RU2174275C2 - Connecting block for high-speed data transmission - Google Patents

Abstract

FIELD: telecommunications and computer engineering. SUBSTANCE: block has plastic shroud with cells receiving terminal blade type contact members arranged in at least one row and with slits used to receive shielding plates and made in transversal walls between cells in parallel to their axes. Cells of one connecting block are spaced apart through maximum possible distance within shroud. Slits receiving shielding plates are made in transversal walls between every two adjacent contact blocks on bottom side. Distance between cells of one connecting block is much shorter than that between those of adjacent blocks. EFFECT: reduced junction noise and pickups of all kinds; facilitated wiring. 8 cl, 12 dwg

Description

 The invention relates to a connection block for high-speed transmission of information in telecommunications and computer engineering, consisting of a plastic housing with at least one row of cells for knife clamping contact elements and with slots located in the transverse walls between the cells parallel to their axis for shielding sheets.

 A connection block of this kind is previously known from US Pat. No. 5,160,273. In this case, the problem of transient or crosstalk and interference through cable cores connected to adjacent knife clamping contact elements must be solved by inserting a large number of conductive shielding sheets between individual pairs of knife clamping contact elements. The problem of transient or crosstalk and interference arises when transmitting large amounts of information via electrical wires, and information is transmitted at high frequencies. Transmission at such high frequencies causes radiation and interference between adjacent cable cores, in particular if these cable cores are located close to each other in the connection block. By inserting electrically conductive shielding sheets, greater damping of transient or crosstalk and interference is achieved at high information transfer rates.

 The known connecting block contains two parallel rows of cells for knife clamping contact elements, which are respectively given a shielding sheet, the opposite shielding sheets of both rows being connected to each other by means of a connecting sheet with a large area that is inserted into the corresponding lower part of the block. The use of electrically conductive shielding plates of a large area in the connection blocks requires, however, an increase in the volume of the construction of the connection blocks and the high cost of manufacturing the connection blocks.

 Therefore, the invention is based on the task of creating a connection block in which, thanks to the location of the shielding plates made in a special way, the transient and crosstalk and interference are effectively reduced and the installation of both shielding plates and cable cores on knife clamping contact elements is greatly simplified.

 To solve this problem, the invention provides that the cells of one connection block are located at the smallest possible interval between each other in a plastic case, and the slots for installing sheet screens are made in a thicker transverse wall between each two adjacent connecting blocks on the lower side. Due to this, it is possible with the help of only two shielding plates to shield a pair of cells located in a plastic housing at a minimum distance from each other, which form a connection block. The greater distance between the cells of adjacent connection blocks reduces the risk of transient and crosstalk and interference.

 According to a preferred embodiment, the shielding plates in the upper part have a fixing hole, which is fixed by a locking protrusion in the plastic housing when the shielding plate is inserted into the connection block. Shielding plates are inserted from the bottom of the connection block. Further, the shielding plates in the area of the contact pin have a cutout through which the wire is conveniently held. The transmission parameters are improved by creating a magnetic field on which these measures have a beneficial effect. The shielding plates are connected to each other by means of contact pins and wires, for example, on a printed circuit board.

 The protrusion provided in the preferred embodiment in the input area of the cable strand of the knife clamping contact element makes it easy to connect the cable strands by securely fixing the cable strands inserted manually by means of bulges in the input area before being pressed into the tool.

 According to another embodiment of the invention, the shielding plates of at least one cell can be connected to each other using narrow jumpers that are made in grooves on the base of the plastic case. This embodiment of the shielding plates allows you to mount the shielding plates with low technical and financial costs directly into the upper part of the connection block, so that the placement of the shielding plates according to the invention is also possible with core connectors, consisting of only one row of cells for knife clamping contact elements and without any bottom parts.

 Then, three shielding plates of two adjacent pairs of cells can be connected to each other with narrow jumpers to obtain cells from the shielding plates. In this case, the three shielding plates and the narrow bridges connecting them in the plane of the bridges have a figure eight formed from seven short sheet strips.

 It is particularly preferable that in the transverse wall between two pairs of closely spaced cells adjacent each other, a slot is respectively located, and in the transverse wall between respectively two pairs of closely spaced cells adjacent to each other, two parallel slots for the shielding plates are located. Thanks to this, a particularly compact design is possible, in particular, devices for connecting the cores.

 Due to the pairwise arrangement of the cells at a small distance from each other in the same row of the plastic case, the damping of crosstalk of the knife clamping contact elements inserted into these cells is further improved, since the distance of each pair of closely spaced adjacent cells of one connecting element to neighboring pairs of the other connecting element is greater than the distance between closely spaced neighboring cells. Due to this, the capacities of adjacent pairs of knife clamping contact elements arranged in a row are reduced, and the values of transient or crosstalk and interference are further improved.

 The invention is explained in more detail below on the basis of examples shown in the drawings of a connection block for high-speed transmission of information in telecommunications and computing.

They show:
FIG. 1. A top perspective view of the lower side of the connection block with shielding plates inserted in various stages;
FIG. 2. A side view of the connection block of FIG. 1 with shielding plates inserted;
FIG. 3. A top view of the lower side of the connection block of FIG. 2;
FIG. 4. A cross-sectional view of the connection block of FIG. 2 shields inserted together;
FIG. 5. Side view of the shielding plate;
FIG. 6. Side view of a knife clamping contact element;
FIG. 7. Side view of the connection block, with a partial break;
FIG. 8. A front view of the connection block of FIG. 7 with a partial section;
FIG. 9. Bottom view of the connection block of FIG. 7, 8 with a cage of shielding plates;
FIG. 10. Bottom view of the cell from the shielding plates;
FIG. 11. Side view of the cell from the shielding plates of FIG. 10 and
FIG. 12. A front view of the cell from the shielding plates of FIG. 10.

 According to the image in FIG. 1, the connecting block is made of plastic housing 1, which contains four connecting blocks 26 with two cells spaced apart at a distance d 2. Cells 2 are made on the upper side 5 of the block and are used to receive knife clamping contact elements 28. Each pair of cells 2 of one connecting block 26 is limited by a transverse wall 27, in which from the bottom side 23 is a slot 25 for inserting a shielding plate 24 with a contact pin 32. The distance d between cells 2 of one connector th unit 26 is considerably smaller than the distance D between the cells 2 adjacent a connector block 26. The distance d is at least 1.5 times the value of distance d. Each connecting block 26 consists of a pair of cells 2 with knife clamping contact elements 28 and a shielding plate 24. Referring to FIG. 1 to the left in the extended position, the shielding plate 24 is needed only if another block is attached in a row. The connecting block can also be made of separate for each connecting block 26 structural blocks of the plastic housing, which can be arranged in a row in any number of connecting blocks 26. Plastic housings 1 can be attached to each other in a row with the end faces 37 either smoothly or by means of fixing elements.

 In FIG. 2, the side view of the connection block shows the position of the knife clamping contact elements 28 in the plastic housing 1 and the spatial arrangement of the individual connecting blocks 26, as well as the distances d between the cells 2 of one connecting block 26 and to the adjacent connecting blocks 26. The knife clamping contact elements 28 are available with top side 5 of the connection block.

 According to the image in FIG. 6, the knife clamping contact elements 28 have an input part 29 for cable wires not shown, which is formed by opposite bulges 30 that close the extension in the form of a circle 31 at the top. Due to this, the cable core embedded in the extension 31 is pre-fixed and can then be push terminals 6 into the slot with the appropriate tool without any problems.

 In FIG. 3 shows a block in a bottom view showing the position of the contact pins 33 of the knife clamping contact elements 28 and the contact pins 32 of the shielding plates 24 with respect to each other and with respect to the lower side 23 of the block.

 From FIG. 5, one can get an idea of the shape of the shielding plates 24. The shielding plates 24 have a fixing hole 34, which, in combination with the corresponding locking protrusions 35, provides fixation in the upper part of the plastic housing 1 (Fig. 4). A recess 36 is provided in the area of the contact pin 32 to provide optimum wire direction.

 The position of the shielding plates 24 in the plastic housing 1 is shown in FIG. 4. It is seen that the surface support of the shielding plate 24 due to this position is reduced. The pin 32 is formed outside the central longitudinal axis of the shielding plate 24, so that there is enough space for the recess 36.

 In the following exemplary embodiment of FIG. 7-12, each cell 2 of FIG. 7 includes a terminal slot 6 with lateral clamping jumpers 7 for clamping the insulation of the cable core, the wire of which is pressed into the knife clamping contact element 3 and at the same time is in contact with the knife clamping contact element 3 without soldering, without the use of a screw and without removing insulation. On the bottom side 23 of the plastic housing 1 are made of plastic mounting pins 8, which are used to fasten the connectors of the cores, for example, on printed circuit boards.

 As shown in FIG. 7 and 9, the distance d between two adjacent terminal slots 6 for inserting a pair of knife clamping contact elements 3 is also smaller than the distance D between the terminal slot 6 of the cells 2 of one pair and the terminal slot 6 of the cell 2 of the adjacent pair. In the transverse wall 9, made between two pairs of cells 2 located in close proximity, a slot 11 is made on the lower side 21, and two slots 11 are made on the lower side 23 in the wider transverse wall 10, located between two groups of pairs in close proximity, which are connected to each other by grooves 13, 14, 15 on the lower side 23 in the base 12 of the core connector, as shown in the bottom view of FIG. 9.

 In the slot 11 and the slots 12-14 of each two adjacent pairs of cells 2 or two adjacent groups of cells 2, the one shown in FIG. 10-12 cage of shielding plates 15. It includes three shielding plates 16, which are pushed into the cuts 11 between pairs of adjacent cells 2, from the bottom side 23 into the plastic housing 1, as well as narrow jumpers 17, 18, 19, which are included in the grooves 12-14 on the base side of the plastic housing 1 when the shielding plates 16 are fully retracted into the corresponding slots 11.

 The three shielding plates 16 and the narrow lintels 17-19 connecting them have a figure eight in the plane of the lintel 17-19 formed from seven short sheet strips, as shown in FIG. 10. In this case, respectively, the outer shielding plates 16 are slightly bent at diagonally opposite angles 20, as shown in FIG. 10.

 In order for both cells from the shielding plates 15 of FIG. 7-9 of the plastic casing 1 of the connector of the veins easily entered, in the transverse wall 9 between two pairs of cells 2 located in close proximity, a slot 11 was made, and in the transverse wall 10 between respectively two groups of pairs of cells 3 densely located next to each other, two parallel the slots 11 for the shielding plates 16 of the corresponding cell from the shielding plates 15.

 Each of the two cells from the shielding plates 15 has in the middle part of the plastic casing 1 a core connector, in which two parallel slots 11 are made in the transverse wall 10 for two shielding plates 16, on the lower side of the shielding plate 16 along the ground tap 21, as shown in FIG. 7, 11, and 12. They are connected to an unshown ground point of a circuit board not shown here. The individual knife clamping contact elements 3 have contact pins 22 protruding from the lower side for connection with the respective conductive lines of the printed circuit board.

Notation list
1 plastic case
2 cell
3 knife clamping contact element
4 notch
5 top side
6 terminal slot
7 terminal jumper
8 fixing pin
9 transverse wall
10 transverse wall
11 slot
12 groove
13 groove
14 groove
15 cell of shielding plates
16 shielding plate
17 jumper
18 jumper
19 jumper
20 angle
21 grounding terminal
22 pin pin
23 bottom side
24 shielding plate
25 slot
26 connection block
27 transverse wall
28 knife clamping contact element
29 input
30 thickening
31 extensions
32 pin pin
33 pin pin
34 fixing hole
35 protrusion locking
36 notch
37 end side

Claims (8)

 1. A connection block for high-speed transmission of information in telecommunications and computer engineering, comprising a plastic case with at least one row of cells for knife clamping contact elements located on the upper side and with slots for shielding plates arranged in transverse walls between cells parallel to their axis, characterized in that the plastic case contains connection blocks with two cells in each, cells (2) of one connection block (26) p are located at the minimum possible distance from each other in a plastic case (1), and the slots (11, 25) for the shielding plates (16, 24) are made in the transverse wall (9, 10, 27) between two adjacent connecting blocks (26), respectively on the bottom side (23), and the distance d between the cells of one connecting block (26) is much smaller than the distance D between the cells (2) of the adjacent connecting blocks (26).  2. A connection block according to claim 1, characterized in that the shielding plates (24) are inserted from the bottom side (23) of the plastic housing (1), are fixed therein by means of a locking protrusion (35) in the plastic housing (1) by means of a fixing hole (34) and connected to each other by wiring on a printed circuit board.  3. A connection block according to claim 1 or 2, characterized in that in the shielding plates (24) near the contact pin (32), a recess (36) is made for conducting the wire.  4. A connection block according to any one of claims 1 to 3, characterized in that knife clamping contact elements (28) are installed in the cells (2) with cable fixing (30, 31) in the input part (29).  5. Connection block according to claim 1, characterized in that the shielding plates (16) of at least one cell (2) are connected to each other by means of narrow jumpers (17, 18, 19), which are inserted into the grooves (12 , 13, 14) in the base of the plastic case (1).  6. Connection block according to claim 5, characterized in that the three shielding plates (16) of two adjacent pairs of cells (2) are connected to each other with narrow jumpers (17, 18, 19) to form a cell (15) from the shielding plates .  7. A connection block according to claim 6, characterized in that the three shielding plates (16) and the narrow jumpers connecting them (17, 18, 19) in the plane have the shape of a figure eight formed of seven short stripes of sheet.  8. A connecting block according to claim 6, characterized in that a cut (11) is made in the transverse wall (9) between two pairs of adjacent cells (2), and in the wider transverse wall (10) located between the two groups in close In the vicinity of pairs of cells, between each two pairs of cells (2) densely located next to each other, respectively, are located two parallel slots (11) for the shielding plates (16).

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