CN1341287A - Terminal board for connection of wires, in particular of electric energy conductors - Google Patents

Abstract

A terminal board comprising an envelope (1) from insulating plastic material that circumscribes a chamber; a foil (5) from conductive metal material provided with indentations (6) fastened in said chamber, and a lid (2, 2', 2'') also from insulating plastic material, that completes and closes said chamber, provided with protrusions (19) or thrust means that provide, during the lid closing step, to push and insert ends (7) of cables and wires (8, 9) to be connected with the indentations (6) of the metal foil (5).

Description

Terminal boards for connecting electrical wires, especially power conductors

The invention relates to a wiring board for connecting cables, especially power lines. More particularly, the present invention relates to terminal blocks comprising one or more armored power conductors.

The terminal block of the present invention has very limited dimensions, is not very large, is contained in a container made of plastics, and is provided with a novel, rational and fast means of connecting and hooking the ends of cables to be interconnected.

As is known, in order to connect cables, especially electrical conductors, terminals are generally used which press the surfaces of the conductors to be connected against each other. The pressure required to firmly press two surfaces against each other is obtained by different means, such as screws, pegs, rivets, etc.

These terminal blocks, although commonly used to make such connections, have several disadvantages that limit their use. These disadvantages are mainly due to the reduction of the contact surface between the wires; the easy oxidation of the wires in contact with each other that makes the electrical contact poor; it is necessary to have freely handleable terminals, and they are due to the cross-section and range of the cables to be connected. different; and especially the necessity to strip or remove the armor of a small portion of the wire, and to accurately connect or bond the parts to each other before making connections.

Stripping the armor that provides insulation protection to the cable is necessary to obtain the necessary connections and contacts. This operation must be carried out carefully, to prevent damage to the wires forming the conductors, and in accordance with regulations, which may vary according to the nature and necessity of the wires connected. Although accurate peeling can be obtained by using special tools for this operation, this operation always consumes a lot of time.

In order to avoid some of the above-mentioned disadvantages, it has been proposed to use terminal blocks provided with special connection means. They contain special retaining springs or switch blades, into which the ends of the cables to be connected are inserted and hooked onto the stripped cables so that contact is made. These terminal blocks also have the disadvantage of requiring stripping of the cable terminations.

The object of the present invention is to eliminate the above-mentioned disadvantages. In particular, the object of the present invention is to provide a terminal block for connecting cables so that there is no need for a process of stripping the terminals of the cables to be connected.

Another object of the present invention is to provide a cable terminal block that makes the steps of connection simple and quick, reduces the time required to implement the connection, and does not need to resort to tools or special devices.

According to the present invention, these and other objects highlighted in the following description are achieved by a terminal block comprising: an outer casing of insulating plastic surrounding a chamber; one side is of insulating plastic Manufactured, completed and closed cover of said chamber; and a device, fixed on said chamber, for connecting the terminals of cables and wires to be connected, wherein said connecting device is a conductive metal material The manufactured foil is provided with indentations, while the cover is provided with projections or push-in means for pushing or inserting the ends of the cables or wires to be connected into the indentations of the metal foil during the step of closing the cover.

The connecting metal foil may be made of steel or other suitable conductive material and may be of any shape and size and be provided with indentations or means capable of piercing, cutting and penetrating into the cables to be connected, at least up to the metal of said wires. Core. Preferred shapes of the cross-section of the foil are "V", "C", "U" or "L" shapes. At least one of the opposite arms or sides of the connecting foil is provided with a notch, the latter preferably having a length at least equal to half the diameter or thickness of the cable to be connected.

Each foil provides the connection of one pole of the cable or wire to be connected; thus the number of fixed foils per terminal board is equal to the number of poles of the cable or wire.

Said foil is fixed to the inner wall of the housing by any known fastening means; in particular and preferably by fitting with elastic pressure between the protrusions integral with the wall of the housing and the recesses obtained in the forming step. The advantage that is reached by terminal board of the present invention is many-sided, for example comprises following advantage:

- the connection of the cables is achieved in a convenient, simple and economical manner by a simple manual operation, without stripping the respective ends and without using locking means such as screws, pegs or rivets, without resorting to the use of springs or other Devices for stopping or restraining the ends of cables;

- the fastening of the relevant cables and their connections takes place by simple hand pressure during closing of the terminal board cover;

- all leads or cables or wires to be connected remain within the protective sheathing, none of which emerges from it;

- said terminal block can be used in any industrial, building and domestic sector;

- it allows significant time savings in use, preparation and production;

- the cables to be connected may have any diameter, very different cross-sections and number of poles;

- Since the cable is protected by the armor, any oxidation on the contact surfaces is prevented.

- Whether they are in direct or indirect contact with each other, the contact surface of the cables is very large.

By referring to the description of an embodiment of the accompanying drawings, the wiring board structural features and functional features and advantages of the present invention can be better understood, and the description is only illustrative and non-restrictive, wherein:

Figure 1 shows a schematic side perspective view of an embodiment of the terminal board of the present invention, provided with a complete cover and used for connecting a double board wire;

Fig. 2 shows the schematic cross-sectional view of the wiring board of the present invention taken in the A-A direction of Fig. 3, with an openable cover hanging in the central hinge;

Fig. 3 shows a schematic sectional view of the wiring board of Fig. 2 taken according to the B-B direction of Fig. 2; and

FIG. 4 shows a perspective view of a splined layered connecting element.

Referring to the accompanying drawings, the terminal block of the present invention comprises a housing 1 made of insulating plastic material surrounding a chamber, a cover 2 also made of insulating means which completes and closes said chamber. Said housing 1 and cover 2 are provided with holes for passing cables and wires 8,9. The cover can be a rigid body 2 manufactured as an integral piece, or it can be composed of two joint parts 2', 2" as shown in Figures 2 and 3. The two parts 2', 2" can be bent by bending The flexible walls 18 allow the process of opening and closing each part 2', 2" to be initiated independently of each other, and it is also possible to operate one part before the other as desired.

Inside the housing 1 and during the molding of said housing, fastening means are obtained which are mutually symmetrically arranged with respect to the F axis of the housing 1 and the cables 8 , 9 . One of their fastening means 4 is central and the two side fastening means 3 are arranged along the opposite walls of the housing 1 , parallel to the F axis. The central fastening means has an approximate "8" shape, while each side fastening means 3 comprises a rectilinear central part 3' and two side parts extending to the side walls of the housing 1. Each side portion of each fastening device 3 has a substantially "S" shape forming a recess 3", and at the free end may be provided with an annular groove 20 for receiving and fastening the armor 12, and / or fasten the slots 11 of the cables 8 , 9 .

Between the central fastening device 4 and each side fastening device 3, a connecting device 5 is inserted and fixed by elastic compression. The connecting device described in the embodiment shown as an example in the accompanying drawings is a switch blade made of steel or other metal more suitable for the conduction of electric current, having an open "V" shape, and each of its The alveolus 6 on the arm faces the cover 2 . By fitting the apex into the central "8"-shaped recess, and fitting the end into the side recess 3" of the side fastening device 3, the connecting foil 5 is securely fixed on the housing 1. This fitting fastening is achieved by It is obtained under pressure and the elasticity of the metal foil 5 facilitates this assembly.

The slots 6 are pierced, cut and fixed in the housing 1 with the ends 7 of the cables 8 , 9 involved in the connection.

A bracket 10 made of insulating material can be inserted under pressure between the central part 3' of the side fastening means 3 and the metal foil 5 to better secure said foil 5 stably to the side and central fastening means Between 3 and 4.

The cover 2 or the two parts 2' and 2" forming the cover are provided on the surface facing the housing 1 with projections 19 which hold the cables or wires 8, The ends 7 of 9 are pushed into the gullets 6 until they insert and penetrate between said gullets 6, being pierced or hooked in this way.

In order to secure the cover 2 or the two parts 2', 2" of the cover to the housing 1, the cover 2 or the parts 2', 2" thereof are provided with a cylindrical pin 15 having a fishbone-shaped protrusion, and, Correspondingly, the bottom surface of the housing 1 is provided with cylindrical, tubular, hollow protrusions 15', which also have fishbone gullets. Therefore, in the process of closing the cover 2 or parts 2', 2", the cylindrical pin 15 enters strongly into the recess of the cylindrical protrusion 15', and the fishbone protrusions hook each other together, holding the cover 2 or each of them The parts 2', 2" are fastened to the housing 1.

In order to ensure the tightness between the cover 2 and the shell 1, the wall portions 16, 17 of both the cover and the shell to be in contact with each other can be provided with herringbone protrusions, and the herringbone protrusions hook each other to hold the cover 2 or each of them. The parts 2', 2" are bound and further fastened to the housing 1.

Using the terminal block of the present invention is very simple, easy and fast. With the aid of the cover, the cables and wires 8, 9 are fastened between the tooth slots 11 of the side fastening means 3 or introduced into the armor 12 which is fastened to the annular grooves of the incoming side fastening elements 3 middle. Each end 7 of each pole of each said cable or wire 8 , 9 covered with a protective armor is aligned correspondingly with the slot 6 of each connecting foil 5 described above. The cover 2 or the parts 2', 2" constituting it are pressurized closed, either separately or jointly, so that the protrusion 19 pushes and presses the end 7 onto the slot 6. The slot 6 cuts and penetrates the cable or wire The armor of 8 and 9 reaches the strands of its wires to ensure that it can be connected and retained under strong pulling.

Although the invention has been described with reference to specific implementations, this is reported by way of example only, and many changes and modifications can be made by those of ordinary skill in the art in light of the above description. Therefore, the present invention is intended to embrace all modifications and changes falling within the spirit and scope of the appended claims.

Claims (12)

1. a terminal block contains a shell (1) of being made by the plastics of insulation and is holding a chamber; Lid (2,2 ', 2 "), make equally with the device of insulation, finish and seal described chamber; Jockey with the terminal (7) of a cable or wire to be connected, be fixed on the described chamber, it is characterized in that, described jockey is a kind of paper tinsel that is provided with teeth groove (6) (5) of conductive metallic material manufacturing, and cover (2,2 ', 2 ") are provided with projection (19) pushing in device in other words, in the step of closing lid cable to be connected or the end of electric wire (7) are pushed (6) in the teeth groove that inserts metal forming (5) in other words.

2. the described terminal block of claim 1 is characterized in that, connects metal forming (5) and is made by steel or other conducting metal.

3. claim 1 or 2 described terminal blocks, it is characterized in that, connecting metal forming (5) has the cross section of " V ", " C ", " U " or " L " shape, and at least one arm is provided with teeth groove (6), and the length of teeth groove (6) is at least as for the diameter of cable to be connected half of thickness in other words.

4. the described terminal block of claim 3 is characterized in that, connect metal forming (5) and have the cross section that is opened into " V " word shape, and two arms all is provided with in the face of the lid (teeth groove of 2,2 ' 2 ") (6).

5. the described terminal block of each of above claim is characterized in that, shell (1) is provided with the fastener (3,4) of paper tinsel (5), fastener (3,4) be in molding process, obtain and the position with respect to the axle F symmetry of shell (1); Described paper tinsel (5) is inserted between the described fastener (3,4) with elastic pressure.

6. the described terminal block of claim 5 is characterized in that, the fastener of paper tinsel (5) contains a central fastener (4), is the figure of eight and two side fasteners of placing along the opposite wall of shell (1) substantially, and F parallels to the axis; Each side device (3) contains the middle body (3) of a straight line and extends two sides of the serpentine sidewall that roughly reaches shell (1), thereby (3 "), described paper tinsel (5) is inserted between the depression (3 ') of the depression of central fastener (4) and each side fastener (3) with elastic pressure to form depression.

7. the described terminal block of claim 6 is characterized in that, the terminal of each side fastener (3) is provided with to be held with the cannelure (20) of fastening armouring (12) and/or be used for the teeth groove (11) of fastening armouring (8,9).

8. the described terminal block of each of above claim is characterized in that, also contains a support (10) made from insulating material, between the middle body (3 ') and metal forming (5) of inserting side fastener (3) of can pressurizeing.

9. the described terminal block of each of above claim is characterized in that, lid (2,2 ', 2 ") are provided with the fish-bone projection, and correspondingly, that the basal surface of shell (1) is provided with is cylindrical, the projection (15 ') of tubulose, hollow, and the fish-bone groove is also arranged; Closing cap (2,2 ', in the process of 2 "), cylindrical pins (15) enters in the depression of cylindrical protrusions (15 ') powerfully.

10. the described terminal block of each of above claim is characterized in that, lid (2,2 ', 2 ") and both wall portions that is in contact with one another when closing (16,17) of shell (1) all be provided with the fish-bone projection.

11. the described terminal block of each of above claim is characterized in that, lid (2) is to make unitarily formed rigid body.

12. any described terminal block of above claim is characterized in that, the part that two movable joints that lid is mutually combined by a bendable curved wall (18) connect (2 ', 2 ") constitute.

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