JPH0661664A - Fixing/positioning method for wiring board in shelf rear side - Google Patents

Abstract

PURPOSE:To provide a fixing/positioning method for wiring boards in shelf rear side in which the work is facilitated enhancing the accuracy without requiring a fitting PKG. CONSTITUTION:A shelf body 2 is provided with guide grooves 22, to be inserted with the opposite side edges of a printed board package 1 (hereinafter, referred to PKG1), in parallel while opposing vertically. A connector 33, to be connected with a connector 11 arranged at the rear edge of the inserted PKG1 and closing the opening entirely, is arranged at each corresponding position thus fixing a rear wiring board 3 comprising interconnected printed wiring boards accurately. Fitting part 43 for the connector 33 at four corners of the rear wiring board 3 is paired with a protrusion 42 fitted in a closest guide groove 22 for guiding the PKG1 connected with the connector 33 while keeping accurate relative positional relationship thus forming an integral adapter 4. The adapter 4 is fitted to each connector 33 and further fitted to the guide groove 22 thus positioning the rear wiring board 3 accurately with respect to the shelf body 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of fixing and positioning a rear wiring board of a shelf. The mounting method that uses a printed wiring board is extremely convenient for electronic devices that use semiconductor components. With the miniaturization of components and the increase in high-density integrated circuits, downsizing or high-density mounting of printed wiring boards is possible. Is becoming more and more promoted.

A printed circuit board package (hereinafter referred to as PKG; in which components are mounted on a series of printed circuit boards to form a circuit).
(Printed Circuit Package) is plugged into a shelf that is stacked and mounted on the equipment casing, and the mounting space of the equipment casing is three-dimensionally mounted.

In this plug-in connection, a shelf is provided with a guide groove, a rim of a printed wiring board is slid and inserted into the guide groove, and the connector is connected to a connector provided on a rear wiring board. Accordingly, the terminals of the connector have become minute, and the terminals are arranged at a high density, and high accuracy is required in terms of structural dimensions.

[0004]

2. Description of the Related Art FIG. 4 shows a conventional shelf.
(a) is a block diagram, (b) is a side sectional view, and (c) is a front view.

As a conventional example of an electronic device, as shown in FIG. 4, a shelf 99 has a rectangular tube-shaped shelf main body 29 formed by upper and lower plates and both side plates, and a rear surface formed of a printed wiring board over the entire rear opening. It is a box body closed by a wiring board 39, and upper and lower plates are provided with guide grooves 22 facing each other vertically and in parallel with each other at a predetermined interval in the left-right direction. Insert into the groove 22 and install in parallel, PKG
The connector 11 provided at the rear edge of the connector 1 is plugged into the connector 33 having a press-fit pin configuration provided on the rear wiring board 39 for mounting, and such a shelf 99 is placed on an apparatus casing (not shown). It is mounted to achieve high-density mounting.

The rear wiring board 39 includes a strip-shaped insulating plate 26, a rear wiring board 39, an insulating plate 26, an insulating plate 26, which is bent on the fixed fixing surfaces 28 at the rear edges of the upper and lower plates of the shelf body 29, and a reinforcing member 27 installed at the rear center. Plate 26,
The metal fittings 25 having a small rectangular length are stacked in this order, and are integrally fastened and fixed with a fixing screw.

With the miniaturization of parts, the connector 33 is downsized, and the mounting density of the PKG1 tends to increase. The accuracy of the fixed position of the shelf body 29 and the rear wiring board 39 is the same as that of the connector 11 of the PKG1 and the rear wiring board 39. Increasingly high precision is required in order to fit the connector 33 smoothly.

Therefore, in order to satisfy the relative position between the PKG 1 and the rear wiring board 39 with reference to the guide groove 22 of the shelf body 29, the shelf assembly work is performed by the following method.

As shown in FIG. 4 (c), a PK is provided so as to be fitted and connected to the connectors 33 provided at both ends of the rear wiring board 39.
G1 or the pseudo PKG for fitting is inserted into the guide groove 22 at a predetermined position of the shelf main body 29 to be plug-in mounted, and the rear wiring board 39 is fastened and fixed to the fixed surface 28 at that position.

[0010]

However, as shown in FIGS. 4 (b) and 4 (c), the rear wiring board 39 is provided with the connectors 33 in upper and lower two stages, and the connectors 33 are also arranged depending on the number of terminals. Multiple types are used, and various upper and lower combinations are used to prevent incorrect mounting of PKG1.
33 are arranged. Therefore, there are many types of the above-mentioned pseudo PKG for fitting (3 × 3 = 9 types if the connector 33 is 3 types, and 4 types if 4 types are used).
× 4 = 16 types) are required for a minimum of two. Moreover, it is easy to make a mistake
May have damaged the 33. Since the rear wiring board 39 is fixed by the stacking structure shown in FIG. 4 (a), the PKG1 is inserted for fitting and then the shelf main body 29 is turned over. Depth must be secured, workability is poor, and man-hours are required. There were problems such as.

In view of the above problems, it is an object of the present invention to provide a fixing and positioning method which does not use a PKG for fitting and which provides high accuracy and is easy to work.

[0012]

The above-described object is to achieve the above-mentioned objects with reference to FIGS.
As shown in [1] Guide groove 22 for inserting and sliding both side edges of PKG1
After the opening, the entire surface of the shelf body 2 was closed and inserted into a rectangular tube-shaped shelf main body 2 that is parallel to the upper and lower surfaces and is arranged in parallel at a predetermined interval.
In order to accurately fix the rear wiring board 3, which is a printed wiring board in which the connectors 33 to be fitted and connected to the connector 11 provided on the rear edge of the KG1 are arranged at their corresponding positions, and which are wired mutually according to the circuit. The positioning method is a positioning protrusion that fits into the fitting groove 43 for the connector 33 provided at the four corners of the rear wiring board 3 and the PKG 1 that fits and connects with the connector 33 and that fits in the most recent guide groove 22. The adapter 4 integrally formed by pairing the parts 42 with each other in a correct relative positional relationship is fitted into the respective connectors 33 at the four corners and fitted into the guide grooves 22, so that the rear wiring board 3 is mounted on the shelf body. This is achieved by the fixed positioning method of the rear wiring board of the shelf of the first invention, which accurately positions the wiring board in the second position. [2] A positioning method for accurately fixing the rear wiring board 3 to the shelf body 2 in the same manner, in which the rear edge of the shelf body 2 and the peripheral edge of the rear wiring board 3 in contact with the rear edge are It is also suitable for the method for fixing and positioning the rear wiring board of the shelf of the second aspect of the present invention, in which a plurality of notches 5 that engage with each other without a gap are provided at opposite edges, and the notches 5 are engaged with each other to secure the fixing position accuracy. . [3] Further, in the same method for fixing and positioning the rear wiring board of the shelf, the concave and convex portions 6 and 66 which are fitted to each other are separated from the fixing surfaces 21 and 31 for fixing the shelf body 2 and the rear wiring board 3. It is also achieved by the method for fixing and positioning the rear wiring board of the shelf according to the third aspect of the present invention, which is provided at a plurality of positions and the fixing portions 6 and 66 are fitted to each other to secure the fixing position accuracy.

[0013]

In other words, in the first invention, only the part relating to the connector connection of the PKG 1 is replaced with the adapter 5,
Since the adapter can be finished with a higher dimensional accuracy than the one using the actual parts, the fitting part 43 of the adapter 4
Are fitted to the respective connectors 33 at the four corners of the rear wiring board 3, the projections 42 of the respective adapters 4 project, so that the projections 42 are entirely guided by the guide grooves at predetermined positions of the shelf body 2.
By positioning the rear wiring board 3 so that it fits in the groove 22, it is possible to perform accurate fixed positioning.

As a result, the type of the adapter 4 is the fitting P
It can be greatly reduced compared to the types of KG. (If there are 3 types of connectors, a total of 3 x 2 = 6 types for up and down, 4 x 4 = 8 types for 4 types, and a minimum of 2 each should be prepared.) The fitting of the mating portion 43 is an easy operation without any mistake when the rear wiring board 3 is in an open state, and there is no fear of damaging the connector 33.

The second invention and the third invention are direct connectors.
The positional relationship between the shelf body 2 and the rear wiring board 3 is determined not by the method of associating the positions of the 33 and the guide groove 22, and the connector 33 and the guide groove 22 respectively arranged thereby are arranged with a predetermined high accuracy. Is the way to be done.

In the second aspect of the present invention, the rear edge of the shelf body 2 and the notch 5 provided in the peripheral edge of the rear wiring board 3 are engaged with each other without rattling, so that the mutual positional relationship can be arranged with high accuracy. The cuts 5 must be provided at least at four corners of the rectangular rear wiring board 3.

In the third aspect of the invention, since the convex portion 6 provided at a predetermined position on the fixed surface 21 of the shelf main body 2 is fitted into the concave portion 66 provided on the fixed surface 31 of the rear wiring board 3 without backlash, the convex portion 6 is positioned. The more accurate the irregularities 6 and 66 are arranged, the higher the mutual positional relationship between the shelf body 2 and the rear wiring board 3 can be arranged. The uneven portions 6 and 66 need to be provided at least at the four corners of the rear wiring board 3, and the unevenness may be provided in reverse.

As a result, in the second invention and the third invention,
Not only the fitting PKG but also the adapter is not required, and the workability and the dimensional accuracy can be sufficiently satisfied only by engaging or fitting.

Thus, according to the method of the present invention, it is possible to provide a fixing and positioning method which does not use a PKG for fitting and which provides high accuracy and is easy to work.

[0020]

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 first invention, (a) is a configuration diagram,
(b) is a front view of fixed positioning, FIG. 2 is a perspective view of fixed positioning of one embodiment of the second invention, and FIG. 3 is a perspective view of fixed positioning of one embodiment of the third invention.

In each of the embodiments, the height 35 × width of the above-mentioned conventional example is used.
It is a prototype that was applied to a 50 x 35 cm deep shelf. An embodiment of the first invention is as shown in FIG.
Is a PKG that is plugged into the shelf 9 with the connector 11 on the rear edge, and 2 is a shelf body that forms the body of the shelf 9,
3 is a rear wiring board made of a printed wiring board that closes the rear surface of the opening of the shelf body 2. 4 is a fitting portion 43 that fits into the connector 33.
This is an adapter in which a protrusion 42 that fits in the guide groove 22 is integrally formed.

The PKG 1 is a circuit in which components are mounted on a printed wiring board and connected by wiring, and a connector 11 for connecting the circuit to the outside is provided at two positions above and below the trailing edge.

The shelf body 2 has a PKG on the upper and lower opposite surfaces.
A guide groove 22 for inserting and sliding 1 is provided, and two guide grooves 22 at each of the right end and the left end are made to penetrate through the rear surface.

The rear wiring board 3 is provided with a connector 33 of press-fit pin configuration, which is fitted and connected to the connector 11 of the inserted PKG 1 at a corresponding predetermined position. Adapter 4
The fitting portion 43 of the through hole 44 that fits with the press-fit pin 34 of the connection terminal that constitutes the connector 33, and the hollow convex housing 45 that fits into the concave housing 35 that guides the fitting with high precision. The through-hole 44 is provided on the bottom surface of the convex housing 45, and both side edges are partially folded back so that the side wall of the concave housing 35 is elastically clamped at the time of fitting.
In addition, the knob portion 47 is provided so as to release the clamp, and the adapter 4 can be taken out by pulling out the two knob portions 47 arranged opposite to each other while grasping them with two fingers.

Thus, as shown in FIG. 1 (b), the fitting portions 43 of the respective adapters 4 are fitted to the connectors 33 at the four corners of the rear wiring board 3 and fixed by the fixing pieces 46. . Next, the protruding portion 42 of each protruding adapter 4 is inserted from the rear into the guide groove 22 penetrating through the rear surface of the shelf main body 2 at a predetermined position, positioned on the fixed surface 21, and fixed by fixing screws.

Finally, from the front, the knob of each adapter 4
Pick 47 and take it out. 4 types of connector 33
There are different types, so there are 4 types of adapters 4 = 2 = 8 types, 2 types
I am preparing for individual items.

An embodiment of the second invention is as shown in FIG. 2, in which there are tongue pieces 24 that travel backwards at the left and right ends of the rear edge of the shelf body 2, and the tongue pieces 24 are located at predetermined positions at the base of the tongue pieces. Two rectangular cuts 5 are provided at intervals of the width dimension, and there is also a tongue piece 36 that has traveled to the corresponding portion of the rear wiring board 3, and two cuts 5 are formed on both sides with the cut 5 sandwiched therebetween. The convex part of is arranged.

When assembling the rear wiring board 3 to the shelf main body 2, the notches 5 of all the tongue pieces 24 and 36 are engaged with each other at right angles to the roots, positioned, and tightened with a fixing screw. Fix it in place.

An embodiment of the third aspect of the invention is as shown in FIG. 3, in which the left and right ends of the fixed surface 21 at the rear edge of the shelf body 2 are truncated cone-shaped projections that travel backward by burring. A portion 6 is provided, and a circular hole-shaped recess 66 is formed in a corresponding portion of the fixed surface 31 of the rear wiring board 3.

After fitting the convex portions 6 and the concave portions 66 at all positions to each other, the rear wiring board 3 is fastened and fixed. Each of the above-described embodiments is an example, and the shape of each part is not limited to the above.

The bottom surface of the fitting portion 43 of the adapter 4 and the through hole 44
Corresponded to all the press-fit pins 34 of the connector 33, but it is also possible to make the bottom center part empty so as to fit only the press-fit pins 34 at the peripheral corners that contribute to the fitting position. If the fitting accuracy is acceptable, the frame-shaped fitting part without the bottom surface can be used.

The connector 33 is not limited to the press-fit pin structure, but in the case of another type of connector, an adapter fitting structure that fits with high precision and is easily and detachably fixed may be used.

Further, the uneven portions 6 and 66 are not limited to the burring process, and may be pins and fitting holes, or convex portions of other shapes and concave shapes that fit with them. Instead, it is essential that the position provided is accurate and fits securely.

[0034]

As described above, according to the method for fixing and positioning the rear wiring board of the shelf of the present invention, a fixing and positioning method that achieves high accuracy and easy work without using a PKG for fitting can be obtained. The work time per shelf can be reduced by 5 minutes, the connector can be prevented from being damaged, the productivity can be improved, and the device can be miniaturized.

[Brief description of drawings]

FIG. 1 is an embodiment of the first invention (a) configuration diagram (b) fixed positioning front view

FIG. 2 is a perspective view showing a fixed positioning of an embodiment of the second invention.

FIG. 3 is a perspective view showing a fixed positioning of an embodiment of the third invention.

FIG. 4 is a conventional example shelf (a) configuration diagram (b) side sectional view (c) front view

[Explanation of symbols]

1 Printed circuit board package 2,29 Shelf body 3,
39 Rear wiring board 4 Adapter 5 Notch 6,
66 Concavo-convex section 9,99 Shelf 11,33 Connector 2
1,28,31 Fixed surface 22 Guide groove 24,36 Tongue 25
Fixing bracket 26 Insulation plate 27 Reinforcement member 33
Press-fit pin 35 Recessed housing 42 Protrusion 43
Mating part 44 Through hole 45 Convex housing 46
Fixed piece 47 Picking part

Claims (3)

[Claims] 1. A rectangular column-shaped shelf body (2) having a plurality of guide grooves (22) for inserting and sliding both side edges of a printed board package (1), which are parallel to each other at a predetermined interval so as to face each other.
After the opening, the entire surface is closed and the printed circuit board package is inserted.
(1) A rear wiring board (3) consisting of a printed wiring board in which a connector (33) to be fitted and connected to a connector (11) provided at the rear edge of the wiring board is arranged at each corresponding position and wired in accordance with the circuit. Is a positioning method for accurately fixing the connector to the connector (33) provided at the four corners of the rear wiring board (3) and a print for fitting and connecting the connector (33). Board package
The adapter (4) that is formed integrally by pairing the projection (42) that fits in the guide groove (22), which is one of the upper and lower guides, that guides (1) and the relative positional relationship is accurately arranged. Fit into each connector (33) at each corner and guide groove (22)
A method for fixing and positioning the rear wiring board of the shelf, characterized in that the rear wiring board (3) is accurately positioned on the shelf main body (2) by fitting into the rack. 2. A rectangular tubular shelf body (2) provided with a plurality of guide grooves (22) for inserting and sliding both side edges of a printed board package (1) so as to oppose the upper and lower surfaces in parallel at predetermined intervals.
After the opening, the entire surface is closed and the printed circuit board package is inserted.
(1) A rear wiring board (3) consisting of a printed wiring board in which a connector (33) to be fitted and connected to a connector (11) provided at the rear edge of the wiring board is arranged at each corresponding position and wired in accordance with the circuit. Is a positioning method for accurately fixing the rear side of the shelf body (2) and the rear wiring board in contact with the rear edge.
A shelf characterized in that a plurality of notches (5) that engage with each other without a gap are provided in the peripheral edge of (3) at a plurality of positions at opposite edges, and that the notches (5) are engaged with each other to ensure a fixed position accuracy. Fixed positioning method for rear wiring board. 3. A rectangular tubular shelf body (2) provided with a plurality of guide grooves (22) for inserting and sliding both side edges of a printed board package (1) in parallel with each other at predetermined intervals so as to face each other.
After the opening, the entire surface is closed and the printed circuit board package is inserted.
(1) A rear wiring board (3) consisting of a printed wiring board in which a connector (33) to be fitted and connected to a connector (11) provided at the rear edge of the wiring board is arranged at each corresponding position and wired in accordance with the circuit. Is a positioning method for accurately fixing the wiring board to the shelf body (2) and the rear wiring board (3).
(21) (31) is provided with concave and convex portions (6) and (66) which are fitted to each other at a plurality of distant places, and the fixed positional accuracy is secured by fitting the concave and convex portions (6) and (66) to each other. A method for fixing and positioning a rear wiring board of a shelf, which is characterized in that: