection fitting 57
There is also a method of providing a rail groove having a concave groove 29 shape on the upper plate and the lower plate which are integrated, but in any case, the rail groove width is larger than the plate thickness of the printed wiring board 19.

[0010]

However, the outer width of the guide rail 49 including the wall thicknesses of both walls of the concave groove 29 is predetermined because it needs to have a predetermined strength for guiding and sliding the printed board unit 39. Is greater than or equal to. On the other hand, the circuit components 14 mounted on the printed board unit 39
The cooling air flow rises through the space between the arranged guide rails 49, but if the outer width dimension of the guide rails 49 is large, it is not possible to secure a sufficient vent hole area for the cooling air flow. With the recent trend toward high density and compact mounting, the circuit components 14 mounted on the printed board unit 39 will become smaller and smaller, and the mounting pitch of the guide rails 49 arranged in parallel will become even smaller.
The vent area of the cooling air flow is further reduced. On the other hand, high-density mounting requires enhanced cooling capacity, and it is necessary to increase the area of the ventilation holes for the cooling air flow.
If we prioritize downsizing of the device, the flow of cooling air will deteriorate,
Reliability cannot be improved because sufficient cooling cannot be performed.

If the cooling is prioritized, the size of the cooling air flow cannot be reduced in order to secure a large area for the ventilation port. Furthermore, due to the small-sized high-density mounting orientation, there are many wirings and connections in the printed circuit board unit 39, and the multilayered phenomenon of the printed wiring board 19 appears prominently, making it difficult to maintain the same thickness of the printed wiring board 19. Things can happen. In this situation, the number of types of groove width of the concave groove 29 of the guide rail 49 is increased, and the manufacture of the shelf 59 is complicated. There are problems such as.

In view of such a problem, the present invention reduces the outer width of the guide rail to increase the opening area of the cooling air flow and the same guide regardless of the printed wiring board thickness of the printed board unit. An object is to provide a printed board unit insertion / extraction structure using rails.

[0013]

The above-described object is to achieve the above-mentioned objects with reference to FIGS.
As shown in [1], insert the components on the printed wiring board and configure the electronic circuit into the printed wiring board unit, insert both edges from the front into the guide mechanism, slide it, and plug it into the backboard connector on the rear. , A printed circuit board unit insertion / extraction structure in a shelf for interconnecting and mounting in parallel,
In the printed wiring board 1 having a multilayer laminated structure, the inner-layer copper-clad laminate 12 is made smaller than the outer dimensions of the outer-layer copper-clad laminate 13 on the front and back sides and laminated and bonded so that the opposite side edges form the predetermined concave groove 2. Then, the printed board unit 3 cut into a predetermined outer shape and used, and the convex guide rail 4 which engages with the concave groove 2 and slides the printed board unit 3 to guide the storage and the plug-in connection, This is achieved by the printed board unit inserting / pulling-out structure of the present invention, which is composed of the shelves 5 which are vertically opposed to each other and are arranged in parallel, and which are arranged at mounting intervals so as to be accommodated in parallel. [2] Here, the printed board unit 3 using the printed wiring board 1 provided with a plurality of penetrating members 6 that penetrates and is fixed in the vicinity along the concave groove 2 is provided. It can be achieved by the board unit insertion / extraction structure. [3] Further, the penetrating member 6 is a penetrating member 66 using a conductive member, and the printed wiring board unit 33 is formed by using the printed wiring board 11 partially or wholly exposed in the concave groove 2, The printed board unit inserting / pulling-out structure of the present invention, which is composed of the shelf 55 which is the guide rail 44 in which the guide rail 4 is electrically grounded, is also applicable.

[0014]

That is, the convex guide rails 4 provided on the shelves 5,55 are connected to the printed wiring boards 1,11 of the printed board units 3,33.
Since the concave groove 2 on the side edge of is engaged and slid,
Even if the thickness of the printed wiring boards 1 and 11 increases due to the number of laminated layers,
If the groove width of the concave groove 2 is not changed, the same guide rails 4 and 44 can be used regardless of the plate thickness.

Further, since the convex guide rails 4 and 44 do not have both walls as compared with those having the concave groove 29 as in the above-mentioned conventional example, the outer width dimension can be made smaller, so the guide rails can be made smaller. The ventilation port area of the cooling air flow between 4, 44 can be expanded by that amount.

As shown in FIG. 2, the printed wiring board 1 is formed by laminating the inner layer copper-clad laminate 12 and the outer layer copper-clad laminate 13 each having a circuit pattern etched and having predetermined width differences. Bonding is performed to form predetermined concave grooves 2 on both side edges. After that, this is cut and formed into the outer shape of the printed wiring board 1.

When the number of inner-layer copper-clad laminates 12 increases and the plate thickness increases, the number of inner-layer copper-clad laminates 12 in the central portion is made the same, and the other inner-layer copper-clad laminates 12 are outer layers. By laminating and adhering the copper clad laminate 13 in the same outer shape, the groove width dimensions of the concave grooves 2 are made uniform. When the increase in plate thickness is slight, the groove width of the concave groove 2 is slightly increased and rattling occurs even if all the inner-layer copper-clad laminates 12 are laminated and adhered with the same width dimension. The fitting connection between the connector 15 and the connector 71 is not hindered.

Further, the penetrating member 6 is provided in the vicinity along the concave groove 2.
It is possible to eliminate the risk that the side edge of the printed wiring board 1 is peeled off from the concave groove 2 by repeating the insertion and extraction by penetrating through and fixing.

Further, as shown in FIG. 3, a conductive member, for example, a penetrating member 66 made of a copper material is provided in the concave groove 2 so as to be partially or entirely exposed to prevent the printed wiring board 11 from peeling off. At the same time, the guide rail 44 of the shelf 55 is slidably mounted on the frame such as the horizontal connecting metal fitting 57 or the like by conductively grounding the guide rail 44 of the shelf 55 with a metal material or a metal plating.
11 is connected to the shelf 55 through the penetrating member 66 for a short ground connection, so that it can be applied to high-level shielding and high-speed, high-frequency circuits.

Thus, according to the present invention, the same guide rail is used regardless of the size of the vent hole for the cooling air flow and the printed wiring board thickness of the printed board unit by making the outer width of the guide rail smaller. It is possible to provide a printed board unit insertion / extraction structure.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in the drawings. Throughout the drawings, the same reference numerals denote the same objects. FIG. 1 shows an embodiment of the present invention, (a) is a perspective view of a shelf structure, (b) is a partially enlarged view of a printed board unit and a guide rail, and FIG. 2 is a printed wiring board of the embodiment of the present invention. , (A) is the base copper clad laminate, (b) is a laminated plan view,
(c) is a laminated side view, (d) is a cut side view, and FIG. 3 is a partially enlarged view of another embodiment of the present invention.

Each of the present embodiments is a trial application to the electronic device of the above-mentioned conventional example. One embodiment is as shown in FIG. 1 (a), where the shelf 5 has side plates 56 on both sides,
Backboard 7 consisting of four horizontal connecting fittings 57 connected at the upper and lower corners and a multilayer printed wiring board covering the entire rear surface
And a guide rail 4 which is fixed to the horizontal connecting metal fitting 57 at a mounting position of the printed board unit 3 so as to be vertically opposed to each other, and a printed board unit 3 for plug-in mounting.

The backboard 7 is provided with a connector 71 for connecting to a mounting corresponding position of the printed board unit 3, and terminals of each connector 71 are interconnected by a printed wiring according to a circuit.

The horizontal connecting fitting 57 is a rod body having a U-shaped cross section.
Mounting holes for the guide rails 4 are formed at 2.7 mm pitch. The guide rail 4 has a T
It is a nylon rod with a V-shaped cross section, the central convex rail has a thickness of 0.8 x height 2 mm, the overall width is 2.5 x height 5.25 mm, and the beer barrel-shaped fixed protrusions 41 are vertically split at the front and rear predetermined positions. Is provided, and the fixing projection 41 is press-fitted into the mounting hole of the lateral connecting fitting 57 to be fixed.

Printed wiring board 1 of printed board unit 3
Is a 1.6 mm-thick multilayer printed wiring board having 5 or 6 conductor layers of glass epoxy resin base material.
As shown in (a), six inner-layer copper-clad laminates 12 having the same outer shape and having a circuit pattern formed by etching, and two outer-layer copper-clad laminates 13 similarly patterned and having a substantially regular size are formed. As shown in (b) and (c) of FIG. 2, three inner layer copper-clad laminates 12 are laminated in the same manner, the inner layers are arranged in two rows, and the outer-layer copper-clad laminates 13 are located on both sides. After stacking and laminating and adhering together, 6 lines are cut by cutting line 16
As shown in FIG. 2D, this side surface is formed with a concave groove 2 having a width of 1 mm and a depth of 2 mm at the center of both sides.

Therefore, the concave groove 2 is formed at the same time by laminating and adhering it without cutting. This time, the printed wiring board 1 is made up of 6 pieces, but of course,
It may be possible to take a plurality of pieces such as three pieces for one row, or to take one piece.

When the number of laminated layers is small, a dummy laminated plate without copper clad may be laminated instead of the inner layer copper clad laminated plate 12 and laminated so that the groove size of the concave groove 2 is not changed. Further, when the number of laminated layers increases to 7 or more, the inner layer copper-clad laminated board 12 is laminated, and the inner copper clad laminated board 12 is thin so that the thickness becomes 1 mm, or 3 inner copper clad laminates 12, the other inner layer copper clad laminates 12 have the same outer shape as the outer copper clad laminate 13, and the finished groove thickness is the same as that of the concave groove 2. Should be increased to the central allocation.

As shown in FIG. 1 (b), the printed wiring board 1 has a stainless steel pin-shaped penetrating member 6 which penetrates along the concave groove 2 and in the vicinity of the concave groove 2 at an interval of 25 mm. Are fixed by soldering, and there is no risk that the printed wiring board 1 will be peeled off at the concave groove 2 portion when the printed wiring board 1 is inserted or removed.

This printed wiring board 1 is formed with a connector 15 having an etching pattern formed so as to project to the rear edge in the same manner as the above-mentioned conventional example, and the printed board unit 3 is inserted into the shelf 5 from the entire surface, and concave portions on both side edges are formed. When the shaped groove 2 is slid into the guide rail 4, the connector 15 fits into the connector 71 of the backboard 7 and is fixedly connected.

In the other embodiment, if only different parts are described, as shown in FIG. 3, the printed wiring board 11 has a penetrating member 66 penetrating along the vicinity of the concave groove 2 and having conductivity. It is made of copper and has a pin shape, which is penetrated and fixed so as to partially expose the groove bottom of the concave groove 2. This through hole serves as a through hole for conducting the shield ground circuit of each conductor layer. There is.

Further, the guide rail 44 of the shelf 55 is also molded from an aluminum alloy material which is a conductive material, and the fixing projections 42 protruding forward and backward are press-fitted into the mounting holes of the lateral connecting fittings 57 to be fixed, and Since the frame 55 of the shelf 55 is electrically connected to the frame ground and the concave groove 2 is engaged with the frame 55 to slide the printed board unit 33 in, the penetrating member 66 exposed in the groove 66.
Are brought into contact with each other to be conductively grounded, and the shield ground circuit of the printed wiring board 11 is shortly grounded.

The above-mentioned respective embodiments are merely examples.
The shape, size, and material of each part are not limited to the above. For fixing the guide rails 4 and 44, the fixing projections 41 and 42 are press-fitted into the mounting holes 58 of the horizontal connecting fitting 57, but they may be fitted with other engaging shapes or screwed.

[0033]

As described above, with the printed board unit insertion / extraction structure of the present invention, the guide rails 4 and 44 are changed from the concave shape to the convex shape, and the width dimension can be made smaller. We were able to increase the air flow vent area by about 20%. The same product can be used without increasing the width of the guide rails 4 and 44 even if the thickness of the printed wiring boards 1 and 11 is increased in order to cope with the recent remarkable multilayering phenomenon of the printed wiring boards 1 and 11. Since the frame ground for security or shielding can be introduced into the printed board units 3 and 33 without running along with other signal circuits, the signal circuits are not affected. Etc. are obtained, and the effect is great.

[Brief description of drawings]

FIG. 1 is an embodiment of the present invention (a) a perspective view of a shelf configuration (b) a partially enlarged view of a printed board unit and a guide rail

FIG. 2 is a printed wiring board according to an embodiment of the present invention.

FIG. 3 is a partially enlarged view of another embodiment of the present invention.

FIG. 4 is a perspective view of a shelf of an example of a conventional electronic device.

[Explanation of symbols]

1,11,19 Printed wiring board 2,29 Recessed groove 3,33,39 Printed circuit board unit 4,44,49 Guide rail 5,55,59 Shelf 6,66 Penetration member 7 Backboard 12 Inner copper clad laminate 13 Outer layer Copper clad laminate 14 Circuit parts 15,71 Connector 16 Cutting wire 41,42 Fixing protrusion 56 Side plate 57 Horizontal connecting metal fitting

Claims (3)

[Claims] 1. A printed circuit board unit, in which components are mounted on a printed wiring board to form an electronic circuit, is slid by inserting both side edges from a front surface into a guide mechanism and plugging in a connector on a back board on the rear surface, and then connecting them to each other. A printed wiring board unit insertion / extraction structure for a shelf that is connected and installed side by side, in which a printed wiring board (1) having a multilayer laminated structure has an inner copper clad laminate (12) and an outer copper clad laminate (13) on the front and back. Of the printed board unit (3), which is smaller than the outer dimensions of the printed board unit, is laminated and adhered so that the opposite side edges form a predetermined concave groove (2), and is cut into a predetermined external shape, and the concave groove (2 ), Slide the printed circuit board unit (3), and install the convex guide rails (4) that guide the storage and plug-in connection in parallel vertically facing each other, and further accommodate them in parallel. Shelf installed at mounting intervals
(5) A printed circuit board unit insertion / removal structure characterized by comprising 2. A printed board unit using a printed wiring board (1) provided with a plurality of penetrating members (6), which are pierced and fixed in the vicinity along the concave groove (2), at intervals. The printed board unit insertion / removal structure according to claim 1, wherein 3. The printed wiring board (11), wherein the penetrating member (6) according to claim 1 is a penetrating member (66) using a conductive member, and a part or all of which is exposed in the concave groove (2). ), And a shelf (55) which is a guide rail (44) with the guide rail (4) according to claim 1 grounded and conducted. Board unit insertion / extraction structure.