Insulated jumper in particular for terminal blocks of switchboards

- Morsettitalia S.p.A.

Electrical connection jumper, in particular for terminal blocks of switchboards, comprising a conducting body extending in the longitudinal direction and a plurality of connector elements for electrical connection, which extend in the transverse direction from said conducting body, and an insulating body, integral with said conducting body, said insulating body comprising a longitudinally extending gripping part and pairs of lugs which extend therefrom in a substantially transverse direction and are able to contain partially said conducting body.

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Description
BACKGROUND

1. Technical Field of the Invention

The present invention relates to an insulated jumper in particular for terminal blocks of switchboards and the like.

2. Description of the Prior Art

It is known in the technical sector relating to terminal blocks for switchboards that there exists the need to connect together two terminals arranged alongside each other on the board in order to form the required electric circuit.

Jumpers made of conductive material and designed for this purpose are also known; said jumpers are formed by a conductive metal strip extending in a substantially longitudinal direction having, extending from it in a direction perpendicular to the above direction, flat pins formed in the manner of two resilient jaws able to form the part for engagement in the seat of the terminal block.

These known jumpers, although fulfilling their purpose, since they can be easily cut in the transverse direction in order to determine correct measurement in the longitudinal direction, have the drawback, however, that they cannot be electrically insulated with respect to the exterior, in particular at the time of use by a user; this results in a high risk of contact with the user him/herself and/or with foreign bodies and therefore injury both for the former, who may suffer an electric shock, and damage for the system which is short-circuited.

In order to solve the problem of insulation, jumpers are also known where the conductive strip is embedded in an insulating body; in this case also, however, there is the risk of drawbacks arising from the fact that cutting to size of the jumper is difficult owing to the double and different superimposed material, which requires complicated cutting operations using different tools respectively adapted to the type and thickness of material to be cut, making cutting practically impossible.

SUMMARY

The technical problem which is posed, therefore, is to provide electrical connection jumpers, in particular for terminals of switchboards, which are able to be cut to size and ensure perfect insulation of the visible conducting parts so as to prevent them from coming into contact with the user and/or with foreign bodies, causing short-circuits of the system.

In connection with this problem it is also required that this jumper should have small dimensions, be easy and inexpensive to produce and assemble and be able to be adapted easily at any user location using cutting means which are easy and inexpensive to provide.

These results are obtained according to the present invention by an electrical connection jumper, in particular for terminal blocks of switchboards and the like, comprising a conducting body extending in the longitudinal direction, a plurality of connector elements extending in the transverse direction from said conducting body, and an insulating body, integral with said conducting body, said insulating body comprising a longitudinally extending gripping part and pairs of oppositely arranged lugs which extend therefrom and are able to contain partially said connector elements.

BRIEF DESCRIPTION OF THE FIGURES

Further details may be obtained from the following description of a non-limiting example of embodiment of the subject of the present invention provided with reference to the accompanying drawings in which:

FIG. 1 shows a perspective view of a jumper according to the present invention, in its entirety;

FIG. 2 shows a side view of the jumper according to FIG. 1;

FIG. 3 shows a schematic cross-section along the plane indicated by III-III in FIG. 2;

FIG. 4 shows a schematic cross-section along the plane indicated by IV-IV in FIG. 2; and

FIG. 5 shows a schematic cross-section along the plane indicated by V-V in FIG. 2.

 DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

As shown in FIGS. 1 and 2 and assuming solely for the sake of convenience of the description and without a restrictive meaning, a set of three reference axes with a longitudinal direction X-X, transverse direction Y-Y and vertical direction Z-Z, respectively, the jumper for terminal blocks of switchboards according to the present invention comprises essentially: a conducting body 10 extending in the longitudinal direction X-X in the form of a thin strip 11 which has suitable dimensions for the electric load envisaged, and a plurality of connector elements 12 which extend in the transverse direction Y-Y from said strip 11 and are formed by a neck 12a which is extended by one or more (two in the example of the figure) flat pins 13 for connection to the terminal (not shown).

The conducting body 10 is integrally joined to an insulating body 20 comprising a substantially continuous, longitudinally extending gripping part 21 which, in the example shown in the figure, has a circular cross-section with, extending from it, pairs of lugs 22 symmetrically arranged opposite each in the transverse direction Y-Y and aligned with each other in the longitudinal direction at a constant interval.

The lugs 22 of each pair are suitably spaced from each other in the transverse direction Y-Y so as to form a respective seat 22a in the vertical direction, such as not to penetrate into the gripping part 21 of the longitudinally extending insulating body 20.

As shown in FIG. 3, said lugs 22 have pins 22b extending in the transverse direction Y-Y and suitable for engagement with a corresponding seat 14 open in the transverse direction in the neck 12a of the conducting part 10.

In this way the connection between conducting body 10 and insulating body 20 ensures that the gripping part 21 of the said insulating body is free of electrical conduction.

Advantageously this connection is obtained by overmoulding the insulator onto the conducting body.

It can also be seen how, at the opposite ends, the insulating body always projects in the longitudinal direction X-X beyond the conducting body, thus ensuring insulation of the jumper with respect to the user.

This configuration provides numerous advantages compared to the prior art since, when the jumper is cut to size, it will be possible to cut separately the insulating material and the conducting strip, thus ensuring the ease of cutting using conventional tools.

In addition to this, cutting may be performed both in a position T1 predisposed for cutting (FIG. 4) by means of an annular undercut 25 of the gripping part and in a position T2 which is not predisposed for cutting (FIG. 5), while keeping, however, the gripping part totally insulated.

Said predisposed cutting zone T1 or non-predisposed cutting zone T2 is situated between two pairs of lugs 22 which are adjacent in the longitudinal direction, and the vertical cutting plane of the conducting part is inset in the longitudinal direction with respect to the cutting plane of the insulating body; correspondingly cutting of the conducting body 10 produces zones 15 where the conductor is inset in the longitudinal direction with respect to the cutting zone T1/T2 of the gripping part 21; in this way, since it is possible to obtain a free conducting edge which is set back from the insulating body, the risks of contact with the conducting part are reduced considerably.

Although illustrated and described in relation to a strip extending longitudinally as appropriate and to be cut, subsequently, to size, it is envisaged also that the jumper may be designed in modular form with a single connection body, with two or more bodies, or with a non-uniform succession of cutting zones determined by the alternating arrangement of jumpers with one, two or three, etc. connections.

Although not shown, it is envisaged moreover that the electrical connection part 13 may be formed with a screw element and/or clamp element as required and/or appropriate.

It can therefore be seen how with the electrical connection jumper for switchboard terminal blocks according to the present invention it is possible to achieve easily the production and/or cutting to size of the jumper and at the same time insulation of the gripping part which no longer contains the conducting part.

Claims

1. An electrical connection jumper for terminal blocks of switchboards, comprising a conducting body extending in a longitudinal direction and a plurality of connector elements for electrical connection, which extend in a transverse direction from said conducting body, and an insulating body, integral with said conducting body, wherein said insulating body comprises a longitudinally extending gripping part and pairs of lugs which extend there from in a substantially transverse direction and partially contain said conducting body, wherein the pairs of lugs are spaced from each other in the transverse direction so as to form a respective seat for the conducting body.

2. The jumper according to claim 1, wherein said gripping part of the insulating body is continuous.

3. The jumper according to claim 1, wherein said lugs are arranged symmetrically opposite each other in the transverse direction.

4. The jumper according to claim 1, wherein a depth in the vertical direction of said seat formed by the lugs is such as not to penetrate into the gripping part of the insulating body extending longitudinally.

5. The jumper according to claim 1, wherein the conducting body includes at least one neck and at least one connection element extending from each neck.

6. The jumper according to claim 5, wherein said lugs have at least one pin extending in a transverse direction and engaging a seat which is open in the transverse direction in the neck of the conducting body.

7. The jumper according to claim 6, wherein said connection element comprises one or more flat pins which extend in the transverse direction from said neck for connection to a switchboard terminal.

8. The jumper according to claim 6, wherein said connection element comprises screw means which extend in the transverse direction from said neck for connection to a switchboard terminal.

9. The jumper according to claim 6, wherein the lugs are partially overmoulded onto the neck of the conducting body.

10. The jumper according to claim 6, wherein the neck is formed as a strip of suitable length in the longitudinal direction.

11. The jumper according to claim 1, wherein the insulating body is overmoulded onto the conducting body.

12. The jumper according to claim 1, wherein said gripping part of the insulating body has at least one annular undercut that defines a cutting zone of the gripping part that is predisposed for transverse cutting.

13. The jumper according to claim 12, wherein said cutting zone is situated between two pairs of lugs adjacent in the longitudinal direction.

14. The jumper according to claim 12, wherein a vertical cutting plane of the conducting body is aligned in the longitudinal direction with respect to the cutting zone of the gripping part.

15. The jumper according to claim 1, wherein said pairs of lugs symmetrically arranged opposite each other in the transverse direction are spaced from each other in the longitudinal direction at a constant interval.

16. The jumper according to claim 1, wherein the opposite ends of the insulating body project in the longitudinal direction with respect to the conducting body.

Referenced Cited
U.S. Patent Documents
945017 January 1910 Cole
2045847 June 1936 Fotsch
2082947 June 1937 Fotsch
2900618 August 1959 Geier
3159730 December 1964 Staffel
3609642 September 1971 Norden
3665376 May 1972 Paris et al.
3751579 August 1973 Nojiri
3775733 November 1973 Ege
3840781 October 1974 Brown
4070086 January 24, 1978 Trafford
4130331 December 19, 1978 Neff et al.
4171861 October 23, 1979 Hohorst
4203200 May 20, 1980 Wiebe
4224592 September 23, 1980 Urani et al.
4241975 December 30, 1980 Cooper, Jr.
4330164 May 18, 1982 Pittman et al.
4340270 July 20, 1982 Wilmes et al.
4350407 September 21, 1982 Tong
4365396 December 28, 1982 Baba et al.
4391485 July 5, 1983 Urani
4444455 April 24, 1984 Wiancko et al.
4559504 December 17, 1985 Krec
4693533 September 15, 1987 Szczesny et al.
4795997 January 3, 1989 Fisher et al.
4889504 December 26, 1989 Barbier et al.
4921450 May 1, 1990 Herbert
4940431 July 10, 1990 Hennemann
5002505 March 26, 1991 Jones et al.
5030131 July 9, 1991 Boehm
5243139 September 7, 1993 Law
5276280 January 4, 1994 Ball
5328392 July 12, 1994 Lin et al.
5454730 October 3, 1995 Tozuka
5553787 September 10, 1996 Guginsky
5564941 October 15, 1996 Norden
5766044 June 16, 1998 Norden
5853304 December 29, 1998 Landreau et al.
5860837 January 19, 1999 Bock et al.
5905230 May 18, 1999 Marik
5915998 June 29, 1999 Stidham et al.
6004167 December 21, 1999 Hirakawa
6157287 December 5, 2000 Douglass et al.
6475038 November 5, 2002 Franck
6786779 September 7, 2004 Feldmeier et al.
7101231 September 5, 2006 Prokup et al.
7385518 June 10, 2008 Torrez et al.
7413486 August 19, 2008 Pizzi
7438606 October 21, 2008 Pizzi
7500889 March 10, 2009 Pizzi
20020067279 June 6, 2002 Torrez et al.
20050042912 February 24, 2005 Drewes et al.
20050221665 October 6, 2005 Otto et al.
20060128232 June 15, 2006 Kim
20060148302 July 6, 2006 Patel et al.
20060189222 August 24, 2006 Bogiel et al.
20060228950 October 12, 2006 Jamaleddin et al.
20070159292 July 12, 2007 Chang et al.
20080242150 October 2, 2008 Chikamatsu et al.
Foreign Patent Documents
1842868 December 1961 DE
3339365 May 1985 DE
3621071 January 1987 DE
3629796 December 1987 DE
3805158 August 1989 DE
4223540 January 1994 DE
4231244 March 1994 DE
4409612 September 1994 DE
19530947 January 1997 DE
19542628 February 1997 DE
19729327 October 1998 DE
29821558 March 1999 DE
29921080 April 2001 DE
10010719 August 2001 DE
10324144 February 2005 DE
102004018553 November 2005 DE
202005005369 March 2006 DE
0382999 August 1990 EP
0678934 October 1995 EP
0893859 January 1999 EP
1137034 September 2001 EP
1137035 September 2001 EP
1381068 January 2004 EP
1531522 May 2005 EP
1536519 June 2005 EP
1630903 March 2006 EP
1798821 June 2007 EP
1860738 November 2007 EP
1887658 February 2008 EP
2259462 August 1975 FR
2529024 December 1983 FR
2637740 April 1990 FR
2766628 January 1999 FR
2342508 April 2000 GB
Other references
  • European Search Report from EP08075059, dated, Aug. 24, 2009.
Patent History
Patent number: RE42022
Type: Grant
Filed: Feb 12, 2009
Date of Patent: Jan 4, 2011
Assignee: Morsettitalia S.p.A. (Milan)
Inventor: Giordano Pizzi (Milan)
Primary Examiner: Hae Moon Hyeon
Attorney: Mintz Levin Cohn Ferris Glovsky and Popeo, P.C.
Application Number: 12/370,105