RU19634U1 - RADIO ELECTRONIC UNIT - Google Patents

Description

The electronic unit.

The utility model relates to electronics and can be used in the design of load-bearing structures for the orientation of retractable modules, blocks of electronic equipment.

A device for mounting electronic blocks 1, containing mounted on the walls of the housing profile guides with protrusions placed one against the other on the inner sides of their shelves, which is equipped with movable elastic elements. Each profile guide is made of a V-shaped section, and the protrusions of each profile guide are located across its shelves, and each movable elastic element is installed between the wall of the housing and the base of one of the profile guides

The disadvantage of this device is the complexity of manufacturing and assembly, insufficient structural rigidity to ensure reliable contact of the connector during impact.

A device 2 is known which is made in the form of a rack of electronic equipment containing a frame in which electronic blocks are installed, and orientation units of electronic blocks relative to the frame of the rack, each of which is made in the form of a bracket, pins, guide bushings and fixing screws. The device is equipped with terminal clamps and cylindrical bushings with holes in the shape of an oval.

IPC 7 N 05 K 5/00, 7/10, 7/12, 7/14

shelf. Terminal brackets are mounted on the vertical shelf of the corresponding bracket and mounted on it with the possibility of movement relative to the grooves of the bracket located in the terminal brackets of the catcher pins, and the cylindrical bushings are mounted in the cylindrical holes of the horizontal shelf of the same bracket with the possibility of rotation, while the fixing screws are placed in the holes cylindrical bushings.

The disadvantages of this device are the significant range of parts, the complexity of assembly and manufacturing, the lack of interchangeability of the blocks due to the individual adjustment of the trap pins and bushings.

The described disadvantages can be eliminated by installing one of the subunit bushings with the possibility of changing the center distance. Of these devices, the closest in technical essence and the achieved results to the claimed solution is device 3 in the form of a radio electronic unit containing a housing with clamps fixed to it with conical ends and a subunit with two cylindrical bushings, the diameter of the holes of which is equal to the diameter of the clamps, the center-to-center distance between which equal to the intercenter distance between the holes of the cylindrical bushings. The end face of one of the cylindrical bushings is made in the form of an ellipse formed by a plane passing at an acute angle to the geometric axis of this cylindrical sleeve. The geometric center of the hole of this sleeve is offset relative to the geometric axis of its outer cylindrical surface by an amount equal to the tolerance on the center-to-center distance between the clamps. A sleeve with an end face in the form of an ellipse is mounted with the possibility of rotation about the geometric axis of its outer cylindrical surface.

-the complexity of manufacturing and assembly;

- when exposed to dynamic loads, the contact of the clamp with the surface of the sleeve is not reliable, since the tolerance on the center distance is a variable value, and the eccentricity of the sleeve is a constant value.

The technical result, which is achieved by the claimed utility model, is to reduce the complexity of manufacturing, assembly, as well as to improve the accuracy of installation of the subunit, ensuring reliable grounding contact.

To achieve the specified technical result, the claimed electronic unit contains a housing and a subunit with interaction elements, namely: latches installed on the subunit, and bushings in the housing. The diameter of the clamps and holes of the bushings, as well as their center-to-center distances, are equal. One of the clamps is made elastic with a groove, and the other with faces forming mirror-located segments of arcs. A retainer with a groove is longer than a retainer with edges.

The essence of the utility model is illustrated by drawings, where:

FIG. 1 - General view of the device;

Figure 2 - section of the retainer with the edges along K - K (Fig. 1)

Fig.Z is a section of a retainer with faces, an embodiment of the faces parallel;

Figure 4 - pair of retainers with bushings;

Figure 5 - elastic retainer with a groove, view B (Fig. 1);

The electronic unit contains a housing 1 (Fig. 1), in which bushings 2,3 are fixed with holes 4.5 with a conical surface 6 from the end facing the subunit 7. Buses 2,3 can be made integrally with the housing 1.

On the subunit 7, clamps 8.9 are installed with conical ends 10. The diameter of the cylindrical surface 11 of the clamps 8.9 is equal to the diameter of the holes 4.5 of bushings 2.3 (Fig. 1).

Center distance L between geometric axes

latches 8.9 is equal to the center-to-center distance / between the geometrical axes of the holes 4.5 of the bushings 2.3, while the tolerances for the deviation of these center-to-center distances are also taken equal to each other.

One of the latches 8 (Fig. 2) is made with faces 12 by cutting parts of a cylindrical surface 11, which can be parallel (Fig. 3) or form another shape, for example, a rhombic (Fig. 2). The remaining part of the cylindrical surface forms in cross section mirror-shaped segments of arcs 13 (Fig. 2,3).

A slice of a portion of the cylindrical surface 11 of the retainer 8 provides a clearance h (FIG. 4) in the dimension direction L (FIG. 1) and is performed in order to reduce the calculated minimum clearances Slmm, S2mm (FIG. 4), thereby improving installation accuracy.

Slmin - the minimum clearance in the pairing of the hole of the sleeve 2 and

latch 9; S2min - the minimum clearance in the pairing of the bushing 3 and

latch 8.

The latch 9 (Fig.Z) is made elastic with a groove 14 aligned with the center of the latch. Due to the elasticity along the entire length of the groove, the latch 9 expands, excluding the Simin gap when combined with the bore of the sleeve 2 along the Y axis, as shown in Fig. 4, (or the X axis, depending on the installation option) while ensuring reliable constant electrical contact and grounding subunit.

The clamps have different lengths: the clamp 9 is longer than the clamp 8. This is necessary so that when docking, the clamp 9, which carries out the grounding, is docked first and opened last.

The device operates as follows:

when moving the subunit 7 into the housing 1, the latches 8.9 with their conical ends 10 interact with the conical surface 6 of the holes 4.5 of the bushings 2.3 and enter the holes 4.5.

The first contact is the latch 9, which is longer than the latch 8.

When the latch 8 interacts with the hole 5 of the sleeve 3, the gap h compensates the tolerances for the center distance L and / along the X axis, which increases the accuracy of the installation.

The bushings 2,3 are attached to the housing 1, and the latches 8.9 to the subunit 7 by means of fasteners 15,16,17 in the form of washers and nuts (Fig. 1,5).

Sources of information:

1. Copyright certificate No. 866798, IPC N 05 K 7/12, H 05 K 5/02, Н02В 1/02, 1980.

2. Copyright certificate No. 1115254, IPC Н 05 К 7/10, Н 05 К 7/12, 1982.

3. Certificate of authorship No. 1471326, IPC N 05 K 5/00, H 05 K 7/14, 1980 (prototype).

Claims (1)

An electronic block containing a housing and a subunit with interaction elements: clamps and bushings with equal diameters of the holes of the bushings and clamps, as well as center-to-center distances between them, characterized in that one of the clamps is made elastic with a groove and the other with faces forming mirror-shaped segments arcs, and the latch with a groove is longer than the latch with faces.